Agenda packet — Rancho Mirage City Council, December 4, 2025 (part 2 of 6)

0.08 0.08 0.01 0.91 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 2.43 2.43 < 0.005 < 0.005 — 2.44 Total 0.81 0.80 0.01 0.91 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 2.43 2.43 < 0.005 < 0.005 — 2.44 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Consum
er
Product
s

0.67 0.67 — — — — — — — — — — — — — — — —
Architect
ural
Coating
s

0.05 0.05 — — — — — — — — — — — — — — — —
Total 0.72 0.72 — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Consum
er
Product
s

0.12 0.12 — — — — — — — — — — — — — — — —
256
-------------------

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————————————————0.010.01Architect
ural
Coating
Landsca
pe
Equipm
ent

0.01 0.01 < 0.005 0.08 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 0.20 0.20 < 0.005 < 0.005 — 0.20 Total 0.14 0.14 < 0.005 0.08 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 0.20 0.20 < 0.005 < 0.005 — 0.20

4.4. Water Emissions by Land Use

4.4.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 1.25 24.7 25.9 0.13 < 0.005 — 30.1 Total — — — — — — — — — — — 1.25 24.7 25.9 0.13 < 0.005 — 30.1 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 1.25 24.7 25.9 0.13 < 0.005 — 30.1 Total — — — — — — — — — — — 1.25 24.7 25.9 0.13 < 0.005 — 30.1 Annual — — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 0.21 4.08 4.29 0.02 < 0.005 — 4.98 Total — — — — — — — — — — — 0.21 4.08 4.29 0.02 < 0.005 — 4.98257

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4.4.2. Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 1.25 24.7 25.9 0.13 < 0.005 — 30.1 Total — — — — — — — — — — — 1.25 24.7 25.9 0.13 < 0.005 — 30.1 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 1.25 24.7 25.9 0.13 < 0.005 — 30.1 Total — — — — — — — — — — — 1.25 24.7 25.9 0.13 < 0.005 — 30.1 Annual — — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 0.21 4.08 4.29 0.02 < 0.005 — 4.98 Total — — — — — — — — — — — 0.21 4.08 4.29 0.02 < 0.005 — 4.98

4.5. Waste Emissions by Land Use

4.5.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
258

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Single
Family
Housing
— — — — — — — — — — — 7.94 0.00 7.94 0.79 0.00 — 27.8
Total — — — — — — — — — — — 7.94 0.00 7.94 0.79 0.00 — 27.8 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 7.94 0.00 7.94 0.79 0.00 — 27.8
Total — — — — — — — — — — — 7.94 0.00 7.94 0.79 0.00 — 27.8 Annual — — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 1.32 0.00 1.32 0.13 0.00 — 4.60
Total — — — — — — — — — — — 1.32 0.00 1.32 0.13 0.00 — 4.60

4.5.2. Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 7.94 0.00 7.94 0.79 0.00 — 27.8
Total — — — — — — — — — — — 7.94 0.00 7.94 0.79 0.00 — 27.8 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 7.94 0.00 7.94 0.79 0.00 — 27.8
259

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Total — — — — — — — — — — — 7.94 0.00 7.94 0.79 0.00 — 27.8 Annual — — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 1.32 0.00 1.32 0.13 0.00 — 4.60
Total — — — — — — — — — — — 1.32 0.00 1.32 0.13 0.00 — 4.60

4.6. Refrigerant Emissions by Land Use

4.6.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — — — — — — 0.22 0.22
Total — — — — — — — — — — — — — — — — 0.22 0.22
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — — — — — — 0.22 0.22
Total — — — — — — — — — — — — — — — — 0.22 0.22
Annual — — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — — — — — — 0.04 0.04
Total — — — — — — — — — — — — — — — — 0.04 0.04
260

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4.6.2. Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — — — — — — 0.22 0.22
Total — — — — — — — — — — — — — — — — 0.22 0.22
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — — — — — — 0.22 0.22
Total — — — — — — — — — — — — — — — — 0.22 0.22
Annual — — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — — — — — — 0.04 0.04
Total — — — — — — — — — — — — — — — — 0.04 0.04

4.7. Offroad Emissions By Equipment Type

4.7.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Equipm
ent
Type
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e 261

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——————————————————Daily,
Summer
(Max)
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.7.2. Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Equipm
ent
Type
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.8. Stationary Emissions By Equipment Type

4.8.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) 262

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CO2eRN2OCH4CO2TNBCO2BCO2PM2.5TPM2.5DPM2.5EPM10TPM10DPM10ESO2CONOxROGTOGEquipm ent
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.8.2. Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Equipm
ent
Type
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.9. User Defined Emissions By Equipment Type

4.9.1. Unmitigated 263

RNCH 005 - 16 Lot Subdivision (TTM 38971) Detailed Report, 7/12/2024 59 / 80
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Equipm
ent
Type
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.9.2. Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Equipm
ent
Type
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.10. Soil Carbon Accumulation By Vegetation Type
264

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4.10.1. Soil Carbon Accumulation By Vegetation Type - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Vegetati
on
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.10.2. Above and Belowground Carbon Accumulation by Land Use Type - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.10.3. Avoided and Sequestered Emissions by Species - Unmitigated265

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Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Species TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Avoided — — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Sequest
ered
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Remove
d
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
— — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Avoided — — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Sequest
ered
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Remove
d
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
— — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Avoided — — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Sequest
ered
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —266
-------------------

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Remove — — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
— — — — — — — — — — — — — — — — — — —

4.10.4. Soil Carbon Accumulation By Vegetation Type - Mitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Vegetati
on
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.10.5. Above and Belowground Carbon Accumulation by Land Use Type - Mitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —267

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Total — — — — — — — — — — — — — — — — — —

4.10.6. Avoided and Sequestered Emissions by Species - Mitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Species TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Avoided — — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Sequest
ered
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Remove
d
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
— — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Avoided — — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Sequest
ered
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Remove
d
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
— — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Avoided — — — — — — — — — — — — — — — — — —268
-------------------

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Subtotal — — — — — — — — — — — — — — — — — —
Sequest
ered
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Remove
d
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
— — — — — — — — — — — — — — — — — — —

5. Activity Data

5.1. Construction Schedule
Phase Name Phase Type Start Date End Date Days Per Week Work Days per Phase Phase Description Demolition Demolition 7/1/2025 7/29/2025 5.00 20.0 —
Site Preparation Site Preparation 7/30/2025 8/13/2025 5.00 10.0 — Grading Grading 8/14/2025 9/25/2025 5.00 30.0 —
Building Construction Building Construction 9/26/2025 11/20/2026 5.00 300 — Paving Paving 11/21/2026 12/19/2026 5.00 20.0 —
Architectural Coating Architectural Coating 12/20/2026 1/17/2027 5.00 20.0 —

5.2. Off-Road Equipment

5.2.1. Unmitigated
Phase Name Equipment Type Fuel Type Engine Tier Number per Day Hours Per Day Horsepower Load Factor Demolition Rubber Tired Dozers Diesel Average 2.00 8.00 367 0.40 Demolition Excavators Diesel Average 3.00 8.00 36.0 0.38 Demolition Concrete/Industrial
Saws
Diesel Average 1.00 8.00 33.0 0.73
Site Preparation Rubber Tired Dozers Diesel Average 3.00 8.00 367 0.40269

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Site Preparation Tractors/Loaders/Back Diesel Average 4.00 8.00 84.0 0.37 Grading Graders Diesel Average 1.00 8.00 148 0.41
Grading Excavators Diesel Average 2.00 8.00 36.0 0.38
Grading Tractors/Loaders/Back
hoes
Diesel Average 2.00 8.00 84.0 0.37
Grading Scrapers Diesel Average 2.00 8.00 423 0.48
Grading Rubber Tired Dozers Diesel Average 1.00 8.00 367 0.40 Building Construction Forklifts Diesel Average 3.00 8.00 82.0 0.20 Building Construction Generator Sets Diesel Average 1.00 8.00 14.0 0.74 Building Construction Cranes Diesel Average 1.00 7.00 367 0.29 Building Construction Welders Diesel Average 1.00 8.00 46.0 0.45 Building Construction Tractors/Loaders/Back
hoes
Diesel Average 3.00 7.00 84.0 0.37
Paving Pavers Diesel Average 2.00 8.00 81.0 0.42
Paving Paving Equipment Diesel Average 2.00 8.00 89.0 0.36 Paving Rollers Diesel Average 2.00 8.00 36.0 0.38
Architectural Coating Air Compressors Diesel Average 1.00 6.00 37.0 0.48

5.2.2. Mitigated
Phase Name Equipment Type Fuel Type Engine Tier Number per Day Hours Per Day Horsepower Load Factor Demolition Rubber Tired Dozers Diesel Average 2.00 8.00 367 0.40 Demolition Excavators Diesel Average 3.00 8.00 36.0 0.38 Demolition Concrete/Industrial
Saws
Diesel Average 1.00 8.00 33.0 0.73
Site Preparation Rubber Tired Dozers Diesel Average 3.00 8.00 367 0.40 Site Preparation Tractors/Loaders/Back
hoes
Diesel Average 4.00 8.00 84.0 0.37
Grading Graders Diesel Average 1.00 8.00 148 0.41
Grading Excavators Diesel Average 2.00 8.00 36.0 0.38270

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Grading Tractors/Loaders/Back Diesel Average 2.00 8.00 84.0 0.37 Grading Scrapers Diesel Average 2.00 8.00 423 0.48
Grading Rubber Tired Dozers Diesel Average 1.00 8.00 367 0.40 Building Construction Forklifts Diesel Average 3.00 8.00 82.0 0.20 Building Construction Generator Sets Diesel Average 1.00 8.00 14.0 0.74 Building Construction Cranes Diesel Average 1.00 7.00 367 0.29 Building Construction Welders Diesel Average 1.00 8.00 46.0 0.45 Building Construction Tractors/Loaders/Back
hoes
Diesel Average 3.00 7.00 84.0 0.37
Paving Pavers Diesel Average 2.00 8.00 81.0 0.42
Paving Paving Equipment Diesel Average 2.00 8.00 89.0 0.36 Paving Rollers Diesel Average 2.00 8.00 36.0 0.38
Architectural Coating Air Compressors Diesel Average 1.00 6.00 37.0 0.48

5.3. Construction Vehicles

5.3.1. Unmitigated
Phase Name Trip Type One-Way Trips per Day Miles per Trip Vehicle Mix Demolition ————
Demolition Worker 15.0 18.5 LDA,LDT1,LDT2
Demolition Vendor —10.2 HHDT,MHDT
Demolition Hauling 0.00 20.0 HHDT
Demolition Onsite truck ——HHDT
Site Preparation ————
Site Preparation Worker 17.5 18.5 LDA,LDT1,LDT2
Site Preparation Vendor —10.2 HHDT,MHDT
Site Preparation Hauling 0.00 20.0 HHDT
Site Preparation Onsite truck ——HHDT
Grading ————271

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Grading Worker 20.0 18.5 LDA,LDT1,LDT2
Grading Vendor —10.2 HHDT,MHDT
Grading Hauling 0.00 20.0 HHDT
Grading Onsite truck ——HHDT
Building Construction ————
Building Construction Worker 5.76 18.5 LDA,LDT1,LDT2
Building Construction Vendor 1.71 10.2 HHDT,MHDT
Building Construction Hauling 0.00 20.0 HHDT
Building Construction Onsite truck ——HHDT
Paving ————
Paving Worker 15.0 18.5 LDA,LDT1,LDT2
Paving Vendor —10.2 HHDT,MHDT
Paving Hauling 0.00 20.0 HHDT
Paving Onsite truck ——HHDT
Architectural Coating ————
Architectural Coating Worker 1.15 18.5 LDA,LDT1,LDT2
Architectural Coating Vendor —10.2 HHDT,MHDT
Architectural Coating Hauling 0.00 20.0 HHDT
Architectural Coating Onsite truck ——HHDT

5.3.2. Mitigated
Phase Name Trip Type One-Way Trips per Day Miles per Trip Vehicle Mix Demolition ————
Demolition Worker 15.0 18.5 LDA,LDT1,LDT2
Demolition Vendor —10.2 HHDT,MHDT
Demolition Hauling 0.00 20.0 HHDT
Demolition Onsite truck ——HHDT
Site Preparation ————272

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Site Preparation Worker 17.5 18.5 LDA,LDT1,LDT2
Site Preparation Vendor —10.2 HHDT,MHDT
Site Preparation Hauling 0.00 20.0 HHDT
Site Preparation Onsite truck ——HHDT
Grading ————
Grading Worker 20.0 18.5 LDA,LDT1,LDT2
Grading Vendor —10.2 HHDT,MHDT
Grading Hauling 0.00 20.0 HHDT
Grading Onsite truck ——HHDT
Building Construction ————
Building Construction Worker 5.76 18.5 LDA,LDT1,LDT2
Building Construction Vendor 1.71 10.2 HHDT,MHDT
Building Construction Hauling 0.00 20.0 HHDT
Building Construction Onsite truck ——HHDT
Paving ————
Paving Worker 15.0 18.5 LDA,LDT1,LDT2
Paving Vendor —10.2 HHDT,MHDT
Paving Hauling 0.00 20.0 HHDT
Paving Onsite truck ——HHDT
Architectural Coating ————
Architectural Coating Worker 1.15 18.5 LDA,LDT1,LDT2
Architectural Coating Vendor —10.2 HHDT,MHDT
Architectural Coating Hauling 0.00 20.0 HHDT
Architectural Coating Onsite truck ——HHDT

5.4. Vehicles

5.4.1. Construction Vehicle Control Strategies
Non-applicable. No control strategies activated by user.273

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5.5. Architectural Coatings
Phase Name Residential Interior Area
Coated (sq ft)
Residential Exterior Area
Coated (sq ft)
Non-Residential Interior Area
Coated (sq ft)
Non-Residential Exterior Area
Coated (sq ft)
Parking Area Coated (sq ft)
Architectural Coating 63,180 21,060 0.00 0.00 —

5.6. Dust Mitigation

5.6.1. Construction Earthmoving Activities
Phase Name Material Imported (cy)Material Exported (cy)Acres Graded (acres)Material Demolished (sq. ft.)Acres Paved (acres) Demolition 0.00 0.00 0.00 ——
Site Preparation ——15.0 0.00 —
Grading ——90.0 0.00 —
Paving 0.00 0.00 0.00 0.00 0.18

5.6.2. Construction Earthmoving Control Strategies
Non-applicable. No control strategies activated by user.

5.7. Construction Paving
Land Use Area Paved (acres)% Asphalt
Single Family Housing 0.18 0%

5.8. Construction Electricity Consumption and Emissions Factors kWh per Year and Emission Factor (lb/MWh)
Year kWh per Year CO2 CH4 N2O
2025 0.00 532 0.03 < 0.005
2026 0.00 532 0.03 < 0.005
2027 0.00 532 0.03 < 0.005274

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5.9. Operational Mobile Sources

5.9.1. Unmitigated
Land Use Type Trips/Weekday Trips/Saturday Trips/Sunday Trips/Year VMT/Weekday VMT/Saturday VMT/Sunday VMT/Year Single Family
Housing
151 153 137 54,471 1,889 1,909 1,711 681,259

5.9.2. Mitigated
Land Use Type Trips/Weekday Trips/Saturday Trips/Sunday Trips/Year VMT/Weekday VMT/Saturday VMT/Sunday VMT/Year Single Family
Housing
151 153 137 54,471 1,889 1,909 1,711 681,259

5.10. Operational Area Sources

5.10.1. Hearths

5.10.1.1. Unmitigated

5.10.1.2. Mitigated

5.10.2. Architectural Coatings
Residential Interior Area Coated (sq
ft)
Residential Exterior Area Coated (sq
ft)
Non-Residential Interior Area Coated
(sq ft)
Non-Residential Exterior Area
Coated (sq ft)
Parking Area Coated (sq ft)
63180 21,060 0.00 0.00 —

5.10.3. Landscape Equipment
Season Unit Value
Snow Days day/yr 0.00
Summer Days day/yr 180275

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5.10.4. Landscape Equipment - Mitigated
Season Unit Value
Snow Days day/yr 0.00
Summer Days day/yr 180

5.11. Operational Energy Consumption

5.11.1. Unmitigated
Electricity (kWh/yr) and CO2 and CH4 and N2O and Natural Gas (kBTU/yr) Land Use Electricity (kWh/yr)CO2 CH4 N2O Natural Gas (kBTU/yr) Single Family Housing 149,428 532 0.0330 0.0040 569,029

5.11.2. Mitigated
Electricity (kWh/yr) and CO2 and CH4 and N2O and Natural Gas (kBTU/yr) Land Use Electricity (kWh/yr)CO2 CH4 N2O Natural Gas (kBTU/yr) Single Family Housing 149,428 532 0.0330 0.0040 569,029

5.12. Operational Water and Wastewater Consumption

5.12.1. Unmitigated
Land Use Indoor Water (gal/year)Outdoor Water (gal/year) Single Family Housing 650,780 4,298,297

5.12.2. Mitigated
Land Use Indoor Water (gal/year)Outdoor Water (gal/year) Single Family Housing 650,780 4,298,297
276

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5.13. Operational Waste Generation

5.13.1. Unmitigated
Land Use Waste (ton/year)Cogeneration (kWh/year)
Single Family Housing 14.7 —

5.13.2. Mitigated
Land Use Waste (ton/year)Cogeneration (kWh/year)
Single Family Housing 14.7 —

5.14. Operational Refrigeration and Air Conditioning Equipment

5.14.1. Unmitigated
Land Use Type Equipment Type Refrigerant GWP Quantity (kg)Operations Leak Rate Service Leak Rate Times Serviced Single Family Housing Average room A/C &
Other residential A/C
and heat pumps
R-410A 2,088 < 0.005 2.50 2.50 10.0
Single Family Housing Household
refrigerators and/or
freezers
R-134a 1,430 0.12 0.60 0.00 1.00

5.14.2. Mitigated
Land Use Type Equipment Type Refrigerant GWP Quantity (kg)Operations Leak Rate Service Leak Rate Times Serviced Single Family Housing Average room A/C &
Other residential A/C
and heat pumps
R-410A 2,088 < 0.005 2.50 2.50 10.0
Single Family Housing Household
refrigerators and/or
freezers
R-134a 1,430 0.12 0.60 0.00 1.00
277

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5.15. Operational Off-Road Equipment

5.15.1. Unmitigated
Equipment Type Fuel Type Engine Tier Number per Day Hours Per Day Horsepower Load Factor

5.15.2. Mitigated
Equipment Type Fuel Type Engine Tier Number per Day Hours Per Day Horsepower Load Factor

5.16. Stationary Sources

5.16.1. Emergency Generators and Fire Pumps
Equipment Type Fuel Type Number per Day Hours per Day Hours per Year Horsepower Load Factor

5.16.2. Process Boilers
Equipment Type Fuel Type Number Boiler Rating (MMBtu/hr)Daily Heat Input (MMBtu/day)Annual Heat Input (MMBtu/yr)

5.17. User Defined
Equipment Type Fuel Type

5.18. Vegetation

5.18.1. Land Use Change

5.18.1.1. Unmitigated
Vegetation Land Use Type Vegetation Soil Type Initial Acres Final Acres 278

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5.18.1.2. Mitigated
Vegetation Land Use Type Vegetation Soil Type Initial Acres Final Acres

5.18.1. Biomass Cover Type

5.18.1.1. Unmitigated
Biomass Cover Type Initial Acres Final Acres

5.18.1.2. Mitigated
Biomass Cover Type Initial Acres Final Acres

5.18.2. Sequestration

5.18.2.1. Unmitigated
Tree Type Number Electricity Saved (kWh/year)Natural Gas Saved (btu/year)

5.18.2.2. Mitigated
Tree Type Number Electricity Saved (kWh/year)Natural Gas Saved (btu/year)

6. Climate Risk Detailed Report

6.1. Climate Risk Summary
Cal-Adapt midcentury 2040–2059 average projections for four hazards are reported below for your project location. These are under Representation Concentration Pathway (RCP) 8.5 which assumes GHG emissions will continue to rise strongly through 2050 and then plateau around 2100.

Climate Hazard Result for Project Location Unit
Temperature and Extreme Heat 20.9 annual days of extreme heat Extreme Precipitation 0.85 annual days with precipitation above 20 mm279

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Sea Level Rise —meters of inundation depth
Wildfire 1.26 annual hectares burned
Temperature and Extreme Heat data are for grid cell in which your project are located. The projection is based on the 98th historical percentile of daily maximum/minimum temperatures from observed historical data (32 climate model ensemble from Cal-Adapt, 2040–2059 average under RCP 8.5). Each grid cell is 6 kilometers (km) by 6 km, or 3.7 miles (mi) by 3.7 mi.

Extreme Precipitation data are for the grid cell in which your project are located. The threshold of 20 mm is equivalent to about ¾ an inch of rain, which would be light to moderate rainfall if received over a full day or heavy rain if received over a period of 2 to 4 hours. Each grid cell is 6 kilometers (km) by 6 km, or 3.7 miles (mi) by 3.7 mi.

Sea Level Rise data are for the grid cell in which your project are located. The projections are from Radke et al. (2017), as reported in Cal-Adapt (Radke et al., 2017, CEC-500-2017-008), and consider inundation location and depth for the San Francisco Bay, the Sacramento-San Joaquin River Delta and California coast resulting different increments of sea level rise coupled with extreme storm events. Users may select from four scenarios to view the range in potential inundation depth for the grid cell. The four scenarios are: No rise, 0.5 meter, 1.0 meter, 1.41 meters Wildfire data are for the grid cell in which your project are located. The projections are from UC Davis, as reported in Cal-Adapt (2040–2059 average under RCP 8.5), and consider historical data of climate, vegetation, population density, and large (> 400 ha) fire history. Users may select from four model simulations to view the range in potential wildfire probabilities for the grid cell. The four simulations make different assumptions about expected rainfall and temperature are: Warmer/drier (HadGEM2-ES), Cooler/wetter (CNRM-CM5), Average conditions (CanESM2), Range of different rainfall and temperature possibilities (MIROC5). Each grid cell is 6 kilometers (km) by 6 km, or 3.7 miles (mi) by 3.7 mi.

6.2. Initial Climate Risk Scores
Climate Hazard Exposure Score Sensitivity Score Adaptive Capacity Score Vulnerability Score Temperature and Extreme Heat 1 0 0 N/A
Extreme Precipitation N/A N/A N/A N/A
Sea Level Rise N/A N/A N/A N/A
Wildfire N/A N/A N/A N/A
Flooding N/A N/A N/A N/A
Drought 0 0 0 N/A
Snowpack Reduction N/A N/A N/A N/A
Air Quality Degradation N/A N/A N/A N/A
The sensitivity score reflects the extent to which a project would be adversely affected by exposure to a climate hazard. Exposure is rated on a scale of 1 to 5, with a score of 5 representing the greatest exposure.

The adaptive capacity of a project refers to its ability to manage and reduce vulnerabilities from projected climate hazards. Adaptive capacity is rated on a scale of 1 to 5, with a score of 5 representing the greatest ability to adapt.

The overall vulnerability scores are calculated based on the potential impacts and adaptive capacity assessments for each hazard. Scores do not include implementation of climate risk reduction measures.

6.3. Adjusted Climate Risk Scores
Climate Hazard Exposure Score Sensitivity Score Adaptive Capacity Score Vulnerability Score Temperature and Extreme Heat 1 1 1 2280

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Extreme Precipitation N/A N/A N/A N/A
Sea Level Rise N/A N/A N/A N/A
Wildfire N/A N/A N/A N/A
Flooding N/A N/A N/A N/A
Drought 1 1 1 2
Snowpack Reduction N/A N/A N/A N/A
Air Quality Degradation N/A N/A N/A N/A
The sensitivity score reflects the extent to which a project would be adversely affected by exposure to a climate hazard. Exposure is rated on a scale of 1 to 5, with a score of 5 representing the greatest exposure.

The overall vulnerability scores are calculated based on the potential impacts and adaptive capacity assessments for each hazard. Scores include implementation of climate risk reduction measures.

6.4. Climate Risk Reduction Measures

7. Health and Equity Details

7.1. CalEnviroScreen 4.0 Scores
The maximum CalEnviroScreen score is 100. A high score (i.e., greater than 50) reflects a higher pollution burden compared to other census tracts in the state.

Indicator Result for Project Census Tract
Exposure Indicators —
AQ-Ozone 88.7
AQ-PM 6.45
AQ-DPM 10.4
Drinking Water 48.5
Lead Risk Housing 15.5
Pesticides 12.6
Toxic Releases 2.00
Traffic 71.1
Effect Indicators —281

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CleanUp Sites 0.00
Groundwater 0.00
Haz Waste Facilities/Generators 8.76
Impaired Water Bodies 0.00
Solid Waste 0.00
Sensitive Population —
Asthma 22.9
Cardio-vascular 19.9
Low Birth Weights 45.9
Socioeconomic Factor Indicators —
Education 38.1
Housing 60.9
Linguistic 24.8
Poverty 52.4
Unemployment 52.5

7.2. Healthy Places Index Scores
The maximum Health Places Index score is 100. A high score (i.e., greater than 50) reflects healthier community conditions compared to other census tracts in the state.

Indicator Result for Project Census Tract
Economic —
Above Poverty 47.69665084
Employed 6.274862056
Median HI 34.1973566
Education —
Bachelor's or higher 60.87514436
High school enrollment 100
Preschool enrollment 83.27986655
Transportation —282

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Auto Access 58.83485179
Active commuting 32.27255229
Social —
2-parent households 87.34761966
Voting 71.03811113
Neighborhood —
Alcohol availability 85.0891826
Park access 27.34505325
Retail density 44.12934685
Supermarket access 31.64378288
Tree canopy 18.95290645
Housing —
Homeownership 53.93301681
Housing habitability 71.28191967
Low-inc homeowner severe housing cost burden 68.00975234 Low-inc renter severe housing cost burden 44.18067496
Uncrowded housing 84.29359682
Health Outcomes —
Insured adults 32.06723983
Arthritis 0.0
Asthma ER Admissions 85.4
High Blood Pressure 0.0
Cancer (excluding skin)0.0
Asthma 0.0
Coronary Heart Disease 0.0
Chronic Obstructive Pulmonary Disease 0.0
Diagnosed Diabetes 0.0
Life Expectancy at Birth 42.3283

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Cognitively Disabled 48.3
Physically Disabled 38.4
Heart Attack ER Admissions 75.7
Mental Health Not Good 0.0
Chronic Kidney Disease 0.0
Obesity 0.0
Pedestrian Injuries 92.9
Physical Health Not Good 0.0
Stroke 0.0
Health Risk Behaviors —
Binge Drinking 0.0
Current Smoker 0.0
No Leisure Time for Physical Activity 0.0
Climate Change Exposures —
Wildfire Risk 0.0
SLR Inundation Area 0.0
Children 97.3
Elderly 1.5
English Speaking 79.2
Foreign-born 26.9
Outdoor Workers 71.4
Climate Change Adaptive Capacity —
Impervious Surface Cover 51.4
Traffic Density 35.3
Traffic Access 23.0
Other Indices —
Hardship 37.1
Other Decision Support —284

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2016 Voting 89.4

7.3. Overall Health & Equity Scores
Metric Result for Project Census Tract
CalEnviroScreen 4.0 Score for Project Location (a)14.0
Healthy Places Index Score for Project Location (b)47.0 Project Located in a Designated Disadvantaged Community (Senate Bill 535)No Project Located in a Low-Income Community (Assembly Bill 1550)No Project Located in a Community Air Protection Program Community (Assembly Bill 617) No a: The maximum CalEnviroScreen score is 100. A high score (i.e., greater than 50) reflects a higher pollution burden compared to other census tracts in the state. b: The maximum Health Places Index score is 100. A high score (i.e., greater than 50) reflects healthier community conditions compared to other census tracts in the state.

7.4. Health & Equity Measures
No Health & Equity Measures selected.

7.5. Evaluation Scorecard
Health & Equity Evaluation Scorecard not completed.

7.6. Health & Equity Custom Measures
No Health & Equity Custom Measures created.

8. User Changes to Default Data
Screen Justification
Land Use The lot acreage is 19.81 acres
Operations: Hearths No hearths will be used
285

GENERAL BIOLOGICAL

RESOURCES ASSESSMENT

RANCHO MIRAGE, RIVERSIDE COUNTY, CALIFORNIA
(Township 5 South, Range 5 East, Section 2)
APN: 689-090-003, 689-130-004, -005, -012, -014, -017 & 689-140-022
Prepared for:

Horti Caesaris, LLC
9401 Wilshire Blvd., 9th Floor
Beverly Hills, CA 90212
Prepared by:

RCA Associates, Inc.
15555 Main Street, #D4-235
Hesperia, California 92345
(760) 596-0017
Principal Investigators:

Ryan Hunter, Senior Environmental Scientist/Biologist
Brian Bunyi, Environmental Scientist/Wildlife Biologist Project: #2023-1187 BA
March 3, 2023

APPENDIX B
286
RCA
~
ASSOCIATES.INC

TITLE PAGE
Date Report Written: March 3, 2024
Date Field Work Completed: February 12, 2024
Report Title: General Biological Resources Assessment
Project Location: Rancho Mirage, California
APN: 689-090-003,
689-130-004, -005, -012,-014, -017 &
689-140-022
Prepared for: Horti Caesaris, LLC
9401 Wilshire Blvd., 9th Floor
Beverly Hills, CA 90212
Principal Investigators: Ryan Hunter, Senior Environmental Scientist/Biologist Brian Bunyi, Environmental Scientist/Wildlife Biologist Contact Information: Randall C. Arnold, Jr.

RCA Associates, Inc.
15555 Main Street, #D4-235
Hesperia, California 92345
(760) 596-0017
[email protected]
www.rcaassociatesllc.com
Ryan D. Hunter
RCA Associates, Inc.
15555 Main Street, #D4-235
Hesperia, CA 92345
(760) 998-9165
[email protected]
www.rcaassociatesllc.com
287

Table of Contents

1.0 INTRODUCTION AND SUMMARY ................................................................................ 1

2.0 EXISTING CONDITIONS .................................................................................................. 2

3.0 METHODOLOGIES ........................................................................................................... 4

4.0 LITERATURE SEARCH .................................................................................................... 5

5.0 RESULTS ............................................................................................................................ 8

5.1 General Biological Resources .......................................................................................... 8

5.2 Federal and State Listed Species ...................................................................................... 9

5.3 Species of Special Concern .............................................................................................. 9

5.4 Jurisdictional Waters and Riparian Habitat ...................................................................... 9

5.5 Protected Plants .............................................................................................................. 10

6.0 IMPACTS AND MITIGATION MEASURES ................................................................. 11

6.1 General Biological Resources ........................................................................................ 11

6.2 Federal and State Listed and Species of Special Concern ............................................. 11

7.0 CONCLUSIONS AND CONSIDERATIONS .................................................................. 12

8.0 BIBLIOGRAPHY .............................................................................................................. 13 CERTIFICATION ........................................................................................................................ 15 Appendix A – Tables and Figures

REGULATORY CONTEXT
288

GENERAL BIOLOGICAL ASSESSMENT 1 MARCH 2024

1.0 INTRODUCTION AND SUMMARY
Biological surveys were conducted on a 19.8-acre parcel (Approximate), located north of the intersection of Mirage Cove Dr. and Peterson Rd. in the City of Rancho Mirage, California (Township 5 South, Range 5 East, Section 2, USGS Cathedral City, California Quadrangle, 1956) (Figures 1 and 2). The property is located in an area zoned for residential usage in Rancho Mirage, California.

As part of the environmental process, California Department of Fish and Wildlife (CDFW) and U.S. Fish and Wildlife Service (USFWS) data sources were reviewed. Following the data review, surveys were performed on the site on October 4, 2022, during which the biological resources on the site and in the surrounding areas were documented by biologists from RCA Associates, Inc.

As part of the surveys, the property and adjoining areas were evaluated for the presence of native habitats which may support populations of sensitive wildlife species. The property was also evaluated for the presence of sensitive habitats including wetlands, vernal pools, riparian habitats, and jurisdictional areas.

Habitat assessments were also conducted for the desert tortoise and burrowing owl. Based on data from USFWS, CDFW, and a search of the California Natural Diversity Database (CNDDB, 2022).

Scientific nomenclature for this report is based on the following references: Hickman (1993), Munz (1974), Stebbins (2003), Sibley (2016) and Whitaker (1980). 289

GENERAL BIOLOGICAL ASSESSMENT 2 MARCH 2024

2.0 EXISTING CONDITIONS
The property is approximately 19.8-acres and is located north of the intersection of Mirage Cove Dr. and Peterson Rd. in the City of Rancho Mirage, California. The site is located in Section 2, Township 5 South, Range 5 East (USGS Cathedral City, CA 7.5-minute quadrangle) (Figures 1 and 2). Vacant land surrounds the property in the north, east and west while a community of homes lines the southern border of the property.

The relatively flat site is approximately 131 meters above sea level and contains no slope. The vegetation community present on site supports a disturbed desert scrub habitat encompassing mainly native plants and some non-native grasses. The site contains a few species of plant which include kelch grass (Schismus barbatus), creosote bush (Larrea tridentata), Four winged saltbush (Atriplex canescens), Asian mustard (Brassica tournefortii), Nettle leaved goosefoot (Chenopodiastrum murale) and Brittlebush (Encelia farinosa). Section 5.0 provides a more detailed discussion of the various plant species observed during the surveys.

The site supports a minimal amount of wildlife, with many of them being birds. Species that were not observed, but are expected to occur on site given their abundance in the surrounding areas include California ground squirrel (Otospermophilus beecheyi) and antelope ground squirrel (Ammospermophilus leucurus).

Birds observed included common ravens (Corvus corax), house finch (Carpodacus mexicanus), house sparrow (Passer domesticus), Anna’s hummingbird (Calypte anna), red-tailed hawk (Buteo jamaicensis), Northern mockingbird (Mimus polyglottos) and rock pigeon (Columba livia).

Section 5.0 provides a more detailed discussion of the various species observed during the surveys.

No reptiles were observed during the field investigation, however there were a number of reptile tracks along the property and we can assume that they are present in the area. Species that are expected to occur on site include the western whiptail lizard (Cnemidophorus tigris) and common side-blotched lizard (Uta stansburiana). Table 2 provides a compendium of wildlife species.

There were no observations that indicated that a potential channel is present on the site. It is the opinion of RCA Associates, Inc. that no additional surveys will be required at this time. 290

GENERAL BIOLOGICAL ASSESSMENT 3 MARCH 2024
In addition, no sensitive habitats (e.g., sensitive species, critical habitats, etc.) have been documented in the immediate area according to the CNDDB (2024) and none were observed during the field investigations.
291

GENERAL BIOLOGICAL ASSESSMENT 4 MARCH 2024

3.0 METHODOLOGIES
General biological surveys were conducted on February 12, 2024, during which biologists from RCA Associates, Inc. initially walked meandering transects throughout the property. During the surveys, data was collected on the plant and animal species present on the site. All plants and animals detected during the surveys were recorded and are provided in Tables 1 & 2 (Appendix A). The property was also evaluated for the presence of habitats which might support sensitive species. Scientific nomenclature for this report is based on the following references: Hickman (1993), Munz (1974), Stebbins (2003), Sibley (2016) and Whitaker (1980). Following completion of the initial reconnaissance survey, habitat assessments were conducted for the burrowing owl.

Weather conditions consisted of wind speeds of 0 to 5 mph, temperatures in the low to mid 70’s (°F) (AM), and 0% cloud cover. The applicable methodologies are summarized below.

General Plant and Animal Surveys: Meandering transects were walked on the site and in surrounding areas (i.e., the zone of influence) where accessible at a pace that allowed for careful documentation of the plant and animal species present on the site. All plants observed were identified in the field or sampled and brought back for further identification. Wildlife was identified through visual observations and/or by vocalizations. Habitat assessments were conducted for the burrowing owl. Tables 1 and 2 (Appendix A) provides a comprehensive compendium of the various plant and animal; species observed during the field investigations. 292

GENERAL BIOLOGICAL ASSESSMENT 5 MARCH 2024

4.0 LITERATURE SEARCH
As part of the environmental process, a search of the California Natural Diversity Database (CNDDB) search was performed. Based on this review, it was determined that sixteen special status species have been documented within the Cathedral City quad of the property. The following tables provide data on each special status species which has been documented in the area.

Table 4-1: Federal and State Listed Species and State Species of Special Concern.

E = Endangered; T = Threatened; SSC = Species of special concern; CNPS = California Native Plant Society; CNDDB = California Natural Diversity Data Base

NAME STATUS HABITAT

REQUIREMENTS

PRESENCE/

ABSENCE ON PROPERTY
Plant Species
Within Cathedral City Quadrangle
Chaparral sand-verbena
(Abronia villosa var. aurita)
Federal: None
State: None
CNPS: 1B.1
Desert Scrub The site supports minimal suitable
habitat for the species; and none were
observed during field surveys.

Horn’s milk-vetch
(Diplacus mohavensis)
Federal: None
State: None
CNPS: 1B.1
Alkali Sink, wetland-riparian Site does not support minimum suitable habitat for the species; and no
species were observed during the field
survey.

Coachella Valley milk-vetch
(Astragalus lentiginosus var.
coachellae)
Federal: Endangered
State: None
CNPS: 1B.2
Creosote Bush Scrub The site does not support minimum
suitable habitat for the species; and
none were observed during field
surveys.

Arizona spurge
(Euphorbia arizonica)
Federal: None
State: None
CNPS: 2B.3
Desert Habitat with compact
soils
The site does not support minimum
suitable habitat for the species; and
none were observed during field
surveys.

Flat-seeded spurge
(Euphorbia platysperma)
Federal: None
State: None
CNPS: 1B.2
Creosote Bush Scrub The site does not support minimum
suitable habitat for the species; and
none were observed during field
surveys.

Slender cottonheads
(Nemacaulis denudata var.
gracilis)
Federal: None
State: None
CNPS: 2B.2
Dunes and sandy areas The site does support minimum
suitable habitat for the species;
however none were observed during
field surveys.
293

GENERAL BIOLOGICAL ASSESSMENT 6 MARCH 2024
Desert spike-moss
(Selaginella eremophila)
Federal: None
State: None
CNPS: 2B.2
Rocky and sandy slopes, in
open rock or crevices, on rock
or terrestrial.

The site does not support minimum
suitable habitat for the species; and
none were observed during field
surveys.

Purple stemodia
(Stemodia durantifolia)
Federal: None
State: None
CNPS: 2B.1
wetland-riparian The site does not support minimum
suitable habitat for the species; and
none were observed during field
surveys.

Notes:

Status abbreviations:

CNPS List 1A: Plants presumed extirpated in California and either rare or extinct elsewhere CNPS List 1B: Plants rare, threatened, or endangered in California and elsewhere CNPS List 2A: Plants presumed extirpated in California, but more common somewhere else CNPS List 2B: Plants rare, threatened, or endangered in California, but more common somewhere else
CNPS List 3: Plants about which more information is needed - a review list CNPS List 4: Plants of limited distribution - a watch list .1 Seriously threatened in California (over 80% of occurrences threatened/ high degree and immediacy of threat)
.2 Moderately threatened in California (20-80% occurrences threatened/ moderate degree and immediacy of threat)
.3 No very threatened in California (<20% of occurrences threatened/ low degree and immediacy of threat or no current threats known)

NAME STATUS HABITAT

REQUIREMENTS

PRESENCE/

ABSENCE ON PROPERTY
Wildlife Species
Within Cathedral City Quadrangle
Western yellow bat (Lasiurus
xanthinus)
Federal: None
State: None
CDFW: SSC
Riparian woodland The site does not support minimum
suitable habitat for the species; and
none were observed during field
surveys.

Burrowing owl (Athene
cunicularia)
Federal: None
State: None
CDFW: SSC
Grasslands and desert habitats The site does not support minimal suitable habitat for the species and no
owls or owl sign, or suitable burrows,
were observed during field surveys.

Casey’s June beetle
(Dinacoma caseyi)
Federal: Endangered
State: None
Alluvial habitat The site does not support minimum
suitable habitat for the species; and
none were observed during field
surveys.
294

GENERAL BIOLOGICAL ASSESSMENT 7 MARCH 2024
Flat-tailed horned lizard
(Phrynosoma mcallii)
Federal: None
State: None
CDFW: SSC
Sandy desert hardpan or
gravel flats
The site does not support minimum
suitable habitat for the species; and
none were observed during field
surveys.

Le Conte’s thrasher (Toxostoma
lecontei)
Federal: None
State: None
CDFW: SSC
Desert scrub The site does not support minimum
suitable habitat for the species; and
none were observed during field
surveys.

Coastal California gnatcatcher
(Polioptila californica
californica)
Federal: Threatened
State: None
CDFW: SSC
Coastal sage scrub The site does not support minimum
suitable habitat for the species; and
none were observed during field
surveys.

Coachella Valley fringe-toed
lizard
(Uma inornate)
Federal: Threatened
State: Endangered
Sandy desert habitat The site does support minimum
suitable habitat for the species;
However, none were observed during
field surveys.

Palm Springs round-tailed
ground squirrel
(Xerospermophilus tereticaudus
chlorus)
Federal: None
State: None
CDFW: SSC
Desert succulent shrub, desert
wash, desert scrub, alkali
desert scrub, and levees in
cropland habitat.

The site does not support minimum
suitable habitat for the species; and
none were observed during field
surveys.
295

GENERAL BIOLOGICAL ASSESSMENT 8 MARCH 2024

5.0 RESULTS

5.1 General Biological Resources
The site supports a disturbed desert scrub community which sparsely covers the property (Figure 3). Species present on the site included kelch grass (Schismus barbatus), creosote bush (Larrea tridentata), Four-winged saltbush (Atriplex canescens), Asian mustard (Brassica tournefortii), Nettle leaved goosefoot (Chenopodiastrum murale) and Brittlebush (Encelia farinosa). Table 1 provides a compendium of all plants occurring on the site and/or in the immediate surrounding area.

Section 5.0 provides a more detailed discussion of the various species observed during the surveys.

Table 2 provides a complete compendium of wildlife species occurring on site or in the surrounding area.

No mammals were seen during the February 2024 survey. Although the Antelope Ground squirrel (Ammospermophilus leucurus) were not present during the field investigation we can assume they are in the area due to current conditions and population distributions. Other wildlife species that may occur on site include desert cottontails (Sylvilagus audubonii) and California ground squirrels (Otospermophilus beecheyi), and Merriam’s kangaroo rats (Dipodomys merriami) may also occur on the site given their wide-spread distribution in the region. Tables 1 and 2 (Appendix A) provides a compendium of the various plant and animal species identified during the field investigations and those common to the area. No distinct wildlife corridors were identified on the site or in the immediate area.

No reptiles were observed on site during the February 2024 field investigations. However, some reptiles that may inhabit the site include the Western Whiptail Lizard (Cnemidophorus tigris) and Side-blotched lizard (Uta stansburiana).

No sensitive habitats (e.g., wetlands, vernal pools, critical habitats for sensitive species, etc.) were observed on the site during the field investigations.
296

GENERAL BIOLOGICAL ASSESSMENT 9 MARCH 2024
The following are the listed and special status species that have the ability to occur on the project site. It is not a comprehensive list of all the species in the quad. This information has been taken from the California Natural Diversity Database and is using the most current version.

5.2 Federal and State Listed Species
Coachella Valley fringed-toed lizard: The site is located within the documented Coachella Valley fringed-toed lizard range, a state and federal threatened species, according to CNDDB (2024). The property supports minimal suitable habitat for the lizard based on the location of the site in a developed area of Rancho Mirage. No Coachella Valley fringed-toed lizard was observed anywhere within the property boundaries during the February 12, 2024 surveys. The species is not expected to move onto the site in the near future based on the absence of any recent observations in the immediate area, and the presence of busy roadways and developments in the immediate area which may act as barriers to migration.

5.3 Species of Special Concern
Burrowing Owl: The site is located within documented burrowing owl habitat according to CNDDB (2024). No owls were seen on the property during the survey, and minimal suitable habitat was observed. Burrowing owls are not expected to occur on the site due to lack of suitable vegetation and burrows.

Le Conte’s thrasher: Le Conte’s thrashers have not been recently observed in the area according to CNDDB (2024). Thrashers are not expected to occur on the site due to lack of critical vegetation used by the species, such as catclaw acacia. Thrashers may be very infrequent in the area given the low population levels in the region as well as the lack of any recent sightings according to the CNDDB.

5.4 Jurisdictional Waters and Riparian Habitat
No riparian vegetation (e.g., cottonwoods, willows, etc.) exist on the site. No potential channels were observed on the property and it is the opinion of RCA Associates that no further surveys will be necessary.
297

GENERAL BIOLOGICAL ASSESSMENT 10 MARCH 2024

5.5 Protected Plants
There were no instances of any federally or state endangered plant species during the field survey conducted on February 12, 2024. The site has been disturbed in the past and development has occurred around most of the neighboring properties. Although the site does contain minimal habitat for the Chapparal sand verbena (Abronia villosa var. aurita) and the Slender cottonhead (Nemacaulis denudata var. gracilis) which include sandy areas and desert scrub, the species were not observed during the February 2024 field survey.
298

GENERAL BIOLOGICAL ASSESSMENT 11 MARCH 2024

6.0 IMPACTS AND MITIGATION MEASURES

6.1 General Biological Resources
Future development of the site will impact the general biological resources present on site, because most if not all of the vegetation will be removed during future construction activities. The site is expected to support very few wildlife species which will be impacted by development activities.

Those species with limited mobility (i.e., small mammals and reptiles) will experience increases in mortality during the construction phase. However, more mobile species (i.e., birds, large mammals) will be displaced into adjacent areas and will likely experience minimal impacts.

Therefore, loss of about 19.8-acres of a relatively disturbed desert scrub habitat is not expected to have a significant cumulative impact on the overall biological resources in the region given the presence of similar habitat throughout the surrounding area. No sensitive habitats (e.g., wetlands, vernal pools, critical habitats for sensitive species, etc.) were observed on the site during the field investigations.

6.2 Federal and State Listed and Species of Special Concern No federal or State-listed species were observed on the site during the field investigations. In addition, there are no documented observations of these species either on the site or in the immediate area. The site is not expected to support populations of the desert tortoise based on the absence of habitat, suitable burrows, or signs.

A pre-construction burrowing owl survey may be required by CDFW to determine if any owls have moved on to the site since the February 12, 2024 surveys. As stated in CDFW’s Staff Report on Burrowing Owl Mitigation, the most effective method of completing a pre-construction survey (take avoidance survey) should be performed within 30 days of ground disturbance, followed by a final pre-construction survey within 24 hours of breaking ground. 299

GENERAL BIOLOGICAL ASSESSMENT 12 MARCH 2024

7.0 CONCLUSIONS AND CONSIDERATIONS
Future development activities include the grading and removal of all vegetation from the 19.8-acre parcel; however, cumulative impacts to the general biological resources (plants and animals) in the surrounding area are expected to be negligible. This assumption is based on the habitat containing scarce vegetation of non-native species. As discussed above, the site does not support any burrowing owls due to the lack of suitable habitat and potential burrows. Joshua trees (a state candidate species) were not observed in the field investigations during February 2024 survey. The following mitigation measures should be considered:

1.Pre-construction surveys for burrowing owls and nesting birds protected under the Migratory Bird Treaty Act and Section 3503 of the California Fish and Wildlife Code shall be conducted prior to the commencement of Project-related ground disturbance. a.Appropriate survey methods and timeframes shall be established, to ensure that chances of detecting the target species are maximized. In the event that listed species, such as the desert tortoise, are encountered, authorization from the USFWS and CDFW must be obtained. If nesting birds are detected, avoidance measures shall be implemented to ensure that nests are not disturbed until after young have fledged.
b.Pre-construction surveys shall encompass all areas within the potential footprint of disturbance for the project, as well as a reasonable buffer around these areas.

2.A focused plant survey should be considered for all special status plant species that have the potential to occur on the site to be performed during the blooming season (April - June) to determine the potential environmental effects of the proposed projects on special status plants and sensitive natural communities following recommended protocols by the Department of Fish and Wildlife.

If any sensitive species are observed on the property during future activities, CDFW and USFWS (as applicable) should be contacted to discuss specific mitigation measures which may be required for the individual species. CDFW and USFWS are the only agencies which can grant authorization for the “take” of any sensitive species and can approve the implementation of any applicable mitigation measures.
300

GENERAL BIOLOGICAL ASSESSMENT 13 MARCH 2024

8.0 BIBLIOGRAPHY
Baldwin, Bruce G, et. al.
2002. The Jepson Desert Manual. Vascular Plants of Southeastern California.

University of California Press, Berkeley, CA.

Bureau of Land Management
January 2005. Final Environmental Impact Report and Statement for the West Mojave Plan. Vol. 1A.

California Burrowing Owl Consortium
1993. Burrowing Owl Survey Protocol and Mitigation Guidelines.

California Department of Fish and Game
1990. California Wildlife: Volume 1 (Amphibians and Reptiles), Volume II (Birds), and Volume III (Mammals).

California Department of Fish and Game
2014. Rarefind 3 Natural Diversity Database. Habitat and Data Analysis Branch.

Sacramento, CA.

California Department of Fish and Game
March 7, 2013. Staff Report on Burrowing Owl Mitigation. 34 pp.

California Native Plant Society
2001. Inventory of Rare and Endangered Plants of California (sixth edition). Rare Plant Scientific Advisory Committee, David P. Tibor, Convening Editor. California Native Plant Society. Sacramento, CA x + 388 pp.

Ehrlich, P., Dobkin., Wheye, D.

Birder’s Handbook. A Field Guide to the Natural History of North American Birds.

Simon & Schuster Building Rockefeller Center 1230 Avenue of the Americas. New York, New York 10020.

Hickman, James C.

The Jepson Manual Higher Plants of California. University of California Press.

Berkeley, CA. 3rd Edition. 1996.

Jaeger, Edmund C.
1969. Desert Wild Flowers. Stanford University Press, Stanford, California. 321 pp.

Kays, R. W. & Wilson, D. E.

Mammals of North America. Princeton University Press, Princeton, New Jersey. 2002.

Munz, Philip A.
1974. A Flora of Southern California. University of California Press, Berkeley, California. 1086 pp.
301

GENERAL BIOLOGICAL ASSESSMENT 14 MARCH 2024
Tugel, Arlene J., Woodruff, George A.

Soil Conservation Service, 1978. Soil Survey of San Bernardino County California, Mojave River Area.

Sibley, David Allen.

Sibley Birds West: Field Guide to Birds of Western North America. Knopf. 2016 Stebbins, Robert C.

A Field Guide to Western Reptiles and Amphibians. Houghton Mifflin Company. 2003.

U.S. Fish and Wildlife Service
2010 Desert Tortoise Survey Protocol.

Whitaker, John O.

The Audubon Society Field Guide to North American Mammals. Alfred A Knopf, Inc. 1980.
302

GENERAL BIOLOGICAL ASSESSMENT 15 MARCH 2024

CERTIFICATION
I hereby certify that the statements furnished above and in the attached exhibits, presents the data and information required for this biological evaluation, and that the facts, statements, and information presented are true and correct to the best of my knowledge and belief. Fieldwork conducted for this assessment was performed by Ryan Hunter and Brian Bunyi. I certify that I have not signed a non-disclosure or consultant confidentiality agreement with the project applicant or applicant’s representative and that I have no financial interest in the project.

Date: ___3/3/2024________ Signed: Ryan Hunter Brian Bunyi
Field Work Performed By: Ryan Hunter______
Senior Environmental Scientist/Biologist
Field Work Performed By: Brian Bunyi_____ _ Environmental Scientist/Wildlife Biologist
303

Appendix A
Tables and Figures
304

Project Boundary
Legend
Figure 1: Regional
Exhibit
Produced By: RCA Associates Inc.

North of the Intersection of
Mirage Cove Dr. and Peterson
Rd. in Rancho Mirage, CA.

Uinta SoftwareSource:

19.8-Acres
(Approximately)Acreage:
2023-187Project #:305
RCA
»> «<
ASSOCIHES .IHC

Project Boundary
Legend
Figure 2: Vicinity Exhibit
Produced By: RCA Associates Inc.

North of the Intersection of
Mirage Cove Dr. and Peterson
Rd. in Rancho Mirage, CA.

Uinta SoftwareSource:

19.8-Acres
(Approximately)Acreage:
2023-187Project #:306
RCA
»> «<
ASSOCIHES .IHC

FIGURE 3: PHOTOGRAPHS OF SITE

CENTER OF SITE LOOKING NORTH

CENTER OF SITE LOOKING EAST
307

FIGURE 3, cont: PHOTOGRAPHS OF SITE

CENTER OF SITE LOOKING SOUTH

CENTER OF SITE LOOKING WEST
308

Table 1 - Plants observed on the site and known to occur in the immediate surrounding area.

Common Name Scientific Name Location
Asian mustard Brassica tournefortii On Site and in the surrounding area.

Mexican fan palm Washingtonia robusta “
Creosote bush Larrea tridentata “
Four-winged saltbush Atriplex canescens “
Desert pala fox Palafoxia arida var. arida “
Athel tamarisk Tamarix aphylla “
Cheatgrass Bromus tectorum “
Cheeseweed Malva parviflora “
Tumbleweed Kali tragus var. tragus “
Desert Indian wheat Plantago ovata “
Nettle leaved goosefoot Chenopodiastrum murale “
Flatspine bur ragweed Ambrosia acanthicarpa “
Western tansy mustard Descurainia pinnata “
Jerusalem thorn Parkinsonia aculeata “
Desert tobacco Nicotiana obtusifolia “
Common burrobrush Ambrosia salsola “
Kelch grass Schismus barbatus “
Note: The above list is not intended to be a comprehensive list of every plant which may occur on the site or in the zone of influence.
309

Table 2 - Wildlife observed on the site during the field investigations.

Common Name Scientific Name Location
Common raven Corvus corax On-site and in the surrounding area.

House finch Carpodacus mexicanus “
Rock pigeon Columba livia “
House sparrow Passer domesticus “
Northern mockingbird Mimus polyglottos “
Cassin’s kingbird Tyrannus vociferans “
Mourning Dove Zenaida macroura “
Anna’s hummingbird Calypte anna “
Red-Tailed Hawk Buteo jamaicensis “
Note: The above Table is not a comprehensive list of every animal species which may occur in the area, but is a list of those common species which were identified on the site or which have been observed in the region by biologists from RCA Associates, Inc.
310

REGULATORY CONTEXT
The following provides a summary of federal and state regulatory jurisdiction over biological and wetland resources. Although most of these regulations do not directly apply to the site, given the general lack of sensitive resources, they provide important background information.

Federal Endangered Species Act
The USFWS has jurisdiction over federally listed threatened and endangered plant and animal species. The federal Endangered Species Act (ESA) and its implementing regulations prohibit the take of any fish or wildlife species that is federally listed as threatened or endangered without prior approval pursuant to either Section 7 or Section 10 of the ESA. ESA defines “take” as “harass, harm, pursue, hunt, shoot, wound, kill, trap, capture, or collect, or to attempt to engage in any such conduct.” Federal regulation 50CFR17.3 defines the term “harass” as an intentional or negligent act that creates the likelihood of injuring wildlife by annoying it to such an extent as to significantly disrupt normal behavior patterns such as breeding, feeding, or sheltering (50CFR17.3).

Furthermore, federal regulation 50CFR17.3 defines “harm” as an act that either kills or injures a listed species. By definition, “harm” includes habitat modification or degradation that actually kills or injures a listed species by significantly impairing essential behavior patterns such as breeding, spawning, rearing, migrating, feeding, or sheltering (50CFR217.12).

Section10(a) of the ESA establishes a process for obtaining an incidental take permit that authorizes non federal entities to incidentally take federally listed wildlife or fish. Incidental take is defined by ESA as take that is “incidental to, and not the purpose of, the carrying out of another wise lawful activity.” Preparation of a habitat conservation plan, generally referred to as an HCP, is required for all Section 10(a) permit applications. The USFWS and National Oceanic and Atmospheric Administration’s National Marine Fisheries Service (NOAA Fisheries Service) have joint authority under the ESA for administering the incidental take program. NOAA Fisheries Service has jurisdiction over anadromous fish species and USFWS has jurisdiction over all other fish and wildlife species.

Section 7 of the ESA requires all federal agencies to ensure that any action they authorize, fund, or carry out is not likely to jeopardize the continued existence of any species listed under the ESA, or result in the destruction or adverse modification of its habitat. Federal agencies are also required 311

to minimize impacts to all listed species resulting from their actions, including issuance or permits or funding. Section 7 requires consideration of the indirect effects of a project, effects on federally listed plants, and effects on critical habitat (ESA requires that the USFWS identify critical habitat to the maximum extent that it is prudent and determinable when a species is listed as threatened or endangered). This consultation results in a Biological Opinion prepared by the USFWS stating whether implementation of the HCP will result in jeopardy to any HCP Covered Species or will adversely modify critical habitat and the measures necessary to avoid or minimize effects to listed species.

Although federally listed animals are legally protected from harm no matter where they occur, section 9 of the ESA provides protection for endangered plants by prohibiting the malicious destruction on federal land and other “take” that violates State law. Protection for plants not living on federal lands is provided by the California Endangered Species Act.

California Endangered Species Act
CDFW has jurisdiction over species listed as threatened or endangered under Section 2080 of the California Fish and Wildlife Code. Section 2080 prohibits the take of a species listed by CDFW as threatened or endangered. The state definition of take is similar to the federal definition, except that Section 2080 does not prohibit indirect harm to listed species by way of habitat modification.

To qualify as take under the state ESA, an action must have direct, demonstrable detrimental effect on individuals of the species. Impacts on habitat that may ultimately result in effects on individuals are not considered take under the state ESA but can be considered take under the federal ESA.

Proponents of a project affecting a state-listed species must consult with CDFW and enter into a management agreement and take permit under Section 2081. The state ESA consultation process is similar to the federal process. California ESA does not require preparation of a state biological assessment; the federal biological assessment and the CEQA analysis or any other relevant information can provide the basis for consultation. California ESA requires that CDFW coordinate consultation for joint federally listed and state-listed species to the extent possible; generally, the state opinion for the listed species is brief and references provisions under the federal opinion. 312

Clean Water Act, Section 404
The COE and the U.S. Environmental Protection Agency regulate the placement of dredged or fill material into “Waters of the United States” under Section 404 of the Clean Water Act. Waters of the United States include lakes, rivers, streams, and their tributaries, and wetlands. Wetlands are defined for regulatory purposes as “areas inundated or saturated by surface or groundwater at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions” (33 Code of Federal Regulations [CFR] 328.3, 40 CFR 230.3).

The COE may issue either individual permits on a case-by-case basis or general permits on a program level. General permits are pre-authorized and are issued to cover similar activities that are expected to cause only minimal adverse environmental effects. Nationwide permits (NWP’s) are general permits issued to cover particular fill activities. All NWP’s have general conditions that must be met for the permits to apply to a particular project, as well as specific conditions that apply to each NWP.

Clean Water Act, Section 401
Section 401 of the Clean Water Act requires water quality certification and authorization of placement of dredged or fill material in wetlands and Other Waters of the United States. In accordance with Section 401 of the Clean Water Act, criteria for allowable discharges into surface waters have been developed by the State Water Resources Control Board, Division of Water Quality. As such, proponents of any new project which may impair water quality as a result of the project are required to create a post construction stormwater management plan to ensure offsite water quality is not degraded. The resulting requirements are used as criteria in granting National Pollution Discharge Elimination System (NPDES) permits or waivers, which are obtained through the Central Valley Regional Water Quality Control Board (RWQCB). Any activity or facility that will discharge waste (such as soils from construction) into surface waters, or from which waste may be discharged, must obtain an NPDES permit or waiver from the RWQCB. The RWQCB evaluates an NPDES permit application to determine whether the proposed discharge is consistent with the adopted water quality objectives of the basin plan.

313

California Fish and Wildlife Code, Sections 1600-1616
Under the California Fish and Wildlife Code, Sections 1600-1616 CDFW regulates projects that divert, obstruct, or change the natural flow or bed, channel, or bank of any river, stream, or lake.

Proponents of such projects must notify CDFW and enter into a streambed alteration agreement with them.

Section 1602 of the California Fish and Wildlife Code requires a state or local government agency, public utility, or private entity to notify CDFW before it begins a construction project that will: (1) divert, obstruct, or change the natural flow or the bed, bank, channel, or bank of any river, stream, or lake; (2) use materials from a streambed; or (3) result in the disposal or deposition of debris, waste, or other material containing crumbled, flaked, or ground pavement where it can pass into any river, stream, or lake. Once the notification is filed and determined to be complete, CDFW issues a streambed alteration agreement that contains conditions for construction and operations of the proposed project.

California Fish and Wildlife Code, Section 3503.5
Under the California Fish and Wildlife Code, Section 3503.5, it is unlawful to take, possess, or destroy any birds in the order Falconiformes (hawks, eagles, and falcons) or Strigiformes (owls).

Take would include the disturbance of an active nest resulting in the abandonment or loss of young.

Migratory Bird Treaty Act
The federal Migratory Bird Treaty Act (MBTA) prohibits the taking, hunting, killing, selling, purchasing, etc. of migratory birds, parts of migratory birds, or their eggs and nests. As used in the MBTA, the term “take” is defined as “to pursue, hunt, shoot, capture, collect, kill, or attempt to pursue, hunt, shoot, capture, collect, or kill, unless the context otherwise requires.” Most bird species native to North America are covered by this act.

Sensitive Natural Communities
The California Office of Planning and Research and the Office of Permit Assistance (1986) define project effects that substantially diminish habitat for fish, wildlife, or plants, or that disrupt or divide the physical arrangement of an established community as significant impacts under CEQA. 314

This definition applies to certain natural communities because of their scarcity and ecological values and because the remaining occurrences are vulnerable to elimination. For this study, the term “sensitive natural community” includes those communities that, if eliminated or substantially degraded, would sustain a significant adverse impact as defined under CEQA. Sensitive natural communities are important ecologically because their degradation and destruction could threaten populations of dependent plant and wildlife species and significantly reduce the regional distribution and viability of the community. If the number and extent of sensitive natural communities continue to diminish, the status of rare, threatened, or endangered species could become more precarious, and populations of common species (i.e., not special status species) could become less viable. Loss of sensitive natural communities also can eliminate or reduce important ecosystem functions, such as water filtration by wetlands and bank stabilization by riparian woodlands for example.

Protected Plants
The California Desert Native Plant Act was passed in 1981 to protect non-listed California desert native plants from unlawful harvesting on both public and privately-owned lands. Harvest, transport, sale, or possession of specific native desert plants is prohibited unless a person has a valid permit. The following plants are under the protection of the California Desert Native Plants Act:
● Dalea spinosa (smoketree)
● All species of the genus Prosopis (mesquites)
● All species of the family Agavaceae (century plants, nolinas, yuccas) ● All species of Cactus
● Creosote Rings, ten feet in diameter or greater
● All Joshua Trees
The project would be required to comply with the County of San Bernardino Desert Native Plant Protection Ordinance. The removal of any trees listed under Section 88.01.060 would be required to comply with Section 88.01.050, which requires the project applicant to apply for a Tree or Plant Removal Permit prior to removal from the project site.

315

CULTURAL RESOURCE ASSESSMENT
16 LOT SUBDIVISION PROJECT

ON PETERSON ROAD
Assessor’s Parcel Nos. 689-090-003, 689-130-004, -005, -013, -014, -and 017 and 689-140-022 City of Rancho Mirage, Riverside County, California
For Submittal to:

Development Services Department, Planning Division
City of Rancho Mirage
69-825 Highway 111
Rancho Mirage, CA 92270
Prepared for:

Horti Caesaris, LLC
9401 Wilshire Blvd, 9th Floor
Beverly Hills, CA 90212
Prepared by:

CRM TECH
1016 East Cooley Drive, Suite A/B
Colton, CA 92324
Bai “Tom” Tang, Principal Investigator
Michael Hogan, Principal Investigator
March 25, 2024
CRM TECH Contract No. 4085

APPENDIX C
316

Cultural Resource Assessment

Title: Cultural Resource Assessment: 16 Lot Subdivision Project on Peterson Road; Assessor’s Parcel Nos. 689-090-003, 689-130- 004, -005, -013, -014, and -017, and 689-140-022, City of Rancho Mirage, Riverside County, California

Authors: Frank Raslich, Archaeologist/Report Writer
Michael Hogan, Principal Investigator

Consulting Firm: CRM TECH
1016 East Cooley Drive, Suite A/B
Colton, CA 92324
(909) 824-6400

Date: March 25, 2024

For Submittal to: Development Services Department, Planning Division City of Rancho Mirage
69-825 Highway 111
Rancho Mirage, CA 92270
(760) 328-2266

Prepared for: Konstantinos Patis
Horti Caesaris, LLC
9401 Wilshire Blvd, 9th Floor
Beverly Hills, CA 90212
+30-21-08128242

Project Size: Approximately 19.8 acres

USGS
Quadrangle:

Cathedral City, Calif., 7.5’ quadrangle (Section 2, T5S R5E, San Bernardino Baseline and Meridian)

Keywords: Coachella Valley, western Colorado Desert; Phase I cultural resource assessment; no “historical resources” under CEQA

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EXECUTIVE SUMMARY
Between December 2023 and March 2024, at the request of Horti Caesaris, LLC, CRM TECH performed a cultural resources survey on approximately 19.8 acres of undeveloped land in the City of Rancho Mirage, Riverside County, California. The subject property of the study consists of Assessor’s Parcel Nos. 689-090-003, 689-130- 004, -005, -013, -014, and -017 and 689-140-022, located on both the east and west sides of Peterson Road, north of Mirage Cove Drive, and south of the Whitewater River, in the northwest quarter of Section 2, Township 5 South, Range 5 East, San Bernardino Baseline and Meridian.

The study is part of the environmental review process for a proposed 16-lot subdivision project. The City of Rancho Mirage, as the lead agency for the project, required the study in compliance with the California Environmental Quality Act (CEQA). The purpose of the study is to provide the City with the necessary information and analysis to determine whether the project would cause substantial adverse changes to any “historical resources,” as defined by CEQA, that may exist in or around the project area.

To identify such resources, CRM TECH conducted a historical/archaeological resources records search, initiated a Native American Sacred Lands File search, contacted pertinent Native American representatives, pursued historical background research, and carried out an intensive-level field survey. Throughout the various avenues of research, this study did not encounter any “historical resources” within or adjacent to the project area. Therefore, CRM TECH recommends to the City of Rancho Mirage a finding of No Impact regarding “historical resources.” No further cultural resources investigation is recommended for the project unless development plans undergo such changes as to include areas not covered by this study.

However, if buried cultural materials are encountered during any earth-moving operations associated with the project, all work in that area should be halted or diverted until a qualified archaeologist can evaluate the nature and significance of the finds. 318

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TABLE OF CONTENTS
EXECUTIVE SUMMARY ................................................................................................................... i INTRODUCTION ................................................................................................................................ 1 SETTING .............................................................................................................................................. 4 Current Natural Setting ..................................................................................................................... 4 Cultural Setting ................................................................................................................................. 5 Prehistoric Context........................................................................................................................ 5 Ethnohistoric Context ................................................................................................................... 5 Historic Context ............................................................................................................................ 7 RESEARCH METHODS ..................................................................................................................... 8 Records Search.................................................................................................................................. 8 Native American Participation .......................................................................................................... 8 Historical Background Research....................................................................................................... 8 Field Survey ...................................................................................................................................... 8 RESULTS AND FINDINGS ................................................................................................................ 9 Records Search.................................................................................................................................. 9 Native American Participation .......................................................................................................... 9 Historical Background Research....................................................................................................... 9 Field Survey .................................................................................................................................... 12 DISCUSSION ..................................................................................................................................... 12 CONCLUSIONS AND RECOMMENDATIONS ............................................................................. 13 REFERENCES ................................................................................................................................... 14 APPENDIX 1: Personnel Qualifications ............................................................................................ 16 APPENDIX 2: Native American Scoping Responses ........................................................................ 20

LIST OF FIGURES
Figure 1. The project vicinity ............................................................................................................... 1 Figure 2. The project area and vicinity on the USGS quadrangle ....................................................... 2 Figure 3. A recent satellite image showing the project area ................................................................ 3 Figure 4. Overview of the current natural setting of the project area .................................................. 4 Figure 5. Previous cultural resources studies in the vicinity of the project area ............................... 10 Figure 6. The project area and vicinity in 1855-1856 ........................................................................ 11 Figure 7. The project area and vicinity in 1901 ................................................................................. 11 Figure 8. The project area and vicinity in 1941 ................................................................................. 11 Figure 9. The project area and vicinity in 1956-1958 ........................................................................ 11 319

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INTRODUCTION
Between December 2023 and March 2024, at the request of Horti Caesaris, LLC, CRM TECH performed a cultural resources survey on approximately 19.8 acres of undeveloped land in the City of Rancho Mirage, Riverside County, California (Figure 1). The subject property of the study consists of Assessor’s Parcel Nos. 689-090-003, 689-130-004, -005, -013, -014, -017 and 689-140- 022, located on both the east and west sides of Peterson Road, north of Mirage Cove Drive, and south of the Whitewater River, in the northwest quarter of Section 2, Township 5 South, Range 5 East, San Bernardino Baseline and Meridian (Figures 2, 3).

The study is part of the environmental review process for a proposed 16-lot subdivision project. The City of Rancho Mirage, as the lead agency for the project, required the study in compliance with the California Environmental Quality Act (CEQA; PRC §21000, et seq.). The purpose of the study is to provide the City with the necessary information and analysis to determine whether the project would cause substantial adverse changes to any “historical resources,” as defined by CEQA, that may exist in or around the project area.

To identify such resources, CRM TECH conducted a historical/archaeological resources records search, initiated a Native American Sacred Lands File search, contacted pertinent Native American representatives, pursued historical background research, and carried out an intensive-level field survey. The following report is a complete account of the methods, results, and final conclusion of the study. Personnel who participated in the study are named in the appropriate sections below, and their qualifications are provided in Appendix 1.

Figure 1. The project vicinity. (Based on the USGS Santa Ana, Calif., quadrangle [USGS 1979]) 320
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Figure 2. The project area and vicinity. (Based on the USGS Cathedral City, Calif., 7.5’ quadrangle [USGS 1981]) 321
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Figure 3. A recent satellite image showing the project area. (Based on Google Earth imagery) 322

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SETTING

CURRENT NATURAL SETTING

The City of Rancho Mirage is located in the heart of the Coachella Valley, a northwest-southeast trending desert valley that constitutes the western end of the Colorado Desert. Dictated by this geographic setting, the climate and environment of the region are typical of the southern California desert country, marked by extremes in temperature and aridity. Temperatures in the region reach over 120 degrees Fahrenheit in summer, and dip to freezing in winter. Average annual precipitation is less than five inches, and the average annual evaporation rate exceeds three feet.

The project location is in the City of Rancho Mirage, in a rapidly urbanizing area near Highway 111.

The property is surrounded by residential neighborhoods of relatively recent vintages to the west, the Whitewater River on the north and east, and residential developments to the south. The terrain in the project area is generally level, with elevations ranging approximately from 313 to 330 feet above mean sea level. The surface soil is composed of light olive gray fine sand.

The project location is within what would be the California Creosote Bush Scrub plant community; however, the ground surface in the project area has been cleared of native vegetation in the past and existing vegetation include introduced and ruderal species such as landscaping plants and low-lying grasses (Figure 4).

Figure 4. Overview of the current natural setting of the project area. (January 19, 2024; view to the east)

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CULTURAL SETTING
Prehistoric Context
Numerous investigations on the history of cultural development in southern California have led researchers to propose a number of cultural chronologies for the desert regions. A specific cultural sequence for the Colorado Desert was offered by Schaefer (1994) on the basis of the many archaeological studies conducted in the area. The earliest time period identified is the Paleoindian (ca. 8,000 to 10,000-12,000 years ago), when “small, mobile bands” of hunters and gatherers, who relied on a variety of small and large game animals as well as wild plants for subsistence, roamed the region (Schaefer 1994:63). These small groups settled “on mesas and terraces overlooking larger washes” (Schaefer 1994:64). The artifact assemblage of that period typically consists of very simple stone tools, “cleared circles, rock rings, [and] some geoglyph types” (Schaefer 1994:64).

The Early Archaic Period follows and dates to ca. 8,000 to 4,000 years ago. It appears that a decrease in population density occurred at this time and that the indigenous groups of the area relied more on foraging than hunting. Very few archaeological remains have been identified to this time period. The ensuing Late Archaic Period (ca. 4,000 to 1,500 years ago) is characterized by continued low population densities and groups of “flexible” sizes that settled near available seasonal food resources and relied on “opportunistic” hunting of game animals. Stone grinding implements for food processing were prominent during this time period.

The most recent period in Schaefer’s scheme, the Late Prehistoric, dates from ca. 1,500 years ago to the time of the Spanish missions and saw the continuation of the seasonal settlement pattern.

Peoples of the Late Prehistoric Period were associated with the Patayan cultural pattern and relied more heavily on the availability of seasonal “wild plants and animal resources” (Schaefer 1994:66).

It was during this period that ceramics and the bow and arrow were introduced into the region.

The shores of Holocene Lake Cahuilla, during times of its presence, attracted much settlement and resource procurement activities. In times of the lake’s desiccation and absence, according to Schaefer (1994:66), the Native people moved away from its receding shores towards rivers, streams, and mountains. Numerous archaeological sites dating to the last high stand of Holocene Lake Cahuilla, roughly between 1600 and 1700 A.D., have been identified along its former shoreline.

Testing and mitigative excavations at these sites have recovered brown and buff ware ceramics, a variety of stone grinding tools and projectile point types, ornaments, and cremation remains.

Ethnohistoric Context
The Coachella Valley is a historical center of Native American settlement, where U.S. surveyors noted large numbers of Indian villages and rancherías, occupied by the Cahuilla people, in the mid- 19th century. The origin of the name “Cahuilla” is unclear, but may originate from their own word káwiya, meaning master or boss (Bean 1978). The Takic-speaking Cahuilla are generally divided by anthropologists into three groups, according to their geographic setting: the Pass Cahuilla of the San Gorgonio Pass-Palm Springs area, the Mountain Cahuilla of the San Jacinto and Santa Rosa Mountains and the Cahuilla Valley, and the Desert Cahuilla of the eastern Coachella Valley. The 324

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basic written sources on Cahuilla culture and history include Kroeber (1925), Strong (1929), and Bean (1978), based on information provided by such Cahuilla informants as Juan Siva, Francisco Patencio, Katherine Siva Saubel, and Mariano Saubel. The following ethnohistoric discussion is based primarily on these sources.

The Cahuilla did not have a single name that referred to an all-inclusive tribal affiliation. Instead, membership was in terms of lineages or clans. Each lineage or clan belonged to one of two main divisions of the people, known as moieties. Their moieties were named for the Wildcat, or Tuktum, and Coyote, or Istam. Members of clans in one moiety had to marry into clans from the other moiety. Individual clans had villages, or central places, and territories they called their own, for purposes of hunting game, and gathering raw materials for food, medicine, ritual, or tool use. They interacted with other clans through trade, intermarriage, and ceremonies.

Cahuilla subsistence was defined by the surrounding landscape and primarily based on the hunting and gathering of wild and cultivated foods, exploiting nearly all of the resources available in a highly developed seasonal mobility system. They were adapted to the arid conditions of the desert floor, the lacustral cycles of Holocene Lake Cahuilla, and the environments of the nearby mountains.

When the lake was full, or nearly full, the Cahuilla would take advantage of the resources presented by the body of fresh water, building elaborate stone fish traps. Once the lake had desiccated, they relied on the available terrestrial resources. The cooler temperatures and resources available at higher elevations in the nearby mountains were also taken advantage of.

The Cahuilla diet included seeds, roots, wild fruits and berries, acorns, wild onions, piñon nuts, and mesquite and screw beans. Medicinal plants such as creosote, California sagebrush, yerba buena and elderberry were typically cultivated near villages (Bean and Saubel 1972). Common game animals included deer, antelope, big horn sheep, rabbits, wood rats and, when Holocene Lake Cahuilla was present, fish and waterfowl. The Cahuilla hunted with throwing sticks, clubs, nets, traps, and snares, as well as bows and arrow (Bean 1978; CSRI 2002). Common tools included manos and metates, mortars and pestles, hammerstones, fire drills, awls, arrow-straighteners, and stone knives and scrapers. These lithic tools were made from locally sourced material as well as materials procured through trade or travel. They also used wood, horn, and bone spoons and stirrers; baskets for winnowing, leaching, grinding, transporting, parching, storing, and cooking; and pottery vessels for carrying water, storage, cooking, and serving food and drink (Bean 1978; CSRI 2002).

As the landscape defined their subsistence practices, the tending and cultivation practices of the Cahuilla helped shape the landscape. Biological studies have recently found evidence that the fan palms found in the Coachella Valley and throughout the southeastern California desert (Washingtonia filifera) may not be relics from a paleo-tropical environment, but instead a relatively recent addition brought to the area and cultivated by native populations (Anderson 2005). The planting of palms by the Cahuilla is well-documented, as is their enhancement of palm stands through the practice of controlled burning (Anderson 2005; Bean and Saubel 1972). Burning palm stands would increase fruit yield dramatically by eliminating pests such as the palm borer beetle, date scales, and spider mites (Bean and Saubel 1972). It also prevented out-of-control wildfires by eliminating dead undergrowth before it accumulated to dangerous levels. The Cahuilla also burned stands of chia to produce higher yields, and deergrass to yield straighter, more abundant stalks for basketry (Bean and Saubel 1972; Anderson 2005).
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Population data prior to European contact is almost impossible to obtain, but estimates range from 3,600 to as high as 10,000 persons covering a territory of over 2,400 square miles. During the 19th century, the Cahuilla population was decimated as a result of European diseases, most notably smallpox, for which the Native peoples had no immunity. Today, Native Americans of Pass or Desert Cahuilla heritage are mostly affiliated with one or more of the Indian reservations in and near the Coachella Valley, including Agua Caliente, Morongo, Cabazon, Torres Martinez, and Augustine.

There has been a resurgence of traditional ceremonies in recent years, and the language, songs, and stories are now being taught to the youngest generations.

Historic Context
In 1823-1825, José Romero, José Maria Estudillo, and Romualdo Pacheco became the first noted European explorers to travel through the Coachella Valley when they led a series of expeditions in search of a route to Yuma (Johnston 1987:92-95). Due to its harsh environment, few non-Indians ventured into the desert valley during the Mexican and early American periods, except those who traveled along the established trails. The most important of these trails was the Cocomaricopa Trail, an ancient Indian trading route that was “discovered” in 1862 by William David Bradshaw and known after that as the Bradshaw Trail (Gunther 1984:71; Ross 1992:25). In much of the Coachella Valley, this historic wagon road traversed a similar course to that of present-day State Route 111.

During the 1860s-1870s, the Bradshaw Trail served as the main thoroughfare between coastal southern California and the Colorado River, until the completion of the Southern Pacific Railroad in 1876-1877 brought an end to its heyday (Johnston 1987:185).

Non-Indian settlement in the Coachella Valley began in the 1870s with the establishment of railroad stations along the Southern Pacific Railroad and spread further in the 1880s after public land was opened for claims under the Homestead Act, the Desert Land Act, and other federal land laws (Laflin 1998:35-36; Robinson 1948:169-171). Farming became the dominant economic activity in the valley thanks to the development of underground water sources, often in the form of artesian wells. Around the turn of the century, the date palm was introduced into the Coachella Valley, and by the late 1910s dates were the main agricultural crop and the tree an iconic image celebrating the region as the “Arabia of America” (Shields Date Gardens 1957). Then, starting in the 1920s, a new industry featuring equestrian camps, resorts, hotels, and eventually country clubs began to spread throughout the Coachella Valley, transforming it into southern California’s premier winter retreat.

In the Rancho Mirage area, the first notable settlement activities occurred in the 1910s-1920s, when several date ranches were established in the present-day city boundary (Love and Tang 1996:7). In 1924, R.P. “Bert” Davie and E.E. McIntyre subdivided the Rancho Rio del Sol Estates around today’s Clancy Lane, creating a small community nicknamed “Little Santa Monica” (Love and Tang 1996:8). Ten years later, Louis Blankenhorn and Laurence Macomber began a new subdivision at the mouth of Magnesia Spring Canyon, and for the first time bestowed the name Rancho Mirage on the community (Love and Tang 1996:8). After the end of WWII, Rancho Mirage embarked on a period of rapid growth. With the development of the Thunderbird Country Club and the Tamarisk Country Club in 1951-1952, Rancho Mirage set the trend in the post-WWII boom among the five cove communities along Highway 111 (Love and Tang 1996:8-9). This trend has continued into the present and has given rise to the City of Rancho Mirage’s popular reputation as the “country club city.”
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RESEARCH METHODS

RECORDS SEARCH

On January 9, 2024, CRM TECH archaeologist Nina Gallardo completed the historical/ archaeological resources records search for this study at the Eastern Information Center (EIC) of the California Historical Resources Information System. Located on the campus of the University of California, Riverside, the EIC is the official cultural resource records repository for the County of Riverside. The purpose of the records search was to compile a complete inventory of previously identified cultural resources and existing cultural resources reports within a one-mile radius of the project location. Previously identified cultural resources include properties designated as California Historical Landmarks, Points of Historical Interest, or Riverside County Historic Landmarks, as well as those listed in the National Register of Historic Places, the California Register of Historical Resources, or the California Historical Resources Inventory.

NATIVE AMERICAN PARTICIPATION

On December 21, 2023, CRM TECH submitted a written request to the State of California Native American Heritage Commission (NAHC) for a records search in the commission’s Sacred Lands File. In the meantime, CRM TECH also contacted the nearby Agua Caliente Band of Cahuilla Indians (ACBCI) for additional information on potential Native American cultural resources in the project vicinity and to arrange for tribal participation in the upcoming archaeological field survey.

The responses from the NAHC and the ACBCI are summarized below and attached to this report in Appendix 2.

HISTORICAL BACKGROUND RESEARCH

Historical background research for this study was conducted by CRM TECH Archaeologist Frank Raslich. In addition to published literature in local and regional history, sources consulted during the research included U.S. General Land Office (GLO) land survey plat maps dated 1856, United States Geological Survey (USGS) topographic maps dated 1904-1988, and aerial/satellite photographs taken in 1959-2023. The historical maps are available at the websites of the U.S.

Bureau of Land Management and the USGS, and the aerial/satellite photographs are available at the website of Nationwide Environmental Title Research (NETR) Online and through the Google Earth software.

FIELD SURVEY

On January 19, 2024, CRM TECH archaeologists Michael D. Richards and Malika Mobley carried out the field survey of the project area with the assistance of ACBCI Cultural Resources Analyst Claritsa Duarte from the Tribal Historic Preservation Office. The survey was conducted at an intensive level by walking a series of parallel north-south transects at 15-meter (approximately 50- foot) intervals. In this way, the entire project area was systematically and carefully examined for any evidence of human activities dating to the prehistoric or historic period (i.e., 50 years or older).

Ground visibility was fair (~50 percent) in areas where there were low-lying grasses but excellent (~90 percent) where there was little to no vegetation.
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RESULTS AND FINDINGS

RECORDS SEARCH
According to EIC records, the project area had been surveyed for cultural resources once prior to this study (RI-08506 in Figure 5; Sander 2010). No cultural resources have been recorded on or adjacent to the property, however. Within the one-mile scope of the records search, EIC records identified a total of 30 previous studies completed on various tracts of land and linear features between 1979 and 2016 (Figure 5).

As a result of these and other similar studies in the vicinity, one historic-period site and one prehistoric-period site were previously recorded within the scope of the records search but outside the current project area. The historic-period site (33-005513) was recorded as the Peterson Ranch, a single wood frame house ca. 1930s (Wagner 1982). The prehistoric-period site (33-000628/CA- RIV-628T) consists of a trail segment and several stone cairns (Banks 1979; Parr and Arkush 1988; Bissell 2000). These previously recorded cultural resources were found more than a quarter mile from the project location. As such, none of them requires further consideration during this study.

NATIVE AMERICAN PARTICIPATION
In response to CRM TECH’s inquiry, the NAHC reported in a letter dated January 18, 2024, that the Sacred Lands File identified no Native American cultural resources in the project vicinity but recommended contacting local Native American groups for further information. For that purpose, the NAHC provided a list of potential contacts in the region. The NAHC’s reply is attached to this report in Appendix 2 for reference by the City of Rancho Mirage in future government-to- government consultations, if necessary.

As mentioned above, the ACBCI, which is the nearest tribe to the project location, participated in the archaeological field survey for this study on January 19, 2024. In a letter dated December 26, 2023, Xitlaly Madrigal, Cultural Resources Analyst with the ACBCI Tribal Historic Preservation Office, identified the project location as a part of the tribe’s Traditional Use Area. Therefore, the ACBCI requested copies of all cultural resources documentation generated for this project for review by the Tribal Historic Preservation Office as well as the presence of an ACBCI Cultural Resource Monitor (see App. 2).

HISTORICAL BACKGROUND RESEARCH
Historical sources consulted for this study indicate that the entire project area was unsettled and undeveloped until the mid-20th century (Figures 6-9). Between the 1850s and the 1930s, no human- made features of any kind were noted within or adjacent to the project area despite its location near the Southern Pacific Railroad (built in the 1870s), U.S. Highway 60/70/99 (built prior to the 1920s), and two other major transportation arteries located approximately two miles to the north (Figures 6- 8). By the 1940s, Rio del Sol Road, the forerunner of present-day Bob Hope Drive, had been completed near the project vicinity along with several date gardens and ranches and a structure was present in the southern part of the project area (Figure 9). 328

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Figure 5. Previous cultural resources studies in the vicinity of the project area, listed by EIC file number. Locations of known historical/archaeological resources are not shown as a protective measure. 329
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Figure 6. The project area and vicinity in 1855-1856.
(Source: GLO 1856a,b)
Figure 7. The project area and vicinity in 1901. (Source:

USGS 1904)
Figure 8. The project area and vicinity in 1941. (Source:

USGS 1941a, b)
Figure 9. The project area and vicinity in 1956-1958.
(Source: USGS 1958)
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By 1957, roads and housing appeared around and within the project area (Figure 9; NETR Online 1972). To the south of the project location, Gerald Ford Drive was first laid out between 1979 and 1984 and subsequently became a paved road by 1996, which ushered in a period of rapid urban growth in the surrounding area (NETR Online 1977-1996). The residential neighborhoods to the north and the south of the project location and the commercial properties to the west were all developed since then (NETR Online 1996-2020; Google Earth 1996-2023). The project area was not involved in any of these nearby developments. The structures in the southern part of the project area appears to have been removed after 2005 but before 2009 (NETR Online 1996-2020; Google Earth 1996-2023). The rest of the study area, however, has remained undeveloped and largely unused to the present time (NETR Online 1996-2020; Google Earth 1996-2023).

FIELD SURVEY

The field survey of the project area produced completely negative results for any potential “historical resources,” and no buildings, structures, objects, sites, features, or artifacts more than 50 years of age were encountered within the project boundaries. The entirety of the project area has been disturbed in the past, with all native vegetation being removed. Previous modern development and demolition have impacted the ground surface. Modern debris is comprised of milled lumber fragments, PVC pipe, chain fencing, broken glass bottle fragments, a few steel cans, and paper and building material refuse. No evidence of the structures previously located in the southern portion of the project area were observed. There are residential developments, a paved road, fencing along the Whitewater drainage, and utility poles, adjacent to the project area, but all of these items are modern in origin and, therefore, none of them are of any historical/archaeological interest.

DISCUSSION

The purpose of this study is to identify any cultural resources within the project area and to assist the City of Rancho Mirage in determining whether such resources meet the official definition of “historical resources,” as provided in the California Public Resources Code, in particular CEQA.

According to PRC §5020.1(j), “‘historical resource’ includes, but is not limited to, any object, building, site, area, place, record, or manuscript which is historically or archaeologically significant, or is significant in the architectural, engineering, scientific, economic, agricultural, educational, social, political, military, or cultural annals of California.”

More specifically, CEQA guidelines state that the term “historical resources” applies to any such resources listed in or determined to be eligible for listing in the California Register of Historical Resources, included in a local register of historical resources, or determined to be historically significant by the lead agency (Title 14 CCR §15064.5(a)(1)-(3)). Regarding the proper criteria for the evaluation of historical significance, CEQA guidelines mandate that “generally a resource shall be considered by the lead agency to be ‘historically significant’ if the resource meets the criteria for listing on the California Register of Historical Resources” (Title 14 CCR §15064.5(a)(3)). A resource may be listed in the California Register if it meets any of the following criteria:

(1) Is associated with events that have made a significant contribution to the broad patterns of California’s history and cultural heritage.
(2) Is associated with the lives of persons important in our past. 331

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(3)Embodies the distinctive characteristics of a type, period, region, or method of construction, or represents the work of an important creative individual, or possesses high artistic values. (4)Has yielded, or may be likely to yield, information important in prehistory or history. (PRC §5024.1(c))
In summary of the research results presented above, no potential “historical resources” were previously recorded within or adjacent to the project area, and none was found during the present survey. In addition, Native American input during this study identified no properties of traditional cultural value in the project vicinity. Based on these findings, and considering the criteria listed above, the present report concludes that no historical resources exist within or adjacent to the project area. Therefore, CRM TECH recommends to the City of Rancho Mirage a finding of No Impact regarding “historical resources.”

CONCLUSIONS AND RECOMMENDATIONS
CEQA establishes that a project that may cause a substantial adverse change in the significance of a “historical resource” is a project that may have a significant effect on the environment (PRC §21084.1). “Substantial adverse change,” according to PRC §5020.1(q), “means demolition, destruction, relocation, or alteration such that the significance of a historical resource would be impaired.” As stated above, no “historical resources,” as defined by CEQA, were encountered throughout the course of this study. Therefore, CRM TECH presents the following recommendations to the City of Rancho Mirage:
•The proposed project will not cause a substantial adverse change to any known “historical resources.”
•No further cultural resources investigation is necessary for the project unless development plans undergo such changes as to include areas not covered by this study. •If buried cultural materials are discovered during any earth-moving operations associated with the project, all work in that area should be halted or diverted until a qualified archaeologist can evaluate the nature and significance of the finds.
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REFERENCES

Anderson, M. Kat
2005 Tending the Wild: Native American Knowledge and the Management of California’s Natural Resources. University of California Press, Berkeley.

Banks, Thomas
1979 Site Record for Site 33-000628 (CA-RIV-628T). On File, Eastern Information Center, University of California, Riverside.

Bean, Lowell John
1978 Cahuilla. In Robert F. Heizer (ed.): Handbook of North American Indians, Vol. 8:

California; pp. 575-587. Smithsonian Institution, Washington, D.C.

Bean, Lowell John, and Katherine Siva Saubel
1972 Temalpakh: Cahuilla Indian Knowledge and Usage of Plants. Malki Museum Press, Banning, California.

Bissell, Ron M.
2000 Site Record (Update) for Site 33-000628 (CA-RIV-628T). On File, Eastern Information Center, University of California, Riverside.

CSRI (Cultural Systems Research, Inc.)
2002 The Native Americans of Joshua Tree National Park: An Ethnographic Overview and Assessment Study. Http:// www.cr.nps.gov/history/online_books/jotr/history6.htm .

GLO (General Land Office, U.S. Department of the Interior) 1856a Plat map: Township No. IV South Range No. V East, San Bernardino Meridian; surveyed in 1855-1856.
1856b Plat map: Township No. V South Range No. V East, San Bernardino Meridian; surveyed in 1855-1856.

Google Earth
1996-2023 Aerial/satellite photographs of the project vicinity; taken in 1996, 2002, 2004-2006, 2009, 2011-2013, 2015-2019, and 2021-2023. Available through the Google Earth software.

Gunther, Jane Davies
1984 Riverside County, California, Place Names: Their Origins and Their Stories. J.D.

Gunther, Riverside.

Johnston, Francis J.
1987 The Bradshaw Trail; revised edition. Historical Commission Press, Riverside.

Kroeber, Alfred L.
1925 Handbook of the Indians of California. Bureau of American Ethnology Bulletin 78.

Government Printing Office, Washington, D.C.

Laflin, Patricia
1998 Coachella Valley California: A Pictorial History. The Donning Company, Virginia Beach, Virginia.

Love, Bruce, and Bai “Tom” Tang
1996 Cultural Resources Report: Rancho Mirage General Plan, City of Rancho Mirage, Riverside County, California. On File, Eastern Information Center, University of California, Riverside.

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NETR (Nationwide Environmental Title Research) Online
1959-2020 Aerial/satellite photographs of the project vicinity; taken in 1959, 1972, 1977, 1979, 1984, 1996, 2002, 2005, 2009, 2010, 2012, 2014, 2016, 2018, and 2020. http://www.historicaerials.com .

Parr, R.E and B.S. Arkush
1988 Site Record Update for Site 33-000628 (CA-RIV-628T). On File, Eastern Information Center, University of California, Riverside.

Robinson, W.W.
1948 Land in California. University of California Press, Berkeley.

Ross, Delmer G.
1992 Gold Road to La Paz: An Interpretive Guide to the Bradshaw Trail. Tales of the Mojave Road Publishing Company, Essex, California.

Sander, Jay K.
2010 A Phase I Cultural Resources Inventory for APN 689-090-003, 689-130-004, 689-130- 005,689-130-013, 689-130-014, 689-130-017, 689-130-018, and 689-140-022 Comprising Approximately 20 Acres Rancho Mirage, Riverside County, California. On file at Eastern Information Center.

Schaefer, Jerry
1994 The Challenge of Archaeological Research in the Colorado Desert: Recent Approaches and Discoveries. Journal of California and Great Basin Anthropology 16(1):60-80.

Shields Date Gardens
1957 Coachella Valley Desert Trails and the Romance and Sex Life of the Date. Shields Date Gardens, Indio.

Strong, William Duncan
1929 Aboriginal Society in Southern California. University of California Publications in American Archaeology and Ethnology, Vol. 26.

USGS (United States Geological Survey, U.S. Department of the Interior) 1904 Map: Indio, Calif. (30', 1:125,000); surveyed in 1901. 1941a Map: Edom, Calif. (15', 1:62,500); aerial photographs taken in 1941. 1941b Map: Toro Peak, Calif. (15’, 1:62,500); aerial photographs taken in 1941. 1958 Map: Cathedral City, Calif. (7.5', 1:24,000); aerial photographs in 1956. 1979 Map: Santa Ana, Calif. (1:250,000); 1959 edition revised. 1981 Map: Cathedral City, Calif. (7.5', 1:24,000); 1958 edition photorevised in 1978. 1988 Map: Rancho Mirage, Calif. (7.5’, 1:24,000); 1957 edition photorevised in 1984.

Wagner, Jim
1982 Site Record for Site 33-005513. On File, Eastern Information Center, University of California, Riverside.
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APPENDIX 1:

PERSONNEL QUALIFICATIONS
FRANK J. RASLICH, M.A.

Project Archaeologist/Report Writer
Education
2016- Ph.D. candidate, Michigan State University, East Lansing. 2010 M.A., Anthropology, Michigan State University, East Lansing. 2005 B.A., Anthropology, University of Michigan, Flint. 2019 Grant and Research Proposal Writing for Archaeologists; Society for American Archaeology online seminar.
2014 Bruker Industries Tracer S1800 pXRF Training; presented by Dr. Bruce Kaiser, Bruker Scientific.

Professional Experience
2022- Project Archaeologist/Report Writer, CRM TECH, Colton, California. 2022 Archaeological Monitor, Agua Caliente Band of Cahuilla Indians, Palm Springs, California.
2014-2022 Board of Directors, Ziibiwing Center of Anishinabe Culture and Lifeways, Saginaw Chippewa Indian Tribe of Michigan.
2008-2021 Archaeological Consultant, Saginaw Chippewa Indian Tribe of Michigan. 2019 Archaeologist, Sault Tribe of Chippewa Indians and Little Traverse Bay Band of Odawa Indians.
2016-2018 Adjunct Lecturer, Michigan State University, East Lansing. 2017-2018 Adjunct Lecturer, University of Michigan, Flint. 2009-2017 Teaching Assistant, Michigan State University, East Lansing. 2008-2014 Research Assistant, Intellectual Property Issues in Cultural Heritage, Simon Fraser University, British Columbia, Canada.
2010-2013 Research Assistant, Michigan State University, East Lansing. 2009-2011 Archaeologist/Crew Chief, Saginaw Chippewa Indian Tribe of Michigan.

Publications
2017 Preliminary Results of a Handheld X-Ray Fluorescence (pXRF) Analysis on a Marble Head Sarcophagus Sculpture from the Collection of the Kresge Art Center, Michigan State University. Submitted to Jon M. Frey, Department of Art, Art History, and Design, Michigan State University, East Lansing.
2013 Geochemical Analysis of the Dickenson Group of the Upper Peninsula, Michigan: A study of an Accreted Terrane of the Superior Province. Geological Society of America Abstracts with Programs 45:4(53)
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MICHAEL HOGAN, PH.D., RPA*
Principal Investigator/Archaeologist
Education
1991 Ph.D., Anthropology, University of California, Riverside. 1981 B.S., Anthropology, University of California, Riverside; with honors. 2021 “An Introduction to Geoarchaeology: How Understanding Basic Soils, Sediments, and Landforms can make you a Better Archaeologist.” SAA Online Seminar. 2002 “Section 106—National Historic Preservation Act: Federal Law at the Local Level,” UCLA Extension Course #888.
2002 “Recognizing Historic Artifacts,” workshop presented by Richard Norwood, Historical Archaeologist.
2002 “Wending Your Way through the Regulatory Maze,” symposium presented by the Association of Environmental Professionals.
1992 “Southern California Ceramics Workshop,” presented by Jerry Schaefer. 1992 “Historic Artifact Workshop,” presented by Anne Duffield-Stoll.

Registrations
*Registered Professional Archaeologist 41781498
Professional Experience
2002- Principal Investigator, CRM TECH, Riverside/Colton, California. 1999-2002 Field Director/Project Archaeologist/Project Paleontologist, CRM TECH. 1996-1998 Project Director and Ethnographer, Statistical Research, Inc., Redlands. 1992-1998 Assistant Research Anthropologist, University of California, Riverside 1992-1995 Project Director, Archaeological Research Unit, U.C. Riverside. 1991-1992 Crew Chief, Archaeological Research Unit, U.C. Riverside. 1984-1998 Project Director, Field Director, Crew Chief, and Archaeological Technician for various southern California cultural resources management firms.

Research Interests
Cultural Resource Management, Southern Californian Archaeology, Settlement and Exchange Patterns, Specialization and Stratification, Culture Change, Native American Culture, Cultural Diversity.

Cultural Resources Management Reports
Principal investigator for, author or co-author of, and contributor to numerous cultural resources management study reports since 1986.

Memberships
Society for American Archaeology; Society for California Archaeology; Pacific Coast Archaeological Society; Coachella Valley Archaeological Society. 336

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MICHAEL D. RICHARDS, M.A., RPA
Project Archaeologist
Education
2002 M.A., Anthropology, California State University, Northridge (CSUN). 1986 B.A., Anthropology: University of California, Los Angeles (UCLA). 1982 A.A., Los Angeles Valley College, Los Angeles, California. 2015 Section 106 workshop.
2000 CSUN “Olmec” field excavation and lab analysis; La Venta, Mexico. 1999 Rock art recording, UCLA Extension; Little Lake, California. 1998 Rock art symposium, UCLA Extension.

Professional Experience
2018- Project Archaeologist/Paleontologist, CRM TECH, Colton, Calif. 2016-2018 Co-Principal Investigator/Archaeologist, LSA Associates Inc. 2012-2016 Co-Principal Investigator/Archaeologist, ICF International (Jones & Stokes). 2010-2012 Co-Principal Investigator/Archaeologist, various CRM firms (on call). 2007-2010 Principal Investigator/Field Director/Crew Chief, ASM Affiliates, Inc. 2004-2007 Project Manager/Co-Principal Investigator, ArchaeoPaleo Resource Management, Inc. 2003-2004 Staff Archaeologist/Crew Chief, SRI, Inc.
2000-2003 Project Archaeologist/Field Director, Ancient Enterprises (Clewlow, Jr.). 1999-2000 Staff Archaeologist/Lab Crew Chief, CSC/Edwards Air Force Base.

Research Interests
Pottery and rock art analysis; prehistory the American southwest; Mesoamerica; Japan.

Cultural Resources Management Reports
Author and co-author of, contributor to, and principal investigator for numerous cultural resources management study reports since 1999.

Memberships
Society for American Archaeology; Society for California Archaeology; Archaeological Institute of America; Conejo Open Space Trails Advisory Committee; Conejo Valley Historical Society. 337

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NINA GALLARDO, B.A.

Project Archaeologist/Native American Liaison
Education
2004 B.A., Anthropology/Law and Society, University of California, Riverside.

Professional Experience
2004- Project Archaeologist, CRM TECH, Riverside/Colton, California.

Cultural Resources Management Reports
Co-author of and contributor to numerous cultural resources management reports since 2004. 338

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16 Lot Subdivision – Rancho Mirage Page 20 of 27
APPENDIX 2

NATIVE AMERICAN SCOPING RESPONSES
339

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16 Lot Subdivision – Rancho Mirage Page 21 of 27

SACRED LANDS FILE & NATIVE AMERICAN CONTACTS LIST REQUEST NATIVE AMERICAN HERITAGE COMMISSION 1550 Harbor Boulevard, Suite 100 West Sacramento, CA 95691 (916)373-3710 (916)373-5471 (Fax) [email protected] Project: Proposed 16-Lot Subdivision Project; APNs 689-090-003, 689-130-004, -005, -013, -014, - 017, and 689-140-022 (CRM TECH No. 4085)
County: Riverside
USGS Quadrangle Name: Cathedral City and Rancho Mirage, Calif.

Township 5 South Range 5 East SB BM; Section(s) 2 Company/Firm/Agency: CRM TECH
Contact Person: Nina Gallardo
Street Address: 1016 E. Cooley Drive, Suite A/B
City: Colton, CA Zip: 92324
Phone: (909) 824-6400 Fax: (909) 824-6405
Email: [email protected]
Project Description: The primary component of the project is to subdivide the property into a 16-lot residential development on approximately 20 acres, is located on both the east and west side of Peterson Road, north of Mirage Cove Drive and south of the Whitewater River, in the City of Rancho Mirage, Riverside County, California
December 21, 2023

340

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Cultural Resource Assessment
16 Lot Subdivision – Rancho Mirage Page 22 of 27 341
C ►IAIPPHGCII
R&glnald Pagaling
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V ~E-C H/\JRPEl'~:JN
Bully McQulllen
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SEC RETAIi',
Sara Dut MMSt.•Nl·R
Stanley Rodriguez
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Laurena Bolden
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Vacant
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Raymond ·c .

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NAHC HEADQUARTERS

15.'50 Harbor Boulevard
Suite 100
West So c 1amento ,
C0Uon1io Y56Y I
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ngh<; oobc cg .go v
NAH C.c a.gov
STATE OF CALIFORNIA Gavin Newsom Govemor

NATIVE AMERICAN HERITAGE COMMISSION
January 18, 2024
Nina Galldrdo

CR M TEC H
Via Emal! lo : nga llardo@crm t ech .us
Re: Proposed 16 -Lol Subdivision Projed , Riverside County Dear Ms. Gallardo:

CRH TECH
A record search of the Native American Heritage Comm ission (NAHC) Sacred Lands File (SLF) was completed for the information you have su bm itted for the above referenced project. The results were negative . However, th e absence of specific site information in the SLF does not indicate fhe absence o f cultural resources in any project area . Other sources of cull ura l resources should dlso be conldcled for informdtion regarding known ond recorded sites.

Attached ls o list of Native American tribes who may also ha ve knowledge of cultural resources in the profect area . This li st shou ld provide a starting place In locating areas of potent ial adverse Impact within !he proposed project area. I suggest you contact all of those indicated; if they cannot supply information, they might re commend others with specific knowledge. By co nlacti ng oil those Usfed , your organization will be better able lo respond to claims of failure lo consult with the appropriat e tribe. If a response has not been received within two weeks of not ification , lhe Commission reouests that you follow-up with a telephone call or email lo ensure that th e project informa tion hos been received .

II you receive notification of change of addresses and phone numbers from tribes . please notify me . With you r assistance , we can assure that our nsts con ta in current fnformatlo n .

If you have any question s or need additional Jnformallon , please contact rne al my email address : A ndrew.G reen nahc.ca.gov .

Sincerely,
Andrew Green
Cultural Resources Ano/yst
Attachment
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Native American Heritage Commission
Native American Contact List
Riverside County
1/18/2024
Tribe Name Fed (F)
Non-Fed
(N)
Contact Person Contact Address Phone # Fax # Email Address Cultural Affiliation
Counties
Agua Caliente Band of
Cahuilla Indians
F Lacy Padilla, THPO
Operations Manager
5401 Dinah Shore Drive
Palm Springs, CA, 92264
(760) 333-
5222
(760) 699-
6919
[email protected] Cahuilla Imperial,Riverside,San Bernardino,San Diego
Augustine Band of Cahuilla
Indians
F Tribal Operations, 84-001 Avenue 54
Coachella, CA, 92236
(760) 398-
4722
Cahuilla Imperial,Riverside,San
Bernardino,San Diego
Cabazon Band of Mission
Indians
F Doug Welmas,
Chairperson
84-245 Indio Springs
Parkway
Indio, CA, 92203
(760) 342-
2593
(760) 347-
7880
[email protected] Cahuilla Imperial,Riverside,San Bernardino,San Diego
Cahuilla Band of Indians F BobbyRay Esaprza,
Cultural Director
52701 CA Highway 371
Anza, CA, 92539
(951) 763-
5549
[email protected] Cahuilla Imperial,Riverside,San Bernardino,San Diego
Cahuilla Band of Indians F Anthony Madrigal, Tribal
Historic Preservation
Officer
52701 CA Highway 371
Anza, CA, 92539
(951) 763-
5549
[email protected] Cahuilla Imperial,Riverside,San Bernardino,San Diego
Cahuilla Band of Indians F Daniel Salgado,
Chairperson
52701 CA Highway 371
Anza, CA, 92539
(951) 972-
2568
(951)763-
2808
[email protected] Cahuilla Imperial,Riverside,San Bernardino,San Diego
Los Coyotes Band of Cahuilla
and Cupeño Indians
F Ray Chapparosa,
Chairperson
P.O. Box 189
Warner Springs, CA,
92086-0189
(760) 782-
0711
(760) 782-
0712
Cahuilla Imperial,Riverside,San
Bernardino,San Diego
Morongo Band of Mission
Indians
F Robert Martin,
Chairperson
12700 Pumarra Road
Banning, CA, 92220
(951) 755-
5110
(951) 755-
5177
[email protected] Cahuilla
Serrano
Imperial,Los
Angeles,Riverside,San
Bernardino,San Diego
Morongo Band of Mission
Indians
F Ann Brierty, THPO 12700 Pumarra Road
Banning, CA, 92220
(951) 755-
5259
(951) 572-
6004
[email protected] Cahuilla
Serrano
Imperial,Los
Angeles,Riverside,San
Bernardino,San Diego
Quechan Tribe of the Fort
Yuma Reservation
F Manfred Scott, Acting
Chairman - Kw'ts'an
Cultural Committee
P.O. Box 1899
Yuma, AZ, 85366
(928) 210-
8739
[email protected] Quechan Imperial,Kern,Los Angeles,Riverside,San
Bernardino,San Diego
Quechan Tribe of the Fort
Yuma Reservation
F Jordan Joaquin, President,
Quechan Tribal Council
P.O.Box 1899
Yuma, AZ, 85366
(760) 919-
3600
[email protected] Quechan Imperial,Kern,Los Angeles,Riverside,San
Bernardino,San Diego
Quechan Tribe of the Fort
Yuma Reservation
F Jill McCormick, Historic
Preservation Officer
P.O. Box 1899
Yuma, AZ, 85366
(928) 261-
0254
[email protected] Quechan Imperial,Kern,Los Angeles,Riverside,San
Bernardino,San Diego
Ramona Band of Cahuilla F John Gomez,
Environmental Coordinator
P. O. Box 391670
Anza, CA, 92539
(951) 763-
4105
(951) 763-
4325
[email protected] Cahuilla Imperial,Riverside,San
Bernardino,San Diego
342
) CRM TECH
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Ramona Band of Cahuilla F Joseph Hamilton,
Chairperson
P.O. Box 391670
Anza, CA, 92539
(951) 763-
4105
(951) 763-
4325
[email protected] Cahuilla Imperial,Riverside,San
Bernardino,San Diego
Santa Rosa Band of Cahuilla
Indians
F Lovina Redner, Tribal
Chair
P.O. Box 391820
Anza, CA, 92539
(951) 659-
2700
(951) 659-
2228
[email protected] Cahuilla Imperial,Los
Angeles,Orange,Riverside,San
Bernardino,San Diego
Soboba Band of Luiseno
Indians
F Joseph Ontiveros, Tribal
Historic Preservation
Officer
P.O. Box 487
San Jacinto, CA, 92581
(951) 663-
5279
(951) 654-
4198
[email protected] Cahuilla
Luiseno
Imperial,Los
Angeles,Orange,Riverside,San
Bernardino,San Diego
Soboba Band of Luiseno
Indians
F Jessica Valdez, Cultural
Resource Specialist
P.O. Box 487
San Jacinto, CA, 92581
(951) 663-
6261
(951) 654-
4198
[email protected] Cahuilla
Luiseno
Imperial,Los
Angeles,Orange,Riverside,San
Bernardino,San Diego
Torres-Martinez Desert
Cahuilla Indians
F Mary Belardo, Cultural
Committee Vice Chair
P.O. Box 1160
Thermal, CA, 92274
(760) 397-
0300
[email protected] Cahuilla Imperial,Riverside,San
Bernardino,San Diego
Torres-Martinez Desert
Cahuilla Indians
F Gary Resvaloso, TM MLD P.O. Box 1160
Thermal, CA, 92274
(760) 777-
0365
[email protected] Cahuilla Imperial,Riverside,San
Bernardino,San Diego
Torres-Martinez Desert
Cahuilla Indians
F Abraham Becerra, Cultural
Coordinator
P.O. Box 1160
Thermal, CA, 92274
(760) 397-
0300
[email protected] Cahuilla Imperial,Riverside,San
Bernardino,San Diego
Torres-Martinez Desert
Cahuilla Indians
F Thomas Tortez,
Chairperson
P.O. Box 1160
Thermal, CA, 92274
(760) 397-
0300
(760) 397-
8146
[email protected] Cahuilla Imperial,Riverside,San Bernardino,San Diego
Torres-Martinez Desert
Cahuilla Indians
F Alesia Reed, Cultural
Committee Chairwoman
P.O. Box 1160
Thermal, CA, 92274
(760) 397-
0300
[email protected] Cahuilla Imperial,Riverside,San
Bernardino,San Diego
This list is current only as of the date of this document. Distribution of this list does not relieve any person of statutory responsibility as defined in Section 7050.5 of the Health and Safety Code, Section 5097.94 of the Public Resource Section 5097.98 of the Public Resources Code.

This list is only applicable for contacting local Native Americans with re gard to cultural resources assessment for the proposed Proposed 16-Lot Subdivision Project, Riverside County. 343
) CRM TECH
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FROM: [email protected]
SENT: THURSDAY, DECEMBER 21, 2023 10:22 AM
TO: 'THPO CONSULTING'
CC: MADRIGAL, XITLALY (TRBL)
SUBJECT: CULTURAL STUDY AND PARTICIPATION IN FIELD SURVEY FOR THE PROPOSED 16-LOT SUBDIVISION PROJECT, IN THE CITY OF RANCHO MIRAGE (CRM TECH NO. 4085) ATTACHMENTS: 4085 NAHC REQUEST.DOCX; 4085 PA MAP.JPG
HELLO,
I’M WRITING TO INFORM YOU THAT CRM TECH WILL BE CONDUCTING A CULTURAL RESOURCES STUDY FOR THE PROPOSED 16-LOT SUBDIVISION PROJECT (APNS 689-090-003, 689-130-004, -005, -013, -014, -017, AND 689-140-022), IN THE CITY OF RANCHO MIRAGE, RIVERSIDE COUNTY, CALIFORNIA (CRM TECH NO. 4085).

SPECIFICALLY, I AM CONTACTING YOU TO SEE IF THE TRIBE WOULD LIKE TO PARTICIPATE IN THE FIELD SURVEY OF THE PROPERTY. WE WILL CONTACT YOU AGAIN WHEN WE BEGIN TO SET UP A SPECIFIC TIME AND DATE FOR THE FIELDWORK ONCE WE HAVE COMPLETED THE RECORD SEARCH AT THE EIC.

WE ARE ALSO ASKING FOR ANY INFORMATION REGARDING ANY TRIBAL CULTURAL RESOURCES WITHIN OR NEAR THE PROPOSED PROJECT LOCATION. I’M ALSO ATTACHING THE PROPOSED PROJECT AREA MAP, AND PROJECT INFORMATION. WE WOULD ALSO APPRECIATE ANY INFORMATION THAT THE TRIBE MAY PROVIDE THAT CRM TECH CAN INCLUDE IN OUR REPORT. PLEASE FEEL FREE TO EMAIL BACK WITH ANY QUESTIONS,

COMMENTS AND/ OR INFORMATION REGARDING THE PROPOSED PROJECT, AND POSSIBLE AVAILABILITY FOR THE FIELD SURVEY.

THANK YOU FOR YOUR TIME AND INPUT ON THIS PROJECT.

NINA GALLARDO
(909)824-6400 (PHONE)
(909)824-6405 (FAX)

CRM TECH
1016 E. COOLEY DRIVE, STE. A/B
COLTON, CA 92324
FROM: MADRIGAL, XITLALY (TRBL)
SENT: WEDNESDAY, JANUARY 17, 2024 11:30 AM
TO: '[email protected]'
CC: PADILLA, LACY (TRBL); DUARTE, CLARITSA (TRBL)
SUBJECT: RE: PROFESSIONAL OFFICE AND ART GALLERY
SOUNDS GOOD, CLARITSA WILL MEET MICHAEL OUT AT 7 AM AND IS AVAILABLE FOR BOTH SURVEYS.

THANK YOU,

XITLALY MADRIGAL

CULTURAL RESOURCES ANALYST
[email protected]
C: (760) 423-3485 | D: (760) 883-6829
5401 DINAH SHORE DRIVE, PALM SPRINGS, CA 92264
344

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llAfiD OF
December 26 , 202 3
[VIA EM AIL TO:n gall ardo @crmtech.us]

C RM TEC H
Ms. Nina Gall ardo
IO 16 E. Cooley Drive, Suite NB
Col to n, CA 92 324
Re: 16-L ot Subdivision in Rancho Mirage
Dear Ms. Nina Gall ardo,
CAHU ILLA I N!"IIAtl,
03 -008-2 023-009
The Agu a C aliente B.an d of Cahui lla Indians (ACBCI) appreciates your effort s to inclu de the Tri bal Histori c Pres ervation Offi ce (THP O) i n the 16-L ot Su bdi visi on project. T he project ar ea is n ot 1 oc ated wi thin the b0µn d ari es of th e A CBCI Reservati on . H owev er, it is w ithi n the Tri be's Traditional Use An a. For thi s re ason, the A CB CI THPO reque sts the foll owi ng:
*A cultur al res ourc es inv en tory of th e project area by a quali fi ei:I archaeologist pri or to an y dev elopm ent acti vi ti e s in this area. *A c opy of the re cords s earch with as sociated surv ey rep orts an d site re.cords from the inform ati on center.
*Copi es of a ny cul tural r es ourc e documen tati on (report an d site records) g en erated in conn ection wi th this project
*The pre-sen ce of an approved Agu a Caliente Nativ e Am eri can Cultural Res our ce M onitor (s) during any groun d di sturbing activiti es (i n cludi ng archaeologi cal testi ng and survey~)-Sh oul d b uri ed cultural deposits be enc ou ntered, th e Moni tor m ay reque st th at des tructive cottstructi on h alt and the Mon itor sh all noti fy a Q ualifie d Ar chaeol ogis t (Secretary of the Interior's Standard s an d Guideli n es) to investi gate an d, if ne cess ary, prep are a miti gati on plan for submi ssion to th e State Historic Preservati on Offi c er and the Agua Cali en te Tribal Histori c Pre s erv ation Offic e.

Ag ain, th e A gua Calie nte <ipp.reciat.es you1" intere st i n our cul tural h eri tage .. If you h ave qu esti ons or re quire additi on al information , please call me at (760) 423-3485. You may als o em ai l m e at AC BCI-THPO@aguacali ente.net .

Cordi al l y,
I I

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AGUA CALIENTE BAND OF CAHUILLA INDIANS-
t RfBAL HISTORIC P-Rf" 3-FRV.-.no,~
Xitlaly Madrigal
Cultural Resources Analyst
Tribal Historic Preservation Office

AGUA CALIENTE BAND

OF CAHUILLA INDIANS
510, l>ll-11\ti Sl fiJ liJ Ottl \l t , P111 M ~Fn!N n'!I, CA 9!22dil

PRELIMINARY HYDROLOGY STUDY
for
TENTATIVE TRACT MAP 38971

RANCHO MIRAGE, CALIFORNIA
Prepared for:

Horti Caesaris LLC
9401 Wilshire Blvd., 12th Floor
Beverly Hills, CA 90212-2928
Prepared by:FOMOTOR

ENGINEERING
225 S. Civic Drive, Suite 1-5
Palm Springs, California 92262
Phone (760)323-1842
Fax (760)323-1742
July 9, 2024

APPENDIX D
347

Table of Contents
I.Report
II.Reference Material
a.Vicinity Map
b.Flood Insurance Rate Map ( U.S. Department of Homeland Security Federal Emergency Management Act Map Service Center)
c.Hydrologic Soils Group Maps (From US Department of Agriculture Soil Conservation Service)
d.Point Precipitation Frequency (National Oceanic and Atmospheric Administration’s Precipitation Frequency Data Server)
e.City of Rancho Mirage Retention Basin Standard Detail 310. f.Impervious Cover for Developed Areas – Plate D-5.6 (RCFC&WCD Hydrology Manual).
g.Runoff Index– Plate D-5.5-Pg 1 (RCFC&WCD Hydrology Manual). h.Pervious Area Loss Rate – Plate E-6.2 (RCFC&WCD Hydrology Manual).
i.SUH Shortcut Method Basin and Runoff Calculation Spreadsheet VI.Exhibit
i.Preliminary Hydrology Exhibit
348

FOMOTOR ENGINEERING Preliminary Hydrology Study
Tentative Tract Map 38971

Page 1 ends

PRELIMINARY HYDROLOGY STUDY
FOR TENTATIVE TRACT MAP 38971

PROJECT SITE LOCATION
The 20.05-acre 16 lot proposed Tentative Tract Map site is located on Peterson Road, west of Mirage Cove Drive, in the City of Rancho Mirage, County of Riverside, California. The proposed development site lies in Section 2, T5S, R5E, and SBBM, with APNs: 689-090-003, 689-130-004, -005, -013, -014, -017, -018 and 689-140-022.

PROJECT SITE DESCRIPTION
The project site is presently vacant. Existing elevations vary from 264 down to 257 with a slight slope. The site is entirely composed of Hydrologic Soil Type “A”. A Tentative Tract Map is proposed on this site. The project site area is in shaded Zone X, which is described as: “2% Annual Chance Flood Hazard, Areas of 1% annual chance flood with average depth less than one foot or with drainage areas of less than one square mile”. (See Riverside County Flood Insurance Rate Map numbers 06065C1589G and 06065C1595G, Effective August 28, 2008, in Reference Materials).

PURPOSE
Each proposed lot within the project site was separately analyzed for proposed condition basin capacity using Synthetic Unit Hydrograph Shortcut Method for the 1, 3, 6, and 24-hour duration 100-year storm event to determine the worst-case contributing runoff volume. This computed runoff volume was used to size a proposed retention basin for each lot as per City of Rancho Mirage Standard Detail 310 for Retention Basins. The runoff from each proposed onsite area would be directed via swale system to the proposed retention basin. Adjacent half street frontage was added to the runoff area of each lot.

METHODOLOGY
The materials included with this study are presented to satisfy the criteria set forth in the Riverside County Flood Control & Water Conservation District (RCFC & WCD) Hydrology Manual. The onsite/offsite post- developed condition design runoff volume was determined using the worst of the 1, 3, 6, and 24-hour duration storm for the 100-year event. Peak discharges of the 100-year storm event will be determined with the Rational Formula. Synthetic Unit Hydrograph (SUH) calculations were performed in accordance with RCFC & WCD criteria. The Hydrologic Soil Group area was determined with the Natural Resources Conservation Service’s National Cooperative Soil Survey (See Reference Material). Point precipitation frequency data was obtained with the National Oceanic and Atmospheric Administration’s (NOAA) Precipitation Frequency Data Server from Atlas 14 (See Reference Material.). The NOAA point precipitation data of the 100-year event will be plotted on a log-log plot to obtain the slope of intensity duration curve which will be used in the Rational Method analysis. Any necessary storm drains will be modeled with the computer modeling software, Hydraflow Storm Sewers Extensions for AutoCAD Civil3D 2024, by Autodesk, Inc. Any necessary storm drain inlets will be sized as per AutoCAD Hydraflow Express Extension, Version 12.
349

FOMOTOR ENGINEERING Preliminary Hydrology Study
Tentative Tract Map 38971

Page 2 ends

RESULT OF SYNTHETIC UNIT HYDROGRAPH ANALYSIS
Summary of results of the Synthetic Unit Hydrograph (SUH) analysis are as follows:

Please refer to the attached Hydrology Plan, and SUH Calculation Spreadsheets in the Reference Materials Proposed Onsite and Offsite Area Runoff to Basins

DISCUSSION
Basin infiltration was not used to size the retention basins. A percolation test will be performed in the future. The 1-hour storm was determined to be the worst case of the 1, 3, 6, and 24-hour duration 100-year storm events for the Synthetic Unit Hydrograph analysis. In general, each lot will have an independent retention basin sized to contain the 100-year 1-hour runoff from each respective lot as well as the adjacent half-street frontage. Each basin will be four to five feet deep with 3 to 1 side slopes and receive runoff from swale flow (See SUH Shortcut Calculations and Preliminary Hydrology Plan in the Reference Materials).

The impermeable area used for calculations was based on a 1-acre residential lot from Plate D-5.6 of the RCFC&WCD Hydrology Manual and the adjacent half-street frontage was added. The Runoff Index was selected from Plate D-5.5 (1 of 2) of the RCFC&WCD Hydrology Manual.

BASIN ID CONTRIBUTING

AREA (ACRES)
(STREET

OFFSITE

FRONTAGE

0.09AC)
STORM

FREQUENCY
(YEAR)

DURATION
(HOUR)
PEAK
RUNOFF

STORAGE

VOLUME VS

INFILTRATION
(CU-FT) -POST
DEV
BASIN

CAPACITY
(CU-FT)
BASIN
DEPTH
(FT)
PEAK
BASIN
WATER
DEPTH
(FT)
LOT 1 1.09(1.00+0.09) 100 1 7,307 8,996 4 3.25
LOT 2 1.16(1.07+0.09) 100 1 7,777 8,239 4 3.78
LOT 3 1.18(1.09+0.09) 100 1 7,911 8,239 4 3.84
LOT 4 1.18(1.09+0.09) 100 1 7,911 8,239 4 3.84
LOT 5 1.18(1.09+0.09) 100 1 7,911 8,239 4 3.84
LOT 6 1.25(1.16+0.09) 100 1 8,380 8,471 4 3.96
LOT 7 1.25(1.16+0.09) 100 1 8,380 8,471 4 3.96
LOT 8 1.07(0.98+0.09) 100 1 7,173 8,239 4 3.48
LOT 9 1.07(0.98+0.09) 100 1 7,173 8,239 4 3.48
LOT 10 1.23(1.14+0.09) 100 1 8,246 8,331 5 4.95
LOT 11 1.45(1.36+0.09) 100 1 9,721 9,830 5 4.94
LOT 12 1.64(1.55+0.09) 100 1 10,995 11,159 5 4.93
LOT 13 1.12(1.03+0.09) 100 1 7,508 8,239 4 3.65
LOT 14 1.12(1.03+0.09) 100 1 7,508 8,239 4 3.65
LOT 15 1.12(1.03+0.09) 100 1 7,508 8,239 4 3.65
LOT 16 1.11(1.02+0.09) 100 1 7,441 8,239 4 3.61
350

REFERENCE MATERIAL
351

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Peterson Rd & Mirage Cove Dr
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9 National Flood Hazard Layer FIRMette
0 500 1,000 1,500 2,000250
Feet
Ü

SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT

SPECIAL FLOOD

HAZARD AREAS
Without Base Flood Elevation (BFE)
Zone A, V, A99
With BFE or DepthZone AE, AO, AH, VE, AR
Regulatory Floodway

0.2% Annual Chance Flood Hazard, Areas
of 1% annual chance flood with average
depth less than one foot or with drainage
areas of less than one square mileZone X
Future Conditions 1% Annual
Chance Flood HazardZone X
Area with Reduced Flood Risk due to
Levee. See Notes.Zone X
Area with Flood Risk due to LeveeZone D
NO SCREEN Area of Minimal Flood Hazard Zone X
Area of Undetermined Flood HazardZone D
Channel, Culvert, or Storm Sewer
Levee, Dike, or Floodwall
Cross Sections with 1% Annual Chance

17.5 Water Surface Elevation
Coastal Transect
Coastal Transect Baseline
Profile Baseline
Hydrographic Feature
Base Flood Elevation Line (BFE)
Effective LOMRs
Limit of Study
Jurisdiction Boundary
Digital Data Available
No Digital Data Available
Unmapped
This map complies with FEMA's standards for the use of
digital flood maps if it is not void as described below.

The basemap shown complies with FEMA's basemap
accuracy standards
The flood hazard information is derived directly from the authoritative NFHL web services provided by FEMA. This map was exported on 6/11/2024 at 4:17 PM and does not
reflect changes or amendments subsequent to this date and time. The NFHL and effective information may change or
become superseded by new data over time.

This map image is void if the one or more of the following map elements do not appear: basemap imagery, flood zone labels, legend, scale bar, map creation date, community identifiers, FIRM panel number, and FIRM effective date. Map images for unmapped and unmodernized areas cannot be used for
regulatory purposes.

Legend

OTHER AREAS OF

FLOOD HAZARD

OTHER AREAS

GENERAL

STRUCTURES
OTHER

FEATURES

MAP PANELS
8 B 20.2
The pin displayed on the map is an approximate
point selected by the user and does not represent
an authoritative property location.
1:6,000
116°26'38"W 33°46'7"N
116°26'W 33°45'37"N
Basemap Imagery Source: USGS National Map 2023
353
FEMA
c:::::::::J
1111111

Hydrologic Soil Group—Riverside County, Coachella Valley Area, California (North Area)
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
1/4/2024

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551860 551920 551980 552040 552100 552160 552220
551860 551920 551980 552040 552100 552160 552220
33° 46' 14'' N
116
°

2 6
'

2 4
'
'

W
33° 46' 14'' N
116
°

2 6
'

9 '
'

W
33° 45' 57'' N
11 6
°

2 6
'

2 4
'
'

W
33° 45' 57'' N
11 6
°

2 6
'

9 '
'

W
N
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 11N WGS84 0 100 200 400 600Feet
0 35 70 140 210Meters
Map Scale: 1:2,470 if printed on A portrait (8.5" x 11") sheet.

Soil Map may not be valid at this scale.
354USDA =

MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Rating Polygons
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Soil Rating Lines
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Soil Rating Points
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
The soil surveys that comprise your AOI were mapped at
1:24,000.

Warning: Soil Map may not be valid at this scale.

Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale.

Please rely on the bar scale on each map sheet for map
measurements.

Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:

Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required.

This product is generated from the USDA-NRCS certified data as of the version date(s) listed below.

Soil Survey Area: Riverside County, Coachella Valley Area, California
Survey Area Data: Version 15, Aug 30, 2023
Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.

Date(s) aerial images were photographed: Mar 15, 2022—May 28, 2022
The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident.

Hydrologic Soil Group—Riverside County, Coachella Valley Area, California (North Area)
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
1/4/2024

Page 2 of 4355 ends

□
D
D
D
D
D
D
D
D
,,..,,,.
,,..,,,.
□
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■
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•

Hydrologic Soil Group
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI CpA Coachella fine sand, 0
to 2 percent slopes
A 13.0 100.0%
Totals for Area of Interest 13.0 100.0%
Description
Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms.

The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows:

Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission.

Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture.

These soils have a moderate rate of water transmission.

Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission.

Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission.

If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes.

Rating Options
Aggregation Method: Dominant Condition
Component Percent Cutoff: None Specified
Hydrologic Soil Group—Riverside County, Coachella Valley Area, California North Area Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
1/4/2024

Page 3 of 4356 ends

USDA =

Hydrologic Soil Group—Riverside County, Coachella Valley Area, California (South Area)
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
1/4/2024

Page 1 of 4 ends

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551810 551840 551870 551900 551930 551960 551990 552020 552050 552080 552110 552140 552170 551810 551840 551870 551900 551930 551960 551990 552020 552050 552080 552110 552140 552170 33° 46' 0'' N
116
°

2 6
'

2 5
'
'

W
33° 46' 0'' N
116
°

2 6
'

1 1
'
'

W
33° 45' 53'' N
11 6
°

2 6
'

2 5
'
'

W
33° 45' 53'' N
11 6
°

2 6
'

1 1
'
'

W
N
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 11N WGS84 0 50 100 200 300Feet
0 20 40 80 120Meters
Map Scale: 1:1,660 if printed on A landscape (11" x 8.5") sheet.

Soil Map may not be valid at this scale.
357USDA =

Warning: Soil Map may not be valid at this scale.

Please rely on the bar scale on each map sheet for map
measurements.

Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:

This product is generated from the USDA-NRCS certified data as of the version date(s) listed below.

Soil Survey Area: Riverside County, Coachella Valley Area, California
Survey Area Data: Version 15, Aug 30, 2023
Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.

Hydrologic Soil Group—Riverside County, Coachella Valley Area, California (South Area)
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
1/4/2024

Page 2 of 4358 ends

□
D
D
D
D
D
D
D
D
,,..,,,.
,,..,,,.
□
■
■
□
□
,,..._.,
t-+-t
~
tllWI ,..,,.
~
•

Hydrologic Soil Group
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI CpA Coachella fine sand, 0
to 2 percent slopes
A 7.1 100.0%
Totals for Area of Interest 7.1 100.0%
Description
Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms.

The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows:

These soils have a moderate rate of water transmission.

Rating Options
Aggregation Method: Dominant Condition
Component Percent Cutoff: None Specified
Hydrologic Soil Group—Riverside County, Coachella Valley Area, California South Area Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
1/4/2024

Page 3 of 4359 ends

USDA =

NOAA Atlas 14, Volume 6, Version 2
Location name: Rancho Mirage, California, USA*
Latitude: 33.767°, Longitude: -116.4389°
Elevation: 260 ft**
* source: ESRI Maps
** source: USGS

POINT PRECIPITATION FREQUENCY ESTIMATES
Sanja Perica, Sarah Dietz, Sarah Heim, Lillian Hiner, Kazungu Maitaria, Deborah Martin, Sandra Pavlovic, Ishani Roy, Carl Trypaluk, Dale Unruh, Fenglin Yan, Michael Yekta, Tan Zhao, Geoffrey Bonnin, Daniel Brewer, Li-Chuan Chen, Tye Parzybok, John Yarchoan NOAA, National Weather Service, Silver Spring, Maryland PF_tabular | PF_graphical | Maps_&_aerials
PF tabular
PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches)1 Duration Average recurrence interval (years)
1 2 5 10 25 50 100 200 500 1000
5-min 0.072
(0.060‑0.087)

0.117
(0.097‑0.142)

0.190
(0.157‑0.231)

0.260
(0.214‑0.319)

0.378
(0.301‑0.479)

0.488
(0.380‑0.632)

0.620
(0.471‑0.824)

0.800
(0.590‑1.09)

1.27 (0.901‑1.82)

1.81 (1.24‑2.68)
10-min 0.103
(0.086‑0.124)

0.168
(0.140‑0.203)

0.272
(0.226‑0.330)

0.373
(0.307‑0.458)

0.541
(0.431‑0.687)

0.699
(0.544‑0.906)

0.888
(0.675‑1.18)

1.15 (0.846‑1.57)

1.83 (1.29‑2.61)

2.60 (1.78‑3.84)
15-min 0.124
(0.104‑0.150)

0.203
(0.169‑0.246)

0.329
(0.273‑0.400)

0.451
(0.372‑0.553)

0.655
(0.521‑0.831)

0.845
(0.658‑1.10)

1.07 (0.816‑1.43)

1.39 (1.02‑1.90)

2.21 (1.56‑3.15)

3.14 (2.15‑4.65)
30-min 0.202
(0.169‑0.245)

0.330
(0.275‑0.400)

0.535
(0.444‑0.650)

0.734
(0.605‑0.900)

1.06 (0.848‑1.35)

1.38 (1.07‑1.78)

1.75 (1.33‑2.32)

2.26 (1.66‑3.09)

3.59 (2.54‑5.13)

5.12 (3.49‑7.56)
60-min 0.279
(0.233‑0.338)

0.455
(0.379‑0.552)

0.738
(0.613‑0.898)

1.01 (0.835‑1.24)

1.47 (1.17‑1.87)

1.90 (1.48‑2.46)

2.41 (1.83‑3.21)

3.12 (2.30‑4.26)

4.96 (3.51‑7.08)

7.06 (4.83‑10.4)
2-hr 0.374
(0.312‑0.453)

0.611
(0.509‑0.741)

0.969
(0.805‑1.18)

1.30 (1.07‑1.60)

1.82 (1.45‑2.31)

2.28 (1.77‑2.95)

2.80 (2.13‑3.72)

3.40 (2.51‑4.66)

5.01 (3.55‑7.15)

7.14 (4.87‑10.6)
3-hr 0.443
(0.369‑0.536)

0.721
(0.601‑0.875)

1.13 (0.940‑1.38)

1.50 (1.24‑1.84)

2.07 (1.65‑2.62)

2.56 (1.99‑3.31)

3.10 (2.36‑4.12)

3.72 (2.75‑5.09)

5.06 (3.58‑7.22)

7.21 (4.92‑10.7)
6-hr 0.593
(0.494‑0.718)

0.953
(0.794‑1.16)

1.47 (1.22‑1.79)

1.93 (1.59‑2.36)

2.60 (2.07‑3.30)

3.17 (2.47‑4.11)

3.79 (2.88‑5.04)

4.48 (3.31‑6.14)

5.51 (3.90‑7.86)

7.28 (4.97‑10.8)
12-hr 0.733
(0.611‑0.888)

1.16 (0.969‑1.41)

1.77 (1.47‑2.15)

2.30 (1.90‑2.82)

3.08 (2.45‑3.91)

3.72 (2.90‑4.83)

4.42 (3.36‑5.88)

5.19 (3.83‑7.10)

6.31 (4.46‑9.00)

7.35 (5.02‑10.9)
24-hr 0.867
(0.768‑1.00)

1.36 (1.20‑1.57)

2.06 (1.81‑2.38)

2.66 (2.33‑3.10)

3.54 (3.00‑4.26)

4.27 (3.54‑5.24)

5.05 (4.10‑6.36)

5.91 (4.66‑7.64)

7.16 (5.43‑9.63)

8.20 (6.02‑11.4)
2-day 0.996
(0.882‑1.15)

1.54 (1.36‑1.78)

2.32 (2.04‑2.68)

2.99 (2.62‑3.49)

3.98 (3.37‑4.80)

4.80 (3.99‑5.90)

5.69 (4.62‑7.16)

6.67 (5.26‑8.62)

8.09 (6.14‑10.9)

9.28 (6.81‑12.9)
3-day 1.06
(0.937‑1.22)

1.63 (1.44‑1.88)

2.44 (2.15‑2.83)

3.16 (2.76‑3.68)

4.21 (3.57‑5.07)

5.09 (4.23‑6.26)

6.05 (4.91‑7.62)

7.11 (5.62‑9.20)

8.67 (6.58‑11.7)

9.99 (7.33‑13.9)
4-day 1.09
(0.966‑1.26)

1.67 (1.48‑1.93)

2.51 (2.21‑2.90)

3.24 (2.84‑3.78)

4.33 (3.67‑5.22)

5.24 (4.35‑6.44)

6.24 (5.06‑7.85)

7.34 (5.80‑9.49)

8.97 (6.80‑12.1)

10.4 (7.59‑14.4)
7-day 1.19
(1.05‑1.37)

1.82 (1.61‑2.10)

2.73 (2.40‑3.16)

3.52 (3.08‑4.11)

4.71 (3.99‑5.67)

5.70 (4.73‑7.00)

6.78 (5.50‑8.54)

7.98 (6.30‑10.3)

9.76 (7.40‑13.1)

11.3 (8.25‑15.7)
10-day 1.26
(1.11‑1.45)

1.93 (1.70‑2.22)

2.89 (2.55‑3.34)

3.74 (3.27‑4.36)

5.00 (4.24‑6.02)

6.06 (5.03‑7.44)

7.21 (5.84‑9.07)

8.48 (6.70‑11.0)

10.4 (7.86‑14.0)

12.0 (8.77‑16.6)
20-day 1.38
(1.22‑1.60)

2.14 (1.89‑2.47)

3.23 (2.85‑3.74)

4.20 (3.67‑4.90)

5.65 (4.78‑6.80)

6.86 (5.70‑8.44)

8.20 (6.65‑10.3)

9.68 (7.64‑12.5)

11.9 (9.00‑16.0)

13.7 (10.1‑19.1)
30-day 1.55
(1.37‑1.79)

2.42 (2.14‑2.79)

3.68 (3.24‑4.26)

4.80 (4.20‑5.61)

6.49 (5.50‑7.82)

7.92 (6.57‑9.73)

9.48 (7.69‑11.9)

11.2 (8.86‑14.5)

13.8 (10.5‑18.6)

16.0 (11.7‑22.3)
45-day 1.70
(1.51‑1.97)

2.69 (2.38‑3.10)

4.12 (3.64‑4.77)

5.41 (4.73‑6.32)

7.36 (6.24‑8.86)

9.02 (7.48‑11.1)

10.8 (8.79‑13.6)

12.9 (10.2‑16.7)

15.9 (12.1‑21.4)

18.5 (13.6‑25.8)
60-day 1.83
(1.62‑2.11)

2.91 (2.58‑3.36)

4.50 (3.97‑5.22)

5.94 (5.20‑6.93)

8.12 (6.88‑9.77)

9.98 (8.28‑12.3)

12.0 (9.76‑15.1)

14.3 (11.3‑18.5)

17.8 (13.5‑24.0)

20.8 (15.2‑28.9)
1 Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS).

Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates(for a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at upperbounds are not checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values.

Please refer to NOAA Atlas 14 document for more information.

Back to Top
PF graphical
360
------
D i I II I
C II II~
C II II~
C II II~
C II II~
C II II~
C II II~
C II II~
C II II~
C II II~
C II II~
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lat itude : 33 .7670 °, Long it u de : -116.4389"
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NOAA Atlas 14, Vol ume 6, Versio n 2 Create --ti! 4-6-Clay 12-llr 0-clay
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Large scale map
Large scale aerial
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US Department of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
National Water Center
1325 East West Highway
Silver Spring, MD 20910
Questions?: [email protected]
Disclaimer
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LABEL TOP BANK ELEV. (ALL CORNERS)
100 YR. SURFACE ELEV@
MAX. DEPTH FS=1.

DESIGN CRITERIA
MAX. PERGOLA TION RA TE = 1 "/HR.

MAX. DEPTH AT PEAK STORAGE = 5'
FACTOR OF SAFETY F.S. = 1.0 MINIMUM
~
. I
~
1' MIN. •FREEBOARD"

FROM BUILDING PAD
ONE FOOT MINIMUM 11FREEBOARD 11 BELOW LOWEST BUILDING PAD TO MAXIM/UM WATER LEVEL THE BASIN SHALL BE DESIGNED TO RETAIN THE RUNOFF FROM THE WORST CASE OF THE 1 HR., J HR. 6 HR., OR 24 HR. DURATION, 100 YEAR FREQUENCY STORM.

SEE SHT. 2 OF 2 FOR MINIMUM PLAN REQUIREMENTS
* SLOPES STEEPER THAN 5: 1 WILL REQUIRE EROSION CONTROL APPROVED BY THE CITY ENGINEER. (TYPICAL EROSION CONTROL CONSISTS OF CONTINUOUS GROUND COVER LIKE GRASS, OR WASHED ROCK WITH A DIAMETER OF 1• OR LARGER, PLACED TO A DEPTH OF J" OVER WEED BARRIER CLOTH.)

CITY OF RANCHO MIRAGE
REVISIONS RETENTION BASIN • 7/5/2012

CITY ENGINEER DA TE

STANDARD
DETAIL
310
SHT. 1 OF 2

364

CITY OF RANCHO MIRAGE
~
AT A MINIMUM. PLANS SHALL INCLUDE THE FOLLOWING INFORMATION:

1. BOUNDARY (LOT LINES) INCLUDING BEARING AND DISTANCES

2. SLOPE SYMBOLS, OR FINISH CONTOURS, WITH SLOPE RA nos OR PERCENTAGES * 3. ELEVA noN LABELS FOR: BOTTOM, WATER SURFACE AT VOL. MAX. FOR 100YR. STORM, AND TOP (HYDROLOGY CALCULA DONS SHALL BE SUBMITTED VERIFYING BASIN AREA, DEPTH, AND VOLUME.)

4. DIMENSIONS (LENGTH, WIDTH AND DEPTH) OR SCALED ORA WING.

5. FINISHED SURFACE ELEVATIONS FOR IDENTIFYING THE FLOW PATHS

6. RIP-RAP OR APPROPRIATE EROSION CONTROL IF SLOPES EXCEED 20% (5: 1)

7. ANY STRUCTURES, PIPES, HEADWALLS, RIP-RAP, DRY'NELLS, ETC. SHOWN WITH

REFERENCE TO STREET PLANS, STORM DRAIN PLANS, OR GRADING PLANS (A DRY'NELL IS RECOMMENDED FOR LARGER RETENTION BASINS AS A WAY OF INTERCEPTING nNU/SANCE WATER' THAT MIGHT CAUSE A CONSTANT SWAMPY AREA TO DEVELOP IN THE RETENTION BASIN. FLOWS TO CVWD CHANNELS OR TO LAKES TYPICALLY REQUIRE A DRY'NELL TO INTERCEPT STREET RUNOFF. MAINTENANCE IS EASIEST IF THE DRY'NELL IS NEAR THE STREET SO VACUUM TRUCKS CAN ACCESS THEM.

SEE STANDARD DRAWINGS 306 AND 311.)

CITY OF RANCHO MIRAGE
R:~5;;0~NS RETENTION BASIN NOTES
1----------1~8~ ENGINE'?~~~'}TE

STANDARD
DETAIL
310
SHT. 2 OF 2

365

ACTUAL IMPERVIOUS COVER
Land Use (1)
Natural or Agriculture
Single Family Residential: (3)
40,000 s. F. (1 Acre) Lots
20,000 s. F. (~ Acre) Lots
7,200 -10,000 s. F. Lots
Multiple Family Residential:

Condominiums
Apartments
Mobile Horne Park
Commercial, Downtown
Business or Industrial
Notes:

Range-Percent
0 -10
10 -25
30 -45
45 -55
45 -70
65 -90
60 -85
80 -100
Recommended Value
For Average
conditions-Percent(2
0 20
40 50
65 80
75 90

1. Land use should be based on ultimate development of the watershed.

Long range master plans for the County and incorporated cities should be reviewed to insure reasonable land use assumptions.

2. Recommended values are based on average conditions which may not apply to a particular study area. The percentage impervious may vary greatly even on comparable sized lots due to differences in dwelling size, improvements, etc. Landscape practices should also be considered as it is common in some areas to use ornamental grav els underlain by impervious plastic materials in place of lawns and shrubs. A field investigation of a study area should always be made, and a review of aerial photos, where available may assist in estimat ing the percentage of impervious cover in developed areas.

3. For typical horse ranch subdivisions increase impervious area 5 per cent over the values recormnended in the table above.

RCFC a WCD

HYDROLOGY NJANUAL

IMPERVIOUS COVER
FOR

DEVELOPED AREAS
PLATE 0-5.6

366

RUNOFF INDEX NUMBERS OF HYDROLOGIC SOIL-COVER COMPLEXES FOR PERVIOUS AREAS-AMC II Cover Type (3)

NATURAL COVERS -
Barren
(Rockland, eroded and graded land)
Chaparrel, Broadleaf
(Manzonita, ceanothus and scrub oak)
Chaparrel, Narrowleaf
(Chamise and redshank)
Grass, Annual or Perennial
Meadows or Cienegas
(Areas with seasonally high water table,
principal vegetation is sod forming grass)
Open Brush
(Soft wood shrubs -buckwheat, sage, etc.)
Woodland
(Coniferous or broadleaf trees predominate.

Canopy density is at least 50 percent)
Woodland, Grass
(Coniferous or broadleaf trees with canopy
density from 20 to 50 percent)

URBAN COVERS -
Residential or Commercial Landscaping
(Lawn, shrubs, etc.)
Turf
(Irrigated and mowed grass)

AGRICULTURAL COVERS -
Fallow
(Land plowed but not tilled or seeded)
Quality of Soil Group
1------..-=.--t Cover (2) A B C D
Poor
Fair
Good
Poor
Fair
Poor
Fair
Good
Poor
Fair
Good
Poor
Fair
Good
Poor
Fair
Good
Poor
Fair
Good
Good
Poor
Fair
Good
78 86 91 93
53 70
40 63
31 57
71 82
55 72
67 78
50 69
38 61
63 77
51 70
30 58
62 76
46 66
41 63
45 66
36 60
28 55
57 73
44 65
33 58
80 85
75 81
71 78
88 91
81 86
86 89
79 84
74 80
85 88
80 84
72 78
84 88
77 83
75 81
77 83
73 79
70 77
82 86
77 82
72 79
32 56 69 75
58 74 83 87
44 65 77 82
33 58 72 79
76 85 90 92
RCFC a WCD
HYDROLOGY .NJA NUAL

RUNOFF INDEX
FOR

PERVIOUS

NUMBERS
AREA
PLATE D-5.5 (I of 2)

367
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1 of 6
HYDROLOGY CALCULATIONS - program updated 4-14-22 LC
Using the RCFC&WCD Short Cut Unit Hydrograph Method
Area Designations Area 1 VERSION 2
Area=1.00ac+0.09ac typ street frontage=1.09ac
5/7/2024 LOT 1
Drainage Area (ac.)1.0900 JOB NUMBER 22106
Unit time (minutes)5 5 5 15
100 Year Storm Duration (hrs)1 3 6 24
Total Precipitation (Plates D-4.4,E-5.2, 5.4, 5.6)(in.)2.41 3.10 3.79 5.05 from NOAA interactive website Soils Group A
AMC index II Runoff Number (plate E-6.1)32
Plate E-6.2 Pervious Area Loss Rate (Fp)(in/hr)0.74 (AMC II) Percentage of Impervious Cover (Ai)(%) (plate E-6.3)26.6 20% per the RCFC Hydrology Manual 1AC LOT-PLATE D 5.6 AND 0.09AC TYPICAL STREET FRONTAGE Weighted Average Loss Rate (F=Fp(1-.9Ai))(in./hr.)0.56 (used for 1, 3, and 6 hour storm, the 24 hour storm uses variable maximum loss rate per plate E-1.1 (3 of 6)) Low Loss Rate Percent (%) 90
Retention Basin Percolation Rate (in/hr)0.01 (also used for drywell percolation rate) Percolation is taken incrementally.

Basin volume is calculated using the "truncated pyramid" formula, a more conservative estimate than "averaged end areas" sometimes used (Drywell can be "zeroed out" by reducing numbers to less than .001, but should not entered as zeros or program chokes.) Drywell storage includes 40% of the 1' wide rock bed surrounding the drywell: formula (upper)*PI()*(diam/2)^2+(lower)*PI()*((diam/2)^2+0.4*((diam/2+(grav+0.4166))^2-(diam/2+0.4166)^2)) The drywell wall thickness is assumed at 5" (0.4166) and the gravel bed width is variable "grav" Drywell is zeroed out by reducing to 0.001 since there is none.

Drywell design factors Upper sec. (ft.)=0.001 Lower sec. (ft.)=0.001 Ring diam. (ft.) =0.001 Drywell lower max. (cf)=0.00 Upper max.(cf)=0.00 Gravel bed width around drywell=0.001 Drywell total(cf)=0.00 Ret. Basin design (area, depth) Top =3702 s.f.Bot. =1062 s.f.Max. Depth (d)=4 Max. storage=8995.74 (d/3)*(bottom+top+(bottom*top)^0.50) Formulas vol=(h/3)*(bottom+top+(bottom*top)^0.50) area=bottom+(h/d)*(top-bottom)h=(vol*3)/(bottom+top+(bottom*top)^0.5)(values must be non-zero or error occurs) Outside input from:N/A 3.25
1 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 3.7 1.0700 0.5628 N/A 0.5072 0.5575 167.24 0.00 0.00 0.00 0.00 0.00 167.24 1062.00 0.07 167.16 0.07 0.00 0.00 0:10 4.8 1.3882 0.5628 N/A 0.8253 0.9071 272.13 0.00 0.00 0.00 0.00 0.00 272.13 1111.06 0.08 439.21 0.20 0.00 0.00 0:15 5.1 1.4749 0.5628 N/A 0.9121 1.0024 300.73 0.00 0.00 0.00 0.00 0.00 300.73 1190.90 0.08 739.86 0.33 0.00 0.00 0:20 4.9 1.4171 0.5628 N/A 0.8542 0.9389 281.66 0.00 0.00 0.00 0.00 0.00 281.66 1279.13 0.09 1021.44 0.45 0.00 0.00 0:25 6.6 1.9087 0.5628 N/A 1.3459 1.4792 443.77 0.00 0.00 0.00 0.00 0.00 443.77 1361.76 0.09 1465.11 0.65 0.00 0.00 0:30 7.3 2.1112 0.5628 N/A 1.5483 1.7017 510.52 0.00 0.00 0.00 0.00 0.00 510.52 1491.97 0.10 1975.53 0.88 0.00 0.00 0:35 8.4 2.4293 0.5628 N/A 1.8664 2.0514 615.41 0.00 0.00 0.00 0.00 0.00 615.41 1641.76 0.11 2590.82 1.15 0.00 0.00 0:40 9 2.6028 0.5628 N/A 2.0400 2.2421 672.62 0.00 0.00 0.00 0.00 0.00 672.62 1822.33 0.13 3263.32 1.45 0.00 0.00 0:45 12.3 3.5572 0.5628 N/A 2.9943 3.2910 987.30 0.00 0.00 0.00 0.00 0.00 987.30 2019.69 0.14 4250.48 1.89 0.00 0.00 0:50 17.6 5.0899 0.5628 N/A 4.5271 4.9756 1492.69 0.00 0.00 0.00 0.00 0.00 1492.69 2309.40 0.16 5743.01 2.55 0.00 0.00 0:55 16.1 4.6561 0.5628 N/A 4.0933 4.4989 1349.66 0.00 0.00 0.00 0.00 0.00 1349.66 2747.41 0.19 7092.48 3.15 0.00 0.00 1:00 4.2 1.2146 0.5628 N/A 0.6518 0.7164 214.91 0.00 0.00 0.00 0.00 0.00 214.91 3143.44 0.22 7307.17 3.25 0.00 0.00 MAX DEPTH 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3206.45 0.22 7306.95 3.25 0.00 0.00 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3206.39 0.22 7306.73 3.25 0.00 0.00 1:15 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3206.32 0.22 7306.50 3.25 0.00 0.00 Total volume (cf)7308.64 Total Overflow (cf)0.00
368
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2 of 6
3 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 1.3 0.48 0.56 0.44 0.0484 0.0532 15.95 0.00 0.00 0.00 0.00 0.00 15.95 1062.00 0.07 15.87 0.01 0.00 0.00 0:10 1.3 0.48 0.56 0.44 0.0484 0.0532 15.95 0.00 0.00 0.00 0.00 0.00 15.95 1066.66 0.07 31.74 0.01 0.00 0.00 0:15 1.1 0.41 0.56 0.37 0.0409 0.0450 13.49 0.00 0.00 0.00 0.00 0.00 13.49 1071.32 0.07 45.16 0.02 0.00 0.00 0:20 1.5 0.56 0.56 0.50 0.0558 0.0613 18.40 0.00 0.00 0.00 0.00 0.00 18.40 1075.25 0.07 63.49 0.03 0.00 0.00 0:25 1.5 0.56 0.56 0.50 0.0558 0.0613 18.40 0.00 0.00 0.00 0.00 0.00 18.40 1080.63 0.08 81.81 0.04 0.00 0.00 0:30 1.8 0.67 0.56 N/A 0.1068 0.1173 35.20 0.00 0.00 0.00 0.00 0.00 35.20 1086.01 0.08 116.93 0.05 0.00 0.00 0:35 1.5 0.56 0.56 0.50 0.0558 0.0613 18.40 0.00 0.00 0.00 0.00 0.00 18.40 1096.32 0.08 135.26 0.06 0.00 0.00 0:40 1.8 0.67 0.56 N/A 0.1068 0.1173 35.20 0.00 0.00 0.00 0.00 0.00 35.20 1101.69 0.08 170.38 0.08 0.00 0.00 0:45 1.8 0.67 0.56 N/A 0.1068 0.1173 35.20 0.00 0.00 0.00 0.00 0.00 35.20 1112.00 0.08 205.50 0.09 0.00 0.00 0:50 1.5 0.56 0.56 0.50 0.0558 0.0613 18.40 0.00 0.00 0.00 0.00 0.00 18.40 1122.31 0.08 223.82 0.10 0.00 0.00 0:55 1.6 0.60 0.56 0.54 0.0595 0.0654 19.63 0.00 0.00 0.00 0.00 0.00 19.63 1127.69 0.08 243.37 0.11 0.00 0.00 1:00 1.8 0.67 0.56 N/A 0.1068 0.1173 35.20 0.00 0.00 0.00 0.00 0.00 35.20 1133.42 0.08 278.49 0.12 0.00 0.00 1:05 2.2 0.82 0.56 N/A 0.2556 0.2809 84.26 0.00 0.00 0.00 0.00 0.00 84.26 1143.73 0.08 362.68 0.16 0.00 0.00 1:10 2.2 0.82 0.56 N/A 0.2556 0.2809 84.26 0.00 0.00 0.00 0.00 0.00 84.26 1168.44 0.08 446.86 0.20 0.00 0.00 1:15 2.2 0.82 0.56 N/A 0.2556 0.2809 84.26 0.00 0.00 0.00 0.00 0.00 84.26 1193.14 0.08 531.04 0.24 0.00 0.00 1:20 2 0.74 0.56 N/A 0.1812 0.1991 59.73 0.00 0.00 0.00 0.00 0.00 59.73 1217.84 0.08 590.68 0.26 0.00 0.00 1:25 2.6 0.97 0.56 N/A 0.4044 0.4444 133.33 0.00 0.00 0.00 0.00 0.00 133.33 1235.35 0.09 723.93 0.32 0.00 0.00 1:30 2.7 1.00 0.56 N/A 0.4416 0.4853 145.59 0.00 0.00 0.00 0.00 0.00 145.59 1274.45 0.09 869.43 0.39 0.00 0.00 1:35 2.4 0.89 0.56 N/A 0.3300 0.3626 108.79 0.00 0.00 0.00 0.00 0.00 108.79 1317.15 0.09 978.13 0.43 0.00 0.00 1:40 2.7 1.00 0.56 N/A 0.4416 0.4853 145.59 0.00 0.00 0.00 0.00 0.00 145.59 1349.05 0.09 1123.63 0.50 0.00 0.00 1:45 3.3 1.23 0.56 N/A 0.6648 0.7306 219.19 0.00 0.00 0.00 0.00 0.00 219.19 1391.75 0.10 1342.72 0.60 0.00 0.00 1:50 3.1 1.15 0.56 N/A 0.5904 0.6489 194.66 0.00 0.00 0.00 0.00 0.00 194.66 1456.05 0.10 1537.27 0.68 0.00 0.00 1:55 2.9 1.08 0.56 N/A 0.5160 0.5671 170.12 0.00 0.00 0.00 0.00 0.00 170.12 1513.15 0.11 1707.29 0.76 0.00 0.00 2:00 3 1.12 0.56 N/A 0.5532 0.6080 182.39 0.00 0.00 0.00 0.00 0.00 182.39 1563.04 0.11 1889.57 0.84 0.00 0.00 2:05 3.1 1.15 0.56 N/A 0.5904 0.6489 194.66 0.00 0.00 0.00 0.00 0.00 194.66 1616.54 0.11 2084.12 0.93 0.00 0.00 2:10 4.2 1.56 0.56 N/A 0.9996 1.0986 329.58 0.00 0.00 0.00 0.00 0.00 329.58 1673.63 0.12 2413.58 1.07 0.00 0.00 2:15 5 1.86 0.56 N/A 1.2972 1.4257 427.70 0.00 0.00 0.00 0.00 0.00 427.70 1770.32 0.12 2841.16 1.26 0.00 0.00 2:20 3.5 1.30 0.56 N/A 0.7392 0.8124 243.72 0.00 0.00 0.00 0.00 0.00 243.72 1895.80 0.13 3084.75 1.37 0.00 0.00 2:25 6.8 2.53 0.56 N/A 1.9668 2.1616 648.49 0.00 0.00 0.00 0.00 0.00 648.49 1967.29 0.14 3733.10 1.66 0.00 0.00 2:30 7.3 2.72 0.56 N/A 2.1528 2.3661 709.82 0.00 0.00 0.00 0.00 0.00 709.82 2157.56 0.15 4442.77 1.98 0.00 0.00 2:35 8.2 3.05 0.56 N/A 2.4876 2.7340 820.21 0.00 0.00 0.00 0.00 0.00 820.21 2365.83 0.16 5262.81 2.34 0.00 0.00 2:40 5.9 2.19 0.56 N/A 1.6320 1.7937 538.10 0.00 0.00 0.00 0.00 0.00 538.10 2606.49 0.18 5800.73 2.58 0.00 0.00 2:45 2 0.74 0.56 N/A 0.1812 0.1991 59.73 0.00 0.00 0.00 0.00 0.00 59.73 2764.35 0.19 5860.27 2.61 0.00 0.00 2:50 1.8 0.67 0.56 N/A 0.1068 0.1173 35.20 0.00 0.00 0.00 0.00 0.00 35.20 2781.83 0.19 5895.27 2.62 0.00 0.00 2:55 1.8 0.67 0.56 N/A 0.1068 0.1173 35.20 0.00 0.00 0.00 0.00 0.00 35.20 2792.10 0.19 5930.28 2.64 0.00 0.00 3:00 0.6 0.22 0.56 0.20 0.0223 0.0245 7.36 0.00 0.00 0.00 0.00 0.00 7.36 2802.37 0.19 5937.45 2.64 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2804.47 0.19 5937.25 2.64 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2804.42 0.19 5937.06 2.64 0.00 0.00 3:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2804.36 0.19 5936.86 2.64 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2804.30 0.19 5936.67 2.64 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2804.25 0.19 5936.47 2.64 0.00 0.00 3:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2804.19 0.19 5936.28 2.64 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2804.13 0.19 5936.08 2.64 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2804.07 0.19 5935.89 2.64 0.00 0.00 Total volume (cf)5941.35 Total Overflow (cf)0.00
369

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6 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 0.5 0.23 0.56 0.20 0.0227 0.0250 7.50 0.00 0.00 0.00 0.00 0.00 7.50 1062.00 0.07 7.42 0.00 0.00 0.00 0:10 0.6 0.27 0.56 0.25 0.0273 0.0300 9.00 0.00 0.00 0.00 0.00 0.00 9.00 1064.18 0.07 16.35 0.01 0.00 0.00 0:15 0.6 0.27 0.56 0.25 0.0273 0.0300 9.00 0.00 0.00 0.00 0.00 0.00 9.00 1066.80 0.07 25.27 0.01 0.00 0.00 0:20 0.6 0.27 0.56 0.25 0.0273 0.0300 9.00 0.00 0.00 0.00 0.00 0.00 9.00 1069.42 0.07 34.19 0.02 0.00 0.00 0:25 0.6 0.27 0.56 0.25 0.0273 0.0300 9.00 0.00 0.00 0.00 0.00 0.00 9.00 1072.04 0.07 43.12 0.02 0.00 0.00 0:30 0.7 0.32 0.56 0.29 0.0318 0.0350 10.50 0.00 0.00 0.00 0.00 0.00 10.50 1074.65 0.07 53.54 0.02 0.00 0.00 0:35 0.7 0.32 0.56 0.29 0.0318 0.0350 10.50 0.00 0.00 0.00 0.00 0.00 10.50 1077.71 0.07 63.96 0.03 0.00 0.00 0:40 0.7 0.32 0.56 0.29 0.0318 0.0350 10.50 0.00 0.00 0.00 0.00 0.00 10.50 1080.77 0.08 74.38 0.03 0.00 0.00 0:45 0.7 0.32 0.56 0.29 0.0318 0.0350 10.50 0.00 0.00 0.00 0.00 0.00 10.50 1083.83 0.08 84.81 0.04 0.00 0.00 0:50 0.7 0.32 0.56 0.29 0.0318 0.0350 10.50 0.00 0.00 0.00 0.00 0.00 10.50 1086.89 0.08 95.23 0.04 0.00 0.00 0:55 0.7 0.32 0.56 0.29 0.0318 0.0350 10.50 0.00 0.00 0.00 0.00 0.00 10.50 1089.95 0.08 105.65 0.05 0.00 0.00 1:00 0.8 0.36 0.56 0.33 0.0364 0.0400 12.00 0.00 0.00 0.00 0.00 0.00 12.00 1093.01 0.08 117.57 0.05 0.00 0.00 1:05 0.8 0.36 0.56 0.33 0.0364 0.0400 12.00 0.00 0.00 0.00 0.00 0.00 12.00 1096.50 0.08 129.49 0.06 0.00 0.00 1:10 0.8 0.36 0.56 0.33 0.0364 0.0400 12.00 0.00 0.00 0.00 0.00 0.00 12.00 1100.00 0.08 141.41 0.06 0.00 0.00 1:15 0.8 0.36 0.56 0.33 0.0364 0.0400 12.00 0.00 0.00 0.00 0.00 0.00 12.00 1103.50 0.08 153.33 0.07 0.00 0.00 1:20 0.8 0.36 0.56 0.33 0.0364 0.0400 12.00 0.00 0.00 0.00 0.00 0.00 12.00 1107.00 0.08 165.25 0.07 0.00 0.00 1:25 0.8 0.36 0.56 0.33 0.0364 0.0400 12.00 0.00 0.00 0.00 0.00 0.00 12.00 1110.50 0.08 177.17 0.08 0.00 0.00 1:30 0.8 0.36 0.56 0.33 0.0364 0.0400 12.00 0.00 0.00 0.00 0.00 0.00 12.00 1113.99 0.08 189.09 0.08 0.00 0.00 1:35 0.8 0.36 0.56 0.33 0.0364 0.0400 12.00 0.00 0.00 0.00 0.00 0.00 12.00 1117.49 0.08 201.01 0.09 0.00 0.00 1:40 0.8 0.36 0.56 0.33 0.0364 0.0400 12.00 0.00 0.00 0.00 0.00 0.00 12.00 1120.99 0.08 212.93 0.09 0.00 0.00 1:45 0.8 0.36 0.56 0.33 0.0364 0.0400 12.00 0.00 0.00 0.00 0.00 0.00 12.00 1124.49 0.08 224.85 0.10 0.00 0.00 1:50 0.8 0.36 0.56 0.33 0.0364 0.0400 12.00 0.00 0.00 0.00 0.00 0.00 12.00 1127.99 0.08 236.76 0.11 0.00 0.00 1:55 0.8 0.36 0.56 0.33 0.0364 0.0400 12.00 0.00 0.00 0.00 0.00 0.00 12.00 1131.48 0.08 248.68 0.11 0.00 0.00 2:00 0.9 0.41 0.56 0.37 0.0409 0.0450 13.50 0.00 0.00 0.00 0.00 0.00 13.50 1134.98 0.08 262.10 0.12 0.00 0.00 2:05 0.8 0.36 0.56 0.33 0.0364 0.0400 12.00 0.00 0.00 0.00 0.00 0.00 12.00 1138.92 0.08 274.02 0.12 0.00 0.00 2:10 0.9 0.41 0.56 0.37 0.0409 0.0450 13.50 0.00 0.00 0.00 0.00 0.00 13.50 1142.42 0.08 287.44 0.13 0.00 0.00 2:15 0.9 0.41 0.56 0.37 0.0409 0.0450 13.50 0.00 0.00 0.00 0.00 0.00 13.50 1146.35 0.08 300.85 0.13 0.00 0.00 2:20 0.9 0.41 0.56 0.37 0.0409 0.0450 13.50 0.00 0.00 0.00 0.00 0.00 13.50 1150.29 0.08 314.27 0.14 0.00 0.00 2:25 0.9 0.41 0.56 0.37 0.0409 0.0450 13.50 0.00 0.00 0.00 0.00 0.00 13.50 1154.23 0.08 327.68 0.15 0.00 0.00 2:30 0.9 0.41 0.56 0.37 0.0409 0.0450 13.50 0.00 0.00 0.00 0.00 0.00 13.50 1158.17 0.08 341.10 0.15 0.00 0.00 2:35 0.9 0.41 0.56 0.37 0.0409 0.0450 13.50 0.00 0.00 0.00 0.00 0.00 13.50 1162.10 0.08 354.52 0.16 0.00 0.00 2:40 0.9 0.41 0.56 0.37 0.0409 0.0450 13.50 0.00 0.00 0.00 0.00 0.00 13.50 1166.04 0.08 367.93 0.16 0.00 0.00 2:45 1 0.45 0.56 0.41 0.0455 0.0500 15.00 0.00 0.00 0.00 0.00 0.00 15.00 1169.98 0.08 382.85 0.17 0.00 0.00 2:50 1 0.45 0.56 0.41 0.0455 0.0500 15.00 0.00 0.00 0.00 0.00 0.00 15.00 1174.35 0.08 397.76 0.18 0.00 0.00 2:55 1 0.45 0.56 0.41 0.0455 0.0500 15.00 0.00 0.00 0.00 0.00 0.00 15.00 1178.73 0.08 412.67 0.18 0.00 0.00 3:00 1 0.45 0.56 0.41 0.0455 0.0500 15.00 0.00 0.00 0.00 0.00 0.00 15.00 1183.11 0.08 427.59 0.19 0.00 0.00 3:05 1 0.45 0.56 0.41 0.0455 0.0500 15.00 0.00 0.00 0.00 0.00 0.00 15.00 1187.49 0.08 442.50 0.20 0.00 0.00 3:10 1.1 0.50 0.56 0.45 0.0500 0.0550 16.50 0.00 0.00 0.00 0.00 0.00 16.50 1191.86 0.08 458.91 0.20 0.00 0.00 3:15 1.1 0.50 0.56 0.45 0.0500 0.0550 16.50 0.00 0.00 0.00 0.00 0.00 16.50 1196.68 0.08 475.33 0.21 0.00 0.00 3:20 1.1 0.50 0.56 0.45 0.0500 0.0550 16.50 0.00 0.00 0.00 0.00 0.00 16.50 1201.50 0.08 491.74 0.22 0.00 0.00 3:25 1.2 0.55 0.56 0.49 0.0546 0.0600 18.00 0.00 0.00 0.00 0.00 0.00 18.00 1206.31 0.08 509.65 0.23 0.00 0.00 3:30 1.3 0.59 0.56 0.53 0.0591 0.0650 19.49 0.00 0.00 0.00 0.00 0.00 19.49 1211.57 0.08 529.06 0.24 0.00 0.00 3:35 1.4 0.64 0.56 N/A 0.0739 0.0812 24.36 0.00 0.00 0.00 0.00 0.00 24.36 1217.26 0.08 553.33 0.25 0.00 0.00 3:40 1.4 0.64 0.56 N/A 0.0739 0.0812 24.36 0.00 0.00 0.00 0.00 0.00 24.36 1224.39 0.09 577.61 0.26 0.00 0.00 3:45 1.5 0.68 0.56 N/A 0.1194 0.1312 39.35 0.00 0.00 0.00 0.00 0.00 39.35 1231.51 0.09 616.88 0.27 0.00 0.00 3:50 1.5 0.68 0.56 N/A 0.1194 0.1312 39.35 0.00 0.00 0.00 0.00 0.00 39.35 1243.04 0.09 656.15 0.29 0.00 0.00 3:55 1.6 0.73 0.56 N/A 0.1648 0.1812 54.35 0.00 0.00 0.00 0.00 0.00 54.35 1254.56 0.09 710.41 0.32 0.00 0.00 4:00 1.6 0.73 0.56 N/A 0.1648 0.1812 54.35 0.00 0.00 0.00 0.00 0.00 54.35 1270.49 0.09 764.67 0.34 0.00 0.00 4:05 1.7 0.77 0.56 N/A 0.2103 0.2312 69.35 0.00 0.00 0.00 0.00 0.00 69.35 1286.41 0.09 833.93 0.37 0.00 0.00 4:10 1.8 0.82 0.56 N/A 0.2558 0.2811 84.34 0.00 0.00 0.00 0.00 0.00 84.34 1306.73 0.09 918.18 0.41 0.00 0.00 4:15 1.9 0.86 0.56 N/A 0.3013 0.3311 99.34 0.00 0.00 0.00 0.00 0.00 99.34 1331.46 0.09 1017.43 0.45 0.00 0.00 370

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4:20 2 0.91 0.56 N/A 0.3468 0.3811 114.33 0.00 0.00 0.00 0.00 0.00 114.33 1360.59 0.09 1131.67 0.50 0.00 0.00 4:25 2.1 0.96 0.56 N/A 0.3922 0.4311 129.33 0.00 0.00 0.00 0.00 0.00 129.33 1394.11 0.10 1260.90 0.56 0.00 0.00 4:30 2.1 0.96 0.56 N/A 0.3922 0.4311 129.33 0.00 0.00 0.00 0.00 0.00 129.33 1432.04 0.10 1390.13 0.62 0.00 0.00 4:35 2.2 1.00 0.56 N/A 0.4377 0.4811 144.33 0.00 0.00 0.00 0.00 0.00 144.33 1469.96 0.10 1534.35 0.68 0.00 0.00 4:40 2.3 1.05 0.56 N/A 0.4832 0.5311 159.32 0.00 0.00 0.00 0.00 0.00 159.32 1512.29 0.11 1693.57 0.75 0.00 0.00 4:45 2.4 1.09 0.56 N/A 0.5287 0.5811 174.32 0.00 0.00 0.00 0.00 0.00 174.32 1559.02 0.11 1867.78 0.83 0.00 0.00 4:50 2.4 1.09 0.56 N/A 0.5287 0.5811 174.32 0.00 0.00 0.00 0.00 0.00 174.32 1610.14 0.11 2041.99 0.91 0.00 0.00 4:55 2.5 1.14 0.56 N/A 0.5742 0.6310 189.31 0.00 0.00 0.00 0.00 0.00 189.31 1661.27 0.12 2231.18 0.99 0.00 0.00 5:00 2.6 1.18 0.56 N/A 0.6196 0.6810 204.31 0.00 0.00 0.00 0.00 0.00 204.31 1716.79 0.12 2435.37 1.08 0.00 0.00 5:05 3.1 1.41 0.56 N/A 0.8470 0.9310 279.29 0.00 0.00 0.00 0.00 0.00 279.29 1776.71 0.12 2714.54 1.21 0.00 0.00 5:10 3.6 1.64 0.56 N/A 1.0744 1.1809 354.27 0.00 0.00 0.00 0.00 0.00 354.27 1858.64 0.13 3068.68 1.36 0.00 0.00 5:15 3.9 1.77 0.56 N/A 1.2109 1.3309 399.26 0.00 0.00 0.00 0.00 0.00 399.26 1962.57 0.14 3467.80 1.54 0.00 0.00 5:20 4.2 1.91 0.56 N/A 1.3473 1.4808 444.24 0.00 0.00 0.00 0.00 0.00 444.24 2079.70 0.14 3911.90 1.74 0.00 0.00 5:25 4.7 2.14 0.56 N/A 1.5747 1.7307 519.22 0.00 0.00 0.00 0.00 0.00 519.22 2210.03 0.15 4430.97 1.97 0.00 0.00 5:30 5.6 2.55 0.56 N/A 1.9840 2.1806 654.19 0.00 0.00 0.00 0.00 0.00 654.19 2362.37 0.16 5084.99 2.26 0.00 0.00 5:35 1.9 0.86 0.56 N/A 0.3013 0.3311 99.34 0.00 0.00 0.00 0.00 0.00 99.34 2554.30 0.18 5184.15 2.31 0.00 0.00 5:40 0.9 0.41 0.56 0.37 0.0409 0.0450 13.50 0.00 0.00 0.00 0.00 0.00 13.50 2583.40 0.18 5197.47 2.31 0.00 0.00 5:45 0.6 0.27 0.56 0.25 0.0273 0.0300 9.00 0.00 0.00 0.00 0.00 0.00 9.00 2587.31 0.18 5206.29 2.31 0.00 0.00 5:50 0.5 0.23 0.56 0.20 0.0227 0.0250 7.50 0.00 0.00 0.00 0.00 0.00 7.50 2589.90 0.18 5213.60 2.32 0.00 0.00 5:55 0.3 0.14 0.56 0.12 0.0136 0.0150 4.50 0.00 0.00 0.00 0.00 0.00 4.50 2592.05 0.18 5217.92 2.32 0.00 0.00 6:00 0.2 0.09 0.56 0.08 0.0091 0.0100 3.00 0.00 0.00 0.00 0.00 0.00 3.00 2593.31 0.18 5220.74 2.32 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2594.14 0.18 5220.56 2.32 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2594.09 0.18 5220.38 2.32 0.00 0.00 6:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2594.04 0.18 5220.20 2.32 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2593.98 0.18 5220.02 2.32 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2593.93 0.18 5219.84 2.32 0.00 0.00 6:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2593.88 0.18 5219.66 2.32 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2593.83 0.18 5219.48 2.32 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2593.77 0.18 5219.30 2.32 0.00 0.00 6:45 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2593.72 0.18 5219.12 2.32 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2593.67 0.18 5218.94 2.32 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2593.61 0.18 5218.76 2.32 0.00 0.00 7:00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2593.56 0.18 5218.58 2.32 0.00 0.00 Total volume (cf)5227.70 Total Overflow (cf)0.00
371

5 of 6
24 Hour Storm in 15 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:15 0.2 0.04 0.99 0.04 0.0040 0.0044 4.00 0.00 0.00 0.00 0.00 0.00 4.00 1062.00 0.22 3.78 0.00 0.00 0.00 0:30 0.3 0.06 0.98 0.05 0.0061 0.0067 5.99 0.00 0.00 0.00 0.00 0.00 5.99 1063.11 0.22 9.55 0.00 0.00 0.00 0:45 0.3 0.06 0.97 0.05 0.0061 0.0067 5.99 0.00 0.00 0.00 0.00 0.00 5.99 1064.80 0.22 15.32 0.01 0.00 0.00 1:00 0.4 0.08 0.95 0.07 0.0081 0.0089 7.99 0.00 0.00 0.00 0.00 0.00 7.99 1066.50 0.22 23.09 0.01 0.00 0.00 1:15 0.3 0.06 0.94 0.05 0.0061 0.0067 5.99 0.00 0.00 0.00 0.00 0.00 5.99 1068.78 0.22 28.86 0.01 0.00 0.00 1:30 0.3 0.06 0.93 0.05 0.0061 0.0067 5.99 0.00 0.00 0.00 0.00 0.00 5.99 1070.47 0.22 34.63 0.02 0.00 0.00 1:45 0.3 0.06 0.92 0.05 0.0061 0.0067 5.99 0.00 0.00 0.00 0.00 0.00 5.99 1072.16 0.22 40.41 0.02 0.00 0.00 2:00 0.4 0.08 0.91 0.07 0.0081 0.0089 7.99 0.00 0.00 0.00 0.00 0.00 7.99 1073.86 0.22 48.17 0.02 0.00 0.00 2:15 0.4 0.08 0.90 0.07 0.0081 0.0089 7.99 0.00 0.00 0.00 0.00 0.00 7.99 1076.14 0.22 55.94 0.02 0.00 0.00 2:30 0.4 0.08 0.89 0.07 0.0081 0.0089 7.99 0.00 0.00 0.00 0.00 0.00 7.99 1078.42 0.22 63.71 0.03 0.00 0.00 2:45 0.5 0.10 0.88 0.09 0.0101 0.0111 9.99 0.00 0.00 0.00 0.00 0.00 9.99 1080.70 0.23 73.48 0.03 0.00 0.00 3:00 0.5 0.10 0.87 0.09 0.0101 0.0111 9.99 0.00 0.00 0.00 0.00 0.00 9.99 1083.56 0.23 83.24 0.04 0.00 0.00 3:15 0.5 0.10 0.85 0.09 0.0101 0.0111 9.99 0.00 0.00 0.00 0.00 0.00 9.99 1086.43 0.23 93.00 0.04 0.00 0.00 3:30 0.5 0.10 0.84 0.09 0.0101 0.0111 9.99 0.00 0.00 0.00 0.00 0.00 9.99 1089.29 0.23 102.77 0.05 0.00 0.00 3:45 0.5 0.10 0.83 0.09 0.0101 0.0111 9.99 0.00 0.00 0.00 0.00 0.00 9.99 1092.16 0.23 112.53 0.05 0.00 0.00 4:00 0.6 0.12 0.82 0.11 0.0121 0.0133 11.99 0.00 0.00 0.00 0.00 0.00 11.99 1095.02 0.23 124.29 0.06 0.00 0.00 4:15 0.6 0.12 0.81 0.11 0.0121 0.0133 11.99 0.00 0.00 0.00 0.00 0.00 11.99 1098.48 0.23 136.05 0.06 0.00 0.00 4:30 0.7 0.14 0.80 0.13 0.0141 0.0155 13.99 0.00 0.00 0.00 0.00 0.00 13.99 1101.93 0.23 149.81 0.07 0.00 0.00 4:45 0.7 0.14 0.79 0.13 0.0141 0.0155 13.99 0.00 0.00 0.00 0.00 0.00 13.99 1105.96 0.23 163.57 0.07 0.00 0.00 5:00 0.8 0.16 0.78 0.15 0.0162 0.0178 15.99 0.00 0.00 0.00 0.00 0.00 15.99 1110.00 0.23 179.32 0.08 0.00 0.00 5:15 0.6 0.12 0.77 0.11 0.0121 0.0133 11.99 0.00 0.00 0.00 0.00 0.00 11.99 1114.63 0.23 191.08 0.08 0.00 0.00 5:30 0.7 0.14 0.76 0.13 0.0141 0.0155 13.99 0.00 0.00 0.00 0.00 0.00 13.99 1118.08 0.23 204.83 0.09 0.00 0.00 5:45 0.8 0.16 0.75 0.15 0.0162 0.0178 15.99 0.00 0.00 0.00 0.00 0.00 15.99 1122.11 0.23 220.58 0.10 0.00 0.00 6:00 0.8 0.16 0.74 0.15 0.0162 0.0178 15.99 0.00 0.00 0.00 0.00 0.00 15.99 1126.73 0.23 236.33 0.11 0.00 0.00 6:15 0.9 0.18 0.73 0.16 0.0182 0.0200 17.98 0.00 0.00 0.00 0.00 0.00 17.98 1131.36 0.24 254.08 0.11 0.00 0.00 6:30 0.9 0.18 0.72 0.16 0.0182 0.0200 17.98 0.00 0.00 0.00 0.00 0.00 17.98 1136.57 0.24 271.83 0.12 0.00 0.00 6:45 1 0.20 0.71 0.18 0.0202 0.0222 19.98 0.00 0.00 0.00 0.00 0.00 19.98 1141.77 0.24 291.57 0.13 0.00 0.00 7:00 1 0.20 0.70 0.18 0.0202 0.0222 19.98 0.00 0.00 0.00 0.00 0.00 19.98 1147.57 0.24 311.31 0.14 0.00 0.00 7:15 1 0.20 0.69 0.18 0.0202 0.0222 19.98 0.00 0.00 0.00 0.00 0.00 19.98 1153.36 0.24 331.05 0.15 0.00 0.00 7:30 1.1 0.22 0.68 0.20 0.0222 0.0244 21.98 0.00 0.00 0.00 0.00 0.00 21.98 1159.15 0.24 352.79 0.16 0.00 0.00 7:45 1.2 0.24 0.67 0.22 0.0242 0.0266 23.98 0.00 0.00 0.00 0.00 0.00 23.98 1165.53 0.24 376.53 0.17 0.00 0.00 8:00 1.3 0.26 0.66 0.24 0.0263 0.0289 25.98 0.00 0.00 0.00 0.00 0.00 25.98 1172.50 0.24 402.26 0.18 0.00 0.00 8:15 1.5 0.30 0.66 0.27 0.0303 0.0333 29.97 0.00 0.00 0.00 0.00 0.00 29.97 1180.05 0.25 431.98 0.19 0.00 0.00 8:30 1.5 0.30 0.65 0.27 0.0303 0.0333 29.97 0.00 0.00 0.00 0.00 0.00 29.97 1188.78 0.25 461.71 0.21 0.00 0.00 8:45 1.6 0.32 0.64 0.29 0.0323 0.0355 31.97 0.00 0.00 0.00 0.00 0.00 31.97 1197.50 0.25 493.43 0.22 0.00 0.00 9:00 1.7 0.34 0.63 0.31 0.0343 0.0377 33.97 0.00 0.00 0.00 0.00 0.00 33.97 1206.81 0.25 527.15 0.23 0.00 0.00 9:15 1.9 0.38 0.62 0.35 0.0384 0.0422 37.96 0.00 0.00 0.00 0.00 0.00 37.96 1216.70 0.25 564.86 0.25 0.00 0.00 9:30 2 0.40 0.61 0.36 0.0404 0.0444 39.96 0.00 0.00 0.00 0.00 0.00 39.96 1227.77 0.26 604.56 0.27 0.00 0.00 9:45 2.1 0.42 0.60 0.38 0.0424 0.0466 41.96 0.00 0.00 0.00 0.00 0.00 41.96 1239.42 0.26 646.27 0.29 0.00 0.00 10:00 2.2 0.44 0.59 0.40 0.0444 0.0488 43.96 0.00 0.00 0.00 0.00 0.00 43.96 1251.66 0.26 689.96 0.31 0.00 0.00 10:15 1.5 0.30 0.58 0.27 0.0303 0.0333 29.97 0.00 0.00 0.00 0.00 0.00 29.97 1264.49 0.26 719.67 0.32 0.00 0.00 10:30 1.5 0.30 0.58 0.27 0.0303 0.0333 29.97 0.00 0.00 0.00 0.00 0.00 29.97 1273.20 0.27 749.38 0.33 0.00 0.00 10:45 2 0.40 0.57 0.36 0.0404 0.0444 39.96 0.00 0.00 0.00 0.00 0.00 39.96 1281.92 0.27 789.07 0.35 0.00 0.00 11:00 2 0.40 0.56 0.36 0.0404 0.0444 39.96 0.00 0.00 0.00 0.00 0.00 39.96 1293.57 0.27 828.77 0.37 0.00 0.00 11:15 1.9 0.38 0.55 0.35 0.0384 0.0422 37.96 0.00 0.00 0.00 0.00 0.00 37.96 1305.22 0.27 866.46 0.39 0.00 0.00 11:30 1.9 0.38 0.54 0.35 0.0384 0.0422 37.96 0.00 0.00 0.00 0.00 0.00 37.96 1316.28 0.27 904.15 0.40 0.00 0.00 11:45 1.7 0.34 0.53 0.31 0.0343 0.0377 33.97 0.00 0.00 0.00 0.00 0.00 33.97 1327.34 0.28 937.84 0.42 0.00 0.00 12:00 1.8 0.36 0.53 0.33 0.0364 0.0400 35.97 0.00 0.00 0.00 0.00 0.00 35.97 1337.23 0.28 973.53 0.43 0.00 0.00 12:15 2.5 0.51 0.52 0.45 0.0505 0.0555 49.95 0.00 0.00 0.00 0.00 0.00 49.95 1347.70 0.28 1023.20 0.45 0.00 0.00 12:30 2.6 0.53 0.51 0.47 0.0525 0.0577 51.95 0.00 0.00 0.00 0.00 0.00 51.95 1362.28 0.28 1074.87 0.48 0.00 0.00 12:45 2.8 0.57 0.50 N/A 0.0622 0.0684 61.56 0.00 0.00 0.00 0.00 0.00 61.56 1377.44 0.29 1136.14 0.51 0.00 0.00 372

6 of 6
13:00 2.9 0.59 0.50 N/A 0.0900 0.0989 89.05 0.00 0.00 0.00 0.00 0.00 89.05 1395.43 0.29 1224.90 0.54 0.00 0.00 13:15 3.4 0.69 0.49 N/A 0.1985 0.2182 196.38 0.00 0.00 0.00 0.00 0.00 196.38 1421.48 0.30 1420.99 0.63 0.00 0.00 13:30 3.4 0.69 0.48 N/A 0.2059 0.2263 203.71 0.00 0.00 0.00 0.00 0.00 203.71 1479.02 0.31 1624.39 0.72 0.00 0.00 13:45 2.3 0.46 0.47 0.42 0.0465 0.0511 45.96 0.00 0.00 0.00 0.00 0.00 45.96 1538.71 0.32 1670.03 0.74 0.00 0.00 14:00 2.3 0.46 0.47 0.42 0.0465 0.0511 45.96 0.00 0.00 0.00 0.00 0.00 45.96 1552.11 0.32 1715.66 0.76 0.00 0.00 14:15 2.7 0.55 0.46 N/A 0.0862 0.0947 85.25 0.00 0.00 0.00 0.00 0.00 85.25 1565.50 0.33 1800.59 0.80 0.00 0.00 14:30 2.6 0.53 0.45 N/A 0.0730 0.0802 72.21 0.00 0.00 0.00 0.00 0.00 72.21 1590.42 0.33 1872.46 0.83 0.00 0.00 14:45 2.6 0.53 0.45 N/A 0.0799 0.0878 79.05 0.00 0.00 0.00 0.00 0.00 79.05 1611.52 0.34 1951.18 0.87 0.00 0.00 15:00 2.5 0.51 0.44 N/A 0.0665 0.0731 65.81 0.00 0.00 0.00 0.00 0.00 65.81 1634.62 0.34 2016.64 0.90 0.00 0.00 15:15 2.4 0.48 0.43 N/A 0.0530 0.0583 52.46 0.00 0.00 0.00 0.00 0.00 52.46 1653.83 0.34 2068.76 0.92 0.00 0.00 15:30 2.3 0.46 0.43 0.42 0.0465 0.0511 45.96 0.00 0.00 0.00 0.00 0.00 45.96 1669.12 0.35 2114.37 0.94 0.00 0.00 15:45 1.9 0.38 0.42 0.35 0.0384 0.0422 37.96 0.00 0.00 0.00 0.00 0.00 37.96 1682.51 0.35 2151.98 0.96 0.00 0.00 16:00 1.9 0.38 0.41 0.35 0.0384 0.0422 37.96 0.00 0.00 0.00 0.00 0.00 37.96 1693.55 0.35 2189.60 0.97 0.00 0.00 16:15 0.4 0.08 0.41 0.07 0.0081 0.0089 7.99 0.00 0.00 0.00 0.00 0.00 7.99 1704.59 0.36 2197.23 0.98 0.00 0.00 16:30 0.4 0.08 0.40 0.07 0.0081 0.0089 7.99 0.00 0.00 0.00 0.00 0.00 7.99 1706.83 0.36 2204.87 0.98 0.00 0.00 16:45 0.3 0.06 0.39 0.05 0.0061 0.0067 5.99 0.00 0.00 0.00 0.00 0.00 5.99 1709.07 0.36 2210.51 0.98 0.00 0.00 17:00 0.3 0.06 0.39 0.05 0.0061 0.0067 5.99 0.00 0.00 0.00 0.00 0.00 5.99 1710.72 0.36 2216.15 0.99 0.00 0.00 17:15 0.5 0.10 0.38 0.09 0.0101 0.0111 9.99 0.00 0.00 0.00 0.00 0.00 9.99 1712.38 0.36 2225.78 0.99 0.00 0.00 17:30 0.5 0.10 0.38 0.09 0.0101 0.0111 9.99 0.00 0.00 0.00 0.00 0.00 9.99 1715.20 0.36 2235.41 0.99 0.00 0.00 17:45 0.5 0.10 0.37 0.09 0.0101 0.0111 9.99 0.00 0.00 0.00 0.00 0.00 9.99 1718.03 0.36 2245.05 1.00 0.00 0.00 18:00 0.4 0.08 0.37 0.07 0.0081 0.0089 7.99 0.00 0.00 0.00 0.00 0.00 7.99 1720.86 0.36 2252.68 1.00 0.00 0.00 18:15 0.4 0.08 0.36 0.07 0.0081 0.0089 7.99 0.00 0.00 0.00 0.00 0.00 7.99 1723.10 0.36 2260.31 1.01 0.00 0.00 18:30 0.4 0.08 0.35 0.07 0.0081 0.0089 7.99 0.00 0.00 0.00 0.00 0.00 7.99 1725.34 0.36 2267.95 1.01 0.00 0.00 18:45 0.3 0.06 0.35 0.05 0.0061 0.0067 5.99 0.00 0.00 0.00 0.00 0.00 5.99 1727.58 0.36 2273.58 1.01 0.00 0.00 19:00 0.2 0.04 0.34 0.04 0.0040 0.0044 4.00 0.00 0.00 0.00 0.00 0.00 4.00 1729.23 0.36 2277.22 1.01 0.00 0.00 19:15 0.3 0.06 0.34 0.05 0.0061 0.0067 5.99 0.00 0.00 0.00 0.00 0.00 5.99 1730.30 0.36 2282.85 1.02 0.00 0.00 19:30 0.4 0.08 0.34 0.07 0.0081 0.0089 7.99 0.00 0.00 0.00 0.00 0.00 7.99 1731.95 0.36 2290.48 1.02 0.00 0.00 19:45 0.3 0.06 0.33 0.05 0.0061 0.0067 5.99 0.00 0.00 0.00 0.00 0.00 5.99 1734.19 0.36 2296.12 1.02 0.00 0.00 20:00 0.2 0.04 0.33 0.04 0.0040 0.0044 4.00 0.00 0.00 0.00 0.00 0.00 4.00 1735.85 0.36 2299.75 1.02 0.00 0.00 20:15 0.3 0.06 0.32 0.05 0.0061 0.0067 5.99 0.00 0.00 0.00 0.00 0.00 5.99 1736.91 0.36 2305.38 1.03 0.00 0.00 20:30 0.3 0.06 0.32 0.05 0.0061 0.0067 5.99 0.00 0.00 0.00 0.00 0.00 5.99 1738.57 0.36 2311.02 1.03 0.00 0.00 20:45 0.3 0.06 0.31 0.05 0.0061 0.0067 5.99 0.00 0.00 0.00 0.00 0.00 5.99 1740.22 0.36 2316.65 1.03 0.00 0.00 21:00 0.2 0.04 0.31 0.04 0.0040 0.0044 4.00 0.00 0.00 0.00 0.00 0.00 4.00 1741.87 0.36 2320.28 1.03 0.00 0.00 21:15 0.3 0.06 0.31 0.05 0.0061 0.0067 5.99 0.00 0.00 0.00 0.00 0.00 5.99 1742.94 0.36 2325.91 1.03 0.00 0.00 21:30 0.2 0.04 0.30 0.04 0.0040 0.0044 4.00 0.00 0.00 0.00 0.00 0.00 4.00 1744.59 0.36 2329.55 1.04 0.00 0.00 21:45 0.3 0.06 0.30 0.05 0.0061 0.0067 5.99 0.00 0.00 0.00 0.00 0.00 5.99 1745.66 0.36 2335.18 1.04 0.00 0.00 22:00 0.2 0.04 0.30 0.04 0.0040 0.0044 4.00 0.00 0.00 0.00 0.00 0.00 4.00 1747.31 0.36 2338.81 1.04 0.00 0.00 22:15 0.3 0.06 0.29 0.05 0.0061 0.0067 5.99 0.00 0.00 0.00 0.00 0.00 5.99 1748.38 0.36 2344.44 1.04 0.00 0.00 22:30 0.2 0.04 0.29 0.04 0.0040 0.0044 4.00 0.00 0.00 0.00 0.00 0.00 4.00 1750.03 0.36 2348.07 1.04 0.00 0.00 22:45 0.2 0.04 0.29 0.04 0.0040 0.0044 4.00 0.00 0.00 0.00 0.00 0.00 4.00 1751.09 0.36 2351.70 1.05 0.00 0.00 23:00 0.2 0.04 0.29 0.04 0.0040 0.0044 4.00 0.00 0.00 0.00 0.00 0.00 4.00 1752.16 0.37 2355.33 1.05 0.00 0.00 23:15 0.2 0.04 0.28 0.04 0.0040 0.0044 4.00 0.00 0.00 0.00 0.00 0.00 4.00 1753.22 0.37 2358.96 1.05 0.00 0.00 23:30 0.2 0.04 0.28 0.04 0.0040 0.0044 4.00 0.00 0.00 0.00 0.00 0.00 4.00 1754.29 0.37 2362.59 1.05 0.00 0.00 23:45 0.2 0.04 0.28 0.04 0.0040 0.0044 4.00 0.00 0.00 0.00 0.00 0.00 4.00 1755.36 0.37 2366.23 1.05 0.00 0.00 24:00 0.2 0.04 0.28 0.04 0.0040 0.0044 4.00 0.00 0.00 0.00 0.00 0.00 4.00 1756.42 0.37 2369.86 1.05 0.00 0.00 0 0.00 0.28 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1757.49 0.37 2369.49 1.05 0.00 0.00 Total volume (cf)2398.09 Total Overflow (cf)0.00
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HYDROLOGY CALCULATIONS - program updated 4-14-22 LC
Using the RCFC&WCD Short Cut Unit Hydrograph Method
Area Designations Area 1 VERSION 2 Area=1.07ac+0.09ac typ street frontage=1.16ac 5/7/2024 LOT 2
Drainage Area (ac.)1.1600 JOB NUMBER 22106
Unit time (minutes)5 5 5 15
100 Year Storm Duration (hrs)1 3 6 24
Total Precipitation (Plates D-4.4,E-5.2, 5.4, 5.6)(in.)2.41 3.10 3.79 5.05 from NOAA interactive website Soils Group A
AMC index II Runoff Number (plate E-6.1)32
Plate E-6.2 Pervious Area Loss Rate (Fp)(in/hr)0.74 (AMC II) Percentage of Impervious Cover (Ai)(%) (plate E-6.3)26.6 20% per the RCFC Hydrology Manual 1AC LOT-PLATE D 5.6 AND 0.09AC TYPICAL STREET FRONTAGE Weighted Average Loss Rate (F=Fp(1-.9Ai))(in./hr.)0.56 (used for 1, 3, and 6 hour storm, the 24 hour storm uses variable maximum loss rate per plate E-1.1 (3 of 6)) Low Loss Rate Percent (%) 90
Retention Basin Percolation Rate (in/hr)0.01 (also used for drywell percolation rate) Percolation is taken incrementally.

Drywell design factors Upper sec. (ft.)=0.001 Lower sec. (ft.)=0.001 Ring diam. (ft.) =0.001 Drywell lower max. (cf)=0.00 Upper max.(cf)=0.00 Gravel bed width around drywell=0.001 Drywell total(cf)=0.00 Ret. Basin design (area, depth) Top =3234 s.f.Bot. =1078 s.f.Max. Depth (d)=4 Max. storage=8238.87 (d/3)*(bottom+top+(bottom*top)^0.50) Formulas vol=(h/3)*(bottom+top+(bottom*top)^0.50) area=bottom+(h/d)*(top-bottom)h=(vol*3)/(bottom+top+(bottom*top)^0.5)(values must be non-zero or error occurs) Outside input from:N/A 3.25
1 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 3.7 1.0700 0.5628 N/A 0.5072 0.5933 177.98 0.00 0.00 0.00 0.00 0.00 177.98 1078.00 0.07 177.90 0.09 0.00 0.00 0:10 4.8 1.3882 0.5628 N/A 0.8253 0.9653 289.60 0.00 0.00 0.00 0.00 0.00 289.60 1124.55 0.08 467.43 0.23 0.00 0.00 0:15 5.1 1.4749 0.5628 N/A 0.9121 1.0668 320.05 0.00 0.00 0.00 0.00 0.00 320.05 1200.32 0.08 787.39 0.38 0.00 0.00 0:20 4.9 1.4171 0.5628 N/A 0.8542 0.9992 299.75 0.00 0.00 0.00 0.00 0.00 299.75 1284.05 0.09 1087.05 0.53 0.00 0.00 0:25 6.6 1.9087 0.5628 N/A 1.3459 1.5742 472.27 0.00 0.00 0.00 0.00 0.00 472.27 1362.47 0.09 1559.23 0.76 0.00 0.00 0:30 7.3 2.1112 0.5628 N/A 1.5483 1.8110 543.30 0.00 0.00 0.00 0.00 0.00 543.30 1486.03 0.10 2102.43 1.02 0.00 0.00 0:35 8.4 2.4293 0.5628 N/A 1.8664 2.1831 654.93 0.00 0.00 0.00 0.00 0.00 654.93 1628.18 0.11 2757.25 1.34 0.00 0.00 0:40 9 2.6028 0.5628 N/A 2.0400 2.3861 715.82 0.00 0.00 0.00 0.00 0.00 715.82 1799.53 0.12 3472.94 1.69 0.00 0.00 0:45 12.3 3.5572 0.5628 N/A 2.9943 3.5024 1050.71 0.00 0.00 0.00 0.00 0.00 1050.71 1986.82 0.14 4523.51 2.20 0.00 0.00 0:50 17.6 5.0899 0.5628 N/A 4.5271 5.2952 1588.55 0.00 0.00 0.00 0.00 0.00 1588.55 2261.74 0.16 6111.90 2.97 0.00 0.00 0:55 16.1 4.6561 0.5628 N/A 4.0933 4.7878 1436.33 0.00 0.00 0.00 0.00 0.00 1436.33 2677.40 0.19 7548.05 3.66 0.00 0.00 1:00 4.2 1.2146 0.5628 N/A 0.6518 0.7624 228.72 0.00 0.00 0.00 0.00 0.00 228.72 3053.22 0.21 7776.55 3.78 0.00 0.00 MAX DEPTH 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3113.02 0.22 7776.33 3.78 0.00 0.00 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3112.96 0.22 7776.12 3.78 0.00 0.00 1:15 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3112.90 0.22 7775.90 3.78 0.00 0.00 Total volume (cf)7778.00 Total Overflow (cf)0.00
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3 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 1.3 0.48 0.56 0.44 0.0484 0.0566 16.97 0.00 0.00 0.00 0.00 0.00 16.97 1078.00 0.07 16.89 0.01 0.00 0.00 0:10 1.3 0.48 0.56 0.44 0.0484 0.0566 16.97 0.00 0.00 0.00 0.00 0.00 16.97 1082.42 0.08 33.79 0.02 0.00 0.00 0:15 1.1 0.41 0.56 0.37 0.0409 0.0479 14.36 0.00 0.00 0.00 0.00 0.00 14.36 1086.84 0.08 48.07 0.02 0.00 0.00 0:20 1.5 0.56 0.56 0.50 0.0558 0.0653 19.58 0.00 0.00 0.00 0.00 0.00 19.58 1090.58 0.08 67.58 0.03 0.00 0.00 0:25 1.5 0.56 0.56 0.50 0.0558 0.0653 19.58 0.00 0.00 0.00 0.00 0.00 19.58 1095.68 0.08 87.08 0.04 0.00 0.00 0:30 1.8 0.67 0.56 N/A 0.1068 0.1249 37.46 0.00 0.00 0.00 0.00 0.00 37.46 1100.79 0.08 124.47 0.06 0.00 0.00 0:35 1.5 0.56 0.56 0.50 0.0558 0.0653 19.58 0.00 0.00 0.00 0.00 0.00 19.58 1110.57 0.08 143.97 0.07 0.00 0.00 0:40 1.8 0.67 0.56 N/A 0.1068 0.1249 37.46 0.00 0.00 0.00 0.00 0.00 37.46 1115.67 0.08 181.35 0.09 0.00 0.00 0:45 1.8 0.67 0.56 N/A 0.1068 0.1249 37.46 0.00 0.00 0.00 0.00 0.00 37.46 1125.46 0.08 218.73 0.11 0.00 0.00 0:50 1.5 0.56 0.56 0.50 0.0558 0.0653 19.58 0.00 0.00 0.00 0.00 0.00 19.58 1135.24 0.08 238.24 0.12 0.00 0.00 0:55 1.6 0.60 0.56 0.54 0.0595 0.0696 20.89 0.00 0.00 0.00 0.00 0.00 20.89 1140.34 0.08 259.04 0.13 0.00 0.00 1:00 1.8 0.67 0.56 N/A 0.1068 0.1249 37.46 0.00 0.00 0.00 0.00 0.00 37.46 1145.79 0.08 296.42 0.14 0.00 0.00 1:05 2.2 0.82 0.56 N/A 0.2556 0.2989 89.67 0.00 0.00 0.00 0.00 0.00 89.67 1155.57 0.08 386.02 0.19 0.00 0.00 1:10 2.2 0.82 0.56 N/A 0.2556 0.2989 89.67 0.00 0.00 0.00 0.00 0.00 89.67 1179.02 0.08 475.61 0.23 0.00 0.00 1:15 2.2 0.82 0.56 N/A 0.2556 0.2989 89.67 0.00 0.00 0.00 0.00 0.00 89.67 1202.46 0.08 565.20 0.27 0.00 0.00 1:20 2 0.74 0.56 N/A 0.1812 0.2119 63.57 0.00 0.00 0.00 0.00 0.00 63.57 1225.91 0.09 628.68 0.31 0.00 0.00 1:25 2.6 0.97 0.56 N/A 0.4044 0.4730 141.89 0.00 0.00 0.00 0.00 0.00 141.89 1242.52 0.09 770.49 0.37 0.00 0.00 1:30 2.7 1.00 0.56 N/A 0.4416 0.5165 154.94 0.00 0.00 0.00 0.00 0.00 154.94 1279.63 0.09 925.34 0.45 0.00 0.00 1:35 2.4 0.89 0.56 N/A 0.3300 0.3859 115.78 0.00 0.00 0.00 0.00 0.00 115.78 1320.15 0.09 1041.03 0.51 0.00 0.00 1:40 2.7 1.00 0.56 N/A 0.4416 0.5165 154.94 0.00 0.00 0.00 0.00 0.00 154.94 1350.42 0.09 1195.88 0.58 0.00 0.00 1:45 3.3 1.23 0.56 N/A 0.6648 0.7775 233.26 0.00 0.00 0.00 0.00 0.00 233.26 1390.94 0.10 1429.04 0.69 0.00 0.00 1:50 3.1 1.15 0.56 N/A 0.5904 0.6905 207.16 0.00 0.00 0.00 0.00 0.00 207.16 1451.96 0.10 1636.10 0.79 0.00 0.00 1:55 2.9 1.08 0.56 N/A 0.5160 0.6035 181.05 0.00 0.00 0.00 0.00 0.00 181.05 1506.14 0.10 1817.04 0.88 0.00 0.00 2:00 3 1.12 0.56 N/A 0.5532 0.6470 194.10 0.00 0.00 0.00 0.00 0.00 194.10 1553.50 0.11 2011.04 0.98 0.00 0.00 2:05 3.1 1.15 0.56 N/A 0.5904 0.6905 207.16 0.00 0.00 0.00 0.00 0.00 207.16 1604.26 0.11 2218.08 1.08 0.00 0.00 2:10 4.2 1.56 0.56 N/A 0.9996 1.1691 350.74 0.00 0.00 0.00 0.00 0.00 350.74 1658.44 0.12 2568.71 1.25 0.00 0.00 2:15 5 1.86 0.56 N/A 1.2972 1.5172 455.17 0.00 0.00 0.00 0.00 0.00 455.17 1750.20 0.12 3023.76 1.47 0.00 0.00 2:20 3.5 1.30 0.56 N/A 0.7392 0.8646 259.37 0.00 0.00 0.00 0.00 0.00 259.37 1869.28 0.13 3283.00 1.59 0.00 0.00 2:25 6.8 2.53 0.56 N/A 1.9668 2.3004 690.13 0.00 0.00 0.00 0.00 0.00 690.13 1937.12 0.13 3973.00 1.93 0.00 0.00 2:30 7.3 2.72 0.56 N/A 2.1528 2.5180 755.40 0.00 0.00 0.00 0.00 0.00 755.40 2117.68 0.15 4728.26 2.30 0.00 0.00 2:35 8.2 3.05 0.56 N/A 2.4876 2.9096 872.88 0.00 0.00 0.00 0.00 0.00 872.88 2315.32 0.16 5600.98 2.72 0.00 0.00 2:40 5.9 2.19 0.56 N/A 1.6320 1.9088 572.65 0.00 0.00 0.00 0.00 0.00 572.65 2543.70 0.18 6173.46 3.00 0.00 0.00 2:45 2 0.74 0.56 N/A 0.1812 0.2119 63.57 0.00 0.00 0.00 0.00 0.00 63.57 2693.51 0.19 6236.84 3.03 0.00 0.00 2:50 1.8 0.67 0.56 N/A 0.1068 0.1249 37.46 0.00 0.00 0.00 0.00 0.00 37.46 2710.10 0.19 6274.11 3.05 0.00 0.00 2:55 1.8 0.67 0.56 N/A 0.1068 0.1249 37.46 0.00 0.00 0.00 0.00 0.00 37.46 2719.85 0.19 6311.38 3.06 0.00 0.00 3:00 0.6 0.22 0.56 0.20 0.0223 0.0261 7.83 0.00 0.00 0.00 0.00 0.00 7.83 2729.60 0.19 6319.02 3.07 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2731.60 0.19 6318.83 3.07 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2731.55 0.19 6318.64 3.07 0.00 0.00 3:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2731.50 0.19 6318.45 3.07 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2731.45 0.19 6318.26 3.07 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2731.40 0.19 6318.07 3.07 0.00 0.00 3:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2731.35 0.19 6317.89 3.07 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2731.30 0.19 6317.70 3.07 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2731.26 0.19 6317.51 3.07 0.00 0.00 Total volume (cf)6322.90 Total Overflow (cf)0.00
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6 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 0.5 0.23 0.56 0.20 0.0227 0.0266 7.98 0.00 0.00 0.00 0.00 0.00 7.98 1078.00 0.07 7.90 0.00 0.00 0.00 0:10 0.6 0.27 0.56 0.25 0.0273 0.0319 9.58 0.00 0.00 0.00 0.00 0.00 9.58 1080.07 0.08 17.40 0.01 0.00 0.00 0:15 0.6 0.27 0.56 0.25 0.0273 0.0319 9.58 0.00 0.00 0.00 0.00 0.00 9.58 1082.55 0.08 26.91 0.01 0.00 0.00 0:20 0.6 0.27 0.56 0.25 0.0273 0.0319 9.58 0.00 0.00 0.00 0.00 0.00 9.58 1085.04 0.08 36.41 0.02 0.00 0.00 0:25 0.6 0.27 0.56 0.25 0.0273 0.0319 9.58 0.00 0.00 0.00 0.00 0.00 9.58 1087.53 0.08 45.90 0.02 0.00 0.00 0:30 0.7 0.32 0.56 0.29 0.0318 0.0372 11.17 0.00 0.00 0.00 0.00 0.00 11.17 1090.01 0.08 57.00 0.03 0.00 0.00 0:35 0.7 0.32 0.56 0.29 0.0318 0.0372 11.17 0.00 0.00 0.00 0.00 0.00 11.17 1092.92 0.08 68.10 0.03 0.00 0.00 0:40 0.7 0.32 0.56 0.29 0.0318 0.0372 11.17 0.00 0.00 0.00 0.00 0.00 11.17 1095.82 0.08 79.19 0.04 0.00 0.00 0:45 0.7 0.32 0.56 0.29 0.0318 0.0372 11.17 0.00 0.00 0.00 0.00 0.00 11.17 1098.72 0.08 90.29 0.04 0.00 0.00 0:50 0.7 0.32 0.56 0.29 0.0318 0.0372 11.17 0.00 0.00 0.00 0.00 0.00 11.17 1101.63 0.08 101.38 0.05 0.00 0.00 0:55 0.7 0.32 0.56 0.29 0.0318 0.0372 11.17 0.00 0.00 0.00 0.00 0.00 11.17 1104.53 0.08 112.48 0.05 0.00 0.00 1:00 0.8 0.36 0.56 0.33 0.0364 0.0426 12.77 0.00 0.00 0.00 0.00 0.00 12.77 1107.43 0.08 125.17 0.06 0.00 0.00 1:05 0.8 0.36 0.56 0.33 0.0364 0.0426 12.77 0.00 0.00 0.00 0.00 0.00 12.77 1110.75 0.08 137.86 0.07 0.00 0.00 1:10 0.8 0.36 0.56 0.33 0.0364 0.0426 12.77 0.00 0.00 0.00 0.00 0.00 12.77 1114.07 0.08 150.55 0.07 0.00 0.00 1:15 0.8 0.36 0.56 0.33 0.0364 0.0426 12.77 0.00 0.00 0.00 0.00 0.00 12.77 1117.40 0.08 163.23 0.08 0.00 0.00 1:20 0.8 0.36 0.56 0.33 0.0364 0.0426 12.77 0.00 0.00 0.00 0.00 0.00 12.77 1120.72 0.08 175.92 0.09 0.00 0.00 1:25 0.8 0.36 0.56 0.33 0.0364 0.0426 12.77 0.00 0.00 0.00 0.00 0.00 12.77 1124.04 0.08 188.61 0.09 0.00 0.00 1:30 0.8 0.36 0.56 0.33 0.0364 0.0426 12.77 0.00 0.00 0.00 0.00 0.00 12.77 1127.36 0.08 201.30 0.10 0.00 0.00 1:35 0.8 0.36 0.56 0.33 0.0364 0.0426 12.77 0.00 0.00 0.00 0.00 0.00 12.77 1130.68 0.08 213.99 0.10 0.00 0.00 1:40 0.8 0.36 0.56 0.33 0.0364 0.0426 12.77 0.00 0.00 0.00 0.00 0.00 12.77 1134.00 0.08 226.68 0.11 0.00 0.00 1:45 0.8 0.36 0.56 0.33 0.0364 0.0426 12.77 0.00 0.00 0.00 0.00 0.00 12.77 1137.32 0.08 239.37 0.12 0.00 0.00 1:50 0.8 0.36 0.56 0.33 0.0364 0.0426 12.77 0.00 0.00 0.00 0.00 0.00 12.77 1140.64 0.08 252.06 0.12 0.00 0.00 1:55 0.8 0.36 0.56 0.33 0.0364 0.0426 12.77 0.00 0.00 0.00 0.00 0.00 12.77 1143.96 0.08 264.74 0.13 0.00 0.00 2:00 0.9 0.41 0.56 0.37 0.0409 0.0479 14.36 0.00 0.00 0.00 0.00 0.00 14.36 1147.28 0.08 279.03 0.14 0.00 0.00 2:05 0.8 0.36 0.56 0.33 0.0364 0.0426 12.77 0.00 0.00 0.00 0.00 0.00 12.77 1151.02 0.08 291.71 0.14 0.00 0.00 2:10 0.9 0.41 0.56 0.37 0.0409 0.0479 14.36 0.00 0.00 0.00 0.00 0.00 14.36 1154.34 0.08 306.00 0.15 0.00 0.00 2:15 0.9 0.41 0.56 0.37 0.0409 0.0479 14.36 0.00 0.00 0.00 0.00 0.00 14.36 1158.08 0.08 320.28 0.16 0.00 0.00 2:20 0.9 0.41 0.56 0.37 0.0409 0.0479 14.36 0.00 0.00 0.00 0.00 0.00 14.36 1161.81 0.08 334.56 0.16 0.00 0.00 2:25 0.9 0.41 0.56 0.37 0.0409 0.0479 14.36 0.00 0.00 0.00 0.00 0.00 14.36 1165.55 0.08 348.84 0.17 0.00 0.00 2:30 0.9 0.41 0.56 0.37 0.0409 0.0479 14.36 0.00 0.00 0.00 0.00 0.00 14.36 1169.29 0.08 363.13 0.18 0.00 0.00 2:35 0.9 0.41 0.56 0.37 0.0409 0.0479 14.36 0.00 0.00 0.00 0.00 0.00 14.36 1173.02 0.08 377.41 0.18 0.00 0.00 2:40 0.9 0.41 0.56 0.37 0.0409 0.0479 14.36 0.00 0.00 0.00 0.00 0.00 14.36 1176.76 0.08 391.69 0.19 0.00 0.00 2:45 1 0.45 0.56 0.41 0.0455 0.0532 15.96 0.00 0.00 0.00 0.00 0.00 15.96 1180.50 0.08 407.57 0.20 0.00 0.00 2:50 1 0.45 0.56 0.41 0.0455 0.0532 15.96 0.00 0.00 0.00 0.00 0.00 15.96 1184.65 0.08 423.44 0.21 0.00 0.00 2:55 1 0.45 0.56 0.41 0.0455 0.0532 15.96 0.00 0.00 0.00 0.00 0.00 15.96 1188.81 0.08 439.32 0.21 0.00 0.00 3:00 1 0.45 0.56 0.41 0.0455 0.0532 15.96 0.00 0.00 0.00 0.00 0.00 15.96 1192.96 0.08 455.19 0.22 0.00 0.00 3:05 1 0.45 0.56 0.41 0.0455 0.0532 15.96 0.00 0.00 0.00 0.00 0.00 15.96 1197.12 0.08 471.07 0.23 0.00 0.00 3:10 1.1 0.50 0.56 0.45 0.0500 0.0585 17.55 0.00 0.00 0.00 0.00 0.00 17.55 1201.27 0.08 488.54 0.24 0.00 0.00 3:15 1.1 0.50 0.56 0.45 0.0500 0.0585 17.55 0.00 0.00 0.00 0.00 0.00 17.55 1205.84 0.08 506.01 0.25 0.00 0.00 3:20 1.1 0.50 0.56 0.45 0.0500 0.0585 17.55 0.00 0.00 0.00 0.00 0.00 17.55 1210.42 0.08 523.48 0.25 0.00 0.00 3:25 1.2 0.55 0.56 0.49 0.0546 0.0638 19.15 0.00 0.00 0.00 0.00 0.00 19.15 1214.99 0.08 542.55 0.26 0.00 0.00 3:30 1.3 0.59 0.56 0.53 0.0591 0.0692 20.75 0.00 0.00 0.00 0.00 0.00 20.75 1219.98 0.08 563.21 0.27 0.00 0.00 3:35 1.4 0.64 0.56 N/A 0.0739 0.0864 25.92 0.00 0.00 0.00 0.00 0.00 25.92 1225.38 0.09 589.05 0.29 0.00 0.00 3:40 1.4 0.64 0.56 N/A 0.0739 0.0864 25.92 0.00 0.00 0.00 0.00 0.00 25.92 1232.15 0.09 614.89 0.30 0.00 0.00 3:45 1.5 0.68 0.56 N/A 0.1194 0.1396 41.88 0.00 0.00 0.00 0.00 0.00 41.88 1238.91 0.09 656.68 0.32 0.00 0.00 3:50 1.5 0.68 0.56 N/A 0.1194 0.1396 41.88 0.00 0.00 0.00 0.00 0.00 41.88 1249.85 0.09 698.48 0.34 0.00 0.00 3:55 1.6 0.73 0.56 N/A 0.1648 0.1928 57.84 0.00 0.00 0.00 0.00 0.00 57.84 1260.78 0.09 756.23 0.37 0.00 0.00 4:00 1.6 0.73 0.56 N/A 0.1648 0.1928 57.84 0.00 0.00 0.00 0.00 0.00 57.84 1275.90 0.09 813.98 0.40 0.00 0.00 4:05 1.7 0.77 0.56 N/A 0.2103 0.2460 73.80 0.00 0.00 0.00 0.00 0.00 73.80 1291.01 0.09 887.69 0.43 0.00 0.00 4:10 1.8 0.82 0.56 N/A 0.2558 0.2992 89.76 0.00 0.00 0.00 0.00 0.00 89.76 1310.30 0.09 977.36 0.47 0.00 0.00 4:15 1.9 0.86 0.56 N/A 0.3013 0.3524 105.72 0.00 0.00 0.00 0.00 0.00 105.72 1333.76 0.09 1082.99 0.53 0.00 0.00 376

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4:20 2 0.91 0.56 N/A 0.3468 0.4056 121.68 0.00 0.00 0.00 0.00 0.00 121.68 1361.40 0.09 1204.57 0.58 0.00 0.00 4:25 2.1 0.96 0.56 N/A 0.3922 0.4588 137.64 0.00 0.00 0.00 0.00 0.00 137.64 1393.22 0.10 1342.11 0.65 0.00 0.00 4:30 2.1 0.96 0.56 N/A 0.3922 0.4588 137.64 0.00 0.00 0.00 0.00 0.00 137.64 1429.21 0.10 1479.64 0.72 0.00 0.00 4:35 2.2 1.00 0.56 N/A 0.4377 0.5120 153.59 0.00 0.00 0.00 0.00 0.00 153.59 1465.20 0.10 1633.14 0.79 0.00 0.00 4:40 2.3 1.05 0.56 N/A 0.4832 0.5652 169.55 0.00 0.00 0.00 0.00 0.00 169.55 1505.37 0.10 1802.59 0.88 0.00 0.00 4:45 2.4 1.09 0.56 N/A 0.5287 0.6184 185.51 0.00 0.00 0.00 0.00 0.00 185.51 1549.71 0.11 1987.99 0.97 0.00 0.00 4:50 2.4 1.09 0.56 N/A 0.5287 0.6184 185.51 0.00 0.00 0.00 0.00 0.00 185.51 1598.23 0.11 2173.39 1.06 0.00 0.00 4:55 2.5 1.14 0.56 N/A 0.5742 0.6716 201.47 0.00 0.00 0.00 0.00 0.00 201.47 1646.75 0.11 2374.75 1.15 0.00 0.00 5:00 2.6 1.18 0.56 N/A 0.6196 0.7248 217.43 0.00 0.00 0.00 0.00 0.00 217.43 1699.44 0.12 2592.06 1.26 0.00 0.00 5:05 3.1 1.41 0.56 N/A 0.8470 0.9907 297.22 0.00 0.00 0.00 0.00 0.00 297.22 1756.31 0.12 2889.16 1.40 0.00 0.00 5:10 3.6 1.64 0.56 N/A 1.0744 1.2567 377.02 0.00 0.00 0.00 0.00 0.00 377.02 1834.06 0.13 3266.06 1.59 0.00 0.00 5:15 3.9 1.77 0.56 N/A 1.2109 1.4163 424.90 0.00 0.00 0.00 0.00 0.00 424.90 1932.68 0.13 3690.82 1.79 0.00 0.00 5:20 4.2 1.91 0.56 N/A 1.3473 1.5759 472.77 0.00 0.00 0.00 0.00 0.00 472.77 2043.84 0.14 4163.45 2.02 0.00 0.00 5:25 4.7 2.14 0.56 N/A 1.5747 1.8419 552.57 0.00 0.00 0.00 0.00 0.00 552.57 2167.52 0.15 4715.87 2.29 0.00 0.00 5:30 5.6 2.55 0.56 N/A 1.9840 2.3207 696.20 0.00 0.00 0.00 0.00 0.00 696.20 2312.08 0.16 5411.91 2.63 0.00 0.00 5:35 1.9 0.86 0.56 N/A 0.3013 0.3524 105.72 0.00 0.00 0.00 0.00 0.00 105.72 2494.22 0.17 5517.45 2.68 0.00 0.00 5:40 0.9 0.41 0.56 0.37 0.0409 0.0479 14.36 0.00 0.00 0.00 0.00 0.00 14.36 2521.84 0.18 5531.64 2.69 0.00 0.00 5:45 0.6 0.27 0.56 0.25 0.0273 0.0319 9.58 0.00 0.00 0.00 0.00 0.00 9.58 2525.55 0.18 5541.04 2.69 0.00 0.00 5:50 0.5 0.23 0.56 0.20 0.0227 0.0266 7.98 0.00 0.00 0.00 0.00 0.00 7.98 2528.01 0.18 5548.84 2.69 0.00 0.00 5:55 0.3 0.14 0.56 0.12 0.0136 0.0160 4.79 0.00 0.00 0.00 0.00 0.00 4.79 2530.06 0.18 5553.45 2.70 0.00 0.00 6:00 0.2 0.09 0.56 0.08 0.0091 0.0106 3.19 0.00 0.00 0.00 0.00 0.00 3.19 2531.26 0.18 5556.47 2.70 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2532.05 0.18 5556.29 2.70 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2532.01 0.18 5556.12 2.70 0.00 0.00 6:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2531.96 0.18 5555.94 2.70 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2531.91 0.18 5555.77 2.70 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2531.87 0.18 5555.59 2.70 0.00 0.00 6:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2531.82 0.18 5555.41 2.70 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2531.78 0.18 5555.24 2.70 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2531.73 0.18 5555.06 2.70 0.00 0.00 6:45 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2531.68 0.18 5554.89 2.70 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2531.64 0.18 5554.71 2.70 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2531.59 0.18 5554.54 2.70 0.00 0.00 7:00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2531.55 0.18 5554.36 2.70 0.00 0.00 Total volume (cf)5563.43 Total Overflow (cf)0.00
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24 Hour Storm in 15 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:15 0.2 0.04 0.99 0.04 0.0040 0.0047 4.25 0.00 0.00 0.00 0.00 0.00 4.25 1078.00 0.22 4.03 0.00 0.00 0.00 0:30 0.3 0.06 0.98 0.05 0.0061 0.0071 6.38 0.00 0.00 0.00 0.00 0.00 6.38 1079.05 0.22 10.18 0.00 0.00 0.00 0:45 0.3 0.06 0.97 0.05 0.0061 0.0071 6.38 0.00 0.00 0.00 0.00 0.00 6.38 1080.66 0.23 16.34 0.01 0.00 0.00 1:00 0.4 0.08 0.95 0.07 0.0081 0.0095 8.51 0.00 0.00 0.00 0.00 0.00 8.51 1082.28 0.23 24.62 0.01 0.00 0.00 1:15 0.3 0.06 0.94 0.05 0.0061 0.0071 6.38 0.00 0.00 0.00 0.00 0.00 6.38 1084.44 0.23 30.77 0.01 0.00 0.00 1:30 0.3 0.06 0.93 0.05 0.0061 0.0071 6.38 0.00 0.00 0.00 0.00 0.00 6.38 1086.05 0.23 36.92 0.02 0.00 0.00 1:45 0.3 0.06 0.92 0.05 0.0061 0.0071 6.38 0.00 0.00 0.00 0.00 0.00 6.38 1087.66 0.23 43.08 0.02 0.00 0.00 2:00 0.4 0.08 0.91 0.07 0.0081 0.0095 8.51 0.00 0.00 0.00 0.00 0.00 8.51 1089.27 0.23 51.36 0.02 0.00 0.00 2:15 0.4 0.08 0.90 0.07 0.0081 0.0095 8.51 0.00 0.00 0.00 0.00 0.00 8.51 1091.44 0.23 59.63 0.03 0.00 0.00 2:30 0.4 0.08 0.89 0.07 0.0081 0.0095 8.51 0.00 0.00 0.00 0.00 0.00 8.51 1093.61 0.23 67.91 0.03 0.00 0.00 2:45 0.5 0.10 0.88 0.09 0.0101 0.0118 10.63 0.00 0.00 0.00 0.00 0.00 10.63 1095.77 0.23 78.32 0.04 0.00 0.00 3:00 0.5 0.10 0.87 0.09 0.0101 0.0118 10.63 0.00 0.00 0.00 0.00 0.00 10.63 1098.49 0.23 88.72 0.04 0.00 0.00 3:15 0.5 0.10 0.85 0.09 0.0101 0.0118 10.63 0.00 0.00 0.00 0.00 0.00 10.63 1101.22 0.23 99.12 0.05 0.00 0.00 3:30 0.5 0.10 0.84 0.09 0.0101 0.0118 10.63 0.00 0.00 0.00 0.00 0.00 10.63 1103.94 0.23 109.52 0.05 0.00 0.00 3:45 0.5 0.10 0.83 0.09 0.0101 0.0118 10.63 0.00 0.00 0.00 0.00 0.00 10.63 1106.66 0.23 119.93 0.06 0.00 0.00 4:00 0.6 0.12 0.82 0.11 0.0121 0.0142 12.76 0.00 0.00 0.00 0.00 0.00 12.76 1109.38 0.23 132.45 0.06 0.00 0.00 4:15 0.6 0.12 0.81 0.11 0.0121 0.0142 12.76 0.00 0.00 0.00 0.00 0.00 12.76 1112.66 0.23 144.98 0.07 0.00 0.00 4:30 0.7 0.14 0.80 0.13 0.0141 0.0165 14.89 0.00 0.00 0.00 0.00 0.00 14.89 1115.94 0.23 159.63 0.08 0.00 0.00 4:45 0.7 0.14 0.79 0.13 0.0141 0.0165 14.89 0.00 0.00 0.00 0.00 0.00 14.89 1119.77 0.23 174.29 0.08 0.00 0.00 5:00 0.8 0.16 0.78 0.15 0.0162 0.0189 17.01 0.00 0.00 0.00 0.00 0.00 17.01 1123.61 0.23 191.06 0.09 0.00 0.00 5:15 0.6 0.12 0.77 0.11 0.0121 0.0142 12.76 0.00 0.00 0.00 0.00 0.00 12.76 1128.00 0.23 203.59 0.10 0.00 0.00 5:30 0.7 0.14 0.76 0.13 0.0141 0.0165 14.89 0.00 0.00 0.00 0.00 0.00 14.89 1131.28 0.24 218.24 0.11 0.00 0.00 5:45 0.8 0.16 0.75 0.15 0.0162 0.0189 17.01 0.00 0.00 0.00 0.00 0.00 17.01 1135.11 0.24 235.01 0.11 0.00 0.00 6:00 0.8 0.16 0.74 0.15 0.0162 0.0189 17.01 0.00 0.00 0.00 0.00 0.00 17.01 1139.50 0.24 251.79 0.12 0.00 0.00 6:15 0.9 0.18 0.73 0.16 0.0182 0.0213 19.14 0.00 0.00 0.00 0.00 0.00 19.14 1143.89 0.24 270.69 0.13 0.00 0.00 6:30 0.9 0.18 0.72 0.16 0.0182 0.0213 19.14 0.00 0.00 0.00 0.00 0.00 19.14 1148.83 0.24 289.58 0.14 0.00 0.00 6:45 1 0.20 0.71 0.18 0.0202 0.0236 21.26 0.00 0.00 0.00 0.00 0.00 21.26 1153.78 0.24 310.61 0.15 0.00 0.00 7:00 1 0.20 0.70 0.18 0.0202 0.0236 21.26 0.00 0.00 0.00 0.00 0.00 21.26 1159.28 0.24 331.63 0.16 0.00 0.00 7:15 1 0.20 0.69 0.18 0.0202 0.0236 21.26 0.00 0.00 0.00 0.00 0.00 21.26 1164.78 0.24 352.65 0.17 0.00 0.00 7:30 1.1 0.22 0.68 0.20 0.0222 0.0260 23.39 0.00 0.00 0.00 0.00 0.00 23.39 1170.28 0.24 375.80 0.18 0.00 0.00 7:45 1.2 0.24 0.67 0.22 0.0242 0.0284 25.52 0.00 0.00 0.00 0.00 0.00 25.52 1176.34 0.25 401.07 0.19 0.00 0.00 8:00 1.3 0.26 0.66 0.24 0.0263 0.0307 27.64 0.00 0.00 0.00 0.00 0.00 27.64 1182.96 0.25 428.47 0.21 0.00 0.00 8:15 1.5 0.30 0.66 0.27 0.0303 0.0354 31.90 0.00 0.00 0.00 0.00 0.00 31.90 1190.12 0.25 460.12 0.22 0.00 0.00 8:30 1.5 0.30 0.65 0.27 0.0303 0.0354 31.90 0.00 0.00 0.00 0.00 0.00 31.90 1198.41 0.25 491.77 0.24 0.00 0.00 8:45 1.6 0.32 0.64 0.29 0.0323 0.0378 34.02 0.00 0.00 0.00 0.00 0.00 34.02 1206.69 0.25 525.54 0.26 0.00 0.00 9:00 1.7 0.34 0.63 0.31 0.0343 0.0402 36.15 0.00 0.00 0.00 0.00 0.00 36.15 1215.53 0.25 561.43 0.27 0.00 0.00 9:15 1.9 0.38 0.62 0.35 0.0384 0.0449 40.40 0.00 0.00 0.00 0.00 0.00 40.40 1224.92 0.26 601.58 0.29 0.00 0.00 9:30 2 0.40 0.61 0.36 0.0404 0.0473 42.53 0.00 0.00 0.00 0.00 0.00 42.53 1235.43 0.26 643.85 0.31 0.00 0.00 9:45 2.1 0.42 0.60 0.38 0.0424 0.0496 44.66 0.00 0.00 0.00 0.00 0.00 44.66 1246.49 0.26 688.25 0.33 0.00 0.00 10:00 2.2 0.44 0.59 0.40 0.0444 0.0520 46.78 0.00 0.00 0.00 0.00 0.00 46.78 1258.11 0.26 734.77 0.36 0.00 0.00 10:15 1.5 0.30 0.58 0.27 0.0303 0.0354 31.90 0.00 0.00 0.00 0.00 0.00 31.90 1270.28 0.26 766.40 0.37 0.00 0.00 10:30 1.5 0.30 0.58 0.27 0.0303 0.0354 31.90 0.00 0.00 0.00 0.00 0.00 31.90 1278.56 0.27 798.03 0.39 0.00 0.00 10:45 2 0.40 0.57 0.36 0.0404 0.0473 42.53 0.00 0.00 0.00 0.00 0.00 42.53 1286.83 0.27 840.29 0.41 0.00 0.00 11:00 2 0.40 0.56 0.36 0.0404 0.0473 42.53 0.00 0.00 0.00 0.00 0.00 42.53 1297.89 0.27 882.55 0.43 0.00 0.00 11:15 1.9 0.38 0.55 0.35 0.0384 0.0449 40.40 0.00 0.00 0.00 0.00 0.00 40.40 1308.95 0.27 922.68 0.45 0.00 0.00 11:30 1.9 0.38 0.54 0.35 0.0384 0.0449 40.40 0.00 0.00 0.00 0.00 0.00 40.40 1319.45 0.27 962.81 0.47 0.00 0.00 11:45 1.7 0.34 0.53 0.31 0.0343 0.0402 36.15 0.00 0.00 0.00 0.00 0.00 36.15 1329.95 0.28 998.68 0.48 0.00 0.00 12:00 1.8 0.36 0.53 0.33 0.0364 0.0425 38.28 0.00 0.00 0.00 0.00 0.00 38.28 1339.34 0.28 1036.68 0.50 0.00 0.00 12:15 2.5 0.51 0.52 0.45 0.0505 0.0591 53.16 0.00 0.00 0.00 0.00 0.00 53.16 1349.28 0.28 1089.56 0.53 0.00 0.00 12:30 2.6 0.53 0.51 0.47 0.0525 0.0614 55.29 0.00 0.00 0.00 0.00 0.00 55.29 1363.12 0.28 1144.56 0.56 0.00 0.00 12:45 2.8 0.57 0.50 N/A 0.0622 0.0728 65.51 0.00 0.00 0.00 0.00 0.00 65.51 1377.52 0.29 1209.79 0.59 0.00 0.00 378

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13:00 2.9 0.59 0.50 N/A 0.0900 0.1053 94.77 0.00 0.00 0.00 0.00 0.00 94.77 1394.58 0.29 1304.27 0.63 0.00 0.00 13:15 3.4 0.69 0.49 N/A 0.1985 0.2322 208.99 0.00 0.00 0.00 0.00 0.00 208.99 1419.31 0.30 1512.97 0.73 0.00 0.00 13:30 3.4 0.69 0.48 N/A 0.2059 0.2409 216.79 0.00 0.00 0.00 0.00 0.00 216.79 1473.92 0.31 1729.45 0.84 0.00 0.00 13:45 2.3 0.46 0.47 0.42 0.0465 0.0543 48.91 0.00 0.00 0.00 0.00 0.00 48.91 1530.57 0.32 1778.04 0.86 0.00 0.00 14:00 2.3 0.46 0.47 0.42 0.0465 0.0543 48.91 0.00 0.00 0.00 0.00 0.00 48.91 1543.29 0.32 1826.63 0.89 0.00 0.00 14:15 2.7 0.55 0.46 N/A 0.0862 0.1008 90.72 0.00 0.00 0.00 0.00 0.00 90.72 1556.00 0.32 1917.03 0.93 0.00 0.00 14:30 2.6 0.53 0.45 N/A 0.0730 0.0854 76.85 0.00 0.00 0.00 0.00 0.00 76.85 1579.66 0.33 1993.55 0.97 0.00 0.00 14:45 2.6 0.53 0.45 N/A 0.0799 0.0935 84.13 0.00 0.00 0.00 0.00 0.00 84.13 1599.68 0.33 2077.34 1.01 0.00 0.00 15:00 2.5 0.51 0.44 N/A 0.0665 0.0778 70.03 0.00 0.00 0.00 0.00 0.00 70.03 1621.61 0.34 2147.03 1.04 0.00 0.00 15:15 2.4 0.48 0.43 N/A 0.0530 0.0620 55.83 0.00 0.00 0.00 0.00 0.00 55.83 1639.85 0.34 2202.52 1.07 0.00 0.00 15:30 2.3 0.46 0.43 0.42 0.0465 0.0543 48.91 0.00 0.00 0.00 0.00 0.00 48.91 1654.37 0.34 2251.09 1.09 0.00 0.00 15:45 1.9 0.38 0.42 0.35 0.0384 0.0449 40.40 0.00 0.00 0.00 0.00 0.00 40.40 1667.08 0.35 2291.14 1.11 0.00 0.00 16:00 1.9 0.38 0.41 0.35 0.0384 0.0449 40.40 0.00 0.00 0.00 0.00 0.00 40.40 1677.56 0.35 2331.20 1.13 0.00 0.00 16:15 0.4 0.08 0.41 0.07 0.0081 0.0095 8.51 0.00 0.00 0.00 0.00 0.00 8.51 1688.04 0.35 2339.35 1.14 0.00 0.00 16:30 0.4 0.08 0.40 0.07 0.0081 0.0095 8.51 0.00 0.00 0.00 0.00 0.00 8.51 1690.18 0.35 2347.50 1.14 0.00 0.00 16:45 0.3 0.06 0.39 0.05 0.0061 0.0071 6.38 0.00 0.00 0.00 0.00 0.00 6.38 1692.31 0.35 2353.53 1.14 0.00 0.00 17:00 0.3 0.06 0.39 0.05 0.0061 0.0071 6.38 0.00 0.00 0.00 0.00 0.00 6.38 1693.89 0.35 2359.56 1.15 0.00 0.00 17:15 0.5 0.10 0.38 0.09 0.0101 0.0118 10.63 0.00 0.00 0.00 0.00 0.00 10.63 1695.46 0.35 2369.84 1.15 0.00 0.00 17:30 0.5 0.10 0.38 0.09 0.0101 0.0118 10.63 0.00 0.00 0.00 0.00 0.00 10.63 1698.15 0.35 2380.11 1.16 0.00 0.00 17:45 0.5 0.10 0.37 0.09 0.0101 0.0118 10.63 0.00 0.00 0.00 0.00 0.00 10.63 1700.84 0.35 2390.39 1.16 0.00 0.00 18:00 0.4 0.08 0.37 0.07 0.0081 0.0095 8.51 0.00 0.00 0.00 0.00 0.00 8.51 1703.53 0.35 2398.54 1.16 0.00 0.00 18:15 0.4 0.08 0.36 0.07 0.0081 0.0095 8.51 0.00 0.00 0.00 0.00 0.00 8.51 1705.67 0.36 2406.69 1.17 0.00 0.00 18:30 0.4 0.08 0.35 0.07 0.0081 0.0095 8.51 0.00 0.00 0.00 0.00 0.00 8.51 1707.80 0.36 2414.84 1.17 0.00 0.00 18:45 0.3 0.06 0.35 0.05 0.0061 0.0071 6.38 0.00 0.00 0.00 0.00 0.00 6.38 1709.93 0.36 2420.87 1.18 0.00 0.00 19:00 0.2 0.04 0.34 0.04 0.0040 0.0047 4.25 0.00 0.00 0.00 0.00 0.00 4.25 1711.51 0.36 2424.76 1.18 0.00 0.00 19:15 0.3 0.06 0.34 0.05 0.0061 0.0071 6.38 0.00 0.00 0.00 0.00 0.00 6.38 1712.53 0.36 2430.79 1.18 0.00 0.00 19:30 0.4 0.08 0.34 0.07 0.0081 0.0095 8.51 0.00 0.00 0.00 0.00 0.00 8.51 1714.10 0.36 2438.93 1.18 0.00 0.00 19:45 0.3 0.06 0.33 0.05 0.0061 0.0071 6.38 0.00 0.00 0.00 0.00 0.00 6.38 1716.24 0.36 2444.96 1.19 0.00 0.00 20:00 0.2 0.04 0.33 0.04 0.0040 0.0047 4.25 0.00 0.00 0.00 0.00 0.00 4.25 1717.81 0.36 2448.85 1.19 0.00 0.00 20:15 0.3 0.06 0.32 0.05 0.0061 0.0071 6.38 0.00 0.00 0.00 0.00 0.00 6.38 1718.83 0.36 2454.87 1.19 0.00 0.00 20:30 0.3 0.06 0.32 0.05 0.0061 0.0071 6.38 0.00 0.00 0.00 0.00 0.00 6.38 1720.41 0.36 2460.89 1.19 0.00 0.00 20:45 0.3 0.06 0.31 0.05 0.0061 0.0071 6.38 0.00 0.00 0.00 0.00 0.00 6.38 1721.98 0.36 2466.91 1.20 0.00 0.00 21:00 0.2 0.04 0.31 0.04 0.0040 0.0047 4.25 0.00 0.00 0.00 0.00 0.00 4.25 1723.56 0.36 2470.81 1.20 0.00 0.00 21:15 0.3 0.06 0.31 0.05 0.0061 0.0071 6.38 0.00 0.00 0.00 0.00 0.00 6.38 1724.58 0.36 2476.83 1.20 0.00 0.00 21:30 0.2 0.04 0.30 0.04 0.0040 0.0047 4.25 0.00 0.00 0.00 0.00 0.00 4.25 1726.15 0.36 2480.72 1.20 0.00 0.00 21:45 0.3 0.06 0.30 0.05 0.0061 0.0071 6.38 0.00 0.00 0.00 0.00 0.00 6.38 1727.17 0.36 2486.74 1.21 0.00 0.00 22:00 0.2 0.04 0.30 0.04 0.0040 0.0047 4.25 0.00 0.00 0.00 0.00 0.00 4.25 1728.75 0.36 2490.63 1.21 0.00 0.00 22:15 0.3 0.06 0.29 0.05 0.0061 0.0071 6.38 0.00 0.00 0.00 0.00 0.00 6.38 1729.77 0.36 2496.65 1.21 0.00 0.00 22:30 0.2 0.04 0.29 0.04 0.0040 0.0047 4.25 0.00 0.00 0.00 0.00 0.00 4.25 1731.34 0.36 2500.55 1.21 0.00 0.00 22:45 0.2 0.04 0.29 0.04 0.0040 0.0047 4.25 0.00 0.00 0.00 0.00 0.00 4.25 1732.36 0.36 2504.44 1.22 0.00 0.00 23:00 0.2 0.04 0.29 0.04 0.0040 0.0047 4.25 0.00 0.00 0.00 0.00 0.00 4.25 1733.38 0.36 2508.33 1.22 0.00 0.00 23:15 0.2 0.04 0.28 0.04 0.0040 0.0047 4.25 0.00 0.00 0.00 0.00 0.00 4.25 1734.40 0.36 2512.22 1.22 0.00 0.00 23:30 0.2 0.04 0.28 0.04 0.0040 0.0047 4.25 0.00 0.00 0.00 0.00 0.00 4.25 1735.41 0.36 2516.11 1.22 0.00 0.00 23:45 0.2 0.04 0.28 0.04 0.0040 0.0047 4.25 0.00 0.00 0.00 0.00 0.00 4.25 1736.43 0.36 2520.00 1.22 0.00 0.00 24:00 0.2 0.04 0.28 0.04 0.0040 0.0047 4.25 0.00 0.00 0.00 0.00 0.00 4.25 1737.45 0.36 2523.89 1.23 0.00 0.00 0 0.00 0.28 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1738.47 0.36 2523.53 1.23 0.00 0.00 Total volume (cf)2552.09 Total Overflow (cf)0.00
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HYDROLOGY CALCULATIONS - program updated 4-14-22 LC
Using the RCFC&WCD Short Cut Unit Hydrograph Method
Area Designations Area 1 VERSION 2 Area=1.09ac+0.09ac typ street frontage=1.18ac 5/7/2024 LOT 3
Drainage Area (ac.)1.1800 JOB NUMBER 22106
Unit time (minutes)5 5 5 15
100 Year Storm Duration (hrs)1 3 6 24
Total Precipitation (Plates D-4.4,E-5.2, 5.4, 5.6)(in.)2.41 3.10 3.79 5.05 from NOAA interactive website Soils Group A
AMC index II Runoff Number (plate E-6.1)32
Plate E-6.2 Pervious Area Loss Rate (Fp)(in/hr)0.74 (AMC II) Percentage of Impervious Cover (Ai)(%) (plate E-6.3)26.6 20% per the RCFC Hydrology Manual 1AC LOT-PLATE D 5.6 AND 0.09AC TYPICAL STREET FRONTAGE Weighted Average Loss Rate (F=Fp(1-.9Ai))(in./hr.)0.56 (used for 1, 3, and 6 hour storm, the 24 hour storm uses variable maximum loss rate per plate E-1.1 (3 of 6)) Low Loss Rate Percent (%) 90
Retention Basin Percolation Rate (in/hr)0.01 (also used for drywell percolation rate) Percolation is taken incrementally.

Drywell design factors Upper sec. (ft.)=0.001 Lower sec. (ft.)=0.001 Ring diam. (ft.) =0.001 Drywell lower max. (cf)=0.00 Upper max.(cf)=0.00 Gravel bed width around drywell=0.001 Drywell total(cf)=0.00 Ret. Basin design (area, depth) Top =3234 s.f.Bot. =1078 s.f.Max. Depth (d)=4 Max. storage=8238.87 (d/3)*(bottom+top+(bottom*top)^0.50) Formulas vol=(h/3)*(bottom+top+(bottom*top)^0.50) area=bottom+(h/d)*(top-bottom)h=(vol*3)/(bottom+top+(bottom*top)^0.5)(values must be non-zero or error occurs) Outside input from:N/A 3.25
1 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 3.7 1.0700 0.5628 N/A 0.5072 0.6035 181.04 0.00 0.00 0.00 0.00 0.00 181.04 1078.00 0.07 180.97 0.09 0.00 0.00 0:10 4.8 1.3882 0.5628 N/A 0.8253 0.9820 294.60 0.00 0.00 0.00 0.00 0.00 294.60 1125.36 0.08 475.49 0.23 0.00 0.00 0:15 5.1 1.4749 0.5628 N/A 0.9121 1.0852 325.57 0.00 0.00 0.00 0.00 0.00 325.57 1202.43 0.08 800.97 0.39 0.00 0.00 0:20 4.9 1.4171 0.5628 N/A 0.8542 1.0164 304.92 0.00 0.00 0.00 0.00 0.00 304.92 1287.60 0.09 1105.80 0.54 0.00 0.00 0:25 6.6 1.9087 0.5628 N/A 1.3459 1.6014 480.41 0.00 0.00 0.00 0.00 0.00 480.41 1367.37 0.09 1586.11 0.77 0.00 0.00 0:30 7.3 2.1112 0.5628 N/A 1.5483 1.8422 552.67 0.00 0.00 0.00 0.00 0.00 552.67 1493.06 0.10 2138.68 1.04 0.00 0.00 0:35 8.4 2.4293 0.5628 N/A 1.8664 2.2207 666.22 0.00 0.00 0.00 0.00 0.00 666.22 1637.66 0.11 2804.79 1.36 0.00 0.00 0:40 9 2.6028 0.5628 N/A 2.0400 2.4272 728.16 0.00 0.00 0.00 0.00 0.00 728.16 1811.98 0.13 3532.83 1.72 0.00 0.00 0:45 12.3 3.5572 0.5628 N/A 2.9943 3.5627 1068.82 0.00 0.00 0.00 0.00 0.00 1068.82 2002.49 0.14 4601.51 2.23 0.00 0.00 0:50 17.6 5.0899 0.5628 N/A 4.5271 5.3865 1615.94 0.00 0.00 0.00 0.00 0.00 1615.94 2282.15 0.16 6217.29 3.02 0.00 0.00 0:55 16.1 4.6561 0.5628 N/A 4.0933 4.8703 1461.09 0.00 0.00 0.00 0.00 0.00 1461.09 2704.98 0.19 7678.20 3.73 0.00 0.00 1:00 4.2 1.2146 0.5628 N/A 0.6518 0.7755 232.66 0.00 0.00 0.00 0.00 0.00 232.66 3087.28 0.21 7910.64 3.84 0.00 0.00 MAX DEPTH 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3148.11 0.22 7910.43 3.84 0.00 0.00 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3148.05 0.22 7910.21 3.84 0.00 0.00 1:15 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3147.99 0.22 7909.99 3.84 0.00 0.00 Total volume (cf)7912.11 Total Overflow (cf)0.00
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3 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 1.3 0.48 0.56 0.44 0.0484 0.0575 17.26 0.00 0.00 0.00 0.00 0.00 17.26 1078.00 0.07 17.19 0.01 0.00 0.00 0:10 1.3 0.48 0.56 0.44 0.0484 0.0575 17.26 0.00 0.00 0.00 0.00 0.00 17.26 1082.50 0.08 34.37 0.02 0.00 0.00 0:15 1.1 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1087.00 0.08 48.91 0.02 0.00 0.00 0:20 1.5 0.56 0.56 0.50 0.0558 0.0664 19.92 0.00 0.00 0.00 0.00 0.00 19.92 1090.80 0.08 68.75 0.03 0.00 0.00 0:25 1.5 0.56 0.56 0.50 0.0558 0.0664 19.92 0.00 0.00 0.00 0.00 0.00 19.92 1095.99 0.08 88.59 0.04 0.00 0.00 0:30 1.8 0.67 0.56 N/A 0.1068 0.1270 38.11 0.00 0.00 0.00 0.00 0.00 38.11 1101.18 0.08 126.62 0.06 0.00 0.00 0:35 1.5 0.56 0.56 0.50 0.0558 0.0664 19.92 0.00 0.00 0.00 0.00 0.00 19.92 1111.13 0.08 146.46 0.07 0.00 0.00 0:40 1.8 0.67 0.56 N/A 0.1068 0.1270 38.11 0.00 0.00 0.00 0.00 0.00 38.11 1116.33 0.08 184.49 0.09 0.00 0.00 0:45 1.8 0.67 0.56 N/A 0.1068 0.1270 38.11 0.00 0.00 0.00 0.00 0.00 38.11 1126.28 0.08 222.52 0.11 0.00 0.00 0:50 1.5 0.56 0.56 0.50 0.0558 0.0664 19.92 0.00 0.00 0.00 0.00 0.00 19.92 1136.23 0.08 242.36 0.12 0.00 0.00 0:55 1.6 0.60 0.56 0.54 0.0595 0.0708 21.25 0.00 0.00 0.00 0.00 0.00 21.25 1141.42 0.08 263.52 0.13 0.00 0.00 1:00 1.8 0.67 0.56 N/A 0.1068 0.1270 38.11 0.00 0.00 0.00 0.00 0.00 38.11 1146.96 0.08 301.55 0.15 0.00 0.00 1:05 2.2 0.82 0.56 N/A 0.2556 0.3041 91.22 0.00 0.00 0.00 0.00 0.00 91.22 1156.91 0.08 392.69 0.19 0.00 0.00 1:10 2.2 0.82 0.56 N/A 0.2556 0.3041 91.22 0.00 0.00 0.00 0.00 0.00 91.22 1180.76 0.08 483.83 0.23 0.00 0.00 1:15 2.2 0.82 0.56 N/A 0.2556 0.3041 91.22 0.00 0.00 0.00 0.00 0.00 91.22 1204.61 0.08 574.97 0.28 0.00 0.00 1:20 2 0.74 0.56 N/A 0.1812 0.2155 64.66 0.00 0.00 0.00 0.00 0.00 64.66 1228.46 0.09 639.54 0.31 0.00 0.00 1:25 2.6 0.97 0.56 N/A 0.4044 0.4811 144.33 0.00 0.00 0.00 0.00 0.00 144.33 1245.36 0.09 783.79 0.38 0.00 0.00 1:30 2.7 1.00 0.56 N/A 0.4416 0.5254 157.61 0.00 0.00 0.00 0.00 0.00 157.61 1283.11 0.09 941.32 0.46 0.00 0.00 1:35 2.4 0.89 0.56 N/A 0.3300 0.3926 117.78 0.00 0.00 0.00 0.00 0.00 117.78 1324.33 0.09 1059.00 0.51 0.00 0.00 1:40 2.7 1.00 0.56 N/A 0.4416 0.5254 157.61 0.00 0.00 0.00 0.00 0.00 157.61 1355.13 0.09 1216.52 0.59 0.00 0.00 1:45 3.3 1.23 0.56 N/A 0.6648 0.7909 237.28 0.00 0.00 0.00 0.00 0.00 237.28 1396.35 0.10 1453.71 0.71 0.00 0.00 1:50 3.1 1.15 0.56 N/A 0.5904 0.7024 210.73 0.00 0.00 0.00 0.00 0.00 210.73 1458.42 0.10 1664.34 0.81 0.00 0.00 1:55 2.9 1.08 0.56 N/A 0.5160 0.6139 184.17 0.00 0.00 0.00 0.00 0.00 184.17 1513.53 0.11 1848.40 0.90 0.00 0.00 2:00 3 1.12 0.56 N/A 0.5532 0.6582 197.45 0.00 0.00 0.00 0.00 0.00 197.45 1561.70 0.11 2045.74 0.99 0.00 0.00 2:05 3.1 1.15 0.56 N/A 0.5904 0.7024 210.73 0.00 0.00 0.00 0.00 0.00 210.73 1613.34 0.11 2256.36 1.10 0.00 0.00 2:10 4.2 1.56 0.56 N/A 0.9996 1.1893 356.79 0.00 0.00 0.00 0.00 0.00 356.79 1668.46 0.12 2613.03 1.27 0.00 0.00 2:15 5 1.86 0.56 N/A 1.2972 1.5434 463.02 0.00 0.00 0.00 0.00 0.00 463.02 1761.80 0.12 3075.93 1.49 0.00 0.00 2:20 3.5 1.30 0.56 N/A 0.7392 0.8795 263.84 0.00 0.00 0.00 0.00 0.00 263.84 1882.93 0.13 3339.64 1.62 0.00 0.00 2:25 6.8 2.53 0.56 N/A 1.9668 2.3401 702.03 0.00 0.00 0.00 0.00 0.00 702.03 1951.94 0.14 4041.54 1.96 0.00 0.00 2:30 7.3 2.72 0.56 N/A 2.1528 2.5614 768.43 0.00 0.00 0.00 0.00 0.00 768.43 2135.62 0.15 4809.82 2.34 0.00 0.00 2:35 8.2 3.05 0.56 N/A 2.4876 2.9598 887.93 0.00 0.00 0.00 0.00 0.00 887.93 2336.66 0.16 5697.59 2.77 0.00 0.00 2:40 5.9 2.19 0.56 N/A 1.6320 1.9418 582.53 0.00 0.00 0.00 0.00 0.00 582.53 2568.98 0.18 6279.94 3.05 0.00 0.00 2:45 2 0.74 0.56 N/A 0.1812 0.2155 64.66 0.00 0.00 0.00 0.00 0.00 64.66 2721.37 0.19 6344.41 3.08 0.00 0.00 2:50 1.8 0.67 0.56 N/A 0.1068 0.1270 38.11 0.00 0.00 0.00 0.00 0.00 38.11 2738.25 0.19 6382.33 3.10 0.00 0.00 2:55 1.8 0.67 0.56 N/A 0.1068 0.1270 38.11 0.00 0.00 0.00 0.00 0.00 38.11 2748.17 0.19 6420.24 3.12 0.00 0.00 3:00 0.6 0.22 0.56 0.20 0.0223 0.0266 7.97 0.00 0.00 0.00 0.00 0.00 7.97 2758.09 0.19 6428.02 3.12 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2760.13 0.19 6427.83 3.12 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2760.08 0.19 6427.64 3.12 0.00 0.00 3:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2760.02 0.19 6427.44 3.12 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2759.97 0.19 6427.25 3.12 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2759.92 0.19 6427.06 3.12 0.00 0.00 3:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2759.87 0.19 6426.87 3.12 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2759.82 0.19 6426.68 3.12 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2759.77 0.19 6426.49 3.12 0.00 0.00 Total volume (cf)6431.91 Total Overflow (cf)0.00
381

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6 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 0.5 0.23 0.56 0.20 0.0227 0.0271 8.12 0.00 0.00 0.00 0.00 0.00 8.12 1078.00 0.07 8.04 0.00 0.00 0.00 0:10 0.6 0.27 0.56 0.25 0.0273 0.0325 9.74 0.00 0.00 0.00 0.00 0.00 9.74 1080.10 0.08 17.71 0.01 0.00 0.00 0:15 0.6 0.27 0.56 0.25 0.0273 0.0325 9.74 0.00 0.00 0.00 0.00 0.00 9.74 1082.63 0.08 27.37 0.01 0.00 0.00 0:20 0.6 0.27 0.56 0.25 0.0273 0.0325 9.74 0.00 0.00 0.00 0.00 0.00 9.74 1085.16 0.08 37.04 0.02 0.00 0.00 0:25 0.6 0.27 0.56 0.25 0.0273 0.0325 9.74 0.00 0.00 0.00 0.00 0.00 9.74 1087.69 0.08 46.70 0.02 0.00 0.00 0:30 0.7 0.32 0.56 0.29 0.0318 0.0379 11.36 0.00 0.00 0.00 0.00 0.00 11.36 1090.22 0.08 57.99 0.03 0.00 0.00 0:35 0.7 0.32 0.56 0.29 0.0318 0.0379 11.36 0.00 0.00 0.00 0.00 0.00 11.36 1093.18 0.08 69.28 0.03 0.00 0.00 0:40 0.7 0.32 0.56 0.29 0.0318 0.0379 11.36 0.00 0.00 0.00 0.00 0.00 11.36 1096.13 0.08 80.57 0.04 0.00 0.00 0:45 0.7 0.32 0.56 0.29 0.0318 0.0379 11.36 0.00 0.00 0.00 0.00 0.00 11.36 1099.08 0.08 91.85 0.04 0.00 0.00 0:50 0.7 0.32 0.56 0.29 0.0318 0.0379 11.36 0.00 0.00 0.00 0.00 0.00 11.36 1102.04 0.08 103.14 0.05 0.00 0.00 0:55 0.7 0.32 0.56 0.29 0.0318 0.0379 11.36 0.00 0.00 0.00 0.00 0.00 11.36 1104.99 0.08 114.43 0.06 0.00 0.00 1:00 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1107.94 0.08 127.34 0.06 0.00 0.00 1:05 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1111.32 0.08 140.25 0.07 0.00 0.00 1:10 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1114.70 0.08 153.16 0.07 0.00 0.00 1:15 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1118.08 0.08 166.07 0.08 0.00 0.00 1:20 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1121.46 0.08 178.98 0.09 0.00 0.00 1:25 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1124.84 0.08 191.89 0.09 0.00 0.00 1:30 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1128.21 0.08 204.80 0.10 0.00 0.00 1:35 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1131.59 0.08 217.70 0.11 0.00 0.00 1:40 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1134.97 0.08 230.61 0.11 0.00 0.00 1:45 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1138.35 0.08 243.52 0.12 0.00 0.00 1:50 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1141.73 0.08 256.43 0.12 0.00 0.00 1:55 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1145.10 0.08 269.34 0.13 0.00 0.00 2:00 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1148.48 0.08 283.87 0.14 0.00 0.00 2:05 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1152.28 0.08 296.78 0.14 0.00 0.00 2:10 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1155.66 0.08 311.31 0.15 0.00 0.00 2:15 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1159.46 0.08 325.84 0.16 0.00 0.00 2:20 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1163.27 0.08 340.37 0.17 0.00 0.00 2:25 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1167.07 0.08 354.90 0.17 0.00 0.00 2:30 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1170.87 0.08 369.42 0.18 0.00 0.00 2:35 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1174.67 0.08 383.95 0.19 0.00 0.00 2:40 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1178.48 0.08 398.48 0.19 0.00 0.00 2:45 1 0.45 0.56 0.41 0.0455 0.0541 16.23 0.00 0.00 0.00 0.00 0.00 16.23 1182.28 0.08 414.63 0.20 0.00 0.00 2:50 1 0.45 0.56 0.41 0.0455 0.0541 16.23 0.00 0.00 0.00 0.00 0.00 16.23 1186.50 0.08 430.79 0.21 0.00 0.00 2:55 1 0.45 0.56 0.41 0.0455 0.0541 16.23 0.00 0.00 0.00 0.00 0.00 16.23 1190.73 0.08 446.94 0.22 0.00 0.00 3:00 1 0.45 0.56 0.41 0.0455 0.0541 16.23 0.00 0.00 0.00 0.00 0.00 16.23 1194.96 0.08 463.09 0.22 0.00 0.00 3:05 1 0.45 0.56 0.41 0.0455 0.0541 16.23 0.00 0.00 0.00 0.00 0.00 16.23 1199.18 0.08 479.24 0.23 0.00 0.00 3:10 1.1 0.50 0.56 0.45 0.0500 0.0595 17.86 0.00 0.00 0.00 0.00 0.00 17.86 1203.41 0.08 497.01 0.24 0.00 0.00 3:15 1.1 0.50 0.56 0.45 0.0500 0.0595 17.86 0.00 0.00 0.00 0.00 0.00 17.86 1208.06 0.08 514.79 0.25 0.00 0.00 3:20 1.1 0.50 0.56 0.45 0.0500 0.0595 17.86 0.00 0.00 0.00 0.00 0.00 17.86 1212.71 0.08 532.56 0.26 0.00 0.00 3:25 1.2 0.55 0.56 0.49 0.0546 0.0649 19.48 0.00 0.00 0.00 0.00 0.00 19.48 1217.36 0.08 551.96 0.27 0.00 0.00 3:30 1.3 0.59 0.56 0.53 0.0591 0.0703 21.10 0.00 0.00 0.00 0.00 0.00 21.10 1222.44 0.08 572.98 0.28 0.00 0.00 3:35 1.4 0.64 0.56 N/A 0.0739 0.0879 26.37 0.00 0.00 0.00 0.00 0.00 26.37 1227.94 0.09 599.26 0.29 0.00 0.00 3:40 1.4 0.64 0.56 N/A 0.0739 0.0879 26.37 0.00 0.00 0.00 0.00 0.00 26.37 1234.82 0.09 625.55 0.30 0.00 0.00 3:45 1.5 0.68 0.56 N/A 0.1194 0.1420 42.60 0.00 0.00 0.00 0.00 0.00 42.60 1241.70 0.09 668.06 0.32 0.00 0.00 3:50 1.5 0.68 0.56 N/A 0.1194 0.1420 42.60 0.00 0.00 0.00 0.00 0.00 42.60 1252.82 0.09 710.58 0.34 0.00 0.00 3:55 1.6 0.73 0.56 N/A 0.1648 0.1961 58.84 0.00 0.00 0.00 0.00 0.00 58.84 1263.95 0.09 769.33 0.37 0.00 0.00 4:00 1.6 0.73 0.56 N/A 0.1648 0.1961 58.84 0.00 0.00 0.00 0.00 0.00 58.84 1279.32 0.09 828.08 0.40 0.00 0.00 4:05 1.7 0.77 0.56 N/A 0.2103 0.2502 75.07 0.00 0.00 0.00 0.00 0.00 75.07 1294.70 0.09 903.06 0.44 0.00 0.00 4:10 1.8 0.82 0.56 N/A 0.2558 0.3044 91.31 0.00 0.00 0.00 0.00 0.00 91.31 1314.32 0.09 994.28 0.48 0.00 0.00 4:15 1.9 0.86 0.56 N/A 0.3013 0.3585 107.54 0.00 0.00 0.00 0.00 0.00 107.54 1338.19 0.09 1101.73 0.53 0.00 0.00 382

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4:20 2 0.91 0.56 N/A 0.3468 0.4126 123.77 0.00 0.00 0.00 0.00 0.00 123.77 1366.31 0.09 1225.40 0.59 0.00 0.00 4:25 2.1 0.96 0.56 N/A 0.3922 0.4667 140.01 0.00 0.00 0.00 0.00 0.00 140.01 1398.67 0.10 1365.32 0.66 0.00 0.00 4:30 2.1 0.96 0.56 N/A 0.3922 0.4667 140.01 0.00 0.00 0.00 0.00 0.00 140.01 1435.28 0.10 1505.23 0.73 0.00 0.00 4:35 2.2 1.00 0.56 N/A 0.4377 0.5208 156.24 0.00 0.00 0.00 0.00 0.00 156.24 1471.90 0.10 1661.37 0.81 0.00 0.00 4:40 2.3 1.05 0.56 N/A 0.4832 0.5749 172.48 0.00 0.00 0.00 0.00 0.00 172.48 1512.76 0.11 1833.74 0.89 0.00 0.00 4:45 2.4 1.09 0.56 N/A 0.5287 0.6290 188.71 0.00 0.00 0.00 0.00 0.00 188.71 1557.86 0.11 2022.34 0.98 0.00 0.00 4:50 2.4 1.09 0.56 N/A 0.5287 0.6290 188.71 0.00 0.00 0.00 0.00 0.00 188.71 1607.22 0.11 2210.94 1.07 0.00 0.00 4:55 2.5 1.14 0.56 N/A 0.5742 0.6831 204.94 0.00 0.00 0.00 0.00 0.00 204.94 1656.57 0.12 2415.77 1.17 0.00 0.00 5:00 2.6 1.18 0.56 N/A 0.6196 0.7373 221.18 0.00 0.00 0.00 0.00 0.00 221.18 1710.17 0.12 2636.83 1.28 0.00 0.00 5:05 3.1 1.41 0.56 N/A 0.8470 1.0078 302.35 0.00 0.00 0.00 0.00 0.00 302.35 1768.02 0.12 2939.06 1.43 0.00 0.00 5:10 3.6 1.64 0.56 N/A 1.0744 1.2784 383.52 0.00 0.00 0.00 0.00 0.00 383.52 1847.11 0.13 3322.45 1.61 0.00 0.00 5:15 3.9 1.77 0.56 N/A 1.2109 1.4407 432.22 0.00 0.00 0.00 0.00 0.00 432.22 1947.44 0.14 3754.54 1.82 0.00 0.00 5:20 4.2 1.91 0.56 N/A 1.3473 1.6031 480.92 0.00 0.00 0.00 0.00 0.00 480.92 2060.51 0.14 4235.32 2.06 0.00 0.00 5:25 4.7 2.14 0.56 N/A 1.5747 1.8736 562.09 0.00 0.00 0.00 0.00 0.00 562.09 2186.32 0.15 4797.26 2.33 0.00 0.00 5:30 5.6 2.55 0.56 N/A 1.9840 2.3607 708.20 0.00 0.00 0.00 0.00 0.00 708.20 2333.38 0.16 5505.30 2.67 0.00 0.00 5:35 1.9 0.86 0.56 N/A 0.3013 0.3585 107.54 0.00 0.00 0.00 0.00 0.00 107.54 2518.66 0.17 5612.66 2.72 0.00 0.00 5:40 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 2546.76 0.18 5627.10 2.73 0.00 0.00 5:45 0.6 0.27 0.56 0.25 0.0273 0.0325 9.74 0.00 0.00 0.00 0.00 0.00 9.74 2550.54 0.18 5636.66 2.74 0.00 0.00 5:50 0.5 0.23 0.56 0.20 0.0227 0.0271 8.12 0.00 0.00 0.00 0.00 0.00 8.12 2553.04 0.18 5644.60 2.74 0.00 0.00 5:55 0.3 0.14 0.56 0.12 0.0136 0.0162 4.87 0.00 0.00 0.00 0.00 0.00 4.87 2555.12 0.18 5649.29 2.74 0.00 0.00 6:00 0.2 0.09 0.56 0.08 0.0091 0.0108 3.25 0.00 0.00 0.00 0.00 0.00 3.25 2556.34 0.18 5652.36 2.74 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2557.15 0.18 5652.19 2.74 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2557.10 0.18 5652.01 2.74 0.00 0.00 6:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2557.05 0.18 5651.83 2.74 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2557.01 0.18 5651.65 2.74 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2556.96 0.18 5651.48 2.74 0.00 0.00 6:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2556.91 0.18 5651.30 2.74 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2556.87 0.18 5651.12 2.74 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2556.82 0.18 5650.94 2.74 0.00 0.00 6:45 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2556.78 0.18 5650.77 2.74 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2556.73 0.18 5650.59 2.74 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2556.68 0.18 5650.41 2.74 0.00 0.00 7:00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2556.64 0.18 5650.23 2.74 0.00 0.00 Total volume (cf)5659.35 Total Overflow (cf)0.00
383

5 of 6
24 Hour Storm in 15 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:15 0.2 0.04 0.99 0.04 0.0040 0.0048 4.33 0.00 0.00 0.00 0.00 0.00 4.33 1078.00 0.22 4.10 0.00 0.00 0.00 0:30 0.3 0.06 0.98 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1079.07 0.22 10.37 0.01 0.00 0.00 0:45 0.3 0.06 0.97 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1080.71 0.23 16.63 0.01 0.00 0.00 1:00 0.4 0.08 0.95 0.07 0.0081 0.0096 8.65 0.00 0.00 0.00 0.00 0.00 8.65 1082.35 0.23 25.06 0.01 0.00 0.00 1:15 0.3 0.06 0.94 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1084.56 0.23 31.32 0.02 0.00 0.00 1:30 0.3 0.06 0.93 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1086.20 0.23 37.58 0.02 0.00 0.00 1:45 0.3 0.06 0.92 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1087.84 0.23 43.85 0.02 0.00 0.00 2:00 0.4 0.08 0.91 0.07 0.0081 0.0096 8.65 0.00 0.00 0.00 0.00 0.00 8.65 1089.47 0.23 52.27 0.03 0.00 0.00 2:15 0.4 0.08 0.90 0.07 0.0081 0.0096 8.65 0.00 0.00 0.00 0.00 0.00 8.65 1091.68 0.23 60.70 0.03 0.00 0.00 2:30 0.4 0.08 0.89 0.07 0.0081 0.0096 8.65 0.00 0.00 0.00 0.00 0.00 8.65 1093.88 0.23 69.12 0.03 0.00 0.00 2:45 0.5 0.10 0.88 0.09 0.0101 0.0120 10.82 0.00 0.00 0.00 0.00 0.00 10.82 1096.09 0.23 79.71 0.04 0.00 0.00 3:00 0.5 0.10 0.87 0.09 0.0101 0.0120 10.82 0.00 0.00 0.00 0.00 0.00 10.82 1098.86 0.23 90.30 0.04 0.00 0.00 3:15 0.5 0.10 0.85 0.09 0.0101 0.0120 10.82 0.00 0.00 0.00 0.00 0.00 10.82 1101.63 0.23 100.88 0.05 0.00 0.00 3:30 0.5 0.10 0.84 0.09 0.0101 0.0120 10.82 0.00 0.00 0.00 0.00 0.00 10.82 1104.40 0.23 111.47 0.05 0.00 0.00 3:45 0.5 0.10 0.83 0.09 0.0101 0.0120 10.82 0.00 0.00 0.00 0.00 0.00 10.82 1107.17 0.23 122.05 0.06 0.00 0.00 4:00 0.6 0.12 0.82 0.11 0.0121 0.0144 12.98 0.00 0.00 0.00 0.00 0.00 12.98 1109.94 0.23 134.80 0.07 0.00 0.00 4:15 0.6 0.12 0.81 0.11 0.0121 0.0144 12.98 0.00 0.00 0.00 0.00 0.00 12.98 1113.28 0.23 147.55 0.07 0.00 0.00 4:30 0.7 0.14 0.80 0.13 0.0141 0.0168 15.14 0.00 0.00 0.00 0.00 0.00 15.14 1116.61 0.23 162.46 0.08 0.00 0.00 4:45 0.7 0.14 0.79 0.13 0.0141 0.0168 15.14 0.00 0.00 0.00 0.00 0.00 15.14 1120.51 0.23 177.36 0.09 0.00 0.00 5:00 0.8 0.16 0.78 0.15 0.0162 0.0192 17.30 0.00 0.00 0.00 0.00 0.00 17.30 1124.41 0.23 194.43 0.09 0.00 0.00 5:15 0.6 0.12 0.77 0.11 0.0121 0.0144 12.98 0.00 0.00 0.00 0.00 0.00 12.98 1128.88 0.24 207.18 0.10 0.00 0.00 5:30 0.7 0.14 0.76 0.13 0.0141 0.0168 15.14 0.00 0.00 0.00 0.00 0.00 15.14 1132.22 0.24 222.08 0.11 0.00 0.00 5:45 0.8 0.16 0.75 0.15 0.0162 0.0192 17.30 0.00 0.00 0.00 0.00 0.00 17.30 1136.12 0.24 239.15 0.12 0.00 0.00 6:00 0.8 0.16 0.74 0.15 0.0162 0.0192 17.30 0.00 0.00 0.00 0.00 0.00 17.30 1140.58 0.24 256.22 0.12 0.00 0.00 6:15 0.9 0.18 0.73 0.16 0.0182 0.0216 19.47 0.00 0.00 0.00 0.00 0.00 19.47 1145.05 0.24 275.45 0.13 0.00 0.00 6:30 0.9 0.18 0.72 0.16 0.0182 0.0216 19.47 0.00 0.00 0.00 0.00 0.00 19.47 1150.08 0.24 294.68 0.14 0.00 0.00 6:45 1 0.20 0.71 0.18 0.0202 0.0240 21.63 0.00 0.00 0.00 0.00 0.00 21.63 1155.11 0.24 316.07 0.15 0.00 0.00 7:00 1 0.20 0.70 0.18 0.0202 0.0240 21.63 0.00 0.00 0.00 0.00 0.00 21.63 1160.71 0.24 337.46 0.16 0.00 0.00 7:15 1 0.20 0.69 0.18 0.0202 0.0240 21.63 0.00 0.00 0.00 0.00 0.00 21.63 1166.31 0.24 358.85 0.17 0.00 0.00 7:30 1.1 0.22 0.68 0.20 0.0222 0.0264 23.79 0.00 0.00 0.00 0.00 0.00 23.79 1171.91 0.24 382.40 0.19 0.00 0.00 7:45 1.2 0.24 0.67 0.22 0.0242 0.0288 25.96 0.00 0.00 0.00 0.00 0.00 25.96 1178.07 0.25 408.11 0.20 0.00 0.00 8:00 1.3 0.26 0.66 0.24 0.0263 0.0312 28.12 0.00 0.00 0.00 0.00 0.00 28.12 1184.80 0.25 435.98 0.21 0.00 0.00 8:15 1.5 0.30 0.66 0.27 0.0303 0.0361 32.45 0.00 0.00 0.00 0.00 0.00 32.45 1192.09 0.25 468.18 0.23 0.00 0.00 8:30 1.5 0.30 0.65 0.27 0.0303 0.0361 32.45 0.00 0.00 0.00 0.00 0.00 32.45 1200.52 0.25 500.38 0.24 0.00 0.00 8:45 1.6 0.32 0.64 0.29 0.0323 0.0385 34.61 0.00 0.00 0.00 0.00 0.00 34.61 1208.94 0.25 534.73 0.26 0.00 0.00 9:00 1.7 0.34 0.63 0.31 0.0343 0.0409 36.77 0.00 0.00 0.00 0.00 0.00 36.77 1217.93 0.25 571.25 0.28 0.00 0.00 9:15 1.9 0.38 0.62 0.35 0.0384 0.0457 41.10 0.00 0.00 0.00 0.00 0.00 41.10 1227.49 0.26 612.10 0.30 0.00 0.00 9:30 2 0.40 0.61 0.36 0.0404 0.0481 43.26 0.00 0.00 0.00 0.00 0.00 43.26 1238.18 0.26 655.10 0.32 0.00 0.00 9:45 2.1 0.42 0.60 0.38 0.0424 0.0505 45.43 0.00 0.00 0.00 0.00 0.00 45.43 1249.43 0.26 700.27 0.34 0.00 0.00 10:00 2.2 0.44 0.59 0.40 0.0444 0.0529 47.59 0.00 0.00 0.00 0.00 0.00 47.59 1261.25 0.26 747.59 0.36 0.00 0.00 10:15 1.5 0.30 0.58 0.27 0.0303 0.0361 32.45 0.00 0.00 0.00 0.00 0.00 32.45 1273.63 0.27 779.77 0.38 0.00 0.00 10:30 1.5 0.30 0.58 0.27 0.0303 0.0361 32.45 0.00 0.00 0.00 0.00 0.00 32.45 1282.06 0.27 811.95 0.39 0.00 0.00 10:45 2 0.40 0.57 0.36 0.0404 0.0481 43.26 0.00 0.00 0.00 0.00 0.00 43.26 1290.48 0.27 854.95 0.42 0.00 0.00 11:00 2 0.40 0.56 0.36 0.0404 0.0481 43.26 0.00 0.00 0.00 0.00 0.00 43.26 1301.73 0.27 897.94 0.44 0.00 0.00 11:15 1.9 0.38 0.55 0.35 0.0384 0.0457 41.10 0.00 0.00 0.00 0.00 0.00 41.10 1312.98 0.27 938.76 0.46 0.00 0.00 11:30 1.9 0.38 0.54 0.35 0.0384 0.0457 41.10 0.00 0.00 0.00 0.00 0.00 41.10 1323.66 0.28 979.59 0.48 0.00 0.00 11:45 1.7 0.34 0.53 0.31 0.0343 0.0409 36.77 0.00 0.00 0.00 0.00 0.00 36.77 1334.34 0.28 1016.08 0.49 0.00 0.00 12:00 1.8 0.36 0.53 0.33 0.0364 0.0433 38.94 0.00 0.00 0.00 0.00 0.00 38.94 1343.89 0.28 1054.74 0.51 0.00 0.00 12:15 2.5 0.51 0.52 0.45 0.0505 0.0601 54.08 0.00 0.00 0.00 0.00 0.00 54.08 1354.01 0.28 1108.53 0.54 0.00 0.00 12:30 2.6 0.53 0.51 0.47 0.0525 0.0625 56.24 0.00 0.00 0.00 0.00 0.00 56.24 1368.09 0.29 1164.49 0.57 0.00 0.00 12:45 2.8 0.57 0.50 N/A 0.0622 0.0740 66.64 0.00 0.00 0.00 0.00 0.00 66.64 1382.73 0.29 1230.84 0.60 0.00 0.00 384

6 of 6
13:00 2.9 0.59 0.50 N/A 0.0900 0.1071 96.41 0.00 0.00 0.00 0.00 0.00 96.41 1400.09 0.29 1326.96 0.64 0.00 0.00 13:15 3.4 0.69 0.49 N/A 0.1985 0.2362 212.60 0.00 0.00 0.00 0.00 0.00 212.60 1425.25 0.30 1539.26 0.75 0.00 0.00 13:30 3.4 0.69 0.48 N/A 0.2059 0.2450 220.53 0.00 0.00 0.00 0.00 0.00 220.53 1480.80 0.31 1759.48 0.85 0.00 0.00 13:45 2.3 0.46 0.47 0.42 0.0465 0.0553 49.75 0.00 0.00 0.00 0.00 0.00 49.75 1538.43 0.32 1808.91 0.88 0.00 0.00 14:00 2.3 0.46 0.47 0.42 0.0465 0.0553 49.75 0.00 0.00 0.00 0.00 0.00 49.75 1551.37 0.32 1858.34 0.90 0.00 0.00 14:15 2.7 0.55 0.46 N/A 0.0862 0.1025 92.29 0.00 0.00 0.00 0.00 0.00 92.29 1564.30 0.33 1950.30 0.95 0.00 0.00 14:30 2.6 0.53 0.45 N/A 0.0730 0.0869 78.17 0.00 0.00 0.00 0.00 0.00 78.17 1588.37 0.33 2028.14 0.98 0.00 0.00 14:45 2.6 0.53 0.45 N/A 0.0799 0.0951 85.58 0.00 0.00 0.00 0.00 0.00 85.58 1608.74 0.34 2113.38 1.03 0.00 0.00 15:00 2.5 0.51 0.44 N/A 0.0665 0.0792 71.24 0.00 0.00 0.00 0.00 0.00 71.24 1631.04 0.34 2184.28 1.06 0.00 0.00 15:15 2.4 0.48 0.43 N/A 0.0530 0.0631 56.79 0.00 0.00 0.00 0.00 0.00 56.79 1649.60 0.34 2240.73 1.09 0.00 0.00 15:30 2.3 0.46 0.43 0.42 0.0465 0.0553 49.75 0.00 0.00 0.00 0.00 0.00 49.75 1664.37 0.35 2290.14 1.11 0.00 0.00 15:45 1.9 0.38 0.42 0.35 0.0384 0.0457 41.10 0.00 0.00 0.00 0.00 0.00 41.10 1677.30 0.35 2330.89 1.13 0.00 0.00 16:00 1.9 0.38 0.41 0.35 0.0384 0.0457 41.10 0.00 0.00 0.00 0.00 0.00 41.10 1687.96 0.35 2371.64 1.15 0.00 0.00 16:15 0.4 0.08 0.41 0.07 0.0081 0.0096 8.65 0.00 0.00 0.00 0.00 0.00 8.65 1698.63 0.35 2379.94 1.16 0.00 0.00 16:30 0.4 0.08 0.40 0.07 0.0081 0.0096 8.65 0.00 0.00 0.00 0.00 0.00 8.65 1700.80 0.35 2388.23 1.16 0.00 0.00 16:45 0.3 0.06 0.39 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1702.97 0.35 2394.37 1.16 0.00 0.00 17:00 0.3 0.06 0.39 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1704.57 0.36 2400.50 1.17 0.00 0.00 17:15 0.5 0.10 0.38 0.09 0.0101 0.0120 10.82 0.00 0.00 0.00 0.00 0.00 10.82 1706.18 0.36 2410.96 1.17 0.00 0.00 17:30 0.5 0.10 0.38 0.09 0.0101 0.0120 10.82 0.00 0.00 0.00 0.00 0.00 10.82 1708.92 0.36 2421.42 1.18 0.00 0.00 17:45 0.5 0.10 0.37 0.09 0.0101 0.0120 10.82 0.00 0.00 0.00 0.00 0.00 10.82 1711.65 0.36 2431.88 1.18 0.00 0.00 18:00 0.4 0.08 0.37 0.07 0.0081 0.0096 8.65 0.00 0.00 0.00 0.00 0.00 8.65 1714.39 0.36 2440.18 1.18 0.00 0.00 18:15 0.4 0.08 0.36 0.07 0.0081 0.0096 8.65 0.00 0.00 0.00 0.00 0.00 8.65 1716.56 0.36 2448.47 1.19 0.00 0.00 18:30 0.4 0.08 0.35 0.07 0.0081 0.0096 8.65 0.00 0.00 0.00 0.00 0.00 8.65 1718.73 0.36 2456.77 1.19 0.00 0.00 18:45 0.3 0.06 0.35 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1720.90 0.36 2462.90 1.20 0.00 0.00 19:00 0.2 0.04 0.34 0.04 0.0040 0.0048 4.33 0.00 0.00 0.00 0.00 0.00 4.33 1722.51 0.36 2466.86 1.20 0.00 0.00 19:15 0.3 0.06 0.34 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1723.54 0.36 2472.99 1.20 0.00 0.00 19:30 0.4 0.08 0.34 0.07 0.0081 0.0096 8.65 0.00 0.00 0.00 0.00 0.00 8.65 1725.15 0.36 2481.29 1.20 0.00 0.00 19:45 0.3 0.06 0.33 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1727.32 0.36 2487.42 1.21 0.00 0.00 20:00 0.2 0.04 0.33 0.04 0.0040 0.0048 4.33 0.00 0.00 0.00 0.00 0.00 4.33 1728.92 0.36 2491.38 1.21 0.00 0.00 20:15 0.3 0.06 0.32 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1729.96 0.36 2497.51 1.21 0.00 0.00 20:30 0.3 0.06 0.32 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1731.56 0.36 2503.64 1.22 0.00 0.00 20:45 0.3 0.06 0.31 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1733.17 0.36 2509.77 1.22 0.00 0.00 21:00 0.2 0.04 0.31 0.04 0.0040 0.0048 4.33 0.00 0.00 0.00 0.00 0.00 4.33 1734.77 0.36 2513.73 1.22 0.00 0.00 21:15 0.3 0.06 0.31 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1735.81 0.36 2519.86 1.22 0.00 0.00 21:30 0.2 0.04 0.30 0.04 0.0040 0.0048 4.33 0.00 0.00 0.00 0.00 0.00 4.33 1737.41 0.36 2523.83 1.23 0.00 0.00 21:45 0.3 0.06 0.30 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1738.45 0.36 2529.95 1.23 0.00 0.00 22:00 0.2 0.04 0.30 0.04 0.0040 0.0048 4.33 0.00 0.00 0.00 0.00 0.00 4.33 1740.05 0.36 2533.92 1.23 0.00 0.00 22:15 0.3 0.06 0.29 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1741.09 0.36 2540.04 1.23 0.00 0.00 22:30 0.2 0.04 0.29 0.04 0.0040 0.0048 4.33 0.00 0.00 0.00 0.00 0.00 4.33 1742.69 0.36 2544.01 1.24 0.00 0.00 22:45 0.2 0.04 0.29 0.04 0.0040 0.0048 4.33 0.00 0.00 0.00 0.00 0.00 4.33 1743.73 0.36 2547.97 1.24 0.00 0.00 23:00 0.2 0.04 0.29 0.04 0.0040 0.0048 4.33 0.00 0.00 0.00 0.00 0.00 4.33 1744.77 0.36 2551.93 1.24 0.00 0.00 23:15 0.2 0.04 0.28 0.04 0.0040 0.0048 4.33 0.00 0.00 0.00 0.00 0.00 4.33 1745.81 0.36 2555.89 1.24 0.00 0.00 23:30 0.2 0.04 0.28 0.04 0.0040 0.0048 4.33 0.00 0.00 0.00 0.00 0.00 4.33 1746.84 0.36 2559.86 1.24 0.00 0.00 23:45 0.2 0.04 0.28 0.04 0.0040 0.0048 4.33 0.00 0.00 0.00 0.00 0.00 4.33 1747.88 0.36 2563.82 1.24 0.00 0.00 24:00 0.2 0.04 0.28 0.04 0.0040 0.0048 4.33 0.00 0.00 0.00 0.00 0.00 4.33 1748.92 0.36 2567.78 1.25 0.00 0.00 0 0.00 0.28 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1749.95 0.36 2567.42 1.25 0.00 0.00 Total volume (cf)2596.09 Total Overflow (cf)0.00
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HYDROLOGY CALCULATIONS - program updated 4-14-22 LC
Using the RCFC&WCD Short Cut Unit Hydrograph Method
Area Designations Area 1 VERSION 2 Area=1.09ac+0.09ac typ street frontage=1.18ac 5/7/2024 LOT 4
Drainage Area (ac.)1.1800 JOB NUMBER 22106
Unit time (minutes)5 5 5 15
100 Year Storm Duration (hrs)1 3 6 24
Total Precipitation (Plates D-4.4,E-5.2, 5.4, 5.6)(in.)2.41 3.10 3.79 5.05 from NOAA interactive website Soils Group A
AMC index II Runoff Number (plate E-6.1)32
Plate E-6.2 Pervious Area Loss Rate (Fp)(in/hr)0.74 (AMC II) Percentage of Impervious Cover (Ai)(%) (plate E-6.3)26.6 20% per the RCFC Hydrology Manual 1AC LOT-PLATE D 5.6 AND 0.09AC TYPICAL STREET FRONTAGE Weighted Average Loss Rate (F=Fp(1-.9Ai))(in./hr.)0.56 (used for 1, 3, and 6 hour storm, the 24 hour storm uses variable maximum loss rate per plate E-1.1 (3 of 6)) Low Loss Rate Percent (%) 90
Retention Basin Percolation Rate (in/hr)0.01 (also used for drywell percolation rate) Percolation is taken incrementally.

Drywell design factors Upper sec. (ft.)=0.001 Lower sec. (ft.)=0.001 Ring diam. (ft.) =0.001 Drywell lower max. (cf)=0.00 Upper max.(cf)=0.00 Gravel bed width around drywell=0.001 Drywell total(cf)=0.00 Ret. Basin design (area, depth) Top =3234 s.f.Bot. =1078 s.f.Max. Depth (d)=4 Max. storage=8238.87 (d/3)*(bottom+top+(bottom*top)^0.50) Formulas vol=(h/3)*(bottom+top+(bottom*top)^0.50) area=bottom+(h/d)*(top-bottom)h=(vol*3)/(bottom+top+(bottom*top)^0.5)(values must be non-zero or error occurs) Outside input from:N/A 3.25
1 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 3.7 1.0700 0.5628 N/A 0.5072 0.6035 181.04 0.00 0.00 0.00 0.00 0.00 181.04 1078.00 0.07 180.97 0.09 0.00 0.00 0:10 4.8 1.3882 0.5628 N/A 0.8253 0.9820 294.60 0.00 0.00 0.00 0.00 0.00 294.60 1125.36 0.08 475.49 0.23 0.00 0.00 0:15 5.1 1.4749 0.5628 N/A 0.9121 1.0852 325.57 0.00 0.00 0.00 0.00 0.00 325.57 1202.43 0.08 800.97 0.39 0.00 0.00 0:20 4.9 1.4171 0.5628 N/A 0.8542 1.0164 304.92 0.00 0.00 0.00 0.00 0.00 304.92 1287.60 0.09 1105.80 0.54 0.00 0.00 0:25 6.6 1.9087 0.5628 N/A 1.3459 1.6014 480.41 0.00 0.00 0.00 0.00 0.00 480.41 1367.37 0.09 1586.11 0.77 0.00 0.00 0:30 7.3 2.1112 0.5628 N/A 1.5483 1.8422 552.67 0.00 0.00 0.00 0.00 0.00 552.67 1493.06 0.10 2138.68 1.04 0.00 0.00 0:35 8.4 2.4293 0.5628 N/A 1.8664 2.2207 666.22 0.00 0.00 0.00 0.00 0.00 666.22 1637.66 0.11 2804.79 1.36 0.00 0.00 0:40 9 2.6028 0.5628 N/A 2.0400 2.4272 728.16 0.00 0.00 0.00 0.00 0.00 728.16 1811.98 0.13 3532.83 1.72 0.00 0.00 0:45 12.3 3.5572 0.5628 N/A 2.9943 3.5627 1068.82 0.00 0.00 0.00 0.00 0.00 1068.82 2002.49 0.14 4601.51 2.23 0.00 0.00 0:50 17.6 5.0899 0.5628 N/A 4.5271 5.3865 1615.94 0.00 0.00 0.00 0.00 0.00 1615.94 2282.15 0.16 6217.29 3.02 0.00 0.00 0:55 16.1 4.6561 0.5628 N/A 4.0933 4.8703 1461.09 0.00 0.00 0.00 0.00 0.00 1461.09 2704.98 0.19 7678.20 3.73 0.00 0.00 1:00 4.2 1.2146 0.5628 N/A 0.6518 0.7755 232.66 0.00 0.00 0.00 0.00 0.00 232.66 3087.28 0.21 7910.64 3.84 0.00 0.00 MAX DEPTH 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3148.11 0.22 7910.43 3.84 0.00 0.00 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3148.05 0.22 7910.21 3.84 0.00 0.00 1:15 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3147.99 0.22 7909.99 3.84 0.00 0.00 Total volume (cf)7912.11 Total Overflow (cf)0.00
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3 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 1.3 0.48 0.56 0.44 0.0484 0.0575 17.26 0.00 0.00 0.00 0.00 0.00 17.26 1078.00 0.07 17.19 0.01 0.00 0.00 0:10 1.3 0.48 0.56 0.44 0.0484 0.0575 17.26 0.00 0.00 0.00 0.00 0.00 17.26 1082.50 0.08 34.37 0.02 0.00 0.00 0:15 1.1 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1087.00 0.08 48.91 0.02 0.00 0.00 0:20 1.5 0.56 0.56 0.50 0.0558 0.0664 19.92 0.00 0.00 0.00 0.00 0.00 19.92 1090.80 0.08 68.75 0.03 0.00 0.00 0:25 1.5 0.56 0.56 0.50 0.0558 0.0664 19.92 0.00 0.00 0.00 0.00 0.00 19.92 1095.99 0.08 88.59 0.04 0.00 0.00 0:30 1.8 0.67 0.56 N/A 0.1068 0.1270 38.11 0.00 0.00 0.00 0.00 0.00 38.11 1101.18 0.08 126.62 0.06 0.00 0.00 0:35 1.5 0.56 0.56 0.50 0.0558 0.0664 19.92 0.00 0.00 0.00 0.00 0.00 19.92 1111.13 0.08 146.46 0.07 0.00 0.00 0:40 1.8 0.67 0.56 N/A 0.1068 0.1270 38.11 0.00 0.00 0.00 0.00 0.00 38.11 1116.33 0.08 184.49 0.09 0.00 0.00 0:45 1.8 0.67 0.56 N/A 0.1068 0.1270 38.11 0.00 0.00 0.00 0.00 0.00 38.11 1126.28 0.08 222.52 0.11 0.00 0.00 0:50 1.5 0.56 0.56 0.50 0.0558 0.0664 19.92 0.00 0.00 0.00 0.00 0.00 19.92 1136.23 0.08 242.36 0.12 0.00 0.00 0:55 1.6 0.60 0.56 0.54 0.0595 0.0708 21.25 0.00 0.00 0.00 0.00 0.00 21.25 1141.42 0.08 263.52 0.13 0.00 0.00 1:00 1.8 0.67 0.56 N/A 0.1068 0.1270 38.11 0.00 0.00 0.00 0.00 0.00 38.11 1146.96 0.08 301.55 0.15 0.00 0.00 1:05 2.2 0.82 0.56 N/A 0.2556 0.3041 91.22 0.00 0.00 0.00 0.00 0.00 91.22 1156.91 0.08 392.69 0.19 0.00 0.00 1:10 2.2 0.82 0.56 N/A 0.2556 0.3041 91.22 0.00 0.00 0.00 0.00 0.00 91.22 1180.76 0.08 483.83 0.23 0.00 0.00 1:15 2.2 0.82 0.56 N/A 0.2556 0.3041 91.22 0.00 0.00 0.00 0.00 0.00 91.22 1204.61 0.08 574.97 0.28 0.00 0.00 1:20 2 0.74 0.56 N/A 0.1812 0.2155 64.66 0.00 0.00 0.00 0.00 0.00 64.66 1228.46 0.09 639.54 0.31 0.00 0.00 1:25 2.6 0.97 0.56 N/A 0.4044 0.4811 144.33 0.00 0.00 0.00 0.00 0.00 144.33 1245.36 0.09 783.79 0.38 0.00 0.00 1:30 2.7 1.00 0.56 N/A 0.4416 0.5254 157.61 0.00 0.00 0.00 0.00 0.00 157.61 1283.11 0.09 941.32 0.46 0.00 0.00 1:35 2.4 0.89 0.56 N/A 0.3300 0.3926 117.78 0.00 0.00 0.00 0.00 0.00 117.78 1324.33 0.09 1059.00 0.51 0.00 0.00 1:40 2.7 1.00 0.56 N/A 0.4416 0.5254 157.61 0.00 0.00 0.00 0.00 0.00 157.61 1355.13 0.09 1216.52 0.59 0.00 0.00 1:45 3.3 1.23 0.56 N/A 0.6648 0.7909 237.28 0.00 0.00 0.00 0.00 0.00 237.28 1396.35 0.10 1453.71 0.71 0.00 0.00 1:50 3.1 1.15 0.56 N/A 0.5904 0.7024 210.73 0.00 0.00 0.00 0.00 0.00 210.73 1458.42 0.10 1664.34 0.81 0.00 0.00 1:55 2.9 1.08 0.56 N/A 0.5160 0.6139 184.17 0.00 0.00 0.00 0.00 0.00 184.17 1513.53 0.11 1848.40 0.90 0.00 0.00 2:00 3 1.12 0.56 N/A 0.5532 0.6582 197.45 0.00 0.00 0.00 0.00 0.00 197.45 1561.70 0.11 2045.74 0.99 0.00 0.00 2:05 3.1 1.15 0.56 N/A 0.5904 0.7024 210.73 0.00 0.00 0.00 0.00 0.00 210.73 1613.34 0.11 2256.36 1.10 0.00 0.00 2:10 4.2 1.56 0.56 N/A 0.9996 1.1893 356.79 0.00 0.00 0.00 0.00 0.00 356.79 1668.46 0.12 2613.03 1.27 0.00 0.00 2:15 5 1.86 0.56 N/A 1.2972 1.5434 463.02 0.00 0.00 0.00 0.00 0.00 463.02 1761.80 0.12 3075.93 1.49 0.00 0.00 2:20 3.5 1.30 0.56 N/A 0.7392 0.8795 263.84 0.00 0.00 0.00 0.00 0.00 263.84 1882.93 0.13 3339.64 1.62 0.00 0.00 2:25 6.8 2.53 0.56 N/A 1.9668 2.3401 702.03 0.00 0.00 0.00 0.00 0.00 702.03 1951.94 0.14 4041.54 1.96 0.00 0.00 2:30 7.3 2.72 0.56 N/A 2.1528 2.5614 768.43 0.00 0.00 0.00 0.00 0.00 768.43 2135.62 0.15 4809.82 2.34 0.00 0.00 2:35 8.2 3.05 0.56 N/A 2.4876 2.9598 887.93 0.00 0.00 0.00 0.00 0.00 887.93 2336.66 0.16 5697.59 2.77 0.00 0.00 2:40 5.9 2.19 0.56 N/A 1.6320 1.9418 582.53 0.00 0.00 0.00 0.00 0.00 582.53 2568.98 0.18 6279.94 3.05 0.00 0.00 2:45 2 0.74 0.56 N/A 0.1812 0.2155 64.66 0.00 0.00 0.00 0.00 0.00 64.66 2721.37 0.19 6344.41 3.08 0.00 0.00 2:50 1.8 0.67 0.56 N/A 0.1068 0.1270 38.11 0.00 0.00 0.00 0.00 0.00 38.11 2738.25 0.19 6382.33 3.10 0.00 0.00 2:55 1.8 0.67 0.56 N/A 0.1068 0.1270 38.11 0.00 0.00 0.00 0.00 0.00 38.11 2748.17 0.19 6420.24 3.12 0.00 0.00 3:00 0.6 0.22 0.56 0.20 0.0223 0.0266 7.97 0.00 0.00 0.00 0.00 0.00 7.97 2758.09 0.19 6428.02 3.12 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2760.13 0.19 6427.83 3.12 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2760.08 0.19 6427.64 3.12 0.00 0.00 3:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2760.02 0.19 6427.44 3.12 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2759.97 0.19 6427.25 3.12 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2759.92 0.19 6427.06 3.12 0.00 0.00 3:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2759.87 0.19 6426.87 3.12 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2759.82 0.19 6426.68 3.12 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2759.77 0.19 6426.49 3.12 0.00 0.00 Total volume (cf)6431.91 Total Overflow (cf)0.00
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6 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 0.5 0.23 0.56 0.20 0.0227 0.0271 8.12 0.00 0.00 0.00 0.00 0.00 8.12 1078.00 0.07 8.04 0.00 0.00 0.00 0:10 0.6 0.27 0.56 0.25 0.0273 0.0325 9.74 0.00 0.00 0.00 0.00 0.00 9.74 1080.10 0.08 17.71 0.01 0.00 0.00 0:15 0.6 0.27 0.56 0.25 0.0273 0.0325 9.74 0.00 0.00 0.00 0.00 0.00 9.74 1082.63 0.08 27.37 0.01 0.00 0.00 0:20 0.6 0.27 0.56 0.25 0.0273 0.0325 9.74 0.00 0.00 0.00 0.00 0.00 9.74 1085.16 0.08 37.04 0.02 0.00 0.00 0:25 0.6 0.27 0.56 0.25 0.0273 0.0325 9.74 0.00 0.00 0.00 0.00 0.00 9.74 1087.69 0.08 46.70 0.02 0.00 0.00 0:30 0.7 0.32 0.56 0.29 0.0318 0.0379 11.36 0.00 0.00 0.00 0.00 0.00 11.36 1090.22 0.08 57.99 0.03 0.00 0.00 0:35 0.7 0.32 0.56 0.29 0.0318 0.0379 11.36 0.00 0.00 0.00 0.00 0.00 11.36 1093.18 0.08 69.28 0.03 0.00 0.00 0:40 0.7 0.32 0.56 0.29 0.0318 0.0379 11.36 0.00 0.00 0.00 0.00 0.00 11.36 1096.13 0.08 80.57 0.04 0.00 0.00 0:45 0.7 0.32 0.56 0.29 0.0318 0.0379 11.36 0.00 0.00 0.00 0.00 0.00 11.36 1099.08 0.08 91.85 0.04 0.00 0.00 0:50 0.7 0.32 0.56 0.29 0.0318 0.0379 11.36 0.00 0.00 0.00 0.00 0.00 11.36 1102.04 0.08 103.14 0.05 0.00 0.00 0:55 0.7 0.32 0.56 0.29 0.0318 0.0379 11.36 0.00 0.00 0.00 0.00 0.00 11.36 1104.99 0.08 114.43 0.06 0.00 0.00 1:00 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1107.94 0.08 127.34 0.06 0.00 0.00 1:05 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1111.32 0.08 140.25 0.07 0.00 0.00 1:10 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1114.70 0.08 153.16 0.07 0.00 0.00 1:15 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1118.08 0.08 166.07 0.08 0.00 0.00 1:20 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1121.46 0.08 178.98 0.09 0.00 0.00 1:25 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1124.84 0.08 191.89 0.09 0.00 0.00 1:30 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1128.21 0.08 204.80 0.10 0.00 0.00 1:35 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1131.59 0.08 217.70 0.11 0.00 0.00 1:40 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1134.97 0.08 230.61 0.11 0.00 0.00 1:45 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1138.35 0.08 243.52 0.12 0.00 0.00 1:50 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1141.73 0.08 256.43 0.12 0.00 0.00 1:55 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1145.10 0.08 269.34 0.13 0.00 0.00 2:00 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1148.48 0.08 283.87 0.14 0.00 0.00 2:05 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1152.28 0.08 296.78 0.14 0.00 0.00 2:10 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1155.66 0.08 311.31 0.15 0.00 0.00 2:15 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1159.46 0.08 325.84 0.16 0.00 0.00 2:20 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1163.27 0.08 340.37 0.17 0.00 0.00 2:25 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1167.07 0.08 354.90 0.17 0.00 0.00 2:30 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1170.87 0.08 369.42 0.18 0.00 0.00 2:35 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1174.67 0.08 383.95 0.19 0.00 0.00 2:40 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1178.48 0.08 398.48 0.19 0.00 0.00 2:45 1 0.45 0.56 0.41 0.0455 0.0541 16.23 0.00 0.00 0.00 0.00 0.00 16.23 1182.28 0.08 414.63 0.20 0.00 0.00 2:50 1 0.45 0.56 0.41 0.0455 0.0541 16.23 0.00 0.00 0.00 0.00 0.00 16.23 1186.50 0.08 430.79 0.21 0.00 0.00 2:55 1 0.45 0.56 0.41 0.0455 0.0541 16.23 0.00 0.00 0.00 0.00 0.00 16.23 1190.73 0.08 446.94 0.22 0.00 0.00 3:00 1 0.45 0.56 0.41 0.0455 0.0541 16.23 0.00 0.00 0.00 0.00 0.00 16.23 1194.96 0.08 463.09 0.22 0.00 0.00 3:05 1 0.45 0.56 0.41 0.0455 0.0541 16.23 0.00 0.00 0.00 0.00 0.00 16.23 1199.18 0.08 479.24 0.23 0.00 0.00 3:10 1.1 0.50 0.56 0.45 0.0500 0.0595 17.86 0.00 0.00 0.00 0.00 0.00 17.86 1203.41 0.08 497.01 0.24 0.00 0.00 3:15 1.1 0.50 0.56 0.45 0.0500 0.0595 17.86 0.00 0.00 0.00 0.00 0.00 17.86 1208.06 0.08 514.79 0.25 0.00 0.00 3:20 1.1 0.50 0.56 0.45 0.0500 0.0595 17.86 0.00 0.00 0.00 0.00 0.00 17.86 1212.71 0.08 532.56 0.26 0.00 0.00 3:25 1.2 0.55 0.56 0.49 0.0546 0.0649 19.48 0.00 0.00 0.00 0.00 0.00 19.48 1217.36 0.08 551.96 0.27 0.00 0.00 3:30 1.3 0.59 0.56 0.53 0.0591 0.0703 21.10 0.00 0.00 0.00 0.00 0.00 21.10 1222.44 0.08 572.98 0.28 0.00 0.00 3:35 1.4 0.64 0.56 N/A 0.0739 0.0879 26.37 0.00 0.00 0.00 0.00 0.00 26.37 1227.94 0.09 599.26 0.29 0.00 0.00 3:40 1.4 0.64 0.56 N/A 0.0739 0.0879 26.37 0.00 0.00 0.00 0.00 0.00 26.37 1234.82 0.09 625.55 0.30 0.00 0.00 3:45 1.5 0.68 0.56 N/A 0.1194 0.1420 42.60 0.00 0.00 0.00 0.00 0.00 42.60 1241.70 0.09 668.06 0.32 0.00 0.00 3:50 1.5 0.68 0.56 N/A 0.1194 0.1420 42.60 0.00 0.00 0.00 0.00 0.00 42.60 1252.82 0.09 710.58 0.34 0.00 0.00 3:55 1.6 0.73 0.56 N/A 0.1648 0.1961 58.84 0.00 0.00 0.00 0.00 0.00 58.84 1263.95 0.09 769.33 0.37 0.00 0.00 4:00 1.6 0.73 0.56 N/A 0.1648 0.1961 58.84 0.00 0.00 0.00 0.00 0.00 58.84 1279.32 0.09 828.08 0.40 0.00 0.00 4:05 1.7 0.77 0.56 N/A 0.2103 0.2502 75.07 0.00 0.00 0.00 0.00 0.00 75.07 1294.70 0.09 903.06 0.44 0.00 0.00 4:10 1.8 0.82 0.56 N/A 0.2558 0.3044 91.31 0.00 0.00 0.00 0.00 0.00 91.31 1314.32 0.09 994.28 0.48 0.00 0.00 4:15 1.9 0.86 0.56 N/A 0.3013 0.3585 107.54 0.00 0.00 0.00 0.00 0.00 107.54 1338.19 0.09 1101.73 0.53 0.00 0.00 388

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24 Hour Storm in 15 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:15 0.2 0.04 0.99 0.04 0.0040 0.0048 4.33 0.00 0.00 0.00 0.00 0.00 4.33 1078.00 0.22 4.10 0.00 0.00 0.00 0:30 0.3 0.06 0.98 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1079.07 0.22 10.37 0.01 0.00 0.00 0:45 0.3 0.06 0.97 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1080.71 0.23 16.63 0.01 0.00 0.00 1:00 0.4 0.08 0.95 0.07 0.0081 0.0096 8.65 0.00 0.00 0.00 0.00 0.00 8.65 1082.35 0.23 25.06 0.01 0.00 0.00 1:15 0.3 0.06 0.94 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1084.56 0.23 31.32 0.02 0.00 0.00 1:30 0.3 0.06 0.93 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1086.20 0.23 37.58 0.02 0.00 0.00 1:45 0.3 0.06 0.92 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1087.84 0.23 43.85 0.02 0.00 0.00 2:00 0.4 0.08 0.91 0.07 0.0081 0.0096 8.65 0.00 0.00 0.00 0.00 0.00 8.65 1089.47 0.23 52.27 0.03 0.00 0.00 2:15 0.4 0.08 0.90 0.07 0.0081 0.0096 8.65 0.00 0.00 0.00 0.00 0.00 8.65 1091.68 0.23 60.70 0.03 0.00 0.00 2:30 0.4 0.08 0.89 0.07 0.0081 0.0096 8.65 0.00 0.00 0.00 0.00 0.00 8.65 1093.88 0.23 69.12 0.03 0.00 0.00 2:45 0.5 0.10 0.88 0.09 0.0101 0.0120 10.82 0.00 0.00 0.00 0.00 0.00 10.82 1096.09 0.23 79.71 0.04 0.00 0.00 3:00 0.5 0.10 0.87 0.09 0.0101 0.0120 10.82 0.00 0.00 0.00 0.00 0.00 10.82 1098.86 0.23 90.30 0.04 0.00 0.00 3:15 0.5 0.10 0.85 0.09 0.0101 0.0120 10.82 0.00 0.00 0.00 0.00 0.00 10.82 1101.63 0.23 100.88 0.05 0.00 0.00 3:30 0.5 0.10 0.84 0.09 0.0101 0.0120 10.82 0.00 0.00 0.00 0.00 0.00 10.82 1104.40 0.23 111.47 0.05 0.00 0.00 3:45 0.5 0.10 0.83 0.09 0.0101 0.0120 10.82 0.00 0.00 0.00 0.00 0.00 10.82 1107.17 0.23 122.05 0.06 0.00 0.00 4:00 0.6 0.12 0.82 0.11 0.0121 0.0144 12.98 0.00 0.00 0.00 0.00 0.00 12.98 1109.94 0.23 134.80 0.07 0.00 0.00 4:15 0.6 0.12 0.81 0.11 0.0121 0.0144 12.98 0.00 0.00 0.00 0.00 0.00 12.98 1113.28 0.23 147.55 0.07 0.00 0.00 4:30 0.7 0.14 0.80 0.13 0.0141 0.0168 15.14 0.00 0.00 0.00 0.00 0.00 15.14 1116.61 0.23 162.46 0.08 0.00 0.00 4:45 0.7 0.14 0.79 0.13 0.0141 0.0168 15.14 0.00 0.00 0.00 0.00 0.00 15.14 1120.51 0.23 177.36 0.09 0.00 0.00 5:00 0.8 0.16 0.78 0.15 0.0162 0.0192 17.30 0.00 0.00 0.00 0.00 0.00 17.30 1124.41 0.23 194.43 0.09 0.00 0.00 5:15 0.6 0.12 0.77 0.11 0.0121 0.0144 12.98 0.00 0.00 0.00 0.00 0.00 12.98 1128.88 0.24 207.18 0.10 0.00 0.00 5:30 0.7 0.14 0.76 0.13 0.0141 0.0168 15.14 0.00 0.00 0.00 0.00 0.00 15.14 1132.22 0.24 222.08 0.11 0.00 0.00 5:45 0.8 0.16 0.75 0.15 0.0162 0.0192 17.30 0.00 0.00 0.00 0.00 0.00 17.30 1136.12 0.24 239.15 0.12 0.00 0.00 6:00 0.8 0.16 0.74 0.15 0.0162 0.0192 17.30 0.00 0.00 0.00 0.00 0.00 17.30 1140.58 0.24 256.22 0.12 0.00 0.00 6:15 0.9 0.18 0.73 0.16 0.0182 0.0216 19.47 0.00 0.00 0.00 0.00 0.00 19.47 1145.05 0.24 275.45 0.13 0.00 0.00 6:30 0.9 0.18 0.72 0.16 0.0182 0.0216 19.47 0.00 0.00 0.00 0.00 0.00 19.47 1150.08 0.24 294.68 0.14 0.00 0.00 6:45 1 0.20 0.71 0.18 0.0202 0.0240 21.63 0.00 0.00 0.00 0.00 0.00 21.63 1155.11 0.24 316.07 0.15 0.00 0.00 7:00 1 0.20 0.70 0.18 0.0202 0.0240 21.63 0.00 0.00 0.00 0.00 0.00 21.63 1160.71 0.24 337.46 0.16 0.00 0.00 7:15 1 0.20 0.69 0.18 0.0202 0.0240 21.63 0.00 0.00 0.00 0.00 0.00 21.63 1166.31 0.24 358.85 0.17 0.00 0.00 7:30 1.1 0.22 0.68 0.20 0.0222 0.0264 23.79 0.00 0.00 0.00 0.00 0.00 23.79 1171.91 0.24 382.40 0.19 0.00 0.00 7:45 1.2 0.24 0.67 0.22 0.0242 0.0288 25.96 0.00 0.00 0.00 0.00 0.00 25.96 1178.07 0.25 408.11 0.20 0.00 0.00 8:00 1.3 0.26 0.66 0.24 0.0263 0.0312 28.12 0.00 0.00 0.00 0.00 0.00 28.12 1184.80 0.25 435.98 0.21 0.00 0.00 8:15 1.5 0.30 0.66 0.27 0.0303 0.0361 32.45 0.00 0.00 0.00 0.00 0.00 32.45 1192.09 0.25 468.18 0.23 0.00 0.00 8:30 1.5 0.30 0.65 0.27 0.0303 0.0361 32.45 0.00 0.00 0.00 0.00 0.00 32.45 1200.52 0.25 500.38 0.24 0.00 0.00 8:45 1.6 0.32 0.64 0.29 0.0323 0.0385 34.61 0.00 0.00 0.00 0.00 0.00 34.61 1208.94 0.25 534.73 0.26 0.00 0.00 9:00 1.7 0.34 0.63 0.31 0.0343 0.0409 36.77 0.00 0.00 0.00 0.00 0.00 36.77 1217.93 0.25 571.25 0.28 0.00 0.00 9:15 1.9 0.38 0.62 0.35 0.0384 0.0457 41.10 0.00 0.00 0.00 0.00 0.00 41.10 1227.49 0.26 612.10 0.30 0.00 0.00 9:30 2 0.40 0.61 0.36 0.0404 0.0481 43.26 0.00 0.00 0.00 0.00 0.00 43.26 1238.18 0.26 655.10 0.32 0.00 0.00 9:45 2.1 0.42 0.60 0.38 0.0424 0.0505 45.43 0.00 0.00 0.00 0.00 0.00 45.43 1249.43 0.26 700.27 0.34 0.00 0.00 10:00 2.2 0.44 0.59 0.40 0.0444 0.0529 47.59 0.00 0.00 0.00 0.00 0.00 47.59 1261.25 0.26 747.59 0.36 0.00 0.00 10:15 1.5 0.30 0.58 0.27 0.0303 0.0361 32.45 0.00 0.00 0.00 0.00 0.00 32.45 1273.63 0.27 779.77 0.38 0.00 0.00 10:30 1.5 0.30 0.58 0.27 0.0303 0.0361 32.45 0.00 0.00 0.00 0.00 0.00 32.45 1282.06 0.27 811.95 0.39 0.00 0.00 10:45 2 0.40 0.57 0.36 0.0404 0.0481 43.26 0.00 0.00 0.00 0.00 0.00 43.26 1290.48 0.27 854.95 0.42 0.00 0.00 11:00 2 0.40 0.56 0.36 0.0404 0.0481 43.26 0.00 0.00 0.00 0.00 0.00 43.26 1301.73 0.27 897.94 0.44 0.00 0.00 11:15 1.9 0.38 0.55 0.35 0.0384 0.0457 41.10 0.00 0.00 0.00 0.00 0.00 41.10 1312.98 0.27 938.76 0.46 0.00 0.00 11:30 1.9 0.38 0.54 0.35 0.0384 0.0457 41.10 0.00 0.00 0.00 0.00 0.00 41.10 1323.66 0.28 979.59 0.48 0.00 0.00 11:45 1.7 0.34 0.53 0.31 0.0343 0.0409 36.77 0.00 0.00 0.00 0.00 0.00 36.77 1334.34 0.28 1016.08 0.49 0.00 0.00 12:00 1.8 0.36 0.53 0.33 0.0364 0.0433 38.94 0.00 0.00 0.00 0.00 0.00 38.94 1343.89 0.28 1054.74 0.51 0.00 0.00 12:15 2.5 0.51 0.52 0.45 0.0505 0.0601 54.08 0.00 0.00 0.00 0.00 0.00 54.08 1354.01 0.28 1108.53 0.54 0.00 0.00 12:30 2.6 0.53 0.51 0.47 0.0525 0.0625 56.24 0.00 0.00 0.00 0.00 0.00 56.24 1368.09 0.29 1164.49 0.57 0.00 0.00 12:45 2.8 0.57 0.50 N/A 0.0622 0.0740 66.64 0.00 0.00 0.00 0.00 0.00 66.64 1382.73 0.29 1230.84 0.60 0.00 0.00 390

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HYDROLOGY CALCULATIONS - program updated 4-14-22 LC
Using the RCFC&WCD Short Cut Unit Hydrograph Method
Area Designations Area 1 VERSION 2 Area=1.09ac+0.09ac typ street frontage=1.18ac 5/7/2024 LOT 5
Drainage Area (ac.)1.1800 JOB NUMBER 22106
Unit time (minutes)5 5 5 15
100 Year Storm Duration (hrs)1 3 6 24
Total Precipitation (Plates D-4.4,E-5.2, 5.4, 5.6)(in.)2.41 3.10 3.79 5.05 from NOAA interactive website Soils Group A
AMC index II Runoff Number (plate E-6.1)32
Plate E-6.2 Pervious Area Loss Rate (Fp)(in/hr)0.74 (AMC II) Percentage of Impervious Cover (Ai)(%) (plate E-6.3)26.6 20% per the RCFC Hydrology Manual 1AC LOT-PLATE D 5.6 AND 0.09AC TYPICAL STREET FRONTAGE Weighted Average Loss Rate (F=Fp(1-.9Ai))(in./hr.)0.56 (used for 1, 3, and 6 hour storm, the 24 hour storm uses variable maximum loss rate per plate E-1.1 (3 of 6)) Low Loss Rate Percent (%) 90
Retention Basin Percolation Rate (in/hr)0.01 (also used for drywell percolation rate) Percolation is taken incrementally.

Drywell design factors Upper sec. (ft.)=0.001 Lower sec. (ft.)=0.001 Ring diam. (ft.) =0.001 Drywell lower max. (cf)=0.00 Upper max.(cf)=0.00 Gravel bed width around drywell=0.001 Drywell total(cf)=0.00 Ret. Basin design (area, depth) Top =3234 s.f.Bot. =1078 s.f.Max. Depth (d)=4 Max. storage=8238.87 (d/3)*(bottom+top+(bottom*top)^0.50) Formulas vol=(h/3)*(bottom+top+(bottom*top)^0.50) area=bottom+(h/d)*(top-bottom)h=(vol*3)/(bottom+top+(bottom*top)^0.5)(values must be non-zero or error occurs) Outside input from:N/A 3.25
1 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 3.7 1.0700 0.5628 N/A 0.5072 0.6035 181.04 0.00 0.00 0.00 0.00 0.00 181.04 1078.00 0.07 180.97 0.09 0.00 0.00 0:10 4.8 1.3882 0.5628 N/A 0.8253 0.9820 294.60 0.00 0.00 0.00 0.00 0.00 294.60 1125.36 0.08 475.49 0.23 0.00 0.00 0:15 5.1 1.4749 0.5628 N/A 0.9121 1.0852 325.57 0.00 0.00 0.00 0.00 0.00 325.57 1202.43 0.08 800.97 0.39 0.00 0.00 0:20 4.9 1.4171 0.5628 N/A 0.8542 1.0164 304.92 0.00 0.00 0.00 0.00 0.00 304.92 1287.60 0.09 1105.80 0.54 0.00 0.00 0:25 6.6 1.9087 0.5628 N/A 1.3459 1.6014 480.41 0.00 0.00 0.00 0.00 0.00 480.41 1367.37 0.09 1586.11 0.77 0.00 0.00 0:30 7.3 2.1112 0.5628 N/A 1.5483 1.8422 552.67 0.00 0.00 0.00 0.00 0.00 552.67 1493.06 0.10 2138.68 1.04 0.00 0.00 0:35 8.4 2.4293 0.5628 N/A 1.8664 2.2207 666.22 0.00 0.00 0.00 0.00 0.00 666.22 1637.66 0.11 2804.79 1.36 0.00 0.00 0:40 9 2.6028 0.5628 N/A 2.0400 2.4272 728.16 0.00 0.00 0.00 0.00 0.00 728.16 1811.98 0.13 3532.83 1.72 0.00 0.00 0:45 12.3 3.5572 0.5628 N/A 2.9943 3.5627 1068.82 0.00 0.00 0.00 0.00 0.00 1068.82 2002.49 0.14 4601.51 2.23 0.00 0.00 0:50 17.6 5.0899 0.5628 N/A 4.5271 5.3865 1615.94 0.00 0.00 0.00 0.00 0.00 1615.94 2282.15 0.16 6217.29 3.02 0.00 0.00 0:55 16.1 4.6561 0.5628 N/A 4.0933 4.8703 1461.09 0.00 0.00 0.00 0.00 0.00 1461.09 2704.98 0.19 7678.20 3.73 0.00 0.00 1:00 4.2 1.2146 0.5628 N/A 0.6518 0.7755 232.66 0.00 0.00 0.00 0.00 0.00 232.66 3087.28 0.21 7910.64 3.84 0.00 0.00 MAX DEPTH 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3148.11 0.22 7910.43 3.84 0.00 0.00 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3148.05 0.22 7910.21 3.84 0.00 0.00 1:15 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3147.99 0.22 7909.99 3.84 0.00 0.00 Total volume (cf)7912.11 Total Overflow (cf)0.00
392
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2 of 6
3 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 1.3 0.48 0.56 0.44 0.0484 0.0575 17.26 0.00 0.00 0.00 0.00 0.00 17.26 1078.00 0.07 17.19 0.01 0.00 0.00 0:10 1.3 0.48 0.56 0.44 0.0484 0.0575 17.26 0.00 0.00 0.00 0.00 0.00 17.26 1082.50 0.08 34.37 0.02 0.00 0.00 0:15 1.1 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1087.00 0.08 48.91 0.02 0.00 0.00 0:20 1.5 0.56 0.56 0.50 0.0558 0.0664 19.92 0.00 0.00 0.00 0.00 0.00 19.92 1090.80 0.08 68.75 0.03 0.00 0.00 0:25 1.5 0.56 0.56 0.50 0.0558 0.0664 19.92 0.00 0.00 0.00 0.00 0.00 19.92 1095.99 0.08 88.59 0.04 0.00 0.00 0:30 1.8 0.67 0.56 N/A 0.1068 0.1270 38.11 0.00 0.00 0.00 0.00 0.00 38.11 1101.18 0.08 126.62 0.06 0.00 0.00 0:35 1.5 0.56 0.56 0.50 0.0558 0.0664 19.92 0.00 0.00 0.00 0.00 0.00 19.92 1111.13 0.08 146.46 0.07 0.00 0.00 0:40 1.8 0.67 0.56 N/A 0.1068 0.1270 38.11 0.00 0.00 0.00 0.00 0.00 38.11 1116.33 0.08 184.49 0.09 0.00 0.00 0:45 1.8 0.67 0.56 N/A 0.1068 0.1270 38.11 0.00 0.00 0.00 0.00 0.00 38.11 1126.28 0.08 222.52 0.11 0.00 0.00 0:50 1.5 0.56 0.56 0.50 0.0558 0.0664 19.92 0.00 0.00 0.00 0.00 0.00 19.92 1136.23 0.08 242.36 0.12 0.00 0.00 0:55 1.6 0.60 0.56 0.54 0.0595 0.0708 21.25 0.00 0.00 0.00 0.00 0.00 21.25 1141.42 0.08 263.52 0.13 0.00 0.00 1:00 1.8 0.67 0.56 N/A 0.1068 0.1270 38.11 0.00 0.00 0.00 0.00 0.00 38.11 1146.96 0.08 301.55 0.15 0.00 0.00 1:05 2.2 0.82 0.56 N/A 0.2556 0.3041 91.22 0.00 0.00 0.00 0.00 0.00 91.22 1156.91 0.08 392.69 0.19 0.00 0.00 1:10 2.2 0.82 0.56 N/A 0.2556 0.3041 91.22 0.00 0.00 0.00 0.00 0.00 91.22 1180.76 0.08 483.83 0.23 0.00 0.00 1:15 2.2 0.82 0.56 N/A 0.2556 0.3041 91.22 0.00 0.00 0.00 0.00 0.00 91.22 1204.61 0.08 574.97 0.28 0.00 0.00 1:20 2 0.74 0.56 N/A 0.1812 0.2155 64.66 0.00 0.00 0.00 0.00 0.00 64.66 1228.46 0.09 639.54 0.31 0.00 0.00 1:25 2.6 0.97 0.56 N/A 0.4044 0.4811 144.33 0.00 0.00 0.00 0.00 0.00 144.33 1245.36 0.09 783.79 0.38 0.00 0.00 1:30 2.7 1.00 0.56 N/A 0.4416 0.5254 157.61 0.00 0.00 0.00 0.00 0.00 157.61 1283.11 0.09 941.32 0.46 0.00 0.00 1:35 2.4 0.89 0.56 N/A 0.3300 0.3926 117.78 0.00 0.00 0.00 0.00 0.00 117.78 1324.33 0.09 1059.00 0.51 0.00 0.00 1:40 2.7 1.00 0.56 N/A 0.4416 0.5254 157.61 0.00 0.00 0.00 0.00 0.00 157.61 1355.13 0.09 1216.52 0.59 0.00 0.00 1:45 3.3 1.23 0.56 N/A 0.6648 0.7909 237.28 0.00 0.00 0.00 0.00 0.00 237.28 1396.35 0.10 1453.71 0.71 0.00 0.00 1:50 3.1 1.15 0.56 N/A 0.5904 0.7024 210.73 0.00 0.00 0.00 0.00 0.00 210.73 1458.42 0.10 1664.34 0.81 0.00 0.00 1:55 2.9 1.08 0.56 N/A 0.5160 0.6139 184.17 0.00 0.00 0.00 0.00 0.00 184.17 1513.53 0.11 1848.40 0.90 0.00 0.00 2:00 3 1.12 0.56 N/A 0.5532 0.6582 197.45 0.00 0.00 0.00 0.00 0.00 197.45 1561.70 0.11 2045.74 0.99 0.00 0.00 2:05 3.1 1.15 0.56 N/A 0.5904 0.7024 210.73 0.00 0.00 0.00 0.00 0.00 210.73 1613.34 0.11 2256.36 1.10 0.00 0.00 2:10 4.2 1.56 0.56 N/A 0.9996 1.1893 356.79 0.00 0.00 0.00 0.00 0.00 356.79 1668.46 0.12 2613.03 1.27 0.00 0.00 2:15 5 1.86 0.56 N/A 1.2972 1.5434 463.02 0.00 0.00 0.00 0.00 0.00 463.02 1761.80 0.12 3075.93 1.49 0.00 0.00 2:20 3.5 1.30 0.56 N/A 0.7392 0.8795 263.84 0.00 0.00 0.00 0.00 0.00 263.84 1882.93 0.13 3339.64 1.62 0.00 0.00 2:25 6.8 2.53 0.56 N/A 1.9668 2.3401 702.03 0.00 0.00 0.00 0.00 0.00 702.03 1951.94 0.14 4041.54 1.96 0.00 0.00 2:30 7.3 2.72 0.56 N/A 2.1528 2.5614 768.43 0.00 0.00 0.00 0.00 0.00 768.43 2135.62 0.15 4809.82 2.34 0.00 0.00 2:35 8.2 3.05 0.56 N/A 2.4876 2.9598 887.93 0.00 0.00 0.00 0.00 0.00 887.93 2336.66 0.16 5697.59 2.77 0.00 0.00 2:40 5.9 2.19 0.56 N/A 1.6320 1.9418 582.53 0.00 0.00 0.00 0.00 0.00 582.53 2568.98 0.18 6279.94 3.05 0.00 0.00 2:45 2 0.74 0.56 N/A 0.1812 0.2155 64.66 0.00 0.00 0.00 0.00 0.00 64.66 2721.37 0.19 6344.41 3.08 0.00 0.00 2:50 1.8 0.67 0.56 N/A 0.1068 0.1270 38.11 0.00 0.00 0.00 0.00 0.00 38.11 2738.25 0.19 6382.33 3.10 0.00 0.00 2:55 1.8 0.67 0.56 N/A 0.1068 0.1270 38.11 0.00 0.00 0.00 0.00 0.00 38.11 2748.17 0.19 6420.24 3.12 0.00 0.00 3:00 0.6 0.22 0.56 0.20 0.0223 0.0266 7.97 0.00 0.00 0.00 0.00 0.00 7.97 2758.09 0.19 6428.02 3.12 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2760.13 0.19 6427.83 3.12 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2760.08 0.19 6427.64 3.12 0.00 0.00 3:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2760.02 0.19 6427.44 3.12 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2759.97 0.19 6427.25 3.12 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2759.92 0.19 6427.06 3.12 0.00 0.00 3:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2759.87 0.19 6426.87 3.12 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2759.82 0.19 6426.68 3.12 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2759.77 0.19 6426.49 3.12 0.00 0.00 Total volume (cf)6431.91 Total Overflow (cf)0.00
393

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6 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 0.5 0.23 0.56 0.20 0.0227 0.0271 8.12 0.00 0.00 0.00 0.00 0.00 8.12 1078.00 0.07 8.04 0.00 0.00 0.00 0:10 0.6 0.27 0.56 0.25 0.0273 0.0325 9.74 0.00 0.00 0.00 0.00 0.00 9.74 1080.10 0.08 17.71 0.01 0.00 0.00 0:15 0.6 0.27 0.56 0.25 0.0273 0.0325 9.74 0.00 0.00 0.00 0.00 0.00 9.74 1082.63 0.08 27.37 0.01 0.00 0.00 0:20 0.6 0.27 0.56 0.25 0.0273 0.0325 9.74 0.00 0.00 0.00 0.00 0.00 9.74 1085.16 0.08 37.04 0.02 0.00 0.00 0:25 0.6 0.27 0.56 0.25 0.0273 0.0325 9.74 0.00 0.00 0.00 0.00 0.00 9.74 1087.69 0.08 46.70 0.02 0.00 0.00 0:30 0.7 0.32 0.56 0.29 0.0318 0.0379 11.36 0.00 0.00 0.00 0.00 0.00 11.36 1090.22 0.08 57.99 0.03 0.00 0.00 0:35 0.7 0.32 0.56 0.29 0.0318 0.0379 11.36 0.00 0.00 0.00 0.00 0.00 11.36 1093.18 0.08 69.28 0.03 0.00 0.00 0:40 0.7 0.32 0.56 0.29 0.0318 0.0379 11.36 0.00 0.00 0.00 0.00 0.00 11.36 1096.13 0.08 80.57 0.04 0.00 0.00 0:45 0.7 0.32 0.56 0.29 0.0318 0.0379 11.36 0.00 0.00 0.00 0.00 0.00 11.36 1099.08 0.08 91.85 0.04 0.00 0.00 0:50 0.7 0.32 0.56 0.29 0.0318 0.0379 11.36 0.00 0.00 0.00 0.00 0.00 11.36 1102.04 0.08 103.14 0.05 0.00 0.00 0:55 0.7 0.32 0.56 0.29 0.0318 0.0379 11.36 0.00 0.00 0.00 0.00 0.00 11.36 1104.99 0.08 114.43 0.06 0.00 0.00 1:00 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1107.94 0.08 127.34 0.06 0.00 0.00 1:05 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1111.32 0.08 140.25 0.07 0.00 0.00 1:10 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1114.70 0.08 153.16 0.07 0.00 0.00 1:15 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1118.08 0.08 166.07 0.08 0.00 0.00 1:20 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1121.46 0.08 178.98 0.09 0.00 0.00 1:25 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1124.84 0.08 191.89 0.09 0.00 0.00 1:30 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1128.21 0.08 204.80 0.10 0.00 0.00 1:35 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1131.59 0.08 217.70 0.11 0.00 0.00 1:40 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1134.97 0.08 230.61 0.11 0.00 0.00 1:45 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1138.35 0.08 243.52 0.12 0.00 0.00 1:50 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1141.73 0.08 256.43 0.12 0.00 0.00 1:55 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1145.10 0.08 269.34 0.13 0.00 0.00 2:00 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1148.48 0.08 283.87 0.14 0.00 0.00 2:05 0.8 0.36 0.56 0.33 0.0364 0.0433 12.99 0.00 0.00 0.00 0.00 0.00 12.99 1152.28 0.08 296.78 0.14 0.00 0.00 2:10 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1155.66 0.08 311.31 0.15 0.00 0.00 2:15 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1159.46 0.08 325.84 0.16 0.00 0.00 2:20 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1163.27 0.08 340.37 0.17 0.00 0.00 2:25 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1167.07 0.08 354.90 0.17 0.00 0.00 2:30 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1170.87 0.08 369.42 0.18 0.00 0.00 2:35 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1174.67 0.08 383.95 0.19 0.00 0.00 2:40 0.9 0.41 0.56 0.37 0.0409 0.0487 14.61 0.00 0.00 0.00 0.00 0.00 14.61 1178.48 0.08 398.48 0.19 0.00 0.00 2:45 1 0.45 0.56 0.41 0.0455 0.0541 16.23 0.00 0.00 0.00 0.00 0.00 16.23 1182.28 0.08 414.63 0.20 0.00 0.00 2:50 1 0.45 0.56 0.41 0.0455 0.0541 16.23 0.00 0.00 0.00 0.00 0.00 16.23 1186.50 0.08 430.79 0.21 0.00 0.00 2:55 1 0.45 0.56 0.41 0.0455 0.0541 16.23 0.00 0.00 0.00 0.00 0.00 16.23 1190.73 0.08 446.94 0.22 0.00 0.00 3:00 1 0.45 0.56 0.41 0.0455 0.0541 16.23 0.00 0.00 0.00 0.00 0.00 16.23 1194.96 0.08 463.09 0.22 0.00 0.00 3:05 1 0.45 0.56 0.41 0.0455 0.0541 16.23 0.00 0.00 0.00 0.00 0.00 16.23 1199.18 0.08 479.24 0.23 0.00 0.00 3:10 1.1 0.50 0.56 0.45 0.0500 0.0595 17.86 0.00 0.00 0.00 0.00 0.00 17.86 1203.41 0.08 497.01 0.24 0.00 0.00 3:15 1.1 0.50 0.56 0.45 0.0500 0.0595 17.86 0.00 0.00 0.00 0.00 0.00 17.86 1208.06 0.08 514.79 0.25 0.00 0.00 3:20 1.1 0.50 0.56 0.45 0.0500 0.0595 17.86 0.00 0.00 0.00 0.00 0.00 17.86 1212.71 0.08 532.56 0.26 0.00 0.00 3:25 1.2 0.55 0.56 0.49 0.0546 0.0649 19.48 0.00 0.00 0.00 0.00 0.00 19.48 1217.36 0.08 551.96 0.27 0.00 0.00 3:30 1.3 0.59 0.56 0.53 0.0591 0.0703 21.10 0.00 0.00 0.00 0.00 0.00 21.10 1222.44 0.08 572.98 0.28 0.00 0.00 3:35 1.4 0.64 0.56 N/A 0.0739 0.0879 26.37 0.00 0.00 0.00 0.00 0.00 26.37 1227.94 0.09 599.26 0.29 0.00 0.00 3:40 1.4 0.64 0.56 N/A 0.0739 0.0879 26.37 0.00 0.00 0.00 0.00 0.00 26.37 1234.82 0.09 625.55 0.30 0.00 0.00 3:45 1.5 0.68 0.56 N/A 0.1194 0.1420 42.60 0.00 0.00 0.00 0.00 0.00 42.60 1241.70 0.09 668.06 0.32 0.00 0.00 3:50 1.5 0.68 0.56 N/A 0.1194 0.1420 42.60 0.00 0.00 0.00 0.00 0.00 42.60 1252.82 0.09 710.58 0.34 0.00 0.00 3:55 1.6 0.73 0.56 N/A 0.1648 0.1961 58.84 0.00 0.00 0.00 0.00 0.00 58.84 1263.95 0.09 769.33 0.37 0.00 0.00 4:00 1.6 0.73 0.56 N/A 0.1648 0.1961 58.84 0.00 0.00 0.00 0.00 0.00 58.84 1279.32 0.09 828.08 0.40 0.00 0.00 4:05 1.7 0.77 0.56 N/A 0.2103 0.2502 75.07 0.00 0.00 0.00 0.00 0.00 75.07 1294.70 0.09 903.06 0.44 0.00 0.00 4:10 1.8 0.82 0.56 N/A 0.2558 0.3044 91.31 0.00 0.00 0.00 0.00 0.00 91.31 1314.32 0.09 994.28 0.48 0.00 0.00 4:15 1.9 0.86 0.56 N/A 0.3013 0.3585 107.54 0.00 0.00 0.00 0.00 0.00 107.54 1338.19 0.09 1101.73 0.53 0.00 0.00 394

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24 Hour Storm in 15 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:15 0.2 0.04 0.99 0.04 0.0040 0.0048 4.33 0.00 0.00 0.00 0.00 0.00 4.33 1078.00 0.22 4.10 0.00 0.00 0.00 0:30 0.3 0.06 0.98 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1079.07 0.22 10.37 0.01 0.00 0.00 0:45 0.3 0.06 0.97 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1080.71 0.23 16.63 0.01 0.00 0.00 1:00 0.4 0.08 0.95 0.07 0.0081 0.0096 8.65 0.00 0.00 0.00 0.00 0.00 8.65 1082.35 0.23 25.06 0.01 0.00 0.00 1:15 0.3 0.06 0.94 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1084.56 0.23 31.32 0.02 0.00 0.00 1:30 0.3 0.06 0.93 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1086.20 0.23 37.58 0.02 0.00 0.00 1:45 0.3 0.06 0.92 0.05 0.0061 0.0072 6.49 0.00 0.00 0.00 0.00 0.00 6.49 1087.84 0.23 43.85 0.02 0.00 0.00 2:00 0.4 0.08 0.91 0.07 0.0081 0.0096 8.65 0.00 0.00 0.00 0.00 0.00 8.65 1089.47 0.23 52.27 0.03 0.00 0.00 2:15 0.4 0.08 0.90 0.07 0.0081 0.0096 8.65 0.00 0.00 0.00 0.00 0.00 8.65 1091.68 0.23 60.70 0.03 0.00 0.00 2:30 0.4 0.08 0.89 0.07 0.0081 0.0096 8.65 0.00 0.00 0.00 0.00 0.00 8.65 1093.88 0.23 69.12 0.03 0.00 0.00 2:45 0.5 0.10 0.88 0.09 0.0101 0.0120 10.82 0.00 0.00 0.00 0.00 0.00 10.82 1096.09 0.23 79.71 0.04 0.00 0.00 3:00 0.5 0.10 0.87 0.09 0.0101 0.0120 10.82 0.00 0.00 0.00 0.00 0.00 10.82 1098.86 0.23 90.30 0.04 0.00 0.00 3:15 0.5 0.10 0.85 0.09 0.0101 0.0120 10.82 0.00 0.00 0.00 0.00 0.00 10.82 1101.63 0.23 100.88 0.05 0.00 0.00 3:30 0.5 0.10 0.84 0.09 0.0101 0.0120 10.82 0.00 0.00 0.00 0.00 0.00 10.82 1104.40 0.23 111.47 0.05 0.00 0.00 3:45 0.5 0.10 0.83 0.09 0.0101 0.0120 10.82 0.00 0.00 0.00 0.00 0.00 10.82 1107.17 0.23 122.05 0.06 0.00 0.00 4:00 0.6 0.12 0.82 0.11 0.0121 0.0144 12.98 0.00 0.00 0.00 0.00 0.00 12.98 1109.94 0.23 134.80 0.07 0.00 0.00 4:15 0.6 0.12 0.81 0.11 0.0121 0.0144 12.98 0.00 0.00 0.00 0.00 0.00 12.98 1113.28 0.23 147.55 0.07 0.00 0.00 4:30 0.7 0.14 0.80 0.13 0.0141 0.0168 15.14 0.00 0.00 0.00 0.00 0.00 15.14 1116.61 0.23 162.46 0.08 0.00 0.00 4:45 0.7 0.14 0.79 0.13 0.0141 0.0168 15.14 0.00 0.00 0.00 0.00 0.00 15.14 1120.51 0.23 177.36 0.09 0.00 0.00 5:00 0.8 0.16 0.78 0.15 0.0162 0.0192 17.30 0.00 0.00 0.00 0.00 0.00 17.30 1124.41 0.23 194.43 0.09 0.00 0.00 5:15 0.6 0.12 0.77 0.11 0.0121 0.0144 12.98 0.00 0.00 0.00 0.00 0.00 12.98 1128.88 0.24 207.18 0.10 0.00 0.00 5:30 0.7 0.14 0.76 0.13 0.0141 0.0168 15.14 0.00 0.00 0.00 0.00 0.00 15.14 1132.22 0.24 222.08 0.11 0.00 0.00 5:45 0.8 0.16 0.75 0.15 0.0162 0.0192 17.30 0.00 0.00 0.00 0.00 0.00 17.30 1136.12 0.24 239.15 0.12 0.00 0.00 6:00 0.8 0.16 0.74 0.15 0.0162 0.0192 17.30 0.00 0.00 0.00 0.00 0.00 17.30 1140.58 0.24 256.22 0.12 0.00 0.00 6:15 0.9 0.18 0.73 0.16 0.0182 0.0216 19.47 0.00 0.00 0.00 0.00 0.00 19.47 1145.05 0.24 275.45 0.13 0.00 0.00 6:30 0.9 0.18 0.72 0.16 0.0182 0.0216 19.47 0.00 0.00 0.00 0.00 0.00 19.47 1150.08 0.24 294.68 0.14 0.00 0.00 6:45 1 0.20 0.71 0.18 0.0202 0.0240 21.63 0.00 0.00 0.00 0.00 0.00 21.63 1155.11 0.24 316.07 0.15 0.00 0.00 7:00 1 0.20 0.70 0.18 0.0202 0.0240 21.63 0.00 0.00 0.00 0.00 0.00 21.63 1160.71 0.24 337.46 0.16 0.00 0.00 7:15 1 0.20 0.69 0.18 0.0202 0.0240 21.63 0.00 0.00 0.00 0.00 0.00 21.63 1166.31 0.24 358.85 0.17 0.00 0.00 7:30 1.1 0.22 0.68 0.20 0.0222 0.0264 23.79 0.00 0.00 0.00 0.00 0.00 23.79 1171.91 0.24 382.40 0.19 0.00 0.00 7:45 1.2 0.24 0.67 0.22 0.0242 0.0288 25.96 0.00 0.00 0.00 0.00 0.00 25.96 1178.07 0.25 408.11 0.20 0.00 0.00 8:00 1.3 0.26 0.66 0.24 0.0263 0.0312 28.12 0.00 0.00 0.00 0.00 0.00 28.12 1184.80 0.25 435.98 0.21 0.00 0.00 8:15 1.5 0.30 0.66 0.27 0.0303 0.0361 32.45 0.00 0.00 0.00 0.00 0.00 32.45 1192.09 0.25 468.18 0.23 0.00 0.00 8:30 1.5 0.30 0.65 0.27 0.0303 0.0361 32.45 0.00 0.00 0.00 0.00 0.00 32.45 1200.52 0.25 500.38 0.24 0.00 0.00 8:45 1.6 0.32 0.64 0.29 0.0323 0.0385 34.61 0.00 0.00 0.00 0.00 0.00 34.61 1208.94 0.25 534.73 0.26 0.00 0.00 9:00 1.7 0.34 0.63 0.31 0.0343 0.0409 36.77 0.00 0.00 0.00 0.00 0.00 36.77 1217.93 0.25 571.25 0.28 0.00 0.00 9:15 1.9 0.38 0.62 0.35 0.0384 0.0457 41.10 0.00 0.00 0.00 0.00 0.00 41.10 1227.49 0.26 612.10 0.30 0.00 0.00 9:30 2 0.40 0.61 0.36 0.0404 0.0481 43.26 0.00 0.00 0.00 0.00 0.00 43.26 1238.18 0.26 655.10 0.32 0.00 0.00 9:45 2.1 0.42 0.60 0.38 0.0424 0.0505 45.43 0.00 0.00 0.00 0.00 0.00 45.43 1249.43 0.26 700.27 0.34 0.00 0.00 10:00 2.2 0.44 0.59 0.40 0.0444 0.0529 47.59 0.00 0.00 0.00 0.00 0.00 47.59 1261.25 0.26 747.59 0.36 0.00 0.00 10:15 1.5 0.30 0.58 0.27 0.0303 0.0361 32.45 0.00 0.00 0.00 0.00 0.00 32.45 1273.63 0.27 779.77 0.38 0.00 0.00 10:30 1.5 0.30 0.58 0.27 0.0303 0.0361 32.45 0.00 0.00 0.00 0.00 0.00 32.45 1282.06 0.27 811.95 0.39 0.00 0.00 10:45 2 0.40 0.57 0.36 0.0404 0.0481 43.26 0.00 0.00 0.00 0.00 0.00 43.26 1290.48 0.27 854.95 0.42 0.00 0.00 11:00 2 0.40 0.56 0.36 0.0404 0.0481 43.26 0.00 0.00 0.00 0.00 0.00 43.26 1301.73 0.27 897.94 0.44 0.00 0.00 11:15 1.9 0.38 0.55 0.35 0.0384 0.0457 41.10 0.00 0.00 0.00 0.00 0.00 41.10 1312.98 0.27 938.76 0.46 0.00 0.00 11:30 1.9 0.38 0.54 0.35 0.0384 0.0457 41.10 0.00 0.00 0.00 0.00 0.00 41.10 1323.66 0.28 979.59 0.48 0.00 0.00 11:45 1.7 0.34 0.53 0.31 0.0343 0.0409 36.77 0.00 0.00 0.00 0.00 0.00 36.77 1334.34 0.28 1016.08 0.49 0.00 0.00 12:00 1.8 0.36 0.53 0.33 0.0364 0.0433 38.94 0.00 0.00 0.00 0.00 0.00 38.94 1343.89 0.28 1054.74 0.51 0.00 0.00 12:15 2.5 0.51 0.52 0.45 0.0505 0.0601 54.08 0.00 0.00 0.00 0.00 0.00 54.08 1354.01 0.28 1108.53 0.54 0.00 0.00 12:30 2.6 0.53 0.51 0.47 0.0525 0.0625 56.24 0.00 0.00 0.00 0.00 0.00 56.24 1368.09 0.29 1164.49 0.57 0.00 0.00 12:45 2.8 0.57 0.50 N/A 0.0622 0.0740 66.64 0.00 0.00 0.00 0.00 0.00 66.64 1382.73 0.29 1230.84 0.60 0.00 0.00 396

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HYDROLOGY CALCULATIONS - program updated 4-14-22 LC
Using the RCFC&WCD Short Cut Unit Hydrograph Method
Area Designations Area 1 VERSION 2 Area=1.16ac+0.09ac typ street frontage=1.25ac 5/7/2024 LOT 6
Drainage Area (ac.)1.2500 JOB NUMBER 22106
Unit time (minutes)5 5 5 15
100 Year Storm Duration (hrs)1 3 6 24
Total Precipitation (Plates D-4.4,E-5.2, 5.4, 5.6)(in.)2.41 3.10 3.79 5.05 from NOAA interactive website Soils Group A
AMC index II Runoff Number (plate E-6.1)32
Plate E-6.2 Pervious Area Loss Rate (Fp)(in/hr)0.74 (AMC II) Percentage of Impervious Cover (Ai)(%) (plate E-6.3)26.6 20% per the RCFC Hydrology Manual 1AC LOT-PLATE D 5.6 AND 0.09AC TYPICAL STREET FRONTAGE Weighted Average Loss Rate (F=Fp(1-.9Ai))(in./hr.)0.56 (used for 1, 3, and 6 hour storm, the 24 hour storm uses variable maximum loss rate per plate E-1.1 (3 of 6)) Low Loss Rate Percent (%) 90
Retention Basin Percolation Rate (in/hr)0.01 (also used for drywell percolation rate) Percolation is taken incrementally.

Drywell design factors Upper sec. (ft.)=0.001 Lower sec. (ft.)=0.001 Ring diam. (ft.) =0.001 Drywell lower max. (cf)=0.00 Upper max.(cf)=0.00 Gravel bed width around drywell=0.001 Drywell total(cf)=0.00 Ret. Basin design (area, depth) Top =3304 s.f.Bot. =1123 s.f.Max. Depth (d)=4 Max. storage=8470.98 (d/3)*(bottom+top+(bottom*top)^0.50) Formulas vol=(h/3)*(bottom+top+(bottom*top)^0.50) area=bottom+(h/d)*(top-bottom)h=(vol*3)/(bottom+top+(bottom*top)^0.5)(values must be non-zero or error occurs) Outside input from:N/A 3.25
1 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 3.7 1.0700 0.5628 N/A 0.5072 0.6393 191.78 0.00 0.00 0.00 0.00 0.00 191.78 1123.00 0.08 191.71 0.09 0.00 0.00 0:10 4.8 1.3882 0.5628 N/A 0.8253 1.0402 312.07 0.00 0.00 0.00 0.00 0.00 312.07 1172.36 0.08 503.70 0.24 0.00 0.00 0:15 5.1 1.4749 0.5628 N/A 0.9121 1.1496 344.88 0.00 0.00 0.00 0.00 0.00 344.88 1252.69 0.09 848.49 0.40 0.00 0.00 0:20 4.9 1.4171 0.5628 N/A 0.8542 1.0767 323.01 0.00 0.00 0.00 0.00 0.00 323.01 1341.46 0.09 1171.40 0.55 0.00 0.00 0:25 6.6 1.9087 0.5628 N/A 1.3459 1.6964 508.91 0.00 0.00 0.00 0.00 0.00 508.91 1424.60 0.10 1680.21 0.79 0.00 0.00 0:30 7.3 2.1112 0.5628 N/A 1.5483 1.9515 585.46 0.00 0.00 0.00 0.00 0.00 585.46 1555.60 0.11 2265.56 1.07 0.00 0.00 0:35 8.4 2.4293 0.5628 N/A 1.8664 2.3525 705.75 0.00 0.00 0.00 0.00 0.00 705.75 1706.31 0.12 2971.19 1.40 0.00 0.00 0:40 9 2.6028 0.5628 N/A 2.0400 2.5712 771.36 0.00 0.00 0.00 0.00 0.00 771.36 1887.98 0.13 3742.42 1.77 0.00 0.00 0:45 12.3 3.5572 0.5628 N/A 2.9943 3.7741 1132.23 0.00 0.00 0.00 0.00 0.00 1132.23 2086.55 0.14 4874.50 2.30 0.00 0.00 0:50 17.6 5.0899 0.5628 N/A 4.5271 5.7060 1711.80 0.00 0.00 0.00 0.00 0.00 1711.80 2378.02 0.17 6586.13 3.11 0.00 0.00 0:55 16.1 4.6561 0.5628 N/A 4.0933 5.1592 1547.77 0.00 0.00 0.00 0.00 0.00 1547.77 2818.71 0.20 8133.71 3.84 0.00 0.00 1:00 4.2 1.2146 0.5628 N/A 0.6518 0.8215 246.46 0.00 0.00 0.00 0.00 0.00 246.46 3217.16 0.22 8379.95 3.96 0.00 0.00 MAX DEPTH 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3280.56 0.23 8379.72 3.96 0.00 0.00 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3280.50 0.23 8379.49 3.96 0.00 0.00 1:15 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3280.44 0.23 8379.26 3.96 0.00 0.00 Total volume (cf)8381.47 Total Overflow (cf)0.00
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3 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 1.3 0.48 0.56 0.44 0.0484 0.0610 18.29 0.00 0.00 0.00 0.00 0.00 18.29 1123.00 0.08 18.21 0.01 0.00 0.00 0:10 1.3 0.48 0.56 0.44 0.0484 0.0610 18.29 0.00 0.00 0.00 0.00 0.00 18.29 1127.69 0.08 36.42 0.02 0.00 0.00 0:15 1.1 0.41 0.56 0.37 0.0409 0.0516 15.47 0.00 0.00 0.00 0.00 0.00 15.47 1132.38 0.08 51.81 0.02 0.00 0.00 0:20 1.5 0.56 0.56 0.50 0.0558 0.0703 21.10 0.00 0.00 0.00 0.00 0.00 21.10 1136.34 0.08 72.83 0.03 0.00 0.00 0:25 1.5 0.56 0.56 0.50 0.0558 0.0703 21.10 0.00 0.00 0.00 0.00 0.00 21.10 1141.75 0.08 93.85 0.04 0.00 0.00 0:30 1.8 0.67 0.56 N/A 0.1068 0.1346 40.37 0.00 0.00 0.00 0.00 0.00 40.37 1147.16 0.08 134.14 0.06 0.00 0.00 0:35 1.5 0.56 0.56 0.50 0.0558 0.0703 21.10 0.00 0.00 0.00 0.00 0.00 21.10 1157.54 0.08 155.16 0.07 0.00 0.00 0:40 1.8 0.67 0.56 N/A 0.1068 0.1346 40.37 0.00 0.00 0.00 0.00 0.00 40.37 1162.95 0.08 195.44 0.09 0.00 0.00 0:45 1.8 0.67 0.56 N/A 0.1068 0.1346 40.37 0.00 0.00 0.00 0.00 0.00 40.37 1173.32 0.08 235.73 0.11 0.00 0.00 0:50 1.5 0.56 0.56 0.50 0.0558 0.0703 21.10 0.00 0.00 0.00 0.00 0.00 21.10 1183.69 0.08 256.75 0.12 0.00 0.00 0:55 1.6 0.60 0.56 0.54 0.0595 0.0750 22.51 0.00 0.00 0.00 0.00 0.00 22.51 1189.10 0.08 279.17 0.13 0.00 0.00 1:00 1.8 0.67 0.56 N/A 0.1068 0.1346 40.37 0.00 0.00 0.00 0.00 0.00 40.37 1194.88 0.08 319.45 0.15 0.00 0.00 1:05 2.2 0.82 0.56 N/A 0.2556 0.3221 96.63 0.00 0.00 0.00 0.00 0.00 96.63 1205.25 0.08 416.00 0.20 0.00 0.00 1:10 2.2 0.82 0.56 N/A 0.2556 0.3221 96.63 0.00 0.00 0.00 0.00 0.00 96.63 1230.11 0.09 512.55 0.24 0.00 0.00 1:15 2.2 0.82 0.56 N/A 0.2556 0.3221 96.63 0.00 0.00 0.00 0.00 0.00 96.63 1254.96 0.09 609.09 0.29 0.00 0.00 1:20 2 0.74 0.56 N/A 0.1812 0.2283 68.50 0.00 0.00 0.00 0.00 0.00 68.50 1279.82 0.09 677.50 0.32 0.00 0.00 1:25 2.6 0.97 0.56 N/A 0.4044 0.5097 152.90 0.00 0.00 0.00 0.00 0.00 152.90 1297.44 0.09 830.31 0.39 0.00 0.00 1:30 2.7 1.00 0.56 N/A 0.4416 0.5565 166.96 0.00 0.00 0.00 0.00 0.00 166.96 1336.78 0.09 997.18 0.47 0.00 0.00 1:35 2.4 0.89 0.56 N/A 0.3300 0.4159 124.76 0.00 0.00 0.00 0.00 0.00 124.76 1379.74 0.10 1121.85 0.53 0.00 0.00 1:40 2.7 1.00 0.56 N/A 0.4416 0.5565 166.96 0.00 0.00 0.00 0.00 0.00 166.96 1411.84 0.10 1288.72 0.61 0.00 0.00 1:45 3.3 1.23 0.56 N/A 0.6648 0.8379 251.36 0.00 0.00 0.00 0.00 0.00 251.36 1454.80 0.10 1539.98 0.73 0.00 0.00 1:50 3.1 1.15 0.56 N/A 0.5904 0.7441 223.23 0.00 0.00 0.00 0.00 0.00 223.23 1519.49 0.11 1763.10 0.83 0.00 0.00 1:55 2.9 1.08 0.56 N/A 0.5160 0.6503 195.10 0.00 0.00 0.00 0.00 0.00 195.10 1576.94 0.11 1958.09 0.92 0.00 0.00 2:00 3 1.12 0.56 N/A 0.5532 0.6972 209.16 0.00 0.00 0.00 0.00 0.00 209.16 1627.14 0.11 2167.13 1.02 0.00 0.00 2:05 3.1 1.15 0.56 N/A 0.5904 0.7441 223.23 0.00 0.00 0.00 0.00 0.00 223.23 1680.97 0.12 2390.25 1.13 0.00 0.00 2:10 4.2 1.56 0.56 N/A 0.9996 1.2599 377.96 0.00 0.00 0.00 0.00 0.00 377.96 1738.41 0.12 2768.08 1.31 0.00 0.00 2:15 5 1.86 0.56 N/A 1.2972 1.6350 490.49 0.00 0.00 0.00 0.00 0.00 490.49 1835.69 0.13 3258.44 1.54 0.00 0.00 2:20 3.5 1.30 0.56 N/A 0.7392 0.9316 279.49 0.00 0.00 0.00 0.00 0.00 279.49 1961.94 0.14 3537.80 1.67 0.00 0.00 2:25 6.8 2.53 0.56 N/A 1.9668 2.4789 743.68 0.00 0.00 0.00 0.00 0.00 743.68 2033.87 0.14 4281.34 2.02 0.00 0.00 2:30 7.3 2.72 0.56 N/A 2.1528 2.7134 814.01 0.00 0.00 0.00 0.00 0.00 814.01 2225.30 0.15 5095.19 2.41 0.00 0.00 2:35 8.2 3.05 0.56 N/A 2.4876 3.1354 940.61 0.00 0.00 0.00 0.00 0.00 940.61 2434.85 0.17 6035.63 2.85 0.00 0.00 2:40 5.9 2.19 0.56 N/A 1.6320 2.0569 617.08 0.00 0.00 0.00 0.00 0.00 617.08 2676.98 0.19 6652.53 3.14 0.00 0.00 2:45 2 0.74 0.56 N/A 0.1812 0.2283 68.50 0.00 0.00 0.00 0.00 0.00 68.50 2835.81 0.20 6720.83 3.17 0.00 0.00 2:50 1.8 0.67 0.56 N/A 0.1068 0.1346 40.37 0.00 0.00 0.00 0.00 0.00 40.37 2853.39 0.20 6761.00 3.19 0.00 0.00 2:55 1.8 0.67 0.56 N/A 0.1068 0.1346 40.37 0.00 0.00 0.00 0.00 0.00 40.37 2863.74 0.20 6801.17 3.21 0.00 0.00 3:00 0.6 0.22 0.56 0.20 0.0223 0.0281 8.44 0.00 0.00 0.00 0.00 0.00 8.44 2874.08 0.20 6809.41 3.22 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2876.20 0.20 6809.21 3.22 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2876.15 0.20 6809.01 3.22 0.00 0.00 3:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2876.10 0.20 6808.81 3.22 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2876.04 0.20 6808.61 3.22 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2875.99 0.20 6808.41 3.21 0.00 0.00 3:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2875.94 0.20 6808.21 3.21 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2875.89 0.20 6808.01 3.21 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2875.84 0.20 6807.81 3.21 0.00 0.00 Total volume (cf)6813.47 Total Overflow (cf)0.00
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6 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 0.5 0.23 0.56 0.20 0.0227 0.0287 8.60 0.00 0.00 0.00 0.00 0.00 8.60 1123.00 0.08 8.52 0.00 0.00 0.00 0:10 0.6 0.27 0.56 0.25 0.0273 0.0344 10.32 0.00 0.00 0.00 0.00 0.00 10.32 1125.19 0.08 18.76 0.01 0.00 0.00 0:15 0.6 0.27 0.56 0.25 0.0273 0.0344 10.32 0.00 0.00 0.00 0.00 0.00 10.32 1127.83 0.08 29.00 0.01 0.00 0.00 0:20 0.6 0.27 0.56 0.25 0.0273 0.0344 10.32 0.00 0.00 0.00 0.00 0.00 10.32 1130.47 0.08 39.24 0.02 0.00 0.00 0:25 0.6 0.27 0.56 0.25 0.0273 0.0344 10.32 0.00 0.00 0.00 0.00 0.00 10.32 1133.10 0.08 49.48 0.02 0.00 0.00 0:30 0.7 0.32 0.56 0.29 0.0318 0.0401 12.04 0.00 0.00 0.00 0.00 0.00 12.04 1135.74 0.08 61.44 0.03 0.00 0.00 0:35 0.7 0.32 0.56 0.29 0.0318 0.0401 12.04 0.00 0.00 0.00 0.00 0.00 12.04 1138.82 0.08 73.40 0.03 0.00 0.00 0:40 0.7 0.32 0.56 0.29 0.0318 0.0401 12.04 0.00 0.00 0.00 0.00 0.00 12.04 1141.90 0.08 85.36 0.04 0.00 0.00 0:45 0.7 0.32 0.56 0.29 0.0318 0.0401 12.04 0.00 0.00 0.00 0.00 0.00 12.04 1144.98 0.08 97.32 0.05 0.00 0.00 0:50 0.7 0.32 0.56 0.29 0.0318 0.0401 12.04 0.00 0.00 0.00 0.00 0.00 12.04 1148.06 0.08 109.27 0.05 0.00 0.00 0:55 0.7 0.32 0.56 0.29 0.0318 0.0401 12.04 0.00 0.00 0.00 0.00 0.00 12.04 1151.13 0.08 121.23 0.06 0.00 0.00 1:00 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1154.21 0.08 134.91 0.06 0.00 0.00 1:05 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1157.73 0.08 148.59 0.07 0.00 0.00 1:10 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1161.26 0.08 162.26 0.08 0.00 0.00 1:15 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1164.78 0.08 175.94 0.08 0.00 0.00 1:20 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1168.30 0.08 189.62 0.09 0.00 0.00 1:25 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1171.82 0.08 203.29 0.10 0.00 0.00 1:30 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1175.34 0.08 216.97 0.10 0.00 0.00 1:35 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1178.86 0.08 230.65 0.11 0.00 0.00 1:40 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1182.38 0.08 244.32 0.12 0.00 0.00 1:45 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1185.90 0.08 258.00 0.12 0.00 0.00 1:50 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1189.43 0.08 271.67 0.13 0.00 0.00 1:55 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1192.95 0.08 285.35 0.13 0.00 0.00 2:00 0.9 0.41 0.56 0.37 0.0409 0.0516 15.48 0.00 0.00 0.00 0.00 0.00 15.48 1196.47 0.08 300.74 0.14 0.00 0.00 2:05 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1200.43 0.08 314.41 0.15 0.00 0.00 2:10 0.9 0.41 0.56 0.37 0.0409 0.0516 15.48 0.00 0.00 0.00 0.00 0.00 15.48 1203.95 0.08 329.81 0.16 0.00 0.00 2:15 0.9 0.41 0.56 0.37 0.0409 0.0516 15.48 0.00 0.00 0.00 0.00 0.00 15.48 1207.91 0.08 345.20 0.16 0.00 0.00 2:20 0.9 0.41 0.56 0.37 0.0409 0.0516 15.48 0.00 0.00 0.00 0.00 0.00 15.48 1211.88 0.08 360.60 0.17 0.00 0.00 2:25 0.9 0.41 0.56 0.37 0.0409 0.0516 15.48 0.00 0.00 0.00 0.00 0.00 15.48 1215.84 0.08 375.99 0.18 0.00 0.00 2:30 0.9 0.41 0.56 0.37 0.0409 0.0516 15.48 0.00 0.00 0.00 0.00 0.00 15.48 1219.80 0.08 391.38 0.18 0.00 0.00 2:35 0.9 0.41 0.56 0.37 0.0409 0.0516 15.48 0.00 0.00 0.00 0.00 0.00 15.48 1223.77 0.08 406.77 0.19 0.00 0.00 2:40 0.9 0.41 0.56 0.37 0.0409 0.0516 15.48 0.00 0.00 0.00 0.00 0.00 15.48 1227.73 0.09 422.17 0.20 0.00 0.00 2:45 1 0.45 0.56 0.41 0.0455 0.0573 17.20 0.00 0.00 0.00 0.00 0.00 17.20 1231.69 0.09 439.28 0.21 0.00 0.00 2:50 1 0.45 0.56 0.41 0.0455 0.0573 17.20 0.00 0.00 0.00 0.00 0.00 17.20 1236.10 0.09 456.39 0.22 0.00 0.00 2:55 1 0.45 0.56 0.41 0.0455 0.0573 17.20 0.00 0.00 0.00 0.00 0.00 17.20 1240.50 0.09 473.50 0.22 0.00 0.00 3:00 1 0.45 0.56 0.41 0.0455 0.0573 17.20 0.00 0.00 0.00 0.00 0.00 17.20 1244.91 0.09 490.61 0.23 0.00 0.00 3:05 1 0.45 0.56 0.41 0.0455 0.0573 17.20 0.00 0.00 0.00 0.00 0.00 17.20 1249.32 0.09 507.72 0.24 0.00 0.00 3:10 1.1 0.50 0.56 0.45 0.0500 0.0631 18.92 0.00 0.00 0.00 0.00 0.00 18.92 1253.72 0.09 526.55 0.25 0.00 0.00 3:15 1.1 0.50 0.56 0.45 0.0500 0.0631 18.92 0.00 0.00 0.00 0.00 0.00 18.92 1258.57 0.09 545.38 0.26 0.00 0.00 3:20 1.1 0.50 0.56 0.45 0.0500 0.0631 18.92 0.00 0.00 0.00 0.00 0.00 18.92 1263.42 0.09 564.21 0.27 0.00 0.00 3:25 1.2 0.55 0.56 0.49 0.0546 0.0688 20.64 0.00 0.00 0.00 0.00 0.00 20.64 1268.27 0.09 584.76 0.28 0.00 0.00 3:30 1.3 0.59 0.56 0.53 0.0591 0.0745 22.36 0.00 0.00 0.00 0.00 0.00 22.36 1273.56 0.09 607.02 0.29 0.00 0.00 3:35 1.4 0.64 0.56 N/A 0.0739 0.0931 27.93 0.00 0.00 0.00 0.00 0.00 27.93 1279.29 0.09 634.87 0.30 0.00 0.00 3:40 1.4 0.64 0.56 N/A 0.0739 0.0931 27.93 0.00 0.00 0.00 0.00 0.00 27.93 1286.46 0.09 662.72 0.31 0.00 0.00 3:45 1.5 0.68 0.56 N/A 0.1194 0.1504 45.13 0.00 0.00 0.00 0.00 0.00 45.13 1293.63 0.09 707.76 0.33 0.00 0.00 3:50 1.5 0.68 0.56 N/A 0.1194 0.1504 45.13 0.00 0.00 0.00 0.00 0.00 45.13 1305.22 0.09 752.80 0.36 0.00 0.00 3:55 1.6 0.73 0.56 N/A 0.1648 0.2078 62.33 0.00 0.00 0.00 0.00 0.00 62.33 1316.82 0.09 815.04 0.38 0.00 0.00 4:00 1.6 0.73 0.56 N/A 0.1648 0.2078 62.33 0.00 0.00 0.00 0.00 0.00 62.33 1332.84 0.09 877.27 0.41 0.00 0.00 4:05 1.7 0.77 0.56 N/A 0.2103 0.2651 79.53 0.00 0.00 0.00 0.00 0.00 79.53 1348.87 0.09 956.70 0.45 0.00 0.00 4:10 1.8 0.82 0.56 N/A 0.2558 0.3224 96.72 0.00 0.00 0.00 0.00 0.00 96.72 1369.32 0.10 1053.33 0.50 0.00 0.00 4:15 1.9 0.86 0.56 N/A 0.3013 0.3797 113.92 0.00 0.00 0.00 0.00 0.00 113.92 1394.20 0.10 1167.15 0.55 0.00 0.00 400

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4:20 2 0.91 0.56 N/A 0.3468 0.4371 131.12 0.00 0.00 0.00 0.00 0.00 131.12 1423.50 0.10 1298.17 0.61 0.00 0.00 4:25 2.1 0.96 0.56 N/A 0.3922 0.4944 148.31 0.00 0.00 0.00 0.00 0.00 148.31 1457.24 0.10 1446.39 0.68 0.00 0.00 4:30 2.1 0.96 0.56 N/A 0.3922 0.4944 148.31 0.00 0.00 0.00 0.00 0.00 148.31 1495.40 0.10 1594.60 0.75 0.00 0.00 4:35 2.2 1.00 0.56 N/A 0.4377 0.5517 165.51 0.00 0.00 0.00 0.00 0.00 165.51 1533.56 0.11 1760.00 0.83 0.00 0.00 4:40 2.3 1.05 0.56 N/A 0.4832 0.6090 182.71 0.00 0.00 0.00 0.00 0.00 182.71 1576.14 0.11 1942.60 0.92 0.00 0.00 4:45 2.4 1.09 0.56 N/A 0.5287 0.6664 199.91 0.00 0.00 0.00 0.00 0.00 199.91 1623.16 0.11 2142.39 1.01 0.00 0.00 4:50 2.4 1.09 0.56 N/A 0.5287 0.6664 199.91 0.00 0.00 0.00 0.00 0.00 199.91 1674.60 0.12 2342.18 1.11 0.00 0.00 4:55 2.5 1.14 0.56 N/A 0.5742 0.7237 217.10 0.00 0.00 0.00 0.00 0.00 217.10 1726.03 0.12 2559.16 1.21 0.00 0.00 5:00 2.6 1.18 0.56 N/A 0.6196 0.7810 234.30 0.00 0.00 0.00 0.00 0.00 234.30 1781.90 0.12 2793.34 1.32 0.00 0.00 5:05 3.1 1.41 0.56 N/A 0.8470 1.0676 320.29 0.00 0.00 0.00 0.00 0.00 320.29 1842.19 0.13 3113.50 1.47 0.00 0.00 5:10 3.6 1.64 0.56 N/A 1.0744 1.3542 406.27 0.00 0.00 0.00 0.00 0.00 406.27 1924.62 0.13 3519.64 1.66 0.00 0.00 5:15 3.9 1.77 0.56 N/A 1.2109 1.5262 457.86 0.00 0.00 0.00 0.00 0.00 457.86 2029.19 0.14 3977.36 1.88 0.00 0.00 5:20 4.2 1.91 0.56 N/A 1.3473 1.6982 509.45 0.00 0.00 0.00 0.00 0.00 509.45 2147.04 0.15 4486.66 2.12 0.00 0.00 5:25 4.7 2.14 0.56 N/A 1.5747 1.9848 595.44 0.00 0.00 0.00 0.00 0.00 595.44 2278.17 0.16 5081.94 2.40 0.00 0.00 5:30 5.6 2.55 0.56 N/A 1.9840 2.5007 750.21 0.00 0.00 0.00 0.00 0.00 750.21 2431.43 0.17 5831.99 2.75 0.00 0.00 5:35 1.9 0.86 0.56 N/A 0.3013 0.3797 113.92 0.00 0.00 0.00 0.00 0.00 113.92 2624.55 0.18 5945.73 2.81 0.00 0.00 5:40 0.9 0.41 0.56 0.37 0.0409 0.0516 15.48 0.00 0.00 0.00 0.00 0.00 15.48 2653.83 0.18 5961.02 2.81 0.00 0.00 5:45 0.6 0.27 0.56 0.25 0.0273 0.0344 10.32 0.00 0.00 0.00 0.00 0.00 10.32 2657.77 0.18 5971.15 2.82 0.00 0.00 5:50 0.5 0.23 0.56 0.20 0.0227 0.0287 8.60 0.00 0.00 0.00 0.00 0.00 8.60 2660.38 0.18 5979.57 2.82 0.00 0.00 5:55 0.3 0.14 0.56 0.12 0.0136 0.0172 5.16 0.00 0.00 0.00 0.00 0.00 5.16 2662.54 0.18 5984.54 2.83 0.00 0.00 6:00 0.2 0.09 0.56 0.08 0.0091 0.0115 3.44 0.00 0.00 0.00 0.00 0.00 3.44 2663.82 0.18 5987.80 2.83 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2664.66 0.19 5987.61 2.83 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2664.61 0.19 5987.43 2.83 0.00 0.00 6:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2664.57 0.19 5987.24 2.83 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2664.52 0.19 5987.06 2.83 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2664.47 0.19 5986.87 2.83 0.00 0.00 6:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2664.42 0.19 5986.69 2.83 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2664.37 0.19 5986.50 2.83 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2664.33 0.19 5986.32 2.83 0.00 0.00 6:45 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2664.28 0.19 5986.13 2.83 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2664.23 0.19 5985.95 2.83 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2664.18 0.19 5985.76 2.83 0.00 0.00 7:00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2664.14 0.19 5985.58 2.83 0.00 0.00 Total volume (cf)5995.07 Total Overflow (cf)0.00
401

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24 Hour Storm in 15 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:15 0.2 0.04 0.99 0.04 0.0040 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 1123.00 0.23 4.35 0.00 0.00 0.00 0:30 0.3 0.06 0.98 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1124.12 0.23 10.99 0.01 0.00 0.00 0:45 0.3 0.06 0.97 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1125.83 0.23 17.63 0.01 0.00 0.00 1:00 0.4 0.08 0.95 0.07 0.0081 0.0102 9.17 0.00 0.00 0.00 0.00 0.00 9.17 1127.54 0.23 26.56 0.01 0.00 0.00 1:15 0.3 0.06 0.94 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1129.84 0.24 33.20 0.02 0.00 0.00 1:30 0.3 0.06 0.93 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1131.55 0.24 39.84 0.02 0.00 0.00 1:45 0.3 0.06 0.92 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1133.26 0.24 46.48 0.02 0.00 0.00 2:00 0.4 0.08 0.91 0.07 0.0081 0.0102 9.17 0.00 0.00 0.00 0.00 0.00 9.17 1134.97 0.24 55.40 0.03 0.00 0.00 2:15 0.4 0.08 0.90 0.07 0.0081 0.0102 9.17 0.00 0.00 0.00 0.00 0.00 9.17 1137.26 0.24 64.33 0.03 0.00 0.00 2:30 0.4 0.08 0.89 0.07 0.0081 0.0102 9.17 0.00 0.00 0.00 0.00 0.00 9.17 1139.56 0.24 73.26 0.03 0.00 0.00 2:45 0.5 0.10 0.88 0.09 0.0101 0.0127 11.46 0.00 0.00 0.00 0.00 0.00 11.46 1141.86 0.24 84.48 0.04 0.00 0.00 3:00 0.5 0.10 0.87 0.09 0.0101 0.0127 11.46 0.00 0.00 0.00 0.00 0.00 11.46 1144.75 0.24 95.70 0.05 0.00 0.00 3:15 0.5 0.10 0.85 0.09 0.0101 0.0127 11.46 0.00 0.00 0.00 0.00 0.00 11.46 1147.64 0.24 106.92 0.05 0.00 0.00 3:30 0.5 0.10 0.84 0.09 0.0101 0.0127 11.46 0.00 0.00 0.00 0.00 0.00 11.46 1150.53 0.24 118.14 0.06 0.00 0.00 3:45 0.5 0.10 0.83 0.09 0.0101 0.0127 11.46 0.00 0.00 0.00 0.00 0.00 11.46 1153.42 0.24 129.35 0.06 0.00 0.00 4:00 0.6 0.12 0.82 0.11 0.0121 0.0153 13.75 0.00 0.00 0.00 0.00 0.00 13.75 1156.30 0.24 142.86 0.07 0.00 0.00 4:15 0.6 0.12 0.81 0.11 0.0121 0.0153 13.75 0.00 0.00 0.00 0.00 0.00 13.75 1159.78 0.24 156.37 0.07 0.00 0.00 4:30 0.7 0.14 0.80 0.13 0.0141 0.0178 16.04 0.00 0.00 0.00 0.00 0.00 16.04 1163.26 0.24 172.16 0.08 0.00 0.00 4:45 0.7 0.14 0.79 0.13 0.0141 0.0178 16.04 0.00 0.00 0.00 0.00 0.00 16.04 1167.33 0.24 187.96 0.09 0.00 0.00 5:00 0.8 0.16 0.78 0.15 0.0162 0.0204 18.33 0.00 0.00 0.00 0.00 0.00 18.33 1171.39 0.24 206.05 0.10 0.00 0.00 5:15 0.6 0.12 0.77 0.11 0.0121 0.0153 13.75 0.00 0.00 0.00 0.00 0.00 13.75 1176.05 0.25 219.55 0.10 0.00 0.00 5:30 0.7 0.14 0.76 0.13 0.0141 0.0178 16.04 0.00 0.00 0.00 0.00 0.00 16.04 1179.53 0.25 235.35 0.11 0.00 0.00 5:45 0.8 0.16 0.75 0.15 0.0162 0.0204 18.33 0.00 0.00 0.00 0.00 0.00 18.33 1183.59 0.25 253.43 0.12 0.00 0.00 6:00 0.8 0.16 0.74 0.15 0.0162 0.0204 18.33 0.00 0.00 0.00 0.00 0.00 18.33 1188.25 0.25 271.52 0.13 0.00 0.00 6:15 0.9 0.18 0.73 0.16 0.0182 0.0229 20.62 0.00 0.00 0.00 0.00 0.00 20.62 1192.91 0.25 291.89 0.14 0.00 0.00 6:30 0.9 0.18 0.72 0.16 0.0182 0.0229 20.62 0.00 0.00 0.00 0.00 0.00 20.62 1198.15 0.25 312.26 0.15 0.00 0.00 6:45 1 0.20 0.71 0.18 0.0202 0.0255 22.91 0.00 0.00 0.00 0.00 0.00 22.91 1203.40 0.25 334.93 0.16 0.00 0.00 7:00 1 0.20 0.70 0.18 0.0202 0.0255 22.91 0.00 0.00 0.00 0.00 0.00 22.91 1209.23 0.25 357.59 0.17 0.00 0.00 7:15 1 0.20 0.69 0.18 0.0202 0.0255 22.91 0.00 0.00 0.00 0.00 0.00 22.91 1215.07 0.25 380.25 0.18 0.00 0.00 7:30 1.1 0.22 0.68 0.20 0.0222 0.0280 25.21 0.00 0.00 0.00 0.00 0.00 25.21 1220.90 0.25 405.20 0.19 0.00 0.00 7:45 1.2 0.24 0.67 0.22 0.0242 0.0306 27.50 0.00 0.00 0.00 0.00 0.00 27.50 1227.33 0.26 432.44 0.20 0.00 0.00 8:00 1.3 0.26 0.66 0.24 0.0263 0.0331 29.79 0.00 0.00 0.00 0.00 0.00 29.79 1234.34 0.26 461.98 0.22 0.00 0.00 8:15 1.5 0.30 0.66 0.27 0.0303 0.0382 34.37 0.00 0.00 0.00 0.00 0.00 34.37 1241.94 0.26 496.09 0.23 0.00 0.00 8:30 1.5 0.30 0.65 0.27 0.0303 0.0382 34.37 0.00 0.00 0.00 0.00 0.00 34.37 1250.73 0.26 530.20 0.25 0.00 0.00 8:45 1.6 0.32 0.64 0.29 0.0323 0.0407 36.66 0.00 0.00 0.00 0.00 0.00 36.66 1259.51 0.26 566.60 0.27 0.00 0.00 9:00 1.7 0.34 0.63 0.31 0.0343 0.0433 38.95 0.00 0.00 0.00 0.00 0.00 38.95 1268.88 0.26 605.29 0.29 0.00 0.00 9:15 1.9 0.38 0.62 0.35 0.0384 0.0484 43.54 0.00 0.00 0.00 0.00 0.00 43.54 1278.84 0.27 648.56 0.31 0.00 0.00 9:30 2 0.40 0.61 0.36 0.0404 0.0509 45.83 0.00 0.00 0.00 0.00 0.00 45.83 1289.98 0.27 694.12 0.33 0.00 0.00 9:45 2.1 0.42 0.60 0.38 0.0424 0.0535 48.12 0.00 0.00 0.00 0.00 0.00 48.12 1301.71 0.27 741.97 0.35 0.00 0.00 10:00 2.2 0.44 0.59 0.40 0.0444 0.0560 50.41 0.00 0.00 0.00 0.00 0.00 50.41 1314.03 0.27 792.11 0.37 0.00 0.00 10:15 1.5 0.30 0.58 0.27 0.0303 0.0382 34.37 0.00 0.00 0.00 0.00 0.00 34.37 1326.94 0.28 826.20 0.39 0.00 0.00 10:30 1.5 0.30 0.58 0.27 0.0303 0.0382 34.37 0.00 0.00 0.00 0.00 0.00 34.37 1335.72 0.28 860.30 0.41 0.00 0.00 10:45 2 0.40 0.57 0.36 0.0404 0.0509 45.83 0.00 0.00 0.00 0.00 0.00 45.83 1344.50 0.28 905.84 0.43 0.00 0.00 11:00 2 0.40 0.56 0.36 0.0404 0.0509 45.83 0.00 0.00 0.00 0.00 0.00 45.83 1356.23 0.28 951.39 0.45 0.00 0.00 11:15 1.9 0.38 0.55 0.35 0.0384 0.0484 43.54 0.00 0.00 0.00 0.00 0.00 43.54 1367.95 0.28 994.64 0.47 0.00 0.00 11:30 1.9 0.38 0.54 0.35 0.0384 0.0484 43.54 0.00 0.00 0.00 0.00 0.00 43.54 1379.09 0.29 1037.89 0.49 0.00 0.00 11:45 1.7 0.34 0.53 0.31 0.0343 0.0433 38.95 0.00 0.00 0.00 0.00 0.00 38.95 1390.22 0.29 1076.56 0.51 0.00 0.00 12:00 1.8 0.36 0.53 0.33 0.0364 0.0458 41.25 0.00 0.00 0.00 0.00 0.00 41.25 1400.18 0.29 1117.51 0.53 0.00 0.00 12:15 2.5 0.51 0.52 0.45 0.0505 0.0637 57.29 0.00 0.00 0.00 0.00 0.00 57.29 1410.72 0.29 1174.50 0.55 0.00 0.00 12:30 2.6 0.53 0.51 0.47 0.0525 0.0662 59.58 0.00 0.00 0.00 0.00 0.00 59.58 1425.40 0.30 1233.78 0.58 0.00 0.00 12:45 2.8 0.57 0.50 N/A 0.0622 0.0784 70.59 0.00 0.00 0.00 0.00 0.00 70.59 1440.66 0.30 1304.08 0.62 0.00 0.00 402

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13:00 2.9 0.59 0.50 N/A 0.0900 0.1135 102.13 0.00 0.00 0.00 0.00 0.00 102.13 1458.76 0.30 1405.90 0.66 0.00 0.00 13:15 3.4 0.69 0.49 N/A 0.1985 0.2502 225.21 0.00 0.00 0.00 0.00 0.00 225.21 1484.97 0.31 1630.80 0.77 0.00 0.00 13:30 3.4 0.69 0.48 N/A 0.2059 0.2596 233.61 0.00 0.00 0.00 0.00 0.00 233.61 1542.88 0.32 1864.09 0.88 0.00 0.00 13:45 2.3 0.46 0.47 0.42 0.0465 0.0586 52.70 0.00 0.00 0.00 0.00 0.00 52.70 1602.94 0.33 1916.46 0.90 0.00 0.00 14:00 2.3 0.46 0.47 0.42 0.0465 0.0586 52.70 0.00 0.00 0.00 0.00 0.00 52.70 1616.43 0.34 1968.83 0.93 0.00 0.00 14:15 2.7 0.55 0.46 N/A 0.0862 0.1086 97.76 0.00 0.00 0.00 0.00 0.00 97.76 1629.91 0.34 2066.25 0.98 0.00 0.00 14:30 2.6 0.53 0.45 N/A 0.0730 0.0920 82.81 0.00 0.00 0.00 0.00 0.00 82.81 1654.99 0.34 2148.71 1.01 0.00 0.00 14:45 2.6 0.53 0.45 N/A 0.0799 0.1007 90.65 0.00 0.00 0.00 0.00 0.00 90.65 1676.22 0.35 2239.02 1.06 0.00 0.00 15:00 2.5 0.51 0.44 N/A 0.0665 0.0839 75.47 0.00 0.00 0.00 0.00 0.00 75.47 1699.47 0.35 2314.13 1.09 0.00 0.00 15:15 2.4 0.48 0.43 N/A 0.0530 0.0668 60.16 0.00 0.00 0.00 0.00 0.00 60.16 1718.81 0.36 2373.93 1.12 0.00 0.00 15:30 2.3 0.46 0.43 0.42 0.0465 0.0586 52.70 0.00 0.00 0.00 0.00 0.00 52.70 1734.21 0.36 2426.28 1.15 0.00 0.00 15:45 1.9 0.38 0.42 0.35 0.0384 0.0484 43.54 0.00 0.00 0.00 0.00 0.00 43.54 1747.69 0.36 2469.45 1.17 0.00 0.00 16:00 1.9 0.38 0.41 0.35 0.0384 0.0484 43.54 0.00 0.00 0.00 0.00 0.00 43.54 1758.80 0.37 2512.62 1.19 0.00 0.00 16:15 0.4 0.08 0.41 0.07 0.0081 0.0102 9.17 0.00 0.00 0.00 0.00 0.00 9.17 1769.92 0.37 2521.42 1.19 0.00 0.00 16:30 0.4 0.08 0.40 0.07 0.0081 0.0102 9.17 0.00 0.00 0.00 0.00 0.00 9.17 1772.18 0.37 2530.21 1.19 0.00 0.00 16:45 0.3 0.06 0.39 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1774.45 0.37 2536.72 1.20 0.00 0.00 17:00 0.3 0.06 0.39 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1776.12 0.37 2543.22 1.20 0.00 0.00 17:15 0.5 0.10 0.38 0.09 0.0101 0.0127 11.46 0.00 0.00 0.00 0.00 0.00 11.46 1777.80 0.37 2554.31 1.21 0.00 0.00 17:30 0.5 0.10 0.38 0.09 0.0101 0.0127 11.46 0.00 0.00 0.00 0.00 0.00 11.46 1780.65 0.37 2565.40 1.21 0.00 0.00 17:45 0.5 0.10 0.37 0.09 0.0101 0.0127 11.46 0.00 0.00 0.00 0.00 0.00 11.46 1783.51 0.37 2576.48 1.22 0.00 0.00 18:00 0.4 0.08 0.37 0.07 0.0081 0.0102 9.17 0.00 0.00 0.00 0.00 0.00 9.17 1786.36 0.37 2585.28 1.22 0.00 0.00 18:15 0.4 0.08 0.36 0.07 0.0081 0.0102 9.17 0.00 0.00 0.00 0.00 0.00 9.17 1788.62 0.37 2594.07 1.22 0.00 0.00 18:30 0.4 0.08 0.35 0.07 0.0081 0.0102 9.17 0.00 0.00 0.00 0.00 0.00 9.17 1790.89 0.37 2602.86 1.23 0.00 0.00 18:45 0.3 0.06 0.35 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1793.15 0.37 2609.36 1.23 0.00 0.00 19:00 0.2 0.04 0.34 0.04 0.0040 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 1794.82 0.37 2613.57 1.23 0.00 0.00 19:15 0.3 0.06 0.34 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1795.91 0.37 2620.07 1.24 0.00 0.00 19:30 0.4 0.08 0.34 0.07 0.0081 0.0102 9.17 0.00 0.00 0.00 0.00 0.00 9.17 1797.58 0.37 2628.86 1.24 0.00 0.00 19:45 0.3 0.06 0.33 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1799.85 0.37 2635.36 1.24 0.00 0.00 20:00 0.2 0.04 0.33 0.04 0.0040 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 1801.52 0.38 2639.57 1.25 0.00 0.00 20:15 0.3 0.06 0.32 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1802.60 0.38 2646.07 1.25 0.00 0.00 20:30 0.3 0.06 0.32 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1804.28 0.38 2652.57 1.25 0.00 0.00 20:45 0.3 0.06 0.31 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1805.95 0.38 2659.06 1.26 0.00 0.00 21:00 0.2 0.04 0.31 0.04 0.0040 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 1807.62 0.38 2663.27 1.26 0.00 0.00 21:15 0.3 0.06 0.31 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1808.70 0.38 2669.77 1.26 0.00 0.00 21:30 0.2 0.04 0.30 0.04 0.0040 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 1810.38 0.38 2673.97 1.26 0.00 0.00 21:45 0.3 0.06 0.30 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1811.46 0.38 2680.47 1.27 0.00 0.00 22:00 0.2 0.04 0.30 0.04 0.0040 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 1813.13 0.38 2684.68 1.27 0.00 0.00 22:15 0.3 0.06 0.29 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1814.22 0.38 2691.17 1.27 0.00 0.00 22:30 0.2 0.04 0.29 0.04 0.0040 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 1815.89 0.38 2695.38 1.27 0.00 0.00 22:45 0.2 0.04 0.29 0.04 0.0040 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 1816.97 0.38 2699.58 1.27 0.00 0.00 23:00 0.2 0.04 0.29 0.04 0.0040 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 1818.05 0.38 2703.79 1.28 0.00 0.00 23:15 0.2 0.04 0.28 0.04 0.0040 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 1819.14 0.38 2707.99 1.28 0.00 0.00 23:30 0.2 0.04 0.28 0.04 0.0040 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 1820.22 0.38 2712.19 1.28 0.00 0.00 23:45 0.2 0.04 0.28 0.04 0.0040 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 1821.30 0.38 2716.40 1.28 0.00 0.00 24:00 0.2 0.04 0.28 0.04 0.0040 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 1822.38 0.38 2720.60 1.28 0.00 0.00 0 0.00 0.28 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1823.46 0.38 2720.22 1.28 0.00 0.00 Total volume (cf)2750.10 Total Overflow (cf)0.00
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HYDROLOGY CALCULATIONS - program updated 4-14-22 LC
Using the RCFC&WCD Short Cut Unit Hydrograph Method
Area Designations Area 1 VERSION 2 Area=1.16ac+0.09ac typ street frontage=1.25ac 5/7/2024 LOT 7
Drainage Area (ac.)1.2500 JOB NUMBER 22106
Unit time (minutes)5 5 5 15
100 Year Storm Duration (hrs)1 3 6 24
Total Precipitation (Plates D-4.4,E-5.2, 5.4, 5.6)(in.)2.41 3.10 3.79 5.05 from NOAA interactive website Soils Group A
AMC index II Runoff Number (plate E-6.1)32
Plate E-6.2 Pervious Area Loss Rate (Fp)(in/hr)0.74 (AMC II) Percentage of Impervious Cover (Ai)(%) (plate E-6.3)26.6 20% per the RCFC Hydrology Manual 1AC LOT-PLATE D 5.6 AND 0.09AC TYPICAL STREET FRONTAGE Weighted Average Loss Rate (F=Fp(1-.9Ai))(in./hr.)0.56 (used for 1, 3, and 6 hour storm, the 24 hour storm uses variable maximum loss rate per plate E-1.1 (3 of 6)) Low Loss Rate Percent (%) 90
Retention Basin Percolation Rate (in/hr)0.01 (also used for drywell percolation rate) Percolation is taken incrementally.

Drywell design factors Upper sec. (ft.)=0.001 Lower sec. (ft.)=0.001 Ring diam. (ft.) =0.001 Drywell lower max. (cf)=0.00 Upper max.(cf)=0.00 Gravel bed width around drywell=0.001 Drywell total(cf)=0.00 Ret. Basin design (area, depth) Top =3304 s.f.Bot. =1123 s.f.Max. Depth (d)=4 Max. storage=8470.98 (d/3)*(bottom+top+(bottom*top)^0.50) Formulas vol=(h/3)*(bottom+top+(bottom*top)^0.50) area=bottom+(h/d)*(top-bottom)h=(vol*3)/(bottom+top+(bottom*top)^0.5)(values must be non-zero or error occurs) Outside input from:N/A 3.25
1 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 3.7 1.0700 0.5628 N/A 0.5072 0.6393 191.78 0.00 0.00 0.00 0.00 0.00 191.78 1123.00 0.08 191.71 0.09 0.00 0.00 0:10 4.8 1.3882 0.5628 N/A 0.8253 1.0402 312.07 0.00 0.00 0.00 0.00 0.00 312.07 1172.36 0.08 503.70 0.24 0.00 0.00 0:15 5.1 1.4749 0.5628 N/A 0.9121 1.1496 344.88 0.00 0.00 0.00 0.00 0.00 344.88 1252.69 0.09 848.49 0.40 0.00 0.00 0:20 4.9 1.4171 0.5628 N/A 0.8542 1.0767 323.01 0.00 0.00 0.00 0.00 0.00 323.01 1341.46 0.09 1171.40 0.55 0.00 0.00 0:25 6.6 1.9087 0.5628 N/A 1.3459 1.6964 508.91 0.00 0.00 0.00 0.00 0.00 508.91 1424.60 0.10 1680.21 0.79 0.00 0.00 0:30 7.3 2.1112 0.5628 N/A 1.5483 1.9515 585.46 0.00 0.00 0.00 0.00 0.00 585.46 1555.60 0.11 2265.56 1.07 0.00 0.00 0:35 8.4 2.4293 0.5628 N/A 1.8664 2.3525 705.75 0.00 0.00 0.00 0.00 0.00 705.75 1706.31 0.12 2971.19 1.40 0.00 0.00 0:40 9 2.6028 0.5628 N/A 2.0400 2.5712 771.36 0.00 0.00 0.00 0.00 0.00 771.36 1887.98 0.13 3742.42 1.77 0.00 0.00 0:45 12.3 3.5572 0.5628 N/A 2.9943 3.7741 1132.23 0.00 0.00 0.00 0.00 0.00 1132.23 2086.55 0.14 4874.50 2.30 0.00 0.00 0:50 17.6 5.0899 0.5628 N/A 4.5271 5.7060 1711.80 0.00 0.00 0.00 0.00 0.00 1711.80 2378.02 0.17 6586.13 3.11 0.00 0.00 0:55 16.1 4.6561 0.5628 N/A 4.0933 5.1592 1547.77 0.00 0.00 0.00 0.00 0.00 1547.77 2818.71 0.20 8133.71 3.84 0.00 0.00 1:00 4.2 1.2146 0.5628 N/A 0.6518 0.8215 246.46 0.00 0.00 0.00 0.00 0.00 246.46 3217.16 0.22 8379.95 3.96 0.00 0.00 MAX DEPTH 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3280.56 0.23 8379.72 3.96 0.00 0.00 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3280.50 0.23 8379.49 3.96 0.00 0.00 1:15 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3280.44 0.23 8379.26 3.96 0.00 0.00 Total volume (cf)8381.47 Total Overflow (cf)0.00
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3 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 1.3 0.48 0.56 0.44 0.0484 0.0610 18.29 0.00 0.00 0.00 0.00 0.00 18.29 1123.00 0.08 18.21 0.01 0.00 0.00 0:10 1.3 0.48 0.56 0.44 0.0484 0.0610 18.29 0.00 0.00 0.00 0.00 0.00 18.29 1127.69 0.08 36.42 0.02 0.00 0.00 0:15 1.1 0.41 0.56 0.37 0.0409 0.0516 15.47 0.00 0.00 0.00 0.00 0.00 15.47 1132.38 0.08 51.81 0.02 0.00 0.00 0:20 1.5 0.56 0.56 0.50 0.0558 0.0703 21.10 0.00 0.00 0.00 0.00 0.00 21.10 1136.34 0.08 72.83 0.03 0.00 0.00 0:25 1.5 0.56 0.56 0.50 0.0558 0.0703 21.10 0.00 0.00 0.00 0.00 0.00 21.10 1141.75 0.08 93.85 0.04 0.00 0.00 0:30 1.8 0.67 0.56 N/A 0.1068 0.1346 40.37 0.00 0.00 0.00 0.00 0.00 40.37 1147.16 0.08 134.14 0.06 0.00 0.00 0:35 1.5 0.56 0.56 0.50 0.0558 0.0703 21.10 0.00 0.00 0.00 0.00 0.00 21.10 1157.54 0.08 155.16 0.07 0.00 0.00 0:40 1.8 0.67 0.56 N/A 0.1068 0.1346 40.37 0.00 0.00 0.00 0.00 0.00 40.37 1162.95 0.08 195.44 0.09 0.00 0.00 0:45 1.8 0.67 0.56 N/A 0.1068 0.1346 40.37 0.00 0.00 0.00 0.00 0.00 40.37 1173.32 0.08 235.73 0.11 0.00 0.00 0:50 1.5 0.56 0.56 0.50 0.0558 0.0703 21.10 0.00 0.00 0.00 0.00 0.00 21.10 1183.69 0.08 256.75 0.12 0.00 0.00 0:55 1.6 0.60 0.56 0.54 0.0595 0.0750 22.51 0.00 0.00 0.00 0.00 0.00 22.51 1189.10 0.08 279.17 0.13 0.00 0.00 1:00 1.8 0.67 0.56 N/A 0.1068 0.1346 40.37 0.00 0.00 0.00 0.00 0.00 40.37 1194.88 0.08 319.45 0.15 0.00 0.00 1:05 2.2 0.82 0.56 N/A 0.2556 0.3221 96.63 0.00 0.00 0.00 0.00 0.00 96.63 1205.25 0.08 416.00 0.20 0.00 0.00 1:10 2.2 0.82 0.56 N/A 0.2556 0.3221 96.63 0.00 0.00 0.00 0.00 0.00 96.63 1230.11 0.09 512.55 0.24 0.00 0.00 1:15 2.2 0.82 0.56 N/A 0.2556 0.3221 96.63 0.00 0.00 0.00 0.00 0.00 96.63 1254.96 0.09 609.09 0.29 0.00 0.00 1:20 2 0.74 0.56 N/A 0.1812 0.2283 68.50 0.00 0.00 0.00 0.00 0.00 68.50 1279.82 0.09 677.50 0.32 0.00 0.00 1:25 2.6 0.97 0.56 N/A 0.4044 0.5097 152.90 0.00 0.00 0.00 0.00 0.00 152.90 1297.44 0.09 830.31 0.39 0.00 0.00 1:30 2.7 1.00 0.56 N/A 0.4416 0.5565 166.96 0.00 0.00 0.00 0.00 0.00 166.96 1336.78 0.09 997.18 0.47 0.00 0.00 1:35 2.4 0.89 0.56 N/A 0.3300 0.4159 124.76 0.00 0.00 0.00 0.00 0.00 124.76 1379.74 0.10 1121.85 0.53 0.00 0.00 1:40 2.7 1.00 0.56 N/A 0.4416 0.5565 166.96 0.00 0.00 0.00 0.00 0.00 166.96 1411.84 0.10 1288.72 0.61 0.00 0.00 1:45 3.3 1.23 0.56 N/A 0.6648 0.8379 251.36 0.00 0.00 0.00 0.00 0.00 251.36 1454.80 0.10 1539.98 0.73 0.00 0.00 1:50 3.1 1.15 0.56 N/A 0.5904 0.7441 223.23 0.00 0.00 0.00 0.00 0.00 223.23 1519.49 0.11 1763.10 0.83 0.00 0.00 1:55 2.9 1.08 0.56 N/A 0.5160 0.6503 195.10 0.00 0.00 0.00 0.00 0.00 195.10 1576.94 0.11 1958.09 0.92 0.00 0.00 2:00 3 1.12 0.56 N/A 0.5532 0.6972 209.16 0.00 0.00 0.00 0.00 0.00 209.16 1627.14 0.11 2167.13 1.02 0.00 0.00 2:05 3.1 1.15 0.56 N/A 0.5904 0.7441 223.23 0.00 0.00 0.00 0.00 0.00 223.23 1680.97 0.12 2390.25 1.13 0.00 0.00 2:10 4.2 1.56 0.56 N/A 0.9996 1.2599 377.96 0.00 0.00 0.00 0.00 0.00 377.96 1738.41 0.12 2768.08 1.31 0.00 0.00 2:15 5 1.86 0.56 N/A 1.2972 1.6350 490.49 0.00 0.00 0.00 0.00 0.00 490.49 1835.69 0.13 3258.44 1.54 0.00 0.00 2:20 3.5 1.30 0.56 N/A 0.7392 0.9316 279.49 0.00 0.00 0.00 0.00 0.00 279.49 1961.94 0.14 3537.80 1.67 0.00 0.00 2:25 6.8 2.53 0.56 N/A 1.9668 2.4789 743.68 0.00 0.00 0.00 0.00 0.00 743.68 2033.87 0.14 4281.34 2.02 0.00 0.00 2:30 7.3 2.72 0.56 N/A 2.1528 2.7134 814.01 0.00 0.00 0.00 0.00 0.00 814.01 2225.30 0.15 5095.19 2.41 0.00 0.00 2:35 8.2 3.05 0.56 N/A 2.4876 3.1354 940.61 0.00 0.00 0.00 0.00 0.00 940.61 2434.85 0.17 6035.63 2.85 0.00 0.00 2:40 5.9 2.19 0.56 N/A 1.6320 2.0569 617.08 0.00 0.00 0.00 0.00 0.00 617.08 2676.98 0.19 6652.53 3.14 0.00 0.00 2:45 2 0.74 0.56 N/A 0.1812 0.2283 68.50 0.00 0.00 0.00 0.00 0.00 68.50 2835.81 0.20 6720.83 3.17 0.00 0.00 2:50 1.8 0.67 0.56 N/A 0.1068 0.1346 40.37 0.00 0.00 0.00 0.00 0.00 40.37 2853.39 0.20 6761.00 3.19 0.00 0.00 2:55 1.8 0.67 0.56 N/A 0.1068 0.1346 40.37 0.00 0.00 0.00 0.00 0.00 40.37 2863.74 0.20 6801.17 3.21 0.00 0.00 3:00 0.6 0.22 0.56 0.20 0.0223 0.0281 8.44 0.00 0.00 0.00 0.00 0.00 8.44 2874.08 0.20 6809.41 3.22 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2876.20 0.20 6809.21 3.22 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2876.15 0.20 6809.01 3.22 0.00 0.00 3:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2876.10 0.20 6808.81 3.22 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2876.04 0.20 6808.61 3.22 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2875.99 0.20 6808.41 3.21 0.00 0.00 3:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2875.94 0.20 6808.21 3.21 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2875.89 0.20 6808.01 3.21 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2875.84 0.20 6807.81 3.21 0.00 0.00 Total volume (cf)6813.47 Total Overflow (cf)0.00
405

3 of 6
6 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 0.5 0.23 0.56 0.20 0.0227 0.0287 8.60 0.00 0.00 0.00 0.00 0.00 8.60 1123.00 0.08 8.52 0.00 0.00 0.00 0:10 0.6 0.27 0.56 0.25 0.0273 0.0344 10.32 0.00 0.00 0.00 0.00 0.00 10.32 1125.19 0.08 18.76 0.01 0.00 0.00 0:15 0.6 0.27 0.56 0.25 0.0273 0.0344 10.32 0.00 0.00 0.00 0.00 0.00 10.32 1127.83 0.08 29.00 0.01 0.00 0.00 0:20 0.6 0.27 0.56 0.25 0.0273 0.0344 10.32 0.00 0.00 0.00 0.00 0.00 10.32 1130.47 0.08 39.24 0.02 0.00 0.00 0:25 0.6 0.27 0.56 0.25 0.0273 0.0344 10.32 0.00 0.00 0.00 0.00 0.00 10.32 1133.10 0.08 49.48 0.02 0.00 0.00 0:30 0.7 0.32 0.56 0.29 0.0318 0.0401 12.04 0.00 0.00 0.00 0.00 0.00 12.04 1135.74 0.08 61.44 0.03 0.00 0.00 0:35 0.7 0.32 0.56 0.29 0.0318 0.0401 12.04 0.00 0.00 0.00 0.00 0.00 12.04 1138.82 0.08 73.40 0.03 0.00 0.00 0:40 0.7 0.32 0.56 0.29 0.0318 0.0401 12.04 0.00 0.00 0.00 0.00 0.00 12.04 1141.90 0.08 85.36 0.04 0.00 0.00 0:45 0.7 0.32 0.56 0.29 0.0318 0.0401 12.04 0.00 0.00 0.00 0.00 0.00 12.04 1144.98 0.08 97.32 0.05 0.00 0.00 0:50 0.7 0.32 0.56 0.29 0.0318 0.0401 12.04 0.00 0.00 0.00 0.00 0.00 12.04 1148.06 0.08 109.27 0.05 0.00 0.00 0:55 0.7 0.32 0.56 0.29 0.0318 0.0401 12.04 0.00 0.00 0.00 0.00 0.00 12.04 1151.13 0.08 121.23 0.06 0.00 0.00 1:00 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1154.21 0.08 134.91 0.06 0.00 0.00 1:05 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1157.73 0.08 148.59 0.07 0.00 0.00 1:10 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1161.26 0.08 162.26 0.08 0.00 0.00 1:15 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1164.78 0.08 175.94 0.08 0.00 0.00 1:20 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1168.30 0.08 189.62 0.09 0.00 0.00 1:25 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1171.82 0.08 203.29 0.10 0.00 0.00 1:30 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1175.34 0.08 216.97 0.10 0.00 0.00 1:35 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1178.86 0.08 230.65 0.11 0.00 0.00 1:40 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1182.38 0.08 244.32 0.12 0.00 0.00 1:45 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1185.90 0.08 258.00 0.12 0.00 0.00 1:50 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1189.43 0.08 271.67 0.13 0.00 0.00 1:55 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1192.95 0.08 285.35 0.13 0.00 0.00 2:00 0.9 0.41 0.56 0.37 0.0409 0.0516 15.48 0.00 0.00 0.00 0.00 0.00 15.48 1196.47 0.08 300.74 0.14 0.00 0.00 2:05 0.8 0.36 0.56 0.33 0.0364 0.0459 13.76 0.00 0.00 0.00 0.00 0.00 13.76 1200.43 0.08 314.41 0.15 0.00 0.00 2:10 0.9 0.41 0.56 0.37 0.0409 0.0516 15.48 0.00 0.00 0.00 0.00 0.00 15.48 1203.95 0.08 329.81 0.16 0.00 0.00 2:15 0.9 0.41 0.56 0.37 0.0409 0.0516 15.48 0.00 0.00 0.00 0.00 0.00 15.48 1207.91 0.08 345.20 0.16 0.00 0.00 2:20 0.9 0.41 0.56 0.37 0.0409 0.0516 15.48 0.00 0.00 0.00 0.00 0.00 15.48 1211.88 0.08 360.60 0.17 0.00 0.00 2:25 0.9 0.41 0.56 0.37 0.0409 0.0516 15.48 0.00 0.00 0.00 0.00 0.00 15.48 1215.84 0.08 375.99 0.18 0.00 0.00 2:30 0.9 0.41 0.56 0.37 0.0409 0.0516 15.48 0.00 0.00 0.00 0.00 0.00 15.48 1219.80 0.08 391.38 0.18 0.00 0.00 2:35 0.9 0.41 0.56 0.37 0.0409 0.0516 15.48 0.00 0.00 0.00 0.00 0.00 15.48 1223.77 0.08 406.77 0.19 0.00 0.00 2:40 0.9 0.41 0.56 0.37 0.0409 0.0516 15.48 0.00 0.00 0.00 0.00 0.00 15.48 1227.73 0.09 422.17 0.20 0.00 0.00 2:45 1 0.45 0.56 0.41 0.0455 0.0573 17.20 0.00 0.00 0.00 0.00 0.00 17.20 1231.69 0.09 439.28 0.21 0.00 0.00 2:50 1 0.45 0.56 0.41 0.0455 0.0573 17.20 0.00 0.00 0.00 0.00 0.00 17.20 1236.10 0.09 456.39 0.22 0.00 0.00 2:55 1 0.45 0.56 0.41 0.0455 0.0573 17.20 0.00 0.00 0.00 0.00 0.00 17.20 1240.50 0.09 473.50 0.22 0.00 0.00 3:00 1 0.45 0.56 0.41 0.0455 0.0573 17.20 0.00 0.00 0.00 0.00 0.00 17.20 1244.91 0.09 490.61 0.23 0.00 0.00 3:05 1 0.45 0.56 0.41 0.0455 0.0573 17.20 0.00 0.00 0.00 0.00 0.00 17.20 1249.32 0.09 507.72 0.24 0.00 0.00 3:10 1.1 0.50 0.56 0.45 0.0500 0.0631 18.92 0.00 0.00 0.00 0.00 0.00 18.92 1253.72 0.09 526.55 0.25 0.00 0.00 3:15 1.1 0.50 0.56 0.45 0.0500 0.0631 18.92 0.00 0.00 0.00 0.00 0.00 18.92 1258.57 0.09 545.38 0.26 0.00 0.00 3:20 1.1 0.50 0.56 0.45 0.0500 0.0631 18.92 0.00 0.00 0.00 0.00 0.00 18.92 1263.42 0.09 564.21 0.27 0.00 0.00 3:25 1.2 0.55 0.56 0.49 0.0546 0.0688 20.64 0.00 0.00 0.00 0.00 0.00 20.64 1268.27 0.09 584.76 0.28 0.00 0.00 3:30 1.3 0.59 0.56 0.53 0.0591 0.0745 22.36 0.00 0.00 0.00 0.00 0.00 22.36 1273.56 0.09 607.02 0.29 0.00 0.00 3:35 1.4 0.64 0.56 N/A 0.0739 0.0931 27.93 0.00 0.00 0.00 0.00 0.00 27.93 1279.29 0.09 634.87 0.30 0.00 0.00 3:40 1.4 0.64 0.56 N/A 0.0739 0.0931 27.93 0.00 0.00 0.00 0.00 0.00 27.93 1286.46 0.09 662.72 0.31 0.00 0.00 3:45 1.5 0.68 0.56 N/A 0.1194 0.1504 45.13 0.00 0.00 0.00 0.00 0.00 45.13 1293.63 0.09 707.76 0.33 0.00 0.00 3:50 1.5 0.68 0.56 N/A 0.1194 0.1504 45.13 0.00 0.00 0.00 0.00 0.00 45.13 1305.22 0.09 752.80 0.36 0.00 0.00 3:55 1.6 0.73 0.56 N/A 0.1648 0.2078 62.33 0.00 0.00 0.00 0.00 0.00 62.33 1316.82 0.09 815.04 0.38 0.00 0.00 4:00 1.6 0.73 0.56 N/A 0.1648 0.2078 62.33 0.00 0.00 0.00 0.00 0.00 62.33 1332.84 0.09 877.27 0.41 0.00 0.00 4:05 1.7 0.77 0.56 N/A 0.2103 0.2651 79.53 0.00 0.00 0.00 0.00 0.00 79.53 1348.87 0.09 956.70 0.45 0.00 0.00 4:10 1.8 0.82 0.56 N/A 0.2558 0.3224 96.72 0.00 0.00 0.00 0.00 0.00 96.72 1369.32 0.10 1053.33 0.50 0.00 0.00 4:15 1.9 0.86 0.56 N/A 0.3013 0.3797 113.92 0.00 0.00 0.00 0.00 0.00 113.92 1394.20 0.10 1167.15 0.55 0.00 0.00 406

5 of 6
24 Hour Storm in 15 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:15 0.2 0.04 0.99 0.04 0.0040 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 1123.00 0.23 4.35 0.00 0.00 0.00 0:30 0.3 0.06 0.98 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1124.12 0.23 10.99 0.01 0.00 0.00 0:45 0.3 0.06 0.97 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1125.83 0.23 17.63 0.01 0.00 0.00 1:00 0.4 0.08 0.95 0.07 0.0081 0.0102 9.17 0.00 0.00 0.00 0.00 0.00 9.17 1127.54 0.23 26.56 0.01 0.00 0.00 1:15 0.3 0.06 0.94 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1129.84 0.24 33.20 0.02 0.00 0.00 1:30 0.3 0.06 0.93 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1131.55 0.24 39.84 0.02 0.00 0.00 1:45 0.3 0.06 0.92 0.05 0.0061 0.0076 6.87 0.00 0.00 0.00 0.00 0.00 6.87 1133.26 0.24 46.48 0.02 0.00 0.00 2:00 0.4 0.08 0.91 0.07 0.0081 0.0102 9.17 0.00 0.00 0.00 0.00 0.00 9.17 1134.97 0.24 55.40 0.03 0.00 0.00 2:15 0.4 0.08 0.90 0.07 0.0081 0.0102 9.17 0.00 0.00 0.00 0.00 0.00 9.17 1137.26 0.24 64.33 0.03 0.00 0.00 2:30 0.4 0.08 0.89 0.07 0.0081 0.0102 9.17 0.00 0.00 0.00 0.00 0.00 9.17 1139.56 0.24 73.26 0.03 0.00 0.00 2:45 0.5 0.10 0.88 0.09 0.0101 0.0127 11.46 0.00 0.00 0.00 0.00 0.00 11.46 1141.86 0.24 84.48 0.04 0.00 0.00 3:00 0.5 0.10 0.87 0.09 0.0101 0.0127 11.46 0.00 0.00 0.00 0.00 0.00 11.46 1144.75 0.24 95.70 0.05 0.00 0.00 3:15 0.5 0.10 0.85 0.09 0.0101 0.0127 11.46 0.00 0.00 0.00 0.00 0.00 11.46 1147.64 0.24 106.92 0.05 0.00 0.00 3:30 0.5 0.10 0.84 0.09 0.0101 0.0127 11.46 0.00 0.00 0.00 0.00 0.00 11.46 1150.53 0.24 118.14 0.06 0.00 0.00 3:45 0.5 0.10 0.83 0.09 0.0101 0.0127 11.46 0.00 0.00 0.00 0.00 0.00 11.46 1153.42 0.24 129.35 0.06 0.00 0.00 4:00 0.6 0.12 0.82 0.11 0.0121 0.0153 13.75 0.00 0.00 0.00 0.00 0.00 13.75 1156.30 0.24 142.86 0.07 0.00 0.00 4:15 0.6 0.12 0.81 0.11 0.0121 0.0153 13.75 0.00 0.00 0.00 0.00 0.00 13.75 1159.78 0.24 156.37 0.07 0.00 0.00 4:30 0.7 0.14 0.80 0.13 0.0141 0.0178 16.04 0.00 0.00 0.00 0.00 0.00 16.04 1163.26 0.24 172.16 0.08 0.00 0.00 4:45 0.7 0.14 0.79 0.13 0.0141 0.0178 16.04 0.00 0.00 0.00 0.00 0.00 16.04 1167.33 0.24 187.96 0.09 0.00 0.00 5:00 0.8 0.16 0.78 0.15 0.0162 0.0204 18.33 0.00 0.00 0.00 0.00 0.00 18.33 1171.39 0.24 206.05 0.10 0.00 0.00 5:15 0.6 0.12 0.77 0.11 0.0121 0.0153 13.75 0.00 0.00 0.00 0.00 0.00 13.75 1176.05 0.25 219.55 0.10 0.00 0.00 5:30 0.7 0.14 0.76 0.13 0.0141 0.0178 16.04 0.00 0.00 0.00 0.00 0.00 16.04 1179.53 0.25 235.35 0.11 0.00 0.00 5:45 0.8 0.16 0.75 0.15 0.0162 0.0204 18.33 0.00 0.00 0.00 0.00 0.00 18.33 1183.59 0.25 253.43 0.12 0.00 0.00 6:00 0.8 0.16 0.74 0.15 0.0162 0.0204 18.33 0.00 0.00 0.00 0.00 0.00 18.33 1188.25 0.25 271.52 0.13 0.00 0.00 6:15 0.9 0.18 0.73 0.16 0.0182 0.0229 20.62 0.00 0.00 0.00 0.00 0.00 20.62 1192.91 0.25 291.89 0.14 0.00 0.00 6:30 0.9 0.18 0.72 0.16 0.0182 0.0229 20.62 0.00 0.00 0.00 0.00 0.00 20.62 1198.15 0.25 312.26 0.15 0.00 0.00 6:45 1 0.20 0.71 0.18 0.0202 0.0255 22.91 0.00 0.00 0.00 0.00 0.00 22.91 1203.40 0.25 334.93 0.16 0.00 0.00 7:00 1 0.20 0.70 0.18 0.0202 0.0255 22.91 0.00 0.00 0.00 0.00 0.00 22.91 1209.23 0.25 357.59 0.17 0.00 0.00 7:15 1 0.20 0.69 0.18 0.0202 0.0255 22.91 0.00 0.00 0.00 0.00 0.00 22.91 1215.07 0.25 380.25 0.18 0.00 0.00 7:30 1.1 0.22 0.68 0.20 0.0222 0.0280 25.21 0.00 0.00 0.00 0.00 0.00 25.21 1220.90 0.25 405.20 0.19 0.00 0.00 7:45 1.2 0.24 0.67 0.22 0.0242 0.0306 27.50 0.00 0.00 0.00 0.00 0.00 27.50 1227.33 0.26 432.44 0.20 0.00 0.00 8:00 1.3 0.26 0.66 0.24 0.0263 0.0331 29.79 0.00 0.00 0.00 0.00 0.00 29.79 1234.34 0.26 461.98 0.22 0.00 0.00 8:15 1.5 0.30 0.66 0.27 0.0303 0.0382 34.37 0.00 0.00 0.00 0.00 0.00 34.37 1241.94 0.26 496.09 0.23 0.00 0.00 8:30 1.5 0.30 0.65 0.27 0.0303 0.0382 34.37 0.00 0.00 0.00 0.00 0.00 34.37 1250.73 0.26 530.20 0.25 0.00 0.00 8:45 1.6 0.32 0.64 0.29 0.0323 0.0407 36.66 0.00 0.00 0.00 0.00 0.00 36.66 1259.51 0.26 566.60 0.27 0.00 0.00 9:00 1.7 0.34 0.63 0.31 0.0343 0.0433 38.95 0.00 0.00 0.00 0.00 0.00 38.95 1268.88 0.26 605.29 0.29 0.00 0.00 9:15 1.9 0.38 0.62 0.35 0.0384 0.0484 43.54 0.00 0.00 0.00 0.00 0.00 43.54 1278.84 0.27 648.56 0.31 0.00 0.00 9:30 2 0.40 0.61 0.36 0.0404 0.0509 45.83 0.00 0.00 0.00 0.00 0.00 45.83 1289.98 0.27 694.12 0.33 0.00 0.00 9:45 2.1 0.42 0.60 0.38 0.0424 0.0535 48.12 0.00 0.00 0.00 0.00 0.00 48.12 1301.71 0.27 741.97 0.35 0.00 0.00 10:00 2.2 0.44 0.59 0.40 0.0444 0.0560 50.41 0.00 0.00 0.00 0.00 0.00 50.41 1314.03 0.27 792.11 0.37 0.00 0.00 10:15 1.5 0.30 0.58 0.27 0.0303 0.0382 34.37 0.00 0.00 0.00 0.00 0.00 34.37 1326.94 0.28 826.20 0.39 0.00 0.00 10:30 1.5 0.30 0.58 0.27 0.0303 0.0382 34.37 0.00 0.00 0.00 0.00 0.00 34.37 1335.72 0.28 860.30 0.41 0.00 0.00 10:45 2 0.40 0.57 0.36 0.0404 0.0509 45.83 0.00 0.00 0.00 0.00 0.00 45.83 1344.50 0.28 905.84 0.43 0.00 0.00 11:00 2 0.40 0.56 0.36 0.0404 0.0509 45.83 0.00 0.00 0.00 0.00 0.00 45.83 1356.23 0.28 951.39 0.45 0.00 0.00 11:15 1.9 0.38 0.55 0.35 0.0384 0.0484 43.54 0.00 0.00 0.00 0.00 0.00 43.54 1367.95 0.28 994.64 0.47 0.00 0.00 11:30 1.9 0.38 0.54 0.35 0.0384 0.0484 43.54 0.00 0.00 0.00 0.00 0.00 43.54 1379.09 0.29 1037.89 0.49 0.00 0.00 11:45 1.7 0.34 0.53 0.31 0.0343 0.0433 38.95 0.00 0.00 0.00 0.00 0.00 38.95 1390.22 0.29 1076.56 0.51 0.00 0.00 12:00 1.8 0.36 0.53 0.33 0.0364 0.0458 41.25 0.00 0.00 0.00 0.00 0.00 41.25 1400.18 0.29 1117.51 0.53 0.00 0.00 12:15 2.5 0.51 0.52 0.45 0.0505 0.0637 57.29 0.00 0.00 0.00 0.00 0.00 57.29 1410.72 0.29 1174.50 0.55 0.00 0.00 12:30 2.6 0.53 0.51 0.47 0.0525 0.0662 59.58 0.00 0.00 0.00 0.00 0.00 59.58 1425.40 0.30 1233.78 0.58 0.00 0.00 12:45 2.8 0.57 0.50 N/A 0.0622 0.0784 70.59 0.00 0.00 0.00 0.00 0.00 70.59 1440.66 0.30 1304.08 0.62 0.00 0.00 408

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HYDROLOGY CALCULATIONS - program updated 4-14-22 LC
Using the RCFC&WCD Short Cut Unit Hydrograph Method
Area Designations Area 1 VERSION 2 Area=0.98ac+0.09ac typ street frontage=1.07ac 5/7/2024 LOT 8
Drainage Area (ac.)1.0700 JOB NUMBER 22106
Unit time (minutes)5 5 5 15
100 Year Storm Duration (hrs)1 3 6 24
Total Precipitation (Plates D-4.4,E-5.2, 5.4, 5.6)(in.)2.41 3.10 3.79 5.05 from NOAA interactive website Soils Group A
AMC index II Runoff Number (plate E-6.1)32
Plate E-6.2 Pervious Area Loss Rate (Fp)(in/hr)0.74 (AMC II) Percentage of Impervious Cover (Ai)(%) (plate E-6.3)26.6 20% per the RCFC Hydrology Manual 1AC LOT-PLATE D 5.6 AND 0.09AC TYPICAL STREET FRONTAGE Weighted Average Loss Rate (F=Fp(1-.9Ai))(in./hr.)0.56 (used for 1, 3, and 6 hour storm, the 24 hour storm uses variable maximum loss rate per plate E-1.1 (3 of 6)) Low Loss Rate Percent (%) 90
Retention Basin Percolation Rate (in/hr)0.01 (also used for drywell percolation rate) Percolation is taken incrementally.

Drywell design factors Upper sec. (ft.)=0.001 Lower sec. (ft.)=0.001 Ring diam. (ft.) =0.001 Drywell lower max. (cf)=0.00 Upper max.(cf)=0.00 Gravel bed width around drywell=0.001 Drywell total(cf)=0.00 Ret. Basin design (area, depth) Top =3234 s.f.Bot. =1078 s.f.Max. Depth (d)=4 Max. storage=8238.87 (d/3)*(bottom+top+(bottom*top)^0.50) Formulas vol=(h/3)*(bottom+top+(bottom*top)^0.50) area=bottom+(h/d)*(top-bottom)h=(vol*3)/(bottom+top+(bottom*top)^0.5)(values must be non-zero or error occurs) Outside input from:N/A 3.25
1 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 3.7 1.0700 0.5628 N/A 0.5072 0.5472 164.17 0.00 0.00 0.00 0.00 0.00 164.17 1078.00 0.07 164.09 0.08 0.00 0.00 0:10 4.8 1.3882 0.5628 N/A 0.8253 0.8904 267.13 0.00 0.00 0.00 0.00 0.00 267.13 1120.94 0.08 431.15 0.21 0.00 0.00 0:15 5.1 1.4749 0.5628 N/A 0.9121 0.9841 295.22 0.00 0.00 0.00 0.00 0.00 295.22 1190.83 0.08 726.28 0.35 0.00 0.00 0:20 4.9 1.4171 0.5628 N/A 0.8542 0.9216 276.49 0.00 0.00 0.00 0.00 0.00 276.49 1268.06 0.09 1002.69 0.49 0.00 0.00 0:25 6.6 1.9087 0.5628 N/A 1.3459 1.4521 435.63 0.00 0.00 0.00 0.00 0.00 435.63 1340.39 0.09 1438.22 0.70 0.00 0.00 0:30 7.3 2.1112 0.5628 N/A 1.5483 1.6705 501.15 0.00 0.00 0.00 0.00 0.00 501.15 1454.36 0.10 1939.27 0.94 0.00 0.00 0:35 8.4 2.4293 0.5628 N/A 1.8664 2.0137 604.12 0.00 0.00 0.00 0.00 0.00 604.12 1585.48 0.11 2543.28 1.23 0.00 0.00 0:40 9 2.6028 0.5628 N/A 2.0400 2.2009 660.28 0.00 0.00 0.00 0.00 0.00 660.28 1743.54 0.12 3203.44 1.56 0.00 0.00 0:45 12.3 3.5572 0.5628 N/A 2.9943 3.2306 969.19 0.00 0.00 0.00 0.00 0.00 969.19 1916.30 0.13 4172.49 2.03 0.00 0.00 0:50 17.6 5.0899 0.5628 N/A 4.5271 4.8843 1465.30 0.00 0.00 0.00 0.00 0.00 1465.30 2169.89 0.15 5637.64 2.74 0.00 0.00 0:55 16.1 4.6561 0.5628 N/A 4.0933 4.4163 1324.89 0.00 0.00 0.00 0.00 0.00 1324.89 2553.30 0.18 6962.36 3.38 0.00 0.00 1:00 4.2 1.2146 0.5628 N/A 0.6518 0.7032 210.97 0.00 0.00 0.00 0.00 0.00 210.97 2899.95 0.20 7173.13 3.48 0.00 0.00 MAX DEPTH 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2955.11 0.21 7172.92 3.48 0.00 0.00 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2955.06 0.21 7172.72 3.48 0.00 0.00 1:15 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2955.00 0.21 7172.51 3.48 0.00 0.00 Total volume (cf)7174.54 Total Overflow (cf)0.00
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3 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 1.3 0.48 0.56 0.44 0.0484 0.0522 15.65 0.00 0.00 0.00 0.00 0.00 15.65 1078.00 0.07 15.58 0.01 0.00 0.00 0:10 1.3 0.48 0.56 0.44 0.0484 0.0522 15.65 0.00 0.00 0.00 0.00 0.00 15.65 1082.08 0.08 31.16 0.02 0.00 0.00 0:15 1.1 0.41 0.56 0.37 0.0409 0.0441 13.24 0.00 0.00 0.00 0.00 0.00 13.24 1086.15 0.08 44.33 0.02 0.00 0.00 0:20 1.5 0.56 0.56 0.50 0.0558 0.0602 18.06 0.00 0.00 0.00 0.00 0.00 18.06 1089.60 0.08 62.31 0.03 0.00 0.00 0:25 1.5 0.56 0.56 0.50 0.0558 0.0602 18.06 0.00 0.00 0.00 0.00 0.00 18.06 1094.31 0.08 80.30 0.04 0.00 0.00 0:30 1.8 0.67 0.56 N/A 0.1068 0.1152 34.55 0.00 0.00 0.00 0.00 0.00 34.55 1099.01 0.08 114.77 0.06 0.00 0.00 0:35 1.5 0.56 0.56 0.50 0.0558 0.0602 18.06 0.00 0.00 0.00 0.00 0.00 18.06 1108.03 0.08 132.76 0.06 0.00 0.00 0:40 1.8 0.67 0.56 N/A 0.1068 0.1152 34.55 0.00 0.00 0.00 0.00 0.00 34.55 1112.74 0.08 167.23 0.08 0.00 0.00 0:45 1.8 0.67 0.56 N/A 0.1068 0.1152 34.55 0.00 0.00 0.00 0.00 0.00 34.55 1121.76 0.08 201.71 0.10 0.00 0.00 0:50 1.5 0.56 0.56 0.50 0.0558 0.0602 18.06 0.00 0.00 0.00 0.00 0.00 18.06 1130.79 0.08 219.69 0.11 0.00 0.00 0:55 1.6 0.60 0.56 0.54 0.0595 0.0642 19.27 0.00 0.00 0.00 0.00 0.00 19.27 1135.49 0.08 238.88 0.12 0.00 0.00 1:00 1.8 0.67 0.56 N/A 0.1068 0.1152 34.55 0.00 0.00 0.00 0.00 0.00 34.55 1140.51 0.08 273.35 0.13 0.00 0.00 1:05 2.2 0.82 0.56 N/A 0.2556 0.2757 82.72 0.00 0.00 0.00 0.00 0.00 82.72 1149.53 0.08 355.99 0.17 0.00 0.00 1:10 2.2 0.82 0.56 N/A 0.2556 0.2757 82.72 0.00 0.00 0.00 0.00 0.00 82.72 1171.16 0.08 438.63 0.21 0.00 0.00 1:15 2.2 0.82 0.56 N/A 0.2556 0.2757 82.72 0.00 0.00 0.00 0.00 0.00 82.72 1192.78 0.08 521.26 0.25 0.00 0.00 1:20 2 0.74 0.56 N/A 0.1812 0.1955 58.64 0.00 0.00 0.00 0.00 0.00 58.64 1214.41 0.08 579.81 0.28 0.00 0.00 1:25 2.6 0.97 0.56 N/A 0.4044 0.4363 130.88 0.00 0.00 0.00 0.00 0.00 130.88 1229.73 0.09 710.61 0.35 0.00 0.00 1:30 2.7 1.00 0.56 N/A 0.4416 0.4764 142.92 0.00 0.00 0.00 0.00 0.00 142.92 1263.96 0.09 853.44 0.41 0.00 0.00 1:35 2.4 0.89 0.56 N/A 0.3300 0.3560 106.80 0.00 0.00 0.00 0.00 0.00 106.80 1301.33 0.09 960.15 0.47 0.00 0.00 1:40 2.7 1.00 0.56 N/A 0.4416 0.4764 142.92 0.00 0.00 0.00 0.00 0.00 142.92 1329.26 0.09 1102.98 0.54 0.00 0.00 1:45 3.3 1.23 0.56 N/A 0.6648 0.7172 215.16 0.00 0.00 0.00 0.00 0.00 215.16 1366.63 0.09 1318.05 0.64 0.00 0.00 1:50 3.1 1.15 0.56 N/A 0.5904 0.6369 191.08 0.00 0.00 0.00 0.00 0.00 191.08 1422.92 0.10 1509.03 0.73 0.00 0.00 1:55 2.9 1.08 0.56 N/A 0.5160 0.5567 167.00 0.00 0.00 0.00 0.00 0.00 167.00 1472.89 0.10 1675.93 0.81 0.00 0.00 2:00 3 1.12 0.56 N/A 0.5532 0.5968 179.04 0.00 0.00 0.00 0.00 0.00 179.04 1516.57 0.11 1854.87 0.90 0.00 0.00 2:05 3.1 1.15 0.56 N/A 0.5904 0.6369 191.08 0.00 0.00 0.00 0.00 0.00 191.08 1563.39 0.11 2045.84 0.99 0.00 0.00 2:10 4.2 1.56 0.56 N/A 0.9996 1.0784 323.53 0.00 0.00 0.00 0.00 0.00 323.53 1613.37 0.11 2369.26 1.15 0.00 0.00 2:15 5 1.86 0.56 N/A 1.2972 1.3995 419.86 0.00 0.00 0.00 0.00 0.00 419.86 1698.00 0.12 2789.00 1.35 0.00 0.00 2:20 3.5 1.30 0.56 N/A 0.7392 0.7975 239.25 0.00 0.00 0.00 0.00 0.00 239.25 1807.84 0.13 3028.12 1.47 0.00 0.00 2:25 6.8 2.53 0.56 N/A 1.9668 2.1220 636.59 0.00 0.00 0.00 0.00 0.00 636.59 1870.42 0.13 3664.58 1.78 0.00 0.00 2:30 7.3 2.72 0.56 N/A 2.1528 2.3226 696.79 0.00 0.00 0.00 0.00 0.00 696.79 2036.97 0.14 4361.23 2.12 0.00 0.00 2:35 8.2 3.05 0.56 N/A 2.4876 2.6839 805.16 0.00 0.00 0.00 0.00 0.00 805.16 2219.28 0.15 5166.24 2.51 0.00 0.00 2:40 5.9 2.19 0.56 N/A 1.6320 1.7607 528.22 0.00 0.00 0.00 0.00 0.00 528.22 2429.94 0.17 5694.30 2.76 0.00 0.00 2:45 2 0.74 0.56 N/A 0.1812 0.1955 58.64 0.00 0.00 0.00 0.00 0.00 58.64 2568.12 0.18 5752.75 2.79 0.00 0.00 2:50 1.8 0.67 0.56 N/A 0.1068 0.1152 34.55 0.00 0.00 0.00 0.00 0.00 34.55 2583.42 0.18 5787.13 2.81 0.00 0.00 2:55 1.8 0.67 0.56 N/A 0.1068 0.1152 34.55 0.00 0.00 0.00 0.00 0.00 34.55 2592.41 0.18 5821.50 2.83 0.00 0.00 3:00 0.6 0.22 0.56 0.20 0.0223 0.0241 7.22 0.00 0.00 0.00 0.00 0.00 7.22 2601.41 0.18 5828.55 2.83 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2603.25 0.18 5828.36 2.83 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2603.20 0.18 5828.18 2.83 0.00 0.00 3:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2603.16 0.18 5828.00 2.83 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2603.11 0.18 5827.82 2.83 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2603.06 0.18 5827.64 2.83 0.00 0.00 3:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2603.01 0.18 5827.46 2.83 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2602.97 0.18 5827.28 2.83 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2602.92 0.18 5827.10 2.83 0.00 0.00 Total volume (cf)5832.33 Total Overflow (cf)0.00
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6 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 0.5 0.23 0.56 0.20 0.0227 0.0245 7.36 0.00 0.00 0.00 0.00 0.00 7.36 1078.00 0.07 7.29 0.00 0.00 0.00 0:10 0.6 0.27 0.56 0.25 0.0273 0.0294 8.83 0.00 0.00 0.00 0.00 0.00 8.83 1079.91 0.07 16.04 0.01 0.00 0.00 0:15 0.6 0.27 0.56 0.25 0.0273 0.0294 8.83 0.00 0.00 0.00 0.00 0.00 8.83 1082.20 0.08 24.80 0.01 0.00 0.00 0:20 0.6 0.27 0.56 0.25 0.0273 0.0294 8.83 0.00 0.00 0.00 0.00 0.00 8.83 1084.49 0.08 33.56 0.02 0.00 0.00 0:25 0.6 0.27 0.56 0.25 0.0273 0.0294 8.83 0.00 0.00 0.00 0.00 0.00 8.83 1086.78 0.08 42.31 0.02 0.00 0.00 0:30 0.7 0.32 0.56 0.29 0.0318 0.0343 10.30 0.00 0.00 0.00 0.00 0.00 10.30 1089.07 0.08 52.54 0.03 0.00 0.00 0:35 0.7 0.32 0.56 0.29 0.0318 0.0343 10.30 0.00 0.00 0.00 0.00 0.00 10.30 1091.75 0.08 62.77 0.03 0.00 0.00 0:40 0.7 0.32 0.56 0.29 0.0318 0.0343 10.30 0.00 0.00 0.00 0.00 0.00 10.30 1094.43 0.08 73.00 0.04 0.00 0.00 0:45 0.7 0.32 0.56 0.29 0.0318 0.0343 10.30 0.00 0.00 0.00 0.00 0.00 10.30 1097.10 0.08 83.23 0.04 0.00 0.00 0:50 0.7 0.32 0.56 0.29 0.0318 0.0343 10.30 0.00 0.00 0.00 0.00 0.00 10.30 1099.78 0.08 93.46 0.05 0.00 0.00 0:55 0.7 0.32 0.56 0.29 0.0318 0.0343 10.30 0.00 0.00 0.00 0.00 0.00 10.30 1102.46 0.08 103.68 0.05 0.00 0.00 1:00 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1105.13 0.08 115.38 0.06 0.00 0.00 1:05 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1108.19 0.08 127.08 0.06 0.00 0.00 1:10 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1111.26 0.08 138.78 0.07 0.00 0.00 1:15 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1114.32 0.08 150.48 0.07 0.00 0.00 1:20 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1117.38 0.08 162.18 0.08 0.00 0.00 1:25 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1120.44 0.08 173.88 0.08 0.00 0.00 1:30 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1123.50 0.08 185.58 0.09 0.00 0.00 1:35 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1126.56 0.08 197.28 0.10 0.00 0.00 1:40 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1129.62 0.08 208.98 0.10 0.00 0.00 1:45 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1132.69 0.08 220.67 0.11 0.00 0.00 1:50 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1135.75 0.08 232.37 0.11 0.00 0.00 1:55 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1138.81 0.08 244.07 0.12 0.00 0.00 2:00 0.9 0.41 0.56 0.37 0.0409 0.0442 13.25 0.00 0.00 0.00 0.00 0.00 13.25 1141.87 0.08 257.24 0.12 0.00 0.00 2:05 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1145.32 0.08 268.94 0.13 0.00 0.00 2:10 0.9 0.41 0.56 0.37 0.0409 0.0442 13.25 0.00 0.00 0.00 0.00 0.00 13.25 1148.38 0.08 282.10 0.14 0.00 0.00 2:15 0.9 0.41 0.56 0.37 0.0409 0.0442 13.25 0.00 0.00 0.00 0.00 0.00 13.25 1151.82 0.08 295.27 0.14 0.00 0.00 2:20 0.9 0.41 0.56 0.37 0.0409 0.0442 13.25 0.00 0.00 0.00 0.00 0.00 13.25 1155.27 0.08 308.44 0.15 0.00 0.00 2:25 0.9 0.41 0.56 0.37 0.0409 0.0442 13.25 0.00 0.00 0.00 0.00 0.00 13.25 1158.71 0.08 321.61 0.16 0.00 0.00 2:30 0.9 0.41 0.56 0.37 0.0409 0.0442 13.25 0.00 0.00 0.00 0.00 0.00 13.25 1162.16 0.08 334.78 0.16 0.00 0.00 2:35 0.9 0.41 0.56 0.37 0.0409 0.0442 13.25 0.00 0.00 0.00 0.00 0.00 13.25 1165.61 0.08 347.95 0.17 0.00 0.00 2:40 0.9 0.41 0.56 0.37 0.0409 0.0442 13.25 0.00 0.00 0.00 0.00 0.00 13.25 1169.05 0.08 361.11 0.18 0.00 0.00 2:45 1 0.45 0.56 0.41 0.0455 0.0491 14.72 0.00 0.00 0.00 0.00 0.00 14.72 1172.50 0.08 375.75 0.18 0.00 0.00 2:50 1 0.45 0.56 0.41 0.0455 0.0491 14.72 0.00 0.00 0.00 0.00 0.00 14.72 1176.33 0.08 390.39 0.19 0.00 0.00 2:55 1 0.45 0.56 0.41 0.0455 0.0491 14.72 0.00 0.00 0.00 0.00 0.00 14.72 1180.16 0.08 405.03 0.20 0.00 0.00 3:00 1 0.45 0.56 0.41 0.0455 0.0491 14.72 0.00 0.00 0.00 0.00 0.00 14.72 1183.99 0.08 419.67 0.20 0.00 0.00 3:05 1 0.45 0.56 0.41 0.0455 0.0491 14.72 0.00 0.00 0.00 0.00 0.00 14.72 1187.82 0.08 434.31 0.21 0.00 0.00 3:10 1.1 0.50 0.56 0.45 0.0500 0.0540 16.19 0.00 0.00 0.00 0.00 0.00 16.19 1191.65 0.08 450.42 0.22 0.00 0.00 3:15 1.1 0.50 0.56 0.45 0.0500 0.0540 16.19 0.00 0.00 0.00 0.00 0.00 16.19 1195.87 0.08 466.53 0.23 0.00 0.00 3:20 1.1 0.50 0.56 0.45 0.0500 0.0540 16.19 0.00 0.00 0.00 0.00 0.00 16.19 1200.08 0.08 482.64 0.23 0.00 0.00 3:25 1.2 0.55 0.56 0.49 0.0546 0.0589 17.66 0.00 0.00 0.00 0.00 0.00 17.66 1204.30 0.08 500.22 0.24 0.00 0.00 3:30 1.3 0.59 0.56 0.53 0.0591 0.0638 19.14 0.00 0.00 0.00 0.00 0.00 19.14 1208.90 0.08 519.27 0.25 0.00 0.00 3:35 1.4 0.64 0.56 N/A 0.0739 0.0797 23.91 0.00 0.00 0.00 0.00 0.00 23.91 1213.89 0.08 543.10 0.26 0.00 0.00 3:40 1.4 0.64 0.56 N/A 0.0739 0.0797 23.91 0.00 0.00 0.00 0.00 0.00 23.91 1220.12 0.08 566.92 0.28 0.00 0.00 3:45 1.5 0.68 0.56 N/A 0.1194 0.1288 38.63 0.00 0.00 0.00 0.00 0.00 38.63 1226.36 0.09 605.47 0.29 0.00 0.00 3:50 1.5 0.68 0.56 N/A 0.1194 0.1288 38.63 0.00 0.00 0.00 0.00 0.00 38.63 1236.44 0.09 644.02 0.31 0.00 0.00 3:55 1.6 0.73 0.56 N/A 0.1648 0.1778 53.35 0.00 0.00 0.00 0.00 0.00 53.35 1246.53 0.09 697.29 0.34 0.00 0.00 4:00 1.6 0.73 0.56 N/A 0.1648 0.1778 53.35 0.00 0.00 0.00 0.00 0.00 53.35 1260.47 0.09 750.55 0.36 0.00 0.00 4:05 1.7 0.77 0.56 N/A 0.2103 0.2269 68.07 0.00 0.00 0.00 0.00 0.00 68.07 1274.41 0.09 818.54 0.40 0.00 0.00 4:10 1.8 0.82 0.56 N/A 0.2558 0.2760 82.79 0.00 0.00 0.00 0.00 0.00 82.79 1292.20 0.09 901.24 0.44 0.00 0.00 4:15 1.9 0.86 0.56 N/A 0.3013 0.3251 97.52 0.00 0.00 0.00 0.00 0.00 97.52 1313.84 0.09 998.67 0.48 0.00 0.00 412

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4:20 2 0.91 0.56 N/A 0.3468 0.3741 112.24 0.00 0.00 0.00 0.00 0.00 112.24 1339.34 0.09 1110.81 0.54 0.00 0.00 4:25 2.1 0.96 0.56 N/A 0.3922 0.4232 126.96 0.00 0.00 0.00 0.00 0.00 126.96 1368.68 0.10 1237.67 0.60 0.00 0.00 4:30 2.1 0.96 0.56 N/A 0.3922 0.4232 126.96 0.00 0.00 0.00 0.00 0.00 126.96 1401.88 0.10 1364.53 0.66 0.00 0.00 4:35 2.2 1.00 0.56 N/A 0.4377 0.4723 141.68 0.00 0.00 0.00 0.00 0.00 141.68 1435.08 0.10 1506.11 0.73 0.00 0.00 4:40 2.3 1.05 0.56 N/A 0.4832 0.5213 156.40 0.00 0.00 0.00 0.00 0.00 156.40 1472.13 0.10 1662.41 0.81 0.00 0.00 4:45 2.4 1.09 0.56 N/A 0.5287 0.5704 171.12 0.00 0.00 0.00 0.00 0.00 171.12 1513.03 0.11 1833.42 0.89 0.00 0.00 4:50 2.4 1.09 0.56 N/A 0.5287 0.5704 171.12 0.00 0.00 0.00 0.00 0.00 171.12 1557.78 0.11 2004.43 0.97 0.00 0.00 4:55 2.5 1.14 0.56 N/A 0.5742 0.6195 185.84 0.00 0.00 0.00 0.00 0.00 185.84 1602.53 0.11 2190.16 1.06 0.00 0.00 5:00 2.6 1.18 0.56 N/A 0.6196 0.6685 200.56 0.00 0.00 0.00 0.00 0.00 200.56 1651.13 0.11 2390.61 1.16 0.00 0.00 5:05 3.1 1.41 0.56 N/A 0.8470 0.9139 274.16 0.00 0.00 0.00 0.00 0.00 274.16 1703.59 0.12 2664.65 1.29 0.00 0.00 5:10 3.6 1.64 0.56 N/A 1.0744 1.1592 347.77 0.00 0.00 0.00 0.00 0.00 347.77 1775.30 0.12 3012.30 1.46 0.00 0.00 5:15 3.9 1.77 0.56 N/A 1.2109 1.3064 391.93 0.00 0.00 0.00 0.00 0.00 391.93 1866.28 0.13 3404.10 1.65 0.00 0.00 5:20 4.2 1.91 0.56 N/A 1.3473 1.4536 436.09 0.00 0.00 0.00 0.00 0.00 436.09 1968.81 0.14 3840.05 1.86 0.00 0.00 5:25 4.7 2.14 0.56 N/A 1.5747 1.6990 509.70 0.00 0.00 0.00 0.00 0.00 509.70 2082.89 0.14 4349.60 2.11 0.00 0.00 5:30 5.6 2.55 0.56 N/A 1.9840 2.1406 642.18 0.00 0.00 0.00 0.00 0.00 642.18 2216.23 0.15 4991.63 2.42 0.00 0.00 5:35 1.9 0.86 0.56 N/A 0.3013 0.3251 97.52 0.00 0.00 0.00 0.00 0.00 97.52 2384.24 0.17 5088.98 2.47 0.00 0.00 5:40 0.9 0.41 0.56 0.37 0.0409 0.0442 13.25 0.00 0.00 0.00 0.00 0.00 13.25 2409.72 0.17 5102.06 2.48 0.00 0.00 5:45 0.6 0.27 0.56 0.25 0.0273 0.0294 8.83 0.00 0.00 0.00 0.00 0.00 8.83 2413.14 0.17 5110.73 2.48 0.00 0.00 5:50 0.5 0.23 0.56 0.20 0.0227 0.0245 7.36 0.00 0.00 0.00 0.00 0.00 7.36 2415.41 0.17 5117.92 2.48 0.00 0.00 5:55 0.3 0.14 0.56 0.12 0.0136 0.0147 4.42 0.00 0.00 0.00 0.00 0.00 4.42 2417.29 0.17 5122.17 2.49 0.00 0.00 6:00 0.2 0.09 0.56 0.08 0.0091 0.0098 2.94 0.00 0.00 0.00 0.00 0.00 2.94 2418.40 0.17 5124.95 2.49 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2419.13 0.17 5124.78 2.49 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2419.09 0.17 5124.61 2.49 0.00 0.00 6:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2419.04 0.17 5124.44 2.49 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2419.00 0.17 5124.27 2.49 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2418.95 0.17 5124.11 2.49 0.00 0.00 6:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2418.91 0.17 5123.94 2.49 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2418.87 0.17 5123.77 2.49 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2418.82 0.17 5123.60 2.49 0.00 0.00 6:45 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2418.78 0.17 5123.43 2.49 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2418.73 0.17 5123.27 2.49 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2418.69 0.17 5123.10 2.49 0.00 0.00 7:00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2418.65 0.17 5122.93 2.49 0.00 0.00 Total volume (cf)5131.78 Total Overflow (cf)0.00
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24 Hour Storm in 15 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:15 0.2 0.04 0.99 0.04 0.0040 0.0044 3.92 0.00 0.00 0.00 0.00 0.00 3.92 1078.00 0.22 3.70 0.00 0.00 0.00 0:30 0.3 0.06 0.98 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1078.97 0.22 9.36 0.00 0.00 0.00 0:45 0.3 0.06 0.97 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1080.45 0.23 15.02 0.01 0.00 0.00 1:00 0.4 0.08 0.95 0.07 0.0081 0.0087 7.85 0.00 0.00 0.00 0.00 0.00 7.85 1081.93 0.23 22.64 0.01 0.00 0.00 1:15 0.3 0.06 0.94 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1083.92 0.23 28.30 0.01 0.00 0.00 1:30 0.3 0.06 0.93 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1085.40 0.23 33.95 0.02 0.00 0.00 1:45 0.3 0.06 0.92 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1086.89 0.23 39.61 0.02 0.00 0.00 2:00 0.4 0.08 0.91 0.07 0.0081 0.0087 7.85 0.00 0.00 0.00 0.00 0.00 7.85 1088.37 0.23 47.23 0.02 0.00 0.00 2:15 0.4 0.08 0.90 0.07 0.0081 0.0087 7.85 0.00 0.00 0.00 0.00 0.00 7.85 1090.36 0.23 54.85 0.03 0.00 0.00 2:30 0.4 0.08 0.89 0.07 0.0081 0.0087 7.85 0.00 0.00 0.00 0.00 0.00 7.85 1092.35 0.23 62.47 0.03 0.00 0.00 2:45 0.5 0.10 0.88 0.09 0.0101 0.0109 9.81 0.00 0.00 0.00 0.00 0.00 9.81 1094.35 0.23 72.05 0.03 0.00 0.00 3:00 0.5 0.10 0.87 0.09 0.0101 0.0109 9.81 0.00 0.00 0.00 0.00 0.00 9.81 1096.85 0.23 81.63 0.04 0.00 0.00 3:15 0.5 0.10 0.85 0.09 0.0101 0.0109 9.81 0.00 0.00 0.00 0.00 0.00 9.81 1099.36 0.23 91.21 0.04 0.00 0.00 3:30 0.5 0.10 0.84 0.09 0.0101 0.0109 9.81 0.00 0.00 0.00 0.00 0.00 9.81 1101.87 0.23 100.78 0.05 0.00 0.00 3:45 0.5 0.10 0.83 0.09 0.0101 0.0109 9.81 0.00 0.00 0.00 0.00 0.00 9.81 1104.37 0.23 110.36 0.05 0.00 0.00 4:00 0.6 0.12 0.82 0.11 0.0121 0.0131 11.77 0.00 0.00 0.00 0.00 0.00 11.77 1106.88 0.23 121.90 0.06 0.00 0.00 4:15 0.6 0.12 0.81 0.11 0.0121 0.0131 11.77 0.00 0.00 0.00 0.00 0.00 11.77 1109.90 0.23 133.44 0.06 0.00 0.00 4:30 0.7 0.14 0.80 0.13 0.0141 0.0153 13.73 0.00 0.00 0.00 0.00 0.00 13.73 1112.92 0.23 146.93 0.07 0.00 0.00 4:45 0.7 0.14 0.79 0.13 0.0141 0.0153 13.73 0.00 0.00 0.00 0.00 0.00 13.73 1116.45 0.23 160.43 0.08 0.00 0.00 5:00 0.8 0.16 0.78 0.15 0.0162 0.0174 15.69 0.00 0.00 0.00 0.00 0.00 15.69 1119.98 0.23 175.89 0.09 0.00 0.00 5:15 0.6 0.12 0.77 0.11 0.0121 0.0131 11.77 0.00 0.00 0.00 0.00 0.00 11.77 1124.03 0.23 187.43 0.09 0.00 0.00 5:30 0.7 0.14 0.76 0.13 0.0141 0.0153 13.73 0.00 0.00 0.00 0.00 0.00 13.73 1127.05 0.23 200.92 0.10 0.00 0.00 5:45 0.8 0.16 0.75 0.15 0.0162 0.0174 15.69 0.00 0.00 0.00 0.00 0.00 15.69 1130.58 0.24 216.38 0.11 0.00 0.00 6:00 0.8 0.16 0.74 0.15 0.0162 0.0174 15.69 0.00 0.00 0.00 0.00 0.00 15.69 1134.62 0.24 231.83 0.11 0.00 0.00 6:15 0.9 0.18 0.73 0.16 0.0182 0.0196 17.65 0.00 0.00 0.00 0.00 0.00 17.65 1138.67 0.24 249.25 0.12 0.00 0.00 6:30 0.9 0.18 0.72 0.16 0.0182 0.0196 17.65 0.00 0.00 0.00 0.00 0.00 17.65 1143.22 0.24 266.66 0.13 0.00 0.00 6:45 1 0.20 0.71 0.18 0.0202 0.0218 19.61 0.00 0.00 0.00 0.00 0.00 19.61 1147.78 0.24 286.04 0.14 0.00 0.00 7:00 1 0.20 0.70 0.18 0.0202 0.0218 19.61 0.00 0.00 0.00 0.00 0.00 19.61 1152.85 0.24 305.41 0.15 0.00 0.00 7:15 1 0.20 0.69 0.18 0.0202 0.0218 19.61 0.00 0.00 0.00 0.00 0.00 19.61 1157.92 0.24 324.79 0.16 0.00 0.00 7:30 1.1 0.22 0.68 0.20 0.0222 0.0240 21.58 0.00 0.00 0.00 0.00 0.00 21.58 1162.99 0.24 346.12 0.17 0.00 0.00 7:45 1.2 0.24 0.67 0.22 0.0242 0.0262 23.54 0.00 0.00 0.00 0.00 0.00 23.54 1168.58 0.24 369.42 0.18 0.00 0.00 8:00 1.3 0.26 0.66 0.24 0.0263 0.0283 25.50 0.00 0.00 0.00 0.00 0.00 25.50 1174.67 0.24 394.67 0.19 0.00 0.00 8:15 1.5 0.30 0.66 0.27 0.0303 0.0327 29.42 0.00 0.00 0.00 0.00 0.00 29.42 1181.28 0.25 423.85 0.21 0.00 0.00 8:30 1.5 0.30 0.65 0.27 0.0303 0.0327 29.42 0.00 0.00 0.00 0.00 0.00 29.42 1188.91 0.25 453.02 0.22 0.00 0.00 8:45 1.6 0.32 0.64 0.29 0.0323 0.0349 31.38 0.00 0.00 0.00 0.00 0.00 31.38 1196.55 0.25 484.15 0.24 0.00 0.00 9:00 1.7 0.34 0.63 0.31 0.0343 0.0370 33.34 0.00 0.00 0.00 0.00 0.00 33.34 1204.70 0.25 517.25 0.25 0.00 0.00 9:15 1.9 0.38 0.62 0.35 0.0384 0.0414 37.27 0.00 0.00 0.00 0.00 0.00 37.27 1213.36 0.25 554.26 0.27 0.00 0.00 9:30 2 0.40 0.61 0.36 0.0404 0.0436 39.23 0.00 0.00 0.00 0.00 0.00 39.23 1223.04 0.25 593.24 0.29 0.00 0.00 9:45 2.1 0.42 0.60 0.38 0.0424 0.0458 41.19 0.00 0.00 0.00 0.00 0.00 41.19 1233.24 0.26 634.17 0.31 0.00 0.00 10:00 2.2 0.44 0.59 0.40 0.0444 0.0479 43.15 0.00 0.00 0.00 0.00 0.00 43.15 1243.95 0.26 677.07 0.33 0.00 0.00 10:15 1.5 0.30 0.58 0.27 0.0303 0.0327 29.42 0.00 0.00 0.00 0.00 0.00 29.42 1255.18 0.26 706.23 0.34 0.00 0.00 10:30 1.5 0.30 0.58 0.27 0.0303 0.0327 29.42 0.00 0.00 0.00 0.00 0.00 29.42 1262.81 0.26 735.38 0.36 0.00 0.00 10:45 2 0.40 0.57 0.36 0.0404 0.0436 39.23 0.00 0.00 0.00 0.00 0.00 39.23 1270.44 0.26 774.35 0.38 0.00 0.00 11:00 2 0.40 0.56 0.36 0.0404 0.0436 39.23 0.00 0.00 0.00 0.00 0.00 39.23 1280.64 0.27 813.31 0.39 0.00 0.00 11:15 1.9 0.38 0.55 0.35 0.0384 0.0414 37.27 0.00 0.00 0.00 0.00 0.00 37.27 1290.83 0.27 850.31 0.41 0.00 0.00 11:30 1.9 0.38 0.54 0.35 0.0384 0.0414 37.27 0.00 0.00 0.00 0.00 0.00 37.27 1300.51 0.27 887.31 0.43 0.00 0.00 11:45 1.7 0.34 0.53 0.31 0.0343 0.0370 33.34 0.00 0.00 0.00 0.00 0.00 33.34 1310.20 0.27 920.38 0.45 0.00 0.00 12:00 1.8 0.36 0.53 0.33 0.0364 0.0392 35.31 0.00 0.00 0.00 0.00 0.00 35.31 1318.85 0.27 955.41 0.46 0.00 0.00 12:15 2.5 0.51 0.52 0.45 0.0505 0.0545 49.04 0.00 0.00 0.00 0.00 0.00 49.04 1328.02 0.28 1004.17 0.49 0.00 0.00 12:30 2.6 0.53 0.51 0.47 0.0525 0.0567 51.00 0.00 0.00 0.00 0.00 0.00 51.00 1340.78 0.28 1054.89 0.51 0.00 0.00 12:45 2.8 0.57 0.50 N/A 0.0622 0.0671 60.43 0.00 0.00 0.00 0.00 0.00 60.43 1354.05 0.28 1115.04 0.54 0.00 0.00 414

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13:00 2.9 0.59 0.50 N/A 0.0900 0.0971 87.42 0.00 0.00 0.00 0.00 0.00 87.42 1369.79 0.29 1202.17 0.58 0.00 0.00 13:15 3.4 0.69 0.49 N/A 0.1985 0.2142 192.78 0.00 0.00 0.00 0.00 0.00 192.78 1392.59 0.29 1394.66 0.68 0.00 0.00 13:30 3.4 0.69 0.48 N/A 0.2059 0.2222 199.97 0.00 0.00 0.00 0.00 0.00 199.97 1442.96 0.30 1594.33 0.77 0.00 0.00 13:45 2.3 0.46 0.47 0.42 0.0465 0.0501 45.11 0.00 0.00 0.00 0.00 0.00 45.11 1495.22 0.31 1639.13 0.80 0.00 0.00 14:00 2.3 0.46 0.47 0.42 0.0465 0.0501 45.11 0.00 0.00 0.00 0.00 0.00 45.11 1506.94 0.31 1683.93 0.82 0.00 0.00 14:15 2.7 0.55 0.46 N/A 0.0862 0.0930 83.69 0.00 0.00 0.00 0.00 0.00 83.69 1518.66 0.32 1767.30 0.86 0.00 0.00 14:30 2.6 0.53 0.45 N/A 0.0730 0.0788 70.88 0.00 0.00 0.00 0.00 0.00 70.88 1540.48 0.32 1837.87 0.89 0.00 0.00 14:45 2.6 0.53 0.45 N/A 0.0799 0.0862 77.60 0.00 0.00 0.00 0.00 0.00 77.60 1558.94 0.32 1915.14 0.93 0.00 0.00 15:00 2.5 0.51 0.44 N/A 0.0665 0.0718 64.60 0.00 0.00 0.00 0.00 0.00 64.60 1579.17 0.33 1979.41 0.96 0.00 0.00 15:15 2.4 0.48 0.43 N/A 0.0530 0.0572 51.50 0.00 0.00 0.00 0.00 0.00 51.50 1595.98 0.33 2030.58 0.99 0.00 0.00 15:30 2.3 0.46 0.43 0.42 0.0465 0.0501 45.11 0.00 0.00 0.00 0.00 0.00 45.11 1609.37 0.34 2075.36 1.01 0.00 0.00 15:45 1.9 0.38 0.42 0.35 0.0384 0.0414 37.27 0.00 0.00 0.00 0.00 0.00 37.27 1621.09 0.34 2112.29 1.03 0.00 0.00 16:00 1.9 0.38 0.41 0.35 0.0384 0.0414 37.27 0.00 0.00 0.00 0.00 0.00 37.27 1630.76 0.34 2149.21 1.04 0.00 0.00 16:15 0.4 0.08 0.41 0.07 0.0081 0.0087 7.85 0.00 0.00 0.00 0.00 0.00 7.85 1640.42 0.34 2156.72 1.05 0.00 0.00 16:30 0.4 0.08 0.40 0.07 0.0081 0.0087 7.85 0.00 0.00 0.00 0.00 0.00 7.85 1642.38 0.34 2164.22 1.05 0.00 0.00 16:45 0.3 0.06 0.39 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1644.35 0.34 2169.76 1.05 0.00 0.00 17:00 0.3 0.06 0.39 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1645.80 0.34 2175.31 1.06 0.00 0.00 17:15 0.5 0.10 0.38 0.09 0.0101 0.0109 9.81 0.00 0.00 0.00 0.00 0.00 9.81 1647.25 0.34 2184.77 1.06 0.00 0.00 17:30 0.5 0.10 0.38 0.09 0.0101 0.0109 9.81 0.00 0.00 0.00 0.00 0.00 9.81 1649.72 0.34 2194.23 1.07 0.00 0.00 17:45 0.5 0.10 0.37 0.09 0.0101 0.0109 9.81 0.00 0.00 0.00 0.00 0.00 9.81 1652.20 0.34 2203.70 1.07 0.00 0.00 18:00 0.4 0.08 0.37 0.07 0.0081 0.0087 7.85 0.00 0.00 0.00 0.00 0.00 7.85 1654.68 0.34 2211.20 1.07 0.00 0.00 18:15 0.4 0.08 0.36 0.07 0.0081 0.0087 7.85 0.00 0.00 0.00 0.00 0.00 7.85 1656.64 0.35 2218.70 1.08 0.00 0.00 18:30 0.4 0.08 0.35 0.07 0.0081 0.0087 7.85 0.00 0.00 0.00 0.00 0.00 7.85 1658.60 0.35 2226.20 1.08 0.00 0.00 18:45 0.3 0.06 0.35 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1660.57 0.35 2231.74 1.08 0.00 0.00 19:00 0.2 0.04 0.34 0.04 0.0040 0.0044 3.92 0.00 0.00 0.00 0.00 0.00 3.92 1662.02 0.35 2235.31 1.09 0.00 0.00 19:15 0.3 0.06 0.34 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1662.95 0.35 2240.85 1.09 0.00 0.00 19:30 0.4 0.08 0.34 0.07 0.0081 0.0087 7.85 0.00 0.00 0.00 0.00 0.00 7.85 1664.40 0.35 2248.35 1.09 0.00 0.00 19:45 0.3 0.06 0.33 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1666.36 0.35 2253.89 1.09 0.00 0.00 20:00 0.2 0.04 0.33 0.04 0.0040 0.0044 3.92 0.00 0.00 0.00 0.00 0.00 3.92 1667.81 0.35 2257.46 1.10 0.00 0.00 20:15 0.3 0.06 0.32 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1668.75 0.35 2263.00 1.10 0.00 0.00 20:30 0.3 0.06 0.32 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1670.20 0.35 2268.54 1.10 0.00 0.00 20:45 0.3 0.06 0.31 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1671.65 0.35 2274.07 1.10 0.00 0.00 21:00 0.2 0.04 0.31 0.04 0.0040 0.0044 3.92 0.00 0.00 0.00 0.00 0.00 3.92 1673.09 0.35 2277.65 1.11 0.00 0.00 21:15 0.3 0.06 0.31 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1674.03 0.35 2283.18 1.11 0.00 0.00 21:30 0.2 0.04 0.30 0.04 0.0040 0.0044 3.92 0.00 0.00 0.00 0.00 0.00 3.92 1675.48 0.35 2286.76 1.11 0.00 0.00 21:45 0.3 0.06 0.30 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1676.41 0.35 2292.29 1.11 0.00 0.00 22:00 0.2 0.04 0.30 0.04 0.0040 0.0044 3.92 0.00 0.00 0.00 0.00 0.00 3.92 1677.86 0.35 2295.87 1.11 0.00 0.00 22:15 0.3 0.06 0.29 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1678.80 0.35 2301.40 1.12 0.00 0.00 22:30 0.2 0.04 0.29 0.04 0.0040 0.0044 3.92 0.00 0.00 0.00 0.00 0.00 3.92 1680.25 0.35 2304.97 1.12 0.00 0.00 22:45 0.2 0.04 0.29 0.04 0.0040 0.0044 3.92 0.00 0.00 0.00 0.00 0.00 3.92 1681.18 0.35 2308.55 1.12 0.00 0.00 23:00 0.2 0.04 0.29 0.04 0.0040 0.0044 3.92 0.00 0.00 0.00 0.00 0.00 3.92 1682.12 0.35 2312.12 1.12 0.00 0.00 23:15 0.2 0.04 0.28 0.04 0.0040 0.0044 3.92 0.00 0.00 0.00 0.00 0.00 3.92 1683.05 0.35 2315.69 1.12 0.00 0.00 23:30 0.2 0.04 0.28 0.04 0.0040 0.0044 3.92 0.00 0.00 0.00 0.00 0.00 3.92 1683.98 0.35 2319.26 1.13 0.00 0.00 23:45 0.2 0.04 0.28 0.04 0.0040 0.0044 3.92 0.00 0.00 0.00 0.00 0.00 3.92 1684.92 0.35 2322.83 1.13 0.00 0.00 24:00 0.2 0.04 0.28 0.04 0.0040 0.0044 3.92 0.00 0.00 0.00 0.00 0.00 3.92 1685.85 0.35 2326.41 1.13 0.00 0.00 0 0.00 0.28 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1686.79 0.35 2326.05 1.13 0.00 0.00 Total volume (cf)2354.08 Total Overflow (cf)0.00
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HYDROLOGY CALCULATIONS - program updated 4-14-22 LC
Using the RCFC&WCD Short Cut Unit Hydrograph Method
Area Designations Area 1 VERSION 2 Area=0.98ac+0.09ac typ street frontage=1.07ac 5/7/2024 LOT 9
Drainage Area (ac.)1.0700 JOB NUMBER 22106
Unit time (minutes)5 5 5 15
100 Year Storm Duration (hrs)1 3 6 24
Total Precipitation (Plates D-4.4,E-5.2, 5.4, 5.6)(in.)2.41 3.10 3.79 5.05 from NOAA interactive website Soils Group A
AMC index II Runoff Number (plate E-6.1)32
Plate E-6.2 Pervious Area Loss Rate (Fp)(in/hr)0.74 (AMC II) Percentage of Impervious Cover (Ai)(%) (plate E-6.3)26.6 20% per the RCFC Hydrology Manual 1AC LOT-PLATE D 5.6 AND 0.09AC TYPICAL STREET FRONTAGE Weighted Average Loss Rate (F=Fp(1-.9Ai))(in./hr.)0.56 (used for 1, 3, and 6 hour storm, the 24 hour storm uses variable maximum loss rate per plate E-1.1 (3 of 6)) Low Loss Rate Percent (%) 90
Retention Basin Percolation Rate (in/hr)0.01 (also used for drywell percolation rate) Percolation is taken incrementally.

Drywell design factors Upper sec. (ft.)=0.001 Lower sec. (ft.)=0.001 Ring diam. (ft.) =0.001 Drywell lower max. (cf)=0.00 Upper max.(cf)=0.00 Gravel bed width around drywell=0.001 Drywell total(cf)=0.00 Ret. Basin design (area, depth) Top =3234 s.f.Bot. =1078 s.f.Max. Depth (d)=4 Max. storage=8238.87 (d/3)*(bottom+top+(bottom*top)^0.50) Formulas vol=(h/3)*(bottom+top+(bottom*top)^0.50) area=bottom+(h/d)*(top-bottom)h=(vol*3)/(bottom+top+(bottom*top)^0.5)(values must be non-zero or error occurs) Outside input from:N/A 3.25
1 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 3.7 1.0700 0.5628 N/A 0.5072 0.5472 164.17 0.00 0.00 0.00 0.00 0.00 164.17 1078.00 0.07 164.09 0.08 0.00 0.00 0:10 4.8 1.3882 0.5628 N/A 0.8253 0.8904 267.13 0.00 0.00 0.00 0.00 0.00 267.13 1120.94 0.08 431.15 0.21 0.00 0.00 0:15 5.1 1.4749 0.5628 N/A 0.9121 0.9841 295.22 0.00 0.00 0.00 0.00 0.00 295.22 1190.83 0.08 726.28 0.35 0.00 0.00 0:20 4.9 1.4171 0.5628 N/A 0.8542 0.9216 276.49 0.00 0.00 0.00 0.00 0.00 276.49 1268.06 0.09 1002.69 0.49 0.00 0.00 0:25 6.6 1.9087 0.5628 N/A 1.3459 1.4521 435.63 0.00 0.00 0.00 0.00 0.00 435.63 1340.39 0.09 1438.22 0.70 0.00 0.00 0:30 7.3 2.1112 0.5628 N/A 1.5483 1.6705 501.15 0.00 0.00 0.00 0.00 0.00 501.15 1454.36 0.10 1939.27 0.94 0.00 0.00 0:35 8.4 2.4293 0.5628 N/A 1.8664 2.0137 604.12 0.00 0.00 0.00 0.00 0.00 604.12 1585.48 0.11 2543.28 1.23 0.00 0.00 0:40 9 2.6028 0.5628 N/A 2.0400 2.2009 660.28 0.00 0.00 0.00 0.00 0.00 660.28 1743.54 0.12 3203.44 1.56 0.00 0.00 0:45 12.3 3.5572 0.5628 N/A 2.9943 3.2306 969.19 0.00 0.00 0.00 0.00 0.00 969.19 1916.30 0.13 4172.49 2.03 0.00 0.00 0:50 17.6 5.0899 0.5628 N/A 4.5271 4.8843 1465.30 0.00 0.00 0.00 0.00 0.00 1465.30 2169.89 0.15 5637.64 2.74 0.00 0.00 0:55 16.1 4.6561 0.5628 N/A 4.0933 4.4163 1324.89 0.00 0.00 0.00 0.00 0.00 1324.89 2553.30 0.18 6962.36 3.38 0.00 0.00 1:00 4.2 1.2146 0.5628 N/A 0.6518 0.7032 210.97 0.00 0.00 0.00 0.00 0.00 210.97 2899.95 0.20 7173.13 3.48 0.00 0.00 MAX DEPTH 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2955.11 0.21 7172.92 3.48 0.00 0.00 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2955.06 0.21 7172.72 3.48 0.00 0.00 1:15 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2955.00 0.21 7172.51 3.48 0.00 0.00 Total volume (cf)7174.54 Total Overflow (cf)0.00
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3 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 1.3 0.48 0.56 0.44 0.0484 0.0522 15.65 0.00 0.00 0.00 0.00 0.00 15.65 1078.00 0.07 15.58 0.01 0.00 0.00 0:10 1.3 0.48 0.56 0.44 0.0484 0.0522 15.65 0.00 0.00 0.00 0.00 0.00 15.65 1082.08 0.08 31.16 0.02 0.00 0.00 0:15 1.1 0.41 0.56 0.37 0.0409 0.0441 13.24 0.00 0.00 0.00 0.00 0.00 13.24 1086.15 0.08 44.33 0.02 0.00 0.00 0:20 1.5 0.56 0.56 0.50 0.0558 0.0602 18.06 0.00 0.00 0.00 0.00 0.00 18.06 1089.60 0.08 62.31 0.03 0.00 0.00 0:25 1.5 0.56 0.56 0.50 0.0558 0.0602 18.06 0.00 0.00 0.00 0.00 0.00 18.06 1094.31 0.08 80.30 0.04 0.00 0.00 0:30 1.8 0.67 0.56 N/A 0.1068 0.1152 34.55 0.00 0.00 0.00 0.00 0.00 34.55 1099.01 0.08 114.77 0.06 0.00 0.00 0:35 1.5 0.56 0.56 0.50 0.0558 0.0602 18.06 0.00 0.00 0.00 0.00 0.00 18.06 1108.03 0.08 132.76 0.06 0.00 0.00 0:40 1.8 0.67 0.56 N/A 0.1068 0.1152 34.55 0.00 0.00 0.00 0.00 0.00 34.55 1112.74 0.08 167.23 0.08 0.00 0.00 0:45 1.8 0.67 0.56 N/A 0.1068 0.1152 34.55 0.00 0.00 0.00 0.00 0.00 34.55 1121.76 0.08 201.71 0.10 0.00 0.00 0:50 1.5 0.56 0.56 0.50 0.0558 0.0602 18.06 0.00 0.00 0.00 0.00 0.00 18.06 1130.79 0.08 219.69 0.11 0.00 0.00 0:55 1.6 0.60 0.56 0.54 0.0595 0.0642 19.27 0.00 0.00 0.00 0.00 0.00 19.27 1135.49 0.08 238.88 0.12 0.00 0.00 1:00 1.8 0.67 0.56 N/A 0.1068 0.1152 34.55 0.00 0.00 0.00 0.00 0.00 34.55 1140.51 0.08 273.35 0.13 0.00 0.00 1:05 2.2 0.82 0.56 N/A 0.2556 0.2757 82.72 0.00 0.00 0.00 0.00 0.00 82.72 1149.53 0.08 355.99 0.17 0.00 0.00 1:10 2.2 0.82 0.56 N/A 0.2556 0.2757 82.72 0.00 0.00 0.00 0.00 0.00 82.72 1171.16 0.08 438.63 0.21 0.00 0.00 1:15 2.2 0.82 0.56 N/A 0.2556 0.2757 82.72 0.00 0.00 0.00 0.00 0.00 82.72 1192.78 0.08 521.26 0.25 0.00 0.00 1:20 2 0.74 0.56 N/A 0.1812 0.1955 58.64 0.00 0.00 0.00 0.00 0.00 58.64 1214.41 0.08 579.81 0.28 0.00 0.00 1:25 2.6 0.97 0.56 N/A 0.4044 0.4363 130.88 0.00 0.00 0.00 0.00 0.00 130.88 1229.73 0.09 710.61 0.35 0.00 0.00 1:30 2.7 1.00 0.56 N/A 0.4416 0.4764 142.92 0.00 0.00 0.00 0.00 0.00 142.92 1263.96 0.09 853.44 0.41 0.00 0.00 1:35 2.4 0.89 0.56 N/A 0.3300 0.3560 106.80 0.00 0.00 0.00 0.00 0.00 106.80 1301.33 0.09 960.15 0.47 0.00 0.00 1:40 2.7 1.00 0.56 N/A 0.4416 0.4764 142.92 0.00 0.00 0.00 0.00 0.00 142.92 1329.26 0.09 1102.98 0.54 0.00 0.00 1:45 3.3 1.23 0.56 N/A 0.6648 0.7172 215.16 0.00 0.00 0.00 0.00 0.00 215.16 1366.63 0.09 1318.05 0.64 0.00 0.00 1:50 3.1 1.15 0.56 N/A 0.5904 0.6369 191.08 0.00 0.00 0.00 0.00 0.00 191.08 1422.92 0.10 1509.03 0.73 0.00 0.00 1:55 2.9 1.08 0.56 N/A 0.5160 0.5567 167.00 0.00 0.00 0.00 0.00 0.00 167.00 1472.89 0.10 1675.93 0.81 0.00 0.00 2:00 3 1.12 0.56 N/A 0.5532 0.5968 179.04 0.00 0.00 0.00 0.00 0.00 179.04 1516.57 0.11 1854.87 0.90 0.00 0.00 2:05 3.1 1.15 0.56 N/A 0.5904 0.6369 191.08 0.00 0.00 0.00 0.00 0.00 191.08 1563.39 0.11 2045.84 0.99 0.00 0.00 2:10 4.2 1.56 0.56 N/A 0.9996 1.0784 323.53 0.00 0.00 0.00 0.00 0.00 323.53 1613.37 0.11 2369.26 1.15 0.00 0.00 2:15 5 1.86 0.56 N/A 1.2972 1.3995 419.86 0.00 0.00 0.00 0.00 0.00 419.86 1698.00 0.12 2789.00 1.35 0.00 0.00 2:20 3.5 1.30 0.56 N/A 0.7392 0.7975 239.25 0.00 0.00 0.00 0.00 0.00 239.25 1807.84 0.13 3028.12 1.47 0.00 0.00 2:25 6.8 2.53 0.56 N/A 1.9668 2.1220 636.59 0.00 0.00 0.00 0.00 0.00 636.59 1870.42 0.13 3664.58 1.78 0.00 0.00 2:30 7.3 2.72 0.56 N/A 2.1528 2.3226 696.79 0.00 0.00 0.00 0.00 0.00 696.79 2036.97 0.14 4361.23 2.12 0.00 0.00 2:35 8.2 3.05 0.56 N/A 2.4876 2.6839 805.16 0.00 0.00 0.00 0.00 0.00 805.16 2219.28 0.15 5166.24 2.51 0.00 0.00 2:40 5.9 2.19 0.56 N/A 1.6320 1.7607 528.22 0.00 0.00 0.00 0.00 0.00 528.22 2429.94 0.17 5694.30 2.76 0.00 0.00 2:45 2 0.74 0.56 N/A 0.1812 0.1955 58.64 0.00 0.00 0.00 0.00 0.00 58.64 2568.12 0.18 5752.75 2.79 0.00 0.00 2:50 1.8 0.67 0.56 N/A 0.1068 0.1152 34.55 0.00 0.00 0.00 0.00 0.00 34.55 2583.42 0.18 5787.13 2.81 0.00 0.00 2:55 1.8 0.67 0.56 N/A 0.1068 0.1152 34.55 0.00 0.00 0.00 0.00 0.00 34.55 2592.41 0.18 5821.50 2.83 0.00 0.00 3:00 0.6 0.22 0.56 0.20 0.0223 0.0241 7.22 0.00 0.00 0.00 0.00 0.00 7.22 2601.41 0.18 5828.55 2.83 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2603.25 0.18 5828.36 2.83 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2603.20 0.18 5828.18 2.83 0.00 0.00 3:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2603.16 0.18 5828.00 2.83 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2603.11 0.18 5827.82 2.83 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2603.06 0.18 5827.64 2.83 0.00 0.00 3:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2603.01 0.18 5827.46 2.83 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2602.97 0.18 5827.28 2.83 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2602.92 0.18 5827.10 2.83 0.00 0.00 Total volume (cf)5832.33 Total Overflow (cf)0.00
417

3 of 6
6 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 0.5 0.23 0.56 0.20 0.0227 0.0245 7.36 0.00 0.00 0.00 0.00 0.00 7.36 1078.00 0.07 7.29 0.00 0.00 0.00 0:10 0.6 0.27 0.56 0.25 0.0273 0.0294 8.83 0.00 0.00 0.00 0.00 0.00 8.83 1079.91 0.07 16.04 0.01 0.00 0.00 0:15 0.6 0.27 0.56 0.25 0.0273 0.0294 8.83 0.00 0.00 0.00 0.00 0.00 8.83 1082.20 0.08 24.80 0.01 0.00 0.00 0:20 0.6 0.27 0.56 0.25 0.0273 0.0294 8.83 0.00 0.00 0.00 0.00 0.00 8.83 1084.49 0.08 33.56 0.02 0.00 0.00 0:25 0.6 0.27 0.56 0.25 0.0273 0.0294 8.83 0.00 0.00 0.00 0.00 0.00 8.83 1086.78 0.08 42.31 0.02 0.00 0.00 0:30 0.7 0.32 0.56 0.29 0.0318 0.0343 10.30 0.00 0.00 0.00 0.00 0.00 10.30 1089.07 0.08 52.54 0.03 0.00 0.00 0:35 0.7 0.32 0.56 0.29 0.0318 0.0343 10.30 0.00 0.00 0.00 0.00 0.00 10.30 1091.75 0.08 62.77 0.03 0.00 0.00 0:40 0.7 0.32 0.56 0.29 0.0318 0.0343 10.30 0.00 0.00 0.00 0.00 0.00 10.30 1094.43 0.08 73.00 0.04 0.00 0.00 0:45 0.7 0.32 0.56 0.29 0.0318 0.0343 10.30 0.00 0.00 0.00 0.00 0.00 10.30 1097.10 0.08 83.23 0.04 0.00 0.00 0:50 0.7 0.32 0.56 0.29 0.0318 0.0343 10.30 0.00 0.00 0.00 0.00 0.00 10.30 1099.78 0.08 93.46 0.05 0.00 0.00 0:55 0.7 0.32 0.56 0.29 0.0318 0.0343 10.30 0.00 0.00 0.00 0.00 0.00 10.30 1102.46 0.08 103.68 0.05 0.00 0.00 1:00 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1105.13 0.08 115.38 0.06 0.00 0.00 1:05 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1108.19 0.08 127.08 0.06 0.00 0.00 1:10 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1111.26 0.08 138.78 0.07 0.00 0.00 1:15 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1114.32 0.08 150.48 0.07 0.00 0.00 1:20 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1117.38 0.08 162.18 0.08 0.00 0.00 1:25 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1120.44 0.08 173.88 0.08 0.00 0.00 1:30 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1123.50 0.08 185.58 0.09 0.00 0.00 1:35 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1126.56 0.08 197.28 0.10 0.00 0.00 1:40 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1129.62 0.08 208.98 0.10 0.00 0.00 1:45 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1132.69 0.08 220.67 0.11 0.00 0.00 1:50 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1135.75 0.08 232.37 0.11 0.00 0.00 1:55 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1138.81 0.08 244.07 0.12 0.00 0.00 2:00 0.9 0.41 0.56 0.37 0.0409 0.0442 13.25 0.00 0.00 0.00 0.00 0.00 13.25 1141.87 0.08 257.24 0.12 0.00 0.00 2:05 0.8 0.36 0.56 0.33 0.0364 0.0393 11.78 0.00 0.00 0.00 0.00 0.00 11.78 1145.32 0.08 268.94 0.13 0.00 0.00 2:10 0.9 0.41 0.56 0.37 0.0409 0.0442 13.25 0.00 0.00 0.00 0.00 0.00 13.25 1148.38 0.08 282.10 0.14 0.00 0.00 2:15 0.9 0.41 0.56 0.37 0.0409 0.0442 13.25 0.00 0.00 0.00 0.00 0.00 13.25 1151.82 0.08 295.27 0.14 0.00 0.00 2:20 0.9 0.41 0.56 0.37 0.0409 0.0442 13.25 0.00 0.00 0.00 0.00 0.00 13.25 1155.27 0.08 308.44 0.15 0.00 0.00 2:25 0.9 0.41 0.56 0.37 0.0409 0.0442 13.25 0.00 0.00 0.00 0.00 0.00 13.25 1158.71 0.08 321.61 0.16 0.00 0.00 2:30 0.9 0.41 0.56 0.37 0.0409 0.0442 13.25 0.00 0.00 0.00 0.00 0.00 13.25 1162.16 0.08 334.78 0.16 0.00 0.00 2:35 0.9 0.41 0.56 0.37 0.0409 0.0442 13.25 0.00 0.00 0.00 0.00 0.00 13.25 1165.61 0.08 347.95 0.17 0.00 0.00 2:40 0.9 0.41 0.56 0.37 0.0409 0.0442 13.25 0.00 0.00 0.00 0.00 0.00 13.25 1169.05 0.08 361.11 0.18 0.00 0.00 2:45 1 0.45 0.56 0.41 0.0455 0.0491 14.72 0.00 0.00 0.00 0.00 0.00 14.72 1172.50 0.08 375.75 0.18 0.00 0.00 2:50 1 0.45 0.56 0.41 0.0455 0.0491 14.72 0.00 0.00 0.00 0.00 0.00 14.72 1176.33 0.08 390.39 0.19 0.00 0.00 2:55 1 0.45 0.56 0.41 0.0455 0.0491 14.72 0.00 0.00 0.00 0.00 0.00 14.72 1180.16 0.08 405.03 0.20 0.00 0.00 3:00 1 0.45 0.56 0.41 0.0455 0.0491 14.72 0.00 0.00 0.00 0.00 0.00 14.72 1183.99 0.08 419.67 0.20 0.00 0.00 3:05 1 0.45 0.56 0.41 0.0455 0.0491 14.72 0.00 0.00 0.00 0.00 0.00 14.72 1187.82 0.08 434.31 0.21 0.00 0.00 3:10 1.1 0.50 0.56 0.45 0.0500 0.0540 16.19 0.00 0.00 0.00 0.00 0.00 16.19 1191.65 0.08 450.42 0.22 0.00 0.00 3:15 1.1 0.50 0.56 0.45 0.0500 0.0540 16.19 0.00 0.00 0.00 0.00 0.00 16.19 1195.87 0.08 466.53 0.23 0.00 0.00 3:20 1.1 0.50 0.56 0.45 0.0500 0.0540 16.19 0.00 0.00 0.00 0.00 0.00 16.19 1200.08 0.08 482.64 0.23 0.00 0.00 3:25 1.2 0.55 0.56 0.49 0.0546 0.0589 17.66 0.00 0.00 0.00 0.00 0.00 17.66 1204.30 0.08 500.22 0.24 0.00 0.00 3:30 1.3 0.59 0.56 0.53 0.0591 0.0638 19.14 0.00 0.00 0.00 0.00 0.00 19.14 1208.90 0.08 519.27 0.25 0.00 0.00 3:35 1.4 0.64 0.56 N/A 0.0739 0.0797 23.91 0.00 0.00 0.00 0.00 0.00 23.91 1213.89 0.08 543.10 0.26 0.00 0.00 3:40 1.4 0.64 0.56 N/A 0.0739 0.0797 23.91 0.00 0.00 0.00 0.00 0.00 23.91 1220.12 0.08 566.92 0.28 0.00 0.00 3:45 1.5 0.68 0.56 N/A 0.1194 0.1288 38.63 0.00 0.00 0.00 0.00 0.00 38.63 1226.36 0.09 605.47 0.29 0.00 0.00 3:50 1.5 0.68 0.56 N/A 0.1194 0.1288 38.63 0.00 0.00 0.00 0.00 0.00 38.63 1236.44 0.09 644.02 0.31 0.00 0.00 3:55 1.6 0.73 0.56 N/A 0.1648 0.1778 53.35 0.00 0.00 0.00 0.00 0.00 53.35 1246.53 0.09 697.29 0.34 0.00 0.00 4:00 1.6 0.73 0.56 N/A 0.1648 0.1778 53.35 0.00 0.00 0.00 0.00 0.00 53.35 1260.47 0.09 750.55 0.36 0.00 0.00 4:05 1.7 0.77 0.56 N/A 0.2103 0.2269 68.07 0.00 0.00 0.00 0.00 0.00 68.07 1274.41 0.09 818.54 0.40 0.00 0.00 4:10 1.8 0.82 0.56 N/A 0.2558 0.2760 82.79 0.00 0.00 0.00 0.00 0.00 82.79 1292.20 0.09 901.24 0.44 0.00 0.00 4:15 1.9 0.86 0.56 N/A 0.3013 0.3251 97.52 0.00 0.00 0.00 0.00 0.00 97.52 1313.84 0.09 998.67 0.48 0.00 0.00 418

5 of 6
24 Hour Storm in 15 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:15 0.2 0.04 0.99 0.04 0.0040 0.0044 3.92 0.00 0.00 0.00 0.00 0.00 3.92 1078.00 0.22 3.70 0.00 0.00 0.00 0:30 0.3 0.06 0.98 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1078.97 0.22 9.36 0.00 0.00 0.00 0:45 0.3 0.06 0.97 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1080.45 0.23 15.02 0.01 0.00 0.00 1:00 0.4 0.08 0.95 0.07 0.0081 0.0087 7.85 0.00 0.00 0.00 0.00 0.00 7.85 1081.93 0.23 22.64 0.01 0.00 0.00 1:15 0.3 0.06 0.94 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1083.92 0.23 28.30 0.01 0.00 0.00 1:30 0.3 0.06 0.93 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1085.40 0.23 33.95 0.02 0.00 0.00 1:45 0.3 0.06 0.92 0.05 0.0061 0.0065 5.88 0.00 0.00 0.00 0.00 0.00 5.88 1086.89 0.23 39.61 0.02 0.00 0.00 2:00 0.4 0.08 0.91 0.07 0.0081 0.0087 7.85 0.00 0.00 0.00 0.00 0.00 7.85 1088.37 0.23 47.23 0.02 0.00 0.00 2:15 0.4 0.08 0.90 0.07 0.0081 0.0087 7.85 0.00 0.00 0.00 0.00 0.00 7.85 1090.36 0.23 54.85 0.03 0.00 0.00 2:30 0.4 0.08 0.89 0.07 0.0081 0.0087 7.85 0.00 0.00 0.00 0.00 0.00 7.85 1092.35 0.23 62.47 0.03 0.00 0.00 2:45 0.5 0.10 0.88 0.09 0.0101 0.0109 9.81 0.00 0.00 0.00 0.00 0.00 9.81 1094.35 0.23 72.05 0.03 0.00 0.00 3:00 0.5 0.10 0.87 0.09 0.0101 0.0109 9.81 0.00 0.00 0.00 0.00 0.00 9.81 1096.85 0.23 81.63 0.04 0.00 0.00 3:15 0.5 0.10 0.85 0.09 0.0101 0.0109 9.81 0.00 0.00 0.00 0.00 0.00 9.81 1099.36 0.23 91.21 0.04 0.00 0.00 3:30 0.5 0.10 0.84 0.09 0.0101 0.0109 9.81 0.00 0.00 0.00 0.00 0.00 9.81 1101.87 0.23 100.78 0.05 0.00 0.00 3:45 0.5 0.10 0.83 0.09 0.0101 0.0109 9.81 0.00 0.00 0.00 0.00 0.00 9.81 1104.37 0.23 110.36 0.05 0.00 0.00 4:00 0.6 0.12 0.82 0.11 0.0121 0.0131 11.77 0.00 0.00 0.00 0.00 0.00 11.77 1106.88 0.23 121.90 0.06 0.00 0.00 4:15 0.6 0.12 0.81 0.11 0.0121 0.0131 11.77 0.00 0.00 0.00 0.00 0.00 11.77 1109.90 0.23 133.44 0.06 0.00 0.00 4:30 0.7 0.14 0.80 0.13 0.0141 0.0153 13.73 0.00 0.00 0.00 0.00 0.00 13.73 1112.92 0.23 146.93 0.07 0.00 0.00 4:45 0.7 0.14 0.79 0.13 0.0141 0.0153 13.73 0.00 0.00 0.00 0.00 0.00 13.73 1116.45 0.23 160.43 0.08 0.00 0.00 5:00 0.8 0.16 0.78 0.15 0.0162 0.0174 15.69 0.00 0.00 0.00 0.00 0.00 15.69 1119.98 0.23 175.89 0.09 0.00 0.00 5:15 0.6 0.12 0.77 0.11 0.0121 0.0131 11.77 0.00 0.00 0.00 0.00 0.00 11.77 1124.03 0.23 187.43 0.09 0.00 0.00 5:30 0.7 0.14 0.76 0.13 0.0141 0.0153 13.73 0.00 0.00 0.00 0.00 0.00 13.73 1127.05 0.23 200.92 0.10 0.00 0.00 5:45 0.8 0.16 0.75 0.15 0.0162 0.0174 15.69 0.00 0.00 0.00 0.00 0.00 15.69 1130.58 0.24 216.38 0.11 0.00 0.00 6:00 0.8 0.16 0.74 0.15 0.0162 0.0174 15.69 0.00 0.00 0.00 0.00 0.00 15.69 1134.62 0.24 231.83 0.11 0.00 0.00 6:15 0.9 0.18 0.73 0.16 0.0182 0.0196 17.65 0.00 0.00 0.00 0.00 0.00 17.65 1138.67 0.24 249.25 0.12 0.00 0.00 6:30 0.9 0.18 0.72 0.16 0.0182 0.0196 17.65 0.00 0.00 0.00 0.00 0.00 17.65 1143.22 0.24 266.66 0.13 0.00 0.00 6:45 1 0.20 0.71 0.18 0.0202 0.0218 19.61 0.00 0.00 0.00 0.00 0.00 19.61 1147.78 0.24 286.04 0.14 0.00 0.00 7:00 1 0.20 0.70 0.18 0.0202 0.0218 19.61 0.00 0.00 0.00 0.00 0.00 19.61 1152.85 0.24 305.41 0.15 0.00 0.00 7:15 1 0.20 0.69 0.18 0.0202 0.0218 19.61 0.00 0.00 0.00 0.00 0.00 19.61 1157.92 0.24 324.79 0.16 0.00 0.00 7:30 1.1 0.22 0.68 0.20 0.0222 0.0240 21.58 0.00 0.00 0.00 0.00 0.00 21.58 1162.99 0.24 346.12 0.17 0.00 0.00 7:45 1.2 0.24 0.67 0.22 0.0242 0.0262 23.54 0.00 0.00 0.00 0.00 0.00 23.54 1168.58 0.24 369.42 0.18 0.00 0.00 8:00 1.3 0.26 0.66 0.24 0.0263 0.0283 25.50 0.00 0.00 0.00 0.00 0.00 25.50 1174.67 0.24 394.67 0.19 0.00 0.00 8:15 1.5 0.30 0.66 0.27 0.0303 0.0327 29.42 0.00 0.00 0.00 0.00 0.00 29.42 1181.28 0.25 423.85 0.21 0.00 0.00 8:30 1.5 0.30 0.65 0.27 0.0303 0.0327 29.42 0.00 0.00 0.00 0.00 0.00 29.42 1188.91 0.25 453.02 0.22 0.00 0.00 8:45 1.6 0.32 0.64 0.29 0.0323 0.0349 31.38 0.00 0.00 0.00 0.00 0.00 31.38 1196.55 0.25 484.15 0.24 0.00 0.00 9:00 1.7 0.34 0.63 0.31 0.0343 0.0370 33.34 0.00 0.00 0.00 0.00 0.00 33.34 1204.70 0.25 517.25 0.25 0.00 0.00 9:15 1.9 0.38 0.62 0.35 0.0384 0.0414 37.27 0.00 0.00 0.00 0.00 0.00 37.27 1213.36 0.25 554.26 0.27 0.00 0.00 9:30 2 0.40 0.61 0.36 0.0404 0.0436 39.23 0.00 0.00 0.00 0.00 0.00 39.23 1223.04 0.25 593.24 0.29 0.00 0.00 9:45 2.1 0.42 0.60 0.38 0.0424 0.0458 41.19 0.00 0.00 0.00 0.00 0.00 41.19 1233.24 0.26 634.17 0.31 0.00 0.00 10:00 2.2 0.44 0.59 0.40 0.0444 0.0479 43.15 0.00 0.00 0.00 0.00 0.00 43.15 1243.95 0.26 677.07 0.33 0.00 0.00 10:15 1.5 0.30 0.58 0.27 0.0303 0.0327 29.42 0.00 0.00 0.00 0.00 0.00 29.42 1255.18 0.26 706.23 0.34 0.00 0.00 10:30 1.5 0.30 0.58 0.27 0.0303 0.0327 29.42 0.00 0.00 0.00 0.00 0.00 29.42 1262.81 0.26 735.38 0.36 0.00 0.00 10:45 2 0.40 0.57 0.36 0.0404 0.0436 39.23 0.00 0.00 0.00 0.00 0.00 39.23 1270.44 0.26 774.35 0.38 0.00 0.00 11:00 2 0.40 0.56 0.36 0.0404 0.0436 39.23 0.00 0.00 0.00 0.00 0.00 39.23 1280.64 0.27 813.31 0.39 0.00 0.00 11:15 1.9 0.38 0.55 0.35 0.0384 0.0414 37.27 0.00 0.00 0.00 0.00 0.00 37.27 1290.83 0.27 850.31 0.41 0.00 0.00 11:30 1.9 0.38 0.54 0.35 0.0384 0.0414 37.27 0.00 0.00 0.00 0.00 0.00 37.27 1300.51 0.27 887.31 0.43 0.00 0.00 11:45 1.7 0.34 0.53 0.31 0.0343 0.0370 33.34 0.00 0.00 0.00 0.00 0.00 33.34 1310.20 0.27 920.38 0.45 0.00 0.00 12:00 1.8 0.36 0.53 0.33 0.0364 0.0392 35.31 0.00 0.00 0.00 0.00 0.00 35.31 1318.85 0.27 955.41 0.46 0.00 0.00 12:15 2.5 0.51 0.52 0.45 0.0505 0.0545 49.04 0.00 0.00 0.00 0.00 0.00 49.04 1328.02 0.28 1004.17 0.49 0.00 0.00 12:30 2.6 0.53 0.51 0.47 0.0525 0.0567 51.00 0.00 0.00 0.00 0.00 0.00 51.00 1340.78 0.28 1054.89 0.51 0.00 0.00 12:45 2.8 0.57 0.50 N/A 0.0622 0.0671 60.43 0.00 0.00 0.00 0.00 0.00 60.43 1354.05 0.28 1115.04 0.54 0.00 0.00 420

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HYDROLOGY CALCULATIONS - program updated 4-14-22 LC
Using the RCFC&WCD Short Cut Unit Hydrograph Method
Area Designations Area 1 VERSION 2 Area=0.41ac+0.09ac typ street frontage=0.50ac

1.14 5/7/2024 LOT 10-FRONT
Drainage Area (ac.)0.5000 JOB NUMBER 22106
Unit time (minutes)5 5 5 15
100 Year Storm Duration (hrs)1 3 6 24
Total Precipitation (Plates D-4.4,E-5.2, 5.4, 5.6)(in.)2.41 3.10 3.79 5.05 from NOAA interactive website Soils Group A
AMC index II Runoff Number (plate E-6.1)32
Plate E-6.2 Pervious Area Loss Rate (Fp)(in/hr)0.74 (AMC II) Percentage of Impervious Cover (Ai)(%) (plate E-6.3)26.6 20% per the RCFC Hydrology Manual 1AC LOT-PLATE D 5.6 AND 0.09AC TYPICAL STREET FRONTAGE Weighted Average Loss Rate (F=Fp(1-.9Ai))(in./hr.)0.56 (used for 1, 3, and 6 hour storm, the 24 hour storm uses variable maximum loss rate per plate E-1.1 (3 of 6)) Low Loss Rate Percent (%) 90
Retention Basin Percolation Rate (in/hr)0.01 (also used for drywell percolation rate) Percolation is taken incrementally.

Drywell design factors Upper sec. (ft.)=0.001 Lower sec. (ft.)=0.001 Ring diam. (ft.) =0.001 Drywell lower max. (cf)=0.00 Upper max.(cf)=0.00 Gravel bed width around drywell=0.001 Drywell total(cf)=0.00 Ret. Basin design (area, depth) Top =2118 s.f.Bot. =756 s.f.Max. Depth (d)=3 Max. storage=4139.39 (d/3)*(bottom+top+(bottom*top)^0.50) Formulas vol=(h/3)*(bottom+top+(bottom*top)^0.50) area=bottom+(h/d)*(top-bottom)h=(vol*3)/(bottom+top+(bottom*top)^0.5)(values must be non-zero or error occurs) Outside input from:N/A 3.25
1 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 3.7 1.0700 0.5628 N/A 0.5072 0.2557 76.71 0.00 0.00 0.00 0.00 0.00 76.71 756.00 0.05 76.66 0.06 0.00 0.00 0:10 4.8 1.3882 0.5628 N/A 0.8253 0.4161 124.83 0.00 0.00 0.00 0.00 0.00 124.83 781.22 0.05 201.44 0.15 0.00 0.00 0:15 5.1 1.4749 0.5628 N/A 0.9121 0.4598 137.95 0.00 0.00 0.00 0.00 0.00 137.95 822.28 0.06 339.33 0.25 0.00 0.00 0:20 4.9 1.4171 0.5628 N/A 0.8542 0.4307 129.20 0.00 0.00 0.00 0.00 0.00 129.20 867.65 0.06 468.47 0.34 0.00 0.00 0:25 6.6 1.9087 0.5628 N/A 1.3459 0.6785 203.56 0.00 0.00 0.00 0.00 0.00 203.56 910.14 0.06 671.97 0.49 0.00 0.00 0:30 7.3 2.1112 0.5628 N/A 1.5483 0.7806 234.18 0.00 0.00 0.00 0.00 0.00 234.18 977.10 0.07 906.09 0.66 0.00 0.00 0:35 8.4 2.4293 0.5628 N/A 1.8664 0.9410 282.30 0.00 0.00 0.00 0.00 0.00 282.30 1054.13 0.07 1188.31 0.86 0.00 0.00 0:40 9 2.6028 0.5628 N/A 2.0400 1.0285 308.54 0.00 0.00 0.00 0.00 0.00 308.54 1147.00 0.08 1496.78 1.08 0.00 0.00 0:45 12.3 3.5572 0.5628 N/A 2.9943 1.5096 452.89 0.00 0.00 0.00 0.00 0.00 452.89 1248.49 0.09 1949.58 1.41 0.00 0.00 0:50 17.6 5.0899 0.5628 N/A 4.5271 2.2824 684.72 0.00 0.00 0.00 0.00 0.00 684.72 1397.48 0.10 2634.20 1.91 0.00 0.00 0:55 16.1 4.6561 0.5628 N/A 4.0933 2.0637 619.11 0.00 0.00 0.00 0.00 0.00 619.11 1622.74 0.11 3253.20 2.36 0.00 0.00 1:00 4.2 1.2146 0.5628 N/A 0.6518 0.3286 98.58 0.00 0.00 0.00 0.00 0.00 98.58 1826.41 0.13 3351.66 2.43 0.00 0.00 MAX DEPTH 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1858.81 0.13 3351.53 2.43 0.00 0.00 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1858.77 0.13 3351.40 2.43 0.00 0.00 1:15 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1858.72 0.13 3351.27 2.43 0.00 0.00 Total volume (cf)3352.59 Total Overflow (cf)0.00
422
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3 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 1.3 0.48 0.56 0.44 0.0484 0.0244 7.31 0.00 0.00 0.00 0.00 0.00 7.31 756.00 0.05 7.26 0.01 0.00 0.00 0:10 1.3 0.48 0.56 0.44 0.0484 0.0244 7.31 0.00 0.00 0.00 0.00 0.00 7.31 758.39 0.05 14.52 0.01 0.00 0.00 0:15 1.1 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 760.78 0.05 20.66 0.01 0.00 0.00 0:20 1.5 0.56 0.56 0.50 0.0558 0.0281 8.44 0.00 0.00 0.00 0.00 0.00 8.44 762.80 0.05 29.05 0.02 0.00 0.00 0:25 1.5 0.56 0.56 0.50 0.0558 0.0281 8.44 0.00 0.00 0.00 0.00 0.00 8.44 765.56 0.05 37.43 0.03 0.00 0.00 0:30 1.8 0.67 0.56 N/A 0.1068 0.0538 16.15 0.00 0.00 0.00 0.00 0.00 16.15 768.32 0.05 53.53 0.04 0.00 0.00 0:35 1.5 0.56 0.56 0.50 0.0558 0.0281 8.44 0.00 0.00 0.00 0.00 0.00 8.44 773.61 0.05 61.91 0.04 0.00 0.00 0:40 1.8 0.67 0.56 N/A 0.1068 0.0538 16.15 0.00 0.00 0.00 0.00 0.00 16.15 776.37 0.05 78.01 0.06 0.00 0.00 0:45 1.8 0.67 0.56 N/A 0.1068 0.0538 16.15 0.00 0.00 0.00 0.00 0.00 16.15 781.67 0.05 94.10 0.07 0.00 0.00 0:50 1.5 0.56 0.56 0.50 0.0558 0.0281 8.44 0.00 0.00 0.00 0.00 0.00 8.44 786.96 0.05 102.48 0.07 0.00 0.00 0:55 1.6 0.60 0.56 0.54 0.0595 0.0300 9.00 0.00 0.00 0.00 0.00 0.00 9.00 789.72 0.05 111.43 0.08 0.00 0.00 1:00 1.8 0.67 0.56 N/A 0.1068 0.0538 16.15 0.00 0.00 0.00 0.00 0.00 16.15 792.66 0.06 127.52 0.09 0.00 0.00 1:05 2.2 0.82 0.56 N/A 0.2556 0.1288 38.65 0.00 0.00 0.00 0.00 0.00 38.65 797.96 0.06 166.12 0.12 0.00 0.00 1:10 2.2 0.82 0.56 N/A 0.2556 0.1288 38.65 0.00 0.00 0.00 0.00 0.00 38.65 810.66 0.06 204.72 0.15 0.00 0.00 1:15 2.2 0.82 0.56 N/A 0.2556 0.1288 38.65 0.00 0.00 0.00 0.00 0.00 38.65 823.36 0.06 243.31 0.18 0.00 0.00 1:20 2 0.74 0.56 N/A 0.1812 0.0913 27.40 0.00 0.00 0.00 0.00 0.00 27.40 836.06 0.06 270.65 0.20 0.00 0.00 1:25 2.6 0.97 0.56 N/A 0.4044 0.2039 61.16 0.00 0.00 0.00 0.00 0.00 61.16 845.05 0.06 331.75 0.24 0.00 0.00 1:30 2.7 1.00 0.56 N/A 0.4416 0.2226 66.79 0.00 0.00 0.00 0.00 0.00 66.79 865.16 0.06 398.48 0.29 0.00 0.00 1:35 2.4 0.89 0.56 N/A 0.3300 0.1664 49.91 0.00 0.00 0.00 0.00 0.00 49.91 887.11 0.06 448.32 0.32 0.00 0.00 1:40 2.7 1.00 0.56 N/A 0.4416 0.2226 66.79 0.00 0.00 0.00 0.00 0.00 66.79 903.51 0.06 515.05 0.37 0.00 0.00 1:45 3.3 1.23 0.56 N/A 0.6648 0.3351 100.54 0.00 0.00 0.00 0.00 0.00 100.54 925.47 0.06 615.53 0.45 0.00 0.00 1:50 3.1 1.15 0.56 N/A 0.5904 0.2976 89.29 0.00 0.00 0.00 0.00 0.00 89.29 958.53 0.07 704.75 0.51 0.00 0.00 1:55 2.9 1.08 0.56 N/A 0.5160 0.2601 78.04 0.00 0.00 0.00 0.00 0.00 78.04 987.89 0.07 782.72 0.57 0.00 0.00 2:00 3 1.12 0.56 N/A 0.5532 0.2789 83.66 0.00 0.00 0.00 0.00 0.00 83.66 1013.54 0.07 866.32 0.63 0.00 0.00 2:05 3.1 1.15 0.56 N/A 0.5904 0.2976 89.29 0.00 0.00 0.00 0.00 0.00 89.29 1041.05 0.07 955.53 0.69 0.00 0.00 2:10 4.2 1.56 0.56 N/A 0.9996 0.5039 151.18 0.00 0.00 0.00 0.00 0.00 151.18 1070.40 0.07 1106.64 0.80 0.00 0.00 2:15 5 1.86 0.56 N/A 1.2972 0.6540 196.19 0.00 0.00 0.00 0.00 0.00 196.19 1120.12 0.08 1302.76 0.94 0.00 0.00 2:20 3.5 1.30 0.56 N/A 0.7392 0.3727 111.80 0.00 0.00 0.00 0.00 0.00 111.80 1184.65 0.08 1414.48 1.03 0.00 0.00 2:25 6.8 2.53 0.56 N/A 1.9668 0.9916 297.47 0.00 0.00 0.00 0.00 0.00 297.47 1221.41 0.08 1711.86 1.24 0.00 0.00 2:30 7.3 2.72 0.56 N/A 2.1528 1.0853 325.60 0.00 0.00 0.00 0.00 0.00 325.60 1319.26 0.09 2037.38 1.48 0.00 0.00 2:35 8.2 3.05 0.56 N/A 2.4876 1.2541 376.24 0.00 0.00 0.00 0.00 0.00 376.24 1426.37 0.10 2413.52 1.75 0.00 0.00 2:40 5.9 2.19 0.56 N/A 1.6320 0.8228 246.83 0.00 0.00 0.00 0.00 0.00 246.83 1550.13 0.11 2660.24 1.93 0.00 0.00 2:45 2 0.74 0.56 N/A 0.1812 0.0913 27.40 0.00 0.00 0.00 0.00 0.00 27.40 1631.31 0.11 2687.53 1.95 0.00 0.00 2:50 1.8 0.67 0.56 N/A 0.1068 0.0538 16.15 0.00 0.00 0.00 0.00 0.00 16.15 1640.29 0.11 2703.56 1.96 0.00 0.00 2:55 1.8 0.67 0.56 N/A 0.1068 0.0538 16.15 0.00 0.00 0.00 0.00 0.00 16.15 1645.56 0.11 2719.60 1.97 0.00 0.00 3:00 0.6 0.22 0.56 0.20 0.0223 0.0113 3.38 0.00 0.00 0.00 0.00 0.00 3.38 1650.84 0.11 2722.86 1.97 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.91 0.11 2722.74 1.97 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.88 0.11 2722.63 1.97 0.00 0.00 3:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.84 0.11 2722.51 1.97 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.80 0.11 2722.40 1.97 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.76 0.11 2722.28 1.97 0.00 0.00 3:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.72 0.11 2722.17 1.97 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.69 0.11 2722.05 1.97 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.65 0.11 2721.94 1.97 0.00 0.00 Total volume (cf)2725.39 Total Overflow (cf)0.00
423

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6 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 0.5 0.23 0.56 0.20 0.0227 0.0115 3.44 0.00 0.00 0.00 0.00 0.00 3.44 756.00 0.05 3.39 0.00 0.00 0.00 0:10 0.6 0.27 0.56 0.25 0.0273 0.0138 4.13 0.00 0.00 0.00 0.00 0.00 4.13 757.11 0.05 7.46 0.01 0.00 0.00 0:15 0.6 0.27 0.56 0.25 0.0273 0.0138 4.13 0.00 0.00 0.00 0.00 0.00 4.13 758.46 0.05 11.54 0.01 0.00 0.00 0:20 0.6 0.27 0.56 0.25 0.0273 0.0138 4.13 0.00 0.00 0.00 0.00 0.00 4.13 759.80 0.05 15.61 0.01 0.00 0.00 0:25 0.6 0.27 0.56 0.25 0.0273 0.0138 4.13 0.00 0.00 0.00 0.00 0.00 4.13 761.14 0.05 19.69 0.01 0.00 0.00 0:30 0.7 0.32 0.56 0.29 0.0318 0.0161 4.82 0.00 0.00 0.00 0.00 0.00 4.82 762.48 0.05 24.45 0.02 0.00 0.00 0:35 0.7 0.32 0.56 0.29 0.0318 0.0161 4.82 0.00 0.00 0.00 0.00 0.00 4.82 764.04 0.05 29.21 0.02 0.00 0.00 0:40 0.7 0.32 0.56 0.29 0.0318 0.0161 4.82 0.00 0.00 0.00 0.00 0.00 4.82 765.61 0.05 33.97 0.02 0.00 0.00 0:45 0.7 0.32 0.56 0.29 0.0318 0.0161 4.82 0.00 0.00 0.00 0.00 0.00 4.82 767.18 0.05 38.73 0.03 0.00 0.00 0:50 0.7 0.32 0.56 0.29 0.0318 0.0161 4.82 0.00 0.00 0.00 0.00 0.00 4.82 768.74 0.05 43.50 0.03 0.00 0.00 0:55 0.7 0.32 0.56 0.29 0.0318 0.0161 4.82 0.00 0.00 0.00 0.00 0.00 4.82 770.31 0.05 48.26 0.03 0.00 0.00 1:00 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 771.88 0.05 53.71 0.04 0.00 0.00 1:05 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 773.67 0.05 59.16 0.04 0.00 0.00 1:10 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 775.46 0.05 64.61 0.05 0.00 0.00 1:15 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 777.26 0.05 70.05 0.05 0.00 0.00 1:20 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 779.05 0.05 75.50 0.05 0.00 0.00 1:25 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 780.84 0.05 80.95 0.06 0.00 0.00 1:30 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 782.64 0.05 86.40 0.06 0.00 0.00 1:35 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 784.43 0.05 91.85 0.07 0.00 0.00 1:40 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 786.22 0.05 97.30 0.07 0.00 0.00 1:45 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 788.01 0.05 102.75 0.07 0.00 0.00 1:50 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 789.81 0.05 108.19 0.08 0.00 0.00 1:55 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 791.60 0.05 113.64 0.08 0.00 0.00 2:00 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 793.39 0.06 119.78 0.09 0.00 0.00 2:05 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 795.41 0.06 125.23 0.09 0.00 0.00 2:10 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 797.20 0.06 131.36 0.10 0.00 0.00 2:15 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 799.22 0.06 137.50 0.10 0.00 0.00 2:20 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 801.24 0.06 143.63 0.10 0.00 0.00 2:25 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 803.26 0.06 149.77 0.11 0.00 0.00 2:30 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 805.28 0.06 155.90 0.11 0.00 0.00 2:35 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 807.30 0.06 162.04 0.12 0.00 0.00 2:40 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 809.32 0.06 168.17 0.12 0.00 0.00 2:45 1 0.45 0.56 0.41 0.0455 0.0229 6.88 0.00 0.00 0.00 0.00 0.00 6.88 811.33 0.06 175.00 0.13 0.00 0.00 2:50 1 0.45 0.56 0.41 0.0455 0.0229 6.88 0.00 0.00 0.00 0.00 0.00 6.88 813.58 0.06 181.82 0.13 0.00 0.00 2:55 1 0.45 0.56 0.41 0.0455 0.0229 6.88 0.00 0.00 0.00 0.00 0.00 6.88 815.82 0.06 188.64 0.14 0.00 0.00 3:00 1 0.45 0.56 0.41 0.0455 0.0229 6.88 0.00 0.00 0.00 0.00 0.00 6.88 818.07 0.06 195.46 0.14 0.00 0.00 3:05 1 0.45 0.56 0.41 0.0455 0.0229 6.88 0.00 0.00 0.00 0.00 0.00 6.88 820.31 0.06 202.28 0.15 0.00 0.00 3:10 1.1 0.50 0.56 0.45 0.0500 0.0252 7.57 0.00 0.00 0.00 0.00 0.00 7.57 822.56 0.06 209.79 0.15 0.00 0.00 3:15 1.1 0.50 0.56 0.45 0.0500 0.0252 7.57 0.00 0.00 0.00 0.00 0.00 7.57 825.03 0.06 217.30 0.16 0.00 0.00 3:20 1.1 0.50 0.56 0.45 0.0500 0.0252 7.57 0.00 0.00 0.00 0.00 0.00 7.57 827.50 0.06 224.81 0.16 0.00 0.00 3:25 1.2 0.55 0.56 0.49 0.0546 0.0275 8.25 0.00 0.00 0.00 0.00 0.00 8.25 829.97 0.06 233.01 0.17 0.00 0.00 3:30 1.3 0.59 0.56 0.53 0.0591 0.0298 8.94 0.00 0.00 0.00 0.00 0.00 8.94 832.67 0.06 241.89 0.18 0.00 0.00 3:35 1.4 0.64 0.56 N/A 0.0739 0.0372 11.17 0.00 0.00 0.00 0.00 0.00 11.17 835.59 0.06 253.01 0.18 0.00 0.00 3:40 1.4 0.64 0.56 N/A 0.0739 0.0372 11.17 0.00 0.00 0.00 0.00 0.00 11.17 839.25 0.06 264.12 0.19 0.00 0.00 3:45 1.5 0.68 0.56 N/A 0.1194 0.0602 18.05 0.00 0.00 0.00 0.00 0.00 18.05 842.91 0.06 282.12 0.20 0.00 0.00 3:50 1.5 0.68 0.56 N/A 0.1194 0.0602 18.05 0.00 0.00 0.00 0.00 0.00 18.05 848.83 0.06 300.11 0.22 0.00 0.00 3:55 1.6 0.73 0.56 N/A 0.1648 0.0831 24.93 0.00 0.00 0.00 0.00 0.00 24.93 854.75 0.06 324.98 0.24 0.00 0.00 4:00 1.6 0.73 0.56 N/A 0.1648 0.0831 24.93 0.00 0.00 0.00 0.00 0.00 24.93 862.93 0.06 349.86 0.25 0.00 0.00 4:05 1.7 0.77 0.56 N/A 0.2103 0.1060 31.81 0.00 0.00 0.00 0.00 0.00 31.81 871.11 0.06 381.61 0.28 0.00 0.00 4:10 1.8 0.82 0.56 N/A 0.2558 0.1290 38.69 0.00 0.00 0.00 0.00 0.00 38.69 881.56 0.06 420.23 0.30 0.00 0.00 4:15 1.9 0.86 0.56 N/A 0.3013 0.1519 45.57 0.00 0.00 0.00 0.00 0.00 45.57 894.27 0.06 465.74 0.34 0.00 0.00 424

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4:20 2 0.91 0.56 N/A 0.3468 0.1748 52.45 0.00 0.00 0.00 0.00 0.00 52.45 909.24 0.06 518.12 0.38 0.00 0.00 4:25 2.1 0.96 0.56 N/A 0.3922 0.1978 59.33 0.00 0.00 0.00 0.00 0.00 59.33 926.48 0.06 577.38 0.42 0.00 0.00 4:30 2.1 0.96 0.56 N/A 0.3922 0.1978 59.33 0.00 0.00 0.00 0.00 0.00 59.33 945.98 0.07 636.64 0.46 0.00 0.00 4:35 2.2 1.00 0.56 N/A 0.4377 0.2207 66.20 0.00 0.00 0.00 0.00 0.00 66.20 965.48 0.07 702.78 0.51 0.00 0.00 4:40 2.3 1.05 0.56 N/A 0.4832 0.2436 73.08 0.00 0.00 0.00 0.00 0.00 73.08 987.24 0.07 775.80 0.56 0.00 0.00 4:45 2.4 1.09 0.56 N/A 0.5287 0.2665 79.96 0.00 0.00 0.00 0.00 0.00 79.96 1011.26 0.07 855.69 0.62 0.00 0.00 4:50 2.4 1.09 0.56 N/A 0.5287 0.2665 79.96 0.00 0.00 0.00 0.00 0.00 79.96 1037.55 0.07 935.58 0.68 0.00 0.00 4:55 2.5 1.14 0.56 N/A 0.5742 0.2895 86.84 0.00 0.00 0.00 0.00 0.00 86.84 1063.84 0.07 1022.35 0.74 0.00 0.00 5:00 2.6 1.18 0.56 N/A 0.6196 0.3124 93.72 0.00 0.00 0.00 0.00 0.00 93.72 1092.39 0.08 1115.99 0.81 0.00 0.00 5:05 3.1 1.41 0.56 N/A 0.8470 0.4270 128.11 0.00 0.00 0.00 0.00 0.00 128.11 1123.20 0.08 1244.03 0.90 0.00 0.00 5:10 3.6 1.64 0.56 N/A 1.0744 0.5417 162.51 0.00 0.00 0.00 0.00 0.00 162.51 1165.33 0.08 1406.45 1.02 0.00 0.00 5:15 3.9 1.77 0.56 N/A 1.2109 0.6105 183.14 0.00 0.00 0.00 0.00 0.00 183.14 1218.77 0.08 1589.51 1.15 0.00 0.00 5:20 4.2 1.91 0.56 N/A 1.3473 0.6793 203.78 0.00 0.00 0.00 0.00 0.00 203.78 1279.00 0.09 1793.21 1.30 0.00 0.00 5:25 4.7 2.14 0.56 N/A 1.5747 0.7939 238.18 0.00 0.00 0.00 0.00 0.00 238.18 1346.03 0.09 2031.29 1.47 0.00 0.00 5:30 5.6 2.55 0.56 N/A 1.9840 1.0003 300.09 0.00 0.00 0.00 0.00 0.00 300.09 1424.36 0.10 2331.28 1.69 0.00 0.00 5:35 1.9 0.86 0.56 N/A 0.3013 0.1519 45.57 0.00 0.00 0.00 0.00 0.00 45.57 1523.07 0.11 2376.74 1.72 0.00 0.00 5:40 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 1538.03 0.11 2382.82 1.73 0.00 0.00 5:45 0.6 0.27 0.56 0.25 0.0273 0.0138 4.13 0.00 0.00 0.00 0.00 0.00 4.13 1540.03 0.11 2386.84 1.73 0.00 0.00 5:50 0.5 0.23 0.56 0.20 0.0227 0.0115 3.44 0.00 0.00 0.00 0.00 0.00 3.44 1541.35 0.11 2390.18 1.73 0.00 0.00 5:55 0.3 0.14 0.56 0.12 0.0136 0.0069 2.06 0.00 0.00 0.00 0.00 0.00 2.06 1542.45 0.11 2392.13 1.73 0.00 0.00 6:00 0.2 0.09 0.56 0.08 0.0091 0.0046 1.38 0.00 0.00 0.00 0.00 0.00 1.38 1543.09 0.11 2393.40 1.73 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1543.51 0.11 2393.29 1.73 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1543.48 0.11 2393.19 1.73 0.00 0.00 6:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1543.44 0.11 2393.08 1.73 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1543.40 0.11 2392.97 1.73 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1543.37 0.11 2392.86 1.73 0.00 0.00 6:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1543.33 0.11 2392.76 1.73 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1543.30 0.11 2392.65 1.73 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1543.26 0.11 2392.54 1.73 0.00 0.00 6:45 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1543.23 0.11 2392.44 1.73 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1543.19 0.11 2392.33 1.73 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1543.16 0.11 2392.22 1.73 0.00 0.00 7:00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1543.12 0.11 2392.11 1.73 0.00 0.00 Total volume (cf)2398.03 Total Overflow (cf)0.00
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24 Hour Storm in 15 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:15 0.2 0.04 0.99 0.04 0.0040 0.0020 1.83 0.00 0.00 0.00 0.00 0.00 1.83 756.00 0.16 1.68 0.00 0.00 0.00 0:30 0.3 0.06 0.98 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 756.55 0.16 4.27 0.00 0.00 0.00 0:45 0.3 0.06 0.97 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 757.40 0.16 6.86 0.00 0.00 0.00 1:00 0.4 0.08 0.95 0.07 0.0081 0.0041 3.67 0.00 0.00 0.00 0.00 0.00 3.67 758.26 0.16 10.37 0.01 0.00 0.00 1:15 0.3 0.06 0.94 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 759.41 0.16 12.96 0.01 0.00 0.00 1:30 0.3 0.06 0.93 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 760.26 0.16 15.55 0.01 0.00 0.00 1:45 0.3 0.06 0.92 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 761.12 0.16 18.14 0.01 0.00 0.00 2:00 0.4 0.08 0.91 0.07 0.0081 0.0041 3.67 0.00 0.00 0.00 0.00 0.00 3.67 761.97 0.16 21.65 0.02 0.00 0.00 2:15 0.4 0.08 0.90 0.07 0.0081 0.0041 3.67 0.00 0.00 0.00 0.00 0.00 3.67 763.12 0.16 25.16 0.02 0.00 0.00 2:30 0.4 0.08 0.89 0.07 0.0081 0.0041 3.67 0.00 0.00 0.00 0.00 0.00 3.67 764.28 0.16 28.66 0.02 0.00 0.00 2:45 0.5 0.10 0.88 0.09 0.0101 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 765.43 0.16 33.09 0.02 0.00 0.00 3:00 0.5 0.10 0.87 0.09 0.0101 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 766.89 0.16 37.51 0.03 0.00 0.00 3:15 0.5 0.10 0.85 0.09 0.0101 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 768.34 0.16 41.93 0.03 0.00 0.00 3:30 0.5 0.10 0.84 0.09 0.0101 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 769.80 0.16 46.36 0.03 0.00 0.00 3:45 0.5 0.10 0.83 0.09 0.0101 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 771.25 0.16 50.78 0.04 0.00 0.00 4:00 0.6 0.12 0.82 0.11 0.0121 0.0061 5.50 0.00 0.00 0.00 0.00 0.00 5.50 772.71 0.16 56.12 0.04 0.00 0.00 4:15 0.6 0.12 0.81 0.11 0.0121 0.0061 5.50 0.00 0.00 0.00 0.00 0.00 5.50 774.46 0.16 61.45 0.04 0.00 0.00 4:30 0.7 0.14 0.80 0.13 0.0141 0.0071 6.42 0.00 0.00 0.00 0.00 0.00 6.42 776.22 0.16 67.71 0.05 0.00 0.00 4:45 0.7 0.14 0.79 0.13 0.0141 0.0071 6.42 0.00 0.00 0.00 0.00 0.00 6.42 778.28 0.16 73.96 0.05 0.00 0.00 5:00 0.8 0.16 0.78 0.15 0.0162 0.0081 7.33 0.00 0.00 0.00 0.00 0.00 7.33 780.34 0.16 81.13 0.06 0.00 0.00 5:15 0.6 0.12 0.77 0.11 0.0121 0.0061 5.50 0.00 0.00 0.00 0.00 0.00 5.50 782.70 0.16 86.47 0.06 0.00 0.00 5:30 0.7 0.14 0.76 0.13 0.0141 0.0071 6.42 0.00 0.00 0.00 0.00 0.00 6.42 784.45 0.16 92.72 0.07 0.00 0.00 5:45 0.8 0.16 0.75 0.15 0.0162 0.0081 7.33 0.00 0.00 0.00 0.00 0.00 7.33 786.51 0.16 99.89 0.07 0.00 0.00 6:00 0.8 0.16 0.74 0.15 0.0162 0.0081 7.33 0.00 0.00 0.00 0.00 0.00 7.33 788.87 0.16 107.06 0.08 0.00 0.00 6:15 0.9 0.18 0.73 0.16 0.0182 0.0092 8.25 0.00 0.00 0.00 0.00 0.00 8.25 791.23 0.16 115.14 0.08 0.00 0.00 6:30 0.9 0.18 0.72 0.16 0.0182 0.0092 8.25 0.00 0.00 0.00 0.00 0.00 8.25 793.89 0.17 123.23 0.09 0.00 0.00 6:45 1 0.20 0.71 0.18 0.0202 0.0102 9.17 0.00 0.00 0.00 0.00 0.00 9.17 796.55 0.17 132.23 0.10 0.00 0.00 7:00 1 0.20 0.70 0.18 0.0202 0.0102 9.17 0.00 0.00 0.00 0.00 0.00 9.17 799.51 0.17 141.23 0.10 0.00 0.00 7:15 1 0.20 0.69 0.18 0.0202 0.0102 9.17 0.00 0.00 0.00 0.00 0.00 9.17 802.47 0.17 150.22 0.11 0.00 0.00 7:30 1.1 0.22 0.68 0.20 0.0222 0.0112 10.08 0.00 0.00 0.00 0.00 0.00 10.08 805.43 0.17 160.14 0.12 0.00 0.00 7:45 1.2 0.24 0.67 0.22 0.0242 0.0122 11.00 0.00 0.00 0.00 0.00 0.00 11.00 808.69 0.17 170.97 0.12 0.00 0.00 8:00 1.3 0.26 0.66 0.24 0.0263 0.0132 11.92 0.00 0.00 0.00 0.00 0.00 11.92 812.25 0.17 182.72 0.13 0.00 0.00 8:15 1.5 0.30 0.66 0.27 0.0303 0.0153 13.75 0.00 0.00 0.00 0.00 0.00 13.75 816.12 0.17 196.29 0.14 0.00 0.00 8:30 1.5 0.30 0.65 0.27 0.0303 0.0153 13.75 0.00 0.00 0.00 0.00 0.00 13.75 820.59 0.17 209.87 0.15 0.00 0.00 8:45 1.6 0.32 0.64 0.29 0.0323 0.0163 14.67 0.00 0.00 0.00 0.00 0.00 14.67 825.06 0.17 224.37 0.16 0.00 0.00 9:00 1.7 0.34 0.63 0.31 0.0343 0.0173 15.58 0.00 0.00 0.00 0.00 0.00 15.58 829.82 0.17 239.77 0.17 0.00 0.00 9:15 1.9 0.38 0.62 0.35 0.0384 0.0193 17.41 0.00 0.00 0.00 0.00 0.00 17.41 834.89 0.17 257.02 0.19 0.00 0.00 9:30 2 0.40 0.61 0.36 0.0404 0.0204 18.33 0.00 0.00 0.00 0.00 0.00 18.33 840.57 0.18 275.17 0.20 0.00 0.00 9:45 2.1 0.42 0.60 0.38 0.0424 0.0214 19.25 0.00 0.00 0.00 0.00 0.00 19.25 846.54 0.18 294.24 0.21 0.00 0.00 10:00 2.2 0.44 0.59 0.40 0.0444 0.0224 20.16 0.00 0.00 0.00 0.00 0.00 20.16 852.82 0.18 314.23 0.23 0.00 0.00 10:15 1.5 0.30 0.58 0.27 0.0303 0.0153 13.75 0.00 0.00 0.00 0.00 0.00 13.75 859.39 0.18 327.80 0.24 0.00 0.00 10:30 1.5 0.30 0.58 0.27 0.0303 0.0153 13.75 0.00 0.00 0.00 0.00 0.00 13.75 863.86 0.18 341.37 0.25 0.00 0.00 10:45 2 0.40 0.57 0.36 0.0404 0.0204 18.33 0.00 0.00 0.00 0.00 0.00 18.33 868.32 0.18 359.52 0.26 0.00 0.00 11:00 2 0.40 0.56 0.36 0.0404 0.0204 18.33 0.00 0.00 0.00 0.00 0.00 18.33 874.29 0.18 377.67 0.27 0.00 0.00 11:15 1.9 0.38 0.55 0.35 0.0384 0.0193 17.41 0.00 0.00 0.00 0.00 0.00 17.41 880.27 0.18 394.90 0.29 0.00 0.00 11:30 1.9 0.38 0.54 0.35 0.0384 0.0193 17.41 0.00 0.00 0.00 0.00 0.00 17.41 885.94 0.18 412.13 0.30 0.00 0.00 11:45 1.7 0.34 0.53 0.31 0.0343 0.0173 15.58 0.00 0.00 0.00 0.00 0.00 15.58 891.60 0.19 427.53 0.31 0.00 0.00 12:00 1.8 0.36 0.53 0.33 0.0364 0.0183 16.50 0.00 0.00 0.00 0.00 0.00 16.50 896.67 0.19 443.84 0.32 0.00 0.00 12:15 2.5 0.51 0.52 0.45 0.0505 0.0255 22.91 0.00 0.00 0.00 0.00 0.00 22.91 902.04 0.19 466.56 0.34 0.00 0.00 12:30 2.6 0.53 0.51 0.47 0.0525 0.0265 23.83 0.00 0.00 0.00 0.00 0.00 23.83 909.52 0.19 490.21 0.36 0.00 0.00 12:45 2.8 0.57 0.50 N/A 0.0622 0.0314 28.24 0.00 0.00 0.00 0.00 0.00 28.24 917.29 0.19 518.25 0.38 0.00 0.00 426

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13:00 2.9 0.59 0.50 N/A 0.0900 0.0454 40.85 0.00 0.00 0.00 0.00 0.00 40.85 926.52 0.19 558.91 0.41 0.00 0.00 13:15 3.4 0.69 0.49 N/A 0.1985 0.1001 90.08 0.00 0.00 0.00 0.00 0.00 90.08 939.90 0.20 648.80 0.47 0.00 0.00 13:30 3.4 0.69 0.48 N/A 0.2059 0.1038 93.45 0.00 0.00 0.00 0.00 0.00 93.45 969.48 0.20 742.04 0.54 0.00 0.00 13:45 2.3 0.46 0.47 0.42 0.0465 0.0234 21.08 0.00 0.00 0.00 0.00 0.00 21.08 1000.16 0.21 762.91 0.55 0.00 0.00 14:00 2.3 0.46 0.47 0.42 0.0465 0.0234 21.08 0.00 0.00 0.00 0.00 0.00 21.08 1007.02 0.21 783.78 0.57 0.00 0.00 14:15 2.7 0.55 0.46 N/A 0.0862 0.0435 39.11 0.00 0.00 0.00 0.00 0.00 39.11 1013.89 0.21 822.68 0.60 0.00 0.00 14:30 2.6 0.53 0.45 N/A 0.0730 0.0368 33.12 0.00 0.00 0.00 0.00 0.00 33.12 1026.69 0.21 855.59 0.62 0.00 0.00 14:45 2.6 0.53 0.45 N/A 0.0799 0.0403 36.26 0.00 0.00 0.00 0.00 0.00 36.26 1037.52 0.22 891.63 0.65 0.00 0.00 15:00 2.5 0.51 0.44 N/A 0.0665 0.0335 30.19 0.00 0.00 0.00 0.00 0.00 30.19 1049.38 0.22 921.60 0.67 0.00 0.00 15:15 2.4 0.48 0.43 N/A 0.0530 0.0267 24.07 0.00 0.00 0.00 0.00 0.00 24.07 1059.24 0.22 945.45 0.69 0.00 0.00 15:30 2.3 0.46 0.43 0.42 0.0465 0.0234 21.08 0.00 0.00 0.00 0.00 0.00 21.08 1067.08 0.22 966.30 0.70 0.00 0.00 15:45 1.9 0.38 0.42 0.35 0.0384 0.0193 17.41 0.00 0.00 0.00 0.00 0.00 17.41 1073.95 0.22 983.50 0.71 0.00 0.00 16:00 1.9 0.38 0.41 0.35 0.0384 0.0193 17.41 0.00 0.00 0.00 0.00 0.00 17.41 1079.60 0.22 1000.69 0.73 0.00 0.00 16:15 0.4 0.08 0.41 0.07 0.0081 0.0041 3.67 0.00 0.00 0.00 0.00 0.00 3.67 1085.26 0.23 1004.13 0.73 0.00 0.00 16:30 0.4 0.08 0.40 0.07 0.0081 0.0041 3.67 0.00 0.00 0.00 0.00 0.00 3.67 1086.39 0.23 1007.57 0.73 0.00 0.00 16:45 0.3 0.06 0.39 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 1087.52 0.23 1010.09 0.73 0.00 0.00 17:00 0.3 0.06 0.39 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 1088.35 0.23 1012.61 0.73 0.00 0.00 17:15 0.5 0.10 0.38 0.09 0.0101 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 1089.18 0.23 1016.97 0.74 0.00 0.00 17:30 0.5 0.10 0.38 0.09 0.0101 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 1090.62 0.23 1021.32 0.74 0.00 0.00 17:45 0.5 0.10 0.37 0.09 0.0101 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 1092.05 0.23 1025.68 0.74 0.00 0.00 18:00 0.4 0.08 0.37 0.07 0.0081 0.0041 3.67 0.00 0.00 0.00 0.00 0.00 3.67 1093.48 0.23 1029.12 0.75 0.00 0.00 18:15 0.4 0.08 0.36 0.07 0.0081 0.0041 3.67 0.00 0.00 0.00 0.00 0.00 3.67 1094.61 0.23 1032.56 0.75 0.00 0.00 18:30 0.4 0.08 0.35 0.07 0.0081 0.0041 3.67 0.00 0.00 0.00 0.00 0.00 3.67 1095.75 0.23 1035.99 0.75 0.00 0.00 18:45 0.3 0.06 0.35 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 1096.88 0.23 1038.51 0.75 0.00 0.00 19:00 0.2 0.04 0.34 0.04 0.0040 0.0020 1.83 0.00 0.00 0.00 0.00 0.00 1.83 1097.71 0.23 1040.12 0.75 0.00 0.00 19:15 0.3 0.06 0.34 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 1098.23 0.23 1042.64 0.76 0.00 0.00 19:30 0.4 0.08 0.34 0.07 0.0081 0.0041 3.67 0.00 0.00 0.00 0.00 0.00 3.67 1099.06 0.23 1046.08 0.76 0.00 0.00 19:45 0.3 0.06 0.33 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 1100.20 0.23 1048.60 0.76 0.00 0.00 20:00 0.2 0.04 0.33 0.04 0.0040 0.0020 1.83 0.00 0.00 0.00 0.00 0.00 1.83 1101.02 0.23 1050.20 0.76 0.00 0.00 20:15 0.3 0.06 0.32 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 1101.55 0.23 1052.72 0.76 0.00 0.00 20:30 0.3 0.06 0.32 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 1102.38 0.23 1055.24 0.76 0.00 0.00 20:45 0.3 0.06 0.31 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 1103.21 0.23 1057.76 0.77 0.00 0.00 21:00 0.2 0.04 0.31 0.04 0.0040 0.0020 1.83 0.00 0.00 0.00 0.00 0.00 1.83 1104.04 0.23 1059.37 0.77 0.00 0.00 21:15 0.3 0.06 0.31 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 1104.57 0.23 1061.88 0.77 0.00 0.00 21:30 0.2 0.04 0.30 0.04 0.0040 0.0020 1.83 0.00 0.00 0.00 0.00 0.00 1.83 1105.40 0.23 1063.49 0.77 0.00 0.00 21:45 0.3 0.06 0.30 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 1105.92 0.23 1066.01 0.77 0.00 0.00 22:00 0.2 0.04 0.30 0.04 0.0040 0.0020 1.83 0.00 0.00 0.00 0.00 0.00 1.83 1106.75 0.23 1067.61 0.77 0.00 0.00 22:15 0.3 0.06 0.29 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 1107.28 0.23 1070.13 0.78 0.00 0.00 22:30 0.2 0.04 0.29 0.04 0.0040 0.0020 1.83 0.00 0.00 0.00 0.00 0.00 1.83 1108.11 0.23 1071.73 0.78 0.00 0.00 22:45 0.2 0.04 0.29 0.04 0.0040 0.0020 1.83 0.00 0.00 0.00 0.00 0.00 1.83 1108.64 0.23 1073.33 0.78 0.00 0.00 23:00 0.2 0.04 0.29 0.04 0.0040 0.0020 1.83 0.00 0.00 0.00 0.00 0.00 1.83 1109.16 0.23 1074.94 0.78 0.00 0.00 23:15 0.2 0.04 0.28 0.04 0.0040 0.0020 1.83 0.00 0.00 0.00 0.00 0.00 1.83 1109.69 0.23 1076.54 0.78 0.00 0.00 23:30 0.2 0.04 0.28 0.04 0.0040 0.0020 1.83 0.00 0.00 0.00 0.00 0.00 1.83 1110.22 0.23 1078.14 0.78 0.00 0.00 23:45 0.2 0.04 0.28 0.04 0.0040 0.0020 1.83 0.00 0.00 0.00 0.00 0.00 1.83 1110.74 0.23 1079.74 0.78 0.00 0.00 24:00 0.2 0.04 0.28 0.04 0.0040 0.0020 1.83 0.00 0.00 0.00 0.00 0.00 1.83 1111.27 0.23 1081.34 0.78 0.00 0.00 0 0.00 0.28 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1111.80 0.23 1081.11 0.78 0.00 0.00 Total volume (cf)1100.04 Total Overflow (cf)0.00
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HYDROLOGY CALCULATIONS - program updated 4-14-22 LC
Using the RCFC&WCD Short Cut Unit Hydrograph Method
Area Designations Area 1 VERSION 2 Area=0.73ac
5/7/2024 LOT 10-BACK
Drainage Area (ac.)0.7300 JOB NUMBER 22106
Unit time (minutes)5 5 5 15
100 Year Storm Duration (hrs)1 3 6 24
Total Precipitation (Plates D-4.4,E-5.2, 5.4, 5.6)(in.)2.41 3.10 3.79 5.05 from NOAA interactive website Soils Group A
AMC index II Runoff Number (plate E-6.1)32
Plate E-6.2 Pervious Area Loss Rate (Fp)(in/hr)0.74 (AMC II) Percentage of Impervious Cover (Ai)(%) (plate E-6.3)26.6 20% per the RCFC Hydrology Manual 1AC LOT-PLATE D 5.6 Weighted Average Loss Rate (F=Fp(1-.9Ai))(in./hr.)0.56 (used for 1, 3, and 6 hour storm, the 24 hour storm uses variable maximum loss rate per plate E-1.1 (3 of 6)) Low Loss Rate Percent (%) 90
Retention Basin Percolation Rate (in/hr)0.01 (also used for drywell percolation rate) Percolation is taken incrementally.

Drywell design factors Upper sec. (ft.)=0.001 Lower sec. (ft.)=0.001 Ring diam. (ft.) =0.001 Drywell lower max. (cf)=0.00 Upper max.(cf)=0.00 Gravel bed width around drywell=0.001 Drywell total(cf)=0.00 Ret. Basin design (area, depth) Top =2400 s.f.Bot. =623 s.f.Max. Depth (d)=4 Max. storage=5661.04 (d/3)*(bottom+top+(bottom*top)^0.50) Formulas vol=(h/3)*(bottom+top+(bottom*top)^0.50) area=bottom+(h/d)*(top-bottom)h=(vol*3)/(bottom+top+(bottom*top)^0.5)(values must be non-zero or error occurs) Outside input from:N/A 3.25
1 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 3.7 1.0700 0.5628 N/A 0.5072 0.3733 112.00 0.00 0.00 0.00 0.00 0.00 112.00 623.00 0.04 111.96 0.08 0.00 0.00 0:10 4.8 1.3882 0.5628 N/A 0.8253 0.6075 182.25 0.00 0.00 0.00 0.00 0.00 182.25 658.14 0.05 294.16 0.21 0.00 0.00 0:15 5.1 1.4749 0.5628 N/A 0.9121 0.6714 201.41 0.00 0.00 0.00 0.00 0.00 201.41 715.34 0.05 495.52 0.35 0.00 0.00 0:20 4.9 1.4171 0.5628 N/A 0.8542 0.6288 188.64 0.00 0.00 0.00 0.00 0.00 188.64 778.54 0.05 684.11 0.48 0.00 0.00 0:25 6.6 1.9087 0.5628 N/A 1.3459 0.9907 297.20 0.00 0.00 0.00 0.00 0.00 297.20 837.74 0.06 981.25 0.69 0.00 0.00 0:30 7.3 2.1112 0.5628 N/A 1.5483 1.1397 341.91 0.00 0.00 0.00 0.00 0.00 341.91 931.01 0.06 1323.09 0.93 0.00 0.00 0:35 8.4 2.4293 0.5628 N/A 1.8664 1.3739 412.16 0.00 0.00 0.00 0.00 0.00 412.16 1038.32 0.07 1735.18 1.23 0.00 0.00 0:40 9 2.6028 0.5628 N/A 2.0400 1.5016 450.47 0.00 0.00 0.00 0.00 0.00 450.47 1167.67 0.08 2185.57 1.54 0.00 0.00 0:45 12.3 3.5572 0.5628 N/A 2.9943 2.2041 661.22 0.00 0.00 0.00 0.00 0.00 661.22 1309.05 0.09 2846.70 2.01 0.00 0.00 0:50 17.6 5.0899 0.5628 N/A 4.5271 3.3323 999.69 0.00 0.00 0.00 0.00 0.00 999.69 1516.58 0.11 3846.28 2.72 0.00 0.00 0:55 16.1 4.6561 0.5628 N/A 4.0933 3.0130 903.90 0.00 0.00 0.00 0.00 0.00 903.90 1830.35 0.13 4750.05 3.36 0.00 0.00 1:00 4.2 1.2146 0.5628 N/A 0.6518 0.4798 143.93 0.00 0.00 0.00 0.00 0.00 143.93 2114.04 0.15 4893.84 3.46 0.00 0.00 MAX DEPTH 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2159.17 0.15 4893.69 3.46 0.00 0.00 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2159.13 0.15 4893.54 3.46 0.00 0.00 1:15 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2159.08 0.15 4893.39 3.46 0.00 0.00 Total volume (cf)4894.78 Total Overflow (cf)0.00
428
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3 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 1.3 0.48 0.56 0.44 0.0484 0.0356 10.68 0.00 0.00 0.00 0.00 0.00 10.68 623.00 0.04 10.64 0.01 0.00 0.00 0:10 1.3 0.48 0.56 0.44 0.0484 0.0356 10.68 0.00 0.00 0.00 0.00 0.00 10.68 626.34 0.04 21.27 0.02 0.00 0.00 0:15 1.1 0.41 0.56 0.37 0.0409 0.0301 9.04 0.00 0.00 0.00 0.00 0.00 9.04 629.68 0.04 30.26 0.02 0.00 0.00 0:20 1.5 0.56 0.56 0.50 0.0558 0.0411 12.32 0.00 0.00 0.00 0.00 0.00 12.32 632.50 0.04 42.54 0.03 0.00 0.00 0:25 1.5 0.56 0.56 0.50 0.0558 0.0411 12.32 0.00 0.00 0.00 0.00 0.00 12.32 636.35 0.04 54.82 0.04 0.00 0.00 0:30 1.8 0.67 0.56 N/A 0.1068 0.0786 23.57 0.00 0.00 0.00 0.00 0.00 23.57 640.21 0.04 78.35 0.06 0.00 0.00 0:35 1.5 0.56 0.56 0.50 0.0558 0.0411 12.32 0.00 0.00 0.00 0.00 0.00 12.32 647.59 0.04 90.63 0.06 0.00 0.00 0:40 1.8 0.67 0.56 N/A 0.1068 0.0786 23.57 0.00 0.00 0.00 0.00 0.00 23.57 651.45 0.05 114.16 0.08 0.00 0.00 0:45 1.8 0.67 0.56 N/A 0.1068 0.0786 23.57 0.00 0.00 0.00 0.00 0.00 23.57 658.83 0.05 137.68 0.10 0.00 0.00 0:50 1.5 0.56 0.56 0.50 0.0558 0.0411 12.32 0.00 0.00 0.00 0.00 0.00 12.32 666.22 0.05 149.96 0.11 0.00 0.00 0:55 1.6 0.60 0.56 0.54 0.0595 0.0438 13.14 0.00 0.00 0.00 0.00 0.00 13.14 670.07 0.05 163.06 0.12 0.00 0.00 1:00 1.8 0.67 0.56 N/A 0.1068 0.0786 23.57 0.00 0.00 0.00 0.00 0.00 23.57 674.18 0.05 186.58 0.13 0.00 0.00 1:05 2.2 0.82 0.56 N/A 0.2556 0.1881 56.43 0.00 0.00 0.00 0.00 0.00 56.43 681.57 0.05 242.97 0.17 0.00 0.00 1:10 2.2 0.82 0.56 N/A 0.2556 0.1881 56.43 0.00 0.00 0.00 0.00 0.00 56.43 699.27 0.05 299.36 0.21 0.00 0.00 1:15 2.2 0.82 0.56 N/A 0.2556 0.1881 56.43 0.00 0.00 0.00 0.00 0.00 56.43 716.97 0.05 355.74 0.25 0.00 0.00 1:20 2 0.74 0.56 N/A 0.1812 0.1333 40.00 0.00 0.00 0.00 0.00 0.00 40.00 734.67 0.05 395.69 0.28 0.00 0.00 1:25 2.6 0.97 0.56 N/A 0.4044 0.2976 89.29 0.00 0.00 0.00 0.00 0.00 89.29 747.21 0.05 484.93 0.34 0.00 0.00 1:30 2.7 1.00 0.56 N/A 0.4416 0.3250 97.51 0.00 0.00 0.00 0.00 0.00 97.51 775.22 0.05 582.38 0.41 0.00 0.00 1:35 2.4 0.89 0.56 N/A 0.3300 0.2429 72.86 0.00 0.00 0.00 0.00 0.00 72.86 805.81 0.06 655.19 0.46 0.00 0.00 1:40 2.7 1.00 0.56 N/A 0.4416 0.3250 97.51 0.00 0.00 0.00 0.00 0.00 97.51 828.66 0.06 752.64 0.53 0.00 0.00 1:45 3.3 1.23 0.56 N/A 0.6648 0.4893 146.79 0.00 0.00 0.00 0.00 0.00 146.79 859.25 0.06 899.37 0.64 0.00 0.00 1:50 3.1 1.15 0.56 N/A 0.5904 0.4346 130.37 0.00 0.00 0.00 0.00 0.00 130.37 905.31 0.06 1029.68 0.73 0.00 0.00 1:55 2.9 1.08 0.56 N/A 0.5160 0.3798 113.94 0.00 0.00 0.00 0.00 0.00 113.94 946.22 0.07 1143.55 0.81 0.00 0.00 2:00 3 1.12 0.56 N/A 0.5532 0.4072 122.15 0.00 0.00 0.00 0.00 0.00 122.15 981.96 0.07 1265.63 0.89 0.00 0.00 2:05 3.1 1.15 0.56 N/A 0.5904 0.4346 130.37 0.00 0.00 0.00 0.00 0.00 130.37 1020.28 0.07 1395.92 0.99 0.00 0.00 2:10 4.2 1.56 0.56 N/A 0.9996 0.7358 220.73 0.00 0.00 0.00 0.00 0.00 220.73 1061.18 0.07 1616.58 1.14 0.00 0.00 2:15 5 1.86 0.56 N/A 1.2972 0.9548 286.44 0.00 0.00 0.00 0.00 0.00 286.44 1130.44 0.08 1902.94 1.34 0.00 0.00 2:20 3.5 1.30 0.56 N/A 0.7392 0.5441 163.22 0.00 0.00 0.00 0.00 0.00 163.22 1220.33 0.08 2066.08 1.46 0.00 0.00 2:25 6.8 2.53 0.56 N/A 1.9668 1.4477 434.31 0.00 0.00 0.00 0.00 0.00 434.31 1271.54 0.09 2500.30 1.77 0.00 0.00 2:30 7.3 2.72 0.56 N/A 2.1528 1.5846 475.38 0.00 0.00 0.00 0.00 0.00 475.38 1407.84 0.10 2975.59 2.10 0.00 0.00 2:35 8.2 3.05 0.56 N/A 2.4876 1.8310 549.31 0.00 0.00 0.00 0.00 0.00 549.31 1557.04 0.11 3524.79 2.49 0.00 0.00 2:40 5.9 2.19 0.56 N/A 1.6320 1.2013 360.38 0.00 0.00 0.00 0.00 0.00 360.38 1729.43 0.12 3885.05 2.75 0.00 0.00 2:45 2 0.74 0.56 N/A 0.1812 0.1333 40.00 0.00 0.00 0.00 0.00 0.00 40.00 1842.52 0.13 3924.93 2.77 0.00 0.00 2:50 1.8 0.67 0.56 N/A 0.1068 0.0786 23.57 0.00 0.00 0.00 0.00 0.00 23.57 1855.03 0.13 3948.37 2.79 0.00 0.00 2:55 1.8 0.67 0.56 N/A 0.1068 0.0786 23.57 0.00 0.00 0.00 0.00 0.00 23.57 1862.39 0.13 3971.82 2.81 0.00 0.00 3:00 0.6 0.22 0.56 0.20 0.0223 0.0164 4.93 0.00 0.00 0.00 0.00 0.00 4.93 1869.75 0.13 3976.62 2.81 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1871.26 0.13 3976.49 2.81 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1871.22 0.13 3976.36 2.81 0.00 0.00 3:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1871.18 0.13 3976.23 2.81 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1871.14 0.13 3976.10 2.81 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1871.10 0.13 3975.97 2.81 0.00 0.00 3:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1871.05 0.13 3975.84 2.81 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1871.01 0.13 3975.71 2.81 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1870.97 0.13 3975.58 2.81 0.00 0.00 Total volume (cf)3979.07 Total Overflow (cf)0.00
429

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6 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 0.5 0.23 0.56 0.20 0.0227 0.0167 5.02 0.00 0.00 0.00 0.00 0.00 5.02 623.00 0.04 4.98 0.00 0.00 0.00 0:10 0.6 0.27 0.56 0.25 0.0273 0.0201 6.03 0.00 0.00 0.00 0.00 0.00 6.03 624.56 0.04 10.96 0.01 0.00 0.00 0:15 0.6 0.27 0.56 0.25 0.0273 0.0201 6.03 0.00 0.00 0.00 0.00 0.00 6.03 626.44 0.04 16.94 0.01 0.00 0.00 0:20 0.6 0.27 0.56 0.25 0.0273 0.0201 6.03 0.00 0.00 0.00 0.00 0.00 6.03 628.32 0.04 22.93 0.02 0.00 0.00 0:25 0.6 0.27 0.56 0.25 0.0273 0.0201 6.03 0.00 0.00 0.00 0.00 0.00 6.03 630.20 0.04 28.91 0.02 0.00 0.00 0:30 0.7 0.32 0.56 0.29 0.0318 0.0234 7.03 0.00 0.00 0.00 0.00 0.00 7.03 632.07 0.04 35.89 0.03 0.00 0.00 0:35 0.7 0.32 0.56 0.29 0.0318 0.0234 7.03 0.00 0.00 0.00 0.00 0.00 7.03 634.27 0.04 42.88 0.03 0.00 0.00 0:40 0.7 0.32 0.56 0.29 0.0318 0.0234 7.03 0.00 0.00 0.00 0.00 0.00 7.03 636.46 0.04 49.87 0.04 0.00 0.00 0:45 0.7 0.32 0.56 0.29 0.0318 0.0234 7.03 0.00 0.00 0.00 0.00 0.00 7.03 638.65 0.04 56.85 0.04 0.00 0.00 0:50 0.7 0.32 0.56 0.29 0.0318 0.0234 7.03 0.00 0.00 0.00 0.00 0.00 7.03 640.85 0.04 63.84 0.05 0.00 0.00 0:55 0.7 0.32 0.56 0.29 0.0318 0.0234 7.03 0.00 0.00 0.00 0.00 0.00 7.03 643.04 0.04 70.82 0.05 0.00 0.00 1:00 0.8 0.36 0.56 0.33 0.0364 0.0268 8.03 0.00 0.00 0.00 0.00 0.00 8.03 645.23 0.04 78.81 0.06 0.00 0.00 1:05 0.8 0.36 0.56 0.33 0.0364 0.0268 8.03 0.00 0.00 0.00 0.00 0.00 8.03 647.74 0.04 86.80 0.06 0.00 0.00 1:10 0.8 0.36 0.56 0.33 0.0364 0.0268 8.03 0.00 0.00 0.00 0.00 0.00 8.03 650.25 0.05 94.79 0.07 0.00 0.00 1:15 0.8 0.36 0.56 0.33 0.0364 0.0268 8.03 0.00 0.00 0.00 0.00 0.00 8.03 652.76 0.05 102.78 0.07 0.00 0.00 1:20 0.8 0.36 0.56 0.33 0.0364 0.0268 8.03 0.00 0.00 0.00 0.00 0.00 8.03 655.26 0.05 110.77 0.08 0.00 0.00 1:25 0.8 0.36 0.56 0.33 0.0364 0.0268 8.03 0.00 0.00 0.00 0.00 0.00 8.03 657.77 0.05 118.76 0.08 0.00 0.00 1:30 0.8 0.36 0.56 0.33 0.0364 0.0268 8.03 0.00 0.00 0.00 0.00 0.00 8.03 660.28 0.05 126.75 0.09 0.00 0.00 1:35 0.8 0.36 0.56 0.33 0.0364 0.0268 8.03 0.00 0.00 0.00 0.00 0.00 8.03 662.79 0.05 134.74 0.10 0.00 0.00 1:40 0.8 0.36 0.56 0.33 0.0364 0.0268 8.03 0.00 0.00 0.00 0.00 0.00 8.03 665.29 0.05 142.72 0.10 0.00 0.00 1:45 0.8 0.36 0.56 0.33 0.0364 0.0268 8.03 0.00 0.00 0.00 0.00 0.00 8.03 667.80 0.05 150.71 0.11 0.00 0.00 1:50 0.8 0.36 0.56 0.33 0.0364 0.0268 8.03 0.00 0.00 0.00 0.00 0.00 8.03 670.31 0.05 158.70 0.11 0.00 0.00 1:55 0.8 0.36 0.56 0.33 0.0364 0.0268 8.03 0.00 0.00 0.00 0.00 0.00 8.03 672.82 0.05 166.69 0.12 0.00 0.00 2:00 0.9 0.41 0.56 0.37 0.0409 0.0301 9.04 0.00 0.00 0.00 0.00 0.00 9.04 675.32 0.05 175.68 0.12 0.00 0.00 2:05 0.8 0.36 0.56 0.33 0.0364 0.0268 8.03 0.00 0.00 0.00 0.00 0.00 8.03 678.15 0.05 183.67 0.13 0.00 0.00 2:10 0.9 0.41 0.56 0.37 0.0409 0.0301 9.04 0.00 0.00 0.00 0.00 0.00 9.04 680.65 0.05 192.66 0.14 0.00 0.00 2:15 0.9 0.41 0.56 0.37 0.0409 0.0301 9.04 0.00 0.00 0.00 0.00 0.00 9.04 683.48 0.05 201.65 0.14 0.00 0.00 2:20 0.9 0.41 0.56 0.37 0.0409 0.0301 9.04 0.00 0.00 0.00 0.00 0.00 9.04 686.30 0.05 210.64 0.15 0.00 0.00 2:25 0.9 0.41 0.56 0.37 0.0409 0.0301 9.04 0.00 0.00 0.00 0.00 0.00 9.04 689.12 0.05 219.63 0.16 0.00 0.00 2:30 0.9 0.41 0.56 0.37 0.0409 0.0301 9.04 0.00 0.00 0.00 0.00 0.00 9.04 691.94 0.05 228.62 0.16 0.00 0.00 2:35 0.9 0.41 0.56 0.37 0.0409 0.0301 9.04 0.00 0.00 0.00 0.00 0.00 9.04 694.76 0.05 237.61 0.17 0.00 0.00 2:40 0.9 0.41 0.56 0.37 0.0409 0.0301 9.04 0.00 0.00 0.00 0.00 0.00 9.04 697.59 0.05 246.60 0.17 0.00 0.00 2:45 1 0.45 0.56 0.41 0.0455 0.0335 10.04 0.00 0.00 0.00 0.00 0.00 10.04 700.41 0.05 256.60 0.18 0.00 0.00 2:50 1 0.45 0.56 0.41 0.0455 0.0335 10.04 0.00 0.00 0.00 0.00 0.00 10.04 703.55 0.05 266.59 0.19 0.00 0.00 2:55 1 0.45 0.56 0.41 0.0455 0.0335 10.04 0.00 0.00 0.00 0.00 0.00 10.04 706.68 0.05 276.59 0.20 0.00 0.00 3:00 1 0.45 0.56 0.41 0.0455 0.0335 10.04 0.00 0.00 0.00 0.00 0.00 10.04 709.82 0.05 286.58 0.20 0.00 0.00 3:05 1 0.45 0.56 0.41 0.0455 0.0335 10.04 0.00 0.00 0.00 0.00 0.00 10.04 712.96 0.05 296.57 0.21 0.00 0.00 3:10 1.1 0.50 0.56 0.45 0.0500 0.0368 11.05 0.00 0.00 0.00 0.00 0.00 11.05 716.09 0.05 307.57 0.22 0.00 0.00 3:15 1.1 0.50 0.56 0.45 0.0500 0.0368 11.05 0.00 0.00 0.00 0.00 0.00 11.05 719.55 0.05 318.57 0.23 0.00 0.00 3:20 1.1 0.50 0.56 0.45 0.0500 0.0368 11.05 0.00 0.00 0.00 0.00 0.00 11.05 723.00 0.05 329.57 0.23 0.00 0.00 3:25 1.2 0.55 0.56 0.49 0.0546 0.0402 12.05 0.00 0.00 0.00 0.00 0.00 12.05 726.45 0.05 341.57 0.24 0.00 0.00 3:30 1.3 0.59 0.56 0.53 0.0591 0.0435 13.06 0.00 0.00 0.00 0.00 0.00 13.06 730.22 0.05 354.57 0.25 0.00 0.00 3:35 1.4 0.64 0.56 N/A 0.0739 0.0544 16.31 0.00 0.00 0.00 0.00 0.00 16.31 734.30 0.05 370.84 0.26 0.00 0.00 3:40 1.4 0.64 0.56 N/A 0.0739 0.0544 16.31 0.00 0.00 0.00 0.00 0.00 16.31 739.41 0.05 387.10 0.27 0.00 0.00 3:45 1.5 0.68 0.56 N/A 0.1194 0.0879 26.36 0.00 0.00 0.00 0.00 0.00 26.36 744.51 0.05 413.40 0.29 0.00 0.00 3:50 1.5 0.68 0.56 N/A 0.1194 0.0879 26.36 0.00 0.00 0.00 0.00 0.00 26.36 752.77 0.05 439.71 0.31 0.00 0.00 3:55 1.6 0.73 0.56 N/A 0.1648 0.1213 36.40 0.00 0.00 0.00 0.00 0.00 36.40 761.02 0.05 476.05 0.34 0.00 0.00 4:00 1.6 0.73 0.56 N/A 0.1648 0.1213 36.40 0.00 0.00 0.00 0.00 0.00 36.40 772.43 0.05 512.40 0.36 0.00 0.00 4:05 1.7 0.77 0.56 N/A 0.2103 0.1548 46.44 0.00 0.00 0.00 0.00 0.00 46.44 783.84 0.05 558.79 0.39 0.00 0.00 4:10 1.8 0.82 0.56 N/A 0.2558 0.1883 56.49 0.00 0.00 0.00 0.00 0.00 56.49 798.40 0.06 615.22 0.43 0.00 0.00 4:15 1.9 0.86 0.56 N/A 0.3013 0.2218 66.53 0.00 0.00 0.00 0.00 0.00 66.53 816.12 0.06 681.69 0.48 0.00 0.00 430

4 of 6
4:20 2 0.91 0.56 N/A 0.3468 0.2552 76.57 0.00 0.00 0.00 0.00 0.00 76.57 836.98 0.06 758.21 0.54 0.00 0.00 4:25 2.1 0.96 0.56 N/A 0.3922 0.2887 86.62 0.00 0.00 0.00 0.00 0.00 86.62 861.00 0.06 844.76 0.60 0.00 0.00 4:30 2.1 0.96 0.56 N/A 0.3922 0.2887 86.62 0.00 0.00 0.00 0.00 0.00 86.62 888.17 0.06 931.32 0.66 0.00 0.00 4:35 2.2 1.00 0.56 N/A 0.4377 0.3222 96.66 0.00 0.00 0.00 0.00 0.00 96.66 915.34 0.06 1027.91 0.73 0.00 0.00 4:40 2.3 1.05 0.56 N/A 0.4832 0.3557 106.70 0.00 0.00 0.00 0.00 0.00 106.70 945.66 0.07 1134.55 0.80 0.00 0.00 4:45 2.4 1.09 0.56 N/A 0.5287 0.3891 116.74 0.00 0.00 0.00 0.00 0.00 116.74 979.13 0.07 1251.22 0.88 0.00 0.00 4:50 2.4 1.09 0.56 N/A 0.5287 0.3891 116.74 0.00 0.00 0.00 0.00 0.00 116.74 1015.76 0.07 1367.90 0.97 0.00 0.00 4:55 2.5 1.14 0.56 N/A 0.5742 0.4226 126.79 0.00 0.00 0.00 0.00 0.00 126.79 1052.38 0.07 1494.61 1.06 0.00 0.00 5:00 2.6 1.18 0.56 N/A 0.6196 0.4561 136.83 0.00 0.00 0.00 0.00 0.00 136.83 1092.16 0.08 1631.37 1.15 0.00 0.00 5:05 3.1 1.41 0.56 N/A 0.8470 0.6235 187.05 0.00 0.00 0.00 0.00 0.00 187.05 1135.09 0.08 1818.34 1.28 0.00 0.00 5:10 3.6 1.64 0.56 N/A 1.0744 0.7909 237.26 0.00 0.00 0.00 0.00 0.00 237.26 1193.78 0.08 2055.52 1.45 0.00 0.00 5:15 3.9 1.77 0.56 N/A 1.2109 0.8913 267.39 0.00 0.00 0.00 0.00 0.00 267.39 1268.23 0.09 2322.82 1.64 0.00 0.00 5:20 4.2 1.91 0.56 N/A 1.3473 0.9917 297.52 0.00 0.00 0.00 0.00 0.00 297.52 1352.13 0.09 2620.25 1.85 0.00 0.00 5:25 4.7 2.14 0.56 N/A 1.5747 1.1591 347.74 0.00 0.00 0.00 0.00 0.00 347.74 1445.49 0.10 2967.88 2.10 0.00 0.00 5:30 5.6 2.55 0.56 N/A 1.9840 1.4604 438.12 0.00 0.00 0.00 0.00 0.00 438.12 1554.62 0.11 3405.90 2.41 0.00 0.00 5:35 1.9 0.86 0.56 N/A 0.3013 0.2218 66.53 0.00 0.00 0.00 0.00 0.00 66.53 1692.11 0.12 3472.31 2.45 0.00 0.00 5:40 0.9 0.41 0.56 0.37 0.0409 0.0301 9.04 0.00 0.00 0.00 0.00 0.00 9.04 1712.96 0.12 3481.23 2.46 0.00 0.00 5:45 0.6 0.27 0.56 0.25 0.0273 0.0201 6.03 0.00 0.00 0.00 0.00 0.00 6.03 1715.76 0.12 3487.14 2.46 0.00 0.00 5:50 0.5 0.23 0.56 0.20 0.0227 0.0167 5.02 0.00 0.00 0.00 0.00 0.00 5.02 1717.61 0.12 3492.04 2.47 0.00 0.00 5:55 0.3 0.14 0.56 0.12 0.0136 0.0100 3.01 0.00 0.00 0.00 0.00 0.00 3.01 1719.15 0.12 3494.93 2.47 0.00 0.00 6:00 0.2 0.09 0.56 0.08 0.0091 0.0067 2.01 0.00 0.00 0.00 0.00 0.00 2.01 1720.06 0.12 3496.82 2.47 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1720.65 0.12 3496.70 2.47 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1720.61 0.12 3496.58 2.47 0.00 0.00 6:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1720.58 0.12 3496.47 2.47 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1720.54 0.12 3496.35 2.47 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1720.50 0.12 3496.23 2.47 0.00 0.00 6:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1720.46 0.12 3496.11 2.47 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1720.43 0.12 3495.99 2.47 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1720.39 0.12 3495.87 2.47 0.00 0.00 6:45 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1720.35 0.12 3495.75 2.47 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1720.31 0.12 3495.63 2.47 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1720.28 0.12 3495.51 2.47 0.00 0.00 7:00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1720.24 0.12 3495.39 2.47 0.00 0.00 Total volume (cf)3501.12 Total Overflow (cf)0.00
431

5 of 6
24 Hour Storm in 15 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:15 0.2 0.04 0.99 0.04 0.0040 0.0030 2.68 0.00 0.00 0.00 0.00 0.00 2.68 623.00 0.13 2.55 0.00 0.00 0.00 0:30 0.3 0.06 0.98 0.05 0.0061 0.0045 4.01 0.00 0.00 0.00 0.00 0.00 4.01 623.80 0.13 6.43 0.00 0.00 0.00 0:45 0.3 0.06 0.97 0.05 0.0061 0.0045 4.01 0.00 0.00 0.00 0.00 0.00 4.01 625.02 0.13 10.32 0.01 0.00 0.00 1:00 0.4 0.08 0.95 0.07 0.0081 0.0059 5.35 0.00 0.00 0.00 0.00 0.00 5.35 626.24 0.13 15.54 0.01 0.00 0.00 1:15 0.3 0.06 0.94 0.05 0.0061 0.0045 4.01 0.00 0.00 0.00 0.00 0.00 4.01 627.88 0.13 19.42 0.01 0.00 0.00 1:30 0.3 0.06 0.93 0.05 0.0061 0.0045 4.01 0.00 0.00 0.00 0.00 0.00 4.01 629.10 0.13 23.31 0.02 0.00 0.00 1:45 0.3 0.06 0.92 0.05 0.0061 0.0045 4.01 0.00 0.00 0.00 0.00 0.00 4.01 630.32 0.13 27.19 0.02 0.00 0.00 2:00 0.4 0.08 0.91 0.07 0.0081 0.0059 5.35 0.00 0.00 0.00 0.00 0.00 5.35 631.53 0.13 32.41 0.02 0.00 0.00 2:15 0.4 0.08 0.90 0.07 0.0081 0.0059 5.35 0.00 0.00 0.00 0.00 0.00 5.35 633.17 0.13 37.63 0.03 0.00 0.00 2:30 0.4 0.08 0.89 0.07 0.0081 0.0059 5.35 0.00 0.00 0.00 0.00 0.00 5.35 634.81 0.13 42.85 0.03 0.00 0.00 2:45 0.5 0.10 0.88 0.09 0.0101 0.0074 6.69 0.00 0.00 0.00 0.00 0.00 6.69 636.45 0.13 49.41 0.03 0.00 0.00 3:00 0.5 0.10 0.87 0.09 0.0101 0.0074 6.69 0.00 0.00 0.00 0.00 0.00 6.69 638.51 0.13 55.97 0.04 0.00 0.00 3:15 0.5 0.10 0.85 0.09 0.0101 0.0074 6.69 0.00 0.00 0.00 0.00 0.00 6.69 640.57 0.13 62.53 0.04 0.00 0.00 3:30 0.5 0.10 0.84 0.09 0.0101 0.0074 6.69 0.00 0.00 0.00 0.00 0.00 6.69 642.63 0.13 69.08 0.05 0.00 0.00 3:45 0.5 0.10 0.83 0.09 0.0101 0.0074 6.69 0.00 0.00 0.00 0.00 0.00 6.69 644.68 0.13 75.64 0.05 0.00 0.00 4:00 0.6 0.12 0.82 0.11 0.0121 0.0089 8.03 0.00 0.00 0.00 0.00 0.00 8.03 646.74 0.13 83.53 0.06 0.00 0.00 4:15 0.6 0.12 0.81 0.11 0.0121 0.0089 8.03 0.00 0.00 0.00 0.00 0.00 8.03 649.22 0.14 91.43 0.06 0.00 0.00 4:30 0.7 0.14 0.80 0.13 0.0141 0.0104 9.37 0.00 0.00 0.00 0.00 0.00 9.37 651.70 0.14 100.66 0.07 0.00 0.00 4:45 0.7 0.14 0.79 0.13 0.0141 0.0104 9.37 0.00 0.00 0.00 0.00 0.00 9.37 654.60 0.14 109.89 0.08 0.00 0.00 5:00 0.8 0.16 0.78 0.15 0.0162 0.0119 10.71 0.00 0.00 0.00 0.00 0.00 10.71 657.49 0.14 120.46 0.09 0.00 0.00 5:15 0.6 0.12 0.77 0.11 0.0121 0.0089 8.03 0.00 0.00 0.00 0.00 0.00 8.03 660.81 0.14 128.35 0.09 0.00 0.00 5:30 0.7 0.14 0.76 0.13 0.0141 0.0104 9.37 0.00 0.00 0.00 0.00 0.00 9.37 663.29 0.14 137.58 0.10 0.00 0.00 5:45 0.8 0.16 0.75 0.15 0.0162 0.0119 10.71 0.00 0.00 0.00 0.00 0.00 10.71 666.19 0.14 148.15 0.10 0.00 0.00 6:00 0.8 0.16 0.74 0.15 0.0162 0.0119 10.71 0.00 0.00 0.00 0.00 0.00 10.71 669.50 0.14 158.71 0.11 0.00 0.00 6:15 0.9 0.18 0.73 0.16 0.0182 0.0134 12.04 0.00 0.00 0.00 0.00 0.00 12.04 672.82 0.14 170.62 0.12 0.00 0.00 6:30 0.9 0.18 0.72 0.16 0.0182 0.0134 12.04 0.00 0.00 0.00 0.00 0.00 12.04 676.56 0.14 182.52 0.13 0.00 0.00 6:45 1 0.20 0.71 0.18 0.0202 0.0149 13.38 0.00 0.00 0.00 0.00 0.00 13.38 680.29 0.14 195.76 0.14 0.00 0.00 7:00 1 0.20 0.70 0.18 0.0202 0.0149 13.38 0.00 0.00 0.00 0.00 0.00 13.38 684.45 0.14 209.00 0.15 0.00 0.00 7:15 1 0.20 0.69 0.18 0.0202 0.0149 13.38 0.00 0.00 0.00 0.00 0.00 13.38 688.60 0.14 222.24 0.16 0.00 0.00 7:30 1.1 0.22 0.68 0.20 0.0222 0.0164 14.72 0.00 0.00 0.00 0.00 0.00 14.72 692.76 0.14 236.81 0.17 0.00 0.00 7:45 1.2 0.24 0.67 0.22 0.0242 0.0178 16.06 0.00 0.00 0.00 0.00 0.00 16.06 697.34 0.15 252.73 0.18 0.00 0.00 8:00 1.3 0.26 0.66 0.24 0.0263 0.0193 17.40 0.00 0.00 0.00 0.00 0.00 17.40 702.33 0.15 269.98 0.19 0.00 0.00 8:15 1.5 0.30 0.66 0.27 0.0303 0.0223 20.07 0.00 0.00 0.00 0.00 0.00 20.07 707.75 0.15 289.90 0.20 0.00 0.00 8:30 1.5 0.30 0.65 0.27 0.0303 0.0223 20.07 0.00 0.00 0.00 0.00 0.00 20.07 714.00 0.15 309.83 0.22 0.00 0.00 8:45 1.6 0.32 0.64 0.29 0.0323 0.0238 21.41 0.00 0.00 0.00 0.00 0.00 21.41 720.25 0.15 331.09 0.23 0.00 0.00 9:00 1.7 0.34 0.63 0.31 0.0343 0.0253 22.75 0.00 0.00 0.00 0.00 0.00 22.75 726.93 0.15 353.69 0.25 0.00 0.00 9:15 1.9 0.38 0.62 0.35 0.0384 0.0283 25.43 0.00 0.00 0.00 0.00 0.00 25.43 734.02 0.15 378.96 0.27 0.00 0.00 9:30 2 0.40 0.61 0.36 0.0404 0.0297 26.76 0.00 0.00 0.00 0.00 0.00 26.76 741.95 0.15 405.57 0.29 0.00 0.00 9:45 2.1 0.42 0.60 0.38 0.0424 0.0312 28.10 0.00 0.00 0.00 0.00 0.00 28.10 750.31 0.16 433.51 0.31 0.00 0.00 10:00 2.2 0.44 0.59 0.40 0.0444 0.0327 29.44 0.00 0.00 0.00 0.00 0.00 29.44 759.08 0.16 462.80 0.33 0.00 0.00 10:15 1.5 0.30 0.58 0.27 0.0303 0.0223 20.07 0.00 0.00 0.00 0.00 0.00 20.07 768.27 0.16 482.71 0.34 0.00 0.00 10:30 1.5 0.30 0.58 0.27 0.0303 0.0223 20.07 0.00 0.00 0.00 0.00 0.00 20.07 774.52 0.16 502.62 0.36 0.00 0.00 10:45 2 0.40 0.57 0.36 0.0404 0.0297 26.76 0.00 0.00 0.00 0.00 0.00 26.76 780.77 0.16 529.22 0.37 0.00 0.00 11:00 2 0.40 0.56 0.36 0.0404 0.0297 26.76 0.00 0.00 0.00 0.00 0.00 26.76 789.12 0.16 555.82 0.39 0.00 0.00 11:15 1.9 0.38 0.55 0.35 0.0384 0.0283 25.43 0.00 0.00 0.00 0.00 0.00 25.43 797.47 0.17 581.08 0.41 0.00 0.00 11:30 1.9 0.38 0.54 0.35 0.0384 0.0283 25.43 0.00 0.00 0.00 0.00 0.00 25.43 805.40 0.17 606.34 0.43 0.00 0.00 11:45 1.7 0.34 0.53 0.31 0.0343 0.0253 22.75 0.00 0.00 0.00 0.00 0.00 22.75 813.33 0.17 628.92 0.44 0.00 0.00 12:00 1.8 0.36 0.53 0.33 0.0364 0.0268 24.09 0.00 0.00 0.00 0.00 0.00 24.09 820.42 0.17 652.84 0.46 0.00 0.00 12:15 2.5 0.51 0.52 0.45 0.0505 0.0372 33.45 0.00 0.00 0.00 0.00 0.00 33.45 827.92 0.17 686.12 0.48 0.00 0.00 12:30 2.6 0.53 0.51 0.47 0.0525 0.0387 34.79 0.00 0.00 0.00 0.00 0.00 34.79 838.37 0.17 720.74 0.51 0.00 0.00 12:45 2.8 0.57 0.50 N/A 0.0622 0.0458 41.23 0.00 0.00 0.00 0.00 0.00 41.23 849.24 0.18 761.79 0.54 0.00 0.00 432

6 of 6
13:00 2.9 0.59 0.50 N/A 0.0900 0.0663 59.64 0.00 0.00 0.00 0.00 0.00 59.64 862.12 0.18 821.25 0.58 0.00 0.00 13:15 3.4 0.69 0.49 N/A 0.1985 0.1461 131.52 0.00 0.00 0.00 0.00 0.00 131.52 880.79 0.18 952.59 0.67 0.00 0.00 13:30 3.4 0.69 0.48 N/A 0.2059 0.1516 136.43 0.00 0.00 0.00 0.00 0.00 136.43 922.02 0.19 1088.82 0.77 0.00 0.00 13:45 2.3 0.46 0.47 0.42 0.0465 0.0342 30.78 0.00 0.00 0.00 0.00 0.00 30.78 964.78 0.20 1119.40 0.79 0.00 0.00 14:00 2.3 0.46 0.47 0.42 0.0465 0.0342 30.78 0.00 0.00 0.00 0.00 0.00 30.78 974.38 0.20 1149.98 0.81 0.00 0.00 14:15 2.7 0.55 0.46 N/A 0.0862 0.0634 57.09 0.00 0.00 0.00 0.00 0.00 57.09 983.98 0.20 1206.87 0.85 0.00 0.00 14:30 2.6 0.53 0.45 N/A 0.0730 0.0537 48.36 0.00 0.00 0.00 0.00 0.00 48.36 1001.83 0.21 1255.02 0.89 0.00 0.00 14:45 2.6 0.53 0.45 N/A 0.0799 0.0588 52.94 0.00 0.00 0.00 0.00 0.00 52.94 1016.95 0.21 1307.75 0.92 0.00 0.00 15:00 2.5 0.51 0.44 N/A 0.0665 0.0490 44.07 0.00 0.00 0.00 0.00 0.00 44.07 1033.50 0.22 1351.60 0.96 0.00 0.00 15:15 2.4 0.48 0.43 N/A 0.0530 0.0390 35.14 0.00 0.00 0.00 0.00 0.00 35.14 1047.27 0.22 1386.52 0.98 0.00 0.00 15:30 2.3 0.46 0.43 0.42 0.0465 0.0342 30.78 0.00 0.00 0.00 0.00 0.00 30.78 1058.23 0.22 1417.08 1.00 0.00 0.00 15:45 1.9 0.38 0.42 0.35 0.0384 0.0283 25.43 0.00 0.00 0.00 0.00 0.00 25.43 1067.82 0.22 1442.28 1.02 0.00 0.00 16:00 1.9 0.38 0.41 0.35 0.0384 0.0283 25.43 0.00 0.00 0.00 0.00 0.00 25.43 1075.73 0.22 1467.48 1.04 0.00 0.00 16:15 0.4 0.08 0.41 0.07 0.0081 0.0059 5.35 0.00 0.00 0.00 0.00 0.00 5.35 1083.64 0.23 1472.61 1.04 0.00 0.00 16:30 0.4 0.08 0.40 0.07 0.0081 0.0059 5.35 0.00 0.00 0.00 0.00 0.00 5.35 1085.25 0.23 1477.74 1.04 0.00 0.00 16:45 0.3 0.06 0.39 0.05 0.0061 0.0045 4.01 0.00 0.00 0.00 0.00 0.00 4.01 1086.86 0.23 1481.53 1.05 0.00 0.00 17:00 0.3 0.06 0.39 0.05 0.0061 0.0045 4.01 0.00 0.00 0.00 0.00 0.00 4.01 1088.05 0.23 1485.31 1.05 0.00 0.00 17:15 0.5 0.10 0.38 0.09 0.0101 0.0074 6.69 0.00 0.00 0.00 0.00 0.00 6.69 1089.24 0.23 1491.78 1.05 0.00 0.00 17:30 0.5 0.10 0.38 0.09 0.0101 0.0074 6.69 0.00 0.00 0.00 0.00 0.00 6.69 1091.27 0.23 1498.24 1.06 0.00 0.00 17:45 0.5 0.10 0.37 0.09 0.0101 0.0074 6.69 0.00 0.00 0.00 0.00 0.00 6.69 1093.30 0.23 1504.70 1.06 0.00 0.00 18:00 0.4 0.08 0.37 0.07 0.0081 0.0059 5.35 0.00 0.00 0.00 0.00 0.00 5.35 1095.33 0.23 1509.83 1.07 0.00 0.00 18:15 0.4 0.08 0.36 0.07 0.0081 0.0059 5.35 0.00 0.00 0.00 0.00 0.00 5.35 1096.93 0.23 1514.95 1.07 0.00 0.00 18:30 0.4 0.08 0.35 0.07 0.0081 0.0059 5.35 0.00 0.00 0.00 0.00 0.00 5.35 1098.54 0.23 1520.08 1.07 0.00 0.00 18:45 0.3 0.06 0.35 0.05 0.0061 0.0045 4.01 0.00 0.00 0.00 0.00 0.00 4.01 1100.15 0.23 1523.86 1.08 0.00 0.00 19:00 0.2 0.04 0.34 0.04 0.0040 0.0030 2.68 0.00 0.00 0.00 0.00 0.00 2.68 1101.34 0.23 1526.31 1.08 0.00 0.00 19:15 0.3 0.06 0.34 0.05 0.0061 0.0045 4.01 0.00 0.00 0.00 0.00 0.00 4.01 1102.11 0.23 1530.09 1.08 0.00 0.00 19:30 0.4 0.08 0.34 0.07 0.0081 0.0059 5.35 0.00 0.00 0.00 0.00 0.00 5.35 1103.30 0.23 1535.22 1.08 0.00 0.00 19:45 0.3 0.06 0.33 0.05 0.0061 0.0045 4.01 0.00 0.00 0.00 0.00 0.00 4.01 1104.90 0.23 1539.00 1.09 0.00 0.00 20:00 0.2 0.04 0.33 0.04 0.0040 0.0030 2.68 0.00 0.00 0.00 0.00 0.00 2.68 1106.09 0.23 1541.45 1.09 0.00 0.00 20:15 0.3 0.06 0.32 0.05 0.0061 0.0045 4.01 0.00 0.00 0.00 0.00 0.00 4.01 1106.86 0.23 1545.23 1.09 0.00 0.00 20:30 0.3 0.06 0.32 0.05 0.0061 0.0045 4.01 0.00 0.00 0.00 0.00 0.00 4.01 1108.05 0.23 1549.02 1.09 0.00 0.00 20:45 0.3 0.06 0.31 0.05 0.0061 0.0045 4.01 0.00 0.00 0.00 0.00 0.00 4.01 1109.24 0.23 1552.80 1.10 0.00 0.00 21:00 0.2 0.04 0.31 0.04 0.0040 0.0030 2.68 0.00 0.00 0.00 0.00 0.00 2.68 1110.42 0.23 1555.24 1.10 0.00 0.00 21:15 0.3 0.06 0.31 0.05 0.0061 0.0045 4.01 0.00 0.00 0.00 0.00 0.00 4.01 1111.19 0.23 1559.03 1.10 0.00 0.00 21:30 0.2 0.04 0.30 0.04 0.0040 0.0030 2.68 0.00 0.00 0.00 0.00 0.00 2.68 1112.38 0.23 1561.47 1.10 0.00 0.00 21:45 0.3 0.06 0.30 0.05 0.0061 0.0045 4.01 0.00 0.00 0.00 0.00 0.00 4.01 1113.15 0.23 1565.26 1.11 0.00 0.00 22:00 0.2 0.04 0.30 0.04 0.0040 0.0030 2.68 0.00 0.00 0.00 0.00 0.00 2.68 1114.33 0.23 1567.70 1.11 0.00 0.00 22:15 0.3 0.06 0.29 0.05 0.0061 0.0045 4.01 0.00 0.00 0.00 0.00 0.00 4.01 1115.10 0.23 1571.48 1.11 0.00 0.00 22:30 0.2 0.04 0.29 0.04 0.0040 0.0030 2.68 0.00 0.00 0.00 0.00 0.00 2.68 1116.29 0.23 1573.93 1.11 0.00 0.00 22:45 0.2 0.04 0.29 0.04 0.0040 0.0030 2.68 0.00 0.00 0.00 0.00 0.00 2.68 1117.05 0.23 1576.37 1.11 0.00 0.00 23:00 0.2 0.04 0.29 0.04 0.0040 0.0030 2.68 0.00 0.00 0.00 0.00 0.00 2.68 1117.82 0.23 1578.81 1.12 0.00 0.00 23:15 0.2 0.04 0.28 0.04 0.0040 0.0030 2.68 0.00 0.00 0.00 0.00 0.00 2.68 1118.59 0.23 1581.26 1.12 0.00 0.00 23:30 0.2 0.04 0.28 0.04 0.0040 0.0030 2.68 0.00 0.00 0.00 0.00 0.00 2.68 1119.36 0.23 1583.70 1.12 0.00 0.00 23:45 0.2 0.04 0.28 0.04 0.0040 0.0030 2.68 0.00 0.00 0.00 0.00 0.00 2.68 1120.12 0.23 1586.14 1.12 0.00 0.00 24:00 0.2 0.04 0.28 0.04 0.0040 0.0030 2.68 0.00 0.00 0.00 0.00 0.00 2.68 1120.89 0.23 1588.59 1.12 0.00 0.00 0 0.00 0.28 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1121.66 0.23 1588.35 1.12 0.00 0.00 Total volume (cf)1606.06 Total Overflow (cf)0.00
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HYDROLOGY CALCULATIONS - program updated 4-14-22 LC
Using the RCFC&WCD Short Cut Unit Hydrograph Method
Area Designations Area 1 VERSION 2 Area=0.41ac+0.09ac typ street frontage=0.50ac

1.14 5/7/2024 LOT 11-FRONT
Drainage Area (ac.)0.5000 JOB NUMBER 22106
Unit time (minutes)5 5 5 15
100 Year Storm Duration (hrs)1 3 6 24
Total Precipitation (Plates D-4.4,E-5.2, 5.4, 5.6)(in.)2.41 3.10 3.79 5.05 from NOAA interactive website Soils Group A
AMC index II Runoff Number (plate E-6.1)32
Plate E-6.2 Pervious Area Loss Rate (Fp)(in/hr)0.74 (AMC II) Percentage of Impervious Cover (Ai)(%) (plate E-6.3)26.6 20% per the RCFC Hydrology Manual 1AC LOT-PLATE D 5.6 AND 0.09AC TYPICAL STREET FRONTAGE Weighted Average Loss Rate (F=Fp(1-.9Ai))(in./hr.)0.56 (used for 1, 3, and 6 hour storm, the 24 hour storm uses variable maximum loss rate per plate E-1.1 (3 of 6)) Low Loss Rate Percent (%) 90
Retention Basin Percolation Rate (in/hr)0.01 (also used for drywell percolation rate) Percolation is taken incrementally.

Drywell design factors Upper sec. (ft.)=0.001 Lower sec. (ft.)=0.001 Ring diam. (ft.) =0.001 Drywell lower max. (cf)=0.00 Upper max.(cf)=0.00 Gravel bed width around drywell=0.001 Drywell total(cf)=0.00 Ret. Basin design (area, depth) Top =2118 s.f.Bot. =756 s.f.Max. Depth (d)=3 Max. storage=4139.39 (d/3)*(bottom+top+(bottom*top)^0.50) Formulas vol=(h/3)*(bottom+top+(bottom*top)^0.50) area=bottom+(h/d)*(top-bottom)h=(vol*3)/(bottom+top+(bottom*top)^0.5)(values must be non-zero or error occurs) Outside input from:N/A 3.25
1 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 3.7 1.0700 0.5628 N/A 0.5072 0.2557 76.71 0.00 0.00 0.00 0.00 0.00 76.71 756.00 0.05 76.66 0.06 0.00 0.00 0:10 4.8 1.3882 0.5628 N/A 0.8253 0.4161 124.83 0.00 0.00 0.00 0.00 0.00 124.83 781.22 0.05 201.44 0.15 0.00 0.00 0:15 5.1 1.4749 0.5628 N/A 0.9121 0.4598 137.95 0.00 0.00 0.00 0.00 0.00 137.95 822.28 0.06 339.33 0.25 0.00 0.00 0:20 4.9 1.4171 0.5628 N/A 0.8542 0.4307 129.20 0.00 0.00 0.00 0.00 0.00 129.20 867.65 0.06 468.47 0.34 0.00 0.00 0:25 6.6 1.9087 0.5628 N/A 1.3459 0.6785 203.56 0.00 0.00 0.00 0.00 0.00 203.56 910.14 0.06 671.97 0.49 0.00 0.00 0:30 7.3 2.1112 0.5628 N/A 1.5483 0.7806 234.18 0.00 0.00 0.00 0.00 0.00 234.18 977.10 0.07 906.09 0.66 0.00 0.00 0:35 8.4 2.4293 0.5628 N/A 1.8664 0.9410 282.30 0.00 0.00 0.00 0.00 0.00 282.30 1054.13 0.07 1188.31 0.86 0.00 0.00 0:40 9 2.6028 0.5628 N/A 2.0400 1.0285 308.54 0.00 0.00 0.00 0.00 0.00 308.54 1147.00 0.08 1496.78 1.08 0.00 0.00 0:45 12.3 3.5572 0.5628 N/A 2.9943 1.5096 452.89 0.00 0.00 0.00 0.00 0.00 452.89 1248.49 0.09 1949.58 1.41 0.00 0.00 0:50 17.6 5.0899 0.5628 N/A 4.5271 2.2824 684.72 0.00 0.00 0.00 0.00 0.00 684.72 1397.48 0.10 2634.20 1.91 0.00 0.00 0:55 16.1 4.6561 0.5628 N/A 4.0933 2.0637 619.11 0.00 0.00 0.00 0.00 0.00 619.11 1622.74 0.11 3253.20 2.36 0.00 0.00 1:00 4.2 1.2146 0.5628 N/A 0.6518 0.3286 98.58 0.00 0.00 0.00 0.00 0.00 98.58 1826.41 0.13 3351.66 2.43 0.00 0.00 MAX DEPTH 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1858.81 0.13 3351.53 2.43 0.00 0.00 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1858.77 0.13 3351.40 2.43 0.00 0.00 1:15 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1858.72 0.13 3351.27 2.43 0.00 0.00 Total volume (cf)3352.59 Total Overflow (cf)0.00
434
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3 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 1.3 0.48 0.56 0.44 0.0484 0.0244 7.31 0.00 0.00 0.00 0.00 0.00 7.31 756.00 0.05 7.26 0.01 0.00 0.00 0:10 1.3 0.48 0.56 0.44 0.0484 0.0244 7.31 0.00 0.00 0.00 0.00 0.00 7.31 758.39 0.05 14.52 0.01 0.00 0.00 0:15 1.1 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 760.78 0.05 20.66 0.01 0.00 0.00 0:20 1.5 0.56 0.56 0.50 0.0558 0.0281 8.44 0.00 0.00 0.00 0.00 0.00 8.44 762.80 0.05 29.05 0.02 0.00 0.00 0:25 1.5 0.56 0.56 0.50 0.0558 0.0281 8.44 0.00 0.00 0.00 0.00 0.00 8.44 765.56 0.05 37.43 0.03 0.00 0.00 0:30 1.8 0.67 0.56 N/A 0.1068 0.0538 16.15 0.00 0.00 0.00 0.00 0.00 16.15 768.32 0.05 53.53 0.04 0.00 0.00 0:35 1.5 0.56 0.56 0.50 0.0558 0.0281 8.44 0.00 0.00 0.00 0.00 0.00 8.44 773.61 0.05 61.91 0.04 0.00 0.00 0:40 1.8 0.67 0.56 N/A 0.1068 0.0538 16.15 0.00 0.00 0.00 0.00 0.00 16.15 776.37 0.05 78.01 0.06 0.00 0.00 0:45 1.8 0.67 0.56 N/A 0.1068 0.0538 16.15 0.00 0.00 0.00 0.00 0.00 16.15 781.67 0.05 94.10 0.07 0.00 0.00 0:50 1.5 0.56 0.56 0.50 0.0558 0.0281 8.44 0.00 0.00 0.00 0.00 0.00 8.44 786.96 0.05 102.48 0.07 0.00 0.00 0:55 1.6 0.60 0.56 0.54 0.0595 0.0300 9.00 0.00 0.00 0.00 0.00 0.00 9.00 789.72 0.05 111.43 0.08 0.00 0.00 1:00 1.8 0.67 0.56 N/A 0.1068 0.0538 16.15 0.00 0.00 0.00 0.00 0.00 16.15 792.66 0.06 127.52 0.09 0.00 0.00 1:05 2.2 0.82 0.56 N/A 0.2556 0.1288 38.65 0.00 0.00 0.00 0.00 0.00 38.65 797.96 0.06 166.12 0.12 0.00 0.00 1:10 2.2 0.82 0.56 N/A 0.2556 0.1288 38.65 0.00 0.00 0.00 0.00 0.00 38.65 810.66 0.06 204.72 0.15 0.00 0.00 1:15 2.2 0.82 0.56 N/A 0.2556 0.1288 38.65 0.00 0.00 0.00 0.00 0.00 38.65 823.36 0.06 243.31 0.18 0.00 0.00 1:20 2 0.74 0.56 N/A 0.1812 0.0913 27.40 0.00 0.00 0.00 0.00 0.00 27.40 836.06 0.06 270.65 0.20 0.00 0.00 1:25 2.6 0.97 0.56 N/A 0.4044 0.2039 61.16 0.00 0.00 0.00 0.00 0.00 61.16 845.05 0.06 331.75 0.24 0.00 0.00 1:30 2.7 1.00 0.56 N/A 0.4416 0.2226 66.79 0.00 0.00 0.00 0.00 0.00 66.79 865.16 0.06 398.48 0.29 0.00 0.00 1:35 2.4 0.89 0.56 N/A 0.3300 0.1664 49.91 0.00 0.00 0.00 0.00 0.00 49.91 887.11 0.06 448.32 0.32 0.00 0.00 1:40 2.7 1.00 0.56 N/A 0.4416 0.2226 66.79 0.00 0.00 0.00 0.00 0.00 66.79 903.51 0.06 515.05 0.37 0.00 0.00 1:45 3.3 1.23 0.56 N/A 0.6648 0.3351 100.54 0.00 0.00 0.00 0.00 0.00 100.54 925.47 0.06 615.53 0.45 0.00 0.00 1:50 3.1 1.15 0.56 N/A 0.5904 0.2976 89.29 0.00 0.00 0.00 0.00 0.00 89.29 958.53 0.07 704.75 0.51 0.00 0.00 1:55 2.9 1.08 0.56 N/A 0.5160 0.2601 78.04 0.00 0.00 0.00 0.00 0.00 78.04 987.89 0.07 782.72 0.57 0.00 0.00 2:00 3 1.12 0.56 N/A 0.5532 0.2789 83.66 0.00 0.00 0.00 0.00 0.00 83.66 1013.54 0.07 866.32 0.63 0.00 0.00 2:05 3.1 1.15 0.56 N/A 0.5904 0.2976 89.29 0.00 0.00 0.00 0.00 0.00 89.29 1041.05 0.07 955.53 0.69 0.00 0.00 2:10 4.2 1.56 0.56 N/A 0.9996 0.5039 151.18 0.00 0.00 0.00 0.00 0.00 151.18 1070.40 0.07 1106.64 0.80 0.00 0.00 2:15 5 1.86 0.56 N/A 1.2972 0.6540 196.19 0.00 0.00 0.00 0.00 0.00 196.19 1120.12 0.08 1302.76 0.94 0.00 0.00 2:20 3.5 1.30 0.56 N/A 0.7392 0.3727 111.80 0.00 0.00 0.00 0.00 0.00 111.80 1184.65 0.08 1414.48 1.03 0.00 0.00 2:25 6.8 2.53 0.56 N/A 1.9668 0.9916 297.47 0.00 0.00 0.00 0.00 0.00 297.47 1221.41 0.08 1711.86 1.24 0.00 0.00 2:30 7.3 2.72 0.56 N/A 2.1528 1.0853 325.60 0.00 0.00 0.00 0.00 0.00 325.60 1319.26 0.09 2037.38 1.48 0.00 0.00 2:35 8.2 3.05 0.56 N/A 2.4876 1.2541 376.24 0.00 0.00 0.00 0.00 0.00 376.24 1426.37 0.10 2413.52 1.75 0.00 0.00 2:40 5.9 2.19 0.56 N/A 1.6320 0.8228 246.83 0.00 0.00 0.00 0.00 0.00 246.83 1550.13 0.11 2660.24 1.93 0.00 0.00 2:45 2 0.74 0.56 N/A 0.1812 0.0913 27.40 0.00 0.00 0.00 0.00 0.00 27.40 1631.31 0.11 2687.53 1.95 0.00 0.00 2:50 1.8 0.67 0.56 N/A 0.1068 0.0538 16.15 0.00 0.00 0.00 0.00 0.00 16.15 1640.29 0.11 2703.56 1.96 0.00 0.00 2:55 1.8 0.67 0.56 N/A 0.1068 0.0538 16.15 0.00 0.00 0.00 0.00 0.00 16.15 1645.56 0.11 2719.60 1.97 0.00 0.00 3:00 0.6 0.22 0.56 0.20 0.0223 0.0113 3.38 0.00 0.00 0.00 0.00 0.00 3.38 1650.84 0.11 2722.86 1.97 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.91 0.11 2722.74 1.97 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.88 0.11 2722.63 1.97 0.00 0.00 3:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.84 0.11 2722.51 1.97 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.80 0.11 2722.40 1.97 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.76 0.11 2722.28 1.97 0.00 0.00 3:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.72 0.11 2722.17 1.97 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.69 0.11 2722.05 1.97 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.65 0.11 2721.94 1.97 0.00 0.00 Total volume (cf)2725.39 Total Overflow (cf)0.00
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6 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 0.5 0.23 0.56 0.20 0.0227 0.0115 3.44 0.00 0.00 0.00 0.00 0.00 3.44 756.00 0.05 3.39 0.00 0.00 0.00 0:10 0.6 0.27 0.56 0.25 0.0273 0.0138 4.13 0.00 0.00 0.00 0.00 0.00 4.13 757.11 0.05 7.46 0.01 0.00 0.00 0:15 0.6 0.27 0.56 0.25 0.0273 0.0138 4.13 0.00 0.00 0.00 0.00 0.00 4.13 758.46 0.05 11.54 0.01 0.00 0.00 0:20 0.6 0.27 0.56 0.25 0.0273 0.0138 4.13 0.00 0.00 0.00 0.00 0.00 4.13 759.80 0.05 15.61 0.01 0.00 0.00 0:25 0.6 0.27 0.56 0.25 0.0273 0.0138 4.13 0.00 0.00 0.00 0.00 0.00 4.13 761.14 0.05 19.69 0.01 0.00 0.00 0:30 0.7 0.32 0.56 0.29 0.0318 0.0161 4.82 0.00 0.00 0.00 0.00 0.00 4.82 762.48 0.05 24.45 0.02 0.00 0.00 0:35 0.7 0.32 0.56 0.29 0.0318 0.0161 4.82 0.00 0.00 0.00 0.00 0.00 4.82 764.04 0.05 29.21 0.02 0.00 0.00 0:40 0.7 0.32 0.56 0.29 0.0318 0.0161 4.82 0.00 0.00 0.00 0.00 0.00 4.82 765.61 0.05 33.97 0.02 0.00 0.00 0:45 0.7 0.32 0.56 0.29 0.0318 0.0161 4.82 0.00 0.00 0.00 0.00 0.00 4.82 767.18 0.05 38.73 0.03 0.00 0.00 0:50 0.7 0.32 0.56 0.29 0.0318 0.0161 4.82 0.00 0.00 0.00 0.00 0.00 4.82 768.74 0.05 43.50 0.03 0.00 0.00 0:55 0.7 0.32 0.56 0.29 0.0318 0.0161 4.82 0.00 0.00 0.00 0.00 0.00 4.82 770.31 0.05 48.26 0.03 0.00 0.00 1:00 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 771.88 0.05 53.71 0.04 0.00 0.00 1:05 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 773.67 0.05 59.16 0.04 0.00 0.00 1:10 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 775.46 0.05 64.61 0.05 0.00 0.00 1:15 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 777.26 0.05 70.05 0.05 0.00 0.00 1:20 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 779.05 0.05 75.50 0.05 0.00 0.00 1:25 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 780.84 0.05 80.95 0.06 0.00 0.00 1:30 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 782.64 0.05 86.40 0.06 0.00 0.00 1:35 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 784.43 0.05 91.85 0.07 0.00 0.00 1:40 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 786.22 0.05 97.30 0.07 0.00 0.00 1:45 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 788.01 0.05 102.75 0.07 0.00 0.00 1:50 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 789.81 0.05 108.19 0.08 0.00 0.00 1:55 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 791.60 0.05 113.64 0.08 0.00 0.00 2:00 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 793.39 0.06 119.78 0.09 0.00 0.00 2:05 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 795.41 0.06 125.23 0.09 0.00 0.00 2:10 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 797.20 0.06 131.36 0.10 0.00 0.00 2:15 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 799.22 0.06 137.50 0.10 0.00 0.00 2:20 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 801.24 0.06 143.63 0.10 0.00 0.00 2:25 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 803.26 0.06 149.77 0.11 0.00 0.00 2:30 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 805.28 0.06 155.90 0.11 0.00 0.00 2:35 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 807.30 0.06 162.04 0.12 0.00 0.00 2:40 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 809.32 0.06 168.17 0.12 0.00 0.00 2:45 1 0.45 0.56 0.41 0.0455 0.0229 6.88 0.00 0.00 0.00 0.00 0.00 6.88 811.33 0.06 175.00 0.13 0.00 0.00 2:50 1 0.45 0.56 0.41 0.0455 0.0229 6.88 0.00 0.00 0.00 0.00 0.00 6.88 813.58 0.06 181.82 0.13 0.00 0.00 2:55 1 0.45 0.56 0.41 0.0455 0.0229 6.88 0.00 0.00 0.00 0.00 0.00 6.88 815.82 0.06 188.64 0.14 0.00 0.00 3:00 1 0.45 0.56 0.41 0.0455 0.0229 6.88 0.00 0.00 0.00 0.00 0.00 6.88 818.07 0.06 195.46 0.14 0.00 0.00 3:05 1 0.45 0.56 0.41 0.0455 0.0229 6.88 0.00 0.00 0.00 0.00 0.00 6.88 820.31 0.06 202.28 0.15 0.00 0.00 3:10 1.1 0.50 0.56 0.45 0.0500 0.0252 7.57 0.00 0.00 0.00 0.00 0.00 7.57 822.56 0.06 209.79 0.15 0.00 0.00 3:15 1.1 0.50 0.56 0.45 0.0500 0.0252 7.57 0.00 0.00 0.00 0.00 0.00 7.57 825.03 0.06 217.30 0.16 0.00 0.00 3:20 1.1 0.50 0.56 0.45 0.0500 0.0252 7.57 0.00 0.00 0.00 0.00 0.00 7.57 827.50 0.06 224.81 0.16 0.00 0.00 3:25 1.2 0.55 0.56 0.49 0.0546 0.0275 8.25 0.00 0.00 0.00 0.00 0.00 8.25 829.97 0.06 233.01 0.17 0.00 0.00 3:30 1.3 0.59 0.56 0.53 0.0591 0.0298 8.94 0.00 0.00 0.00 0.00 0.00 8.94 832.67 0.06 241.89 0.18 0.00 0.00 3:35 1.4 0.64 0.56 N/A 0.0739 0.0372 11.17 0.00 0.00 0.00 0.00 0.00 11.17 835.59 0.06 253.01 0.18 0.00 0.00 3:40 1.4 0.64 0.56 N/A 0.0739 0.0372 11.17 0.00 0.00 0.00 0.00 0.00 11.17 839.25 0.06 264.12 0.19 0.00 0.00 3:45 1.5 0.68 0.56 N/A 0.1194 0.0602 18.05 0.00 0.00 0.00 0.00 0.00 18.05 842.91 0.06 282.12 0.20 0.00 0.00 3:50 1.5 0.68 0.56 N/A 0.1194 0.0602 18.05 0.00 0.00 0.00 0.00 0.00 18.05 848.83 0.06 300.11 0.22 0.00 0.00 3:55 1.6 0.73 0.56 N/A 0.1648 0.0831 24.93 0.00 0.00 0.00 0.00 0.00 24.93 854.75 0.06 324.98 0.24 0.00 0.00 4:00 1.6 0.73 0.56 N/A 0.1648 0.0831 24.93 0.00 0.00 0.00 0.00 0.00 24.93 862.93 0.06 349.86 0.25 0.00 0.00 4:05 1.7 0.77 0.56 N/A 0.2103 0.1060 31.81 0.00 0.00 0.00 0.00 0.00 31.81 871.11 0.06 381.61 0.28 0.00 0.00 4:10 1.8 0.82 0.56 N/A 0.2558 0.1290 38.69 0.00 0.00 0.00 0.00 0.00 38.69 881.56 0.06 420.23 0.30 0.00 0.00 4:15 1.9 0.86 0.56 N/A 0.3013 0.1519 45.57 0.00 0.00 0.00 0.00 0.00 45.57 894.27 0.06 465.74 0.34 0.00 0.00 436

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24 Hour Storm in 15 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:15 0.2 0.04 0.99 0.04 0.0040 0.0020 1.83 0.00 0.00 0.00 0.00 0.00 1.83 756.00 0.16 1.68 0.00 0.00 0.00 0:30 0.3 0.06 0.98 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 756.55 0.16 4.27 0.00 0.00 0.00 0:45 0.3 0.06 0.97 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 757.40 0.16 6.86 0.00 0.00 0.00 1:00 0.4 0.08 0.95 0.07 0.0081 0.0041 3.67 0.00 0.00 0.00 0.00 0.00 3.67 758.26 0.16 10.37 0.01 0.00 0.00 1:15 0.3 0.06 0.94 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 759.41 0.16 12.96 0.01 0.00 0.00 1:30 0.3 0.06 0.93 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 760.26 0.16 15.55 0.01 0.00 0.00 1:45 0.3 0.06 0.92 0.05 0.0061 0.0031 2.75 0.00 0.00 0.00 0.00 0.00 2.75 761.12 0.16 18.14 0.01 0.00 0.00 2:00 0.4 0.08 0.91 0.07 0.0081 0.0041 3.67 0.00 0.00 0.00 0.00 0.00 3.67 761.97 0.16 21.65 0.02 0.00 0.00 2:15 0.4 0.08 0.90 0.07 0.0081 0.0041 3.67 0.00 0.00 0.00 0.00 0.00 3.67 763.12 0.16 25.16 0.02 0.00 0.00 2:30 0.4 0.08 0.89 0.07 0.0081 0.0041 3.67 0.00 0.00 0.00 0.00 0.00 3.67 764.28 0.16 28.66 0.02 0.00 0.00 2:45 0.5 0.10 0.88 0.09 0.0101 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 765.43 0.16 33.09 0.02 0.00 0.00 3:00 0.5 0.10 0.87 0.09 0.0101 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 766.89 0.16 37.51 0.03 0.00 0.00 3:15 0.5 0.10 0.85 0.09 0.0101 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 768.34 0.16 41.93 0.03 0.00 0.00 3:30 0.5 0.10 0.84 0.09 0.0101 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 769.80 0.16 46.36 0.03 0.00 0.00 3:45 0.5 0.10 0.83 0.09 0.0101 0.0051 4.58 0.00 0.00 0.00 0.00 0.00 4.58 771.25 0.16 50.78 0.04 0.00 0.00 4:00 0.6 0.12 0.82 0.11 0.0121 0.0061 5.50 0.00 0.00 0.00 0.00 0.00 5.50 772.71 0.16 56.12 0.04 0.00 0.00 4:15 0.6 0.12 0.81 0.11 0.0121 0.0061 5.50 0.00 0.00 0.00 0.00 0.00 5.50 774.46 0.16 61.45 0.04 0.00 0.00 4:30 0.7 0.14 0.80 0.13 0.0141 0.0071 6.42 0.00 0.00 0.00 0.00 0.00 6.42 776.22 0.16 67.71 0.05 0.00 0.00 4:45 0.7 0.14 0.79 0.13 0.0141 0.0071 6.42 0.00 0.00 0.00 0.00 0.00 6.42 778.28 0.16 73.96 0.05 0.00 0.00 5:00 0.8 0.16 0.78 0.15 0.0162 0.0081 7.33 0.00 0.00 0.00 0.00 0.00 7.33 780.34 0.16 81.13 0.06 0.00 0.00 5:15 0.6 0.12 0.77 0.11 0.0121 0.0061 5.50 0.00 0.00 0.00 0.00 0.00 5.50 782.70 0.16 86.47 0.06 0.00 0.00 5:30 0.7 0.14 0.76 0.13 0.0141 0.0071 6.42 0.00 0.00 0.00 0.00 0.00 6.42 784.45 0.16 92.72 0.07 0.00 0.00 5:45 0.8 0.16 0.75 0.15 0.0162 0.0081 7.33 0.00 0.00 0.00 0.00 0.00 7.33 786.51 0.16 99.89 0.07 0.00 0.00 6:00 0.8 0.16 0.74 0.15 0.0162 0.0081 7.33 0.00 0.00 0.00 0.00 0.00 7.33 788.87 0.16 107.06 0.08 0.00 0.00 6:15 0.9 0.18 0.73 0.16 0.0182 0.0092 8.25 0.00 0.00 0.00 0.00 0.00 8.25 791.23 0.16 115.14 0.08 0.00 0.00 6:30 0.9 0.18 0.72 0.16 0.0182 0.0092 8.25 0.00 0.00 0.00 0.00 0.00 8.25 793.89 0.17 123.23 0.09 0.00 0.00 6:45 1 0.20 0.71 0.18 0.0202 0.0102 9.17 0.00 0.00 0.00 0.00 0.00 9.17 796.55 0.17 132.23 0.10 0.00 0.00 7:00 1 0.20 0.70 0.18 0.0202 0.0102 9.17 0.00 0.00 0.00 0.00 0.00 9.17 799.51 0.17 141.23 0.10 0.00 0.00 7:15 1 0.20 0.69 0.18 0.0202 0.0102 9.17 0.00 0.00 0.00 0.00 0.00 9.17 802.47 0.17 150.22 0.11 0.00 0.00 7:30 1.1 0.22 0.68 0.20 0.0222 0.0112 10.08 0.00 0.00 0.00 0.00 0.00 10.08 805.43 0.17 160.14 0.12 0.00 0.00 7:45 1.2 0.24 0.67 0.22 0.0242 0.0122 11.00 0.00 0.00 0.00 0.00 0.00 11.00 808.69 0.17 170.97 0.12 0.00 0.00 8:00 1.3 0.26 0.66 0.24 0.0263 0.0132 11.92 0.00 0.00 0.00 0.00 0.00 11.92 812.25 0.17 182.72 0.13 0.00 0.00 8:15 1.5 0.30 0.66 0.27 0.0303 0.0153 13.75 0.00 0.00 0.00 0.00 0.00 13.75 816.12 0.17 196.29 0.14 0.00 0.00 8:30 1.5 0.30 0.65 0.27 0.0303 0.0153 13.75 0.00 0.00 0.00 0.00 0.00 13.75 820.59 0.17 209.87 0.15 0.00 0.00 8:45 1.6 0.32 0.64 0.29 0.0323 0.0163 14.67 0.00 0.00 0.00 0.00 0.00 14.67 825.06 0.17 224.37 0.16 0.00 0.00 9:00 1.7 0.34 0.63 0.31 0.0343 0.0173 15.58 0.00 0.00 0.00 0.00 0.00 15.58 829.82 0.17 239.77 0.17 0.00 0.00 9:15 1.9 0.38 0.62 0.35 0.0384 0.0193 17.41 0.00 0.00 0.00 0.00 0.00 17.41 834.89 0.17 257.02 0.19 0.00 0.00 9:30 2 0.40 0.61 0.36 0.0404 0.0204 18.33 0.00 0.00 0.00 0.00 0.00 18.33 840.57 0.18 275.17 0.20 0.00 0.00 9:45 2.1 0.42 0.60 0.38 0.0424 0.0214 19.25 0.00 0.00 0.00 0.00 0.00 19.25 846.54 0.18 294.24 0.21 0.00 0.00 10:00 2.2 0.44 0.59 0.40 0.0444 0.0224 20.16 0.00 0.00 0.00 0.00 0.00 20.16 852.82 0.18 314.23 0.23 0.00 0.00 10:15 1.5 0.30 0.58 0.27 0.0303 0.0153 13.75 0.00 0.00 0.00 0.00 0.00 13.75 859.39 0.18 327.80 0.24 0.00 0.00 10:30 1.5 0.30 0.58 0.27 0.0303 0.0153 13.75 0.00 0.00 0.00 0.00 0.00 13.75 863.86 0.18 341.37 0.25 0.00 0.00 10:45 2 0.40 0.57 0.36 0.0404 0.0204 18.33 0.00 0.00 0.00 0.00 0.00 18.33 868.32 0.18 359.52 0.26 0.00 0.00 11:00 2 0.40 0.56 0.36 0.0404 0.0204 18.33 0.00 0.00 0.00 0.00 0.00 18.33 874.29 0.18 377.67 0.27 0.00 0.00 11:15 1.9 0.38 0.55 0.35 0.0384 0.0193 17.41 0.00 0.00 0.00 0.00 0.00 17.41 880.27 0.18 394.90 0.29 0.00 0.00 11:30 1.9 0.38 0.54 0.35 0.0384 0.0193 17.41 0.00 0.00 0.00 0.00 0.00 17.41 885.94 0.18 412.13 0.30 0.00 0.00 11:45 1.7 0.34 0.53 0.31 0.0343 0.0173 15.58 0.00 0.00 0.00 0.00 0.00 15.58 891.60 0.19 427.53 0.31 0.00 0.00 12:00 1.8 0.36 0.53 0.33 0.0364 0.0183 16.50 0.00 0.00 0.00 0.00 0.00 16.50 896.67 0.19 443.84 0.32 0.00 0.00 12:15 2.5 0.51 0.52 0.45 0.0505 0.0255 22.91 0.00 0.00 0.00 0.00 0.00 22.91 902.04 0.19 466.56 0.34 0.00 0.00 12:30 2.6 0.53 0.51 0.47 0.0525 0.0265 23.83 0.00 0.00 0.00 0.00 0.00 23.83 909.52 0.19 490.21 0.36 0.00 0.00 12:45 2.8 0.57 0.50 N/A 0.0622 0.0314 28.24 0.00 0.00 0.00 0.00 0.00 28.24 917.29 0.19 518.25 0.38 0.00 0.00 438

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HYDROLOGY CALCULATIONS - program updated 4-14-22 LC
Using the RCFC&WCD Short Cut Unit Hydrograph Method
Area Designations Area 1 VERSION 2 Area=0.95ac
5/7/2024 LOT 11 BACK
Drainage Area (ac.)0.9500 JOB NUMBER 22106
Unit time (minutes)5 5 5 15
100 Year Storm Duration (hrs)1 3 6 24
Total Precipitation (Plates D-4.4,E-5.2, 5.4, 5.6)(in.)2.41 3.10 3.79 5.05 from NOAA interactive website Soils Group A
AMC index II Runoff Number (plate E-6.1)32
Plate E-6.2 Pervious Area Loss Rate (Fp)(in/hr)0.74 (AMC II) Percentage of Impervious Cover (Ai)(%) (plate E-6.3)26.6 20% per the RCFC Hydrology Manual 1AC LOT-PLATE D 5.6 Weighted Average Loss Rate (F=Fp(1-.9Ai))(in./hr.)0.56 (used for 1, 3, and 6 hour storm, the 24 hour storm uses variable maximum loss rate per plate E-1.1 (3 of 6)) Low Loss Rate Percent (%) 90
Retention Basin Percolation Rate (in/hr)0.01 (also used for drywell percolation rate) Percolation is taken incrementally.

Drywell design factors Upper sec. (ft.)=0.001 Lower sec. (ft.)=0.001 Ring diam. (ft.) =0.001 Drywell lower max. (cf)=0.00 Upper max.(cf)=0.00 Gravel bed width around drywell=0.001 Drywell total(cf)=0.00 Ret. Basin design (area, depth) Top =2788 s.f.Bot. =794 s.f.Max. Depth (d)=4 Max. storage=6759.79 (d/3)*(bottom+top+(bottom*top)^0.50) Formulas vol=(h/3)*(bottom+top+(bottom*top)^0.50) area=bottom+(h/d)*(top-bottom)h=(vol*3)/(bottom+top+(bottom*top)^0.5)(values must be non-zero or error occurs) Outside input from:N/A 3.25
1 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 3.7 1.0700 0.5628 N/A 0.5072 0.4859 145.76 0.00 0.00 0.00 0.00 0.00 145.76 794.00 0.06 145.70 0.09 0.00 0.00 0:10 4.8 1.3882 0.5628 N/A 0.8253 0.7906 237.18 0.00 0.00 0.00 0.00 0.00 237.18 836.98 0.06 382.82 0.23 0.00 0.00 0:15 5.1 1.4749 0.5628 N/A 0.9121 0.8737 262.11 0.00 0.00 0.00 0.00 0.00 262.11 906.92 0.06 644.86 0.38 0.00 0.00 0:20 4.9 1.4171 0.5628 N/A 0.8542 0.8183 245.49 0.00 0.00 0.00 0.00 0.00 245.49 984.22 0.07 890.28 0.53 0.00 0.00 0:25 6.6 1.9087 0.5628 N/A 1.3459 1.2892 386.77 0.00 0.00 0.00 0.00 0.00 386.77 1056.61 0.07 1276.98 0.76 0.00 0.00 0:30 7.3 2.1112 0.5628 N/A 1.5483 1.4832 444.95 0.00 0.00 0.00 0.00 0.00 444.95 1170.68 0.08 1721.84 1.02 0.00 0.00 0:35 8.4 2.4293 0.5628 N/A 1.8664 1.7879 536.37 0.00 0.00 0.00 0.00 0.00 536.37 1301.91 0.09 2258.12 1.34 0.00 0.00 0:40 9 2.6028 0.5628 N/A 2.0400 1.9541 586.23 0.00 0.00 0.00 0.00 0.00 586.23 1460.10 0.10 2844.25 1.68 0.00 0.00 0:45 12.3 3.5572 0.5628 N/A 2.9943 2.8683 860.49 0.00 0.00 0.00 0.00 0.00 860.49 1633.00 0.11 3704.63 2.19 0.00 0.00 0:50 17.6 5.0899 0.5628 N/A 4.5271 4.3366 1300.97 0.00 0.00 0.00 0.00 0.00 1300.97 1886.79 0.13 5005.47 2.96 0.00 0.00 0:55 16.1 4.6561 0.5628 N/A 4.0933 3.9210 1176.31 0.00 0.00 0.00 0.00 0.00 1176.31 2270.51 0.16 6181.61 3.66 0.00 0.00 1:00 4.2 1.2146 0.5628 N/A 0.6518 0.6244 187.31 0.00 0.00 0.00 0.00 0.00 187.31 2617.45 0.18 6368.74 3.77 0.00 0.00 MAX DEPTH 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2672.65 0.19 6368.56 3.77 0.00 0.00 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2672.59 0.19 6368.37 3.77 0.00 0.00 1:15 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2672.54 0.19 6368.19 3.77 0.00 0.00 Total volume (cf)6369.92 Total Overflow (cf)0.00
440
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3 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 1.3 0.48 0.56 0.44 0.0484 0.0463 13.90 0.00 0.00 0.00 0.00 0.00 13.90 794.00 0.06 13.84 0.01 0.00 0.00 0:10 1.3 0.48 0.56 0.44 0.0484 0.0463 13.90 0.00 0.00 0.00 0.00 0.00 13.90 798.08 0.06 27.68 0.02 0.00 0.00 0:15 1.1 0.41 0.56 0.37 0.0409 0.0392 11.76 0.00 0.00 0.00 0.00 0.00 11.76 802.17 0.06 39.39 0.02 0.00 0.00 0:20 1.5 0.56 0.56 0.50 0.0558 0.0535 16.04 0.00 0.00 0.00 0.00 0.00 16.04 805.62 0.06 55.37 0.03 0.00 0.00 0:25 1.5 0.56 0.56 0.50 0.0558 0.0535 16.04 0.00 0.00 0.00 0.00 0.00 16.04 810.33 0.06 71.35 0.04 0.00 0.00 0:30 1.8 0.67 0.56 N/A 0.1068 0.1023 30.68 0.00 0.00 0.00 0.00 0.00 30.68 815.05 0.06 101.97 0.06 0.00 0.00 0:35 1.5 0.56 0.56 0.50 0.0558 0.0535 16.04 0.00 0.00 0.00 0.00 0.00 16.04 824.08 0.06 117.95 0.07 0.00 0.00 0:40 1.8 0.67 0.56 N/A 0.1068 0.1023 30.68 0.00 0.00 0.00 0.00 0.00 30.68 828.79 0.06 148.57 0.09 0.00 0.00 0:45 1.8 0.67 0.56 N/A 0.1068 0.1023 30.68 0.00 0.00 0.00 0.00 0.00 30.68 837.82 0.06 179.19 0.11 0.00 0.00 0:50 1.5 0.56 0.56 0.50 0.0558 0.0535 16.04 0.00 0.00 0.00 0.00 0.00 16.04 846.86 0.06 195.17 0.12 0.00 0.00 0:55 1.6 0.60 0.56 0.54 0.0595 0.0570 17.10 0.00 0.00 0.00 0.00 0.00 17.10 851.57 0.06 212.21 0.13 0.00 0.00 1:00 1.8 0.67 0.56 N/A 0.1068 0.1023 30.68 0.00 0.00 0.00 0.00 0.00 30.68 856.60 0.06 242.83 0.14 0.00 0.00 1:05 2.2 0.82 0.56 N/A 0.2556 0.2448 73.44 0.00 0.00 0.00 0.00 0.00 73.44 865.63 0.06 316.21 0.19 0.00 0.00 1:10 2.2 0.82 0.56 N/A 0.2556 0.2448 73.44 0.00 0.00 0.00 0.00 0.00 73.44 887.28 0.06 389.59 0.23 0.00 0.00 1:15 2.2 0.82 0.56 N/A 0.2556 0.2448 73.44 0.00 0.00 0.00 0.00 0.00 73.44 908.92 0.06 462.97 0.27 0.00 0.00 1:20 2 0.74 0.56 N/A 0.1812 0.1735 52.06 0.00 0.00 0.00 0.00 0.00 52.06 930.57 0.06 514.96 0.30 0.00 0.00 1:25 2.6 0.97 0.56 N/A 0.4044 0.3873 116.20 0.00 0.00 0.00 0.00 0.00 116.20 945.90 0.07 631.10 0.37 0.00 0.00 1:30 2.7 1.00 0.56 N/A 0.4416 0.4230 126.89 0.00 0.00 0.00 0.00 0.00 126.89 980.16 0.07 757.92 0.45 0.00 0.00 1:35 2.4 0.89 0.56 N/A 0.3300 0.3161 94.82 0.00 0.00 0.00 0.00 0.00 94.82 1017.57 0.07 852.67 0.50 0.00 0.00 1:40 2.7 1.00 0.56 N/A 0.4416 0.4230 126.89 0.00 0.00 0.00 0.00 0.00 126.89 1045.52 0.07 979.49 0.58 0.00 0.00 1:45 3.3 1.23 0.56 N/A 0.6648 0.6368 191.03 0.00 0.00 0.00 0.00 0.00 191.03 1082.93 0.08 1170.45 0.69 0.00 0.00 1:50 3.1 1.15 0.56 N/A 0.5904 0.5655 169.65 0.00 0.00 0.00 0.00 0.00 169.65 1139.26 0.08 1340.03 0.79 0.00 0.00 1:55 2.9 1.08 0.56 N/A 0.5160 0.4942 148.27 0.00 0.00 0.00 0.00 0.00 148.27 1189.28 0.08 1488.22 0.88 0.00 0.00 2:00 3 1.12 0.56 N/A 0.5532 0.5299 158.96 0.00 0.00 0.00 0.00 0.00 158.96 1232.99 0.09 1647.09 0.97 0.00 0.00 2:05 3.1 1.15 0.56 N/A 0.5904 0.5655 169.65 0.00 0.00 0.00 0.00 0.00 169.65 1279.86 0.09 1816.66 1.07 0.00 0.00 2:10 4.2 1.56 0.56 N/A 0.9996 0.9575 287.25 0.00 0.00 0.00 0.00 0.00 287.25 1329.88 0.09 2103.81 1.24 0.00 0.00 2:15 5 1.86 0.56 N/A 1.2972 1.2426 372.77 0.00 0.00 0.00 0.00 0.00 372.77 1414.58 0.10 2476.49 1.47 0.00 0.00 2:20 3.5 1.30 0.56 N/A 0.7392 0.7080 212.41 0.00 0.00 0.00 0.00 0.00 212.41 1524.51 0.11 2688.80 1.59 0.00 0.00 2:25 6.8 2.53 0.56 N/A 1.9668 1.8840 565.20 0.00 0.00 0.00 0.00 0.00 565.20 1587.14 0.11 3253.88 1.93 0.00 0.00 2:30 7.3 2.72 0.56 N/A 2.1528 2.0622 618.65 0.00 0.00 0.00 0.00 0.00 618.65 1753.83 0.12 3872.41 2.29 0.00 0.00 2:35 8.2 3.05 0.56 N/A 2.4876 2.3829 714.86 0.00 0.00 0.00 0.00 0.00 714.86 1936.28 0.13 4587.13 2.71 0.00 0.00 2:40 5.9 2.19 0.56 N/A 1.6320 1.5633 468.98 0.00 0.00 0.00 0.00 0.00 468.98 2147.11 0.15 5055.97 2.99 0.00 0.00 2:45 2 0.74 0.56 N/A 0.1812 0.1735 52.06 0.00 0.00 0.00 0.00 0.00 52.06 2285.41 0.16 5107.87 3.02 0.00 0.00 2:50 1.8 0.67 0.56 N/A 0.1068 0.1023 30.68 0.00 0.00 0.00 0.00 0.00 30.68 2300.72 0.16 5138.39 3.04 0.00 0.00 2:55 1.8 0.67 0.56 N/A 0.1068 0.1023 30.68 0.00 0.00 0.00 0.00 0.00 30.68 2309.72 0.16 5168.91 3.06 0.00 0.00 3:00 0.6 0.22 0.56 0.20 0.0223 0.0214 6.41 0.00 0.00 0.00 0.00 0.00 6.41 2318.72 0.16 5175.16 3.06 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2320.57 0.16 5175.00 3.06 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2320.52 0.16 5174.84 3.06 0.00 0.00 3:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2320.47 0.16 5174.68 3.06 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2320.42 0.16 5174.52 3.06 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2320.38 0.16 5174.36 3.06 0.00 0.00 3:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2320.33 0.16 5174.19 3.06 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2320.28 0.16 5174.03 3.06 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2320.23 0.16 5173.87 3.06 0.00 0.00 Total volume (cf)5178.24 Total Overflow (cf)0.00
441

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6 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 0.5 0.23 0.56 0.20 0.0227 0.0218 6.53 0.00 0.00 0.00 0.00 0.00 6.53 794.00 0.06 6.48 0.00 0.00 0.00 0:10 0.6 0.27 0.56 0.25 0.0273 0.0261 7.84 0.00 0.00 0.00 0.00 0.00 7.84 795.91 0.06 14.27 0.01 0.00 0.00 0:15 0.6 0.27 0.56 0.25 0.0273 0.0261 7.84 0.00 0.00 0.00 0.00 0.00 7.84 798.21 0.06 22.05 0.01 0.00 0.00 0:20 0.6 0.27 0.56 0.25 0.0273 0.0261 7.84 0.00 0.00 0.00 0.00 0.00 7.84 800.51 0.06 29.84 0.02 0.00 0.00 0:25 0.6 0.27 0.56 0.25 0.0273 0.0261 7.84 0.00 0.00 0.00 0.00 0.00 7.84 802.80 0.06 37.63 0.02 0.00 0.00 0:30 0.7 0.32 0.56 0.29 0.0318 0.0305 9.15 0.00 0.00 0.00 0.00 0.00 9.15 805.10 0.06 46.72 0.03 0.00 0.00 0:35 0.7 0.32 0.56 0.29 0.0318 0.0305 9.15 0.00 0.00 0.00 0.00 0.00 9.15 807.78 0.06 55.81 0.03 0.00 0.00 0:40 0.7 0.32 0.56 0.29 0.0318 0.0305 9.15 0.00 0.00 0.00 0.00 0.00 9.15 810.46 0.06 64.90 0.04 0.00 0.00 0:45 0.7 0.32 0.56 0.29 0.0318 0.0305 9.15 0.00 0.00 0.00 0.00 0.00 9.15 813.15 0.06 74.00 0.04 0.00 0.00 0:50 0.7 0.32 0.56 0.29 0.0318 0.0305 9.15 0.00 0.00 0.00 0.00 0.00 9.15 815.83 0.06 83.09 0.05 0.00 0.00 0:55 0.7 0.32 0.56 0.29 0.0318 0.0305 9.15 0.00 0.00 0.00 0.00 0.00 9.15 818.51 0.06 92.18 0.05 0.00 0.00 1:00 0.8 0.36 0.56 0.33 0.0364 0.0349 10.46 0.00 0.00 0.00 0.00 0.00 10.46 821.19 0.06 102.58 0.06 0.00 0.00 1:05 0.8 0.36 0.56 0.33 0.0364 0.0349 10.46 0.00 0.00 0.00 0.00 0.00 10.46 824.26 0.06 112.98 0.07 0.00 0.00 1:10 0.8 0.36 0.56 0.33 0.0364 0.0349 10.46 0.00 0.00 0.00 0.00 0.00 10.46 827.33 0.06 123.38 0.07 0.00 0.00 1:15 0.8 0.36 0.56 0.33 0.0364 0.0349 10.46 0.00 0.00 0.00 0.00 0.00 10.46 830.39 0.06 133.77 0.08 0.00 0.00 1:20 0.8 0.36 0.56 0.33 0.0364 0.0349 10.46 0.00 0.00 0.00 0.00 0.00 10.46 833.46 0.06 144.17 0.09 0.00 0.00 1:25 0.8 0.36 0.56 0.33 0.0364 0.0349 10.46 0.00 0.00 0.00 0.00 0.00 10.46 836.53 0.06 154.57 0.09 0.00 0.00 1:30 0.8 0.36 0.56 0.33 0.0364 0.0349 10.46 0.00 0.00 0.00 0.00 0.00 10.46 839.60 0.06 164.97 0.10 0.00 0.00 1:35 0.8 0.36 0.56 0.33 0.0364 0.0349 10.46 0.00 0.00 0.00 0.00 0.00 10.46 842.66 0.06 175.36 0.10 0.00 0.00 1:40 0.8 0.36 0.56 0.33 0.0364 0.0349 10.46 0.00 0.00 0.00 0.00 0.00 10.46 845.73 0.06 185.76 0.11 0.00 0.00 1:45 0.8 0.36 0.56 0.33 0.0364 0.0349 10.46 0.00 0.00 0.00 0.00 0.00 10.46 848.80 0.06 196.16 0.12 0.00 0.00 1:50 0.8 0.36 0.56 0.33 0.0364 0.0349 10.46 0.00 0.00 0.00 0.00 0.00 10.46 851.86 0.06 206.56 0.12 0.00 0.00 1:55 0.8 0.36 0.56 0.33 0.0364 0.0349 10.46 0.00 0.00 0.00 0.00 0.00 10.46 854.93 0.06 216.95 0.13 0.00 0.00 2:00 0.9 0.41 0.56 0.37 0.0409 0.0392 11.76 0.00 0.00 0.00 0.00 0.00 11.76 858.00 0.06 228.66 0.14 0.00 0.00 2:05 0.8 0.36 0.56 0.33 0.0364 0.0349 10.46 0.00 0.00 0.00 0.00 0.00 10.46 861.45 0.06 239.05 0.14 0.00 0.00 2:10 0.9 0.41 0.56 0.37 0.0409 0.0392 11.76 0.00 0.00 0.00 0.00 0.00 11.76 864.52 0.06 250.75 0.15 0.00 0.00 2:15 0.9 0.41 0.56 0.37 0.0409 0.0392 11.76 0.00 0.00 0.00 0.00 0.00 11.76 867.97 0.06 262.46 0.16 0.00 0.00 2:20 0.9 0.41 0.56 0.37 0.0409 0.0392 11.76 0.00 0.00 0.00 0.00 0.00 11.76 871.42 0.06 274.16 0.16 0.00 0.00 2:25 0.9 0.41 0.56 0.37 0.0409 0.0392 11.76 0.00 0.00 0.00 0.00 0.00 11.76 874.87 0.06 285.86 0.17 0.00 0.00 2:30 0.9 0.41 0.56 0.37 0.0409 0.0392 11.76 0.00 0.00 0.00 0.00 0.00 11.76 878.32 0.06 297.56 0.18 0.00 0.00 2:35 0.9 0.41 0.56 0.37 0.0409 0.0392 11.76 0.00 0.00 0.00 0.00 0.00 11.76 881.78 0.06 309.26 0.18 0.00 0.00 2:40 0.9 0.41 0.56 0.37 0.0409 0.0392 11.76 0.00 0.00 0.00 0.00 0.00 11.76 885.23 0.06 320.97 0.19 0.00 0.00 2:45 1 0.45 0.56 0.41 0.0455 0.0436 13.07 0.00 0.00 0.00 0.00 0.00 13.07 888.68 0.06 333.97 0.20 0.00 0.00 2:50 1 0.45 0.56 0.41 0.0455 0.0436 13.07 0.00 0.00 0.00 0.00 0.00 13.07 892.52 0.06 346.98 0.21 0.00 0.00 2:55 1 0.45 0.56 0.41 0.0455 0.0436 13.07 0.00 0.00 0.00 0.00 0.00 13.07 896.35 0.06 359.99 0.21 0.00 0.00 3:00 1 0.45 0.56 0.41 0.0455 0.0436 13.07 0.00 0.00 0.00 0.00 0.00 13.07 900.19 0.06 373.00 0.22 0.00 0.00 3:05 1 0.45 0.56 0.41 0.0455 0.0436 13.07 0.00 0.00 0.00 0.00 0.00 13.07 904.03 0.06 386.00 0.23 0.00 0.00 3:10 1.1 0.50 0.56 0.45 0.0500 0.0479 14.38 0.00 0.00 0.00 0.00 0.00 14.38 907.86 0.06 400.32 0.24 0.00 0.00 3:15 1.1 0.50 0.56 0.45 0.0500 0.0479 14.38 0.00 0.00 0.00 0.00 0.00 14.38 912.09 0.06 414.63 0.25 0.00 0.00 3:20 1.1 0.50 0.56 0.45 0.0500 0.0479 14.38 0.00 0.00 0.00 0.00 0.00 14.38 916.31 0.06 428.94 0.25 0.00 0.00 3:25 1.2 0.55 0.56 0.49 0.0546 0.0523 15.68 0.00 0.00 0.00 0.00 0.00 15.68 920.53 0.06 444.56 0.26 0.00 0.00 3:30 1.3 0.59 0.56 0.53 0.0591 0.0566 16.99 0.00 0.00 0.00 0.00 0.00 16.99 925.14 0.06 461.49 0.27 0.00 0.00 3:35 1.4 0.64 0.56 N/A 0.0739 0.0708 21.23 0.00 0.00 0.00 0.00 0.00 21.23 930.13 0.06 482.66 0.29 0.00 0.00 3:40 1.4 0.64 0.56 N/A 0.0739 0.0708 21.23 0.00 0.00 0.00 0.00 0.00 21.23 936.37 0.07 503.82 0.30 0.00 0.00 3:45 1.5 0.68 0.56 N/A 0.1194 0.1143 34.30 0.00 0.00 0.00 0.00 0.00 34.30 942.62 0.07 538.06 0.32 0.00 0.00 3:50 1.5 0.68 0.56 N/A 0.1194 0.1143 34.30 0.00 0.00 0.00 0.00 0.00 34.30 952.72 0.07 572.29 0.34 0.00 0.00 3:55 1.6 0.73 0.56 N/A 0.1648 0.1579 47.37 0.00 0.00 0.00 0.00 0.00 47.37 962.81 0.07 619.59 0.37 0.00 0.00 4:00 1.6 0.73 0.56 N/A 0.1648 0.1579 47.37 0.00 0.00 0.00 0.00 0.00 47.37 976.77 0.07 666.89 0.39 0.00 0.00 4:05 1.7 0.77 0.56 N/A 0.2103 0.2015 60.44 0.00 0.00 0.00 0.00 0.00 60.44 990.72 0.07 727.26 0.43 0.00 0.00 4:10 1.8 0.82 0.56 N/A 0.2558 0.2450 73.51 0.00 0.00 0.00 0.00 0.00 73.51 1008.53 0.07 800.70 0.47 0.00 0.00 4:15 1.9 0.86 0.56 N/A 0.3013 0.2886 86.58 0.00 0.00 0.00 0.00 0.00 86.58 1030.19 0.07 887.21 0.52 0.00 0.00 442

4 of 6
4:20 2 0.91 0.56 N/A 0.3468 0.3322 99.65 0.00 0.00 0.00 0.00 0.00 99.65 1055.71 0.07 986.79 0.58 0.00 0.00 4:25 2.1 0.96 0.56 N/A 0.3922 0.3757 112.72 0.00 0.00 0.00 0.00 0.00 112.72 1085.08 0.08 1099.43 0.65 0.00 0.00 4:30 2.1 0.96 0.56 N/A 0.3922 0.3757 112.72 0.00 0.00 0.00 0.00 0.00 112.72 1118.31 0.08 1212.07 0.72 0.00 0.00 4:35 2.2 1.00 0.56 N/A 0.4377 0.4193 125.79 0.00 0.00 0.00 0.00 0.00 125.79 1151.54 0.08 1337.78 0.79 0.00 0.00 4:40 2.3 1.05 0.56 N/A 0.4832 0.4629 138.86 0.00 0.00 0.00 0.00 0.00 138.86 1188.62 0.08 1476.56 0.87 0.00 0.00 4:45 2.4 1.09 0.56 N/A 0.5287 0.5064 151.93 0.00 0.00 0.00 0.00 0.00 151.93 1229.55 0.09 1628.40 0.96 0.00 0.00 4:50 2.4 1.09 0.56 N/A 0.5287 0.5064 151.93 0.00 0.00 0.00 0.00 0.00 151.93 1274.34 0.09 1780.24 1.05 0.00 0.00 4:55 2.5 1.14 0.56 N/A 0.5742 0.5500 165.00 0.00 0.00 0.00 0.00 0.00 165.00 1319.13 0.09 1945.15 1.15 0.00 0.00 5:00 2.6 1.18 0.56 N/A 0.6196 0.5936 178.07 0.00 0.00 0.00 0.00 0.00 178.07 1367.78 0.09 2123.12 1.26 0.00 0.00 5:05 3.1 1.41 0.56 N/A 0.8470 0.8114 243.42 0.00 0.00 0.00 0.00 0.00 243.42 1420.28 0.10 2366.44 1.40 0.00 0.00 5:10 3.6 1.64 0.56 N/A 1.0744 1.0292 308.77 0.00 0.00 0.00 0.00 0.00 308.77 1492.05 0.10 2675.10 1.58 0.00 0.00 5:15 3.9 1.77 0.56 N/A 1.2109 1.1599 347.98 0.00 0.00 0.00 0.00 0.00 347.98 1583.10 0.11 3022.97 1.79 0.00 0.00 5:20 4.2 1.91 0.56 N/A 1.3473 1.2906 387.18 0.00 0.00 0.00 0.00 0.00 387.18 1685.71 0.12 3410.03 2.02 0.00 0.00 5:25 4.7 2.14 0.56 N/A 1.5747 1.5084 452.53 0.00 0.00 0.00 0.00 0.00 452.53 1799.89 0.12 3862.44 2.29 0.00 0.00 5:30 5.6 2.55 0.56 N/A 1.9840 1.9005 570.16 0.00 0.00 0.00 0.00 0.00 570.16 1933.34 0.13 4432.47 2.62 0.00 0.00 5:35 1.9 0.86 0.56 N/A 0.3013 0.2886 86.58 0.00 0.00 0.00 0.00 0.00 86.58 2101.49 0.15 4518.90 2.67 0.00 0.00 5:40 0.9 0.41 0.56 0.37 0.0409 0.0392 11.76 0.00 0.00 0.00 0.00 0.00 11.76 2126.98 0.15 4530.52 2.68 0.00 0.00 5:45 0.6 0.27 0.56 0.25 0.0273 0.0261 7.84 0.00 0.00 0.00 0.00 0.00 7.84 2130.41 0.15 4538.21 2.69 0.00 0.00 5:50 0.5 0.23 0.56 0.20 0.0227 0.0218 6.53 0.00 0.00 0.00 0.00 0.00 6.53 2132.68 0.15 4544.60 2.69 0.00 0.00 5:55 0.3 0.14 0.56 0.12 0.0136 0.0131 3.92 0.00 0.00 0.00 0.00 0.00 3.92 2134.56 0.15 4548.37 2.69 0.00 0.00 6:00 0.2 0.09 0.56 0.08 0.0091 0.0087 2.61 0.00 0.00 0.00 0.00 0.00 2.61 2135.68 0.15 4550.84 2.69 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2136.40 0.15 4550.69 2.69 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2136.36 0.15 4550.54 2.69 0.00 0.00 6:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2136.32 0.15 4550.39 2.69 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2136.27 0.15 4550.24 2.69 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2136.23 0.15 4550.10 2.69 0.00 0.00 6:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2136.19 0.15 4549.95 2.69 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2136.14 0.15 4549.80 2.69 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2136.10 0.15 4549.65 2.69 0.00 0.00 6:45 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2136.05 0.15 4549.50 2.69 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2136.01 0.15 4549.35 2.69 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2135.97 0.15 4549.21 2.69 0.00 0.00 7:00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2135.92 0.15 4549.06 2.69 0.00 0.00 Total volume (cf)4556.26 Total Overflow (cf)0.00
443

5 of 6
24 Hour Storm in 15 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:15 0.2 0.04 0.99 0.04 0.0040 0.0039 3.48 0.00 0.00 0.00 0.00 0.00 3.48 794.00 0.17 3.32 0.00 0.00 0.00 0:30 0.3 0.06 0.98 0.05 0.0061 0.0058 5.22 0.00 0.00 0.00 0.00 0.00 5.22 794.98 0.17 8.38 0.00 0.00 0.00 0:45 0.3 0.06 0.97 0.05 0.0061 0.0058 5.22 0.00 0.00 0.00 0.00 0.00 5.22 796.47 0.17 13.43 0.01 0.00 0.00 1:00 0.4 0.08 0.95 0.07 0.0081 0.0077 6.97 0.00 0.00 0.00 0.00 0.00 6.97 797.96 0.17 20.23 0.01 0.00 0.00 1:15 0.3 0.06 0.94 0.05 0.0061 0.0058 5.22 0.00 0.00 0.00 0.00 0.00 5.22 799.97 0.17 25.29 0.01 0.00 0.00 1:30 0.3 0.06 0.93 0.05 0.0061 0.0058 5.22 0.00 0.00 0.00 0.00 0.00 5.22 801.46 0.17 30.35 0.02 0.00 0.00 1:45 0.3 0.06 0.92 0.05 0.0061 0.0058 5.22 0.00 0.00 0.00 0.00 0.00 5.22 802.95 0.17 35.41 0.02 0.00 0.00 2:00 0.4 0.08 0.91 0.07 0.0081 0.0077 6.97 0.00 0.00 0.00 0.00 0.00 6.97 804.44 0.17 42.21 0.02 0.00 0.00 2:15 0.4 0.08 0.90 0.07 0.0081 0.0077 6.97 0.00 0.00 0.00 0.00 0.00 6.97 806.45 0.17 49.00 0.03 0.00 0.00 2:30 0.4 0.08 0.89 0.07 0.0081 0.0077 6.97 0.00 0.00 0.00 0.00 0.00 6.97 808.46 0.17 55.80 0.03 0.00 0.00 2:45 0.5 0.10 0.88 0.09 0.0101 0.0097 8.71 0.00 0.00 0.00 0.00 0.00 8.71 810.46 0.17 64.34 0.04 0.00 0.00 3:00 0.5 0.10 0.87 0.09 0.0101 0.0097 8.71 0.00 0.00 0.00 0.00 0.00 8.71 812.98 0.17 72.88 0.04 0.00 0.00 3:15 0.5 0.10 0.85 0.09 0.0101 0.0097 8.71 0.00 0.00 0.00 0.00 0.00 8.71 815.50 0.17 81.42 0.05 0.00 0.00 3:30 0.5 0.10 0.84 0.09 0.0101 0.0097 8.71 0.00 0.00 0.00 0.00 0.00 8.71 818.02 0.17 89.95 0.05 0.00 0.00 3:45 0.5 0.10 0.83 0.09 0.0101 0.0097 8.71 0.00 0.00 0.00 0.00 0.00 8.71 820.53 0.17 98.49 0.06 0.00 0.00 4:00 0.6 0.12 0.82 0.11 0.0121 0.0116 10.45 0.00 0.00 0.00 0.00 0.00 10.45 823.05 0.17 108.77 0.06 0.00 0.00 4:15 0.6 0.12 0.81 0.11 0.0121 0.0116 10.45 0.00 0.00 0.00 0.00 0.00 10.45 826.08 0.17 119.04 0.07 0.00 0.00 4:30 0.7 0.14 0.80 0.13 0.0141 0.0135 12.19 0.00 0.00 0.00 0.00 0.00 12.19 829.12 0.17 131.06 0.08 0.00 0.00 4:45 0.7 0.14 0.79 0.13 0.0141 0.0135 12.19 0.00 0.00 0.00 0.00 0.00 12.19 832.66 0.17 143.08 0.08 0.00 0.00 5:00 0.8 0.16 0.78 0.15 0.0162 0.0155 13.93 0.00 0.00 0.00 0.00 0.00 13.93 836.21 0.17 156.84 0.09 0.00 0.00 5:15 0.6 0.12 0.77 0.11 0.0121 0.0116 10.45 0.00 0.00 0.00 0.00 0.00 10.45 840.26 0.18 167.11 0.10 0.00 0.00 5:30 0.7 0.14 0.76 0.13 0.0141 0.0135 12.19 0.00 0.00 0.00 0.00 0.00 12.19 843.29 0.18 179.12 0.11 0.00 0.00 5:45 0.8 0.16 0.75 0.15 0.0162 0.0155 13.93 0.00 0.00 0.00 0.00 0.00 13.93 846.84 0.18 192.88 0.11 0.00 0.00 6:00 0.8 0.16 0.74 0.15 0.0162 0.0155 13.93 0.00 0.00 0.00 0.00 0.00 13.93 850.90 0.18 206.63 0.12 0.00 0.00 6:15 0.9 0.18 0.73 0.16 0.0182 0.0174 15.67 0.00 0.00 0.00 0.00 0.00 15.67 854.95 0.18 222.13 0.13 0.00 0.00 6:30 0.9 0.18 0.72 0.16 0.0182 0.0174 15.67 0.00 0.00 0.00 0.00 0.00 15.67 859.52 0.18 237.62 0.14 0.00 0.00 6:45 1 0.20 0.71 0.18 0.0202 0.0193 17.41 0.00 0.00 0.00 0.00 0.00 17.41 864.09 0.18 254.86 0.15 0.00 0.00 7:00 1 0.20 0.70 0.18 0.0202 0.0193 17.41 0.00 0.00 0.00 0.00 0.00 17.41 869.18 0.18 272.09 0.16 0.00 0.00 7:15 1 0.20 0.69 0.18 0.0202 0.0193 17.41 0.00 0.00 0.00 0.00 0.00 17.41 874.26 0.18 289.33 0.17 0.00 0.00 7:30 1.1 0.22 0.68 0.20 0.0222 0.0213 19.16 0.00 0.00 0.00 0.00 0.00 19.16 879.35 0.18 308.30 0.18 0.00 0.00 7:45 1.2 0.24 0.67 0.22 0.0242 0.0232 20.90 0.00 0.00 0.00 0.00 0.00 20.90 884.94 0.18 329.01 0.19 0.00 0.00 8:00 1.3 0.26 0.66 0.24 0.0263 0.0252 22.64 0.00 0.00 0.00 0.00 0.00 22.64 891.05 0.19 351.47 0.21 0.00 0.00 8:15 1.5 0.30 0.66 0.27 0.0303 0.0290 26.12 0.00 0.00 0.00 0.00 0.00 26.12 897.68 0.19 377.40 0.22 0.00 0.00 8:30 1.5 0.30 0.65 0.27 0.0303 0.0290 26.12 0.00 0.00 0.00 0.00 0.00 26.12 905.33 0.19 403.34 0.24 0.00 0.00 8:45 1.6 0.32 0.64 0.29 0.0323 0.0310 27.86 0.00 0.00 0.00 0.00 0.00 27.86 912.98 0.19 431.01 0.26 0.00 0.00 9:00 1.7 0.34 0.63 0.31 0.0343 0.0329 29.61 0.00 0.00 0.00 0.00 0.00 29.61 921.14 0.19 460.42 0.27 0.00 0.00 9:15 1.9 0.38 0.62 0.35 0.0384 0.0368 33.09 0.00 0.00 0.00 0.00 0.00 33.09 929.82 0.19 493.32 0.29 0.00 0.00 9:30 2 0.40 0.61 0.36 0.0404 0.0387 34.83 0.00 0.00 0.00 0.00 0.00 34.83 939.52 0.20 527.95 0.31 0.00 0.00 9:45 2.1 0.42 0.60 0.38 0.0424 0.0406 36.57 0.00 0.00 0.00 0.00 0.00 36.57 949.73 0.20 564.32 0.33 0.00 0.00 10:00 2.2 0.44 0.59 0.40 0.0444 0.0426 38.31 0.00 0.00 0.00 0.00 0.00 38.31 960.46 0.20 602.44 0.36 0.00 0.00 10:15 1.5 0.30 0.58 0.27 0.0303 0.0290 26.12 0.00 0.00 0.00 0.00 0.00 26.12 971.71 0.20 628.36 0.37 0.00 0.00 10:30 1.5 0.30 0.58 0.27 0.0303 0.0290 26.12 0.00 0.00 0.00 0.00 0.00 26.12 979.35 0.20 654.28 0.39 0.00 0.00 10:45 2 0.40 0.57 0.36 0.0404 0.0387 34.83 0.00 0.00 0.00 0.00 0.00 34.83 987.00 0.21 688.90 0.41 0.00 0.00 11:00 2 0.40 0.56 0.36 0.0404 0.0387 34.83 0.00 0.00 0.00 0.00 0.00 34.83 997.21 0.21 723.52 0.43 0.00 0.00 11:15 1.9 0.38 0.55 0.35 0.0384 0.0368 33.09 0.00 0.00 0.00 0.00 0.00 33.09 1007.42 0.21 756.40 0.45 0.00 0.00 11:30 1.9 0.38 0.54 0.35 0.0384 0.0368 33.09 0.00 0.00 0.00 0.00 0.00 33.09 1017.12 0.21 789.28 0.47 0.00 0.00 11:45 1.7 0.34 0.53 0.31 0.0343 0.0329 29.61 0.00 0.00 0.00 0.00 0.00 29.61 1026.82 0.21 818.67 0.48 0.00 0.00 12:00 1.8 0.36 0.53 0.33 0.0364 0.0348 31.35 0.00 0.00 0.00 0.00 0.00 31.35 1035.49 0.22 849.80 0.50 0.00 0.00 12:15 2.5 0.51 0.52 0.45 0.0505 0.0484 43.54 0.00 0.00 0.00 0.00 0.00 43.54 1044.67 0.22 893.12 0.53 0.00 0.00 12:30 2.6 0.53 0.51 0.47 0.0525 0.0503 45.28 0.00 0.00 0.00 0.00 0.00 45.28 1057.45 0.22 938.18 0.56 0.00 0.00 12:45 2.8 0.57 0.50 N/A 0.0622 0.0596 53.65 0.00 0.00 0.00 0.00 0.00 53.65 1070.74 0.22 991.61 0.59 0.00 0.00 444

6 of 6
13:00 2.9 0.59 0.50 N/A 0.0900 0.0862 77.62 0.00 0.00 0.00 0.00 0.00 77.62 1086.50 0.23 1068.99 0.63 0.00 0.00 13:15 3.4 0.69 0.49 N/A 0.1985 0.1902 171.16 0.00 0.00 0.00 0.00 0.00 171.16 1109.33 0.23 1239.92 0.73 0.00 0.00 13:30 3.4 0.69 0.48 N/A 0.2059 0.1973 177.55 0.00 0.00 0.00 0.00 0.00 177.55 1159.75 0.24 1417.23 0.84 0.00 0.00 13:45 2.3 0.46 0.47 0.42 0.0465 0.0445 40.05 0.00 0.00 0.00 0.00 0.00 40.05 1212.05 0.25 1457.03 0.86 0.00 0.00 14:00 2.3 0.46 0.47 0.42 0.0465 0.0445 40.05 0.00 0.00 0.00 0.00 0.00 40.05 1223.79 0.25 1496.83 0.89 0.00 0.00 14:15 2.7 0.55 0.46 N/A 0.0862 0.0826 74.30 0.00 0.00 0.00 0.00 0.00 74.30 1235.53 0.26 1570.87 0.93 0.00 0.00 14:30 2.6 0.53 0.45 N/A 0.0730 0.0699 62.93 0.00 0.00 0.00 0.00 0.00 62.93 1257.37 0.26 1633.54 0.97 0.00 0.00 14:45 2.6 0.53 0.45 N/A 0.0799 0.0766 68.90 0.00 0.00 0.00 0.00 0.00 68.90 1275.86 0.27 1702.17 1.01 0.00 0.00 15:00 2.5 0.51 0.44 N/A 0.0665 0.0637 57.35 0.00 0.00 0.00 0.00 0.00 57.35 1296.11 0.27 1759.26 1.04 0.00 0.00 15:15 2.4 0.48 0.43 N/A 0.0530 0.0508 45.72 0.00 0.00 0.00 0.00 0.00 45.72 1312.95 0.27 1804.71 1.07 0.00 0.00 15:30 2.3 0.46 0.43 0.42 0.0465 0.0445 40.05 0.00 0.00 0.00 0.00 0.00 40.05 1326.35 0.28 1844.49 1.09 0.00 0.00 15:45 1.9 0.38 0.42 0.35 0.0384 0.0368 33.09 0.00 0.00 0.00 0.00 0.00 33.09 1338.09 0.28 1877.30 1.11 0.00 0.00 16:00 1.9 0.38 0.41 0.35 0.0384 0.0368 33.09 0.00 0.00 0.00 0.00 0.00 33.09 1347.76 0.28 1910.10 1.13 0.00 0.00 16:15 0.4 0.08 0.41 0.07 0.0081 0.0077 6.97 0.00 0.00 0.00 0.00 0.00 6.97 1357.44 0.28 1916.79 1.13 0.00 0.00 16:30 0.4 0.08 0.40 0.07 0.0081 0.0077 6.97 0.00 0.00 0.00 0.00 0.00 6.97 1359.41 0.28 1923.47 1.14 0.00 0.00 16:45 0.3 0.06 0.39 0.05 0.0061 0.0058 5.22 0.00 0.00 0.00 0.00 0.00 5.22 1361.38 0.28 1928.41 1.14 0.00 0.00 17:00 0.3 0.06 0.39 0.05 0.0061 0.0058 5.22 0.00 0.00 0.00 0.00 0.00 5.22 1362.84 0.28 1933.35 1.14 0.00 0.00 17:15 0.5 0.10 0.38 0.09 0.0101 0.0097 8.71 0.00 0.00 0.00 0.00 0.00 8.71 1364.30 0.28 1941.77 1.15 0.00 0.00 17:30 0.5 0.10 0.38 0.09 0.0101 0.0097 8.71 0.00 0.00 0.00 0.00 0.00 8.71 1366.78 0.28 1950.20 1.15 0.00 0.00 17:45 0.5 0.10 0.37 0.09 0.0101 0.0097 8.71 0.00 0.00 0.00 0.00 0.00 8.71 1369.27 0.29 1958.62 1.16 0.00 0.00 18:00 0.4 0.08 0.37 0.07 0.0081 0.0077 6.97 0.00 0.00 0.00 0.00 0.00 6.97 1371.75 0.29 1965.30 1.16 0.00 0.00 18:15 0.4 0.08 0.36 0.07 0.0081 0.0077 6.97 0.00 0.00 0.00 0.00 0.00 6.97 1373.72 0.29 1971.98 1.17 0.00 0.00 18:30 0.4 0.08 0.35 0.07 0.0081 0.0077 6.97 0.00 0.00 0.00 0.00 0.00 6.97 1375.69 0.29 1978.66 1.17 0.00 0.00 18:45 0.3 0.06 0.35 0.05 0.0061 0.0058 5.22 0.00 0.00 0.00 0.00 0.00 5.22 1377.66 0.29 1983.60 1.17 0.00 0.00 19:00 0.2 0.04 0.34 0.04 0.0040 0.0039 3.48 0.00 0.00 0.00 0.00 0.00 3.48 1379.12 0.29 1986.79 1.18 0.00 0.00 19:15 0.3 0.06 0.34 0.05 0.0061 0.0058 5.22 0.00 0.00 0.00 0.00 0.00 5.22 1380.06 0.29 1991.73 1.18 0.00 0.00 19:30 0.4 0.08 0.34 0.07 0.0081 0.0077 6.97 0.00 0.00 0.00 0.00 0.00 6.97 1381.52 0.29 1998.41 1.18 0.00 0.00 19:45 0.3 0.06 0.33 0.05 0.0061 0.0058 5.22 0.00 0.00 0.00 0.00 0.00 5.22 1383.49 0.29 2003.34 1.19 0.00 0.00 20:00 0.2 0.04 0.33 0.04 0.0040 0.0039 3.48 0.00 0.00 0.00 0.00 0.00 3.48 1384.95 0.29 2006.54 1.19 0.00 0.00 20:15 0.3 0.06 0.32 0.05 0.0061 0.0058 5.22 0.00 0.00 0.00 0.00 0.00 5.22 1385.89 0.29 2011.47 1.19 0.00 0.00 20:30 0.3 0.06 0.32 0.05 0.0061 0.0058 5.22 0.00 0.00 0.00 0.00 0.00 5.22 1387.34 0.29 2016.41 1.19 0.00 0.00 20:45 0.3 0.06 0.31 0.05 0.0061 0.0058 5.22 0.00 0.00 0.00 0.00 0.00 5.22 1388.80 0.29 2021.34 1.20 0.00 0.00 21:00 0.2 0.04 0.31 0.04 0.0040 0.0039 3.48 0.00 0.00 0.00 0.00 0.00 3.48 1390.26 0.29 2024.54 1.20 0.00 0.00 21:15 0.3 0.06 0.31 0.05 0.0061 0.0058 5.22 0.00 0.00 0.00 0.00 0.00 5.22 1391.20 0.29 2029.47 1.20 0.00 0.00 21:30 0.2 0.04 0.30 0.04 0.0040 0.0039 3.48 0.00 0.00 0.00 0.00 0.00 3.48 1392.65 0.29 2032.66 1.20 0.00 0.00 21:45 0.3 0.06 0.30 0.05 0.0061 0.0058 5.22 0.00 0.00 0.00 0.00 0.00 5.22 1393.59 0.29 2037.60 1.21 0.00 0.00 22:00 0.2 0.04 0.30 0.04 0.0040 0.0039 3.48 0.00 0.00 0.00 0.00 0.00 3.48 1395.05 0.29 2040.79 1.21 0.00 0.00 22:15 0.3 0.06 0.29 0.05 0.0061 0.0058 5.22 0.00 0.00 0.00 0.00 0.00 5.22 1395.99 0.29 2045.72 1.21 0.00 0.00 22:30 0.2 0.04 0.29 0.04 0.0040 0.0039 3.48 0.00 0.00 0.00 0.00 0.00 3.48 1397.45 0.29 2048.92 1.21 0.00 0.00 22:45 0.2 0.04 0.29 0.04 0.0040 0.0039 3.48 0.00 0.00 0.00 0.00 0.00 3.48 1398.39 0.29 2052.11 1.21 0.00 0.00 23:00 0.2 0.04 0.29 0.04 0.0040 0.0039 3.48 0.00 0.00 0.00 0.00 0.00 3.48 1399.33 0.29 2055.30 1.22 0.00 0.00 23:15 0.2 0.04 0.28 0.04 0.0040 0.0039 3.48 0.00 0.00 0.00 0.00 0.00 3.48 1400.27 0.29 2058.49 1.22 0.00 0.00 23:30 0.2 0.04 0.28 0.04 0.0040 0.0039 3.48 0.00 0.00 0.00 0.00 0.00 3.48 1401.21 0.29 2061.68 1.22 0.00 0.00 23:45 0.2 0.04 0.28 0.04 0.0040 0.0039 3.48 0.00 0.00 0.00 0.00 0.00 3.48 1402.15 0.29 2064.87 1.22 0.00 0.00 24:00 0.2 0.04 0.28 0.04 0.0040 0.0039 3.48 0.00 0.00 0.00 0.00 0.00 3.48 1403.10 0.29 2068.06 1.22 0.00 0.00 0 0.00 0.28 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1404.04 0.29 2067.77 1.22 0.00 0.00 Total volume (cf)2090.08 Total Overflow (cf)0.00
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HYDROLOGY CALCULATIONS - program updated 4-14-22 LC
Using the RCFC&WCD Short Cut Unit Hydrograph Method
Area Designations Area 1 VERSION 2 Area=0.41ac+0.09ac typ street frontage=0.50ac

1.14 5/7/2024 LOT 12-FRONT
Drainage Area (ac.)0.5000 JOB NUMBER 22106
Unit time (minutes)5 5 5 15
100 Year Storm Duration (hrs)1 3 6 24
Total Precipitation (Plates D-4.4,E-5.2, 5.4, 5.6)(in.)2.41 3.10 3.79 5.05 from NOAA interactive website Soils Group A
AMC index II Runoff Number (plate E-6.1)32
Plate E-6.2 Pervious Area Loss Rate (Fp)(in/hr)0.74 (AMC II) Percentage of Impervious Cover (Ai)(%) (plate E-6.3)26.6 20% per the RCFC Hydrology Manual 1AC LOT-PLATE D 5.6 AND 0.09AC TYPICAL STREET FRONTAGE Weighted Average Loss Rate (F=Fp(1-.9Ai))(in./hr.)0.56 (used for 1, 3, and 6 hour storm, the 24 hour storm uses variable maximum loss rate per plate E-1.1 (3 of 6)) Low Loss Rate Percent (%) 90
Retention Basin Percolation Rate (in/hr)0.01 (also used for drywell percolation rate) Percolation is taken incrementally.

Drywell design factors Upper sec. (ft.)=0.001 Lower sec. (ft.)=0.001 Ring diam. (ft.) =0.001 Drywell lower max. (cf)=0.00 Upper max.(cf)=0.00 Gravel bed width around drywell=0.001 Drywell total(cf)=0.00 Ret. Basin design (area, depth) Top =2118 s.f.Bot. =756 s.f.Max. Depth (d)=3 Max. storage=4139.39 (d/3)*(bottom+top+(bottom*top)^0.50) Formulas vol=(h/3)*(bottom+top+(bottom*top)^0.50) area=bottom+(h/d)*(top-bottom)h=(vol*3)/(bottom+top+(bottom*top)^0.5)(values must be non-zero or error occurs) Outside input from:N/A 3.25
1 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 3.7 1.0700 0.5628 N/A 0.5072 0.2557 76.71 0.00 0.00 0.00 0.00 0.00 76.71 756.00 0.05 76.66 0.06 0.00 0.00 0:10 4.8 1.3882 0.5628 N/A 0.8253 0.4161 124.83 0.00 0.00 0.00 0.00 0.00 124.83 781.22 0.05 201.44 0.15 0.00 0.00 0:15 5.1 1.4749 0.5628 N/A 0.9121 0.4598 137.95 0.00 0.00 0.00 0.00 0.00 137.95 822.28 0.06 339.33 0.25 0.00 0.00 0:20 4.9 1.4171 0.5628 N/A 0.8542 0.4307 129.20 0.00 0.00 0.00 0.00 0.00 129.20 867.65 0.06 468.47 0.34 0.00 0.00 0:25 6.6 1.9087 0.5628 N/A 1.3459 0.6785 203.56 0.00 0.00 0.00 0.00 0.00 203.56 910.14 0.06 671.97 0.49 0.00 0.00 0:30 7.3 2.1112 0.5628 N/A 1.5483 0.7806 234.18 0.00 0.00 0.00 0.00 0.00 234.18 977.10 0.07 906.09 0.66 0.00 0.00 0:35 8.4 2.4293 0.5628 N/A 1.8664 0.9410 282.30 0.00 0.00 0.00 0.00 0.00 282.30 1054.13 0.07 1188.31 0.86 0.00 0.00 0:40 9 2.6028 0.5628 N/A 2.0400 1.0285 308.54 0.00 0.00 0.00 0.00 0.00 308.54 1147.00 0.08 1496.78 1.08 0.00 0.00 0:45 12.3 3.5572 0.5628 N/A 2.9943 1.5096 452.89 0.00 0.00 0.00 0.00 0.00 452.89 1248.49 0.09 1949.58 1.41 0.00 0.00 0:50 17.6 5.0899 0.5628 N/A 4.5271 2.2824 684.72 0.00 0.00 0.00 0.00 0.00 684.72 1397.48 0.10 2634.20 1.91 0.00 0.00 0:55 16.1 4.6561 0.5628 N/A 4.0933 2.0637 619.11 0.00 0.00 0.00 0.00 0.00 619.11 1622.74 0.11 3253.20 2.36 0.00 0.00 1:00 4.2 1.2146 0.5628 N/A 0.6518 0.3286 98.58 0.00 0.00 0.00 0.00 0.00 98.58 1826.41 0.13 3351.66 2.43 0.00 0.00 MAX DEPTH 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1858.81 0.13 3351.53 2.43 0.00 0.00 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1858.77 0.13 3351.40 2.43 0.00 0.00 1:15 0 0.0000 0.5628 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1858.72 0.13 3351.27 2.43 0.00 0.00 Total volume (cf)3352.59 Total Overflow (cf)0.00
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3 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 1.3 0.48 0.56 0.44 0.0484 0.0244 7.31 0.00 0.00 0.00 0.00 0.00 7.31 756.00 0.05 7.26 0.01 0.00 0.00 0:10 1.3 0.48 0.56 0.44 0.0484 0.0244 7.31 0.00 0.00 0.00 0.00 0.00 7.31 758.39 0.05 14.52 0.01 0.00 0.00 0:15 1.1 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 760.78 0.05 20.66 0.01 0.00 0.00 0:20 1.5 0.56 0.56 0.50 0.0558 0.0281 8.44 0.00 0.00 0.00 0.00 0.00 8.44 762.80 0.05 29.05 0.02 0.00 0.00 0:25 1.5 0.56 0.56 0.50 0.0558 0.0281 8.44 0.00 0.00 0.00 0.00 0.00 8.44 765.56 0.05 37.43 0.03 0.00 0.00 0:30 1.8 0.67 0.56 N/A 0.1068 0.0538 16.15 0.00 0.00 0.00 0.00 0.00 16.15 768.32 0.05 53.53 0.04 0.00 0.00 0:35 1.5 0.56 0.56 0.50 0.0558 0.0281 8.44 0.00 0.00 0.00 0.00 0.00 8.44 773.61 0.05 61.91 0.04 0.00 0.00 0:40 1.8 0.67 0.56 N/A 0.1068 0.0538 16.15 0.00 0.00 0.00 0.00 0.00 16.15 776.37 0.05 78.01 0.06 0.00 0.00 0:45 1.8 0.67 0.56 N/A 0.1068 0.0538 16.15 0.00 0.00 0.00 0.00 0.00 16.15 781.67 0.05 94.10 0.07 0.00 0.00 0:50 1.5 0.56 0.56 0.50 0.0558 0.0281 8.44 0.00 0.00 0.00 0.00 0.00 8.44 786.96 0.05 102.48 0.07 0.00 0.00 0:55 1.6 0.60 0.56 0.54 0.0595 0.0300 9.00 0.00 0.00 0.00 0.00 0.00 9.00 789.72 0.05 111.43 0.08 0.00 0.00 1:00 1.8 0.67 0.56 N/A 0.1068 0.0538 16.15 0.00 0.00 0.00 0.00 0.00 16.15 792.66 0.06 127.52 0.09 0.00 0.00 1:05 2.2 0.82 0.56 N/A 0.2556 0.1288 38.65 0.00 0.00 0.00 0.00 0.00 38.65 797.96 0.06 166.12 0.12 0.00 0.00 1:10 2.2 0.82 0.56 N/A 0.2556 0.1288 38.65 0.00 0.00 0.00 0.00 0.00 38.65 810.66 0.06 204.72 0.15 0.00 0.00 1:15 2.2 0.82 0.56 N/A 0.2556 0.1288 38.65 0.00 0.00 0.00 0.00 0.00 38.65 823.36 0.06 243.31 0.18 0.00 0.00 1:20 2 0.74 0.56 N/A 0.1812 0.0913 27.40 0.00 0.00 0.00 0.00 0.00 27.40 836.06 0.06 270.65 0.20 0.00 0.00 1:25 2.6 0.97 0.56 N/A 0.4044 0.2039 61.16 0.00 0.00 0.00 0.00 0.00 61.16 845.05 0.06 331.75 0.24 0.00 0.00 1:30 2.7 1.00 0.56 N/A 0.4416 0.2226 66.79 0.00 0.00 0.00 0.00 0.00 66.79 865.16 0.06 398.48 0.29 0.00 0.00 1:35 2.4 0.89 0.56 N/A 0.3300 0.1664 49.91 0.00 0.00 0.00 0.00 0.00 49.91 887.11 0.06 448.32 0.32 0.00 0.00 1:40 2.7 1.00 0.56 N/A 0.4416 0.2226 66.79 0.00 0.00 0.00 0.00 0.00 66.79 903.51 0.06 515.05 0.37 0.00 0.00 1:45 3.3 1.23 0.56 N/A 0.6648 0.3351 100.54 0.00 0.00 0.00 0.00 0.00 100.54 925.47 0.06 615.53 0.45 0.00 0.00 1:50 3.1 1.15 0.56 N/A 0.5904 0.2976 89.29 0.00 0.00 0.00 0.00 0.00 89.29 958.53 0.07 704.75 0.51 0.00 0.00 1:55 2.9 1.08 0.56 N/A 0.5160 0.2601 78.04 0.00 0.00 0.00 0.00 0.00 78.04 987.89 0.07 782.72 0.57 0.00 0.00 2:00 3 1.12 0.56 N/A 0.5532 0.2789 83.66 0.00 0.00 0.00 0.00 0.00 83.66 1013.54 0.07 866.32 0.63 0.00 0.00 2:05 3.1 1.15 0.56 N/A 0.5904 0.2976 89.29 0.00 0.00 0.00 0.00 0.00 89.29 1041.05 0.07 955.53 0.69 0.00 0.00 2:10 4.2 1.56 0.56 N/A 0.9996 0.5039 151.18 0.00 0.00 0.00 0.00 0.00 151.18 1070.40 0.07 1106.64 0.80 0.00 0.00 2:15 5 1.86 0.56 N/A 1.2972 0.6540 196.19 0.00 0.00 0.00 0.00 0.00 196.19 1120.12 0.08 1302.76 0.94 0.00 0.00 2:20 3.5 1.30 0.56 N/A 0.7392 0.3727 111.80 0.00 0.00 0.00 0.00 0.00 111.80 1184.65 0.08 1414.48 1.03 0.00 0.00 2:25 6.8 2.53 0.56 N/A 1.9668 0.9916 297.47 0.00 0.00 0.00 0.00 0.00 297.47 1221.41 0.08 1711.86 1.24 0.00 0.00 2:30 7.3 2.72 0.56 N/A 2.1528 1.0853 325.60 0.00 0.00 0.00 0.00 0.00 325.60 1319.26 0.09 2037.38 1.48 0.00 0.00 2:35 8.2 3.05 0.56 N/A 2.4876 1.2541 376.24 0.00 0.00 0.00 0.00 0.00 376.24 1426.37 0.10 2413.52 1.75 0.00 0.00 2:40 5.9 2.19 0.56 N/A 1.6320 0.8228 246.83 0.00 0.00 0.00 0.00 0.00 246.83 1550.13 0.11 2660.24 1.93 0.00 0.00 2:45 2 0.74 0.56 N/A 0.1812 0.0913 27.40 0.00 0.00 0.00 0.00 0.00 27.40 1631.31 0.11 2687.53 1.95 0.00 0.00 2:50 1.8 0.67 0.56 N/A 0.1068 0.0538 16.15 0.00 0.00 0.00 0.00 0.00 16.15 1640.29 0.11 2703.56 1.96 0.00 0.00 2:55 1.8 0.67 0.56 N/A 0.1068 0.0538 16.15 0.00 0.00 0.00 0.00 0.00 16.15 1645.56 0.11 2719.60 1.97 0.00 0.00 3:00 0.6 0.22 0.56 0.20 0.0223 0.0113 3.38 0.00 0.00 0.00 0.00 0.00 3.38 1650.84 0.11 2722.86 1.97 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.91 0.11 2722.74 1.97 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.88 0.11 2722.63 1.97 0.00 0.00 3:15 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.84 0.11 2722.51 1.97 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.80 0.11 2722.40 1.97 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.76 0.11 2722.28 1.97 0.00 0.00 3:30 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.72 0.11 2722.17 1.97 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.69 0.11 2722.05 1.97 0.00 0.00 0 0.00 0.56 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1651.65 0.11 2721.94 1.97 0.00 0.00 Total volume (cf)2725.39 Total Overflow (cf)0.00
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6 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow %Rain (in/hr)Max.Min.Rain (in/hr)Rate (cfs)Vol. (cf)Input (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Basin (cf)Area (sf)Perc. (cf)Vol. (cf)Depth (ft)Vol. (cf)Rate (cfs) 0:05 0.5 0.23 0.56 0.20 0.0227 0.0115 3.44 0.00 0.00 0.00 0.00 0.00 3.44 756.00 0.05 3.39 0.00 0.00 0.00 0:10 0.6 0.27 0.56 0.25 0.0273 0.0138 4.13 0.00 0.00 0.00 0.00 0.00 4.13 757.11 0.05 7.46 0.01 0.00 0.00 0:15 0.6 0.27 0.56 0.25 0.0273 0.0138 4.13 0.00 0.00 0.00 0.00 0.00 4.13 758.46 0.05 11.54 0.01 0.00 0.00 0:20 0.6 0.27 0.56 0.25 0.0273 0.0138 4.13 0.00 0.00 0.00 0.00 0.00 4.13 759.80 0.05 15.61 0.01 0.00 0.00 0:25 0.6 0.27 0.56 0.25 0.0273 0.0138 4.13 0.00 0.00 0.00 0.00 0.00 4.13 761.14 0.05 19.69 0.01 0.00 0.00 0:30 0.7 0.32 0.56 0.29 0.0318 0.0161 4.82 0.00 0.00 0.00 0.00 0.00 4.82 762.48 0.05 24.45 0.02 0.00 0.00 0:35 0.7 0.32 0.56 0.29 0.0318 0.0161 4.82 0.00 0.00 0.00 0.00 0.00 4.82 764.04 0.05 29.21 0.02 0.00 0.00 0:40 0.7 0.32 0.56 0.29 0.0318 0.0161 4.82 0.00 0.00 0.00 0.00 0.00 4.82 765.61 0.05 33.97 0.02 0.00 0.00 0:45 0.7 0.32 0.56 0.29 0.0318 0.0161 4.82 0.00 0.00 0.00 0.00 0.00 4.82 767.18 0.05 38.73 0.03 0.00 0.00 0:50 0.7 0.32 0.56 0.29 0.0318 0.0161 4.82 0.00 0.00 0.00 0.00 0.00 4.82 768.74 0.05 43.50 0.03 0.00 0.00 0:55 0.7 0.32 0.56 0.29 0.0318 0.0161 4.82 0.00 0.00 0.00 0.00 0.00 4.82 770.31 0.05 48.26 0.03 0.00 0.00 1:00 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 771.88 0.05 53.71 0.04 0.00 0.00 1:05 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 773.67 0.05 59.16 0.04 0.00 0.00 1:10 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 775.46 0.05 64.61 0.05 0.00 0.00 1:15 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 777.26 0.05 70.05 0.05 0.00 0.00 1:20 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 779.05 0.05 75.50 0.05 0.00 0.00 1:25 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 780.84 0.05 80.95 0.06 0.00 0.00 1:30 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 782.64 0.05 86.40 0.06 0.00 0.00 1:35 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 784.43 0.05 91.85 0.07 0.00 0.00 1:40 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 786.22 0.05 97.30 0.07 0.00 0.00 1:45 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 788.01 0.05 102.75 0.07 0.00 0.00 1:50 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 789.81 0.05 108.19 0.08 0.00 0.00 1:55 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 791.60 0.05 113.64 0.08 0.00 0.00 2:00 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 793.39 0.06 119.78 0.09 0.00 0.00 2:05 0.8 0.36 0.56 0.33 0.0364 0.0183 5.50 0.00 0.00 0.00 0.00 0.00 5.50 795.41 0.06 125.23 0.09 0.00 0.00 2:10 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 797.20 0.06 131.36 0.10 0.00 0.00 2:15 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 799.22 0.06 137.50 0.10 0.00 0.00 2:20 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 801.24 0.06 143.63 0.10 0.00 0.00 2:25 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 803.26 0.06 149.77 0.11 0.00 0.00 2:30 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 805.28 0.06 155.90 0.11 0.00 0.00 2:35 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 807.30 0.06 162.04 0.12 0.00 0.00 2:40 0.9 0.41 0.56 0.37 0.0409 0.0206 6.19 0.00 0.00 0.00 0.00 0.00 6.19 809.32 0.06 168.17 0.12 0.00 0.00 2:45 1 0.45 0.56 0.41 0.0455 0.0229 6.88 0.00 0.00 0.00 0.00 0.00 6.88 811.33 0.06 175.00 0.13 0.00 0.00 2:50 1 0.45 0.56 0.41 0.0455 0.0229 6.88 0.00 0.00 0.00 0.00 0.00 6.88 813.58 0.06 181.82 0.13 0.00 0.00 2:55 1 0.45 0.56 0.41 0.0455 0.0229 6.88 0.00 0.00 0.00 0.00 0.00 6.88 815.82 0.06 188.64 0.14 0.00 0.00 3:00 1 0.45 0.56 0.41 0.0455 0.0229 6.88 0.00 0.00 0.00 0.00 0.00 6.88 818.07 0.06 195.46 0.14 0.00 0.00 3:05 1 0.45 0.56 0.41 0.0455 0.0229 6.88 0.00 0.00 0.00 0.00 0.00 6.88 820.31 0.06 202.28 0.15 0.00 0.00 3:10 1.1 0.50 0.56 0.45 0.0500 0.0252 7.57 0.00 0.00 0.00 0.00 0.00 7.57 822.56 0.06 209.79 0.15 0.00 0.00 3:15 1.1 0.50 0.56 0.45 0.0500 0.0252 7.57 0.00 0.00 0.00 0.00 0.00 7.57 825.03 0.06 217.30 0.16 0.00 0.00 3:20 1.1 0.50 0.56 0.45 0.0500 0.0252 7.57 0.00 0.00 0.00 0.00 0.00 7.57 827.50 0.06 224.81 0.16 0.00 0.00 3:25 1.2 0.55 0.56 0.49 0.0546 0.0275 8.25 0.00 0.00 0.00 0.00 0.00 8.25 829.97 0.06 233.01 0.17 0.00 0.00 3:30 1.3 0.59 0.56 0.53 0.0591 0.0298 8.94 0.00 0.00 0.00 0.00 0.00 8.94 832.67 0.06 241.89 0.18 0.00 0.00 3:35 1.4 0.64 0.56 N/A 0.0739 0.0372 11.17 0.00 0.00 0.00 0.00 0.00 11.17 835.59 0.06 253.01 0.18 0.00 0.00 3:40 1.4 0.64 0.56 N/A 0.0739 0.0372 11.17 0.00 0.00 0.00 0.00 0.00 11.17 839.25 0.06 264.12 0.19 0.00 0.00 3:45 1.5 0.68 0.56 N/A 0.1194 0.0602 18.05 0.00 0.00 0.00 0.00 0.00 18.05 842.91 0.06 282.12 0.20 0.00 0.00 3:50 1.5 0.68 0.56 N/A 0.1194 0.0602 18.05 0.00 0.00 0.00 0.00 0.00 18.05 848.83 0.06 300.11 0.22 0.00 0.00 3:55 1.6 0.73 0.56 N/A 0.1648 0.0831 24.93 0.00 0.00 0.00 0.00 0.00 24.93 854.75 0.06 324.98 0.24 0.00 0.00 4:00 1.6 0.73 0.56 N/A 0.1648 0.0831 24.93 0.00 0.00 0.00 0.00 0.00 24.93 862.93 0.06 349.86 0.25 0.00 0.00 4:05 1.7 0.77 0.56 N/A 0.2103 0.1060 31.81 0.00 0.00 0.00 0.00 0.00 31.81 871.11 0.06 381.61 0.28 0.00 0.00 4:10 1.8 0.82 0.56 N/A 0.2558 0.1290 38.69 0.00 0.00 0.00 0.00 0.00 38.69 881.56 0.06 420.23 0.30 0.00 0.00 4:15 1.9 0.86 0.56 N/A 0.3013 0.1519 45.57 0.00 0.00 0.00 0.00 0.00 45.57 894.27 0.06 465.74 0.34 0.00 0.00 448

Rancho Mirage City CouncilDecember 4, 2025

Rancho Mirage City Council
December 4, 2025