Agenda packet — American Canyon City Council, November 19, 2024 (part 14 of 16)

I. Introduction
This report demonstrates that the proposed on-site storm drains, drop inlets, and spillways have sufficient capacity to convey stormwater, as intended, for the SDG Commerce 220 Distribution Center project.

II. Off Site Stormwater Run-on
Stormwater run-on to the site is generated by 12.7 acres of up-slope tributary east of the project site. The area is undeveloped with slopes ranging from 5 - 20%. Three existing culverts convey run-on across Commerce Boulevard. Approximately 1/3 of the project run-on will follow existing drainage paths through a series of mapped wetlands and will not be treated or detained in the detention pond. This portion of the run-on will be routed and discharged towards the northwest corner of the property. The remaining 2/3 of the run-on will be routed through the on-site storm drain system to the detention pond. The runoff is ultimately conveyed to the North Slough.

III. Methodology
Hydraulic calculations are included for all stormwater conveyance systems on the proposed site. The storm drain pipe network & conveyance systems have been designed for the 10-year design storm event without surcharge per City of American Canyon standards. Drain inlets, outlets, and spillways are designed for the 100-year design storm. The storm drain network was modeled using Storm & Sanitary Analysis (SSA) while the capacity of the other structures were determined using hydraulic equations pertaining to that structure. A time of concentration of 6 minutes has been assumed for all developed areas, see On-site Hydraulic Calculation in Attachment 1. Additionally, a hydraulic grade line analysis has been performed for all storm drains during the 10-year, 24-hour storm event, see 10-year HGL Analysis in Attachment 2. The maximum water elevation for the 10-year storm in the Detention Pond was used as the tailwater for the storm drain system. There was no tailwater elevation for the outfall conditions to the west to the property.

Refer to Use Permit Plans for grading and drainage design. See Proposed Conditions Hydrology Exhibit and schematic maps attached in On-site Hydraulic Calculation in Attachment 1.

IV. Storm Drain Hydraulics
The sites storm drains range from 8 to 30 inches. All storm drains flow by gravity to their designated outfalls. Each storm drain is designed to convey the 10-year and 100-year storm event for the area captured by the storm drain. Autodesk SSA was used to model the storm drain network and determine the capacity of proposed storm drain system.

Mannings Equation: Q = VA = [(k/n)(Rh
2/3)(S1/2)](A)
k = 1.49 n = 0.012 (Smooth Walled Corrugated Polyethylene Pipe) 2471
Hydraulic Calculations
SDG Commerce 220 Distribution Center

Page 2 of 3 ends

Rh = Varies S = Varies
A = Varies
The SSA model produced profiles of the hydraulic grade line (HGL) for the 10-year design storm event. The profile of the HGL shows the system is adequately sized for the 10-year storm event, see 10-year HGL Analysis in Attachment 2.

V. DI Hydraulics
The drop inlets will capture sheet flow runoff from paved areas around the site. The drop inlets are 36-inch by 36-inch and 48-inch by 48-inch. The peak flows from the areas flowing to each drop inlet were modeled in Autodesk SSA and have been included in Attachment 2. Based on the attached weir hydraulics and the 100-yr peak flows, none of the drain inlets are calculated to exceed one (1) inch of head on the inlets during the 100-yr peak flows.

Weir Equation: Q = 3.3P(h1.5)  h = [Q/(3.3P)]2/3
Qmax 36x36 = 0.50 cfs (from subbasin B21)
Qmax 48x48 = 0.50 cfs (from subbasin B22)
P = 77% of total grate perimeter
VI. Spillway Hydraulics
The detention pond will require a spillway for emergency overflows and an overland release route for the detention pond. The Ogee Spillway calculation was used to determine the spillway flow rates. The maximum capacity of a 15’ wide, 1.8’ high spillway (height based on spillway elevation to top of pond) is 142.2 cfs. The peak flows from the 100-yr storm are calculated to be

23.9 cfs. Therefore, the spillway would have sufficient capacity for overland release of the 100- yr peak flows.

Ogee Spillway Equation: Q = Cd(2g)1/2(Hd)
3/2
Cd = From attached chart g = 32.2 ft/sec2 Hd = 1.8 ft
Q100-yr Post-Detained = 23.9 cfs
VII. Level Spreader Hydraulics
There are five 24” diameter, 20‘ long level spreaders that inlet to the detention pond. Each inflow level spreader has sufficient hydraulic capacity for the calculated flows, which were modeled in Autodesk SSA. The total inflow into the detention pond is 23.9 cfs. 2472
Hydraulic Calculations
SDG Commerce 220 Distribution Center

Page 3 of 3 ends

There are four 24” diameter, 60’ long level spreaders proposed for the detention pond overflow structures. Each overflow level spreader receives 4.3 cfs from the detention pond and has sufficient hydraulic capacity for the calculated flows, which were also modeled in Autodesk SSA.

The total outflow from the detention pond is 17.07 cfs. Refer to the Level Spreader Hydraulics in Attachment 2 for a summary of flows to each level spreader.

The Francis formula was used to determine the level spreader outflow rates.

Francis Formula
Rectangular Weir Equation: Q = 3.33 (b-0.2h)(h)3/2
b = width of weir h= height of water above weir
VIII. Run-on Hydraulics
The run-on from the upslope tributary area, east of Commerce Boulevard is collected will be capture by swales and conveyed under Commerce Boulevard by three existing concrete culverts. Approximately 1/3 of the project run-on will be routed through the north undisturbed area of the site via surface flow and will not be treated or detained in the detention pond. This portion of the run-on will be routed and discharged towards the northwest corner of the property. Two (2) 18” storm drain pipes route this run-on. The hydraulic grade line analysis has been performed for the storm drains during the 10-year, 24-hour storm event, see 10-year HGL Analysis in Attachment 2.

IX. Conclusion
The stormwater conveyance systems for the SDG Commerce 220 Distribution Center have been designed to satisfy the City of American Canyon ESPS. All stormwater structures and conveyance systems have been designed to accommodate flows during the 10-yr design storm event. Additionally , the project provides appropriate overland release routes where the storm drain system has not been designed to accommodate the 100-year flows. 2473
Hydraulic Calculations
SDG Commerce 220 Distribution Center
ATTACHMENT 1

ON-SITE HYDRAULIC CALCULATIONS
2474
RSA | CONSULTING CIVIL ENGINEERS + SURVEYORS + +
1980
est.
1515 FOURTH STREET
NAPA, CALIF. 94559
OFFICE
www.RSAcivil.com
| 252.3301 707| + +

AMERICAN CANYON CALIFORNIA

V I C I N I T Y M A P
SDG COMMERCE 220 DISTRIBUTION CENTER
2475
Hydrologic Soil Group—Napa County, California
(SDG Commerce 220 - Distribution Center)
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
3/8/2023

Page 1 of 4 ends

4226510 4226580 4226650 4226720 4226790 4226860 4226930 4226510 4226580 4226650 4226720 4226790 4226860 4226930 563400 563470 563540 563610 563680 563750 563820 563890 563960 564030 564100 563400 563470 563540 563610 563680 563750 563820 563890 563960 564030 564100 38° 11' 17'' N
122° 16' 34'' W
38° 11' 17'' N
122° 16' 4'' W
38° 11' 2'' N
122° 16' 34'' W
38° 11' 2'' N N 122° 16' 4'' W
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 10N WGS84 0 150 300 600 900
Feet
0 45 90 180 270
Meters
Map Scale: 1:3,370 if printed on A landscape (11" x 8.5") sheet.

Soil Map may not be valid at this scale.
2476

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: Napa County, California
Survey Area Data: Version 15, Sep 1, 2022
Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.

Date(s) aerial images were photographed: Mar 26, 2022—Apr 25, 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—Napa County, California
(SDG Commerce 220 - Distribution Center)
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
3/8/2023

Page 2 of 4 ends

Hydrologic Soil Group
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 131 Fagan clay loam, 5 to 15
percent slopes
C 2.6 10.9%
134 Fagan clay loam, 30 to
50 percent slopes,
slipped
C 0.6 2.6%
148 Haire clay loam, 2 to 9
percent slopes
D 20.6 86.5%
Totals for Area of Interest 23.8 100.0%
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.

Hydrologic Soil Group—Napa County, California SDG Commerce 220 - Distribution Center
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
3/8/2023

Page 3 of 4 ends

2478
Rating Options
Aggregation Method: Dominant Condition
Component Percent Cutoff: None Specified
Tie-break Rule: Higher
Hydrologic Soil Group—Napa County, California SDG Commerce 220 - Distribution Center
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
3/8/2023

Page 4 of 4 ends

2479
Saturated Hydraulic Conductivity (Ksat)—Napa County, California (SDG Commerce 220 - Distribution Center)
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
3/14/2023

Page 1 of 3 ends

Soil Map may not be valid at this scale.
2480

MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Rating Polygons
= 2.7000
Not rated or not available
Soil Rating Lines
= 2.7000
Not rated or not available
Soil Rating Points
= 2.7000
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.

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: Napa County, California
Survey Area Data: Version 15, Sep 1, 2022
Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.

Saturated Hydraulic Conductivity (Ksat)—Napa County, California (SDG Commerce 220 - Distribution Center)
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
3/14/2023

Page 2 of 3 ends

Saturated Hydraulic Conductivity (Ksat)
Map unit symbol Map unit name Rating (micrometers
per second)
Acres in AOI Percent of AOI
131 Fagan clay loam, 5 to 15
percent slopes

2.7000 2.6 10.9%
134 Fagan clay loam, 30 to
50 percent slopes,
slipped

2.7000 0.6 2.6%
148 Haire clay loam, 2 to 9
percent slopes

2.7000 20.6 86.5%
Totals for Area of Interest 23.8 100.0%
Description
Saturated hydraulic conductivity (Ksat) refers to the ease with which pores in a saturated soil transmit water. The estimates are expressed in terms of micrometers per second. They are based on soil characteristics observed in the field, particularly structure, porosity, and texture. Saturated hydraulic conductivity is considered in the design of soil drainage systems and septic tank absorption fields.

For each soil layer, this attribute is actually recorded as three separate values in the database. A low value and a high value indicate the range of this attribute for the soil component. A "representative" value indicates the expected value of this attribute for the component. For this soil property, only the representative value is used.

The numeric Ksat values have been grouped according to standard Ksat class limits.

Rating Options
Units of Measure: micrometers per second
Aggregation Method: Dominant Component
Component Percent Cutoff: None Specified
Tie-break Rule: Fastest
Interpret Nulls as Zero: No
Layer Options (Horizon Aggregation Method): Surface Layer (Not applicable) Saturated Hydraulic Conductivity (Ksat)—Napa County, California SDG Commerce 220 - Distribution Center
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
3/14/2023

Page 3 of 3 ends

2482
National Flood Hazard Layer FIRMette
0 250 500 1,000 1,500 2,000
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 SCREENArea 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 11/16/2022 at 2:41 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
122°16'44"W 38°11'22"N
122°16'7"W 38°10'53"N
Basemap: USGS National Map: Orthoimagery: Data refreshed October, 2020 2483
2484
2485
2486
2487
2488
2489
2490
2491
RSA | CONSULTING CIVIL ENGINEERS + SURVEYORS + + 1980 est. 1515 FOURTH STREET
NAPA, CALIF. 94559
OFFICE
www.RSAcivil.com
| 252.3301 707|
+ +
SDG COMMERCE 220 DISTRIBUTION CENTER

PROPOSED CONDITIONS HYDROLOGY EXHIBIT

AMERICAN CANYON CALIFORNIA
2492
RSA | CONSULTING CIVIL ENGINEERS + SURVEYORS + +
1980
est.
1515 FOURTH STREET
NAPA, CALIF. 94559
OFFICE
www.RSAcivil.com
| 252.3301 707| + +
SDG COMMERCE 220 DISTRIBUTION EXHIBIT
100-YR OVERLAND RELEASE EXHIBIT

AMERICAN CANYONCALIFORNIA
2493
2494
2495
SDG COMMERCE 220 DISTRIBUTION CENTER
100-Year DI Hydraulics
P 77% of Total Perimeter (ft)
h Weir Flow Height (ft)
Length (in) Width (in)
Grate
Perimeter (ft2)
Q100 (cfs) Head On
Grate (in)
Head On
Grate (ft)
Qcapacity (cfs)
1 0.08 0.73
2 0.17 2.07
3 0.25 3.81
1 0.08 0.98
2 0.17 2.77
3 0.25 5.08
Qcapacity = 3.3P(h1.5)
48 48
36 36 12
16 0.5

0.5 DI Hydraulics
2496
2497
SDG COMMERCE 220 DISTRIBUTION CENTER
100-Year Spillway Hydraulics
g 32.2 (ft/sec2
)
Spillway Length (ft) HD (ft) P (ft) CD Qcapacity (cfs) Qactual (cfs)* 1 15 1.8 3.2 0.489 142.15 23.90
* Flow rate from Detention Hydrographs
Spillway Hydraulics
𝑄 = 𝐶஽ 2𝑔𝐿𝐻஽
ଷ/ଶ
2498
SDG COMMERCE 220 DISTRIBUTION CENTER
100-Year Level Spread Calcs
Sharp-Crested Weir
Q=3.33(b-0.2h)h^3/2 b= width of weir = D
BRB Inflow 1 Out-1E16-Pipe 24 20 24 3 5.20 5.00 16
BRB Inflow 2 D3-Structure 24 20 24 3 0.70 1.30 16
BRB Inflow 3 Out-1C2-Pipe 24 20 24 3 0.80 1.40 16
BRB Inflow 4 Out-1B1-Pipe 24 20 24 3 0.50 1.00 16
BRB Inflow 5 Out-1A15-Pipe 24 20 24 3 17.00 11.50 16
BRB Overflow 1 Out-1D4-Pipe 24 60 24 13 4.30 1.65 16
BRB Overflow 2 Out-1Pipe (53) 24 60 24 13 4.30 1.65 16
BRB Overflow 3 Out-1Pipe (59) 24 60 24 13 4.30 1.65 16
BRB Overflow 4 Out-1Pipe (62) 24 60 24 13 4.30 1.65 16
Assumptions:
100-Year Level Spreader Calcs
-Width of weir is equal to the diameter of Level Spreader(LS) -Spacing between weirs is equal to the diameter of LS
-Height of weir is equal to 2/3 the diameter of LS
-Maximum # of weir openings account for Tee fitting from inlet pipe of same size as level spreader. Remaining length is used at the ends.

Location
hopening
(in) D (in) h (in)
LS
Diameter
(in)
LS Length
(ft)
Number
of Weir
Openings
Q(cfs)
2499
2500
Hydraulic Calculations
SDG Commerce 220 Distribution Center
ATTACHMENT 2
10-YEAR HGL ANALYSIS
2501
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Project Description
SDG 220 Post.SPF
Project Options
CFS
Elevation
SCS TR-55
SCS TR-55
Kinematic Wave
YES
YES
Analysis Options
Mar 13, 2023 00:00:00
Mar 14, 2023 00:00:00
Mar 13, 2023 00:00:00
0 days
0 01:00:00 days hh:mm:ss
0 00:05:00 days hh:mm:ss
0 00:00:30 days hh:mm:ss
30 seconds
Rainfall Details
SN Rain Gage Data Data Source Rainfall Rain State County Return Rainfall Rainfall ID Source ID Type Units Period Depth Distribution
(years) (inches)
1 Time Series TS- 100yr Cumulative inches None None 100 7.36 SCS Type IA 24-hr Runoff (Dry Weather) Time Step ................

Runoff (Wet Weather) Time Step ...............

Reporting Time Step ...................................

Routing Time Step ......................................

Enable Overflow Ponding at Nodes ............

Skip Steady State Analysis Time Periods ...

Start Analysis On ........................................

End Analysis On ..........................................

Start Reporting On ......................................

Antecedent Dry Days ..................................

File Name ....................................................

Flow Units ...................................................

Elevation Type ............................................

Hydrology Method .......................................

Time of Concentration (TOC) Method ........

Link Routing Method ................................... 10 Year Storm Analysis
Post-Development
User: RRG Page 1 of 50 2502
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin Summary
SN Subbasin Area Peak Rate Weighted Total Total Total Peak Time of ID Factor Curve Rainfall Runoff Runoff Runoff Concentration Number Volume
(ac) (in) (in) (ac-in) (cfs) (days hh:mm:ss)
1 A01 5.17 484.00 81 4.47 2.56 13.22 3.2 0 00:15:27
2 A02 4.02 484.00 81 4.47 2.53 10.17 2.4 0 00:16:18
3 A03 4.49 484.00 83 4.47 2.67 12.01 2.8 0 00:18:52
4 B01 0.22 484.00 98 4.47 4.23 0.94 0.2 0 00:06:00
5 B02 0.23 484.00 98 4.47 4.23 0.96 0.3 0 00:06:00
6 B03 0.33 484.00 98 4.47 4.23 1.39 0.4 0 00:06:00
7 B04 0.33 484.00 98 4.47 4.23 1.38 0.4 0 00:06:00
8 B05 0.36 484.00 98 4.47 4.23 1.52 0.4 0 00:06:00
9 B06 0.36 484.00 98 4.47 4.23 1.53 0.4 0 00:06:00
10 B07 0.46 484.00 98 4.47 4.23 1.95 0.5 0 00:06:00
11 B08 0.23 484.00 98 4.47 4.23 0.98 0.3 0 00:06:00
12 B09 0.22 484.00 98 4.47 4.23 0.94 0.2 0 00:06:00
13 B10 0.16 484.00 98 4.47 4.23 0.68 0.2 0 00:06:00
14 B11 0.25 484.00 98 4.47 4.23 1.07 0.3 0 00:06:00
15 B12 0.49 484.00 98 4.47 4.23 2.06 0.5 0 00:06:00
16 B13 0.38 484.00 98 4.47 4.23 1.62 0.4 0 00:06:00
17 B14 0.32 484.00 98 4.47 4.23 1.37 0.4 0 00:06:00
18 B15 0.35 484.00 98 4.47 4.23 1.49 0.4 0 00:06:00
19 B16 0.17 484.00 98 4.47 4.23 0.71 0.2 0 00:06:00
20 B17 0.19 484.00 98 4.47 4.23 0.79 0.2 0 00:06:00
21 B18 0.11 484.00 98 4.47 4.23 0.46 0.1 0 00:06:00
22 B19 0.21 484.00 98 4.47 4.23 0.90 0.2 0 00:06:00
23 B20 0.24 484.00 98 4.47 4.23 1.00 0.3 0 00:06:00
24 B21 0.26 484.00 98 4.47 4.23 1.11 0.3 0 00:06:00
25 B22 0.27 484.00 98 4.47 4.23 1.15 0.3 0 00:06:00
26 B23 0.23 484.00 98 4.47 4.23 0.98 0.3 0 00:06:00
27 B24 0.14 484.00 98 4.47 4.23 0.58 0.1 0 00:06:00
28 B25 0.16 484.00 98 4.47 4.23 0.68 0.2 0 00:06:00
29 B26 0.08 484.00 98 4.47 4.23 0.34 0.1 0 00:06:00
30 B27 0.04 484.00 98 4.47 4.23 0.17 0.0 0 00:06:00
31 B28 0.08 484.00 98 4.47 4.23 0.34 0.1 0 00:06:00
32 B29 0.06 484.00 98 4.47 4.23 0.25 0.1 0 00:06:00
33 B30 0.04 484.00 98 4.47 4.23 0.17 0.0 0 00:06:00
34 B31 0.04 484.00 98 4.47 4.23 0.17 0.0 0 00:06:00
35 B32 0.04 484.00 98 4.47 4.23 0.17 0.0 0 00:06:00
36 B33 0.09 484.00 98 4.47 4.23 0.38 0.1 0 00:06:00
37 B34 0.10 484.00 98 4.47 4.23 0.41 0.1 0 00:06:00
38 B35 0.04 484.00 98 4.47 4.23 0.17 0.0 0 00:06:00
39 B36 0.09 484.00 98 4.47 4.23 0.39 0.1 0 00:06:00
40 B37 0.17 484.00 98 4.47 4.23 0.72 0.2 0 00:06:00
41 B38 0.13 484.00 98 4.47 4.23 0.54 0.1 0 00:06:00
42 C01 1.09 484.00 72 4.47 1.80 1.96 0.4 0 00:05:00
43 C02 0.28 484.00 72 4.47 1.80 0.50 0.1 0 00:29:07
44 C03 0.29 484.00 72 4.47 1.80 0.52 0.1 0 00:16:48
45 D01 0.48 484.00 98 4.47 4.23 2.05 0.5 0 00:06:00
46 D02 0.41 484.00 98 4.47 4.23 1.75 0.4 0 00:06:00
47 D03 0.65 484.00 98 4.47 4.23 2.75 0.7 0 00:06:00
48 D04 0.78 484.00 98 4.47 4.23 3.30 0.8 0 00:06:00
49 D05 0.44 484.00 98 4.47 4.23 1.87 0.5 0 00:06:00
50 D06 0.56 484.00 98 4.47 4.23 2.36 0.6 0 00:06:00
51 D07 0.29 484.00 98 4.47 4.23 1.23 0.3 0 00:06:00
10 Year Storm Analysis
Post-Development
User: RRG Page 2 of 50 2503
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Node Summary
SN Element Element Invert Ground/Rim Initial Surcharge Ponded Peak Max HGL Max Min Time of Total Total Time ID Type Elevation (Max) Water Elevation Area Inflow Elevation Surcharge Freeboard Peak Flooded Flooded Elevation Elevation Attained Depth Attained Flooding Volume Attained Occurrence
(ft) (ft) (ft) (ft) (ft²) (cfs) (ft) (ft) (ft) (days hh:mm) (ac-in) (min) 1 A1.1-Structure Junction 19.10 21.00 19.10 21.00 0.00 0.2 19.24 0.00 1.77 0 00:00 0.00 0.00 2 A1-Structure Junction 16.03 37.64 16.03 37.64 0.00 2.7 18.46 0.00 19.18 0 00:00 0.00 0.00 3 A2.1-Structure Junction 19.10 21.00 19.10 21.00 0.00 0.2 19.26 0.00 1.74 0 00:00 0.00 0.00 4 A2-Structure Junction 15.56 20.55 15.56 20.55 0.00 3.1 18.38 0.00 2.16 0 00:00 0.00 0.00 5 A3-Structure Junction 15.13 19.11 15.13 19.11 0.00 3.3 15.87 0.00 3.25 0 00:00 0.00 0.00 6 A4-Structure Junction 14.86 20.27 14.86 20.27 0.00 6.1 17.05 0.00 3.22 0 00:00 0.00 0.00 7 A5-Structure Junction 13.86 20.07 13.86 20.07 0.00 6.5 18.47 0.00 1.60 0 00:00 0.00 0.00 8 B1-Structure Junction 12.20 20.13 12.20 20.13 0.00 0.3 12.30 0.00 7.83 0 00:00 0.00 0.00 9 C1-Structure Junction 19.10 21.00 19.10 21.00 0.00 0.2 19.26 0.00 1.74 0 00:00 0.00 0.00 10 C2-Structure Junction 12.20 36.86 12.20 36.86 0.00 0.5 18.37 0.00 18.49 0 00:00 0.00 0.00 11 D1-Structure Junction 19.10 21.00 19.10 21.00 0.00 0.2 19.25 0.00 1.76 0 00:00 0.00 0.00 12 D2-Structure Junction 12.20 38.65 12.20 38.65 0.00 0.4 18.36 0.00 20.29 0 00:00 0.00 0.00 13 D3-Structure Junction 10.50 16.50 10.50 13.25 0.00 0.4 10.62 0.00 5.88 0 00:00 0.00 0.00 14 D4-Structure Junction 10.63 13.10 10.63 14.00 0.00 2.7 11.30 0.00 1.80 0 00:00 0.00 0.00 15 E10.1-Structure Junction 19.10 21.07 19.10 21.07 0.00 0.4 19.29 0.00 1.78 0 00:00 0.00 0.00 16 E10-Structure Junction 12.29 20.26 12.29 20.26 0.00 2.0 18.64 0.00 1.62 0 00:00 0.00 0.00 17 E11-Structure Junction 11.95 20.26 11.95 20.26 0.00 2.1 12.48 0.00 7.78 0 00:00 0.00 0.00 18 E13.1-Structure Junction 19.10 21.07 19.10 21.07 0.00 0.4 19.30 0.00 1.77 0 00:00 0.00 0.00 19 E13-Structure Junction 11.61 20.26 11.61 20.26 0.00 2.6 18.72 0.00 1.54 0 00:00 0.00 0.00 20 E14.2-Structure Junction 19.10 21.07 19.10 21.07 0.00 0.2 19.24 0.00 1.83 0 00:00 0.00 0.00 21 E14-Structure Junction 11.22 20.25 11.22 20.25 0.00 2.8 18.60 0.00 1.65 0 00:00 0.00 0.00 22 E15-Structure Junction 10.79 20.25 10.79 20.25 0.00 3.0 11.53 0.00 8.72 0 00:00 0.00 0.00 23 E16-Structure Junction 10.62 20.13 10.62 20.13 0.00 3.1 11.36 0.00 8.77 0 00:00 0.00 0.00 24 E1-Structure Junction 15.10 19.22 15.10 19.22 0.00 0.1 15.22 0.00 4.00 0 00:00 0.00 0.00 25 E2-Structure Junction 14.73 20.26 14.73 20.26 0.00 0.1 14.88 0.00 5.38 0 00:00 0.00 0.00 26 E4.1-Structure Junction 19.10 21.08 19.10 21.08 0.00 0.3 19.27 0.00 1.81 0 00:00 0.00 0.00 27 E4-Structure Junction 14.45 20.30 14.45 20.30 0.00 0.1 14.60 0.00 5.70 0 00:00 0.00 0.00 28 E5-Structure Junction 14.37 20.09 14.37 20.09 0.00 0.5 18.59 0.00 1.50 0 00:00 0.00 0.00 29 E6-Structure Junction 14.02 20.20 14.02 20.20 0.00 0.6 14.32 0.00 5.88 0 00:00 0.00 0.00 30 E7.1-Structure Junction 19.10 21.07 19.10 21.07 0.00 0.5 19.33 0.00 1.74 0 00:00 0.00 0.00 31 E7-Structure Junction 13.23 20.26 13.23 20.26 0.00 1.1 18.68 0.00 1.58 0 00:00 0.00 0.00 32 E8-Structure Junction 12.93 20.26 12.93 20.26 0.00 1.2 13.32 0.00 6.94 0 00:00 0.00 0.00 33 E9.1-Structure Junction 19.10 21.07 19.10 21.07 0.00 0.4 19.31 0.00 1.76 0 00:00 0.00 0.00 34 E9-Structure Junction 12.62 20.26 12.62 20.26 0.00 1.6 18.81 0.00 1.45 0 00:00 0.00 0.00 35 Jun-01 Junction 0.00 10.50 0.00 0.00 0.00 3.9 0.00 0.00 10.50 0 00:00 0.00 0.00 36 Jun-02 Junction 0.00 6.00 0.00 6.00 0.00 3.2 32.46 0.00 1.04 0 00:00 0.00 0.00 37 Jun-03 Junction 0.00 6.00 0.00 6.00 0.00 3.2 30.46 0.00 1.04 0 00:00 0.00 0.00 38 Jun-04 Junction 19.20 6.00 0.00 6.00 0.00 3.6 19.20 0.00 0.00 0 00:00 0.00 0.00 39 Jun-05 Junction 18.20 6.00 0.00 6.00 0.00 3.6 18.78 0.00 0.92 0 00:00 0.00 0.00 40 Jun-06 Junction 14.60 6.00 0.00 6.00 0.00 3.7 14.60 0.00 0.00 0 00:00 0.00 0.00 41 Jun-07 Junction 13.20 6.00 0.00 6.00 0.00 3.8 13.73 0.00 0.97 0 00:00 0.00 0.00 42 Jun-08 Junction 19.20 6.00 0.00 6.00 0.00 3.6 19.78 0.00 0.92 0 00:00 0.00 0.00 43 Jun-09 Junction 14.60 6.00 0.00 0.00 0.00 3.7 15.13 0.00 0.97 0 00:00 0.00 0.00 44 Out-1A15-Pipe Junction 10.50 16.50 10.50 16.50 0.00 8.8 11.54 0.00 4.96 0 00:00 0.00 0.00 45 Out-1B1-Pipe Junction 10.50 16.50 10.50 16.50 0.00 0.3 10.60 0.00 5.90 0 00:00 0.00 0.00 46 Out-1C2-Pipe Junction 10.50 16.50 10.50 16.50 0.00 0.5 10.63 0.00 5.87 0 00:00 0.00 0.00 47 Out-1D4-Pipe Junction 10.50 16.50 10.50 16.50 0.00 2.7 11.17 0.00 5.33 0 00:00 0.00 0.00 48 Out-1E16-Pipe Junction 10.50 16.50 10.50 0.00 0.00 3.1 11.16 0.00 5.34 0 00:00 0.00 0.00 49 Out-1Pipe (53) Junction 10.50 16.50 10.50 16.50 0.00 2.7 11.10 0.00 5.40 0 00:00 0.00 0.00 50 Out-1Pipe (59) Junction 10.50 16.50 10.50 16.50 0.00 2.7 11.17 0.00 5.33 0 00:00 0.00 0.00 51 Out-1Pipe (62) Junction 10.50 16.50 10.50 16.50 0.00 2.7 11.17 0.00 5.33 0 00:00 0.00 0.00 52 Structure - 100 Junction 19.10 19.83 19.10 19.83 0.00 0.4 19.30 0.00 0.53 0 00:00 0.00 0.00 53 Structure - 101 Junction 11.91 19.47 11.91 19.47 0.00 8.0 18.60 0.00 0.87 0 00:00 0.00 0.00 54 Structure - 102 Junction 19.10 19.83 19.10 19.83 0.00 0.4 19.30 0.00 0.53 0 00:00 0.00 0.00 55 Structure - 103 Junction 11.59 19.48 11.59 19.48 0.00 8.3 18.60 0.00 0.88 0 00:00 0.00 0.00 56 Structure - 104 Junction 19.10 19.83 19.10 19.83 0.00 0.3 19.28 0.00 0.54 0 00:00 0.00 0.00 57 Structure - 105 Junction 11.09 19.41 11.09 19.41 0.00 8.5 18.49 0.00 0.91 0 00:00 0.00 0.00 58 Structure - 35 Junction 10.76 18.50 10.76 18.50 0.00 8.5 11.79 0.00 6.72 0 00:00 0.00 0.00 59 Structure - 36 Junction 10.59 20.13 10.59 20.13 0.00 8.8 11.63 0.00 8.50 0 00:00 0.00 0.00 60 Structure - 38 Junction 28.60 31.31 28.60 31.31 0.00 2.4 29.15 0.00 2.16 0 00:00 0.00 0.00 61 Structure - 39 Junction 27.61 32.57 27.61 32.57 0.00 2.4 28.77 0.00 3.79 0 00:00 0.00 0.00 62 Structure - 48 Junction 26.48 1.78 26.48 1.78 0.00 2.8 26.94 0.00 1.04 0 00:00 0.00 0.00 63 Structure - 49 Junction 25.31 29.72 25.31 29.72 0.00 2.8 26.25 0.00 3.47 0 00:00 0.00 0.00 64 Structure - 75 Junction 10.63 13.10 10.63 14.00 0.00 2.7 11.23 0.00 1.87 0 00:00 0.00 0.00 65 Structure - 83 Junction 10.63 13.10 10.63 14.00 0.00 2.7 11.30 0.00 1.80 0 00:00 0.00 0.00 66 Structure - 87 Junction 10.63 13.10 10.63 14.00 0.00 2.7 11.30 0.00 1.80 0 00:00 0.00 0.00 67 Structure - 91 Junction 19.10 21.10 19.10 21.10 0.00 0.3 19.27 0.00 1.83 0 00:00 0.00 0.00 68 Structure - 94 Junction 19.10 19.83 19.10 19.83 0.00 0.5 19.36 0.00 0.46 0 00:00 0.00 0.00 69 Structure - 95 Junction 13.30 19.40 13.30 19.40 0.00 6.9 18.67 0.00 0.73 0 00:00 0.00 0.00 70 Structure - 96 Junction 19.10 19.83 19.10 19.83 0.00 0.4 19.33 0.00 0.49 0 00:00 0.00 0.00 71 Structure - 97 Junction 12.86 19.42 12.86 19.42 0.00 7.3 18.64 0.00 0.78 0 00:00 0.00 0.00 72 Structure - 98 Junction 19.10 19.83 19.10 19.83 0.00 0.4 19.33 0.00 0.50 0 00:00 0.00 0.00 73 Structure - 99 Junction 12.39 19.44 12.39 19.44 0.00 7.6 18.63 0.00 0.81 0 00:00 0.00 0.00 74 Out-02 Outfall 0.00 14.2 0.00
75 Detention-Basin Storage Node 10.50 15.50 0.00 12634.80 12.9 11.87 0.00 0.00 10 Year Storm Analysis
Post-Development
User: RRG Page 3 of 50 2504
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Link Summary
SN Element Element From To (Outlet) Length Inlet Outlet Average Diameter or Manning's Peak Design Flow Peak Flow/ Peak Flow Peak Flow Peak Flow Total Time Reported ID Type (Inlet) Node Invert Invert Slope Height Roughness Flow Capacity Design Flow Velocity Depth Depth/ Surcharged Condition Node Elevation Elevation Ratio Total Depth
Ratio
(ft) (ft) (ft) (%) (in) (cfs) (cfs) (ft/sec) (ft) (min) 1 A1.1-Pipe Pipe A1.1-Structure A1-Structure 43.57 19.10 18.23 2.0000 8.000 0.0120 0.2 1.9 0.09 3.32 0.14 0.21 0.00 Calculated 2 A10.1-Pipe Pipe Structure - 100 Structure - 101 34.83 19.10 18.40 2.0000 8.000 0.0120 0.4 1.9 0.19 4.07 0.20 0.29 0.00 Calculated 3 A10-Pipe Pipe Structure - 99 Structure - 101 91.67 12.39 11.91 0.5300 30.000 0.0150 7.6 25.9 0.29 4.59 0.93 0.37 0.00 Calculated 4 A11.1-Pipe Pipe Structure - 102 Structure - 103 34.86 19.10 18.40 2.0000 8.000 0.0120 0.4 1.9 0.19 4.07 0.20 0.29 0.00 Calculated 5 A11-Pipe Pipe Structure - 101 Structure - 103 67.33 11.91 11.59 0.4700 30.000 0.0150 8.0 24.5 0.32 4.45 0.98 0.39 0.00 Calculated 6 A12.1-Pipe Pipe Structure - 104 Structure - 105 39.58 19.10 18.31 2.0000 8.000 0.0150 0.3 1.5 0.17 3.14 0.18 0.28 0.00 Calculated 7 A12-Pipe Pipe Structure - 103 Structure - 105 100.61 11.59 11.09 0.4900 30.000 0.0150 8.3 25.0 0.33 4.56 0.99 0.40 0.00 Calculated 8 A13-Pipe Pipe Structure - 105 Structure - 35 63.49 11.09 10.76 0.5200 30.000 0.0150 8.5 25.7 0.33 4.70 0.99 0.40 0.00 Calculated 9 A14-Pipe Pipe Structure - 35 Structure - 36 37.44 10.76 10.59 0.4500 30.000 0.0150 8.5 24.0 0.35 4.46 1.03 0.41 0.00 Calculated 10 A15-Pipe Pipe Structure - 36 Out-1A15-Pipe 19.67 10.59 10.50 0.4600 30.000 0.0150 8.8 24.1 0.36 4.51 1.04 0.42 0.00 Calculated 11 A1-Pipe Pipe Structure - 39 A1-Structure 32.78 27.61 18.23 28.6100 18.000 0.0150 2.4 48.7 0.05 14.33 0.23 0.15 0.00 Calculated 12 A2.1-Pipe Pipe A2.1-Structure A2-Structure 44.00 19.10 18.22 2.0000 8.000 0.0120 0.2 1.9 0.13 3.66 0.16 0.24 0.00 Calculated 13 A2-Pipe Pipe A1-Structure A2-Structure 97.50 16.03 15.56 0.4800 18.000 0.0150 2.7 6.3 0.43 3.44 0.69 0.46 0.00 Calculated 14 A3-Pipe Pipe A2-Structure A3-Structure 88.50 15.56 15.13 0.4900 18.000 0.0150 3.1 6.4 0.48 3.56 0.74 0.49 0.00 Calculated 15 A4.1-Pipe Pipe Structure - 49 A4-Structure 39.16 25.31 16.82 21.6900 18.000 0.0120 2.8 53.0 0.05 15.95 0.24 0.16 0.00 Calculated 16 A4-Pipe Pipe A3-Structure A4-Structure 56.66 15.13 14.86 0.4800 30.000 0.0150 3.3 24.5 0.13 3.49 0.62 0.25 0.00 Calculated 17 A5-Pipe Pipe A4-Structure A5-Structure 107.77 14.86 13.86 0.9300 30.000 0.0150 6.1 34.3 0.18 5.27 0.72 0.29 0.00 Calculated 18 A6.1-Pipe Pipe Structure - 91 A5-Structure 42.40 19.10 18.31 1.8700 8.000 0.0120 0.3 1.8 0.14 3.60 0.17 0.25 0.00 Calculated 19 A7.1-Pipe Pipe Structure - 94 Structure - 95 34.69 19.10 18.41 2.0000 8.000 0.0150 0.5 1.5 0.33 3.81 0.26 0.40 0.00 Calculated 20 A7-Pipe Pipe A5-Structure Structure - 95 110.61 13.86 13.30 0.5100 30.000 0.0150 6.5 25.3 0.26 4.31 0.86 0.34 0.00 Calculated 21 A8.1-Pipe Pipe Structure - 96 Structure - 97 34.74 19.10 18.41 2.0000 8.000 0.0150 0.4 1.5 0.26 3.58 0.23 0.35 0.00 Calculated 22 A8-Pipe Pipe Structure - 95 Structure - 97 89.33 13.30 12.86 0.4900 30.000 0.0150 6.9 24.9 0.28 4.34 0.90 0.36 0.00 Calculated 23 A9.1-Pipe Pipe Structure - 98 Structure - 99 34.78 19.10 18.40 2.0100 8.000 0.0150 0.4 1.5 0.26 3.57 0.23 0.35 0.00 Calculated 24 A9-Pipe Pipe Structure - 97 Structure - 99 95.00 12.86 12.39 0.4900 30.000 0.0150 7.3 24.9 0.29 4.40 0.93 0.37 0.00 Calculated 25 B1-Pipe Pipe B1-Structure Out-1B1-Pipe 19.69 12.20 10.50 8.6300 24.000 0.0150 0.3 57.6 0.00 4.67 0.10 0.05 0.00 Calculated 26 C1-Pipe Pipe C1-Structure C2-Structure 44.64 19.10 18.21 2.0000 8.000 0.0120 0.2 1.9 0.13 3.66 0.16 0.24 0.00 Calculated 27 C2-Pipe Pipe C2-Structure Out-1C2-Pipe 19.67 12.20 10.50 8.6400 24.000 0.0150 0.5 57.6 0.01 5.59 0.13 0.07 0.00 Calculated 28 D1-Pipe Pipe D1-Structure D2-Structure 44.46 19.10 18.21 2.0000 8.000 0.0120 0.2 1.9 0.11 3.46 0.15 0.22 0.00 Calculated 29 D2-Pipe Pipe D2-Structure D3-Structure 19.67 12.20 10.50 8.6400 24.000 0.0150 0.4 57.6 0.01 5.37 0.12 0.06 0.00 Calculated 30 D4-Pipe Pipe D4-Structure Out-1D4-Pipe 26.30 10.63 10.50 0.4900 18.000 0.0150 2.7 6.4 0.41 3.45 0.67 0.45 0.00 Calculated 31 E10-Pipe Pipe E10-Structure E11-Structure 68.72 12.29 11.95 0.5000 24.000 0.0150 2.0 13.9 0.15 3.16 0.52 0.26 0.00 Calculated 32 E11-Pipe Pipe E11-Structure E13-Structure 67.31 11.95 11.61 0.5000 24.000 0.0150 2.1 13.9 0.15 3.20 0.53 0.27 0.00 Calculated 33 E12.1-Pipe Pipe E13.1-Structure E13-Structure 28.75 19.10 18.52 2.0200 8.000 0.0120 0.4 1.9 0.20 4.17 0.20 0.30 0.00 Calculated 34 E13.1-Pipe Pipe E14.2-Structure E14-Structure 31.82 19.10 18.46 2.0000 8.000 0.0120 0.2 1.9 0.10 3.35 0.14 0.21 0.00 Calculated 35 E13-Pipe Pipe E13-Structure E14-Structure 77.56 11.61 11.22 0.5000 24.000 0.0150 2.6 13.9 0.18 3.36 0.58 0.29 0.00 Calculated 36 E14-Pipe Pipe E14-Structure E15-Structure 88.49 11.22 10.79 0.4900 24.000 0.0150 2.8 13.7 0.21 3.43 0.62 0.31 0.00 Calculated 37 E15-Pipe Pipe E15-Structure E16-Structure 61.58 10.79 10.62 0.2800 24.000 0.0150 3.0 10.3 0.29 2.85 0.74 0.37 0.00 Calculated 38 E16-Pipe Pipe E16-Structure Out-1E16-Pipe 26.19 10.62 10.50 0.4600 24.000 0.0150 3.1 13.3 0.24 3.45 0.66 0.33 0.00 Calculated 39 E1-Pipe Pipe E1-Structure E2-Structure 73.22 15.10 14.73 0.5000 18.000 0.0150 0.1 6.4 0.01 1.29 0.12 0.08 0.00 Calculated 40 E2-Pipe Pipe E2-Structure E4-Structure 55.47 14.73 14.45 0.5000 18.000 0.0150 0.1 6.4 0.02 1.43 0.15 0.10 0.00 Calculated 41 E4-Pipe Pipe E4-Structure E5-Structure 15.97 14.45 14.37 0.5000 18.000 0.0150 0.1 6.3 0.02 1.41 0.15 0.10 0.00 Calculated 42 E5.1-Pipe Pipe E4.1-Structure E5-Structure 32.89 19.10 18.42 2.0800 8.000 0.0120 0.3 1.9 0.14 3.82 0.17 0.25 0.00 Calculated 43 E5-Pipe Pipe E5-Structure E6-Structure 70.61 14.37 14.02 0.5000 18.000 0.0150 0.5 6.4 0.08 2.14 0.28 0.19 0.00 Calculated 44 E6.1-Pipe Pipe E7.1-Structure E7-Structure 28.85 19.10 18.44 2.2800 8.000 0.0120 0.5 2.0 0.26 4.77 0.23 0.35 0.00 Calculated 45 E6-Pipe Pipe E6-Structure E7-Structure 58.54 14.02 13.73 0.5000 18.000 0.0150 0.6 6.4 0.08 2.22 0.30 0.20 0.00 Calculated 46 E7-Pipe Pipe E7-Structure E8-Structure 59.55 13.23 12.93 0.5000 24.000 0.0150 1.1 13.9 0.08 2.64 0.38 0.19 0.00 Calculated 47 E8.1-Pipe Pipe E9.1-Structure E9-Structure 25.28 19.10 18.59 2.0000 8.000 0.0120 0.4 1.9 0.22 4.26 0.21 0.32 0.00 Calculated 48 E8-Pipe Pipe E8-Structure E9-Structure 61.63 12.93 12.62 0.5000 24.000 0.0150 1.2 13.8 0.08 2.66 0.39 0.20 0.00 Calculated 49 E9.1-Pipe Pipe E10.1-Structure E10-Structure 30.97 19.10 18.44 2.1200 8.000 0.0120 0.4 1.9 0.18 4.15 0.19 0.29 0.00 Calculated 50 E9-Pipe Pipe E9-Structure E10-Structure 66.95 12.62 12.29 0.5000 24.000 0.0150 1.6 13.8 0.12 2.92 0.46 0.23 0.00 Calculated 51 Link-01 Pipe Out-1E16-Pipe Detention-Basin 178.44 10.50 0.00 5.8800 12.000 0.0150 3.1 0.0 0.12 0.00 0.46 0.23 0.00 Calculated 52 Link-02 Pipe D3-Structure Detention-Basin 117.22 9.00 0.00 7.6800 12.000 0.0150 0.4 0.0 0.12 0.00 0.46 0.23 0.00 Calculated 53 Link-03 Pipe Out-1C2-Pipe Detention-Basin 30.02 10.50 0.00 34.9800 12.000 0.0150 0.5 0.0 0.12 0.00 0.46 0.23 0.00 Calculated 54 Link-04 Pipe Out-1B1-Pipe Detention-Basin 60.81 10.50 0.00 17.2700 12.000 0.0150 0.3 0.0 0.12 0.00 0.46 0.23 0.00 Calculated 55 Link-05 Pipe Out-1A15-Pipe Detention-Basin 138.79 10.50 0.00 7.5700 12.000 0.0150 8.8 0.0 0.12 0.00 0.46 0.23 0.00 Calculated 56 Link-11 Pipe Jun-02 Jun-03 71.00 32.00 30.00 2.8200 18.000 0.0150 3.2 15.3 0.21 6.81 0.46 0.31 0.00 Calculated 57 Link-12 Pipe Jun-03 Jun-04 417.20 0.00 0.00 0.0000 12.000 0.0150 3.2 0.0 0.21 0.00 0.46 0.31 0.00 Calculated 58 Link-14 Pipe Jun-05 Jun-06 128.08 0.00 0.00 0.0000 12.000 0.0150 3.6 0.0 0.21 0.00 0.46 0.31 0.00 Calculated 10 Year Storm Analysis
Post-Development
User: RRG Page 4 of 50 2505
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Link Summary
SN Element Element From To (Outlet) Length Inlet Outlet Average Diameter or Manning's Peak Design Flow Peak Flow/ Peak Flow Peak Flow Peak Flow Total Time Reported ID Type (Inlet) Node Invert Invert Slope Height Roughness Flow Capacity Design Flow Velocity Depth Depth/ Surcharged Condition Node Elevation Elevation Ratio Total Depth
Ratio
(ft) (ft) (ft) (%) (in) (cfs) (cfs) (ft/sec) (ft) (min) 59 Link-16 Pipe Jun-07 Out-02 317.29 0.00 0.00 0.0000 12.000 0.0150 3.8 0.0 0.21 0.00 0.46 0.31 0.00 Calculated 60 Link-17 Pipe Out-1D4-Pipe Out-02 137.86 10.50 0.00 7.6200 0.000 0.0150 2.7 0.0 0.21 0.00 0.46 0.31 0.00 Calculated 61 Link-18 Pipe Out-1Pipe (62) Out-02 99.47 10.50 0.00 10.5600 0.000 0.0150 2.7 0.0 0.21 0.00 0.46 0.31 0.00 Calculated 62 Link-19 Pipe Out-1Pipe (59) Out-02 130.31 10.50 0.00 8.0600 12.000 0.0150 2.7 0.0 0.21 0.00 0.46 0.31 0.00 Calculated 63 Link-20 Pipe Out-1Pipe (53) Out-02 191.76 10.50 0.00 5.4800 12.000 0.0150 2.7 0.0 0.21 0.00 0.46 0.31 0.00 Calculated 64 Link-29 Pipe Jun-04 Jun-08 48.58 19.20 18.82 0.7800 0.000 0.0150 3.6 0.0 0.21 0.00 0.46 0.31 0.00 Calculated 65 Link-30 Pipe Jun-08 Jun-05 67.00 19.20 18.20 1.4900 18.000 0.0150 3.6 11.1 0.32 5.60 0.58 0.39 0.00 Calculated 66 Link-31 Pipe Jun-06 Jun-09 46.31 14.60 14.60 0.0000 0.000 0.0150 3.7 0.0 0.32 0.00 0.58 0.39 0.00 Calculated 67 Link-32 Pipe Jun-09 Jun-07 64.00 14.60 13.20 2.1900 18.000 0.0150 3.7 13.5 0.27 6.48 0.53 0.36 0.00 Calculated 68 Pipe (24) Pipe Structure - 38 Structure - 39 45.94 28.60 28.22 0.8300 18.000 0.0150 2.4 8.3 0.29 4.06 0.55 0.37 0.00 Calculated 69 Pipe (34) Pipe Structure - 48 Structure - 49 46.55 26.48 25.79 1.4800 18.000 0.0120 2.8 13.9 0.20 6.16 0.46 0.31 0.00 Calculated 70 Pipe (53) Pipe Structure - 75 Out-1Pipe (53) 27.49 10.63 10.50 0.4700 18.000 0.0120 2.7 7.8 0.34 4.00 0.60 0.40 0.00 Calculated 71 Pipe (59) Pipe Structure - 83 Out-1Pipe (59) 25.67 10.63 10.50 0.5100 18.000 0.0150 2.7 6.5 0.41 3.48 0.67 0.45 0.00 Calculated 72 Pipe (62) Pipe Structure - 87 Out-1Pipe (62) 25.95 10.63 10.50 0.5000 18.000 0.0150 2.7 6.4 0.41 3.47 0.67 0.45 0.00 Calculated 73 Orifice-01 Orifice Detention-Basin Structure - 83 10.50 10.63 9.000 2.7 74 Orifice-02 Orifice Detention-Basin D4-Structure 10.50 10.63 9.000 2.7 75 Orifice-03 Orifice Detention-Basin Structure - 87 10.50 10.63 9.000 2.7 76 Orifice-04 Orifice Detention-Basin Structure - 75 10.50 10.63 9.000 2.7 10 Year Storm Analysis
Post-Development
User: RRG Page 5 of 50 2506
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin Hydrology
Subbasin : A01
Input Data
Area (ac) ........................................................................ 5.17 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 81.40 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved roads with curbs & sewers 0.37 D 98.00
Woods & grass combination, Fair 1.10 C 76.00
Woods & grass combination, Fair 0.40 C 76.00
Woods & grass combination, Fair 3.30 D 82.00
Composite Area & Weighted CN 5.17 81.40
Time of Concentration
TOC Method : SCS TR-55
Sheet Flow Equation :

Tc = (0.007 * ((n * Lf)^0.8)) / ((P^0.5) * (Sf^0.4))
Where :

Tc = Time of Concentration (hr)
n = Manning's roughness
Lf = Flow Length (ft)
P = 2 yr, 24 hr Rainfall (inches)
Sf = Slope (ft/ft)
Shallow Concentrated Flow Equation :

V = 16.1345 * (Sf^0.5) (unpaved surface)
V = 20.3282 * (Sf^0.5) (paved surface)
V = 15.0 * (Sf^0.5) (grassed waterway surface)
V = 10.0 * (Sf^0.5) (nearly bare & untilled surface)
V = 9.0 * (Sf^0.5) (cultivated straight rows surface)
V = 7.0 * (Sf^0.5) (short grass pasture surface)
V = 5.0 * (Sf^0.5) (woodland surface)
V = 2.5 * (Sf^0.5) (forest w/heavy litter surface)
Tc = (Lf / V) / (3600 sec/hr)
Where:

Tc = Time of Concentration (hr)
Lf = Flow Length (ft)
V = Velocity (ft/sec)
Sf = Slope (ft/ft)
Channel Flow Equation :

V = (1.49 * (R^(2/3)) * (Sf^0.5)) / n
R = Aq / Wp
Tc = (Lf / V) / (3600 sec/hr)
Where :

Tc = Time of Concentration (hr)
Lf = Flow Length (ft)
R = Hydraulic Radius (ft)
Aq = Flow Area (ft²)
Wp = Wetted Perimeter (ft)
V = Velocity (ft/sec)
Sf = Slope (ft/ft)
n = Manning's roughness
10 Year Storm Analysis
Post-Development
User: RRG Page 6 of 50 2507
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subarea Subarea Subarea
Sheet Flow Computations A B C
Manning's Roughness : 0.4 0.00 0.00
Flow Length (ft) : 100 0.00 0.00
Slope (%) : 8.9 0.00 0.00
2 yr, 24 hr Rainfall (in) : 3.74 0.00 0.00
Velocity (ft/sec) : 0.15 0.00 0.00
Computed Flow Time (min) : 10.93 0.00 0.00
Subarea Subarea Subarea
Shallow Concentrated Flow Computations A B C
Flow Length (ft) : 933 0.00 0.00
Slope (%) : 4.8 0.00 0.00
Surface Type : Unpaved Unpaved Unpaved
Velocity (ft/sec) : 3.53 0.00 0.00
Computed Flow Time (min) : 4.41 0.00 0.00
Subarea Subarea Subarea
Channel Flow Computations A B C
Manning's Roughness : 0.012 0.00 0.00
Flow Length (ft) : 71 0.00 0.00
Channel Slope (%) : 1 0.00 0.00
Cross Section Area (ft²) : 7 0.00 0.00
Wetted Perimeter (ft) : 9.8 0.00 0.00
Velocity (ft/sec) : 9.92 0.00 0.00
Computed Flow Time (min) : 0.12 0.00 0.00
Total TOC (min) ..................15.46
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 2.56 Peak Runoff (cfs) ........................................................... 3.15 Weighted Curve Number ............................................... 81.40 Time of Concentration (days hh:mm:ss) ........................ 0 00:15:28 10 Year Storm Analysis
Post-Development
User: RRG Page 7 of 50 2508
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : A02
Input Data
Area (ac) ........................................................................ 4.02 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 81.08 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved roads with curbs & sewers 0.22 D 98.00
Woods & grass combination, Fair 1.00 C 76.00
Woods & grass combination, Fair 0.20 C 76.00
Woods & grass combination, Fair 2.60 D 82.00
Composite Area & Weighted CN 4.02 81.08
Time of Concentration
Subarea Subarea Subarea
Sheet Flow Computations A B C
Manning's Roughness : 0.4 0.00 0.00
Flow Length (ft) : 100 0.00 0.00
Slope (%) : 8 0.00 0.00
2 yr, 24 hr Rainfall (in) : 3.74 0.00 0.00
Velocity (ft/sec) : 0.15 0.00 0.00
Computed Flow Time (min) : 11.41 0.00 0.00
Subarea Subarea Subarea
Shallow Concentrated Flow Computations A B C
Flow Length (ft) : 925 0.00 0.00
Slope (%) : 4 0.00 0.00
Surface Type : Unpaved Unpaved Unpaved
Velocity (ft/sec) : 3.23 0.00 0.00
Computed Flow Time (min) : 4.77 0.00 0.00
Subarea Subarea Subarea
Channel Flow Computations A B C
Manning's Roughness : 0.012 0.00 0.00
Flow Length (ft) : 79 0.00 0.00
Channel Slope (%) : 1 0.00 0.00
Cross Section Area (ft²) : 7.7 0.00 0.00
Wetted Perimeter (ft) : 9.8 0.00 0.00
Velocity (ft/sec) : 10.57 0.00 0.00
Computed Flow Time (min) : 0.12 0.00 0.00
Total TOC (min) ..................16.31
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 2.53 Peak Runoff (cfs) ........................................................... 2.40 Weighted Curve Number ............................................... 81.08 Time of Concentration (days hh:mm:ss) ........................ 0 00:16:19 10 Year Storm Analysis
Post-Development
User: RRG Page 8 of 50 2509
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : A03
Input Data
Area (ac) ........................................................................ 4.49 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 82.72 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved roads with curbs & sewers 0.39 D 98.00
Woods & grass combination, Fair 0.50 C 76.00
Woods & grass combination, Fair 3.60 D 82.00
Composite Area & Weighted CN 4.49 82.72
Time of Concentration
Subarea Subarea Subarea
Sheet Flow Computations A B C
Manning's Roughness : 0.4 0.00 0.00
Flow Length (ft) : 100 0.00 0.00
Slope (%) : 7 0.00 0.00
2 yr, 24 hr Rainfall (in) : 2.85 0.00 0.00
Velocity (ft/sec) : 0.12 0.00 0.00
Computed Flow Time (min) : 13.79 0.00 0.00
Subarea Subarea Subarea
Shallow Concentrated Flow Computations A B C
Flow Length (ft) : 964 0.00 0.00
Slope (%) : 4 0.00 0.00
Surface Type : Unpaved Unpaved Unpaved
Velocity (ft/sec) : 3.23 0.00 0.00
Computed Flow Time (min) : 4.97 0.00 0.00
Subarea Subarea Subarea
Channel Flow Computations A B C
Manning's Roughness : 0.012 0.00 0.00
Flow Length (ft) : 75 0.00 0.00
Channel Slope (%) : 1 0.00 0.00
Cross Section Area (ft²) : 7.74 0.00 0.00
Wetted Perimeter (ft) : 9.8 0.00 0.00
Velocity (ft/sec) : 10.61 0.00 0.00
Computed Flow Time (min) : 0.12 0.00 0.00
Total TOC (min) ..................18.88
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 2.67 Peak Runoff (cfs) ........................................................... 2.84 Weighted Curve Number ............................................... 82.72 Time of Concentration (days hh:mm:ss) ........................ 0 00:18:53 10 Year Storm Analysis
Post-Development
User: RRG Page 9 of 50 2510
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B01
Input Data
Area (ac) ........................................................................ 0.22 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.22 D 98.00
Composite Area & Weighted CN 0.22 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.24 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 10 of 50 2511
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B02
Input Data
Area (ac) ........................................................................ 0.23 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.23 D 98.00
Composite Area & Weighted CN 0.23 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.25 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 11 of 50 2512
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B03
Input Data
Area (ac) ........................................................................ 0.33 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.33 D 98.00
Composite Area & Weighted CN 0.33 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.35 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 12 of 50 2513
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B04
Input Data
Area (ac) ........................................................................ 0.33 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.33 D 98.00
Composite Area & Weighted CN 0.33 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.35 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 13 of 50 2514
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B05
Input Data
Area (ac) ........................................................................ 0.36 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.36 D 98.00
Composite Area & Weighted CN 0.36 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.38 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 14 of 50 2515
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B06
Input Data
Area (ac) ........................................................................ 0.36 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.36 D 98.00
Composite Area & Weighted CN 0.36 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.39 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 15 of 50 2516
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B07
Input Data
Area (ac) ........................................................................ 0.46 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.46 D 98.00
Composite Area & Weighted CN 0.46 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.49 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 16 of 50 2517
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B08
Input Data
Area (ac) ........................................................................ 0.23 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.23 D 98.00
Composite Area & Weighted CN 0.23 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.25 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 17 of 50 2518
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B09
Input Data
Area (ac) ........................................................................ 0.22 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.22 D 98.00
Composite Area & Weighted CN 0.22 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.24 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 18 of 50 2519
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B10
Input Data
Area (ac) ........................................................................ 0.16 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.16 D 98.00
Composite Area & Weighted CN 0.16 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.17 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 19 of 50 2520
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B11
Input Data
Area (ac) ........................................................................ 0.25 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.25 D 98.00
Composite Area & Weighted CN 0.25 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.27 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 20 of 50 2521
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B12
Input Data
Area (ac) ........................................................................ 0.49 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.49 D 98.00
Composite Area & Weighted CN 0.49 98.00
Time of Concentration
User-Defined TOC override (minutes): 6.00
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.52 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 21 of 50 2522
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B13
Input Data
Area (ac) ........................................................................ 0.38 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.38 D 98.00
Composite Area & Weighted CN 0.38 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.41 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 22 of 50 2523
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B14
Input Data
Area (ac) ........................................................................ 0.32 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.32 D 98.00
Composite Area & Weighted CN 0.32 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.35 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 23 of 50 2524
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B15
Input Data
Area (ac) ........................................................................ 0.35 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.35 D 98.00
Composite Area & Weighted CN 0.35 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.38 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 24 of 50 2525
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B16
Input Data
Area (ac) ........................................................................ 0.17 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.17 D 98.00
Composite Area & Weighted CN 0.17 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.18 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 25 of 50 2526
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B17
Input Data
Area (ac) ........................................................................ 0.19 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.19 D 98.00
Composite Area & Weighted CN 0.19 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.20 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 26 of 50 2527
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B18
Input Data
Area (ac) ........................................................................ 0.11 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.11 D 98.00
Composite Area & Weighted CN 0.11 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.12 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 27 of 50 2528
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B19
Input Data
Area (ac) ........................................................................ 0.21 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.21 D 98.00
Composite Area & Weighted CN 0.21 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.23 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 28 of 50 2529
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B20
Input Data
Area (ac) ........................................................................ 0.24 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.24 D 98.00
Composite Area & Weighted CN 0.24 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.25 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 29 of 50 2530
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B21
Input Data
Area (ac) ........................................................................ 0.26 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.26 D 98.00
Composite Area & Weighted CN 0.26 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.28 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 30 of 50 2531
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B22
Input Data
Area (ac) ........................................................................ 0.27 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.27 D 98.00
Composite Area & Weighted CN 0.27 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.29 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 31 of 50 2532
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B23
Input Data
Area (ac) ........................................................................ 0.23 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.23 D 98.00
Composite Area & Weighted CN 0.23 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.25 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 32 of 50 2533
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B24
Input Data
Area (ac) ........................................................................ 0.14 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.14 D 98.00
Composite Area & Weighted CN 0.14 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.14 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 33 of 50 2534
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B25
Input Data
Area (ac) ........................................................................ 0.16 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.16 D 98.00
Composite Area & Weighted CN 0.16 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.17 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 34 of 50 2535
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B26
Input Data
Area (ac) ........................................................................ 0.08 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.08 D 98.00
Composite Area & Weighted CN 0.08 98.00
Time of Concentration
User-Defined TOC override (minutes): 6.00
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.09 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 35 of 50 2536
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B27
Input Data
Area (ac) ........................................................................ 0.04 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.04 D 98.00
Composite Area & Weighted CN 0.04 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.04 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 36 of 50 2537
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B28
Input Data
Area (ac) ........................................................................ 0.08 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.08 D 98.00
Composite Area & Weighted CN 0.08 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.09 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 37 of 50 2538
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B29
Input Data
Area (ac) ........................................................................ 0.06 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.06 D 98.00
Composite Area & Weighted CN 0.06 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.06 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 38 of 50 2539
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B30
Input Data
Area (ac) ........................................................................ 0.04 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.04 D 98.00
Composite Area & Weighted CN 0.04 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.04 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 39 of 50 2540
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B31
Input Data
Area (ac) ........................................................................ 0.04 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.04 D 98.00
Composite Area & Weighted CN 0.04 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.04 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 40 of 50 2541
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B32
Input Data
Area (ac) ........................................................................ 0.04 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.04 D 98.00
Composite Area & Weighted CN 0.04 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.04 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 41 of 50 2542
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B33
Input Data
Area (ac) ........................................................................ 0.09 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.09 D 98.00
Composite Area & Weighted CN 0.09 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 4.47 Total Runoff (in) ............................................................. 4.23 Peak Runoff (cfs) ........................................................... 0.10 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 10 Year Storm Analysis
Post-Development
User: RRG Page 42 of 50 2543
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B34
Input Data
Area (ac) ........................................................................ 0.10 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.10 D 98.00
Composite Area & Weighted CN 0.10 98.00
Time of Concentration
10 Year Storm Analysis
Post-Development
User: RRG Page 43 of 50 2544
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Junction Input
SN Element Invert Ground/Rim Ground/Rim Initial Initial Surcharge Surcharge Ponded ID Elevation (Max) (Max) Water Water Elevation Depth Area Elevation Offset Elevation Depth
(ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft²)
1 A1.1-Structure 19.10 21.00 1.90 19.10 0.00 21.00 0.00 0.00 2 A1-Structure 16.03 37.64 21.61 16.03 0.00 37.64 0.00 0.00 3 A2.1-Structure 19.10 21.00 1.90 19.10 0.00 21.00 0.00 0.00 4 A2-Structure 15.56 20.55 4.99 15.56 0.00 20.55 0.00 0.00 5 A3-Structure 15.13 19.11 3.98 15.13 0.00 19.11 0.00 0.00 6 A4-Structure 14.86 20.27 5.41 14.86 0.00 20.27 0.00 0.00 7 A5-Structure 13.86 20.07 6.21 13.86 0.00 20.07 0.00 0.00 8 B1-Structure 12.20 20.13 7.93 12.20 0.00 20.13 0.00 0.00 9 C1-Structure 19.10 21.00 1.90 19.10 0.00 21.00 0.00 0.00 10 C2-Structure 12.20 36.86 24.66 12.20 0.00 36.86 0.00 0.00 11 D1-Structure 19.10 21.00 1.90 19.10 0.00 21.00 0.00 0.00 12 D2-Structure 12.20 38.65 26.45 12.20 0.00 38.65 0.00 0.00 13 D3-Structure 10.50 16.50 6.00 10.50 0.00 13.25 -3.25 0.00 14 D4-Structure 10.63 13.10 2.47 10.63 0.00 14.00 0.90 0.00 15 E10.1-Structure 19.10 21.07 1.97 19.10 0.00 21.07 0.00 0.00 16 E10-Structure 12.29 20.26 7.97 12.29 0.00 20.26 0.00 0.00 17 E11-Structure 11.95 20.26 8.31 11.95 0.00 20.26 0.00 0.00 18 E13.1-Structure 19.10 21.07 1.97 19.10 0.00 21.07 0.00 0.00 19 E13-Structure 11.61 20.26 8.65 11.61 0.00 20.26 0.00 0.00 20 E14.2-Structure 19.10 21.07 1.97 19.10 0.00 21.07 0.00 0.00 21 E14-Structure 11.22 20.25 9.03 11.22 0.00 20.25 0.00 0.00 22 E15-Structure 10.79 20.25 9.46 10.79 0.00 20.25 0.00 0.00 23 E16-Structure 10.62 20.13 9.51 10.62 0.00 20.13 0.00 0.00 24 E1-Structure 15.10 19.22 4.12 15.10 0.00 19.22 0.00 0.00 25 E2-Structure 14.73 20.26 5.53 14.73 0.00 20.26 0.00 0.00 26 E4.1-Structure 19.10 21.08 1.98 19.10 0.00 21.08 0.00 0.00 27 E4-Structure 14.45 20.30 5.85 14.45 0.00 20.30 0.00 0.00 28 E5-Structure 14.37 20.09 5.72 14.37 0.00 20.09 0.00 0.00 29 E6-Structure 14.02 20.20 6.18 14.02 0.00 20.20 0.00 0.00 30 E7.1-Structure 19.10 21.07 1.97 19.10 0.00 21.07 0.00 0.00 31 E7-Structure 13.23 20.26 7.03 13.23 0.00 20.26 0.00 0.00 32 E8-Structure 12.93 20.26 7.33 12.93 0.00 20.26 0.00 0.00 33 E9.1-Structure 19.10 21.07 1.97 19.10 0.00 21.07 0.00 0.00 34 E9-Structure 12.62 20.26 7.64 12.62 0.00 20.26 0.00 0.00 35 Jun-01 0.00 10.50 10.50 0.00 0.00 0.00 -10.50 0.00
36 Jun-02 0.00 6.00 6.00 0.00 0.00 6.00 0.00 0.00
37 Jun-03 0.00 6.00 6.00 0.00 0.00 6.00 0.00 0.00
38 Jun-04 19.20 6.00 -13.20 0.00 -19.20 6.00 0.00 0.00
39 Jun-05 18.20 6.00 -12.20 0.00 -18.20 6.00 0.00 0.00
40 Jun-06 14.60 6.00 -8.60 0.00 -14.60 6.00 0.00 0.00
41 Jun-07 13.20 6.00 -7.20 0.00 -13.20 6.00 0.00 0.00
42 Jun-08 19.20 6.00 -13.20 0.00 -19.20 6.00 0.00 0.00
43 Jun-09 14.60 6.00 -8.60 0.00 -14.60 0.00 -6.00 0.00
44 Out-1A15-Pipe 10.50 16.50 6.00 10.50 0.00 16.50 0.00 0.00 45 Out-1B1-Pipe 10.50 16.50 6.00 10.50 0.00 16.50 0.00 0.00 46 Out-1C2-Pipe 10.50 16.50 6.00 10.50 0.00 16.50 0.00 0.00 47 Out-1D4-Pipe 10.50 16.50 6.00 10.50 0.00 16.50 0.00 0.00 48 Out-1E16-Pipe 10.50 16.50 6.00 10.50 0.00 0.00 -16.50 0.00 49 Out-1Pipe (53) 10.50 16.50 6.00 10.50 0.00 16.50 0.00 0.00 50 Out-1Pipe (59) 10.50 16.50 6.00 10.50 0.00 16.50 0.00 0.00 51 Out-1Pipe (62) 10.50 16.50 6.00 10.50 0.00 16.50 0.00 0.00 52 Structure - 100 19.10 19.83 0.73 19.10 0.00 19.83 0.00 0.00 53 Structure - 101 11.91 19.47 7.56 11.91 0.00 19.47 0.00 0.00 54 Structure - 102 19.10 19.83 0.73 19.10 0.00 19.83 0.00 0.00 55 Structure - 103 11.59 19.48 7.89 11.59 0.00 19.48 0.00 0.00 56 Structure - 104 19.10 19.83 0.73 19.10 0.00 19.83 0.00 0.00 57 Structure - 105 11.09 19.41 8.31 11.09 0.00 19.41 0.00 0.00 58 Structure - 35 10.76 18.50 7.74 10.76 0.00 18.50 0.00 0.00 59 Structure - 36 10.59 20.13 9.54 10.59 0.00 20.13 0.00 0.00 60 Structure - 38 28.60 31.31 2.71 28.60 0.00 31.31 0.00 0.00 61 Structure - 39 27.61 32.57 4.96 27.61 0.00 32.57 0.00 0.00 62 Structure - 48 26.48 1.78 -24.70 26.48 0.00 1.78 0.00 0.00 63 Structure - 49 25.31 29.72 4.41 25.31 0.00 29.72 0.00 0.00 64 Structure - 75 10.63 13.10 2.47 10.63 0.00 14.00 0.90 0.00 65 Structure - 83 10.63 13.10 2.47 10.63 0.00 14.00 0.90 0.00 66 Structure - 87 10.63 13.10 2.47 10.63 0.00 14.00 0.90 0.00 67 Structure - 91 19.10 21.10 2.00 19.10 0.00 21.10 0.00 0.00 68 Structure - 94 19.10 19.83 0.73 19.10 0.00 19.83 0.00 0.00 69 Structure - 95 13.30 19.40 6.10 13.30 0.00 19.40 0.00 0.00 70 Structure - 96 19.10 19.83 0.73 19.10 0.00 19.83 0.00 0.00 71 Structure - 97 12.86 19.42 6.56 12.86 0.00 19.42 0.00 0.00 72 Structure - 98 19.10 19.83 0.73 19.10 0.00 19.83 0.00 0.00 73 Structure - 99 12.39 19.44 7.04 12.39 0.00 19.44 0.00 0.00 10 Year Storm Analysis
Post-Development
User: RRG Page 44 of 50 2545
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Junction Results
SN Element Peak Peak Max HGL Max HGL Max Min Average HGL Average HGL Time of Time of Total Total Time ID Inflow Lateral Elevation Depth Surcharge Freeboard Elevation Depth Max HGL Peak Flooded Flooded Inflow Attained Attained Depth Attained Attained Attained Occurrence Flooding Volume Attained Occurrence
(cfs) (cfs) (ft) (ft) (ft) (ft) (ft) (ft) (days hh:mm) (days hh:mm) (ac-in) (min) 1 A1.1-Structure 0.2 0.2 19.24 0.14 0.00 1.77 19.15 0.05 0 07:50 0 00:00 0.00 0.00 2 A1-Structure 2.7 0.2 18.46 2.43 0.00 19.18 18.32 2.29 0 08:03 0 00:00 0.00 0.00 3 A2.1-Structure 0.2 0.2 19.26 0.16 0.00 1.74 19.16 0.06 0 07:50 0 00:00 0.00 0.00 4 A2-Structure 3.1 0.1 18.38 2.82 0.00 2.16 18.28 2.72 0 07:50 0 00:00 0.00 0.00 5 A3-Structure 3.3 0.3 15.87 0.74 0.00 3.25 15.40 0.27 0 08:02 0 00:00 0.00 0.00 6 A4-Structure 6.1 0.0 17.05 2.19 0.00 3.22 16.91 2.05 0 08:04 0 00:00 0.00 0.00 7 A5-Structure 6.5 0.1 18.47 4.61 0.00 1.60 18.37 4.51 0 07:51 0 00:00 0.00 0.00 8 B1-Structure 0.3 0.3 12.30 0.10 0.00 7.83 12.24 0.04 0 07:50 0 00:00 0.00 0.00 9 C1-Structure 0.2 0.2 19.26 0.16 0.00 1.74 19.16 0.06 0 07:50 0 00:00 0.00 0.00 10 C2-Structure 0.5 0.3 18.37 6.17 0.00 18.49 18.27 6.07 0 07:50 0 00:00 0.00 0.00 11 D1-Structure 0.2 0.2 19.25 0.15 0.00 1.76 19.16 0.06 0 07:49 0 00:00 0.00 0.00 12 D2-Structure 0.4 0.2 18.36 6.16 0.00 20.29 18.27 6.07 0 07:50 0 00:00 0.00 0.00 13 D3-Structure 0.4 0.0 10.62 0.12 0.00 5.88 10.55 0.05 0 07:50 0 00:00 0.00 0.00 14 D4-Structure 2.7 0.0 11.30 0.67 0.00 1.80 10.89 0.26 0 08:08 0 00:00 0.00 0.00 15 E10.1-Structure 0.4 0.4 19.29 0.19 0.00 1.78 19.18 0.08 0 07:49 0 00:00 0.00 0.00 16 E10-Structure 2.0 0.1 18.64 6.35 0.00 1.62 18.52 6.23 0 07:50 0 00:00 0.00 0.00 17 E11-Structure 2.1 0.1 12.48 0.53 0.00 7.78 12.16 0.21 0 07:52 0 00:00 0.00 0.00 18 E13.1-Structure 0.4 0.4 19.30 0.20 0.00 1.77 19.18 0.08 0 07:49 0 00:00 0.00 0.00 19 E13-Structure 2.6 0.0 18.72 7.11 0.00 1.54 18.60 6.99 0 07:50 0 00:00 0.00 0.00 20 E14.2-Structure 0.2 0.2 19.24 0.14 0.00 1.83 19.16 0.06 0 07:49 0 00:00 0.00 0.00 21 E14-Structure 2.8 0.1 18.60 7.38 0.00 1.65 18.52 7.30 0 07:49 0 00:00 0.00 0.00 22 E15-Structure 3.0 0.2 11.53 0.74 0.00 8.72 11.07 0.28 0 07:52 0 00:00 0.00 0.00 23 E16-Structure 3.1 0.1 11.36 0.74 0.00 8.77 10.90 0.28 0 07:53 0 00:00 0.00 0.00 24 E1-Structure 0.1 0.1 15.22 0.12 0.00 4.00 15.15 0.05 0 07:49 0 00:00 0.00 0.00 25 E2-Structure 0.1 0.0 14.88 0.15 0.00 5.38 14.79 0.06 0 07:52 0 00:00 0.00 0.00 26 E4.1-Structure 0.3 0.3 19.27 0.17 0.00 1.81 19.17 0.07 0 07:49 0 00:00 0.00 0.00 27 E4-Structure 0.1 0.0 14.60 0.15 0.00 5.70 14.51 0.06 0 07:52 0 00:00 0.00 0.00 28 E5-Structure 0.5 0.1 18.59 4.22 0.00 1.50 18.48 4.11 0 07:50 0 00:00 0.00 0.00 29 E6-Structure 0.6 0.1 14.32 0.30 0.00 5.88 14.14 0.12 0 07:52 0 00:00 0.00 0.00 30 E7.1-Structure 0.5 0.5 19.33 0.23 0.00 1.74 19.19 0.09 0 07:50 0 00:00 0.00 0.00 31 E7-Structure 1.1 0.0 18.68 5.45 0.00 1.58 18.53 5.30 0 07:50 0 00:00 0.00 0.00 32 E8-Structure 1.2 0.0 13.32 0.39 0.00 6.94 13.08 0.15 0 07:52 0 00:00 0.00 0.00 33 E9.1-Structure 0.4 0.4 19.31 0.21 0.00 1.76 19.18 0.08 0 07:50 0 00:00 0.00 0.00 34 E9-Structure 1.6 0.0 18.81 6.19 0.00 1.45 18.68 6.06 0 07:50 0 00:00 0.00 0.00 35 Jun-01 3.9 3.9 0.00 0.00 0.00 10.50 0.00 0.00 0 00:00 0 00:00 0.00 0.00 36 Jun-02 3.2 3.2 32.46 32.46 0.00 1.04 32.17 32.17 0 08:02 0 00:00 0.00 0.00 37 Jun-03 3.2 0.0 30.46 30.46 0.00 1.04 30.17 30.17 0 08:02 0 00:00 0.00 0.00 38 Jun-04 3.6 0.4 19.20 0.00 0.00 0.00 19.20 0.00 0 00:00 0 00:00 0.00 0.00 39 Jun-05 3.6 0.0 18.78 0.58 0.00 0.92 18.41 0.21 0 08:01 0 00:00 0.00 0.00 40 Jun-06 3.7 0.1 14.60 0.00 0.00 0.00 14.60 0.00 0 00:00 0 00:00 0.00 0.00 41 Jun-07 3.8 0.1 13.73 0.53 0.00 0.97 13.40 0.20 0 08:02 0 00:00 0.00 0.00 42 Jun-08 3.6 0.0 19.78 0.58 0.00 0.92 19.41 0.21 0 08:01 0 00:00 0.00 0.00 43 Jun-09 3.7 0.0 15.13 0.53 0.00 0.97 14.80 0.20 0 08:02 0 00:00 0.00 0.00 44 Out-1A15-Pipe 8.8 0.0 11.54 1.04 0.00 4.96 10.90 0.40 0 08:02 0 00:00 0.00 0.00 45 Out-1B1-Pipe 0.3 0.0 10.60 0.10 0.00 5.90 10.54 0.04 0 07:51 0 00:00 0.00 0.00 46 Out-1C2-Pipe 0.5 0.0 10.63 0.13 0.00 5.87 10.55 0.05 0 07:50 0 00:00 0.00 0.00 47 Out-1D4-Pipe 2.7 0.0 11.17 0.67 0.00 5.33 10.76 0.26 0 08:08 0 00:00 0.00 0.00 48 Out-1E16-Pipe 3.1 0.0 11.16 0.66 0.00 5.34 10.75 0.25 0 07:53 0 00:00 0.00 0.00 49 Out-1Pipe (53) 2.7 0.0 11.10 0.60 0.00 5.40 10.74 0.24 0 08:08 0 00:00 0.00 0.00 50 Out-1Pipe (59) 2.7 0.0 11.17 0.67 0.00 5.33 10.76 0.26 0 08:08 0 00:00 0.00 0.00 51 Out-1Pipe (62) 2.7 0.0 11.17 0.67 0.00 5.33 10.76 0.26 0 08:08 0 00:00 0.00 0.00 52 Structure - 100 0.4 0.4 19.30 0.20 0.00 0.53 19.18 0.08 0 07:50 0 00:00 0.00 0.00 53 Structure - 101 8.0 0.0 18.60 6.69 0.00 0.87 18.48 6.57 0 07:50 0 00:00 0.00 0.00 54 Structure - 102 0.4 0.4 19.30 0.20 0.00 0.53 19.18 0.08 0 07:50 0 00:00 0.00 0.00 55 Structure - 103 8.3 0.0 18.60 7.01 0.00 0.88 18.48 6.89 0 07:50 0 00:00 0.00 0.00 56 Structure - 104 0.3 0.3 19.28 0.18 0.00 0.54 19.17 0.07 0 07:50 0 00:00 0.00 0.00 57 Structure - 105 8.5 0.0 18.49 7.40 0.00 0.91 18.38 7.29 0 07:51 0 00:00 0.00 0.00 58 Structure - 35 8.5 0.0 11.79 1.03 0.00 6.72 11.16 0.40 0 08:02 0 00:00 0.00 0.00 59 Structure - 36 8.8 0.3 11.63 1.04 0.00 8.50 10.99 0.40 0 08:02 0 00:00 0.00 0.00 60 Structure - 38 2.4 2.4 29.15 0.55 0.00 2.16 28.80 0.20 0 08:03 0 00:00 0.00 0.00 61 Structure - 39 2.4 0.0 28.77 1.16 0.00 3.79 28.42 0.81 0 08:03 0 00:00 0.00 0.00 62 Structure - 48 2.8 2.8 26.94 0.46 0.00 1.04 26.65 0.17 0 08:04 0 00:00 0.00 0.00 63 Structure - 49 2.8 0.0 26.25 0.94 0.00 3.47 25.96 0.65 0 08:04 0 00:00 0.00 0.00 64 Structure - 75 2.7 0.0 11.23 0.60 0.00 1.87 10.87 0.24 0 08:08 0 00:00 0.00 0.00 65 Structure - 83 2.7 0.0 11.30 0.67 0.00 1.80 10.89 0.26 0 08:08 0 00:00 0.00 0.00 66 Structure - 87 2.7 0.0 11.30 0.67 0.00 1.80 10.89 0.26 0 08:08 0 00:00 0.00 0.00 67 Structure - 91 0.3 0.3 19.27 0.17 0.00 1.83 19.17 0.07 0 07:50 0 00:00 0.00 0.00 68 Structure - 94 0.5 0.5 19.36 0.26 0.00 0.46 19.20 0.10 0 07:50 0 00:00 0.00 0.00 69 Structure - 95 6.9 0.0 18.67 5.37 0.00 0.73 18.51 5.21 0 07:50 0 00:00 0.00 0.00 70 Structure - 96 0.4 0.4 19.33 0.23 0.00 0.49 19.19 0.09 0 07:50 0 00:00 0.00 0.00 71 Structure - 97 7.3 0.0 18.64 5.78 0.00 0.78 18.49 5.63 0 07:50 0 00:00 0.00 0.00 72 Structure - 98 0.4 0.4 19.33 0.23 0.00 0.50 19.19 0.09 0 07:50 0 00:00 0.00 0.00 73 Structure - 99 7.6 0.0 18.63 6.24 0.00 0.81 18.49 6.10 0 07:50 0 00:00 0.00 0.00 10 Year Storm Analysis
Post-Development
User: RRG Page 45 of 50 2546
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Pipe Input
SN Element Length Inlet Outlet Average Pipe Pipe Pipe Manning's Entrance Exit/Bend Additional Flap No. of ID Invert Invert Slope Shape Diameter or Width Roughness Losses Losses Losses Gate Barrels Elevation Elevation Height
(ft) (ft) (ft) (%) (in) (in)
1 A1.1-Pipe 43.57 19.10 18.23 2.0000 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 2 A10.1-Pipe 34.83 19.10 18.40 2.0000 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 3 A10-Pipe 91.67 12.39 11.91 0.5300 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 4 A11.1-Pipe 34.86 19.10 18.40 2.0000 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 5 A11-Pipe 67.33 11.91 11.59 0.4700 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 6 A12.1-Pipe 39.58 19.10 18.31 2.0000 CIRCULAR 8.040 8.040 0.0150 0.5000 0.5000 0.0000 No 1 7 A12-Pipe 100.61 11.59 11.09 0.4900 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 8 A13-Pipe 63.49 11.09 10.76 0.5200 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 9 A14-Pipe 37.44 10.76 10.59 0.4500 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 10 A15-Pipe 19.67 10.59 10.50 0.4600 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 11 A1-Pipe 32.78 27.61 18.23 28.6100 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 12 A2.1-Pipe 44.00 19.10 18.22 2.0000 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 13 A2-Pipe 97.50 16.03 15.56 0.4800 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 14 A3-Pipe 88.50 15.56 15.13 0.4900 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 15 A4.1-Pipe 39.16 25.31 16.82 21.6900 CIRCULAR 18.000 18.000 0.0120 0.5000 0.5000 0.0000 No 1 16 A4-Pipe 56.66 15.13 14.86 0.4800 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 17 A5-Pipe 107.77 14.86 13.86 0.9300 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 18 A6.1-Pipe 42.40 19.10 18.31 1.8700 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 19 A7.1-Pipe 34.69 19.10 18.41 2.0000 CIRCULAR 8.040 8.040 0.0150 0.5000 0.5000 0.0000 No 1 20 A7-Pipe 110.61 13.86 13.30 0.5100 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 21 A8.1-Pipe 34.74 19.10 18.41 2.0000 CIRCULAR 8.040 8.040 0.0150 0.5000 0.5000 0.0000 No 1 22 A8-Pipe 89.33 13.30 12.86 0.4900 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 23 A9.1-Pipe 34.78 19.10 18.40 2.0100 CIRCULAR 8.040 8.040 0.0150 0.5000 0.5000 0.0000 No 1 24 A9-Pipe 95.00 12.86 12.39 0.4900 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 25 B1-Pipe 19.69 12.20 10.50 8.6300 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 26 C1-Pipe 44.64 19.10 18.21 2.0000 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 27 C2-Pipe 19.67 12.20 10.50 8.6400 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 28 D1-Pipe 44.46 19.10 18.21 2.0000 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 29 D2-Pipe 19.67 12.20 10.50 8.6400 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 30 D4-Pipe 26.30 10.63 10.50 0.4900 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 31 E10-Pipe 68.72 12.29 11.95 0.5000 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 32 E11-Pipe 67.31 11.95 11.61 0.5000 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 33 E12.1-Pipe 28.75 19.10 18.52 2.0200 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 34 E13.1-Pipe 31.82 19.10 18.46 2.0000 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 35 E13-Pipe 77.56 11.61 11.22 0.5000 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 36 E14-Pipe 88.49 11.22 10.79 0.4900 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 37 E15-Pipe 61.58 10.79 10.62 0.2800 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 38 E16-Pipe 26.19 10.62 10.50 0.4600 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 39 E1-Pipe 73.22 15.10 14.73 0.5000 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 40 E2-Pipe 55.47 14.73 14.45 0.5000 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 41 E4-Pipe 15.97 14.45 14.37 0.5000 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 42 E5.1-Pipe 32.89 19.10 18.42 2.0800 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 43 E5-Pipe 70.61 14.37 14.02 0.5000 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 44 E6.1-Pipe 28.85 19.10 18.44 2.2800 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 45 E6-Pipe 58.54 14.02 13.73 0.5000 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 46 E7-Pipe 59.55 13.23 12.93 0.5000 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 47 E8.1-Pipe 25.28 19.10 18.59 2.0000 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 48 E8-Pipe 61.63 12.93 12.62 0.5000 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 49 E9.1-Pipe 30.97 19.10 18.44 2.1200 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 50 E9-Pipe 66.95 12.62 12.29 0.5000 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 51 Link-01 178.44 10.50 0.00 5.8800 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 52 Link-02 117.22 9.00 0.00 7.6800 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 53 Link-03 30.02 10.50 0.00 34.9800 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 54 Link-04 60.81 10.50 0.00 17.2700 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 55 Link-05 138.79 10.50 0.00 7.5700 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 56 Link-11 71.00 32.00 30.00 2.8200 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 57 Link-12 417.20 0.00 0.00 0.0000 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 58 Link-14 128.08 0.00 0.00 0.0000 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 59 Link-16 317.29 0.00 0.00 0.0000 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 60 Link-17 137.86 10.50 0.00 7.6200 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 61 Link-18 99.47 10.50 0.00 10.5600 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 62 Link-19 130.31 10.50 0.00 8.0600 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 63 Link-20 191.76 10.50 0.00 5.4800 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 64 Link-29 48.58 19.20 18.82 0.7800 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 65 Link-30 67.00 19.20 18.20 1.4900 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 66 Link-31 46.31 14.60 14.60 0.0000 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 67 Link-32 64.00 14.60 13.20 2.1900 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 68 Pipe (24) 45.94 28.60 28.22 0.8300 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 69 Pipe (34) 46.55 26.48 25.79 1.4800 CIRCULAR 18.000 18.000 0.0120 0.5000 0.5000 0.0000 No 1 70 Pipe (53) 27.49 10.63 10.50 0.4700 CIRCULAR 18.000 18.000 0.0120 0.5000 0.5000 0.0000 No 1 71 Pipe (59) 25.67 10.63 10.50 0.5100 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 72 Pipe (62) 25.95 10.63 10.50 0.5000 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 10 Year Storm Analysis
Post-Development
User: RRG Page 46 of 50 2547
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Pipe Results
SN Element Peak Time of Design Flow Peak Flow/ Peak Flow Travel Peak Flow Peak Flow Total Time Froude Reported ID Flow Peak Flow Capacity Design Flow Velocity Time Depth Depth/ Surcharged Number Condition Occurrence Ratio Total Depth
Ratio
(cfs) (days hh:mm) (cfs) (ft/sec) (min) (ft) (min)
1 A1.1-Pipe 0.2 0 07:51 1.9 0.09 3.32 0.22 0.14 0.21 0.00 Calculated 2 A10.1-Pipe 0.4 0 07:50 1.9 0.19 4.07 0.14 0.20 0.29 0.00 Calculated 3 A10-Pipe 7.6 0 08:02 25.9 0.29 4.59 0.33 0.93 0.37 0.00 Calculated 4 A11.1-Pipe 0.4 0 07:50 1.9 0.19 4.07 0.14 0.20 0.29 0.00 Calculated 5 A11-Pipe 8.0 0 08:02 24.5 0.32 4.45 0.25 0.98 0.39 0.00 Calculated 6 A12.1-Pipe 0.3 0 07:51 1.5 0.17 3.14 0.21 0.18 0.28 0.00 Calculated 7 A12-Pipe 8.3 0 08:02 25.0 0.33 4.56 0.37 0.99 0.40 0.00 Calculated 8 A13-Pipe 8.5 0 08:02 25.7 0.33 4.70 0.23 0.99 0.40 0.00 Calculated 9 A14-Pipe 8.5 0 08:02 24.0 0.35 4.46 0.14 1.03 0.41 0.00 Calculated 10 A15-Pipe 8.8 0 08:02 24.1 0.36 4.51 0.07 1.04 0.42 0.00 Calculated 11 A1-Pipe 2.4 0 08:03 48.7 0.05 14.33 0.04 0.23 0.15 0.00 Calculated 12 A2.1-Pipe 0.2 0 07:50 1.9 0.13 3.66 0.20 0.16 0.24 0.00 Calculated 13 A2-Pipe 2.7 0 08:02 6.3 0.43 3.44 0.47 0.69 0.46 0.00 Calculated 14 A3-Pipe 3.1 0 08:02 6.4 0.48 3.56 0.41 0.74 0.49 0.00 Calculated 15 A4.1-Pipe 2.8 0 08:04 53.0 0.05 15.95 0.04 0.24 0.16 0.00 Calculated 16 A4-Pipe 3.3 0 08:02 24.5 0.13 3.49 0.27 0.62 0.25 0.00 Calculated 17 A5-Pipe 6.1 0 08:02 34.3 0.18 5.27 0.34 0.72 0.29 0.00 Calculated 18 A6.1-Pipe 0.3 0 07:51 1.8 0.14 3.60 0.20 0.17 0.25 0.00 Calculated 19 A7.1-Pipe 0.5 0 07:50 1.5 0.33 3.81 0.15 0.26 0.40 0.00 Calculated 20 A7-Pipe 6.5 0 08:02 25.3 0.26 4.31 0.43 0.86 0.34 0.00 Calculated 21 A8.1-Pipe 0.4 0 07:50 1.5 0.26 3.58 0.16 0.23 0.35 0.00 Calculated 22 A8-Pipe 6.9 0 08:02 24.9 0.28 4.34 0.34 0.90 0.36 0.00 Calculated 23 A9.1-Pipe 0.4 0 07:50 1.5 0.26 3.57 0.16 0.23 0.35 0.00 Calculated 24 A9-Pipe 7.3 0 08:02 24.9 0.29 4.40 0.36 0.93 0.37 0.00 Calculated 25 B1-Pipe 0.3 0 07:51 57.6 0.00 4.67 0.07 0.10 0.05 0.00 Calculated 26 C1-Pipe 0.2 0 07:50 1.9 0.13 3.66 0.20 0.16 0.24 0.00 Calculated 27 C2-Pipe 0.5 0 07:50 57.6 0.01 5.59 0.06 0.13 0.07 0.00 Calculated 28 D1-Pipe 0.2 0 07:50 1.9 0.11 3.46 0.21 0.15 0.22 0.00 Calculated 29 D2-Pipe 0.4 0 07:50 57.6 0.01 5.37 0.06 0.12 0.06 0.00 Calculated 30 D4-Pipe 2.7 0 08:08 6.4 0.41 3.45 0.13 0.67 0.45 0.00 Calculated 31 E10-Pipe 2.0 0 07:52 13.9 0.15 3.16 0.36 0.52 0.26 0.00 Calculated 32 E11-Pipe 2.1 0 07:52 13.9 0.15 3.20 0.35 0.53 0.27 0.00 Calculated 33 E12.1-Pipe 0.4 0 07:50 1.9 0.20 4.17 0.11 0.20 0.30 0.00 Calculated 34 E13.1-Pipe 0.2 0 07:49 1.9 0.10 3.35 0.16 0.14 0.21 0.00 Calculated 35 E13-Pipe 2.6 0 07:52 13.9 0.18 3.36 0.38 0.58 0.29 0.00 Calculated 36 E14-Pipe 2.8 0 07:52 13.7 0.21 3.43 0.43 0.62 0.31 0.00 Calculated 37 E15-Pipe 3.0 0 07:53 10.3 0.29 2.85 0.36 0.74 0.37 0.00 Calculated 38 E16-Pipe 3.1 0 07:53 13.3 0.24 3.45 0.13 0.66 0.33 0.00 Calculated 39 E1-Pipe 0.1 0 07:52 6.4 0.01 1.29 0.95 0.12 0.08 0.00 Calculated 40 E2-Pipe 0.1 0 07:52 6.4 0.02 1.43 0.65 0.15 0.10 0.00 Calculated 41 E4-Pipe 0.1 0 07:53 6.3 0.02 1.41 0.19 0.15 0.10 0.00 Calculated 42 E5.1-Pipe 0.3 0 07:50 1.9 0.14 3.82 0.14 0.17 0.25 0.00 Calculated 43 E5-Pipe 0.5 0 07:52 6.4 0.08 2.14 0.55 0.28 0.19 0.00 Calculated 44 E6.1-Pipe 0.5 0 07:50 2.0 0.26 4.77 0.10 0.23 0.35 0.00 Calculated 45 E6-Pipe 0.6 0 07:52 6.4 0.08 2.22 0.44 0.30 0.20 0.00 Calculated 46 E7-Pipe 1.1 0 07:52 13.9 0.08 2.64 0.38 0.38 0.19 0.00 Calculated 47 E8.1-Pipe 0.4 0 07:50 1.9 0.22 4.26 0.10 0.21 0.32 0.00 Calculated 48 E8-Pipe 1.2 0 07:52 13.8 0.08 2.66 0.39 0.39 0.20 0.00 Calculated 49 E9.1-Pipe 0.4 0 07:50 1.9 0.18 4.15 0.12 0.19 0.29 0.00 Calculated 50 E9-Pipe 1.6 0 07:52 13.8 0.12 2.92 0.38 0.46 0.23 0.00 Calculated 51 Link-01 3.1 0 07:53 0.0 0.12 0.00 0.46 0.23 0.00 Calculated 52 Link-02 0.4 0 07:50 0.0 0.12 0.00 0.46 0.23 0.00 Calculated 53 Link-03 0.5 0 07:50 0.0 0.12 0.00 0.46 0.23 0.00 Calculated 54 Link-04 0.3 0 07:51 0.0 0.12 0.00 0.46 0.23 0.00 Calculated 55 Link-05 8.8 0 08:02 0.0 0.12 0.00 0.46 0.23 0.00 Calculated 56 Link-11 3.2 0 08:02 15.3 0.21 6.81 0.17 0.46 0.31 0.00 Calculated 57 Link-12 3.2 0 08:02 0.0 0.21 0.00 0.46 0.31 0.00 Calculated 58 Link-14 3.6 0 08:01 0.0 0.21 0.00 0.46 0.31 0.00 Calculated 59 Link-16 3.8 0 08:02 0.0 0.21 0.00 0.46 0.31 0.00 Calculated 60 Link-17 2.7 0 08:08 0.0 0.21 0.00 0.46 0.31 0.00 Calculated 61 Link-18 2.7 0 08:08 0.0 0.21 0.00 0.46 0.31 0.00 Calculated 62 Link-19 2.7 0 08:08 0.0 0.21 0.00 0.46 0.31 0.00 Calculated 63 Link-20 2.7 0 08:08 0.0 0.21 0.00 0.46 0.31 0.00 Calculated 64 Link-29 3.6 0 08:01 0.0 0.21 0.00 0.46 0.31 0.00 Calculated 65 Link-30 3.6 0 08:01 11.1 0.32 5.60 0.20 0.58 0.39 0.00 Calculated 66 Link-31 3.7 0 08:02 0.0 0.32 0.00 0.58 0.39 0.00 Calculated 67 Link-32 3.7 0 08:02 13.5 0.27 6.48 0.16 0.53 0.36 0.00 Calculated 68 Pipe (24) 2.4 0 08:03 8.3 0.29 4.06 0.19 0.55 0.37 0.00 Calculated 69 Pipe (34) 2.8 0 08:04 13.9 0.20 6.16 0.13 0.46 0.31 0.00 Calculated 70 Pipe (53) 2.7 0 08:08 7.8 0.34 4.00 0.11 0.60 0.40 0.00 Calculated 71 Pipe (59) 2.7 0 08:08 6.5 0.41 3.48 0.12 0.67 0.45 0.00 Calculated 72 Pipe (62) 2.7 0 08:08 6.4 0.41 3.47 0.12 0.67 0.45 0.00 Calculated 10 Year Storm Analysis
Post-Development
User: RRG Page 47 of 50 2548
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Storage Nodes
Storage Node : Detention-Basin
Input Data

10.50 15.50

5.00 0.00
-10.50
12634.80

0.00 Infiltration/Exfiltration

0.0900
Storage Area Volume Curves
Storage Curve : Storage-01
Stage Storage Storage
Area Volume
(ft) (ft²) (ft³)
0 11997.07 0.000

0.1 12209.57 1210.33

0.2 12422.63 2441.94

0.3 12636.25 3694.88

0.4 12850.44 4969.21

0.5 13065.18 6264.99

0.6 13280.49 7582.27

0.7 13496.37 8921.11

0.8 13712.80 10281.57

0.9 13929.80 11663.70
1 14147.36 13067.56

1.1 14365.48 14493.20

1.2 14584.17 15940.68

1.3 14803.41 17410.06

1.4 15023.22 18901.39

1.5 15243.59 20414.73

1.6 15464.53 21950.14

1.7 15686.02 23507.67

1.8 15908.08 25087.38

1.9 16130.71 26689.32
2 16353.89 28313.55

2.1 16577.64 29960.13

2.2 16801.95 31629.11

2.3 17026.82 33320.55

2.4 17252.25 35034.50

2.5 17478.25 36771.03

2.6 17704.81 38530.18

2.7 17931.93 40312.02

2.8 18159.61 42116.60

2.9 18387.86 43943.97
3 18616.66 45794.20

3.1 18846.04 47667.34

3.2 19075.97 49563.44

3.3 19306.46 51482.56

3.4 19537.52 53424.76

3.5 19769.14 55390.09

3.6 20001.33 57378.61

3.7 20234.07 59390.38

3.8 20467.38 61425.45

3.9 20701.25 63483.88
4 20935.68 65565.73

4.1 21170.68 67671.05

4.2 21406.24 69799.90

4.3 21642.36 71952.33

4.4 21879.04 74128.40

4.5 22116.28 76328.17

4.6 22354.09 78551.69

4.7 22592.46 80799.02

4.8 22831.39 83070.21

4.9 23070.89 85365.32
5 23310.95 87684.41
Evaporation Loss ..........................................................

Exfiltration Rate (in/hr) ..................................................

Invert Elevation (ft) ........................................................

Max (Rim) Elevation (ft) ................................................

Max (Rim) Offset (ft) .....................................................

Initial Water Elevation (ft) ..............................................

Initial Water Depth (ft) ...................................................

Ponded Area (ft²) .......................................................... 10 Year Storm Analysis
Post-Development
User: RRG Page 48 of 50 2549
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
10 Year Storm Analysis
Post-Development
User: RRG Page 49 of 50 2550
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Storage Node : Detention-Basin (continued)
Outflow Orifices
SN Element Orifice Orifice Flap Circular Rectangular Rectangular Orifice Orifice ID Type Shape Gate Orifice Orifice Orifice Invert Coefficient Diameter Height Width Elevation
(in) (in) (in) (ft)
1 Orifice-01 Side Rectangular No 9.00 12.00 11.00 0.63
2 Orifice-02 Side Rectangular No 9.00 12.00 11.00 0.63
3 Orifice-03 Side Rectangular No 9.00 12.00 11.00 0.63
4 Orifice-04 Side Rectangular No 9.00 12.00 11.00 0.63
Output Summary Results

12.87 0.00

10.61 1.88

11.87 1.37

11.21 0.71
0 08:08

2.374
0 0

0.00 Total Flooded Volume (ac-in) .......................................

Total Time Flooded (min) ..............................................

Total Retention Time (sec) ...........................................

Max HGL Elevation Attained (ft) ...................................

Max HGL Depth Attained (ft) .........................................

Average HGL Elevation Attained (ft) .............................

Average HGL Depth Attained (ft) ..................................

Time of Max HGL Occurrence (days hh:mm) ...............

Total Exfiltration Volume (1000-ft³) ...............................

Peak Inflow (cfs) ...........................................................

Peak Lateral Inflow (cfs) ...............................................

Peak Outflow (cfs) ........................................................

Peak Exfiltration Flow Rate (cfm) ................................. 10 Year Storm Analysis
Post-Development
User: RRG Page 50 of 50 2551
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Project Description
SDG 220 Post.SPF
Project Options
CFS
Elevation
SCS TR-55
SCS TR-55
Kinematic Wave
YES
YES
Analysis Options
Mar 13, 2023 00:00:00
Mar 14, 2023 00:00:00
Mar 13, 2023 00:00:00
0 days
0 01:00:00 days hh:mm:ss
0 00:05:00 days hh:mm:ss
0 00:00:30 days hh:mm:ss
30 seconds
Rainfall Details
SN Rain Gage Data Data Source Rainfall Rain State County Return Rainfall Rainfall ID Source ID Type Units Period Depth Distribution
(years) (inches)
1 Time Series TS- 100yr Cumulative inches None None 100 7.36 SCS Type IA 24-hr Runoff (Dry Weather) Time Step ................

Runoff (Wet Weather) Time Step ...............

Reporting Time Step ...................................

Routing Time Step ......................................

Enable Overflow Ponding at Nodes ............

Skip Steady State Analysis Time Periods ...

Start Analysis On ........................................

End Analysis On ..........................................

Start Reporting On ......................................

Antecedent Dry Days ..................................

File Name ....................................................

Flow Units ...................................................

Elevation Type ............................................

Hydrology Method .......................................

Time of Concentration (TOC) Method ........

Link Routing Method ................................... 100 Year Storm Analysis
Post-Development
User: RRG Page 1 of 50 2552
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin Summary
SN Subbasin Area Peak Rate Weighted Total Total Total Peak Time of ID Factor Curve Rainfall Runoff Runoff Runoff Concentration Number Volume
(ac) (in) (in) (ac-in) (cfs) (days hh:mm:ss)
1 A01 5.17 484.00 81 7.36 5.19 26.80 6.7 0 00:15:27
2 A02 4.02 484.00 81 7.36 5.15 20.70 5.2 0 00:16:18
3 A03 4.49 484.00 83 7.36 5.34 23.96 5.9 0 00:18:52
4 B01 0.22 484.00 98 7.36 7.12 1.57 0.4 0 00:06:00
5 B02 0.23 484.00 98 7.36 7.12 1.62 0.4 0 00:06:00
6 B03 0.33 484.00 98 7.36 7.12 2.34 0.6 0 00:06:00
7 B04 0.33 484.00 98 7.36 7.12 2.32 0.6 0 00:06:00
8 B05 0.36 484.00 98 7.36 7.12 2.55 0.6 0 00:06:00
9 B06 0.36 484.00 98 7.36 7.12 2.57 0.7 0 00:06:00
10 B07 0.46 484.00 98 7.36 7.12 3.28 0.8 0 00:06:00
11 B08 0.23 484.00 98 7.36 7.12 1.64 0.4 0 00:06:00
12 B09 0.22 484.00 98 7.36 7.12 1.57 0.4 0 00:06:00
13 B10 0.16 484.00 98 7.36 7.12 1.14 0.3 0 00:06:00
14 B11 0.25 484.00 98 7.36 7.12 1.80 0.4 0 00:06:00
15 B12 0.49 484.00 98 7.36 7.12 3.47 0.9 0 00:06:00
16 B13 0.38 484.00 98 7.36 7.12 2.72 0.7 0 00:06:00
17 B14 0.32 484.00 98 7.36 7.12 2.30 0.6 0 00:06:00
18 B15 0.35 484.00 98 7.36 7.12 2.50 0.6 0 00:06:00
19 B16 0.17 484.00 98 7.36 7.12 1.19 0.3 0 00:06:00
20 B17 0.19 484.00 98 7.36 7.12 1.33 0.3 0 00:06:00
21 B18 0.11 484.00 98 7.36 7.12 0.77 0.2 0 00:06:00
22 B19 0.21 484.00 98 7.36 7.12 1.51 0.4 0 00:06:00
23 B20 0.24 484.00 98 7.36 7.12 1.68 0.4 0 00:06:00
24 B21 0.26 484.00 98 7.36 7.12 1.87 0.5 0 00:06:00
25 B22 0.27 484.00 98 7.36 7.12 1.93 0.5 0 00:06:00
26 B23 0.23 484.00 98 7.36 7.12 1.65 0.4 0 00:06:00
27 B24 0.14 484.00 98 7.36 7.12 0.97 0.2 0 00:06:00
28 B25 0.16 484.00 98 7.36 7.12 1.14 0.3 0 00:06:00
29 B26 0.08 484.00 98 7.36 7.12 0.57 0.2 0 00:06:00
30 B27 0.04 484.00 98 7.36 7.12 0.28 0.1 0 00:06:00
31 B28 0.08 484.00 98 7.36 7.12 0.57 0.2 0 00:06:00
32 B29 0.06 484.00 98 7.36 7.12 0.43 0.1 0 00:06:00
33 B30 0.04 484.00 98 7.36 7.12 0.28 0.1 0 00:06:00
34 B31 0.04 484.00 98 7.36 7.12 0.28 0.1 0 00:06:00
35 B32 0.04 484.00 98 7.36 7.12 0.28 0.1 0 00:06:00
36 B33 0.09 484.00 98 7.36 7.12 0.64 0.2 0 00:06:00
37 B34 0.10 484.00 98 7.36 7.12 0.70 0.2 0 00:06:00
38 B35 0.04 484.00 98 7.36 7.12 0.28 0.1 0 00:06:00
39 B36 0.09 484.00 98 7.36 7.12 0.65 0.2 0 00:06:00
40 B37 0.17 484.00 98 7.36 7.12 1.21 0.3 0 00:06:00
41 B38 0.13 484.00 98 7.36 7.12 0.91 0.2 0 00:06:00
42 C01 1.09 484.00 72 7.36 4.14 4.51 1.1 0 00:05:00
43 C02 0.28 484.00 72 7.36 4.14 1.16 0.3 0 00:29:07
44 C03 0.29 484.00 72 7.36 4.14 1.19 0.3 0 00:16:48
45 D01 0.48 484.00 98 7.36 7.12 3.45 0.9 0 00:06:00
46 D02 0.41 484.00 98 7.36 7.12 2.94 0.7 0 00:06:00
47 D03 0.65 484.00 98 7.36 7.12 4.62 1.1 0 00:06:00
48 D04 0.78 484.00 98 7.36 7.12 5.55 1.4 0 00:06:00
49 D05 0.44 484.00 98 7.36 7.12 3.14 0.8 0 00:06:00
50 D06 0.56 484.00 98 7.36 7.12 3.97 1.0 0 00:06:00
51 D07 0.29 484.00 98 7.36 7.12 2.06 0.5 0 00:06:00
100 Year Storm Analysis
Post-Development
User: RRG Page 2 of 50 2553
2554
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Link Summary
SN Element Element From To (Outlet) Length Inlet Outlet Average Diameter or Manning's Peak Design Flow Peak Flow/ Peak Flow Peak Flow Peak Flow Total Time Reported ID Type (Inlet) Node Invert Invert Slope Height Roughness Flow Capacity Design Flow Velocity Depth Depth/ Surcharged Condition Node Elevation Elevation Ratio Total Depth
Ratio
(ft) (ft) (ft) (%) (in) (cfs) (cfs) (ft/sec) (ft) (min) 1 A1.1-Pipe Pipe A1.1-Structure A1-Structure 43.57 19.10 18.23 2.0000 8.000 0.0120 0.3 1.9 0.15 3.84 0.18 0.26 0.00 Calculated 2 A10.1-Pipe Pipe Structure - 100 Structure - 101 34.83 19.10 18.40 2.0000 8.000 0.0120 0.6 1.9 0.31 4.68 0.26 0.38 0.00 Calculated 3 A10-Pipe Pipe Structure - 99 Structure - 101 91.67 12.39 11.91 0.5300 30.000 0.0150 15.1 25.9 0.58 5.47 1.37 0.55 0.00 Calculated 4 A11.1-Pipe Pipe Structure - 102 Structure - 103 34.86 19.10 18.40 2.0000 8.000 0.0120 0.6 1.9 0.31 4.68 0.26 0.38 0.00 Calculated 5 A11-Pipe Pipe Structure - 101 Structure - 103 67.33 11.91 11.59 0.4700 30.000 0.0150 15.7 24.5 0.64 5.28 1.45 0.58 0.00 Calculated 6 A12.1-Pipe Pipe Structure - 104 Structure - 105 39.58 19.10 18.31 2.0000 8.000 0.0150 0.4 1.5 0.27 3.62 0.24 0.36 0.00 Calculated 7 A12-Pipe Pipe Structure - 103 Structure - 105 100.61 11.59 11.09 0.4900 30.000 0.0150 16.2 25.0 0.65 5.41 1.47 0.59 0.00 Calculated 8 A13-Pipe Pipe Structure - 105 Structure - 35 63.49 11.09 10.76 0.5200 30.000 0.0150 16.6 25.7 0.64 5.57 1.46 0.58 0.00 Calculated 9 A14-Pipe Pipe Structure - 35 Structure - 36 37.44 10.76 10.59 0.4500 30.000 0.0150 16.6 24.0 0.69 5.26 1.53 0.61 0.00 Calculated 10 A15-Pipe Pipe Structure - 36 Out-1A15-Pipe 19.67 10.59 10.50 0.4600 30.000 0.0150 17.0 24.1 0.71 5.31 1.55 0.62 0.00 Calculated 11 A1-Pipe Pipe Structure - 39 A1-Structure 32.78 27.61 18.23 28.6100 18.000 0.0150 5.2 48.7 0.11 17.94 0.33 0.22 0.00 Calculated 12 A2.1-Pipe Pipe A2.1-Structure A2-Structure 44.00 19.10 18.22 2.0000 8.000 0.0120 0.4 1.9 0.21 4.22 0.21 0.31 0.00 Calculated 13 A2-Pipe Pipe A1-Structure A2-Structure 97.50 16.03 15.56 0.4800 18.000 0.0150 5.7 6.3 0.90 4.05 1.12 0.74 0.00 Calculated 14 A3-Pipe Pipe A2-Structure A3-Structure 88.50 15.56 15.13 0.4900 18.000 0.0150 6.3 6.4 0.99 4.10 1.22 0.81 0.00 Calculated 15 A4.1-Pipe Pipe Structure - 49 A4-Structure 39.16 25.31 16.82 21.6900 18.000 0.0120 5.9 53.0 0.11 19.80 0.34 0.23 0.00 Calculated 16 A4-Pipe Pipe A3-Structure A4-Structure 56.66 15.13 14.86 0.4800 30.000 0.0150 6.7 24.5 0.27 4.25 0.89 0.36 0.00 Calculated 17 A5-Pipe Pipe A4-Structure A5-Structure 107.77 14.86 13.86 0.9300 30.000 0.0150 12.6 34.3 0.37 6.44 1.05 0.42 0.00 Calculated 18 A6.1-Pipe Pipe Structure - 91 A5-Structure 42.40 19.10 18.31 1.8700 8.000 0.0120 0.4 1.8 0.23 4.15 0.22 0.32 0.00 Calculated 19 A7.1-Pipe Pipe Structure - 94 Structure - 95 34.69 19.10 18.41 2.0000 8.000 0.0150 0.8 1.5 0.55 4.34 0.35 0.53 0.00 Calculated 20 A7-Pipe Pipe A5-Structure Structure - 95 110.61 13.86 13.30 0.5100 30.000 0.0150 13.2 25.3 0.52 5.21 1.28 0.51 0.00 Calculated 21 A8.1-Pipe Pipe Structure - 96 Structure - 97 34.74 19.10 18.41 2.0000 8.000 0.0150 0.7 1.5 0.44 4.10 0.31 0.46 0.00 Calculated 22 A8-Pipe Pipe Structure - 95 Structure - 97 89.33 13.30 12.86 0.4900 30.000 0.0150 13.9 24.9 0.56 5.21 1.34 0.53 0.00 Calculated 23 A9.1-Pipe Pipe Structure - 98 Structure - 99 34.78 19.10 18.40 2.0100 8.000 0.0150 0.6 1.5 0.43 4.09 0.30 0.46 0.00 Calculated 24 A9-Pipe Pipe Structure - 97 Structure - 99 95.00 12.86 12.39 0.4900 30.000 0.0150 14.5 24.9 0.58 5.27 1.37 0.55 0.00 Calculated 25 B1-Pipe Pipe B1-Structure Out-1B1-Pipe 19.69 12.20 10.50 8.6300 24.000 0.0150 0.5 57.6 0.01 5.50 0.13 0.06 0.00 Calculated 26 C1-Pipe Pipe C1-Structure C2-Structure 44.64 19.10 18.21 2.0000 8.000 0.0120 0.4 1.9 0.21 4.22 0.21 0.31 0.00 Calculated 27 C2-Pipe Pipe C2-Structure Out-1C2-Pipe 19.67 12.20 10.50 8.6400 24.000 0.0150 0.8 57.6 0.01 6.54 0.17 0.08 0.00 Calculated 28 D1-Pipe Pipe D1-Structure D2-Structure 44.46 19.10 18.21 2.0000 8.000 0.0120 0.3 1.9 0.18 4.00 0.19 0.29 0.00 Calculated 29 D2-Pipe Pipe D2-Structure D3-Structure 19.67 12.20 10.50 8.6400 24.000 0.0150 0.7 57.6 0.01 6.25 0.15 0.08 0.00 Calculated 30 D4-Pipe Pipe D4-Structure Out-1D4-Pipe 26.30 10.63 10.50 0.4900 18.000 0.0150 4.3 6.4 0.67 3.88 0.90 0.60 0.00 Calculated 31 E10-Pipe Pipe E10-Structure E11-Structure 68.72 12.29 11.95 0.5000 24.000 0.0150 3.4 13.9 0.24 3.64 0.67 0.34 0.00 Calculated 32 E11-Pipe Pipe E11-Structure E13-Structure 67.31 11.95 11.61 0.5000 24.000 0.0150 3.6 13.9 0.26 3.69 0.69 0.35 0.00 Calculated 33 E12.1-Pipe Pipe E13.1-Structure E13-Structure 28.75 19.10 18.52 2.0200 8.000 0.0120 0.6 1.9 0.33 4.79 0.27 0.40 0.00 Calculated 34 E13.1-Pipe Pipe E14.2-Structure E14-Structure 31.82 19.10 18.46 2.0000 8.000 0.0120 0.3 1.9 0.16 3.88 0.18 0.27 0.00 Calculated 35 E13-Pipe Pipe E13-Structure E14-Structure 77.56 11.61 11.22 0.5000 24.000 0.0150 4.2 13.9 0.31 3.88 0.76 0.38 0.00 Calculated 36 E14-Pipe Pipe E14-Structure E15-Structure 88.49 11.22 10.79 0.4900 24.000 0.0150 4.7 13.7 0.34 3.94 0.81 0.40 0.00 Calculated 37 E15-Pipe Pipe E15-Structure E16-Structure 61.58 10.79 10.62 0.2800 24.000 0.0150 5.0 10.3 0.49 3.25 0.98 0.49 0.00 Calculated 38 E16-Pipe Pipe E16-Structure Out-1E16-Pipe 26.19 10.62 10.50 0.4600 24.000 0.0150 5.2 13.3 0.39 3.96 0.87 0.43 0.00 Calculated 39 E1-Pipe Pipe E1-Structure E2-Structure 73.22 15.10 14.73 0.5000 18.000 0.0150 0.2 6.4 0.02 1.46 0.16 0.11 0.00 Calculated 40 E2-Pipe Pipe E2-Structure E4-Structure 55.47 14.73 14.45 0.5000 18.000 0.0150 0.2 6.4 0.03 1.69 0.19 0.12 0.00 Calculated 41 E4-Pipe Pipe E4-Structure E5-Structure 15.97 14.45 14.37 0.5000 18.000 0.0150 0.2 6.3 0.03 1.67 0.19 0.13 0.00 Calculated 42 E5.1-Pipe Pipe E4.1-Structure E5-Structure 32.89 19.10 18.42 2.0800 8.000 0.0120 0.4 1.9 0.23 4.41 0.22 0.33 0.00 Calculated 43 E5-Pipe Pipe E5-Structure E6-Structure 70.61 14.37 14.02 0.5000 18.000 0.0150 0.8 6.4 0.13 2.48 0.36 0.24 0.00 Calculated 44 E6.1-Pipe Pipe E7.1-Structure E7-Structure 28.85 19.10 18.44 2.2800 8.000 0.0120 0.9 2.0 0.44 5.46 0.31 0.46 0.00 Calculated 45 E6-Pipe Pipe E6-Structure E7-Structure 58.54 14.02 13.73 0.5000 18.000 0.0150 0.9 6.4 0.14 2.57 0.38 0.25 0.00 Calculated 46 E7-Pipe Pipe E7-Structure E8-Structure 59.55 13.23 12.93 0.5000 24.000 0.0150 1.8 13.9 0.13 3.06 0.49 0.25 0.00 Calculated 47 E8.1-Pipe Pipe E9.1-Structure E9-Structure 25.28 19.10 18.59 2.0000 8.000 0.0120 0.7 1.9 0.37 4.89 0.28 0.42 0.00 Calculated 48 E8-Pipe Pipe E8-Structure E9-Structure 61.63 12.93 12.62 0.5000 24.000 0.0150 1.9 13.8 0.14 3.08 0.50 0.25 0.00 Calculated 49 E9.1-Pipe Pipe E10.1-Structure E10-Structure 30.97 19.10 18.44 2.1200 8.000 0.0120 0.6 1.9 0.30 4.78 0.25 0.38 0.00 Calculated 50 E9-Pipe Pipe E9-Structure E10-Structure 66.95 12.62 12.29 0.5000 24.000 0.0150 2.7 13.8 0.19 3.39 0.59 0.30 0.00 Calculated 51 Link-01 Pipe Out-1E16-Pipe Detention-Basin 178.44 10.50 0.00 5.8800 12.000 0.0150 5.2 0.0 0.19 0.00 0.59 0.30 0.00 Calculated 52 Link-02 Pipe D3-Structure Detention-Basin 117.22 9.00 0.00 7.6800 12.000 0.0150 0.7 0.0 0.19 0.00 0.59 0.30 0.00 Calculated 53 Link-03 Pipe Out-1C2-Pipe Detention-Basin 30.02 10.50 0.00 34.9800 12.000 0.0150 0.8 0.0 0.19 0.00 0.59 0.30 0.00 Calculated 54 Link-04 Pipe Out-1B1-Pipe Detention-Basin 60.81 10.50 0.00 17.2700 12.000 0.0150 0.5 0.0 0.19 0.00 0.59 0.30 0.00 Calculated 55 Link-05 Pipe Out-1A15-Pipe Detention-Basin 138.79 10.50 0.00 7.5700 12.000 0.0150 17.0 0.0 0.19 0.00 0.59 0.30 0.00 Calculated 56 Link-11 Pipe Jun-02 Jun-03 71.00 32.00 30.00 2.8200 18.000 0.0150 6.7 15.3 0.44 8.37 0.70 0.47 0.00 Calculated 57 Link-12 Pipe Jun-03 Jun-04 417.20 0.00 0.00 0.0000 12.000 0.0150 6.7 0.0 0.44 0.00 0.70 0.47 0.00 Calculated 58 Link-14 Pipe Jun-05 Jun-06 128.08 0.00 0.00 0.0000 12.000 0.0150 7.8 0.0 0.44 0.00 0.70 0.47 0.00 Calculated 100 Year Storm Analysis
Post-Development
User: RRG Page 4 of 50 2555
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Link Summary
SN Element Element From To (Outlet) Length Inlet Outlet Average Diameter or Manning's Peak Design Flow Peak Flow/ Peak Flow Peak Flow Peak Flow Total Time Reported ID Type (Inlet) Node Invert Invert Slope Height Roughness Flow Capacity Design Flow Velocity Depth Depth/ Surcharged Condition Node Elevation Elevation Ratio Total Depth
Ratio
(ft) (ft) (ft) (%) (in) (cfs) (cfs) (ft/sec) (ft) (min) 59 Link-16 Pipe Jun-07 Out-02 317.29 0.00 0.00 0.0000 12.000 0.0150 8.3 0.0 0.44 0.00 0.70 0.47 0.00 Calculated 60 Link-17 Pipe Out-1D4-Pipe Out-02 137.86 10.50 0.00 7.6200 0.000 0.0150 4.3 0.0 0.44 0.00 0.70 0.47 0.00 Calculated 61 Link-18 Pipe Out-1Pipe (62) Out-02 99.47 10.50 0.00 10.5600 0.000 0.0150 4.3 0.0 0.44 0.00 0.70 0.47 0.00 Calculated 62 Link-19 Pipe Out-1Pipe (59) Out-02 130.31 10.50 0.00 8.0600 12.000 0.0150 4.3 0.0 0.44 0.00 0.70 0.47 0.00 Calculated 63 Link-20 Pipe Out-1Pipe (53) Out-02 191.76 10.50 0.00 5.4800 12.000 0.0150 4.3 0.0 0.44 0.00 0.70 0.47 0.00 Calculated 64 Link-29 Pipe Jun-04 Jun-08 48.58 19.20 18.82 0.7800 0.000 0.0150 7.8 0.0 0.44 0.00 0.70 0.47 0.00 Calculated 65 Link-30 Pipe Jun-08 Jun-05 67.00 19.20 18.20 1.4900 18.000 0.0150 7.8 11.1 0.70 6.81 0.93 0.62 0.00 Calculated 66 Link-31 Pipe Jun-06 Jun-09 46.31 14.60 14.60 0.0000 0.000 0.0150 8.1 0.0 0.70 0.00 0.93 0.62 0.00 Calculated 67 Link-32 Pipe Jun-09 Jun-07 64.00 14.60 13.20 2.1900 18.000 0.0150 8.1 13.5 0.60 7.95 0.84 0.56 0.00 Calculated 68 Pipe (24) Pipe Structure - 38 Structure - 39 45.94 28.60 28.22 0.8300 18.000 0.0150 5.2 8.3 0.62 4.94 0.86 0.57 0.00 Calculated 69 Pipe (34) Pipe Structure - 48 Structure - 49 46.55 26.48 25.79 1.4800 18.000 0.0120 5.9 13.9 0.43 7.54 0.69 0.46 0.00 Calculated 70 Pipe (53) Pipe Structure - 75 Out-1Pipe (53) 27.49 10.63 10.50 0.4700 18.000 0.0120 4.3 7.8 0.55 4.52 0.79 0.53 0.00 Calculated 71 Pipe (59) Pipe Structure - 83 Out-1Pipe (59) 25.67 10.63 10.50 0.5100 18.000 0.0150 4.3 6.5 0.66 3.91 0.89 0.59 0.00 Calculated 72 Pipe (62) Pipe Structure - 87 Out-1Pipe (62) 25.95 10.63 10.50 0.5000 18.000 0.0150 4.3 6.4 0.66 3.90 0.89 0.59 0.00 Calculated 73 Orifice-01 Orifice Detention-Basin Structure - 83 10.50 10.63 9.000 4.3 74 Orifice-02 Orifice Detention-Basin D4-Structure 10.50 10.63 9.000 4.3 75 Orifice-03 Orifice Detention-Basin Structure - 87 10.50 10.63 9.000 4.3 76 Orifice-04 Orifice Detention-Basin Structure - 75 10.50 10.63 9.000 4.3 100 Year Storm Analysis
Post-Development
User: RRG Page 5 of 50 2556
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin Hydrology
Subbasin : A01
Input Data
Area (ac) ........................................................................ 5.17 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 81.40 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved roads with curbs & sewers 0.37 D 98.00
Woods & grass combination, Fair 1.10 C 76.00
Woods & grass combination, Fair 0.40 C 76.00
Woods & grass combination, Fair 3.30 D 82.00
Composite Area & Weighted CN 5.17 81.40
Time of Concentration
TOC Method : SCS TR-55
Sheet Flow Equation :

Tc = (0.007 * ((n * Lf)^0.8)) / ((P^0.5) * (Sf^0.4))
Where :

Tc = Time of Concentration (hr)
n = Manning's roughness
Lf = Flow Length (ft)
P = 2 yr, 24 hr Rainfall (inches)
Sf = Slope (ft/ft)
Shallow Concentrated Flow Equation :

Tc = Time of Concentration (hr)
Lf = Flow Length (ft)
V = Velocity (ft/sec)
Sf = Slope (ft/ft)
Channel Flow Equation :

V = (1.49 * (R^(2/3)) * (Sf^0.5)) / n
R = Aq / Wp
Tc = (Lf / V) / (3600 sec/hr)
Where :

Tc = Time of Concentration (hr)
Lf = Flow Length (ft)
R = Hydraulic Radius (ft)
Aq = Flow Area (ft²)
Wp = Wetted Perimeter (ft)
V = Velocity (ft/sec)
Sf = Slope (ft/ft)
n = Manning's roughness
100 Year Storm Analysis
Post-Development
User: RRG Page 6 of 50 2557
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subarea Subarea Subarea
Sheet Flow Computations A B C
Manning's Roughness : 0.4 0.00 0.00
Flow Length (ft) : 100 0.00 0.00
Slope (%) : 8.9 0.00 0.00
2 yr, 24 hr Rainfall (in) : 3.74 0.00 0.00
Velocity (ft/sec) : 0.15 0.00 0.00
Computed Flow Time (min) : 10.93 0.00 0.00
Subarea Subarea Subarea
Shallow Concentrated Flow Computations A B C
Flow Length (ft) : 933 0.00 0.00
Slope (%) : 4.8 0.00 0.00
Surface Type : Unpaved Unpaved Unpaved
Velocity (ft/sec) : 3.53 0.00 0.00
Computed Flow Time (min) : 4.41 0.00 0.00
Subarea Subarea Subarea
Channel Flow Computations A B C
Manning's Roughness : 0.012 0.00 0.00
Flow Length (ft) : 71 0.00 0.00
Channel Slope (%) : 1 0.00 0.00
Cross Section Area (ft²) : 7 0.00 0.00
Wetted Perimeter (ft) : 9.8 0.00 0.00
Velocity (ft/sec) : 9.92 0.00 0.00
Computed Flow Time (min) : 0.12 0.00 0.00
Total TOC (min) ..................15.46
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 5.19 Peak Runoff (cfs) ........................................................... 6.74 Weighted Curve Number ............................................... 81.40 Time of Concentration (days hh:mm:ss) ........................ 0 00:15:28 100 Year Storm Analysis
Post-Development
User: RRG Page 7 of 50 2558
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : A02
Input Data
Area (ac) ........................................................................ 4.02 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 81.08 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved roads with curbs & sewers 0.22 D 98.00
Woods & grass combination, Fair 1.00 C 76.00
Woods & grass combination, Fair 0.20 C 76.00
Woods & grass combination, Fair 2.60 D 82.00
Composite Area & Weighted CN 4.02 81.08
Time of Concentration
Subarea Subarea Subarea
Sheet Flow Computations A B C
Manning's Roughness : 0.4 0.00 0.00
Flow Length (ft) : 100 0.00 0.00
Slope (%) : 8 0.00 0.00
2 yr, 24 hr Rainfall (in) : 3.74 0.00 0.00
Velocity (ft/sec) : 0.15 0.00 0.00
Computed Flow Time (min) : 11.41 0.00 0.00
Subarea Subarea Subarea
Shallow Concentrated Flow Computations A B C
Flow Length (ft) : 925 0.00 0.00
Slope (%) : 4 0.00 0.00
Surface Type : Unpaved Unpaved Unpaved
Velocity (ft/sec) : 3.23 0.00 0.00
Computed Flow Time (min) : 4.77 0.00 0.00
Subarea Subarea Subarea
Channel Flow Computations A B C
Manning's Roughness : 0.012 0.00 0.00
Flow Length (ft) : 79 0.00 0.00
Channel Slope (%) : 1 0.00 0.00
Cross Section Area (ft²) : 7.7 0.00 0.00
Wetted Perimeter (ft) : 9.8 0.00 0.00
Velocity (ft/sec) : 10.57 0.00 0.00
Computed Flow Time (min) : 0.12 0.00 0.00
Total TOC (min) ..................16.31
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 5.15 Peak Runoff (cfs) ........................................................... 5.17 Weighted Curve Number ............................................... 81.08 Time of Concentration (days hh:mm:ss) ........................ 0 00:16:19 100 Year Storm Analysis
Post-Development
User: RRG Page 8 of 50 2559
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : A03
Input Data
Area (ac) ........................................................................ 4.49 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 82.72 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved roads with curbs & sewers 0.39 D 98.00
Woods & grass combination, Fair 0.50 C 76.00
Woods & grass combination, Fair 3.60 D 82.00
Composite Area & Weighted CN 4.49 82.72
Time of Concentration
Subarea Subarea Subarea
Sheet Flow Computations A B C
Manning's Roughness : 0.4 0.00 0.00
Flow Length (ft) : 100 0.00 0.00
Slope (%) : 7 0.00 0.00
2 yr, 24 hr Rainfall (in) : 2.85 0.00 0.00
Velocity (ft/sec) : 0.12 0.00 0.00
Computed Flow Time (min) : 13.79 0.00 0.00
Subarea Subarea Subarea
Shallow Concentrated Flow Computations A B C
Flow Length (ft) : 964 0.00 0.00
Slope (%) : 4 0.00 0.00
Surface Type : Unpaved Unpaved Unpaved
Velocity (ft/sec) : 3.23 0.00 0.00
Computed Flow Time (min) : 4.97 0.00 0.00
Subarea Subarea Subarea
Channel Flow Computations A B C
Manning's Roughness : 0.012 0.00 0.00
Flow Length (ft) : 75 0.00 0.00
Channel Slope (%) : 1 0.00 0.00
Cross Section Area (ft²) : 7.74 0.00 0.00
Wetted Perimeter (ft) : 9.8 0.00 0.00
Velocity (ft/sec) : 10.61 0.00 0.00
Computed Flow Time (min) : 0.12 0.00 0.00
Total TOC (min) ..................18.88
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 5.34 Peak Runoff (cfs) ........................................................... 5.93 Weighted Curve Number ............................................... 82.72 Time of Concentration (days hh:mm:ss) ........................ 0 00:18:53 100 Year Storm Analysis
Post-Development
User: RRG Page 9 of 50 2560
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B01
Input Data
Area (ac) ........................................................................ 0.22 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.22 D 98.00
Composite Area & Weighted CN 0.22 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.40 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 10 of 50 2561
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B02
Input Data
Area (ac) ........................................................................ 0.23 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.23 D 98.00
Composite Area & Weighted CN 0.23 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.41 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 11 of 50 2562
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B03
Input Data
Area (ac) ........................................................................ 0.33 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.33 D 98.00
Composite Area & Weighted CN 0.33 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.58 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 12 of 50 2563
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B04
Input Data
Area (ac) ........................................................................ 0.33 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.33 D 98.00
Composite Area & Weighted CN 0.33 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.58 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 13 of 50 2564
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B05
Input Data
Area (ac) ........................................................................ 0.36 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.36 D 98.00
Composite Area & Weighted CN 0.36 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.63 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 14 of 50 2565
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B06
Input Data
Area (ac) ........................................................................ 0.36 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.36 D 98.00
Composite Area & Weighted CN 0.36 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.65 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 15 of 50 2566
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B07
Input Data
Area (ac) ........................................................................ 0.46 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.46 D 98.00
Composite Area & Weighted CN 0.46 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.81 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 16 of 50 2567
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B08
Input Data
Area (ac) ........................................................................ 0.23 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.23 D 98.00
Composite Area & Weighted CN 0.23 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.41 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 17 of 50 2568
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B09
Input Data
Area (ac) ........................................................................ 0.22 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.22 D 98.00
Composite Area & Weighted CN 0.22 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.40 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 18 of 50 2569
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B10
Input Data
Area (ac) ........................................................................ 0.16 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.16 D 98.00
Composite Area & Weighted CN 0.16 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.28 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 19 of 50 2570
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B11
Input Data
Area (ac) ........................................................................ 0.25 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.25 D 98.00
Composite Area & Weighted CN 0.25 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.44 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 20 of 50 2571
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B12
Input Data
Area (ac) ........................................................................ 0.49 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.49 D 98.00
Composite Area & Weighted CN 0.49 98.00
Time of Concentration
User-Defined TOC override (minutes): 6.00
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.86 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 21 of 50 2572
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B13
Input Data
Area (ac) ........................................................................ 0.38 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.38 D 98.00
Composite Area & Weighted CN 0.38 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.68 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 22 of 50 2573
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B14
Input Data
Area (ac) ........................................................................ 0.32 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.32 D 98.00
Composite Area & Weighted CN 0.32 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.58 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 23 of 50 2574
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B15
Input Data
Area (ac) ........................................................................ 0.35 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.35 D 98.00
Composite Area & Weighted CN 0.35 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.62 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 24 of 50 2575
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B16
Input Data
Area (ac) ........................................................................ 0.17 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.17 D 98.00
Composite Area & Weighted CN 0.17 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.29 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 25 of 50 2576
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B17
Input Data
Area (ac) ........................................................................ 0.19 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.19 D 98.00
Composite Area & Weighted CN 0.19 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.33 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 26 of 50 2577
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B18
Input Data
Area (ac) ........................................................................ 0.11 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.11 D 98.00
Composite Area & Weighted CN 0.11 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.19 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 27 of 50 2578
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B19
Input Data
Area (ac) ........................................................................ 0.21 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.21 D 98.00
Composite Area & Weighted CN 0.21 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.37 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 28 of 50 2579
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B20
Input Data
Area (ac) ........................................................................ 0.24 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.24 D 98.00
Composite Area & Weighted CN 0.24 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.42 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 29 of 50 2580
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B21
Input Data
Area (ac) ........................................................................ 0.26 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.26 D 98.00
Composite Area & Weighted CN 0.26 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.46 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 30 of 50 2581
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B22
Input Data
Area (ac) ........................................................................ 0.27 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.27 D 98.00
Composite Area & Weighted CN 0.27 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.48 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 31 of 50 2582
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B23
Input Data
Area (ac) ........................................................................ 0.23 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.23 D 98.00
Composite Area & Weighted CN 0.23 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.41 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 32 of 50 2583
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B24
Input Data
Area (ac) ........................................................................ 0.14 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.14 D 98.00
Composite Area & Weighted CN 0.14 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.24 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 33 of 50 2584
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B25
Input Data
Area (ac) ........................................................................ 0.16 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.16 D 98.00
Composite Area & Weighted CN 0.16 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.28 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 34 of 50 2585
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B26
Input Data
Area (ac) ........................................................................ 0.08 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.08 D 98.00
Composite Area & Weighted CN 0.08 98.00
Time of Concentration
User-Defined TOC override (minutes): 6.00
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.15 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 35 of 50 2586
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B27
Input Data
Area (ac) ........................................................................ 0.04 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.04 D 98.00
Composite Area & Weighted CN 0.04 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.07 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 36 of 50 2587
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B28
Input Data
Area (ac) ........................................................................ 0.08 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.08 D 98.00
Composite Area & Weighted CN 0.08 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.15 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 37 of 50 2588
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B29
Input Data
Area (ac) ........................................................................ 0.06 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.06 D 98.00
Composite Area & Weighted CN 0.06 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.10 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 38 of 50 2589
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B30
Input Data
Area (ac) ........................................................................ 0.04 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.04 D 98.00
Composite Area & Weighted CN 0.04 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.07 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 39 of 50 2590
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B31
Input Data
Area (ac) ........................................................................ 0.04 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.04 D 98.00
Composite Area & Weighted CN 0.04 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.07 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 40 of 50 2591
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B32
Input Data
Area (ac) ........................................................................ 0.04 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.04 D 98.00
Composite Area & Weighted CN 0.04 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.07 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 41 of 50 2592
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B33
Input Data
Area (ac) ........................................................................ 0.09 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.09 D 98.00
Composite Area & Weighted CN 0.09 98.00
Time of Concentration
User-Defined TOC override (minutes): 6
Subbasin Runoff Results
Total Rainfall (in) ............................................................ 7.36 Total Runoff (in) ............................................................. 7.12 Peak Runoff (cfs) ........................................................... 0.16 Weighted Curve Number ............................................... 98.00 Time of Concentration (days hh:mm:ss) ........................ 0 00:06:00 100 Year Storm Analysis
Post-Development
User: RRG Page 42 of 50 2593
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Subbasin : B34
Input Data
Area (ac) ........................................................................ 0.10 Peak Rate Factor ........................................................... 484.00 Weighted Curve Number ............................................... 98.00 Rain Gage ID ................................................................. Rain Gage-02 Composite Curve Number
Area Soil Curve
Soil/Surface Description (acres) Group Number
Paved parking & roofs 0.10 D 98.00
Composite Area & Weighted CN 0.10 98.00
Time of Concentration
100 Year Storm Analysis
Post-Development
User: RRG Page 43 of 50 2594
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Junction Input
SN Element Invert Ground/Rim Ground/Rim Initial Initial Surcharge Surcharge Ponded ID Elevation (Max) (Max) Water Water Elevation Depth Area Elevation Offset Elevation Depth
(ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft²)
1 A1.1-Structure 19.10 21.00 1.90 19.10 0.00 21.00 0.00 0.00 2 A1-Structure 16.03 37.64 21.61 16.03 0.00 37.64 0.00 0.00 3 A2.1-Structure 19.10 21.00 1.90 19.10 0.00 21.00 0.00 0.00 4 A2-Structure 15.56 20.55 4.99 15.56 0.00 20.55 0.00 0.00 5 A3-Structure 15.13 19.11 3.98 15.13 0.00 19.11 0.00 0.00 6 A4-Structure 14.86 20.27 5.41 14.86 0.00 20.27 0.00 0.00 7 A5-Structure 13.86 20.07 6.21 13.86 0.00 20.07 0.00 0.00 8 B1-Structure 12.20 20.13 7.93 12.20 0.00 20.13 0.00 0.00 9 C1-Structure 19.10 21.00 1.90 19.10 0.00 21.00 0.00 0.00 10 C2-Structure 12.20 36.86 24.66 12.20 0.00 36.86 0.00 0.00 11 D1-Structure 19.10 21.00 1.90 19.10 0.00 21.00 0.00 0.00 12 D2-Structure 12.20 38.65 26.45 12.20 0.00 38.65 0.00 0.00 13 D3-Structure 10.50 16.50 6.00 10.50 0.00 13.25 -3.25 0.00 14 D4-Structure 10.63 13.10 2.47 10.63 0.00 14.00 0.90 0.00 15 E10.1-Structure 19.10 21.07 1.97 19.10 0.00 21.07 0.00 0.00 16 E10-Structure 12.29 20.26 7.97 12.29 0.00 20.26 0.00 0.00 17 E11-Structure 11.95 20.26 8.31 11.95 0.00 20.26 0.00 0.00 18 E13.1-Structure 19.10 21.07 1.97 19.10 0.00 21.07 0.00 0.00 19 E13-Structure 11.61 20.26 8.65 11.61 0.00 20.26 0.00 0.00 20 E14.2-Structure 19.10 21.07 1.97 19.10 0.00 21.07 0.00 0.00 21 E14-Structure 11.22 20.25 9.03 11.22 0.00 20.25 0.00 0.00 22 E15-Structure 10.79 20.25 9.46 10.79 0.00 20.25 0.00 0.00 23 E16-Structure 10.62 20.13 9.51 10.62 0.00 20.13 0.00 0.00 24 E1-Structure 15.10 19.22 4.12 15.10 0.00 19.22 0.00 0.00 25 E2-Structure 14.73 20.26 5.53 14.73 0.00 20.26 0.00 0.00 26 E4.1-Structure 19.10 21.08 1.98 19.10 0.00 21.08 0.00 0.00 27 E4-Structure 14.45 20.30 5.85 14.45 0.00 20.30 0.00 0.00 28 E5-Structure 14.37 20.09 5.72 14.37 0.00 20.09 0.00 0.00 29 E6-Structure 14.02 20.20 6.18 14.02 0.00 20.20 0.00 0.00 30 E7.1-Structure 19.10 21.07 1.97 19.10 0.00 21.07 0.00 0.00 31 E7-Structure 13.23 20.26 7.03 13.23 0.00 20.26 0.00 0.00 32 E8-Structure 12.93 20.26 7.33 12.93 0.00 20.26 0.00 0.00 33 E9.1-Structure 19.10 21.07 1.97 19.10 0.00 21.07 0.00 0.00 34 E9-Structure 12.62 20.26 7.64 12.62 0.00 20.26 0.00 0.00 35 Jun-01 0.00 10.50 10.50 0.00 0.00 0.00 -10.50 0.00
36 Jun-02 0.00 6.00 6.00 0.00 0.00 6.00 0.00 0.00
37 Jun-03 0.00 6.00 6.00 0.00 0.00 6.00 0.00 0.00
38 Jun-04 19.20 6.00 -13.20 0.00 -19.20 6.00 0.00 0.00
39 Jun-05 18.20 6.00 -12.20 0.00 -18.20 6.00 0.00 0.00
40 Jun-06 14.60 6.00 -8.60 0.00 -14.60 6.00 0.00 0.00
41 Jun-07 13.20 6.00 -7.20 0.00 -13.20 6.00 0.00 0.00
42 Jun-08 19.20 6.00 -13.20 0.00 -19.20 6.00 0.00 0.00
43 Jun-09 14.60 6.00 -8.60 0.00 -14.60 0.00 -6.00 0.00
44 Out-1A15-Pipe 10.50 16.50 6.00 10.50 0.00 16.50 0.00 0.00 45 Out-1B1-Pipe 10.50 16.50 6.00 10.50 0.00 16.50 0.00 0.00 46 Out-1C2-Pipe 10.50 16.50 6.00 10.50 0.00 16.50 0.00 0.00 47 Out-1D4-Pipe 10.50 16.50 6.00 10.50 0.00 16.50 0.00 0.00 48 Out-1E16-Pipe 10.50 16.50 6.00 10.50 0.00 0.00 -16.50 0.00 49 Out-1Pipe (53) 10.50 16.50 6.00 10.50 0.00 16.50 0.00 0.00 50 Out-1Pipe (59) 10.50 16.50 6.00 10.50 0.00 16.50 0.00 0.00 51 Out-1Pipe (62) 10.50 16.50 6.00 10.50 0.00 16.50 0.00 0.00 52 Structure - 100 19.10 19.83 0.73 19.10 0.00 19.83 0.00 0.00 53 Structure - 101 11.91 19.47 7.56 11.91 0.00 19.47 0.00 0.00 54 Structure - 102 19.10 19.83 0.73 19.10 0.00 19.83 0.00 0.00 55 Structure - 103 11.59 19.48 7.89 11.59 0.00 19.48 0.00 0.00 56 Structure - 104 19.10 19.83 0.73 19.10 0.00 19.83 0.00 0.00 57 Structure - 105 11.09 19.41 8.31 11.09 0.00 19.41 0.00 0.00 58 Structure - 35 10.76 18.50 7.74 10.76 0.00 18.50 0.00 0.00 59 Structure - 36 10.59 20.13 9.54 10.59 0.00 20.13 0.00 0.00 60 Structure - 38 28.60 31.31 2.71 28.60 0.00 31.31 0.00 0.00 61 Structure - 39 27.61 32.57 4.96 27.61 0.00 32.57 0.00 0.00 62 Structure - 48 26.48 1.78 -24.70 26.48 0.00 1.78 0.00 0.00 63 Structure - 49 25.31 29.72 4.41 25.31 0.00 29.72 0.00 0.00 64 Structure - 75 10.63 13.10 2.47 10.63 0.00 14.00 0.90 0.00 65 Structure - 83 10.63 13.10 2.47 10.63 0.00 14.00 0.90 0.00 66 Structure - 87 10.63 13.10 2.47 10.63 0.00 14.00 0.90 0.00 67 Structure - 91 19.10 21.10 2.00 19.10 0.00 21.10 0.00 0.00 68 Structure - 94 19.10 19.83 0.73 19.10 0.00 19.83 0.00 0.00 69 Structure - 95 13.30 19.40 6.10 13.30 0.00 19.40 0.00 0.00 70 Structure - 96 19.10 19.83 0.73 19.10 0.00 19.83 0.00 0.00 71 Structure - 97 12.86 19.42 6.56 12.86 0.00 19.42 0.00 0.00 72 Structure - 98 19.10 19.83 0.73 19.10 0.00 19.83 0.00 0.00 73 Structure - 99 12.39 19.44 7.04 12.39 0.00 19.44 0.00 0.00 100 Year Storm Analysis
Post-Development
User: RRG Page 44 of 50 2595
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Junction Results
SN Element Peak Peak Max HGL Max HGL Max Min Average HGL Average HGL Time of Time of Total Total Time ID Inflow Lateral Elevation Depth Surcharge Freeboard Elevation Depth Max HGL Peak Flooded Flooded Inflow Attained Attained Depth Attained Attained Attained Occurrence Flooding Volume Attained Occurrence
(cfs) (cfs) (ft) (ft) (ft) (ft) (ft) (ft) (days hh:mm) (days hh:mm) (ac-in) (min) 1 A1.1-Structure 0.3 0.3 19.28 0.18 0.00 1.73 19.17 0.07 0 07:49 0 00:00 0.00 0.00 2 A1-Structure 5.7 0.3 18.56 2.53 0.00 19.08 18.36 2.33 0 08:02 0 00:00 0.00 0.00 3 A2.1-Structure 0.4 0.4 19.31 0.21 0.00 1.69 19.18 0.08 0 07:49 0 00:00 0.00 0.00 4 A2-Structure 6.3 0.2 18.43 2.87 0.00 2.12 18.30 2.74 0 07:50 0 00:00 0.00 0.00 5 A3-Structure 6.7 0.4 16.35 1.22 0.00 2.76 15.52 0.39 0 08:01 0 00:00 0.00 0.00 6 A4-Structure 12.6 0.0 17.16 2.30 0.00 3.11 16.95 2.09 0 08:03 0 00:00 0.00 0.00 7 A5-Structure 13.2 0.2 18.52 4.66 0.00 1.55 18.39 4.53 0 07:50 0 00:00 0.00 0.00 8 B1-Structure 0.5 0.5 12.33 0.13 0.00 7.80 12.25 0.05 0 07:50 0 00:00 0.00 0.00 9 C1-Structure 0.4 0.4 19.31 0.21 0.00 1.69 19.18 0.08 0 07:49 0 00:00 0.00 0.00 10 C2-Structure 0.8 0.4 18.42 6.22 0.00 18.44 18.29 6.09 0 07:50 0 00:00 0.00 0.00 11 D1-Structure 0.3 0.3 19.29 0.19 0.00 1.71 19.18 0.08 0 07:49 0 00:00 0.00 0.00 12 D2-Structure 0.7 0.4 18.40 6.20 0.00 20.25 18.29 6.09 0 07:50 0 00:00 0.00 0.00 13 D3-Structure 0.7 0.0 10.65 0.15 0.00 5.85 10.56 0.06 0 07:50 0 00:00 0.00 0.00 14 D4-Structure 4.3 0.0 11.53 0.90 0.00 1.57 11.00 0.37 0 08:13 0 00:00 0.00 0.00 15 E10.1-Structure 0.6 0.6 19.35 0.25 0.00 1.72 19.20 0.10 0 07:50 0 00:00 0.00 0.00 16 E10-Structure 3.4 0.2 18.70 6.41 0.00 1.56 18.54 6.25 0 07:50 0 00:00 0.00 0.00 17 E11-Structure 3.6 0.2 12.64 0.69 0.00 7.62 12.22 0.27 0 07:52 0 00:00 0.00 0.00 18 E13.1-Structure 0.6 0.6 19.37 0.27 0.00 1.70 19.20 0.10 0 07:50 0 00:00 0.00 0.00 19 E13-Structure 4.2 0.1 18.79 7.18 0.00 1.47 18.62 7.01 0 07:50 0 00:00 0.00 0.00 20 E14.2-Structure 0.3 0.3 19.28 0.18 0.00 1.79 19.17 0.07 0 07:49 0 00:00 0.00 0.00 21 E14-Structure 4.7 0.2 18.64 7.42 0.00 1.61 18.53 7.31 0 07:49 0 00:00 0.00 0.00 22 E15-Structure 5.0 0.3 11.77 0.98 0.00 8.48 11.16 0.37 0 07:52 0 00:00 0.00 0.00 23 E16-Structure 5.2 0.2 11.60 0.98 0.00 8.53 10.99 0.37 0 07:52 0 00:00 0.00 0.00 24 E1-Structure 0.2 0.2 15.26 0.16 0.00 3.96 15.16 0.06 0 07:49 0 00:00 0.00 0.00 25 E2-Structure 0.2 0.1 14.91 0.18 0.00 5.35 14.80 0.07 0 07:54 0 00:00 0.00 0.00 26 E4.1-Structure 0.4 0.4 19.32 0.22 0.00 1.76 19.19 0.09 0 07:49 0 00:00 0.00 0.00 27 E4-Structure 0.2 0.0 14.64 0.19 0.00 5.66 14.53 0.08 0 07:54 0 00:00 0.00 0.00 28 E5-Structure 0.8 0.2 18.64 4.27 0.00 1.45 18.50 4.13 0 07:50 0 00:00 0.00 0.00 29 E6-Structure 0.9 0.1 14.40 0.38 0.00 5.80 14.17 0.15 0 07:52 0 00:00 0.00 0.00 30 E7.1-Structure 0.9 0.9 19.41 0.31 0.00 1.66 19.22 0.12 0 07:50 0 00:00 0.00 0.00 31 E7-Structure 1.8 0.1 18.75 5.52 0.00 1.51 18.56 5.33 0 07:50 0 00:00 0.00 0.00 32 E8-Structure 1.9 0.1 13.43 0.50 0.00 6.83 13.13 0.20 0 07:51 0 00:00 0.00 0.00 33 E9.1-Structure 0.7 0.7 19.38 0.28 0.00 1.69 19.21 0.11 0 07:50 0 00:00 0.00 0.00 34 E9-Structure 2.7 0.1 18.87 6.25 0.00 1.39 18.70 6.08 0 07:50 0 00:00 0.00 0.00 35 Jun-01 6.4 6.4 0.00 0.00 0.00 10.50 0.00 0.00 0 00:00 0 00:00 0.00 0.00 36 Jun-02 6.7 6.7 32.70 32.70 0.00 0.80 32.25 32.25 0 08:01 0 00:00 0.00 0.00 37 Jun-03 6.7 0.0 30.70 30.70 0.00 0.80 30.25 30.25 0 08:01 0 00:00 0.00 0.00 38 Jun-04 7.8 1.1 19.20 0.00 0.00 0.00 19.20 0.00 0 00:00 0 00:00 0.00 0.00 39 Jun-05 7.8 0.0 19.13 0.93 0.00 0.57 18.51 0.31 0 08:01 0 00:00 0.00 0.00 40 Jun-06 8.1 0.3 14.60 0.00 0.00 0.00 14.60 0.00 0 00:00 0 00:00 0.00 0.00 41 Jun-07 8.3 0.3 14.04 0.84 0.00 0.66 13.49 0.29 0 08:01 0 00:00 0.00 0.00 42 Jun-08 7.8 0.0 20.13 0.93 0.00 0.57 19.51 0.31 0 08:01 0 00:00 0.00 0.00 43 Jun-09 8.1 0.0 15.44 0.84 0.00 0.66 14.89 0.29 0 08:01 0 00:00 0.00 0.00 44 Out-1A15-Pipe 17.0 0.0 12.05 1.55 0.00 4.45 11.05 0.55 0 08:02 0 00:00 0.00 0.00 45 Out-1B1-Pipe 0.5 0.0 10.63 0.13 0.00 5.87 10.55 0.05 0 07:50 0 00:00 0.00 0.00 46 Out-1C2-Pipe 0.8 0.0 10.67 0.17 0.00 5.83 10.57 0.07 0 07:50 0 00:00 0.00 0.00 47 Out-1D4-Pipe 4.3 0.0 11.40 0.90 0.00 5.10 10.87 0.37 0 08:13 0 00:00 0.00 0.00 48 Out-1E16-Pipe 5.2 0.0 11.37 0.87 0.00 5.13 10.83 0.33 0 07:52 0 00:00 0.00 0.00 49 Out-1Pipe (53) 4.3 0.0 11.29 0.79 0.00 5.21 10.83 0.33 0 08:13 0 00:00 0.00 0.00 50 Out-1Pipe (59) 4.3 0.0 11.39 0.89 0.00 5.11 10.86 0.36 0 08:13 0 00:00 0.00 0.00 51 Out-1Pipe (62) 4.3 0.0 11.39 0.89 0.00 5.11 10.87 0.37 0 08:13 0 00:00 0.00 0.00 52 Structure - 100 0.6 0.6 19.36 0.26 0.00 0.47 19.20 0.10 0 07:50 0 00:00 0.00 0.00 53 Structure - 101 15.7 0.0 18.66 6.75 0.00 0.81 18.50 6.59 0 07:50 0 00:00 0.00 0.00 54 Structure - 102 0.6 0.6 19.36 0.26 0.00 0.47 19.20 0.10 0 07:50 0 00:00 0.00 0.00 55 Structure - 103 16.2 0.0 18.66 7.07 0.00 0.82 18.50 6.91 0 07:50 0 00:00 0.00 0.00 56 Structure - 104 0.4 0.4 19.34 0.24 0.00 0.49 19.19 0.09 0 07:49 0 00:00 0.00 0.00 57 Structure - 105 16.6 0.0 18.55 7.46 0.00 0.86 18.40 7.31 0 07:50 0 00:00 0.00 0.00 58 Structure - 35 16.6 0.0 12.29 1.53 0.00 6.21 11.31 0.55 0 08:01 0 00:00 0.00 0.00 59 Structure - 36 17.0 0.5 12.14 1.55 0.00 7.99 11.14 0.55 0 08:01 0 00:00 0.00 0.00 60 Structure - 38 5.2 5.2 29.46 0.86 0.00 1.85 28.89 0.29 0 08:01 0 00:00 0.00 0.00 61 Structure - 39 5.2 0.0 29.08 1.47 0.00 3.49 28.51 0.90 0 08:02 0 00:00 0.00 0.00 62 Structure - 48 5.9 5.9 27.17 0.69 0.00 0.81 26.73 0.25 0 08:03 0 00:00 0.00 0.00 63 Structure - 49 5.9 0.0 26.48 1.17 0.00 3.24 26.04 0.73 0 08:03 0 00:00 0.00 0.00 64 Structure - 75 4.3 0.0 11.42 0.79 0.00 1.68 10.96 0.33 0 08:13 0 00:00 0.00 0.00 65 Structure - 83 4.3 0.0 11.52 0.89 0.00 1.58 10.99 0.36 0 08:13 0 00:00 0.00 0.00 66 Structure - 87 4.3 0.0 11.52 0.89 0.00 1.58 11.00 0.37 0 08:13 0 00:00 0.00 0.00 67 Structure - 91 0.4 0.4 19.32 0.22 0.00 1.78 19.19 0.09 0 07:49 0 00:00 0.00 0.00 68 Structure - 94 0.8 0.8 19.45 0.35 0.00 0.37 19.23 0.13 0 07:50 0 00:00 0.00 0.00 69 Structure - 95 13.9 0.0 18.76 5.46 0.00 0.64 18.54 5.24 0 07:51 0 00:00 0.00 0.00 70 Structure - 96 0.7 0.7 19.41 0.31 0.00 0.42 19.22 0.12 0 07:50 0 00:00 0.00 0.00 71 Structure - 97 14.5 0.0 18.71 5.85 0.00 0.71 18.52 5.66 0 07:50 0 00:00 0.00 0.00 72 Structure - 98 0.6 0.6 19.40 0.30 0.00 0.42 19.22 0.12 0 07:50 0 00:00 0.00 0.00 73 Structure - 99 15.1 0.0 18.70 6.31 0.00 0.73 18.52 6.13 0 07:51 0 00:00 0.00 0.00 100 Year Storm Analysis
Post-Development
User: RRG Page 45 of 50 2596
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Pipe Input
SN Element Length Inlet Outlet Average Pipe Pipe Pipe Manning's Entrance Exit/Bend Additional Flap No. of ID Invert Invert Slope Shape Diameter or Width Roughness Losses Losses Losses Gate Barrels Elevation Elevation Height
(ft) (ft) (ft) (%) (in) (in)
1 A1.1-Pipe 43.57 19.10 18.23 2.0000 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 2 A10.1-Pipe 34.83 19.10 18.40 2.0000 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 3 A10-Pipe 91.67 12.39 11.91 0.5300 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 4 A11.1-Pipe 34.86 19.10 18.40 2.0000 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 5 A11-Pipe 67.33 11.91 11.59 0.4700 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 6 A12.1-Pipe 39.58 19.10 18.31 2.0000 CIRCULAR 8.040 8.040 0.0150 0.5000 0.5000 0.0000 No 1 7 A12-Pipe 100.61 11.59 11.09 0.4900 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 8 A13-Pipe 63.49 11.09 10.76 0.5200 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 9 A14-Pipe 37.44 10.76 10.59 0.4500 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 10 A15-Pipe 19.67 10.59 10.50 0.4600 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 11 A1-Pipe 32.78 27.61 18.23 28.6100 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 12 A2.1-Pipe 44.00 19.10 18.22 2.0000 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 13 A2-Pipe 97.50 16.03 15.56 0.4800 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 14 A3-Pipe 88.50 15.56 15.13 0.4900 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 15 A4.1-Pipe 39.16 25.31 16.82 21.6900 CIRCULAR 18.000 18.000 0.0120 0.5000 0.5000 0.0000 No 1 16 A4-Pipe 56.66 15.13 14.86 0.4800 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 17 A5-Pipe 107.77 14.86 13.86 0.9300 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 18 A6.1-Pipe 42.40 19.10 18.31 1.8700 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 19 A7.1-Pipe 34.69 19.10 18.41 2.0000 CIRCULAR 8.040 8.040 0.0150 0.5000 0.5000 0.0000 No 1 20 A7-Pipe 110.61 13.86 13.30 0.5100 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 21 A8.1-Pipe 34.74 19.10 18.41 2.0000 CIRCULAR 8.040 8.040 0.0150 0.5000 0.5000 0.0000 No 1 22 A8-Pipe 89.33 13.30 12.86 0.4900 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 23 A9.1-Pipe 34.78 19.10 18.40 2.0100 CIRCULAR 8.040 8.040 0.0150 0.5000 0.5000 0.0000 No 1 24 A9-Pipe 95.00 12.86 12.39 0.4900 CIRCULAR 30.000 30.000 0.0150 0.5000 0.5000 0.0000 No 1 25 B1-Pipe 19.69 12.20 10.50 8.6300 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 26 C1-Pipe 44.64 19.10 18.21 2.0000 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 27 C2-Pipe 19.67 12.20 10.50 8.6400 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 28 D1-Pipe 44.46 19.10 18.21 2.0000 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 29 D2-Pipe 19.67 12.20 10.50 8.6400 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 30 D4-Pipe 26.30 10.63 10.50 0.4900 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 31 E10-Pipe 68.72 12.29 11.95 0.5000 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 32 E11-Pipe 67.31 11.95 11.61 0.5000 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 33 E12.1-Pipe 28.75 19.10 18.52 2.0200 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 34 E13.1-Pipe 31.82 19.10 18.46 2.0000 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 35 E13-Pipe 77.56 11.61 11.22 0.5000 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 36 E14-Pipe 88.49 11.22 10.79 0.4900 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 37 E15-Pipe 61.58 10.79 10.62 0.2800 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 38 E16-Pipe 26.19 10.62 10.50 0.4600 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 39 E1-Pipe 73.22 15.10 14.73 0.5000 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 40 E2-Pipe 55.47 14.73 14.45 0.5000 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 41 E4-Pipe 15.97 14.45 14.37 0.5000 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 42 E5.1-Pipe 32.89 19.10 18.42 2.0800 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 43 E5-Pipe 70.61 14.37 14.02 0.5000 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 44 E6.1-Pipe 28.85 19.10 18.44 2.2800 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 45 E6-Pipe 58.54 14.02 13.73 0.5000 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 46 E7-Pipe 59.55 13.23 12.93 0.5000 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 47 E8.1-Pipe 25.28 19.10 18.59 2.0000 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 48 E8-Pipe 61.63 12.93 12.62 0.5000 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 49 E9.1-Pipe 30.97 19.10 18.44 2.1200 CIRCULAR 8.040 8.040 0.0120 0.5000 0.5000 0.0000 No 1 50 E9-Pipe 66.95 12.62 12.29 0.5000 CIRCULAR 24.000 24.000 0.0150 0.5000 0.5000 0.0000 No 1 51 Link-01 178.44 10.50 0.00 5.8800 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 52 Link-02 117.22 9.00 0.00 7.6800 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 53 Link-03 30.02 10.50 0.00 34.9800 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 54 Link-04 60.81 10.50 0.00 17.2700 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 55 Link-05 138.79 10.50 0.00 7.5700 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 56 Link-11 71.00 32.00 30.00 2.8200 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 57 Link-12 417.20 0.00 0.00 0.0000 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 58 Link-14 128.08 0.00 0.00 0.0000 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 59 Link-16 317.29 0.00 0.00 0.0000 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 60 Link-17 137.86 10.50 0.00 7.6200 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 61 Link-18 99.47 10.50 0.00 10.5600 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 62 Link-19 130.31 10.50 0.00 8.0600 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 63 Link-20 191.76 10.50 0.00 5.4800 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 64 Link-29 48.58 19.20 18.82 0.7800 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 65 Link-30 67.00 19.20 18.20 1.4900 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 66 Link-31 46.31 14.60 14.60 0.0000 Dummy 0.000 0.000 0.0150 0.5000 0.5000 0.0000 No 1 67 Link-32 64.00 14.60 13.20 2.1900 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 68 Pipe (24) 45.94 28.60 28.22 0.8300 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 69 Pipe (34) 46.55 26.48 25.79 1.4800 CIRCULAR 18.000 18.000 0.0120 0.5000 0.5000 0.0000 No 1 70 Pipe (53) 27.49 10.63 10.50 0.4700 CIRCULAR 18.000 18.000 0.0120 0.5000 0.5000 0.0000 No 1 71 Pipe (59) 25.67 10.63 10.50 0.5100 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 72 Pipe (62) 25.95 10.63 10.50 0.5000 CIRCULAR 18.000 18.000 0.0150 0.5000 0.5000 0.0000 No 1 100 Year Storm Analysis
Post-Development
User: RRG Page 46 of 50 2597
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Pipe Results
SN Element Peak Time of Design Flow Peak Flow/ Peak Flow Travel Peak Flow Peak Flow Total Time Froude Reported ID Flow Peak Flow Capacity Design Flow Velocity Time Depth Depth/ Surcharged Number Condition Occurrence Ratio Total Depth
Ratio
(cfs) (days hh:mm) (cfs) (ft/sec) (min) (ft) (min)
1 A1.1-Pipe 0.3 0 07:50 1.9 0.15 3.84 0.19 0.18 0.26 0.00 Calculated 2 A10.1-Pipe 0.6 0 07:50 1.9 0.31 4.68 0.12 0.26 0.38 0.00 Calculated 3 A10-Pipe 15.1 0 08:02 25.9 0.58 5.47 0.28 1.37 0.55 0.00 Calculated 4 A11.1-Pipe 0.6 0 07:50 1.9 0.31 4.68 0.12 0.26 0.38 0.00 Calculated 5 A11-Pipe 15.7 0 08:02 24.5 0.64 5.28 0.21 1.45 0.58 0.00 Calculated 6 A12.1-Pipe 0.4 0 07:50 1.5 0.27 3.62 0.18 0.24 0.36 0.00 Calculated 7 A12-Pipe 16.2 0 08:02 25.0 0.65 5.41 0.31 1.47 0.59 0.00 Calculated 8 A13-Pipe 16.6 0 08:01 25.7 0.64 5.57 0.19 1.46 0.58 0.00 Calculated 9 A14-Pipe 16.6 0 08:02 24.0 0.69 5.26 0.12 1.53 0.61 0.00 Calculated 10 A15-Pipe 17.0 0 08:02 24.1 0.71 5.31 0.06 1.55 0.62 0.00 Calculated 11 A1-Pipe 5.2 0 08:02 48.7 0.11 17.94 0.03 0.33 0.22 0.00 Calculated 12 A2.1-Pipe 0.4 0 07:50 1.9 0.21 4.22 0.17 0.21 0.31 0.00 Calculated 13 A2-Pipe 5.7 0 08:02 6.3 0.90 4.05 0.40 1.12 0.74 0.00 Calculated 14 A3-Pipe 6.3 0 08:01 6.4 0.99 4.10 0.36 1.22 0.81 0.00 Calculated 15 A4.1-Pipe 5.9 0 08:03 53.0 0.11 19.80 0.03 0.34 0.23 0.00 Calculated 16 A4-Pipe 6.7 0 08:01 24.5 0.27 4.25 0.22 0.89 0.36 0.00 Calculated 17 A5-Pipe 12.6 0 08:02 34.3 0.37 6.44 0.28 1.05 0.42 0.00 Calculated 18 A6.1-Pipe 0.4 0 07:50 1.8 0.23 4.15 0.17 0.22 0.32 0.00 Calculated 19 A7.1-Pipe 0.8 0 07:51 1.5 0.55 4.34 0.13 0.35 0.53 0.00 Calculated 20 A7-Pipe 13.2 0 08:02 25.3 0.52 5.21 0.35 1.28 0.51 0.00 Calculated 21 A8.1-Pipe 0.7 0 07:50 1.5 0.44 4.10 0.14 0.31 0.46 0.00 Calculated 22 A8-Pipe 13.9 0 08:02 24.9 0.56 5.21 0.29 1.34 0.53 0.00 Calculated 23 A9.1-Pipe 0.6 0 07:51 1.5 0.43 4.09 0.14 0.30 0.46 0.00 Calculated 24 A9-Pipe 14.5 0 08:02 24.9 0.58 5.27 0.30 1.37 0.55 0.00 Calculated 25 B1-Pipe 0.5 0 07:50 57.6 0.01 5.50 0.06 0.13 0.06 0.00 Calculated 26 C1-Pipe 0.4 0 07:50 1.9 0.21 4.22 0.18 0.21 0.31 0.00 Calculated 27 C2-Pipe 0.8 0 07:50 57.6 0.01 6.54 0.05 0.17 0.08 0.00 Calculated 28 D1-Pipe 0.3 0 07:50 1.9 0.18 4.00 0.19 0.19 0.29 0.00 Calculated 29 D2-Pipe 0.7 0 07:50 57.6 0.01 6.25 0.05 0.15 0.08 0.00 Calculated 30 D4-Pipe 4.3 0 08:13 6.4 0.67 3.88 0.11 0.90 0.60 0.00 Calculated 31 E10-Pipe 3.4 0 07:52 13.9 0.24 3.64 0.31 0.67 0.34 0.00 Calculated 32 E11-Pipe 3.6 0 07:52 13.9 0.26 3.69 0.30 0.69 0.35 0.00 Calculated 33 E12.1-Pipe 0.6 0 07:50 1.9 0.33 4.79 0.10 0.27 0.40 0.00 Calculated 34 E13.1-Pipe 0.3 0 07:49 1.9 0.16 3.88 0.14 0.18 0.27 0.00 Calculated 35 E13-Pipe 4.2 0 07:52 13.9 0.31 3.88 0.33 0.76 0.38 0.00 Calculated 36 E14-Pipe 4.7 0 07:52 13.7 0.34 3.94 0.37 0.81 0.40 0.00 Calculated 37 E15-Pipe 5.0 0 07:52 10.3 0.49 3.25 0.32 0.98 0.49 0.00 Calculated 38 E16-Pipe 5.2 0 07:52 13.3 0.39 3.96 0.11 0.87 0.43 0.00 Calculated 39 E1-Pipe 0.2 0 07:54 6.4 0.02 1.46 0.84 0.16 0.11 0.00 Calculated 40 E2-Pipe 0.2 0 07:54 6.4 0.03 1.69 0.55 0.19 0.12 0.00 Calculated 41 E4-Pipe 0.2 0 07:53 6.3 0.03 1.67 0.16 0.19 0.13 0.00 Calculated 42 E5.1-Pipe 0.4 0 07:50 1.9 0.23 4.41 0.12 0.22 0.33 0.00 Calculated 43 E5-Pipe 0.8 0 07:52 6.4 0.13 2.48 0.47 0.36 0.24 0.00 Calculated 44 E6.1-Pipe 0.9 0 07:50 2.0 0.44 5.46 0.09 0.31 0.46 0.00 Calculated 45 E6-Pipe 0.9 0 07:52 6.4 0.14 2.57 0.38 0.38 0.25 0.00 Calculated 46 E7-Pipe 1.8 0 07:51 13.9 0.13 3.06 0.32 0.49 0.25 0.00 Calculated 47 E8.1-Pipe 0.7 0 07:50 1.9 0.37 4.89 0.09 0.28 0.42 0.00 Calculated 48 E8-Pipe 1.9 0 07:51 13.8 0.14 3.08 0.33 0.50 0.25 0.00 Calculated 49 E9.1-Pipe 0.6 0 07:50 1.9 0.30 4.78 0.11 0.25 0.38 0.00 Calculated 50 E9-Pipe 2.7 0 07:51 13.8 0.19 3.39 0.33 0.59 0.30 0.00 Calculated 51 Link-01 5.2 0 07:52 0.0 0.19 0.00 0.59 0.30 0.00 Calculated 52 Link-02 0.7 0 07:50 0.0 0.19 0.00 0.59 0.30 0.00 Calculated 53 Link-03 0.8 0 07:50 0.0 0.19 0.00 0.59 0.30 0.00 Calculated 54 Link-04 0.5 0 07:50 0.0 0.19 0.00 0.59 0.30 0.00 Calculated 55 Link-05 17.0 0 08:02 0.0 0.19 0.00 0.59 0.30 0.00 Calculated 56 Link-11 6.7 0 08:01 15.3 0.44 8.37 0.14 0.70 0.47 0.00 Calculated 57 Link-12 6.7 0 08:01 0.0 0.44 0.00 0.70 0.47 0.00 Calculated 58 Link-14 7.8 0 08:01 0.0 0.44 0.00 0.70 0.47 0.00 Calculated 59 Link-16 8.3 0 08:01 0.0 0.44 0.00 0.70 0.47 0.00 Calculated 60 Link-17 4.3 0 08:13 0.0 0.44 0.00 0.70 0.47 0.00 Calculated 61 Link-18 4.3 0 08:13 0.0 0.44 0.00 0.70 0.47 0.00 Calculated 62 Link-19 4.3 0 08:13 0.0 0.44 0.00 0.70 0.47 0.00 Calculated 63 Link-20 4.3 0 08:13 0.0 0.44 0.00 0.70 0.47 0.00 Calculated 64 Link-29 7.8 0 08:01 0.0 0.44 0.00 0.70 0.47 0.00 Calculated 65 Link-30 7.8 0 08:01 11.1 0.70 6.81 0.16 0.93 0.62 0.00 Calculated 66 Link-31 8.1 0 08:01 0.0 0.70 0.00 0.93 0.62 0.00 Calculated 67 Link-32 8.1 0 08:01 13.5 0.60 7.95 0.13 0.84 0.56 0.00 Calculated 68 Pipe (24) 5.2 0 08:02 8.3 0.62 4.94 0.15 0.86 0.57 0.00 Calculated 69 Pipe (34) 5.9 0 08:03 13.9 0.43 7.54 0.10 0.69 0.46 0.00 Calculated 70 Pipe (53) 4.3 0 08:13 7.8 0.55 4.52 0.10 0.79 0.53 0.00 Calculated 71 Pipe (59) 4.3 0 08:13 6.5 0.66 3.91 0.11 0.89 0.59 0.00 Calculated 72 Pipe (62) 4.3 0 08:13 6.4 0.66 3.90 0.11 0.89 0.59 0.00 Calculated 100 Year Storm Analysis
Post-Development
User: RRG Page 47 of 50 2598
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Storage Nodes
Storage Node : Detention-Basin
Input Data

10.50 15.50

5.00 0.00
-10.50
12634.80

0.00 Infiltration/Exfiltration

0.0900
Storage Area Volume Curves
Storage Curve : Storage-01
Stage Storage Storage
Area Volume
(ft) (ft²) (ft³)
0 11997.07 0.000

0.1 12209.57 1210.33

0.2 12422.63 2441.94

0.3 12636.25 3694.88

0.4 12850.44 4969.21

0.5 13065.18 6264.99

0.6 13280.49 7582.27

0.7 13496.37 8921.11

0.8 13712.80 10281.57

0.9 13929.80 11663.70
1 14147.36 13067.56

1.1 14365.48 14493.20

1.2 14584.17 15940.68

1.3 14803.41 17410.06

1.4 15023.22 18901.39

1.5 15243.59 20414.73

1.6 15464.53 21950.14

1.7 15686.02 23507.67

1.8 15908.08 25087.38

1.9 16130.71 26689.32
2 16353.89 28313.55

2.1 16577.64 29960.13

2.2 16801.95 31629.11

2.3 17026.82 33320.55

2.4 17252.25 35034.50

2.5 17478.25 36771.03

2.6 17704.81 38530.18

2.7 17931.93 40312.02

2.8 18159.61 42116.60

2.9 18387.86 43943.97
3 18616.66 45794.20

3.1 18846.04 47667.34

3.2 19075.97 49563.44

3.3 19306.46 51482.56

3.4 19537.52 53424.76

3.5 19769.14 55390.09

3.6 20001.33 57378.61

3.7 20234.07 59390.38

3.8 20467.38 61425.45

3.9 20701.25 63483.88
4 20935.68 65565.73

4.1 21170.68 67671.05

4.2 21406.24 69799.90

4.3 21642.36 71952.33

4.4 21879.04 74128.40

4.5 22116.28 76328.17

4.6 22354.09 78551.69

4.7 22592.46 80799.02

4.8 22831.39 83070.21

4.9 23070.89 85365.32
5 23310.95 87684.41
Evaporation Loss ..........................................................

Exfiltration Rate (in/hr) ..................................................

Invert Elevation (ft) ........................................................

Max (Rim) Elevation (ft) ................................................

Max (Rim) Offset (ft) .....................................................

Initial Water Elevation (ft) ..............................................

Initial Water Depth (ft) ...................................................

Ponded Area (ft²) .......................................................... 100 Year Storm Analysis
Post-Development
User: RRG Page 48 of 50 2599
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
100 Year Storm Analysis
Post-Development
User: RRG Page 49 of 50 2600
Project: SDG Commerce 220
Project No.: 4122068.0
SEP 2023
Storage Node : Detention-Basin (continued)
Outflow Orifices
SN Element Orifice Orifice Flap Circular Rectangular Rectangular Orifice Orifice ID Type Shape Gate Orifice Orifice Orifice Invert Coefficient Diameter Height Width Elevation
(in) (in) (in) (ft)
1 Orifice-01 Side Rectangular No 9.00 12.00 11.00 0.63
2 Orifice-02 Side Rectangular No 9.00 12.00 11.00 0.63
3 Orifice-03 Side Rectangular No 9.00 12.00 11.00 0.63
4 Orifice-04 Side Rectangular No 9.00 12.00 11.00 0.63
Output Summary Results

23.85 0.00

17.07 2.10

12.66 2.16

11.38 0.88
0 08:13

2.470
0 0

0.00 Total Flooded Volume (ac-in) .......................................

Total Time Flooded (min) ..............................................

Total Retention Time (sec) ...........................................

Max HGL Elevation Attained (ft) ...................................

Max HGL Depth Attained (ft) .........................................

Average HGL Elevation Attained (ft) .............................

Average HGL Depth Attained (ft) ..................................

Time of Max HGL Occurrence (days hh:mm) ...............

Total Exfiltration Volume (1000-ft³) ...............................

Peak Inflow (cfs) ...........................................................

Peak Lateral Inflow (cfs) ...............................................

Peak Outflow (cfs) ........................................................

Peak Exfiltration Flow Rate (cfm) ................................. 100 Year Storm Analysis
Post-Development
User: RRG Page 50 of 50 2601
Autodesk Storm and Sanitary Analysis
2602
Autodesk Storm and Sanitary Analysis
2603
Hydraulic Calculations
SDG Commerce 220 Distribution Center
ATTACHMENT 3
10-Year HGL PIPE PROFILE
2604
Autodesk Storm and Sanitary Analysis
2605
Autodesk Storm and Sanitary Analysis
2606
Autodesk Storm and Sanitary Analysis
2607
2608
1515 Fourth Street, Napa, CA 94559 www.rsacivil.com (707) 252-3301 v. (707) 252-4966 f.

STORMWATER CONTROL PLAN

FOR A REGULATED PROJECT
For
Commerce 220 Distribution Center
American Canyon, CA

THIS REPORT WAS PREPARED IN CONJUNCTION WITH THE INSTRUCTIONS, CRITERIA, AND

MINIMUM REQUIREMENTS IN THE BAY AREA STORMWATER MANAGEMENT AGENCIES ASSOCIATION’S (BASMAA’S) POST CONSTRUCTION MANUAL.

Prepared for:

SDG Commerce 220, LLC
413 W. Yosemite Avenue, Suite 105
Madera, CA 93637
Project No. 4122068.0
July 21, 2023
2609

STORMWATER CONTROL PLAN FOR A REGULATED PROJECT
COMMERCE 220 DISTRIBUTION CENTER
Table of Contents
I. Project Data...................................................................................................................................... 1 II. Setting............................................................................................................................................... 1 II.A. Project Location and Description.............................................................................................. 1 II.B. Existing Site Features and Conditions....................................................................................... 1 II.C. Opportunities and Constraints for Stormwater Control........................................................... 1 III. Low Impact Development Design Strategies................................................................................... 2 III.A. Optimization of Site Layout....................................................................................................... 2 III.B. Use of Permeable Pavements ................................................................................................... 2 III.C. Dispersal of Runoff to Pervious Areas....................................................................................... 2 III.D. Stormwater Control Measures ................................................................................................. 2 IV. Documentation of Drainage............................................................................................................. 3 IV.A Drainage Management Areas ................................................................................................... 3 IV.B. Tabulation and Sizing Calculations............................................................................................ 3 V. Source Control Measures................................................................................................................. 4 V.A. Site activities and potential sources of pollutants.................................................................... 4 V.B. Features, Materials, and Methods of Construction of Source Control BMPs........................... 7 VI. Stormwater Facility Maintenance ................................................................................................... 7 VI.A. Ownership and Responsibility for Maintenance in Perpetuity................................................. 7 VI.B. Summary of Maintenance Requirements for Each Stormwater Facility .................................. 7 VII. Construction Checklist...................................................................................................................... 7 VIII. Certifications .................................................................................................................................... 8 2610

STORMWATER CONTROL PLAN FOR A REGULATED PROJECT
COMMERCE 220 DISTRIBUTION CENTER
TABLES
Table 1. Project Data
Table 2. Drainage Management Areas
Table 3. Bioretention Basin Design
Table 4. Self-treating Areas
Table 5. Self-retaining Areas
Table 6. Areas Draining to Self-treating Areas
Table 7. Areas Draining to Bioretention Basins
Table 8. Alternate BMP’s
Table 9. Sources and Source Control Measures
Table 10. Construction Plan C.3 Checklist

ATTACHMENTS

1. Vicinity Map, FIRMETTE, Hydrologic Soil Group Map

2. Stormwater Control Plan
2611

STORMWATER CONTROL PLAN FOR A REGULATED PROJECT
COMMERCE 220 DISTRIBUTION CENTER

Page 1 of 8 ends

I. Project Data
Table 1. Project Data Form
Project Name/Number Commerce 220 Distribution Center (4122068.0) Application Submittal Date March 17, 2023
Project Location 1055 Commerce Ct.

American Canyon, California 94503
APN: 058-030-069
Project Phase Conditional Use Permit
Project Type and Description New warehouse
Total Project Site Area (acres) 10.2 Acres
Total New and Replaced Impervious Surface Area 346,605 sq. ft Total Pre-Project Impervious Surface Area 0 sq. ft
Total Post-Project Impervious Surface Area 346,605 sq. ft II. Setting
II.A. Project Location and Description
The Commerce 220 Distribution Center project is located on Commerce Ct. in American Canyon, California 94503. The APN is 058-030-069. Refer to Attachment 1 for the Vicinity Map. The parcel is zoned as Commercial Recreation (CR) by the City of American Canyon and is currently undeveloped. The project will include the construction of a new warehouse and parking area. The warehouse will function as a distribution center. This project will not be phased and will be built in a single phase of construction. Refer to Attachment 2 for Site Stormwater Control Plan.

The proposed area to be disturbed is greater than 1 acre, so a Stormwater Pollution Prevention Plan will be prepared and a Notice of Intent (NOI) will be obtained prior to the beginning of construction.

II.B. Existing Site Features and Conditions
The existing site is currently an undeveloped grassy field. Access to the parcel is off of Commerce Ct.

Features of the site include grasses and shrubs and a gravel road along the eastern side of the parcel. The site is bounded by undeveloped parcels to the east and west, a commercial warehouse to the south and a commercial warehouse currently under construction to the north.

The predominant soil type in the project area is Haire clay loam, which is of the Hydraulic Soil Group D.

Refer to Attachment 1 for the Soils Map. The project area is relatively flat with gentle slopes to the west.

Stormwater is ultimately conveyed to the Napa River.

II.C. Opportunities and Constraints for Stormwater Control Stormwater treatment facilities have been integrated into the planning, design, construction, operation, and maintenance of the proposed development. The following potential opportunities and constraints were considered in determining the best stormwater control design for this development. 2612

STORMWATER CONTROL PLAN FOR A REGULATED PROJECT
COMMERCE 220 DISTRIBUTION CENTER

Page 2 of 8 ends

Opportunities for the site include landscaped areas to the west of the building. A bioretention basin will be installed in this area to treat stormwater runoff prior to discharge from the site. Runoff will be conveyed to the bioretention basin via surface flows and an on-site storm drain network.

Constraints include the site location and existing grades. The site is generally flat and is not located near an existing storm drain system. To accommodate this, the warehouse was designed at a finished floor elevation so that stormwater could flow into the bioretention basin, and the subsequent outflow from this basin would outfall onto nearby fields along existing drainage patterns.

III. Low Impact Development Design Strategies
III.A. Optimization of Site Layout

1. Limitation of development envelope
The shallow slopes of the site make the chosen development areas suitable for development.

2. Preservation of natural drainage features
Natural existing drainage features include mapped wetlands on-site as well as gently sloping terrain that allows stormwater runoff to remain as predominantly sheet flow. A bioretention/detention basin has been proposed for the project to treat and detain storm water before it leaves the site. Level spreaders are proposed at the outfall of the proposed bioretention/detention basin to allow post-development stormwater runoff to be returned to sheet flow.

3. Minimization of imperviousness
Walkways and parking areas are designed to the minimum widths necessary without compromising public safety and a walkable environment.

4. Use of drainage as a design element
A bioretention/detention basin is incorporated into the aesthetic landscape design of the site.

III.B. Use of Permeable Pavements
Permeable pavements are not proposed at this time.

III.C. Dispersal of Runoff to Pervious Areas
Stormwater runoff will be directed to the bioretention/detention basin.

III.D. Stormwater Control Measures
A bioretention basin has been incorporated as a stormwater control measure. The bioretention basin will collect and treat onsite stormwater as well as from portions of Commerce Boulevard.

Refer to Attachment 2 for Stormwater Control Plan.
2613

STORMWATER CONTROL PLAN FOR A REGULATED PROJECT
COMMERCE 220 DISTRIBUTION CENTER

Page 3 of 8 ends

IV. Documentation of Drainage
IV.A Drainage Management Areas
Table 2. Drainage Management Areas
DMA
Name
Impervious Area
(square feet)
Pervious Area
(square feet)
Total Area
(square feet)
DMA 1 297,608 11,720 309,328
DMA 2 0 12,083 12,083
DMA 3 48,997 1,744 50,741
Drainage Management Area Description
DMA 1 consists of the warehouse roof area, the parking areas, and drive aisles. Stormwater is conveyed via storm drains to Bioretention Facility 1 on the west side of the property.

DMA 2 consists of the landscaped area within the proposed bioretention/detention basin west of the warehouse and parking areas. This area will drain to Bioretention Facility 1.

DMA 3 consists of the parking lot and landscaped area south of the warehouse. This area will drain to the south via sheet flow and storm drains to neighboring Bioretention Facility located on Commerce 330 Distribution Center. The Commerce 330 Bioretention Facility was designed to accommodate up to 56,200 SF of new impervious area from the Commerce 220 parcel.

STA 1 is a Self-Treating area that does not receive stormwater runoff from the proposed improvements and consists of grassy areas on the west side of the parcel that drains directly off-site.

STA 2 is a Self-Treating area that does not receive stormwater runoff from the proposed improvements and consists of grassy areas and mapped wetlands on the north side of the parcel that drains directly offsite.

IV.B. Tabulation and Sizing Calculations
Table 3. Information Summary for Bioretention Basin and Alternate BMP Design DMA Total Project Area
(Square Feet)
DMA 1 309,328
DMA 2 12,083
Table 4. Self-Treating Areas
DMA Total Project Area
(Square Feet)
STA 1 14,747
STA 2 62,066
2614

STORMWATER CONTROL PLAN FOR A REGULATED PROJECT
COMMERCE 220 DISTRIBUTION CENTER

Page 4 of 8 ends

Table 5. Self-Retaining Areas
There are no Self-Retaining Areas.

Table 6. Areas Draining to Self-Retaining Areas
There are no impervious areas draining to Self-Retaining Areas.

Table 7. Areas Draining to Bioretention Basins
DMA Name
DMA Area
(Square
Feet)
Post-project
surface type
DMA
Runoff
Factor
DMA
Area x
Runoff
Factor
Basin Name
Bioretention Facility 1
DMA 1 297,608 Impervious 1 297,608
Sizing
Factor
Minimum
Basin size
Proposed
Basin
DMA 1 11,720 Pervious 0.1 1,172
DMA 2 0 Impervious 1 0
DMA 2 12,083 Pervious 0.1 1,208
Total> 299,988 0.04 12,000 12,638
Table 8. Alternate BMPs
There are no Alternate BMPs.

V. Source Control Measures
V.A. Site activities and potential sources of pollutants The site activities and potential sources of pollutants for the Commerce 220 Distribution Center project are listed in table 9, below:

Table 9. Control Table
Potential Sources of Runoff Pollutants Permanent Source Control BMPs Operational Source Control BMPs A. On-site storm drain inlets
(unauthorized non-stormwater
discharges and accidental spills or
leaks)
Mark all inlets with the
words “No Dumping! Flows
to River” or similar.

Maintain and periodically
repaint or replace inlet
markings.

Provide stormwater pollution
prevention information to
new site owners, lessees, or
operators.

See applicable operational
BMPs in Fact Sheet SC-74,
“Drainage System
Maintenance.”
Include the following in lease
agreements: “Tenant shall
not allow anyone to
discharge anything to storm
drains or to store or deposit
materials so as to create a
potential discharge to storm
drains."
2615

STORMWATER CONTROL PLAN FOR A REGULATED PROJECT
COMMERCE 220 DISTRIBUTION CENTER

Page 5 of 8 ends

Potential Sources of Runoff Pollutants Permanent Source Control BMPs Operational Source Control BMPs B. Interior floor drains and elevator shaft
sump pumps
Interior floor drains will be
plumbed to the sanitary sewer. Inspect and maintain drains to prevent blockages and overflow.

C. Interior parking garages N/A N/A
D1. Need for future indoor & structural
pest control
Building design shall
incorporate features that
discourage entry of pests.

Provide Integrated Pest
Management information to
owners, lessees, and
operators.

D2. Landscape / outdoor pesticide use /
building and grounds maintenance
Final landscape plans will
accomplish all of the
following:

Preserve existing native
trees, shrubs, and ground
cover to the maximum
extent possible.

Minimize irrigation and
runoff, to promote surface
infiltration where
appropriate, and to
minimize the use of
fertilizers and pesticides
that can contribute to
stormwater pollution.

Where landscaped areas
are used to retain or detain
stormwater, specify plants
that are tolerant of
saturated soil conditions.

Use pest-resistant plants,
especially adjacent to
hardscape.

To ensure successful
establishment, select plants
appropriate to site soils,
slopes, climate, sun, wind,
rain, land use, air
movement, ecological
consistency, and plant
interactions.

Maintain landscaping using
minimum or no pesticides.

See applicable operational
BMPs in Fact Sheet SC-41,
“Building and Grounds
Maintenance.”
Provide IPM information to
new owners, lessees and
operators.

E. Pools, spas, ponds, decorative
fountains, and other water features N/A N/A
F. Food service N/A N/A
G. Refuse areas Refuse areas shall be paved
with an impervious surface,
designed not to allow runon from adjoining areas,
and screened to prevent
off-site transport of trash.

Refuse areas shall contain a
roof to minimize direct
precipitation.

Refuse areas will consist of
shared trash enclosures
with the Commerce 330
Distribution Center. These
do not have connections to
the sanitary sewer and will
Provide adequate number of
receptacles.

Inspect receptacles regularly;
repair or replace leaky
receptacles.

Keep receptacles covered.

Prohibit/prevent dumping of
liquid or hazardous wastes.

Post “no hazardous
materials” signs.

Inspect and pick up litter daily
and clean up spills
immediately.

Keep spill control materials
available on-site.
2616

STORMWATER CONTROL PLAN FOR A REGULATED PROJECT
COMMERCE 220 DISTRIBUTION CENTER

Page 6 of 8 ends

Potential Sources of Runoff Pollutants Permanent Source Control BMPs Operational Source Control BMPs continue to be cleaned and
dry swept as necessary.

Clean by dry-sweeping only,
or with wet/dry vacuum.

See Fact Sheet SC-34, “Waste
Handling and Disposal”
H. Industrial processes N/A N/A
I. Outdoor Storage of Equipment or
Materials N/A N/A
J. Vehicle / equipment cleaning N/A N/A
K. Vehicle / equipment repair and
maintenance N/A N/A
L. Fuel dispensing areas N/A N/A
M. Loading docks Loading docks utilize a
dock seal at each dock to
prevent spills and leaks
from reaching exterior
storm drain system.

Clean up spills prior to
disconnecting trucks from
loading docks.

N. Fire sprinkler test water Fire sprinkler test water
shall be discharged to the
sanitary sewer.

See the note in Fact Sheet SC41, “Building and Grounds Maintenance”
O. Miscellaneous drain or wash water or
other sources
Boiler drain lines
Condensate drain lines
Rooftop equipment
Drainage sumps
Roofing, gutters, and trim
Other sources
Boiler drain lines shall be
directly or indirectly
connected to the sanitary
sewer system and may not
discharge to the storm
drain.

Condensate drain lines may
discharge to landscaped
areas if the flow is small
enough that runoff will not
occur. Condensate drain
lines may not discharge to
the storm drain system.

Rooftop equipment with
potential to produce
pollutants shall be roofed
and/or have secondary
containment.

Any drainage sumps on-site
shall feature a sediment
sump to reduce the
quantity of sediment in
pumped water.

If architectural copper is
used, implement the
following BMPs for
management of rinse water
during installation:

If possible, purchase copper
materials that have been prepatinated at the factory.

If patination is done on-site,
prevent rinse water from
entering storm drains by
discharging to landscaping or
by collecting in a tank and
hauling off-site.

Consider coating the copper
materials with an impervious
coating that prevents further
corrosion and runoff.

Implement the following
BMPs during routine
maintenance:

Prevent rinse water from
entering storm drains by
discharging to landscaping or
by collecting in a tank and
hauling off-site.

P. Plazas, sidewalks, and parking lots Sweep plazas, sidewalks, and parking lots regularly to
prevent accumulation of litter
and debris. Collect debris
from pressure washing to
prevent entry into the storm
drain system. Collect wash
water containing any cleaning
agent or degreaser and
discharge to the sanitary
sewer not to a storm drain.
2617

STORMWATER CONTROL PLAN FOR A REGULATED PROJECT
COMMERCE 220 DISTRIBUTION CENTER

Page 7 of 8 ends

V.B. Features, Materials, and Methods of Construction of Source Control BMPs Source control BMPs will be designed and implemented per construction specifications and CASQA BMP fact sheets.

VI. Stormwater Facility Maintenance
VI.A. Ownership and Responsibility for Maintenance in Perpetuity The applicant accepts responsibility for interim operation and maintenance of stormwater treatment and flow-control facilities until such time as this responsibility is formally transferred to a subsequent owner.

The owner shall execute a Post-Construction BMP Maintenance Agreement with the City of American Canyon upon request.

VI.B. Summary of Maintenance Requirements for Each Stormwater Facility The site incorporates one bioretention facility. The bioretention facility requires as-needed maintenance for any damage that may occur. Semi-annual inspections are required for possible erosion, damaged vegetation, debris, and health of any trees or shrubs. These inspections usually occur at the beginning of the wet season and end of the wet season. Any dead or diseased vegetation should be removed and replaced during the inspection. An annual inspection is required to complete the annual report for the bioretention basin. During this inspection mulch may be added, and tree stakes and wires replaced.

VII. Construction Checklist
Table 10. Construction Checklist
Stormwater
Control Plan
Page #
Source Control or Treatment Control Measure Sheet
3 Bioretention Basin DMA, UP3.0,
UP3.3
4 A. On-site storm drain inlets UP3.0, UP3.1,
UP4.0
4 B. Interior floor drains and elevator shaft sump pumps See Architectural Plan
4 D1. Need for future indoor & structural pest control See Architectural Plan
4 & 5 D2. Landscape/ outdoor pesticide use/ building and ground maintenance
See Landscape
Plan
5 G. Refuse areas See Architectural
Plan
6 M. Loading docks See Architectural
Plan
6 N. Fire sprinkler test water See Architectural
Plan
6 O. Miscellaneous drain or wash See Architectural
Plan
6 P. Plazas, sidewalks, and parking lots UP3.0, UP3.1
2618

STORMWATER CONTROL PLAN FOR A REGULATED PROJECT
COMMERCE 220 DISTRIBUTION CENTER

Page 8 of 8 ends

VIII. Certifications
The preliminary design of stormwater treatment facilities and other stormwater pollution control measures in this Stormwater Control Plan are in accordance with the current edition of the BASMAA PostConstruction Manual. 2619

STORMWATER CONTROL PLAN FOR A REGULATED PROJECT
COMMERCE 220 DISTRIBUTION CENTER
ATTACHMENT 1
Vicinity Map, FEMA FIRMette, Hydrologic Soil Group Map
2620
2621
2622
2623
2624
2625
2626

STORMWATER CONTROL PLAN FOR A REGULATED PROJECT
COMMERCE 220 DISTRIBUTION CENTER
ATTACHMENT 2
Stormwater Control Plan
2627
2628
City of American Canyon—SDG Commerce 220 Distribution Center Project Draft EIR
FirstCarbon Solutions
Appendix H:

Noise Supporting Information
2629

THIS PAGE INTENTIONALLY LEFT BLANK
2630
Mobile Construction Activity Noise Calculation
Receptor: Noise Level Calculation Prior to Implementation of Noise Attenuation Requirements No. Equipment Description Lmax Lmax Leq
1 Backhoe 85 1 40 1200 1 3 54.4 36.6 4585.917802
2 Front End Loader 85 1 40 1230 1 3 54.2 36.3 4258.48057 3 Scraper 85 1 40 1280 1 3 53.8 35.8 3778.67983
4 Rubber Tired Dozer 85 1 40 1330 1 3 53.5 35.3 3368.333475 5 Front End Loader 85 1 40 1380 1 3 53.2 34.8 3015.315396 6 7
8 9
10 Notes: Lmax[4] 54 Leq 43
[1] Percentage of time activity occurs each hour
[2] Soft ground terrain between project site and receptor. [3] Shielding due to terrain or structures
[4] Calculated Lmax is the Loudest value.

Ldn Calculations
Time Hourly Leq Leq' 0.1*Leq antiLog
Night 12:00 AM 0.0 10.0 1 10
1:00 AM 0.0 10.0 1 10
2:00 AM 0.0 10.0 1 10
3:00 AM 0.0 10.0 1 10
4:00 AM 0.0 10.0 1 10
5:00 AM 0.0 10.0 1 10
6:00 AM 0.0 10.0 1 10
Day 7:00 AM 42.8 42.8 4.278907339 19006.72707
8:00 AM 42.8 42.8 4.278907339 19006.72707
9:00 AM 42.8 42.8 4.278907339 19006.72707
10:00 AM 42.8 42.8 4.278907339 19006.72707
11:00 AM 42.8 42.8 4.278907339 19006.72707
12:00 PM 42.8 42.8 4.278907339 19006.72707
1:00 PM 42.8 42.8 4.278907339 19006.72707
2:00 PM 42.8 42.8 4.278907339 19006.72707
3:00 PM 42.8 42.8 4.278907339 19006.72707
4:00 PM 42.8 42.8 4.278907339 19006.72707
5:00 PM 42.8 42.8 4.278907339 19006.72707
6:00 PM 42.8 42.8 4.278907339 19006.72707
7:00 PM 0.0 0.0 0 1
8:00 PM 0.0 0.0 0 1
9:00 PM 0.0 0.0 0 1
Night 10:00 PM 0.0 10.0 1 10
11:00 PM 0.0 10.0 1 10
Sum 228173.7249
Sum/24 9507.238536
Log10(Sum/24) 3.97805439
10*Log10(Sum/24) 39.7805439
24 Hour Ldn 40
Mobile Construction Activity Noise Calculation
Receptor: Noise Level Calculation Prior to Implementation of Noise Attenuation Requirements No. Equipment Description Lmax Lmax Leq
1 Backhoe 85 1 40 900 1 5 54.9 38.4 6858.710562
2 Front End Loader 85 1 40 950 1 5 54.4 37.7 5831.7539
3 Scraper 85 1 40 950 1 5 54.4 37.7 5831.7539
4 Rubber Tired Dozer 85 1 40 1000 1 5 54.0 37.0 5000
5 Front End Loader 85 1 40 1000 1 5 54.0 37.0 5000
6 7
8 9
10 Notes: Lmax[4] 55 Leq 45
[1] Percentage of time activity occurs each hour
[2] Soft ground terrain between project site and receptor. [3] Shielding due to terrain or structures
[4] Calculated Lmax is the Loudest value.

Ldn Calculations
Time Hourly Leq Leq' 0.1*Leq antiLog
Night 12:00 AM 0.0 10.0 1 10
1:00 AM 0.0 10.0 1 10
2:00 AM 0.0 10.0 1 10
3:00 AM 0.0 10.0 1 10
4:00 AM 0.0 10.0 1 10
5:00 AM 0.0 10.0 1 10
6:00 AM 0.0 10.0 1 10
Day 7:00 AM 44.6 44.6 4.4551833 28522.21836
8:00 AM 44.6 44.6 4.4551833 28522.21836
9:00 AM 44.6 44.6 4.4551833 28522.21836
10:00 AM 44.6 44.6 4.4551833 28522.21836
11:00 AM 44.6 44.6 4.4551833 28522.21836
12:00 PM 44.6 44.6 4.4551833 28522.21836
1:00 PM 44.6 44.6 4.4551833 28522.21836
2:00 PM 44.6 44.6 4.4551833 28522.21836
3:00 PM 44.6 44.6 4.4551833 28522.21836
4:00 PM 44.6 44.6 4.4551833 28522.21836
5:00 PM 44.6 44.6 4.4551833 28522.21836
6:00 PM 44.6 44.6 4.4551833 28522.21836
7:00 PM 0.0 0.0 0 1
8:00 PM 0.0 0.0 0 1
9:00 PM 0.0 0.0 0 1
Night 10:00 PM 0.0 10.0 1 10
11:00 PM 0.0 10.0 1 10
Sum 342359.6203
Sum/24 14264.98418
Log10(Sum/24) 4.154271294
10*Log10(Sum/24) 41.54271294
24 Hour Ldn 42
Receiving school facility
Shielding
(dBA)[3]
Calculated (dBA)
Energy
Reference
(dBA) 50 ft
Quantity
Usage
factor[1]
Distance to
Receptor
Ground
Effect[2]
Ground
Effect[2]
Shielding
(dBA)[3]
Calculated (dBA)
Energy
Receiving residence east of the project site
Reference
(dBA) 50 ft
Quantity
Usage
factor[1]
Distance to
Receptor
2631
Parking Lot Activity Noise Calculation
Receptor:

No. Equipment Description Lmax Lmax Leq
1 parking lot activity 70 4 10 900 1 3 41.9 25.4 343.7498173 2 parking lot activity 70 6 10 920 1 3 41.7 26.8 482.722766 3 parking lot activity 70 6 10 920 1 3 41.7 26.8 482.722766 4 5
6 7
8 9
10 Notes: Lmax[4] 42 Leq 31
[1] Percentage of time activity occurs each hour
[2] Soft ground terrain between project site and receptor. [3] Shielding due to terrain or structures
[4] Calculated Lmax is the Loudest value.

Ldn Calculations
Time Hourly Leq Leq' 0.1*Leq antiLog
Night 12:00 AM 31.2 41.2 4.117004454 13091.95349
1:00 AM 31.2 41.2 4.117004454 13091.95349
2:00 AM 31.2 41.2 4.117004454 13091.95349
3:00 AM 31.2 41.2 4.117004454 13091.95349
4:00 AM 31.2 41.2 4.117004454 13091.95349
5:00 AM 31.2 41.2 4.117004454 13091.95349
6:00 AM 31.2 41.2 4.117004454 13091.95349
Day 7:00 AM 31.2 31.2 3.117004454 1309.195349
8:00 AM 31.2 31.2 3.117004454 1309.195349
9:00 AM 31.2 31.2 3.117004454 1309.195349
10:00 AM 31.2 31.2 3.117004454 1309.195349
11:00 AM 31.2 31.2 3.117004454 1309.195349
12:00 PM 31.2 31.2 3.117004454 1309.195349
1:00 PM 31.2 31.2 3.117004454 1309.195349
2:00 PM 31.2 31.2 3.117004454 1309.195349
3:00 PM 31.2 31.2 3.117004454 1309.195349
4:00 PM 31.2 31.2 3.117004454 1309.195349
5:00 PM 31.2 31.2 3.117004454 1309.195349
6:00 PM 31.2 31.2 3.117004454 1309.195349
7:00 PM 31.2 31.2 3.117004454 1309.195349
8:00 PM 31.2 31.2 3.117004454 1309.195349
9:00 PM 31.2 31.2 3.117004454 1309.195349
Night 10:00 PM 31.2 41.2 4.117004454 13091.95349
11:00 PM 31.2 41.2 4.117004454 13091.95349
Sum 137465.5117
Sum/24 5727.729653
Log10(Sum/24) 3.757982511
10*Log10(Sum/24) 37.57982511
24 Hour Ldn 38
Parking Lot Activity Noise Calculation
Receptor:

No. Equipment Description Lmax Lmax Leq
1 parking lot activity 70 4 10 1200 1 3 39.4 21.6 145.0194542 2 parking lot activity 70 6 10 1225 1 3 39.2 23.1 204.4810174 3 parking lot activity 70 6 10 1250 1 3 39.0 22.8 192.4558977 4 5
6 7
8 9
10 Notes: Lmax[4] 39 Leq 27
[1] Percentage of time activity occurs each hour
[2] Soft ground terrain between project site and receptor. [3] Shielding due to terrain or structures
[4] Calculated Lmax is the Loudest value.

Ldn Calculations
Time Hourly Leq Leq' 0.1*Leq antiLog
Night 12:00 AM 27.3 37.3 3.733964325 5419.563693
1:00 AM 27.3 37.3 3.733964325 5419.563693
2:00 AM 27.3 37.3 3.733964325 5419.563693
3:00 AM 27.3 37.3 3.733964325 5419.563693
4:00 AM 27.3 37.3 3.733964325 5419.563693
5:00 AM 27.3 37.3 3.733964325 5419.563693
6:00 AM 27.3 37.3 3.733964325 5419.563693
Day 7:00 AM 27.3 27.3 2.733964325 541.9563693
8:00 AM 27.3 27.3 2.733964325 541.9563693
9:00 AM 27.3 27.3 2.733964325 541.9563693
10:00 AM 27.3 27.3 2.733964325 541.9563693
11:00 AM 27.3 27.3 2.733964325 541.9563693
12:00 PM 27.3 27.3 2.733964325 541.9563693
1:00 PM 27.3 27.3 2.733964325 541.9563693
2:00 PM 27.3 27.3 2.733964325 541.9563693
3:00 PM 27.3 27.3 2.733964325 541.9563693
4:00 PM 27.3 27.3 2.733964325 541.9563693
5:00 PM 27.3 27.3 2.733964325 541.9563693
6:00 PM 27.3 27.3 2.733964325 541.9563693
7:00 PM 27.3 27.3 2.733964325 541.9563693
8:00 PM 27.3 27.3 2.733964325 541.9563693
9:00 PM 27.3 27.3 2.733964325 541.9563693
Night 10:00 PM 27.3 37.3 3.733964325 5419.563693
11:00 PM 27.3 37.3 3.733964325 5419.563693
Sum 56905.41877
Sum/24 2371.059116
Log10(Sum/24) 3.374942382
10*Log10(Sum/24) 33.74942382
24 Hour Ldn 34
Ground
Effect[2]
Shielding
(dBA)[3]
Calculated (dBA)
Energy
Receiving school facility
Reference
(dBA) 50 ft
Quantity
Usage
factor[1]
Distance to
Receptor
Calculated (dBA)
Energy
Receiving Couch Residence (east of site)
Reference
(dBA) 50 ft
Quantity
Usage
factor[1]
Distance to
Receptor
Ground
Effect[2]
Shielding
(dBA)[3]
2632
Mechanical Equipment Noise Calculation
Receptor: Noise Level Calculation Prior to Implementation of Noise Attenuation Requirements No. Equipment Description Lmax Lmax Leq
1 Commercial grade mechanical ventilation equipment 60 4 100 900 1 3 25.9 16.3 42.96872716 2 3
4 5
6 7
8 9
10 Notes: Leq 16
[1] Percentage of time activity occurs each hour
[2] Soft ground terrain between project site and receptor. [3] Shielding due to rooftop parapet and soundwall shielding Ldn Calculations
Time Hourly Leq Leq' 0.1*Leq antiLog
Night 12:00 AM 16.3 26.3 2.633152489 429.6872716
1:00 AM 16.3 26.3 2.633152489 429.6872716
2:00 AM 16.3 26.3 2.633152489 429.6872716
3:00 AM 16.3 26.3 2.633152489 429.6872716
4:00 AM 16.3 26.3 2.633152489 429.6872716
5:00 AM 16.3 26.3 2.633152489 429.6872716
6:00 AM 16.3 26.3 2.633152489 429.6872716
Day 7:00 AM 16.3 16.3 1.633152489 42.96872716
8:00 AM 16.3 16.3 1.633152489 42.96872716
9:00 AM 16.3 16.3 1.633152489 42.96872716
10:00 AM 16.3 16.3 1.633152489 42.96872716
11:00 AM 16.3 16.3 1.633152489 42.96872716
12:00 PM 16.3 16.3 1.633152489 42.96872716
1:00 PM 16.3 16.3 1.633152489 42.96872716
2:00 PM 16.3 16.3 1.633152489 42.96872716
3:00 PM 16.3 16.3 1.633152489 42.96872716
4:00 PM 16.3 16.3 1.633152489 42.96872716
5:00 PM 16.3 16.3 1.633152489 42.96872716
6:00 PM 16.3 16.3 1.633152489 42.96872716
7:00 PM 16.3 16.3 1.633152489 42.96872716
8:00 PM 16.3 16.3 1.633152489 42.96872716
9:00 PM 16.3 16.3 1.633152489 42.96872716
Night 10:00 PM 16.3 26.3 2.633152489 429.6872716
11:00 PM 16.3 26.3 2.633152489 429.6872716
Sum 4511.716352
Sum/24 187.9881813
Log10(Sum/24) 2.274130546
10*Log10(Sum/24) 22.74130546
24 Hour Ldn 23
Mechanical Equipment Noise Calculation
Receptor: Noise Level Calculation Prior to Implementation of Noise Attenuation Requirements No. Equipment Description Lmax Lmax Leq
1 Commercial grade mechanical ventilation equipment 60 4 100 1265 1 3 22.9 11.9 15.47420838 2 3
4 5
6 7
8 9
10 Notes: Leq 12
[1] Percentage of time activity occurs each hour
[2] Soft ground terrain between project site and receptor. [3] Shielding due to rooftop parapet and soundwall shielding Ldn Calculations
Time Hourly Leq Leq' 0.1*Leq antiLog
Night 12:00 AM 11.9 21.9 2.189608441 154.7420838
1:00 AM 11.9 21.9 2.189608441 154.7420838
2:00 AM 11.9 21.9 2.189608441 154.7420838
3:00 AM 11.9 21.9 2.189608441 154.7420838
4:00 AM 11.9 21.9 2.189608441 154.7420838
5:00 AM 11.9 21.9 2.189608441 154.7420838
6:00 AM 11.9 21.9 2.189608441 154.7420838
Day 7:00 AM 11.9 11.9 1.189608441 15.47420838
8:00 AM 11.9 11.9 1.189608441 15.47420838
9:00 AM 11.9 11.9 1.189608441 15.47420838
10:00 AM 11.9 11.9 1.189608441 15.47420838
11:00 AM 11.9 11.9 1.189608441 15.47420838
12:00 PM 11.9 11.9 1.189608441 15.47420838
1:00 PM 11.9 11.9 1.189608441 15.47420838
2:00 PM 11.9 11.9 1.189608441 15.47420838
3:00 PM 11.9 11.9 1.189608441 15.47420838
4:00 PM 11.9 11.9 1.189608441 15.47420838
5:00 PM 11.9 11.9 1.189608441 15.47420838
6:00 PM 11.9 11.9 1.189608441 15.47420838
7:00 PM 11.9 11.9 1.189608441 15.47420838
8:00 PM 11.9 11.9 1.189608441 15.47420838
9:00 PM 11.9 11.9 1.189608441 15.47420838
Night 10:00 PM 11.9 21.9 2.189608441 154.7420838
11:00 PM 11.9 21.9 2.189608441 154.7420838
Sum 1624.79188
Sum/24 67.69966165
Log10(Sum/24) 1.830586498
10*Log10(Sum/24) 18.30586498
24 Hour Ldn 18
Calculated (dBA)
Energy
Receiving Couch Residence (east of site)
Reference
(dBA) 25 ft
Quantity
Usage
factor[1]
Distance to
Receptor
Ground
Effect[2]
Shielding
(dBA)[3]
Ground
Effect[2]
Shielding
(dBA)[3]
Calculated (dBA)
Energy
Receiving school facility
Reference
(dBA) 25 ft
Quantity
Usage
factor[1]
Distance to
Receptor
2633
Loading/Unloading Noise Calculation
Receptor: Noise Level Calculation Prior to Implementation of Noise Attenuation Requirements No. Equipment Description Lmax Lmax Leq
1 Loading/Unloading Noise Calculation 70 2 25 1030 1 6 37.7 21.6 143.6707448 2 Loading/Unloading Noise Calculation 70 2 25 1050 1 6 37.6 21.3 135.6163714 3 Loading/Unloading Noise Calculation 70 2 25 1070 1 6 37.4 21.1 128.1529726 4 Loading/Unloading Noise Calculation 70 2 25 1090 1 6 37.2 20.8 121.2273254 5 Loading/Unloading Noise Calculation 70 2 25 1210 1 6 36.3 19.5 88.61840037 6 Loading/Unloading Noise Calculation 70 2 25 1230 1 6 36.2 19.3 84.36546081 7 8
9 10
Notes: Lmax[4] 38 Leq 28
[1] Percentage of time activity occurs each hour
[2] Soft ground terrain between project site and receptor. [3] Shielding due to terrain or structures
[4] Calculated Lmax is the Loudest value.

Ldn Calculations
Time Hourly Leq Leq' 0.1*Leq antiLog
Night 12:00 AM 28.5 38.5 3.846121319 7016.512754
1:00 AM 28.5 38.5 3.846121319 7016.512754
2:00 AM 28.5 38.5 3.846121319 7016.512754
3:00 AM 28.5 38.5 3.846121319 7016.512754
4:00 AM 28.5 38.5 3.846121319 7016.512754
5:00 AM 28.5 38.5 3.846121319 7016.512754
6:00 AM 28.5 38.5 3.846121319 7016.512754
Day 7:00 AM 28.5 28.5 2.846121319 701.6512754
8:00 AM 28.5 28.5 2.846121319 701.6512754
9:00 AM 28.5 28.5 2.846121319 701.6512754
10:00 AM 28.5 28.5 2.846121319 701.6512754
11:00 AM 28.5 28.5 2.846121319 701.6512754
12:00 PM 28.5 28.5 2.846121319 701.6512754
1:00 PM 28.5 28.5 2.846121319 701.6512754
2:00 PM 28.5 28.5 2.846121319 701.6512754
3:00 PM 28.5 28.5 2.846121319 701.6512754
4:00 PM 28.5 28.5 2.846121319 701.6512754
5:00 PM 28.5 28.5 2.846121319 701.6512754
6:00 PM 28.5 28.5 2.846121319 701.6512754
7:00 PM 28.5 28.5 2.846121319 701.6512754
8:00 PM 28.5 28.5 2.846121319 701.6512754
9:00 PM 28.5 28.5 2.846121319 701.6512754
Night 10:00 PM 28.5 38.5 3.846121319 7016.512754
11:00 PM 28.5 38.5 3.846121319 7016.512754
Sum 73673.38391
Sum/24 3069.72433
Log10(Sum/24) 3.487099376
10*Log10(Sum/24) 34.87099376
24 Hour Ldn 35
Loading/Unloading Noise Calculation
Receptor: Noise Level Calculation Prior to Implementation of Noise Attenuation Requirements No. Equipment Description Lmax Lmax Leq
1 Loading/Unloading Noise Calculation 70 2 25 1280 1 3 38.8 21.7 149.3654351 2 Loading/Unloading Noise Calculation 70 2 25 1300 1 6 35.7 18.5 71.45785251 3 Loading/Unloading Noise Calculation 70 2 25 1320 1 6 35.6 18.3 68.25873315 4 Loading/Unloading Noise Calculation 70 2 25 1340 1 6 35.4 18.1 65.24776234 5 Loading/Unloading Noise Calculation 70 2 25 1360 1 6 35.3 18.0 62.41130911 6 Loading/Unloading Noise Calculation 70 2 25 1380 1 6 35.2 17.8 59.73691054 7 8
9 10
Notes: Lmax[4] 39 Leq 27
[1] Percentage of time activity occurs each hour
[2] Soft ground terrain between project site and receptor. [3] Shielding due to terrain or structures
[4] Calculated Lmax is the Loudest value.

Ldn Calculations
Time Hourly Leq Leq' 0.1*Leq antiLog
Night 12:00 AM 26.8 36.8 3.678042856 4764.780028
1:00 AM 26.8 36.8 3.678042856 4764.780028
2:00 AM 26.8 36.8 3.678042856 4764.780028
3:00 AM 26.8 36.8 3.678042856 4764.780028
4:00 AM 26.8 36.8 3.678042856 4764.780028
5:00 AM 26.8 36.8 3.678042856 4764.780028
6:00 AM 26.8 36.8 3.678042856 4764.780028
Day 7:00 AM 26.8 26.8 2.678042856 476.4780028
8:00 AM 26.8 26.8 2.678042856 476.4780028
9:00 AM 26.8 26.8 2.678042856 476.4780028
10:00 AM 26.8 26.8 2.678042856 476.4780028
11:00 AM 26.8 26.8 2.678042856 476.4780028
12:00 PM 26.8 26.8 2.678042856 476.4780028
1:00 PM 26.8 26.8 2.678042856 476.4780028
2:00 PM 26.8 26.8 2.678042856 476.4780028
3:00 PM 26.8 26.8 2.678042856 476.4780028
4:00 PM 26.8 26.8 2.678042856 476.4780028
5:00 PM 26.8 26.8 2.678042856 476.4780028
6:00 PM 26.8 26.8 2.678042856 476.4780028
7:00 PM 26.8 26.8 2.678042856 476.4780028
8:00 PM 26.8 26.8 2.678042856 476.4780028
9:00 PM 26.8 26.8 2.678042856 476.4780028
Night 10:00 PM 26.8 36.8 3.678042856 4764.780028
11:00 PM 26.8 36.8 3.678042856 4764.780028
Sum 50030.19029
Sum/24 2084.591262
Log10(Sum/24) 3.319020913
10*Log10(Sum/24) 33.19020913
24 Hour Ldn 33
Ground
Effect[2]
Shielding
(dBA)[3]
Calculated (dBA)
Energy
Receiving school facility
Reference
(dBA) 50 ft
Quantity
Usage
factor[1]
Distance to
Receptor
Receiving school facility
Shielding
(dBA)[3]
Calculated (dBA)
Energy
Reference
(dBA) 50 ft
Quantity
Usage
factor[1]
Distance to
Receptor
Ground
Effect[2]
2634
City of American Canyon—SDG Commerce 220 Distribution Center Project Draft EIR
FirstCarbon Solutions
Appendix I:

Transportation Supporting Information
2635

THIS PAGE INTENTIONALLY LEFT BLANK
2636
RESOLUTION NO. 2023- 72

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF AMERICAN CANYON, CALIFORNIA

APPROVING A CITYWIDE POLICY ESTABLISHING VEHICLE MILES TRAVELED ( VMT) AS THE

STANDARD OF MEASUREMENT FOR POTENTIAL VEHICLE TRAFFIC IMPACTS CONSISTENT WITH

THE CALIFORNIA ENVIRONMENTAL QUALITY ACT (CEQA)
WHEREAS, the California Environmental Quality Act ( CEQA) was enacted by the State of California in 1970 to ensure the long- term protection of the environment and requires public agencies to analyze and disclose the effects of their actions on the environment; and
WHEREAS, in spite of more than 50 years of CEQA regulation, climate change caused in part by policies that favor the single occupant automobile represents a growing danger to human health, safety, economic prosperity, basic services, and natural resources; and
WHEREAS, the State of California as a whole, and Napa County residents, the economy, and environment have experienced adverse effects associated with climate change, such as a prolonged wildfire seasons and firestorms, rising temperatures, mudslides, severe droughts, property destruction and damage to infrastructure; and
WHEREAS, American Canyon has a long history of supporting policies to protect the environment. In 2013, American Canyon' sEnergy Efficiency Climate Action Plan ( EECAP) was the first Climate Action Plan adopted in Napa County; and
WHEREAS, on June 18, 2019, the City Council approved a Countywide Commitment to Address Climate Change Proclamation declaring the City' s support of local actions to address climate change including joining the Napa Countywide Climate Action Committee ( CAC); and WHEREAS, in July 2019, the City approved the Broadway District Specific Plan, which furthers the intent of SB743 by promoting integrated land uses that facilitate transportation through many forms, such as bicycle, walking, transit, and carpooling; and
WHEREAS, on November 16, 2021, the City Council approved a Climate Emergency Proclamation; and WHEREAS, on February 1, 2022, the City Council approved a Climate Emergency Resolution; and WHEREAS, public agencies in California have historically attempted to combat traffic congestion by relying on a metric known as " Level of Service" ( LOS) standards. Developed in the post- war US specifically for highway travel, the LOS standard assesses the relationship between traffic speed, volume and density, putting a priority on how well automobiles flow through a street network; and WHEREAS, the LOS standard fails to combat congestion in the long run because it considers all vehicles equally: a single person in a car counts as much as 50 people in a bus, even though 50 people in a single vehicle contribute far less to congestion than 50 people in 50 vehicles. The convenience of a short term free -flowing roadway only encourages more single occupant automobiles. Thus, measuring only the vehicles on a crowded roadway misses the fact that some of those vehicles are causing a real problem; and 2637
WHEREAS, policies, such as LOS that prioritize use of the single occupant automobile result in expensive road improvements and encourage urban sprawl to the detriment of other mobility alternatives, such as walking, biking, and transit; and
WHEREAS, according to the California Air Resources Board ( CARB), emphasis on prioritizing single - occupant automobile convenience has resulted in transportation as the leading source of GHG pollution in California of which passenger vehicles represent the largest single source of transportation GHG emissions in California; and
WHEREAS, in 2013, the State of California Legislature passed, and Governor Brown signed Senate Bill ( SB) 743 (Steinberg). SB 743 helps reduce greenhouse gas ( GHG) emissions overall by promoting integrated land uses that facilitate transportation through many forms, such as bicycle, walking, transit, and carpooling; and
WHEREAS, in furtherance of its intent, Senate Bill 743 directs OPR to produce CEQA guidance for cities to reduce automobile travel by replacing LOS from transportation analysis under CEQA with Vehicle Miles Traveled (" VMT"), or another measure that " promote( s) greenhouse gas emissions reduction, development of multimodal transportation networks, and a diversity of land uses"; and WHEREAS, the California Office of Planning and Research ( OPR) develops CEQA Guidelines to interpret CEQA statutes and published court decisions, including several appendices to the CEQA Guidelines that contain forms and guidance for lead agencies when performing environmental review; and WHEREAS, public agencies are encouraged to develop standards and procedures to implement CEQA Guidelines, such as replacing LOS from transportation analysis under CEQA with VMT by adopting local CEQA thresholds of significance; and
WHEREAS, California cities, as of July 1, 2020, began implementing the new law on applicable projects.; and
WHEREAS, State law allows lead agencies to set VMT thresholds of significance based either on local or regional per capita averages; and
WHEREAS, effective October 1, 2018, the California Air Resources Board ( CARB) target for the nine -county San Francisco Bay Area region is a 19 percent reduction in per capita greenhouse gas emissions from passenger vehicles by 2035, when compared to 2005; and
WHEREAS, when a public agency develops a local threshold of significance, CEQA Guidelines require the threshold of significance be adopted through a public review process and supported by substantial evidence; and
WHEREAS, establishing a VMT standard will further accomplish SB 743 by measuring mobility at a " holistic" level, such as the amount and distance people drive, taking the number of passengers within a vehicle into account; and
WHEREAS, General Plan Goal 1U directs the City to " Conduct decisive near -term action to reduce greenhouse gas emissions in American Canyon"; and
2638
WHEREAS, General Plan Policy 1. 37. 4directs the City to " Reduce vehicle miles travelled by encouraging future land uses that feature a compact mixed -use urban form connected with pedestrian and bicycle trails"; and
WHEREAS, adopting a VMT policy will fulfill General Plan goals and policies to reduce GHG emissions and bring the City of American Canyon' stransportation analysis methodology in line with State and City goals pursuant to Senate Bill 743 and the General Plan; and
WHEREAS, CEQA Guidelines Section 15064. 7(b) directs the City to adopt thresholds of significance based on substantial evidence by ordinance, resolution, rule or regulation through a public process; and WHEREAS, on behalf of the City, GHD prepared a Technical Memorandum that provides supporting documentation for appropriate VMT Thresholds in the City of American Canyon; and WHEREAS, the GHD Technical Memorandum would establish the City follow the framework suggested by the Governor' sOffice of Planning and Research ( OPR) in its Technical Advisory on Evaluating Transportation Impacts in CEQA; and
WHEREAS, the City' s Traffic Model, as prepared by GHD, calculates the existing rate of residential VMT per capita is estimated to be 16. 6 miles and the existing daily rate of VMT per employee is estimated to be 34. 1 miles; and
WHEREAS, on August 24, 2023, the City of American Canyon Planning Commission unanimously recommended approval of the VMT policy; and
WHEREAS, on September 5, 2023, the City Council considered the VMT policy, at which time all those in attendance were given the opportunity to speak on this proposal, and all comments were reviewed and considered.

NOW, THEREFORE, BE IT RESOLVED that the City Council of the City of American Canyon accepts the Technical Memorandum prepared by GHD that provides supporting documentation for appropriate VMT Thresholds in the City of American Canyon. A copy of the Technical Memorandum is incorporated into this Resolution as Exhibit A.

NOW, THEREFORE, BE IT FURTHER RESOLVED that the City Council of the City of American Canyon approves a Senate Bill ( SB) 743 California Environmental Quality Act (CEQA) VMT Policy as follows:

SECTION 1: CEQA FINDINGS
The VMT Policy is exempt from review under the California Environmental Quality Act (" CEQA") pursuant to Public Resources Code Section 21065 ( definition of a CEQA " project"), CEQA Guidelines Section 15064. 7 requirements for adopting thresholds of significance), and CEQA Guidelines Section 15061( b)( 3) commonsense exemption), CEQA Guidelines Section 15307 Actions by Regulatory Agencies for Protection of Natural Resources, and CEQA Guidelines Section 15308 Actions by Regulatory Agencies for Protection of the Environment. CEQA Guidelines Section 15307 and 15308 are applicable because the proposed VMT Policy will fulfill the City' s implementation of SB 743 which is intended to address climate change impacts that pose an immediate and growing threat to California' seconomy, environment, and public health. 2639
SECTION 2: BASELINE VEHICLE MILES TRAVELLED ( VMT)
The VMT for the General Plan, long- range plans, discretionary development applications, and transportation projects shall be evaluated in relation to the City of American Canyon Average VMT which is 16. 6 miles per resident and 34. 1 miles per employee.

SECTION 3. CEQA VMT THRESHOLDS
The VMT threshold of significance shall be 19% below the Citywide average. Unless exempt as described in this Resolution, this VMT threshold standard shall apply to all General Plan amendments, long- range plans, discretionary development applications, and transportation projects.

SECTION 4. CEQA LAND USE VMT SCREENING CRITERIA EXEMPTIONS The following screening criteria shall exempt General Plan, long- range plans, and discretionary development applications from a VMT analysis:

TYPE SCREENING CRITERIA
CEQA Exemption Any project exempt from CEQA.

Development Agreement Any project entitled under the terms of a Development Agreement currently in effect.

Program Environmental Impact Report
EIR)
Any project consistent with a Program EIR for which a VMT analysis has been conducted.

Near transit station Any Project located within .% mile of an existing major transit stop or an existing stop along a high -quality transit corridor CEQA Guidelines section 15064. 3(b)( 1)) ( OPR Technical Advisory)
Affordable Housing Housing affordable to residents earning up to 120% of the Napa County Area Median Income ( AMI) shall be presumed to have a less -than -significant impact. (OPR Technical Advisory) Local -Serving
Retail/ Service/ Recreational Land Use
A local - serving retail/ service or recreational project with a documented trade area up to 6 miles. (OPR Technical Advisory) Mixed -Use Projects Evaluate each mixed - use component independently and apply the significance threshold for each project type ( residential retail). An off -site trip reduction may be calculated using the Institute of Transportation Engineer' s (ITE' s) internal capture methodology. (OPR Technical Advisory)
2640
SECTION 5. CEQA LAND USE VMT SCREENING CRITERIA EXEMPTIONS The following screening criteria shall exempt City -initiated Transportation projects from a VMT analysis:

TYPE
Projects addressed at a programmatic level, such as in a Regional Transportation Plan EIR, whose impacts have been mitigated to less -than - significant. ( CEQA Guidelines Section 15064. 3(b)) Rehabilitation, maintenance, replacement, safety, and repair projects on existing transportation assets ( e.g., highways; roadways; bridges; culverts; Transportation Management System field elements such as cameras, message signs, detection, or signals; tunnels; transit systems; and assets that serve bicycle and pedestrian facilities) that do not add additional motor vehicle capacity.

Roadside safety devices or hardware installation such as median barriers and guardrails.

Auxiliary lane additions to improve roadway safety if less than one mile in length.

Traffic lane installation, removal, or reconfiguration not for through traffic, such as left, right, and Uturn pockets, two- way left turn lanes, or emergency breakdown lanes that are not utilized as through lanes.

Roadway capacity addition on local or collector streets when the project substantially improves pedestrian, cyclist, and, if applicable, transit conditions.

General- purpose lane ( including ramps) conversion to managed lanes or transit lanes, or changing lane management in a manner that would not substantially increase vehicle travel.

Addition of a new permanently restricted transit vehicle lane.

Reduction in number of through lanes.

Grade separation to separate vehicles from rail, transit, pedestrians or bicycles, or to replace a lane in order to separate preferential vehicles ( e.g., HOV, HOT, or trucks) from general vehicles.

Traffic control device installation, removal, or reconfiguration, including Transit Signal Priority TSP) features.

Traffic metering system installation, detection systems, cameras, changeable message signs and other electronics designed to optimize vehicle, bicycle, or pedestrian flow.

Signal timing to optimize vehicle, bicycle, or pedestrian flow.

Roundabout or traffic circle installation.

Traffic calming device installation or reconfiguration.

Adoption of or increase in tolls.

Addition of tolled lanes, where tolls are sufficient to mitigate VMT increase.

New transit service initiation.

Conversion of streets from one- way to two- way operation with no net increase in number of traffic lanes.

Off- street or on -street parking space removal or relocation.

On -street parking or loading restrictions ( including meters, time limits, accessible spaces, and preferential/ reserved parking permit programs) adoption or modification. 2641
TYPE
Traffic wayfinding signage.

Rehabilitation and maintenance projects that do not add motor vehicle capacity.

Addition of new or enhanced bike or pedestrian facilities on existing streets/ highways or within existing public rights -of -way.

Addition of Class I bike paths, trails, multi -use paths, or other off -road facilities that serve non - motorized travel.

Installation of publicly available alternative fuel/ charging infrastructure.

Addition of passing lanes, truck climbing lanes, or truck brake -check lanes in rural areas that do not increase overall vehicle capacity along the corridor.

SECTION 6. AMENDMENTS TO CEQA LAND USE VMT SCREENING CRITERIA EXEMPTIONS The VMT CEQA Screening Criteria exemptions listed in Section 4 and 5 of this Resolution are intended to identify most, but not all potential exemptions.

Interpretation for General Plan, Long- range Plans, and Discretionary Development Applications:

Interpretation of VMT exemptions for project types not specifically listed above shall be conducted by the Community Development Director or designee, consistent with the process codified in American Canyon Municipal Code Section 19. 01. 120 Interpretation.

Interpretation for City -Initiated Transportation Projects: Interpretation of VMT exemptions for project types not specifically listed above shall be conducted by the Public Works Director or designee consistent with the process codified in American Canyon Municipal Code Section 19. 01. 120 Interpretation.

Administrative Modification: Amendments to VMT Screening Criteria exemptions by State Law, including but not limited to the California Environmental Quality Act ( Public Resources Code §§ 21000 et seq.) shall be incorporated into the VMT Screening Exemption Resolution by reference.

SECTION 7. SEVERABILITY. If any section, sentence, clause or phrase of this Resolution is for any reason held to be invalid or unconstitutional by a decision of any court of competent jurisdiction, such decision shall not affect the validity of the remaining portions of this Resolution. The City Council declares that it would have passed this Resolution and adopted this Resolution and each section, sentence, clause or phrase thereof, irrespective of the fact that one or more sections, subsections, sentences, clauses or phrases be declared invalid or unconstitutional.
2642
PASSED, APPROVED and ADOPTED at a regularly scheduled meeting of the City Council of the City of American Canyon held on the 5th day of September, 2023, by the following vote:

AYES: Councilmembers Aboudamous, Joseph, Oro, Vice Mayor Washington, and Mayor Garcia NOES: None
ABSTAIN: None
ABSENT: None
Leon Garcia, Mayor
ATTEST:

Taresa Geilfuss, CMC, City clerk
APPROVED AS TO FORM:

William D. Ross, City Attorney

EXHIBITS
A. Technical Memorandum Supporting Documentation for VMT Thresholds Resolution 2643

EXHIBIT A
DRAFT Technical Memorandum
July 18, 2023
Brent Cooper, City of American Canyon bcooper@cityofamericancanyon. org Don Hubbard and Colin Burgett, GHD 11207243
American Canyon General Plan Update
Supporting Documentation for VMT Thresholds Resolution
To
From
Project Name
Subject

1. Introduction
Email
Project No.

SB 743 changed the way that transportation impacts are to be evaluated under CEQA. The key change was that vehicle delay, as measured using vehicular level -of -service ( LOS), is no longer considered an impact under CEQA. It has been replaced as a metric with vehicle - miles traveled ( VMT), with increases in VMT being considered a significant impact under CEQA.

The change in how transportation impacts are to be assessed has triggered a need for the City to develop thresholds of significance compatible with the new system. The consulting team has worked with City staff to develop these thresholds. The purpose of this memo is to document the key elements of the thresholds.

2. State Reduction Targets
SB 375 assigned the task of setting regional targets for greenhouse gas ( GHG) emission reductions from passenger vehicles to the California Air Resources Board ( CARB). These targets are based on extensive analysis by CARB on what actions are needed for different sectors ( transportation, energy generation, building energy use, etc.) for the state to reach its GHG reduction goals. GARB has set a target reduction
for GHGs from passenger vehicles in the MTC/ ABAG region at a 19% reduction by 2035'. Based on the substantial evidence provided by CARB, we can assume that if future developments in American Canyon generate 19% fewer VMT/ unit than the corresponding existing units, then those developments will have a less -than -significant VMT impact.

3. Analysis of VMT Impacts of Residential, Office and
Industrial Developments
The choice of which baseline to use for VMT evaluation is left to the lead agency. The VMT generated by new projects could, for example, be compared to the existing regional average, or the existing countywide average, or the existing local ( city- wide) average. In this case we recommend that new See: https:// ww2. arb. ca. gov/ our- work/ programs/ sustainable- communities- program/ regional- plan- targets 2644
developments in American Canyon be compared to existing developments in American Canyon. The recommendation to use a local average is based on the fact that the community character and physical characteristics of American Canyon are so different from the most populous parts of the MTC region ( San Jose, San Francisco, Oakland, etc.) that using a regional average dominated by the largest jurisdictions would not be an apples -to -apples comparison. Moreover, so long as each jurisdiction in the region makes a 19% reduction from its existing uses, the aggregate result for the region as a whole would meet the State' s goals. Regarding the development types being evaluated, we recommend that the City follow the framework suggested by the Governor' s Office of Planning and Research ( OPR) in its Technical Advisory on Evaluating Transportation Impacts in CEQA2:

Residential developments should be evaluated using VMT/ capita as the metric. This includes trips of all types where one end of the trip is the traveler' sresidence ( work commute trips, shopping trips, school trips, etc.).

Office and industrial developments should be evaluated using VMT/ employee as the metric. This VMT is for the employees' own trips to work, and does not include trips made by other people to the employee' s
worksite.

GHD utilized the American Canyon Travel Demand Model ( ACTDM), incorporating U. S. Census data relevant to work commute patterns, and regional trip length data relevant to VMT attributable to trips outside the model area, to estimate the average existing rates of residential VMT per Capita, and nonresidential VMT per Employee, and the associated thresholds:

Residential VMT (attributable to homes in American Canyon):

Residential
VMT
381, 468
Population
22, 959
Existing * 19% Threshold
VMT/ Capita reduction VMT/ Capita

16. 6 81% 13. 5
The residential VMT is the sum of the VMT attributable to all home -based trip productions to/ from dwelling units located in American Canyon, incorporating the distance for each trip from the distance matrix in the model. This includes VMT taking place outside the area of the model' straffic analysis zones. These outer areas are represented with external links representing the average distance trips to/ from American Canyon make in their respective directions.

Employment VMT (attributable to work trips to/ from jobs in American Canyon):

Employment
VMT
151, 96
Jobs
4,42
Existing * 19% Threshold
VMT/ Job reduction VMT/ job

34. 2 81% 27. 7
The employment VMT is the sum of all home -based work trips to and from places of employment in American Canyon. This includes VMT taking place outside the area of the model' straffic analysis zones trips to and from homes located in other jurisdictions outside of the City and model area). These outer areas are represented with external links representing the average distance trips from the outer areas to work sites in American Canyon.

4. Analysis of VMT Impacts of Retail & Hotel Developments Retail, hotel and service developments need to be handled somewhat differently for other types of nonresidential land uses, such as office or industrial buildings. This is because they attract trips from customers, patrons, or visitors in addition to commute trips made by their own employees. These two components of the traffic generated by retail and service uses need to be handled separately:

See: https:// opr. ca. gov/ dcs/ 20190122- 743 Technical Advisorv. pdf 2645
VMT attributable to retail, hotel and service employees should be evaluated in the same manner as for office or industrial uses. That is, the average automobile commute lengths should be compared to the target reduction from the city- wide average rate of VMT/ job.

VMT attributable to retail customers should be assessed based on the anticipated net change in total regional VMT attributable to customer trips to/ from the proposed development. OPR recommends that the impact of visitor/ customer trips for retail uses be assessed based on whether overall VMT for the region increases or decreases as a result of the development. For local -serving retail and service developments, a presumption may be made that visitor trips to these uses will be short trips that substitute for longer trips to a more distant store of a similar type. The International Council of Shopping Centers has developed a classification system for retail developments of various sorts3 and performed research into the trade area size of each ( see Table 1). Based on this information, we have determined that Community Centers, Neighborhood Centers, and Strip/ Convenience Centers are local -serving and can be presumed to have less -than -significant VMT impacts. Other types of retail developments would require quantitative assessment of their trade area to determine their VMT impacts.

VMT attributable to hotel guests should be assessed in a similar manner as retail customers, based on whether total VMT for the region would increase as a result of guest VMT attributable to the hotel development. Most hotels provide lodging for guests that, in the absence of a proposed new hotel, would simply stay at another hotel or lodging facility in the area. The assessment of VMT attributable to hotel guests should therefore be based on the net effect of the proposed hotel location, compared to the VMT that would be generated by those guests if they stayed at other lodging options in the area..

5. Analysis of VMT Impacts of Transportation Projects
Transportation projects serve trips but do not generate them the way that land development projects do.

They may, however, increase VMT by inducing more or longer vehicle trips than would have taken place if the project were not constructed. OPR recommends that the VMT impacts of a transportation project should be considered significant if the project results in a net increase in regional VMT. This can be determined using the City' straffic model. However, model analysis are not needed for certain types of projects that OPR has determined are not likely to lead to a measurable and substantial effect on VMT4.

These include:

Projects addressed at a programmatic level, such as in a Regional Transportation Plan EIR, whose impacts have been mitigated to less -than -significant. (CEQA Guidelines Section 15064. 3(b))
Rehabilitation, maintenance, replacement, safety, and repair projects on existing transportation assets ( e.g., highways; roadways; bridges; culverts; Transportation Management System field elements such as cameras, message signs, detection, or signals; tunnels; transit systems; and assets that serve bicycle and pedestrian facilities) that do not add additional motor vehicle capacity.

Roadside safety devices or hardware installation such as median barriers and guardrails.

Roadway shoulder enhancements to provide " breakdown space," dedicated space for use only by transit vehicles, to provide bicycle access, or to otherwise improve safety, but which will not be used as automobile vehicle travel lanes.
3 See: https:// www. icsc. com/ uploads/ research/ general/ US CENTER CLASSIFICATION. pdf See: https:// opr. ca. gov/ docs120190122- 743 Technical Advisorv. pdf 2646
Auxiliary lane additions to improve roadway safety if less than one mile in length.

Traffic lane installation, removal, or reconfiguration not for through traffic, such as left, right, and U- turn pockets, two- way left turn lanes, or emergency breakdown lanes that are not utilized as through lanes.

Roadway capacity addition on local or collector streets when the project substantially improves pedestrian, cyclist, and, if applicable, transit conditions.

General- purpose lane ( including ramps) conversion to managed lanes or transit lanes, or changing lane management in a manner that would not substantially increase vehicle travel.

Addition of a new permanently restricted transit vehicle lane.

Reduction in number of through lanes.

Grade separation to separate vehicles from rail, transit, pedestrians or bicycles, or to replace a lane in order to separate preferential vehicles ( e.g., HOV, HOT, or trucks) from general vehicles.

Traffic control device installation, removal, or reconfiguration, including Transit Signal Priority ( TSP) features.

Traffic metering system installation, detection systems, cameras, changeable message signs and other electronics designed to optimize vehicle, bicycle, or pedestrian flow.

Signal timing to optimize vehicle, bicycle, or pedestrian flow.

Roundabout or traffic circle installation.

Traffic calming device installation or reconfiguration.

Adoption of or increase in tolls.

Addition of tolled lanes, where tolls are sufficient to mitigate VMT increase.

New transit service initiation.

Conversion of streets from one- way to two- way operation with no net increase in number of traffic lanes.

Off- street or on -street parking space removal or relocation.

On -street parking or loading restrictions ( including meters, time limits, accessible spaces, and preferential/ reserved parking permit programs) adoption or modification.

Traffic wayfinding signage.

Rehabilitation and maintenance projects that do not add motor vehicle capacity.

Addition of new or enhanced bike or pedestrian facilities on existing streets/ highways or within existing public rights -of -way.

Addition of Class I bike paths, trails, multi -use paths, or other off -road facilities that serve non - motorized travel.

Installation of publicly available alternative fuel/ charging infrastructure.

Addition of passing lanes, truck climbing lanes, or truck brake -check lanes in rural areas that do not increase overall vehicle capacity along the corridor. 2647
Table 1: U. S. Shopping Center Classifications and Trade Area Size U. S. Shopping -Center
Type of Shopping Center Aggregate GLA
Center Conce . Count ( Sq. Ft)
Classification and Characteristics
Typical Typical
GLA Number
Range (sq. % Anchor of Trade Area
Ft. Acres If of Anchors GLA Tenants Typical Type of Anchors Size Share
of
Industry Average Size
GLA ( Sq. Ft.)
General - Purpose Centers 112, 50
Super - Regional Mall
Similar in concept to regional malls, but offering more variety and assortment.
620 778, 336, 548 10. 2%1, 255, 382 800, 00+ 60- 120 3. SO -70% NA Full -line or junior department
store, mass merchant, discount
department store and/ or fashion
apparel store.
5- 25 miles
Regional Mali
General merchandise or fashion - oriented offerings.

Typically, enclosed with inward - facing stores connected by a common walkway. Parking surrounds the outside
perimeter.
600 353, 795, 548 4.7% 589, 659
400, 00-
800, 00
40- 100 2+ 50- 70%
40- 80
stores
Full - line or junior department
store, mass merchant, discount
department store and/ or fashion
apparel store.
5- 15 miles
Community Center
Large
Neighborhood
Center")
General merchandise or convenience- oriented offerings.

Wider range of apparel and other soft goods offerings than neighborhood centers. The center is usually configured in a straight line as a strip, or may be laid out in an L or U shape, depending on the site and design.
9, 776 1, 930, 849, 736 25. 4%197, 509
125, 000.
400 000
10- 40 2+ 40- 60%
15- 40
stores
Discount store, supermarket, drug,
large - specialty discount ( toys,
books, electronics, home
improvement/ furnishings or
sporting goods, etc.)
3-6 miles
Neighborhood
Center
Convenience oriented. 32, 588 2, 340, 711, 371 30. 8%71, 827 30, 000-
125 000
3-5 1+ 30- 50%
5- 20
stores
Supermarket 3 miles
Strip/ Convenience
Attached row of stores or service outlets managed as a
coherent retail entity, with on -site parking usually located in front of the stores. Open canopies may connect the
store fronts, but a strip center does not have enclosed walkways linking the stores. A strip center may be
in a straight line, or have an " L" or " U" shape. A
convenience center is among the smallest of the centers, whose tenants provide a narrow mix of goods and personal services to a very limited trade area.

68. 936 911102, 922 12. 0%13, 218 30, 000 3
Anchor ers o• a
small
cconfigured
ornen en< r
store ancnor.

NA NA
Convenience store, such as a minimart.
1 mile
Specialized - Purpose Centers 3, 275
Power Center
Category - dominant anchors, including discount
department stores, off -price stores, wholesale clubs, with only a few small tenants.
2,58 990, 416. 667 13. 0%438, 626
250, 00
600, 00
25- 80 3+ 70. 90% NA
Category killers, such as home
improvement, discount
department, warehouse club and
off -price stores
5- 10 miles
Lifestyle
Upscale national - chain specialty stores with dining and entertainment in an outdoor setting.
491 164, 903, 247 2.% 335, 82
1' 000-
500, 00
10- 40 0- 2 0-50% NA Large format upscale specialty 8- 12 miles Factory Outlet
Manufacturers' and retailers' outlet stores selling brandname goods at a discount. 367 87, 368, 113 1.2% 238, 060
50, 000-
400 000
10- 50 NA NA NA
Manufacturers and retailers'
outlets
25- 75 miles
Theme/ Fstival
Leisure, tourist, retail and service -oriented offerings with entertaiment as a unifying theme. Often located in urban areas, they may be adapted from older --sometimes
historic --buildings and can be part of a mixed -use project. 159 23, 498, 769 0.3%147, 791
80, 000-
250, 00
5- 20 unspecified NA NA Restaurants, entertainment 25- 75 miles Limited - Purpose Pi operty 62
Airport Retail
Consolidation of retail stores located within a commercial airport
62 15, 452, 860 0.2% 249,40
75, 000-
300, 00

NA NA NA NA
No anchors; retail includes
specialty retail and restaurants
NA
Total Industry
Total lndustry Traditional + Specialty + Special Purpose 115, 87
115, 87 7S%, 535 781 100. 0%65, 568
Sources: ICSC Research and CoStar Realty Information, Inc ( www. costar. com) January 2017 2648
Attachment 1.11
Documents Incorporated by Reference in Draft EIR
As permitted by CEQA Guidelines Section 15150, this Draft EIR has referenced several technical studies, analyses, and previously certified environmental documentation. Information from the documents, which have been incorporated by reference, has been briefly summarized in the appropriate section(s). The relationship between the incorporated part of the referenced document and the Draft EIR has also been described. The documents and other sources that have been used in the preparation of this Draft EIR include but are not limited to:
• City of American Canyon General Plan
• American Canyon Municipal Code
• Napa County Airport Land Use Compatibility Plan
• City of American Canyon Urban Water Management Plan
In accordance with CEQA Guidelines Section 15150(b), the General Plan, the referenced documents and other sources used in the preparation of the Draft EIR are available for review at the American Canyon City Hall at the address shown below:

City of American Canyon City Hall
4381 Broadway Street, Suite 201
American Canyon, CA 94503
Hours: Monday–Friday: 8:00 a.m. to 5:00 p.m.

Saturday–Sunday: Closed
Active Adults Center
2185 Elliot Drive
American Canyon, CA 94503
Hours: Monday - Friday 9:00 a.m. to 2:00 p.m.

Saturday–Sunday: Closed
American Canyon Library
300 Crawford Way
American Canyon, CA 94503
Hours: Monday, Tuesday, and Thursday–
Saturday: 10:00 a.m. to 6:00 p.m.

Wednesday: 12:00 p.m. to 8:00 p.m.

Sunday: Closed
2649
FINAL
Environmental Impact Report
SDG Commerce 220 Distribution Center Project
City of American Canyon, Napa County, California
State Clearinghouse Number 2023100842
Prepared for:

City of American Canyon
4381 Broadway Street, Suite 201
American Canyon, CA 94503
707.647.4337
Contact: William He, Senior Planner
Prepared by:

FirstCarbon Solutions
2999 Oak Road, Suite 250
Walnut Creek, CA 94597
925.357.2562
Contact: Mary Bean, Project Director
Janna Waligorski, Project Manager
Date: October 4, 2024
SDG Commerce 220 EIR and CUP -
Attachment 1.12 - Exhibit C: Final EIR
2650

THIS PAGE INTENTIONALLY LEFT BLANK
2651
City of American Canyon—SDG Commerce 220 Distribution Center Project Final EIR Table of Contents
FirstCarbon Solutions iii
https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/5639/56390001/EIR/3 - Final EIR/56390001 Sec00-01 TOC.docx Table of Contents
Section 1: Introduction.............................................................................................................. 1-1 Section 2: Responses to Written Comments............................................................................... 2-1

2.1 - List of Authors ................................................................................................................ 2-1

2.2 - Responses to Comments................................................................................................ 2-1 Section 3: Errata........................................................................................................................ 3-1

3.1 - Changes in Response to Specific Comments.................................................................. 3-1 Appendix A – Swainson Hawk Mitigation Support
2652

THIS PAGE INTENTIONALLY LEFT BLANK
2653
City of American Canyon—SDG Commerce 220 Distribution Center Project Final EIR Introduction
FirstCarbon Solutions 1-1
https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/5639/56390001/EIR/3 - Final EIR/56390001 Sec01-00 Introduction.docx SECTION 1: INTRODUCTION
In accordance with California Environmental Quality Act (CEQA) Guidelines Section 15088, the City of American Canyon (Lead Agency) has evaluated the comments received on the SDG Commerce 220 Distribution Center Project Draft Environmental Impact Report (Draft EIR). Pursuant to CEQA Guidelines Section 15132, this Final EIR includes a list of persons, organizations, and agencies that provided comments on the Draft EIR; responses to the comments received regarding the Draft EIR; and errata, or revisions to the Draft EIR; as well as a Mitigation Monitoring and Reporting Program (MMRP) for use by the City of American Canyon during its review.

This document is organized into three sections:
• Section 1—Introduction. Provides an introduction to the Final EIR. • Section 2—Responses to Written Comments. Provides a list of the agencies, organizations, and individuals who commented on the Draft EIR. Copies of all of the letters received regarding the Draft EIR and responses thereto are included in this section. • Section 3—Errata. Includes an addendum listing refinements and clarifications on the Draft EIR, which have been incorporated.

The Final EIR includes the following contents:
• Draft EIR (provided under separate cover)
• Draft EIR Appendices (provided under separate cover)
• Responses to Written Comments on the Draft EIR and Errata (Section 2 and Section 3 of this document)
• Mitigation Monitoring and Reporting Program (provided under separate cover) 2654

THIS PAGE INTENTIONALLY LEFT BLANK
2655
City of American Canyon—SDG Commerce 220 Distribution Center Project Final EIR Responses to Written Comments
FirstCarbon Solutions 2-1 https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/5639/56390001/EIR/3 - Final EIR/56390001 Sec02-00 Responses to Written Comments.docx SECTION 2: RESPONSES TO WRITTEN COMMENTS

2.1 - List of Authors
A list of public agencies, organizations, and individuals that provided comments on the SDG Commerce 220 Distribution Center Project Draft Environmental Impact Report (Draft EIR) is presented below. Each comment has been assigned a code. Individual comments within each communication have been numbered so comments can be crossed-referenced with responses. Following this list, the text of the communication is reprinted and followed by the corresponding response.

Author Author Code
State Agencies
California Department of Fish and Wildlife .................................................................................... CDFW California Department of Transportation.................................................................................CALTRANS Organizations
El Puente Comunitario........................................................................................................................ EPC Napa/Solano Residents for Responsible Development................................................................. NSRRD Soil Water Air Protection Enterprise.......................................................................................SWAPE Shawn Smallwood........................................................................................................ SMALLWOOD Wilson Ihrig ............................................................................................................................... IHRIG Individuals
Yvonne Baginski (First Letter) ................................................................................................. BAGINSKI 1 Yvonne Baginski (Second Letter) ............................................................................................BAGINSKI 2 Jeannette Goyetche.................................................................................................................GOYETCHE

2.2 - Responses to Comments

2.2.1 - Introduction
In accordance with the California Environmental Quality Act (CEQA) Guidelines Section 15088, the City of American Canyon (City), as the Lead Agency, evaluated the comments received on the Draft EIR (State Clearinghouse No. 2023100842) for the SDG Commerce 220 Distribution Center Project and has prepared the following responses to the comments received. This Response to Comments document becomes part of the Final EIR for the proposed project in accordance with CEQA Guidelines Section 15132.

2.2.2 - Comment Letters and Responses
The comment letters reproduced in the following pages follow the same organization as used in the List of Authors.
2656

THIS PAGE INTENTIONALLY LEFT BLANK
2657
2 2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
City of American Canyon—SDG Commerce 220 Distribution Center Project Final EIR Responses to Written Comments
FirstCarbon Solutions 2-13 https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/5639/56390001/EIR/3 - Final EIR/56390001 Sec02-00 Responses to Written Comments.docx State Agencies
California Department of Fish and Wildlife (CDFW)
Response to CDFW-1
The commenter provides introductory statements saying that the agency has received the EIR and is submitting comments concerning it. The commenter also claims that project equipment staging and earthmoving were visible in recent aerial imagery and requests the City to investigate any unauthorized construction activities.

The recent grading on-site was completed as part of the construction of the adjacent SDG Commerce 217 Distribution Center Project (PL20-0008) and completed under a grading permit issued by the City of American Canyon. In accordance with CEQA, the grading was considered in the Initial Study prepared for the SDG Commerce 217 Project (Final Initial Study dated February 2012) and mitigation measures were implemented as applicable.

Response to CDFW-2
The commenter clarifies its role as a Trustee Agency/Responsible Agency regarding “take,” unlisted species, and nesting birds and provides a related summary.

No environmental issues are raised, and no response is required.

Response to CDFW-3
The commenter provides background information on the proposed project and the regulatory requirements, such as the California Endangered Species Act (CESA) and raptors and other nesting birds.

No environmental issues are raised, and no response is required.

Response to CDFW-4
Comments were provided on the Draft EIR’s mitigation measures regarding Swainson’s hawk. The commenter states that the EIR did not adequately mitigate potential impacts to Swainson’s hawk due to an insufficient buffer distance for occupied nests and unincorporated unprocessed California Natural Diversity Database (CNDDB) data of Swainson’s hawk occurrences from 2023 and 2024.

Concerning the argument for an insufficient buffer distance for occupied nests, according to Jim Estep, an recognized expert on Swainson’s hawk, a 0.5-mile buffer is not supported by any datadriven rationale (See Appendix A). Estep argues that this distance was selected to maximally ensure that nesting behavior/success would not be influenced and is therefore a highly conservative buffer distance. Now, 30 years after these guidelines were created, much more is known of Swainson’s hawk, including their high degree of tolerance to noise and disturbances. Although no studies have been conducted to understand the most effective buffer distance, it is understood that a 0.5-mile buffer is unnecessarily large. Many successful nests have been documented in very close proximity to a multitude of disturbances with nest abandonment involving the direct impact to nest trees or disturbances next to active nests. Swainson’s Hawk Technical Advisory Committee guidelines identify a 600-foot buffer based on the work of Mike Bradbury, a former California Department of Water Resources (DWR) employee. Through monitoring of nesting activity in the Sacramento-San Joaquin 2668
City of American Canyon—SDG Commerce 220 Distribution Center Project Responses to Written Comments Final EIR
2-14 FirstCarbon Solutions https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/5639/56390001/EIR/3 - Final EIR/56390001 Sec02-00 Responses to Written Comments.docx Delta, Bradbury determined that a 600-foot buffer was a reasonable distance in most cases.

Ultimately Estep argues that this species is quite tolerant of disturbance events and a 0.5-mile buffer is not necessary in most cases. He supports a 600-foot buffer with the caveat that specific site conditions should be taken into consideration.1 As lead agency, the City has discretion to choose among differing expert opinions. (CEQA Guidelines § 15151).

Therefore, FirstCarbon Solutions (FCS) and the City agree that a 600-foot buffer is sufficient.

Regarding unincorporated unprocessed CNDDB data, both occurrences are recorded over 1.5 miles from the project site, significantly outside of both the 600-foot and 0.5-mile buffer zones.

Additionally, these occurrences were not confirmed nest but potentially nesting Swainson’s hawk sightings. The nearest confirmed nest occurrence was recorded 1.9 mile from the site in 2021.

Although these sightings do indicate that Swainson’s hawk may forage within the project site, Mitigation Measure (MM) BIO-1a and MM BIO-1b would sufficiently mitigate for any Swainson’s hawk found within 600 feet of the project site.

Response to CDFW-5
The commenter states that the Draft EIR does not adequately mitigate potential impacts to Swainson’s hawk because it includes an insufficient buffer distance for occupied Swainson’s hawk nests, and the commenter recommends specific edits to MM BIO-1b (Swainson’s Hawk Avoidance and Minimization and Construction Monitoring) in the form of an extended proposed buffer distance of 0.5 mile.

Please see Response to CDFW-4. No further response is required.

Response to CDFW-6
The commenter states that the Draft EIR does not adequately mitigate potential impacts to Swainson’s hawk foraging habitat.

FCS refutes the assumption that development of the project site would significantly impact Swainson’s hawk foraging habitat. The project site constitutes 10.17 acres of disturbed land. East of the project site, there are thousands of acres of foraging habitat as seen via aerial satellite imagery.

Additionally, the development of the site, is surrounded to the north and south by industrial development and has been anthropogenically disturbed recently, would not eliminate a significant area of foraging habitat for this species.

Response to CDFW-7
The commenter states that if an active Swainson’s hawk nest is disturbed by the proposed project or its foraging habitat is removed, the proposed project may result in a substantial reduction in the number or restriction in the range of a threatened species, which is a Mandatory Finding of Significance, and since other large projects have not been required to mitigate foraging habitat, this may lead to a significant cumulative impact to Swainson’s hawk.

FCS agrees that the disturbance of an active Swainson’s hawk nest and removal of foraging habitat would result in a Mandatory Finding of Significance if such disturbance and removal were to occur. 1 Estep, J. Estep Environmental Consulting. Received by Janna Waligorski. August 22, 2024. 2669
City of American Canyon—SDG Commerce 220 Distribution Center Project Final EIR Responses to Written Comments
FirstCarbon Solutions 2-15 https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/5639/56390001/EIR/3 - Final EIR/56390001 Sec02-00 Responses to Written Comments.docx However, FCS has implemented MM BIO-1a and MM BIO-1b to survey for Swainson’s hawk nests within 600 feet of the project site to prevent such disturbances from occurring. Therefore, the project would not contribute to any cumulatively significant impact. Additionally, see Response to CDFW-6 for justification as to why development of the proposed project would not significantly impact Swainson’s hawk foraging habitat.

Response to CDFW-8
The commenter offers suggested mitigations to reduce potential impacts to Swainson’s hawk to less than significant. They recommend incorporating an increased survey distance of 0.5-mile radius in Swainson’s hawk surveys, implementing an avoidance buffer distance of 0.5 mile if nests are detected, and mitigating for foraging habitat at a 1:1 ratio.

Please see Response to CDFW-4 for a response to increased Swainson’s hawk survey and buffer distances, and please see Response to CDFW-6 for Swainson’s hawk foraging habitat.

Response to CDFW-9
The commenter states that CEQA requires that information developed in environmental impact reports and negative declarations be incorporated into a database which may be used to make subsequent or supplemental environmental determinations and requests that the City report any special-status species and natural communities detected during project surveys to the CNDDB.

The proposed project would adhere to any and all reporting requirements under CEQA, including those related to the detection of any special-status species and natural communities.

Response to CDFW-10
The commenter notes that because the proposed project would have an impact on fish and/or wildlife, it would be required to pay the necessary filing fees due to the CDFW and then explains the timing requirements and legal implications of filing these fees. The commenter also provides conclusionary remarks.

The proposed project would be required to pay all applicable fees necessary under the law.

Response to CDFW-11
The commenter lays out three proposed mitigation measures for Swainson’s hawk, including Swainson’s Hawk Survey, Swainson’s Hawk Nest Avoidance Buffer, and Swainson’s Hawk Foraging Habitat Mitigation, consistent with comments previously provided.

These proposed mitigation measures are noted. Please see Response to CDFW-4 for a response to increased Swainson’s hawk survey and buffer distances, and please see Response to CDFW-6 for Swainson’s hawk foraging habitat.
2670

THIS PAGE INTENTIONALLY LEFT BLANK
2671
“Provide a safe and reliable transportation network that serves all people and respects the environment.” DISTRICT 4

OFFICE OF REGIONAL AND COMMUNITY PLANNING
P.O. BOX 23660, MS–10D | OAKLAND, CA 94623-0660
www.dot.ca.gov
August 1, 2024 SCH #: 2023100842
GTS #: 04-NAP-2023-00364
GTS ID: 31389
Co/Rt/Pm: NAP/29/2.9
William He, Senior Planner
City of American Canyon
4381 Broadway Street, Suite 201
American Canyon, CA 94503
Re: SDG Commerce 220 Distribution Center Project Draft Environmental Impact Report (DEIR)
Dear William He:

Thank you for including the California Department of Transportation (Caltrans) in the environmental review process for the SDG Commerce 220 Distribution Center Project.

The Local Development Review (LDR) Program reviews land use projects and plans to ensure consistency with our mission and state planning priorities. The following comments are based on our review of the June 2024 DEIR.

Please note this correspondence does not indicate an official position by Caltrans on this project and is for informational purposes only.

Project Understanding
The project proposes to develop a 219,834-square-foot wine storage and distribution center on the 443,005-square-foot project site. The warehouse would provide 23 truck doors and up to 4,400 square feet of office space.

Travel Demand Analysis
The project vehicle miles traveled (VMT) analysis and significance determination are undertaken in a manner consistent with the City’s adopted VMT policy. Per the DEIR, this project is found to have significant and unavoidable VMT impacts. Caltrans commends the City of American Canyon for requiring the development of a Transportation Demand Management (TDM) program to reduce employee VMT. The proposed measures identified in the TDM plan should be documented with annual monitoring reports to demonstrate effectiveness.

CALTRANS

Page 1 of 2 ends

American Canyon City CouncilNovember 19, 2024

American Canyon City Council
November 19, 2024