Attachment 9v - Draft EIR Appendix J - Drainage Study and WQMP — Riverside City Council, January 25, 2022

1 February 2020

GENERAL USE LEVEL DESIGNATION FOR BASIC (TSS), ENHANCED,

PHOSPHORUS & OIL TREATMENT

For

CONTECH Engineered Solutions Filterra®

Ecology’s Decision:

Based on Contech’s submissions, including the Final Technical Evaluation Reports, dated August 2019, March 2014, December 2009, and additional information provided to Ecology dated October 9, 2009, Ecology hereby issues the following use level designations:

1. A General Use Level Designation for Basic, Enhanced, Phosphorus, and Oil Treatment for the Filterra® system constructed with a minimum media thickness of 21 inches (1.75 feet), at the following water quality design hydraulic loading rates:

Treatment Infiltration Rate (in/hr) for
use in Sizing
Basic 175
Phosphorus 100
Oil 50
Enhanced 175

2. The Filterra is not appropriate for oil spill-control purposes.

3. Ecology approves Filterra systems for treatment at the hydraulic loading rates listed above, and sized based on the water quality design flow rate for an off-line system. Calculate the water quality design flow rates using the following procedures:
 Western Washington: for treatment installed upstream of detention or retention, the water quality design flow rate is the peak 15-minute flow rate as calculated using the latest version of the Western Washington Hydrology Model or other Ecology-approved continuous runoff model.
 Eastern Washington: For treatment installed upstream of detention or retention, the water quality design flow rate is the peak 15-minute flow rate as calculated using one of the three flow rate based methods described in Chapter 2.2.5 of the Stormwater Management Manual for Eastern Washington (SWMMEW) or local manual.  Entire State: For treatment installed downstream of detention, the water quality design flow rate is the full 2-year release rate of the detention facility.

2 4. This General Use Level Designation has no expiration date, but Ecology may revoke or amend the designation, and is subject to the conditions specified below.

Ecology’s Conditions of Use:

Filterra systems shall comply with these conditions shall comply with the following conditions:

1. Design, assemble, install, operate, and maintain the Filterra systems in accordance with applicable Contech Filterra manuals and this Ecology Decision.

2. The minimum size filter surface-area for use in Washington is determined by using the design water quality flow rate (as determined in this Ecology Decision, Item 3, above) and the Infiltration Rate from the table above (use the lowest applicable Infiltration Rate depending on the level of treatment required). Calculate the required area by dividing the water quality design flow rate (cu-ft/sec) by the Infiltration Rate (converted to ft/sec) to obtain required surface area (sq-ft) of the Filterra unit.

3. Each site plan must undergo Contech Filterra review before Ecology can approve the unit for site installation. This will ensure that design parameters including site grading and slope are appropriate for use of a Filterra unit.

4. Filterra media shall conform to the specifications submitted to and approved by Ecology and shall be sourced from Contech Engineered Solutions, LLC with no substitutions.

5. Maintenance includes removing trash, degraded mulch, and accumulated debris from the filter surface and replacing the mulch layer. Use inspections to determine the site-specific maintenance schedules and requirements. Follow maintenance procedures given in the most recent version of the Filterra Operation and Maintenance Manual.

6. Maintenance: The required maintenance interval for stormwater treatment devices is often dependent upon the degree of pollutant loading from a particular drainage basin. Therefore, Ecology does not endorse or recommend a “one size fits all” maintenance cycle for a particular model/size of manufactured treatment device.  Contech designs Filterra systems for a target maintenance interval of 6 months in the Pacific Northwest. Maintenance includes removing and replacing the mulch layer above the media along with accumulated sediment, trash, and captured organic materials therein, evaluating plant health, and pruning the plant if deemed necessary.  Conduct maintenance following manufacturer’s guidelines.

7. Filterra systems come in standard sizes.

8. Install the Filterra in such a manner that flows exceeding the maximum Filterra operating rate are conveyed around the Filterra mulch and media and will not resuspend captured sediment.

9. Discharges from the Filterra units shall not cause or contribute to water quality standards violations in receiving waters.

3 Approved Alternate Configurations
Filterra Internal Bypass - Pipe (FTIB-P)

1. The Filterra® Internal Bypass – Pipe allows for piped-in flow from area drains, grated inlets, trench drains, and/or roof drains. Design capture flows and peak flows enter the structure through an internal slotted pipe. Filterra® inverted the slotted pipe to allow design flows to drop through to a series of splash plates that then disperse the design flows over the top surface of the Filterra® planter area. Higher flows continue to bypass the slotted pipe and convey out the structure.

2. To select a FTIB-P unit, the designer must determine the size of the standard unit using the sizing guidance described above.

Filterra Internal Bypass – Curb (FTIB-C)

1. The Filterra® Internal Bypass –Curb model (FTIB-C) incorporates a curb inlet, biofiltration treatment chamber, and internal high flow bypass in one single structure. Filterra® designed the FTIB-C model for use in a “Sag” or “Sump” condition and will accept flows from both directions along a gutter line. An internal flume tray weir component directs treatment flows entering the unit through the curb inlet to the biofiltration treatment chamber. Flows in excess of the water quality treatment flow rise above the flume tray weir and discharge through a standpipe orifice; providing bypass of untreated peak flows. Americast manufactures the FTIB-C model in a variety of sizes and configurations and you may use the unit on a continuous grade when a single structure providing both treatment and high flow bypass is preferred. The FTIB-C model can also incorporate a separate junction box chamber to allow larger diameter discharge pipe connections to the structure.

2. To select a FTIB-C unit, the designer must determine the size of the standard unit using the sizing guidance described above.

Filterra® Shallow

1. The Filterra Shallow provides additional flexibility for design engineers and designers in situations where various elevation constraints prevent application of a standard Filterra configuration. Engineers can design this system up to six inches shallower than any of the previous Filterra unit configurations noted above.

2. Ecology requires that the Filterra Shallow provide a media contact time equivalent to that of the standard unit. This means that with a smaller depth of media, the surface area must increase.

3. To select a Filterra Shallow System unit, the designer must first identify the size of the standard unit using the modeling guidance described above.

4. Once the size of the standard Filterra unit is established using the sizing technique described above, use information from the following table to select the appropriate size Filterra Shallow System unit.

4 Shallow Unit Basic, Enhanced, and Oil Treatment Sizing Standard Depth Equivalent Shallow Depth
4x4 4x6 or 6x4
4x6 or 6x4 6x6
4x8 or 8x4 6x8 or 8x6
6x6 6x10 or 10x6
6x8 or 8x6 6x12 or 12x6
6x10 or 10x6 13x7
Notes:

1. Shallow Depth Boxes are less than the standard depth of 3.5 feet but no less than 3.0 feet deep (TC to INV).

Applicant: Contech Engineered Solutions, LLC.

Applicant’s Address: 11815 NE Glenn Widing Drive
Portland, OR 97220

Application Documents:

 State of Washington Department of Ecology Application for Conditional Use Designation, Americast (September 2006)
 Quality Assurance Project Plan Filterra® Bioretention Filtration System Performance Monitoring, Americast (April 2008)
 Quality Assurance Project Plan Addendum Filterra® Bioretention Filtration System Performance Monitoring, Americast (June 2008)
 Draft Technical Evaluation Report Filterra® Bioretention Filtration System Performance Monitoring, Americast (August 2009)
 Final Technical Evaluation Report Filterra® Bioretention Filtration System Performance Monitoring, Americast (December 2009)
 Technical Evaluation Report Appendices Filterra® Bioretention Filtration System Performance Monitoring, Americast, (August 2009)
 Memorandum to Department of Ecology Dated October 9, 2009 from Americast, Inc. and Herrera Environmental Consultants
 Quality Assurance Project Plan Filterra® Bioretention System Phosphorus treatment and Supplemental Basic and Enhanced Treatment Performance Monitoring, Americast (November 2011)
 Filterra® letter August 24, 2012 regarding sizing for the Filterra® Shallow System.  University of Virginia Engineering Department Memo by Joanna Crowe Curran, Ph. D dated March 16, 2013 concerning capacity analysis of Filterra® internal weir inlet tray.  Terraphase Engineering letter to Jodi Mills, P.E. dated April 2, 2013 regarding Terraflume Hydraulic Test, Filterra® Bioretention System and attachments.  Technical Evaluation Report, Filterra® System Phosphorus Treatment and Supplemental Basic Treatment Performance Monitoring. March 27th, 2014.  State of Washington Department of Ecology Application for Conditional Use Level Designation, Contech Engineered Solutions (May 2015)

5  Quality Assurance Project Plan Filterra® Bioretention System, Contech Engineered Solutions (May 2015)
 Filterra Bioretention System Armco Avenue General Use Level Designation Technical Evaluation Report, Contech Engineered Solutions (August 2019)

Applicant’s Use Level Request:

General Level Use Designation for Basic (175 in/hr), Enhanced (175 in/hr), Phosphorus (100 in/hr), and Oil Treatment (50 in/hr).

Applicant’s Performance Claims:

Field-testing and laboratory testing show that the Filterra® unit is promising as a stormwater treatment best management practice and can meet Ecology’s performance goals for basic, enhanced, phosphorus, and oil treatment.

Findings of Fact:

Field Testing 2015-2019

1. Contech completed field testing of a 4 ft. x 4 ft. Filterra® unit at one site in Hillsboro, Oregon from September 2015 to July 2019. Throughout the monitoring period a total of 24 individual storm events were sampled, of which 23 qualified for TAPE sampling criteria.

2. Contech encountered several unanticipated events and challenges that prevented them from collecting continuous flow and rainfall data. An analysis of the flow data from the sampled events, including both the qualifying and non-qualifying events, demonstrated the system treated over 99 % of the influent flows. Peak flows during these events ranged from 25 % to 250 % of the design flow rate of 29 gallons per minute.

3. Of the 23 TAPE qualified sample events, 13 met requirements for TSS analysis. Influent concentrations ranged from 20.8 mg/L to 83 mg/L, with a mean concentration of 46.3 mg/L. The UCL95 mean effluent concentration was 15.9 mg/L, meeting the 20 mg/L performance goal for Basic Treatment.

4. All 23 TAPE qualified sample events met requirements for dissolved zinc analysis. Influent concentrations range from 0.0384 mg/L to 0.2680 mg/L, with a mean concentration of

0.0807 mg/L. The LCL 95 mean percent removal was 62.9 %, meeting the 60 % performance goal for Enhanced Treatment.

5. Thirteen of the 23 TAPE qualified sample events met requirements for dissolved copper analysis. Influent concentrations ranged from 0.00543 mg/L to 0.01660 mg/L, with a mean concentration of 0.0103 mg/L. The LCL 95 mean percent removal was 41.2 %, meeting the 30 % performance goal for Enhanced Treatment.

6. Total zinc concentrations were analyzed for all 24 sample events. Influent EMCs for total zinc ranged from 0.048 mg/L to 5.290 mg/L with a median of 0.162 mg/L. Corresponding effluent EMCs for total zinc ranged from 0.015 mg/L to 0.067 mg/L with a median of

6 0.029 mg/L. Total event loadings for the study for total zinc were 316.85 g at the influent and 12.92 g at the effluent sampling location, resulting in a summation of loads removal efficiency of 95.9 %.

7. Total copper concentrations were analyzed for all 24 sample events. Influent EMCs for total copper ranged from 0.003 mg/L to 35.600 mg/L with a median value of 0.043 mg/L.

Corresponding effluent EMCs for total copper ranged from 0.002 mg/L to 0.015 mg/L with a median of 0.004 mg/L. Total event loadings for total copper for the study were 1,810.06 g at the influent and 1.90 g at the effluent sampling location, resulting in a summation of loads removal efficiency of 99.9 %.

Field Testing 2013

1. Filterra completed field-testing of a 6.5 ft x 4 ft. unit at one site in Bellingham, Washington. Continuous flow and rainfall data collected from January 1, 2013 through July 23, 2013 indicated that 59 storm events occurred. Water quality data was obtained from 22 storm events. Not all the sampled storms produced information that met TAPE criteria for storm and/or water quality data.

2. The system treated 98.9 % of the total 8-month runoff volume during the testing period.

Consequently, the system achieved the goal of treating 91 % of the volume from the site.

Stormwater runoff bypassed Filterra treatment during four of the 59 storm events.

3. Of the 22 sampled events, 18 qualified for TSS analysis (influent TSS concentrations ranged from 25 to 138 mg/L). The data were segregated into sample pairs with influent concentration greater than and less than 100 mg/L. The UCL95 mean effluent concentration for the data with influent less than 100 mg/L was 5.2 mg/L, below the 20- mg/L threshold. Although the TAPE guidelines do not require an evaluation of TSS removal efficiency for influent concentrations below 100 mg/L, the mean TSS removal for these samples was 90.1 %. Average removal of influent TSS concentrations greater than 100 mg/L (three events) was 85 %. In addition, the system consistently exhibited TSS removal greater than 80 % at flow rates equivalent to a 100 in/hr infiltration rate and was observed at 150 in/hr.

4. Ten of the 22 sampled events qualified for TP analysis. Americast augmented the dataset using two sample pairs from previous monitoring at the site. Influent TP concentrations ranged from 0.11 to 0.52 mg/L. The mean TP removal for these twelve events was 72.6 %. The LCL95 mean percent removal was 66.0, well above the TAPE requirement of 50 %. Treatment above 50 % was evident at 100 in/hr infiltration rate and as high as 150 in/hr. Consequently, the Filterra test system met the TAPE Phosphorus Treatment goal at 100 in/hr. Influent ortho-P concentrations ranged from 0.005 to 0.012 mg/L; effluent ortho-P concentrations ranged from 0.005 to 0.013 mg/L. The reporting limit/resolution for the ortho-P test method is 0.01 mg/L, therefore the influent and effluent ortho-P concentrations were both at and near non-detect concentrations.

7 Field Testing 2008-2009

1. Filterra completed field-testing at two sites at the Port of Tacoma. Continuous flow and rainfall data collected during the 2008-2009 monitoring period indicated that 89 storm events occurred. The monitoring obtained water quality data from 27 storm events. Not all the sampled storms produced information that met TAPE criteria for storm and/or water quality data.

2. During the testing at the Port of Tacoma, 98.96 to 99.89 % of the annual influent runoff volume passed through the POT1 and POT2 test systems respectively. Stormwater runoff bypassed the POT1 test system during nine storm events and bypassed the POT2 test system during one storm event. Bypass volumes ranged from 0.13 % to 15.3% of the influent storm volume. Both test systems achieved the 91 % water quality treatment-goal over the 1-year monitoring period.

3. Consultants observed infiltration rates as high as 133 in/hr during the various storms.

Filterra did not provide any paired data that identified percent removal of TSS, metals, oil, or phosphorus at an instantaneous observed flow rate.

4. The maximum storm average hydraulic loading rate associated with water quality data is <40 in/hr, with the majority of flow rates < 25 in/hr. The average instantaneous hydraulic loading rate ranged from 8.6 to 53 in/hr.

5. The field data showed a removal rate greater than 80 % for TSS with an influent concentration greater than 20 mg/L at an average instantaneous hydraulic loading rate up to 53 in/hr (average influent concentration of 28.8 mg/L, average effluent concentration of 4.3 mg/L).

6. The field data showed a removal rate generally greater than 54 % for dissolved zinc at an average instantaneous hydraulic loading rate up to 60 in/hr and an average influent concentration of 0.266 mg/L (average effluent concentration of 0.115 mg/L).

7. The field data showed a removal rate generally greater than 40 % for dissolved copper at an average instantaneous hydraulic loading rate up to 35 in/hr and an average influent concentration of 0.0070 mg/L (average effluent concentration of 0.0036 mg/L).

8. The field data showed an average removal rate of 93 % for total petroleum hydrocarbon (TPH) at an average instantaneous hydraulic loading rate up to 53 in/hr and an average influent concentration of 52 mg/L (average effluent concentration of 2.3 mg/L). The data also shows achievement of less than 15 mg/L TPH for grab samples. Filterra provided limited visible sheen data due to access limitations at the outlet monitoring location.

9. The field data showed low percentage removals of total phosphorus at all storm flows at an average influent concentration of 0.189 mg/L (average effluent concentration of 0.171 mg/L). We may relate the relatively poor treatment performance of the Filterra system at this location to influent characteristics for total phosphorus that are unique to the Port of Tacoma site. It appears that the Filterra system will not meet the 50 % removal performance goal when the majority of phosphorus in the runoff is expected to be in the dissolved form.

8 Laboratory Testing

1. Filterra performed laboratory testing on a scaled down version of the Filterra unit. The lab data showed an average removal from 83-91 % for TSS with influents ranging from 21 to 320 mg/L, 82-84 % for total copper with influents ranging from 0.94 to 2.3 mg/L, and 50-61 % for orthophosphate with influents ranging from 2.46 to 14.37 mg/L.

2. Filterra conducted permeability tests on the soil media.

3. Lab scale testing using Sil-Co-Sil 106 showed removals ranging from 70.1 % to 95.5 % with a median removal of 90.7 %, for influent concentrations ranging from 8.3 to 260 mg/L. Filterra ran these laboratory tests at an infiltration rate of 50 in/hr.

4. Supplemental lab testing conducted in September 2009 using Sil-Co-Sil 106 showed an average removal of 90.6 %. These laboratory tests were run at infiltration rates ranging from 25 to 150 in/hr for influent concentrations ranging from 41.6 to 252.5 mg/L.

Regression analysis results indicate that the Filterra system’s TSS removal performance is independent of influent concentration in the concentration rage evaluated at hydraulic loading rates of up to 150 in/hr.

Contact Information:

Applicant: Jeremiah Lehman
Contech Engineered Solutions, LLC.
11815 Glenn Widing Dr
Portland, OR 97220
(503) 258-3136
[email protected]

Applicant’s Website: http://www.conteches.com

Ecology web link: http://www.ecy.wa.gov/programs/wq/stormwater/newtech/index.html

Ecology: Douglas C. Howie, P.E.

Department of Ecology
Water Quality Program
(360) 407-6444
[email protected]

Date Revision
December 2009 GULD for Basic, Enhanced, and Oil granted, CULD for Phosphorus September 2011 Extended CULD for Phosphorus Treatment
September 2012 Revised design storm discussion, added Shallow System.

January 2013 Revised format to match Ecology standards, changed Filterra contact information
February 2013 Added FTIB-P system
March 2013 Added FTIB-C system
April 2013 Modified requirements for identifying appropriate size of unit

9 June 2013 Modified description of FTIB-C alternate configuration March 2014 GULD awarded for Phosphorus Treatment. GULD updated for a higher flow-rate for Basic Treatment.

June 2014 Revised sizing calculation methods
March 2015 Revised Contact Information
June 2015 CULD for Basic and Enhanced at 100 in/hr infiltration rate September 2019 GULD for Basic and Enhanced at 175 in/hr infiltration rate February 2020 Revised sizing language to note sizing based on off-line calculations.

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Appendix 7: Hydromodification
Supporting Detail Relating to Hydrologic Conditions of Concern

HYDROMODIFICATION STUDY
FOR

SYCAMORE HILL BUSINESS CENTER

MARCH JOINT POWERS AUTHORITY

COUNTY OF RIVERSIDE, CA

Prepared for:

Darrel Butler
Inland Investments, Inc.
1450 Iowa Ave. Suite 220
Riverside, CA, 92507

March 10, 2020

Prepared by:

Dr. Luis A. Parra, PhD, PE, CFM, ToR, D.WRE.

R.C.E. 66377

REC Consultants
2442 Second Avenue
San Diego, CA 92101
Telephone: (619) 232-9200

Sycamore Hills Business Center
HMP Analysis

1 HYDROMODIFICATION STUDY FOR SYCAMORE HILL BUSINESS CENTER MARCH JOINT POWER AUTHORITY, RIVERSIDE COUNTY, CA.

1. OBJECTIVE
The purpose of this study is to prove that hydromodification conditions are met for the Sycamore Hill Business Center Project (also called JPA-Butler) when a system with multiple bio-retention basins and an underground system is designed to control the runoff discharge of the post-development conditions. Per the Water Quality Management Plan for the Santa Ana Region of Riverside County, h ydromodification conditions are met when: the post-development peak flows for the 24-hour, 2-year storm event are less, equal or do not exceed by more than 10 percent, the peak fl ows for the pre-development conditions of the same storm.

2. INTRODUCTION
At this point, it is important to highlight the following: the overall Drainage Study prepared by REC for this project already includes the analysis of the 2 -yr, 24-hr storm event in pre and post -development conditions. Therefore, all explanations, descriptions, assumptions, and results from this specific project are taken directly from the aforementioned report. The intent is that this report is self -sufficient to explain hydromodification compliance, but for any further details not included here, please refer to the REC Drainage Study for Sycamore Hills Business Center,
In regards to the project, the proposed JPA -Butler project is an industrial warehouse that will be constructed northeast of the Alessandro Avenue and Barton Street intersection. The project includes the construction of two (2) buildings, parking lots and associated landscaping. The two proposed buildings are separated by a natural channel.

To compare the pre and post -development runoff charact eristics, methodologies outlined in the Riverside County Flood Control and Water Conservation District Hydrology Manual (Hydrology Manual) were used. The 2 year storm is the design return period for analyzing the hydromodification impacts of the proposed project. This storm event was analyzed for 24-hr duration for both pre-development and post-development conditions.

3. PRE AND POST DEVELOPED CONDITIONS AND OFFSITE RUNOFF In existing conditions, the Sycamore Hills Business Center project site is a wetland containing sparse vegetation and various natural channels/discharge points. The existing site is comprised of five (5) Sycamore Hills Business Center
HMP Analysis

2 drainage management areas (DMAs) and two (2) sub areas which each drain to their respective points of discharge (POD).

The proposed development includes two (2 ) industrial buildings with associated driveways, walkways, and landscaping. In post -development condition, the Sycamore Hills Business Center project site will contain ten (10) drainage management areas (DMAs) and three (3) sub areas as in existing condit ions. A detailed post-development conditions description of each DMA is provided in the following paragraphs.

DMA-1 remains undeveloped in post -development conditions. Runoff from DMA -1 overland flows to POD-1. POD -1 is a natural flow path located near th e northwestern corner of the project site.POD -1 receives practically no offsite run-on, thus there is no need to preserve or divert any offsite flow.

DMA-2A, 2C, and 2D consist of the eastern, western and northern side of the proposed western building, parking lot/driveway, and landscape area. Runoff from these areas will first surface flow into Filterras for water quality treatment prior to discharging into an underground detention system. Runoff from the detention system will then discharge to POD-2.

DMA-2B will contain the southern portion of the proposed western building which will overland flow to Basin 2-1. Basin 2-1 is located upstream of Basin 2 -2 and is configured such that detained flows shall be conveyed to POD -2 and overflows from Basin 2 -1 will discharge to Basin 2 -2 for additional detention.

Detained outflows from the underground detention system and the basins will be confluenced at POD-2.

DMA-2E consists of the parking lot in Parcel C located at the North West corner of the site. Parcel C will be dedicated to the City to be used in conjunction with an adjacent trail. This DMA will have a sep arate Filterra BMP to treat runoff from this parcel. Runoff from the BMP will then discharge to POD-2.

DMA-2F is the self-treating area that will remain undisturbed along the north east side of building B. This area will flow overland to POD-2.

POD-2 is a natural flow path located near the northeast corner of the western development. POD -2 receives a significant and undetermined amount of run -on from th e 48” pipe discharging into the property (see exhibits, point 2 -1). This flow will be captured in a 48” pipe that will cross thru the proposed project along the northern parking lot of Building B and will discharge to POD -2. In regards to run-on from the s outh (see point 2 -2 on the exhibits) run -on will be captured in a proposed brow - ditch/pipe system to be designed at a later phase of this project, and conveyed to POD-2.

DMA 3 will remain undeveloped in existing and proposed development conditions. There are two (2) sub-areas within DMA-3 which will be subject to development. These sub -areas are designated DMA-3A and DMA -3B and a description of these shall be subsequently provided. Runoff from DMA -3 flows to POD-3. Note that POD -3 receives offsite run -on, via stormdrain, from the residential/commercial developments to the south of Alessandro Boulevard and the surface flow run -on from the adjacent abandoned developed lot.

Sycamore Hills Business Center
HMP Analysis

3 DMA-3A consists of the southern entrance and southern parking lot of the eastern building. Runoff from DMA-3A shall overland flow to a proposed basin, Basin -3A, for detention and storage. DMA -3B consists of the eastern portion and southwestern portion of the eastern building. Runoff from DMA -3B shall overland flow to a proposed basin, Bas in-3B for detention and storage. Detained outflows from Basins 3A and 3B shall confluence at POD-3.

POD-3 is a natural flow path located near the northwestern corner of the eastern development. POD -3 receives run-on from point 3-1. Notice that in this case, the natural conveyance system will be preserved as the natural channel from 3 -1 to POD -3 is an area of no development; consequently, any run -on coming to 3-1 can flow freely to POD -3. It should be mentioned that OFF -S1 represents the discharge of a pipe system into the natural channel, but such discharge and flow path occurs off -site the property until point 3-1 is reached. Note that PODs 3A and 3B are natural flow paths located upstream of POD-3.

DMA-4 consists of the remaining building and parking lot of the eastern development which does not drain to PODs 3A or 3B. Runoff from DMA -4 overland flows to Basin -4 for detention and treatment.

Runoff from DMA -4 flows to POD -4. POD-4 is a natural flowpath located near the northeast corner of the eastern development.

DMA-4A contains a small area of pervious landscaping at the north east corner of the site that bypasses the BMPs and drains directly to POD-4.

POD-4 receives a small and undetermined amount of sheet -flow from the adjacent areas that enters to the property at 4-1, 4-2 and 4-3. The runoff from this area located to the east of the property line will be captured by a proposed brow -ditch / pipe system to be designed at a later phase of this project, and conveyed to POD-4.

DMA-5 remains undeveloped in post-development conditions. Runoff from DMA-5 flows to POD-5. POD- 5 is a natural flowpath located near the southeastern corner of the eastern development.

POD-5 receives run-on from multiple sources. All run-on eventually reaching POD-5 will flow thru natural conveyance systems and areas to be preserved, and consequently the project will have no impact on how this run -on flows. The only exception is the entrance road that must include a culvert designed to convey the run -on from 5 -1 and the little run -off produced by the property area west of the entrance.

This culvert will be designed at a later phase of this project.

Please refer to the project WQMP for water quality analysis and results as water quality considerations are outside the scope of this report.

For the purpose of this study, only DMAs which are subject to development will be analyzed in both existing and proposed conditions, using the Synthetic Unit Hydrograph Methodology as explained in the Riverside County Flood Control and Water Conservation District Hydrology Manual (HM). Information about the method is included in the appendices. Hydrology maps can be seen in Appendix 7.1.

Sycamore Hills Business Center
HMP Analysis

4 4. GENERAL HYDROLOGIC CONSIDERATIONS

• The 2 yr, 24 hr precipitation value has been obtained from NOAA website at the location of the project and it is equal to 1.83 inches.
• Soil types have been obtained from the USDA soil survey web site at the project area (Appendix

7.2). The project contains soils type B, C and D. Runoff Index values (RI) have been determined with this information and are also included in the appendices. • Infiltration losses were calculated using the RI values in pre -development (69. 80 and 85 for a combination of open brush, grass and chaparral) and post -development (56, 69 and 75 for commercial landscaping). A different weighted average of the infiltration value was obtained for different sub-areas based on the percentage of soil B, C and D that each area possesses.

4.1 Short Cut Hydrograph Method
According to the longest waterpath characteristics, an average Manning’s coefficient and the existing slope, a lag time was determined (see Appendix 4). Since such lag time is smaller tha n 5 min in both pre and post development conditions, the Short Cut Hydrograph Method is used (see Appendix 3 for explanation of the Method taken directly from the HM).

The application of the Short Cut Hydrograph Method in existing conditions (Appendix 4) and in post - development conditions (Appendix 5) allows the determination of the hydrographs (and consequently peak flows) for the storms indicated. The unit time is set to 5 minutes for the 3 and 6 -hr storm and 15 minutes for the 24 -hr event. The unit time step is set equal to the time of concentration (pre and post) for the 1-hr storm.

Table 1 provides a comparison of the tributary area for each POD

TABLE 1 – AREA COMPARISON PER POD
POD Existing (ac) Proposed (ac) Difference (ac)
1 1.24 0.07 -1.17
2 9.97** 11.96** 1.99
3* 9.65 6.21 -3.44
3A 4.03 4.55 0.52
3B 1.61 3.46 1.85
4 12.12 13.82 1.7
5 9.59 7.96 -1.63
Total 48.22 48.22 0.00
*Does not include the area of 3A and 3B.

Sycamore Hills Business Center
HMP Analysis

5 **This includes the proposed parking lot that will be dedicated to the City (DMA-E) and the area draining to POD-2 that will remain undisturbed. Hence why these areas do not match the area shown on the calculations for the routing portion (but it is reported in the table to verify total area) .

As noted, the proposed conditions tributary area to PODs 1, 3, and 5 reduced compared to existing conditions. The land use (i.e. undeveloped) remains the same in both existing and proposed conditions Therefore the flows to the aforementioned PODs are going to be lower in proposed conditions compared to existing conditions. Thus no further analysis is necessary at PODs 1, 3, and 5. Furthermore, DMA-2E consists of a parking lot to be dedicated to the City which will not be analyzed in this study. Any detention or analysis required for this area to be performed by the City.

Table 2 provides a summary of the hydromodification flow rates for both existing and proposed - unmitigated conditions for the PODs that need to be analyzed: 2, 3A, 3B, and 4.

TABLE 2 – EXISTING AND PROPOSED CONDITIONS PEAK FLOWS (cfs) at PODs 2, 3A, 3B, and 4

Condition
2-YR, 24-HR Hydrographs Results
2 3A 3B 4
Existing 0.46 0.20 0.08 0.61
Proposed: Post-Unmitigated 2.16 0.98 0.63 2.87
Proposed: Post-Routed* 0.46 0.19 0.06 0.43
Difference: routed - existing 0.00 -0.01 -0.02 -0.18
*: result after Modified Puls and combination of hydrographs

Prior to discharging from the project site, first flush runoff will be treated via four (4) bioretention based BMPs and four (4) Filterra proprietary bioretention BMPs which drain to one (1) combination underground detention system in accordance with standards set forth by the Regional Water Quality Control Board and the County of Riverside’s BMP Design Manual (see “Water Quality Management Plan for Butler”).

The multi -purpose bioretention b asins and combination underground detention plus proprietary bioretention BMPs are located within the project site and are responsible for addressing water quality (including HCOC) and flood control r equirements for the project. The Filterra’s will not be utilized for detention and all flows entering the Filterras will discharge into the underground detention system for attenuation with an exception for the Filterra of DMA-2E which will discharge directly to POD-2.

In developed conditions, the basins will have a surface depth and a riser spillway structure. Flows will infiltrate through the surface of the facility to the receiving amended soil and French Drain. The riser Sycamore Hills Business Center
HMP Analysis

6 structure will act as a spillway such that peak flows can be safely discharged to the receiving natural channel.

Beneath the basin’s invert lays the proposed bioretention portion of the drainage facility. This portion of the basin is com prised of a 3 -inch layer of mulch, a layer of amended soil (a highly sandy, organic rich composite with an infiltration capacity of at least 5 inches/hr) and a layer of gravel. The basins are to be lined to prevent infiltration into the native soil. Tables 3, 4 and 5 provide a summary of the BMPs and riser structure.

TABLE 3 – SUMMARY OF BMP BASIN DIMENSIONS
BMP Tributary
Area (Ac)

DIMENSIONS
BMP Area(1)
(ft2)
Gravel
Depth (ft)
Amended Soils
Depth(2) (ft)
Total Basin
Depth(3) (ft)
2B-1 5.85(4) 1,829 1.00 3.00 3.00
2B-2 - 4,352 1.00 3.00 5.00
3A 4.55 6,757 1.00 3.00 4.50
3B 3.46 10,584 1.00 2.00 3.50
4 13.82 15,085 1.00 3.00 6.00
Notes: (1) Area at flat bottom of basin
(2) Includes 3-inch mulch layer
(3) Total surface depth of BMP from top crest elevation to top of mulch (4) All runoff from DMA-2B is conveyed to Basin-1. Overflows from Basin-1 are conveyed to Basin-2 for additional detention

TABLE 4 – SUMMARY OF OUTLET DETAILS
BMP
Low Orifice Middle Orifice Lower Slot Upper Slot Top Riser Diam.
(in)
H(1)
(ft)
Diam.
(in)
H(1)
(ft)
B x h
(in)
H(1)
(ft)
B x h
(in)
H(1)
(ft)
L(2)
(ft)
H(1)
(ft)
2A 2.125 0.00 0.825 3.00 9 x 3 4.50 N/A N/A 3.50 7.25
2B-1 0.750 0.00 N/A N/A 6 x 2 4.50 N/A N/A 16 6.00
2B-2 1.625 0.00 1.00(3) 4.50 0.25 x 0.25 7.00 N/A N/A 16 8.50 3A 1.67 0.00 0.875 4.50 N/A N/A 11.5 x 2 6.25 16 8.25
3B 1.125 0.00 1.50 3.50 N/A N/A N/A N/A 12 5.50
4 2.25 0.00 1.75 4.50 24 x 3 7.00 N/A N/A 12 8.75
Sycamore Hills Business Center
HMP Analysis

7 Notes: (1): H = Elevation Bottom of gravel layer assumed to be 0.00 ft elevation. (2): Overflow length is the internal perimeter of the riser structure (3 ft x 3 ft or 4 ft x 4 ft internal dimensions)
(3): There are a total of three (3) orifices.

TABLE 5 – SUMMARY OF UNDERGROUND DETENTION DIMENSIONS
BMP Tributary
Area (Ac)

DIMENSIONS
Size Area(1)
(ft2)
Total
Depth (ft)
Total
Volume (ft3) Upstream BMP
2ACD 4.657 4 x 225’
Rows(2) 11,500 7.50 38,470 Filterra Units(3)
Notes: (1) Area includes the storage tanks and the gravel storage layer below the tanks. (2) Proposed underground system is Stormtech MC-4500.
(3) Proposed proprietary BMP is a Filterra (Appendix 8). Not used for detention. See WQMP for more information.

4.2 Routing Assumptions
A routing for the hydrographs discharged from the each DMA was applied. The following assumption was made:
• The flow rate below the first surface outlet in the riser structure is equal to the infiltration capacity of the amended soils layer (5in/hr)
• The outflow from the low flow orifice for DMA-2B basin one will be routed to POD-2. Flows through the riser of Basin-1 for DMA-2B became the inflows to Basin-2 for DMA-2B. • The outflow hydrographs from the proposed underground detention system for DMA -2A and the basins for DMA-2B were all summed at POD-2.

5. POST-DEVELOPMENT RESULTS AND CONCLUSION
Table 2 in previous pages shows the mitigated outflows for the 2 yr -24 hr storm analyzed, including a comparison between the existing and mitigated -proposed conditions outflows. As seen in the table, the 2 yr -24 hr peak flow rate for all analyzed PODs have decreased compared to the pre -developed condition. The remaining three (3) PODs (1, 3 and 5) were not analyzed because the overall contributing area reduced (See Table 1) and no imperviou s areas were draining to those PODs, which implies a reduction of the peak of the 2yr -24hr storm . Therefore, The proposed BMPs satisfy the conditions needed for hydromodification compliance: all PODs have peaks smaller, or not in excess of 110% of the pre-development peak flow generated by the 2 year – 24 hour storm event.

6. REFERENCES
o Riverside County Hydrology Manual, 1979.

Sycamore Hills Business Center
HMP Analysis

8 7. APPENDIX LIST

Appendix 7.1: Maps
Appendix 7.2: Precipitation and Soil Information:

NOAA Precipitation; USDA Hydrologic Soil Type
Appendix 7.3: RCFCWCD-Hydrology Manual:

RI Tables; RI vs Infiltration Graphics; Short Cut Synthetic Hydrograph Method Appendix 7.4: Pre-Development Information:

Areas, % Impervious; RI, Infiltration; Tlag; Pre-Dev. Hydrograph Results Appendix 7.5: Post-Development Information:

Areas, % Impervious; RI, Infiltration; Tlag; Post-Dev. Hydrograph Results Appendix 7.6: Elevation – Volume – Discharge Tables for Modified Puls Appendix 7.7: Modified Puls Results

Sycamore Hills Business Center
HMP Analysis

APPENDIX 7.1: MAPS

Sycamore Hills Business Center
Drainage Study

THIS PAGE INTENTIONALLY LEFT BLANK FOR DOUBLE SIDED PRINTING

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RIVERSIDE, CA 91111
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Sycamore Hills Business Center
HMP Analysis

APPENDIX 7.2: P RECIPITATION AND SOIL INFORMATION

• NOAA PRECIPITATION

• USDA HYDROLOGIC SOIL TYPE

Sycamore Hills Business Center
Drainage Study

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/51 /82 /80/57/61/62 /82 /76 /51 /63 /85
/129 /3 /27 /0 /3 /40 /130 /3 /27 /0 /41 /41 /131
/82 /76 /51 /81 /82
/129 /3 /27 /0 /42 /0 /130 /3 /27 /2 /3 /41 /131
/82 /76 /63 /63 /59
/129 /3 /27 /0 /4 /4 /130 /3 /27 /2 /40 /41 /131
/82 /76 /63 /81 /52
/129 /3 /27 /2 /2 /132 /130 /3 /27 /36 /36 /132 /131
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/51 /83 /80/57/61/62 /82 /76 /51 /83 /83
/129 /3 /27 /0 /2 /37 /130 /3 /27 /0 /4 /40 /131
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/129 /3 /27 /2 /40 /42 /130 /3 /27 /42 /3 /40 /131
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/75 /82 /80/57/61/62 /82 /76 /63 /75 /52
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/59 /82 /80/57/61/62 /82 /76 /75 /75 /59
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/59 /76 /75/51
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/85 /76 /51/51
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Sycamore Hills Business Center
Drainage Study

Sycamore Hills Business Center
Drainage Study

Sycamore Hills Business Center
HMP Analysis

APPENDIX 3: RCFCWCD-HYDRO LOGY MANUAL

• RUNOFF INDEX TABLES

• RI VS. INFILTRATION GRAPHIC

• SHORT CUT SYNTHETIC HYDROGRAPH METHOD

Sycamore Hills Business Center
Drainage Study

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Sycamore Hills Business Center
Drainage Study

POD-1:10min
POD-2:23min
POD-3A:17min
POD-3B:13min
POD-4:25min
POD-5:25min

EXISTING

Sycamore Hills Business Center
Drainage Study

POD-2A: 7Min
POD-2B: 7Min
POD-3A:17min
POD-3B:5.5min
POD-5:25min

PROPOSED CONDITIONS
Sycamore Hills Business Center
Drainage Study

Sycamore Hills Business Center
Drainage Study

COMPOSITE AMC-I (2&5yr): 0.50
COMPOSITE AMC-II (10&100yr): 0.30
Sycamore Hills Business Center
Drainage Study

Sycamore Hills Business Center
Drainage Study

Credit: Riverside County Flood Control and Water Conservation District

Sycamore Hills Business Center
Drainage Study

Credit: Riverside County Flood Control and Water Conservation District

Sycamore Hills Business Center
Drainage Study

Credit: Riverside County Flood Control and Water Conservation District

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Sycamore Hills Business Center
HMP Analysis

APPENDIX 4: PRE-DEVELOPMENT INFORMATION

• AREAS, % IMPERVIOUS

• RI, INFILTRATION

• TLAG

• PRE-DEV. SHORT CUT SYNTHETIC HYDROGRAPH RESULTS FOR
ANALYZED STORMS AND PODs 2, 3A, 3B, and 4.

Sycamore Hills Business Center
Drainage Study

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Pre-Development - POD-2
Area: 9.098 acres Per Hydrology Map (to use in this report) Pervious B: 5.970 acres
Pervious C: 2.621 acres
Pervious D: 0.507 acres
% perv B: 65.6% Soil Type: B/C/D
% perv C: 28.8%
% perv D: 5.6%
% imperv: 0.0% RI (Plate D-5.5): 69/80/85 (Open Brush/Grass/Chapparal - Fair) RI (Plate D-5.5): 90 (impervious)
RI: AMC-I AMC-II AMC-III
69 0.57 0.375 0.195 (Plate E-6.2)
80 0.44 0.25 0.115 (Plate E-6.2)
85 0.36 0.185 0.080 (Plate E-6.2)
Weighted 0.42 0.24 0.11
Synthetic Unit Hydrograph
Pre-Development Determination (Flowline of area)
n: 0.03 (interpretation of Plate E.3)
L: 1111 ft 0.210 miles
Lca: 525 ft 0.099 miles
U/S: 1607 ft
D/S: 1578 ft
s: 0.0261 ft/ft 137.8 ft/mile
tlag: 3.90 min
∆t (3hr, 6hr): 5 min
∆t (24hr): 15 min
As tlag < 5 - 7 min, Short Cut Hydrograph Method Used.

Pre-Development - POD-2
Return Period: 2 yr Low Loss Rate %: 80%
Duration of Rain: 24 hr % impervious: 0.0%
Rainfall: 1.83 inches Fp (AMC-I): 0.42 in/hr
Area: 9.10 acres Constant loss rate, F: 0.42 in/hr
Fm (as a % of F): 0.500
Volume: 12087 cu-ft Peak: 0.46 cfs
Period Time Pattern % Intensity Max Loss Low Effective TOTAL Volume (min) (in/hr) (in/hr) (in/hr) (in/hr) (cfs) (cf)
0 0.000 0
1 15 0.2 0.015 0.734 0.012 0.003 0.027 24
2 30 0.3 0.022 0.726 0.018 0.004 0.040 36
3 45 0.3 0.022 0.717 0.018 0.004 0.040 36
4 60 0.4 0.029 0.709 0.023 0.006 0.054 48
5 75 0.3 0.022 0.700 0.018 0.004 0.040 36
6 90 0.3 0.022 0.692 0.018 0.004 0.040 36
7 105 0.3 0.022 0.684 0.018 0.004 0.040 36
8 120 0.4 0.029 0.675 0.023 0.006 0.054 48
9 135 0.4 0.029 0.667 0.023 0.006 0.054 48
10 150 0.4 0.029 0.659 0.023 0.006 0.054 48
11 165 0.5 0.037 0.651 0.029 0.007 0.067 60
12 180 0.5 0.037 0.643 0.029 0.007 0.067 60
13 195 0.5 0.037 0.635 0.029 0.007 0.067 60
14 210 0.5 0.037 0.627 0.029 0.007 0.067 60
15 225 0.5 0.037 0.619 0.029 0.007 0.067 60
16 240 0.6 0.044 0.612 0.035 0.009 0.081 73
17 255 0.6 0.044 0.604 0.035 0.009 0.081 73
18 270 0.7 0.051 0.596 0.041 0.010 0.094 85
19 285 0.7 0.051 0.589 0.041 0.010 0.094 85
20 300 0.8 0.059 0.581 0.047 0.012 0.107 97
21 315 0.6 0.044 0.573 0.035 0.009 0.081 73
22 330 0.7 0.051 0.566 0.041 0.010 0.094 85
23 345 0.8 0.059 0.558 0.047 0.012 0.107 97
24 360 0.8 0.059 0.551 0.047 0.012 0.107 97
25 375 0.9 0.066 0.544 0.053 0.013 0.121 109
26 390 0.9 0.066 0.537 0.053 0.013 0.121 109
27 405 1 0.073 0.529 0.059 0.015 0.134 121
28 420 1 0.073 0.522 0.059 0.015 0.134 121
29 435 1 0.073 0.515 0.059 0.015 0.134 121
30 450 1.1 0.081 0.508 0.064 0.016 0.148 133
31 465 1.2 0.088 0.501 0.070 0.018 0.161 145
32 480 1.3 0.095 0.494 0.076 0.019 0.175 157
33 495 1.5 0.110 0.487 0.088 0.022 0.201 181
34 510 1.5 0.110 0.481 0.088 0.022 0.201 181
35 525 1.6 0.117 0.474 0.094 0.023 0.215 193
36 540 1.7 0.124 0.467 0.100 0.025 0.228 205
37 555 1.9 0.139 0.461 0.111 0.028 0.255 230
38 570 2 0.146 0.454 0.117 0.029 0.269 242
39 585 2.1 0.154 0.448 0.123 0.031 0.282 254
40 600 2.2 0.161 0.441 0.129 0.032 0.295 266
41 615 1.5 0.110 0.435 0.088 0.022 0.201 181
42 630 1.5 0.110 0.428 0.088 0.022 0.201 181
43 645 2 0.146 0.422 0.117 0.029 0.269 242
44 660 2 0.146 0.416 0.117 0.029 0.269 242
45 675 1.9 0.139 0.410 0.111 0.028 0.255 230
46 690 1.9 0.139 0.404 0.111 0.028 0.255 230
47 705 1.7 0.124 0.398 0.100 0.025 0.228 205
48 720 1.8 0.132 0.392 0.105 0.026 0.242 218
49 735 2.5 0.183 0.386 0.146 0.037 0.336 302
50 750 2.6 0.190 0.380 0.152 0.038 0.349 314
51 765 2.8 0.205 0.375 0.164 0.041 0.376 338
52 780 2.9 0.212 0.369 0.170 0.042 0.389 351
53 795 3.4 0.249 0.363 0.199 0.050 0.457 411
54 810 3.4 0.249 0.358 0.199 0.050 0.457 411
55 825 2.3 0.168 0.352 0.135 0.034 0.309 278
56 840 2.3 0.168 0.347 0.135 0.034 0.309 278
57 855 2.7 0.198 0.342 0.158 0.040 0.363 326
58 870 2.6 0.190 0.337 0.152 0.038 0.349 314
59 885 2.6 0.190 0.331 0.152 0.038 0.349 314
60 900 2.5 0.183 0.326 0.146 0.037 0.336 302
61 915 2.4 0.176 0.321 0.141 0.035 0.322 290
62 930 2.3 0.168 0.316 0.135 0.034 0.309 278
63 945 1.9 0.139 0.312 0.111 0.028 0.255 230
64 960 1.9 0.139 0.307 0.111 0.028 0.255 230
65 975 0.4 0.029 0.302 0.023 0.006 0.054 48
66 990 0.4 0.029 0.298 0.023 0.006 0.054 48
67 1005 0.3 0.022 0.293 0.018 0.004 0.040 36
68 1020 0.3 0.022 0.289 0.018 0.004 0.040 36
69 1035 0.5 0.037 0.284 0.029 0.007 0.067 60
70 1050 0.5 0.037 0.280 0.029 0.007 0.067 60
71 1065 0.5 0.037 0.276 0.029 0.007 0.067 60
72 1080 0.4 0.029 0.272 0.023 0.006 0.054 48
73 1095 0.4 0.029 0.268 0.023 0.006 0.054 48
74 1110 0.4 0.029 0.264 0.023 0.006 0.054 48
75 1125 0.3 0.022 0.260 0.018 0.004 0.040 36
76 1140 0.2 0.015 0.256 0.012 0.003 0.027 24
77 1155 0.3 0.022 0.253 0.018 0.004 0.040 36
78 1170 0.4 0.029 0.249 0.023 0.006 0.054 48
79 1185 0.3 0.022 0.246 0.018 0.004 0.040 36
80 1200 0.2 0.015 0.242 0.012 0.003 0.027 24
81 1215 0.3 0.022 0.239 0.018 0.004 0.040 36
82 1230 0.3 0.022 0.236 0.018 0.004 0.040 36
83 1245 0.3 0.022 0.233 0.018 0.004 0.040 36
84 1260 0.2 0.015 0.230 0.012 0.003 0.027 24
85 1275 0.3 0.022 0.228 0.018 0.004 0.040 36
86 1290 0.2 0.015 0.225 0.012 0.003 0.027 24
87 1305 0.3 0.022 0.223 0.018 0.004 0.040 36
88 1320 0.2 0.015 0.220 0.012 0.003 0.027 24
89 1335 0.3 0.022 0.218 0.018 0.004 0.040 36
90 1350 0.2 0.015 0.216 0.012 0.003 0.027 24
91 1365 0.2 0.015 0.214 0.012 0.003 0.027 24
92 1380 0.2 0.015 0.212 0.012 0.003 0.027 24
93 1395 0.2 0.015 0.211 0.012 0.003 0.027 24
94 1410 0.2 0.015 0.210 0.012 0.003 0.027 24
95 1425 0.2 0.015 0.209 0.012 0.003 0.027 24
96 1440 0.2 0.015 0.208 0.012 0.003 0.027 24
97 1455 0.000 0

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Pre‐Development ‐ POD‐3A
Area: 4.033 acres Per Hydrology Map (to use in this report) Pervious B: 0.000 acres
Pervious C: 3.979 acres
Pervious D: 0.054 acres
% perv B: 0.0% Soil Type: B/C/D
% perv C: 98.7%
% perv D: 1.3%
% imperv: 0.0% RI
(Plate D‐5.5): 69/80/85 (Open Brush/Grass/Chapparal ‐ Fair) RI (Plate D‐5.5): 90 (impervious)
RI: AMC‐I AMC‐II AMC‐III
69 0.57 0.375 0.190 (Plate E‐6.2)
80 0.44 0.25 0.115 (Plate E‐6.2)
85 0.36 0.185 0.080
Weighted 0.44 0.25 0.11
Synthetic Unit Hydrograph
Pre‐Development Determination (Flowline of area)
n: 0.03 (interpretation of Plate E.3)
L: 640 ft 0.121 miles
Lca: 278 ft 0.053 miles
U/S: 1608 ft
D/S: 1572 ft
s: 0.0563 ft/ft 297.0 ft/mile
tlag: 2.15 min
∆t (3hr, 6hr): 5 min
∆t (24hr): 15 min
As tlag < 5 ‐ 7 min, Short Cut Hydrograph Method Used.

Pre‐Development ‐ POD‐3A
Return Period: 2 yr Low Loss Rate %: 80%
Duration of Rain: 24 hr % impervious: 0.0%
Rainfall: 1.83 inches Fp (AMC‐I): 0.44 in/hr
Area: 4.03 acres Constant loss rate, F: 0.439 in/hr
Fm (as a % of F): 0.500
Volume: 5359 cu‐ft Peak: 0.20 cfs
Period Time Pattern % Intensity Max Loss Low Effective TOTAL Volume (min) (in/hr) (in/hr) (in/hr) (in/hr) (cfs) (cf)
0 0.000 0
1 15 0.2 0.015 0.775 0.012 0.003 0.012 11
2 30 0.3 0.022 0.766 0.018 0.004 0.018 16
3 45 0.3 0.022 0.757 0.018 0.004 0.018 16
4 60 0.4 0.029 0.748 0.023 0.006 0.024 21
5 75 0.3 0.022 0.739 0.018 0.004 0.018 16
6 90 0.3 0.022 0.731 0.018 0.004 0.018 16
7 105 0.3 0.022 0.722 0.018 0.004 0.018 16
8 120 0.4 0.029 0.713 0.023 0.006 0.024 21
9 135 0.4 0.029 0.705 0.023 0.006 0.024 21
10 150 0.4 0.029 0.696 0.023 0.006 0.024 21
11 165 0.5 0.037 0.688 0.029 0.007 0.030 27
12 180 0.5 0.037 0.679 0.029 0.007 0.030 27
13 195 0.5 0.037 0.671 0.029 0.007 0.030 27
14 210 0.5 0.037 0.662 0.029 0.007 0.030 27
15 225 0.5 0.037 0.654 0.029 0.007 0.030 27
16 240 0.6 0.044 0.646 0.035 0.009 0.036 32
17 255 0.6 0.044 0.638 0.035 0.009 0.036 32
18 270 0.7 0.051 0.629 0.041 0.010 0.042 38
19 285 0.7 0.051 0.621 0.041 0.010 0.042 38
20 300 0.8 0.059 0.613 0.047 0.012 0.048 43
21 315 0.6 0.044 0.605 0.035 0.009 0.036 32
22 330 0.7 0.051 0.598 0.041 0.010 0.042 38
23 345 0.8 0.059 0.590 0.047 0.012 0.048 43
24 360 0.8 0.059 0.582 0.047 0.012 0.048 43
25 375 0.9 0.066 0.574 0.053 0.013 0.054 48
26 390 0.9 0.066 0.567 0.053 0.013 0.054 48
27 405 1 0.073 0.559 0.059 0.015 0.060 54
28 420 1 0.073 0.551 0.059 0.015 0.060 54
29 435 1 0.073 0.544 0.059 0.015 0.060 54
30 450 1.1 0.081 0.537 0.064 0.016 0.065 59
31 465 1.2 0.088 0.529 0.070 0.018 0.071 64
32 480 1.3 0.095 0.522 0.076 0.019 0.077 70
33 495 1.5 0.110 0.515 0.088 0.022 0.089 80
34 510 1.5 0.110 0.507 0.088 0.022 0.089 80
35 525 1.6 0.117 0.500 0.094 0.023 0.095 86
36 540 1.7 0.124 0.493 0.100 0.025 0.101 91
37 555 1.9 0.139 0.486 0.111 0.028 0.113 102
38 570 2 0.146 0.479 0.117 0.029 0.119 107
39 585 2.1 0.154 0.473 0.123 0.031 0.125 113
40 600 2.2 0.161 0.466 0.129 0.032 0.131 118
41 615 1.5 0.110 0.459 0.088 0.022 0.089 80
42 630 1.5 0.110 0.452 0.088 0.022 0.089 80
43 645 2 0.146 0.446 0.117 0.029 0.119 107
44 660 2 0.146 0.439 0.117 0.029 0.119 107
45 675 1.9 0.139 0.433 0.111 0.028 0.113 102
46 690 1.9 0.139 0.426 0.111 0.028 0.113 102
47 705 1.7 0.124 0.420 0.100 0.025 0.101 91
48 720 1.8 0.132 0.414 0.105 0.026 0.107 96
49 735 2.5 0.183 0.408 0.146 0.037 0.149 134
50 750 2.6 0.190 0.402 0.152 0.038 0.155 139
51 765 2.8 0.205 0.396 0.164 0.041 0.167 150
52 780 2.9 0.212 0.390 0.170 0.042 0.173 155
53 795 3.4 0.249 0.384 0.199 0.050 0.202 182
54 810 3.4 0.249 0.378 0.199 0.050 0.202 182
55 825 2.3 0.168 0.372 0.135 0.034 0.137 123
56 840 2.3 0.168 0.366 0.135 0.034 0.137 123
57 855 2.7 0.198 0.361 0.158 0.040 0.161 145
58 870 2.6 0.190 0.355 0.152 0.038 0.155 139
59 885 2.6 0.190 0.350 0.152 0.038 0.155 139
60 900 2.5 0.183 0.345 0.146 0.037 0.149 134
61 915 2.4 0.176 0.339 0.141 0.035 0.143 129
62 930 2.3 0.168 0.334 0.135 0.034 0.137 123
63 945 1.9 0.139 0.329 0.111 0.028 0.113 102
64 960 1.9 0.139 0.324 0.111 0.028 0.113 102
65 975 0.4 0.029 0.319 0.023 0.006 0.024 21
66 990 0.4 0.029 0.314 0.023 0.006 0.024 21
67 1005 0.3 0.022 0.309 0.018 0.004 0.018 16
68 1020 0.3 0.022 0.305 0.018 0.004 0.018 16
69 1035 0.5 0.037 0.300 0.029 0.007 0.030 27
70 1050 0.5 0.037 0.296 0.029 0.007 0.030 27
71 1065 0.5 0.037 0.291 0.029 0.007 0.030 27
72 1080 0.4 0.029 0.287 0.023 0.006 0.024 21
73 1095 0.4 0.029 0.283 0.023 0.006 0.024 21
74 1110 0.4 0.029 0.279 0.023 0.006 0.024 21
75 1125 0.3 0.022 0.275 0.018 0.004 0.018 16
76 1140 0.2 0.015 0.271 0.012 0.003 0.012 11
77 1155 0.3 0.022 0.267 0.018 0.004 0.018 16
78 1170 0.4 0.029 0.263 0.023 0.006 0.024 21
79 1185 0.3 0.022 0.260 0.018 0.004 0.018 16
80 1200 0.2 0.015 0.256 0.012 0.003 0.012 11
81 1215 0.3 0.022 0.253 0.018 0.004 0.018 16
82 1230 0.3 0.022 0.249 0.018 0.004 0.018 16
83 1245 0.3 0.022 0.246 0.018 0.004 0.018 16
84 1260 0.2 0.015 0.243 0.012 0.003 0.012 11
85 1275 0.3 0.022 0.240 0.018 0.004 0.018 16
86 1290 0.2 0.015 0.238 0.012 0.003 0.012 11
87 1305 0.3 0.022 0.235 0.018 0.004 0.018 16
88 1320 0.2 0.015 0.233 0.012 0.003 0.012 11
89 1335 0.3 0.022 0.230 0.018 0.004 0.018 16
90 1350 0.2 0.015 0.228 0.012 0.003 0.012 11
91 1365 0.2 0.015 0.226 0.012 0.003 0.012 11
92 1380 0.2 0.015 0.224 0.012 0.003 0.012 11
93 1395 0.2 0.015 0.223 0.012 0.003 0.012 11
94 1410 0.2 0.015 0.221 0.012 0.003 0.012 11
95 1425

0.2 0.015 0.220 0.012 0.003 0.012 11
96 1440 0.2 0.015 0.220 0.012 0.003 0.012 11
97 1455 0.000 0

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Pre‐Development ‐ POD‐3B
Area: 1.609 acres Per Hydrology Map (to use in this report) Pervious B: 0.000 acres
Pervious C: 0.207 acres
Pervious D: 1.402 acres
% perv B: 0.0% Soil Type: B/C/D
% perv C: 12.9%
% perv D: 87.1%
% imperv: 0.0% RI
(Plate D‐5.5): 69/80/85 (Open Brush/Grass/Chapparal ‐ Fair) RI (Plate D‐5.5): 90 (impervious)
RI: AMC‐I AMC‐II AMC‐III
69 0.57 0.375 0.190 (Plate E‐6.2)
80 0.44 0.25 0.115 (Plate E‐6.2)
85 0.36 0.185 0.080
Weighted 0.37 0.19 0.08
Synthetic Unit Hydrograph
Pre‐Development Determination (Flowline of lot)
n: 0.03 (interpretation of Plate E.3)
L: 333 ft 0.063 miles
Lca: 180 ft 0.034 miles
U/S: 1607 ft
D/S: 1584 ft
s: 0.0691 ft/ft 364.7 ft/mile
tlag: 1.36 min
∆t (3hr, 6hr): 5 min
∆t (24hr): 15 min
As tlag < 5 ‐ 7 min, Short Cut Hydrograph Method Used.

Pre‐Development ‐ POD‐3B
Return Period: 2 yr Low Loss Rate %: 80%
Duration of Rain: 24 hr % impervious: 0.0%
Rainfall: 1.83 inches Fp (AMC‐I): 0.37 in/hr
Area: 1.61 acres Constant loss rate, F: 0.370 in/hr
Fm (as a % of F): 0.500
Volume: 2137 cu‐ft Peak: 0.08 cfs
Period Time Pattern % Intensity Max Loss Low Effective TOTAL Volume (min) (in/hr) (in/hr) (in/hr) (in/hr) (cfs) (cf)
0 0.000 0
1 15 0.2 0.015 0.654 0.012 0.003 0.005 4
2 30 0.3 0.022 0.646 0.018 0.004 0.007 6
3 45 0.3 0.022 0.639 0.018 0.004 0.007 6
4 60 0.4 0.029 0.631 0.023 0.006 0.009 9
5 75 0.3 0.022 0.624 0.018 0.004 0.007 6
6 90 0.3 0.022 0.616 0.018 0.004 0.007 6
7 105 0.3 0.022 0.609 0.018 0.004 0.007 6
8 120 0.4 0.029 0.602 0.023 0.006 0.009 9
9 135 0.4 0.029 0.594 0.023 0.006 0.009 9
10 150 0.4 0.029 0.587 0.023 0.006 0.009 9
11 165 0.5 0.037 0.580 0.029 0.007 0.012 11
12 180 0.5 0.037 0.573 0.029 0.007 0.012 11
13 195 0.5 0.037 0.566 0.029 0.007 0.012 11
14 210 0.5 0.037 0.559 0.029 0.007 0.012 11
15 225 0.5 0.037 0.552 0.029 0.007 0.012 11
16 240 0.6 0.044 0.545 0.035 0.009 0.014 13
17 255 0.6 0.044 0.538 0.035 0.009 0.014 13
18 270 0.7 0.051 0.531 0.041 0.010 0.017 15
19 285 0.7 0.051 0.524 0.041 0.010 0.017 15
20 300 0.8 0.059 0.517 0.047 0.012 0.019 17
21 315 0.6 0.044 0.511 0.035 0.009 0.014 13
22 330 0.7 0.051 0.504 0.041 0.010 0.017 15
23 345 0.8 0.059 0.498 0.047 0.012 0.019 17
24 360 0.8 0.059 0.491 0.047 0.012 0.019 17
25 375 0.9 0.066 0.484 0.053 0.013 0.021 19
26 390 0.9 0.066 0.478 0.053 0.013 0.021 19
27 405 1 0.073 0.472 0.059 0.015 0.024 21
28 420 1 0.073 0.465 0.059 0.015 0.024 21
29 435 1 0.073 0.459 0.059 0.015 0.024 21
30 450 1.1 0.081 0.453 0.064 0.016 0.026 24
31 465 1.2 0.088 0.446 0.070 0.018 0.028 26
32 480 1.3 0.095 0.440 0.076 0.019 0.031 28
33 495 1.5 0.110 0.434 0.088 0.022 0.036 32
34 510 1.5 0.110 0.428 0.088 0.022 0.036 32
35 525 1.6 0.117 0.422 0.094 0.023 0.038 34
36 540 1.7 0.124 0.416 0.100 0.025 0.040 36
37 555 1.9 0.139 0.410 0.111 0.028 0.045 41
38 570 2 0.146 0.404 0.117 0.029 0.047 43
39 585 2.1 0.154 0.399 0.123 0.031 0.050 45
40 600 2.2 0.161 0.393 0.129 0.032 0.052 47
41 615 1.5 0.110 0.387 0.088 0.022 0.036 32
42 630 1.5 0.110 0.382 0.088 0.022 0.036 32
43 645 2 0.146 0.376 0.117 0.029 0.047 43
44 660 2 0.146 0.371 0.117 0.029 0.047 43
45 675 1.9 0.139 0.365 0.111 0.028 0.045 41
46 690 1.9 0.139 0.360 0.111 0.028 0.045 41
47 705 1.7 0.124 0.354 0.100 0.025 0.040 36
48 720 1.8 0.132 0.349 0.105 0.026 0.043 38
49 735 2.5 0.183 0.344 0.146 0.037 0.059 53
50 750 2.6 0.190 0.339 0.152 0.038 0.062 56
51 765 2.8 0.205 0.334 0.164 0.041 0.066 60
52 780 2.9 0.212 0.329 0.170 0.042 0.069 62
53 795 3.4 0.249 0.324 0.199 0.050 0.081 73
54 810 3.4 0.249 0.319 0.199 0.050 0.081 73
55 825 2.3 0.168 0.314 0.135 0.034 0.055 49
56 840 2.3 0.168 0.309 0.135 0.034 0.055 49
57 855 2.7 0.198 0.304 0.158 0.040 0.064 58
58 870 2.6 0.190 0.300 0.152 0.038 0.062 56
59 885 2.6 0.190 0.295 0.152 0.038 0.062 56
60 900 2.5 0.183 0.291 0.146 0.037 0.059 53
61 915 2.4 0.176 0.286 0.141 0.035 0.057 51
62 930 2.3 0.168 0.282 0.135 0.034 0.055 49
63 945 1.9 0.139 0.278 0.111 0.028 0.045 41
64 960 1.9 0.139 0.273 0.111 0.028 0.045 41
65 975 0.4 0.029 0.269 0.023 0.006 0.009 9
66 990 0.4 0.029 0.265 0.023 0.006 0.009 9
67 1005 0.3 0.022 0.261 0.018 0.004 0.007 6
68 1020 0.3 0.022 0.257 0.018 0.004 0.007 6
69 1035 0.5 0.037 0.253 0.029 0.007 0.012 11
70 1050 0.5 0.037 0.249 0.029 0.007 0.012 11
71 1065 0.5 0.037 0.246 0.029 0.007 0.012 11
72 1080 0.4 0.029 0.242 0.023 0.006 0.009 9
73 1095 0.4 0.029 0.238 0.023 0.006 0.009 9
74 1110 0.4 0.029 0.235 0.023 0.006 0.009 9
75 1125 0.3 0.022 0.232 0.018 0.004 0.007 6
76 1140 0.2 0.015 0.228 0.012 0.003 0.005 4
77 1155 0.3 0.022 0.225 0.018 0.004 0.007 6
78 1170 0.4 0.029 0.222 0.023 0.006 0.009 9
79 1185 0.3 0.022 0.219 0.018 0.004 0.007 6
80 1200 0.2 0.015 0.216 0.012 0.003 0.005 4
81 1215 0.3 0.022 0.213 0.018 0.004 0.007 6
82 1230 0.3 0.022 0.210 0.018 0.004 0.007 6
83 1245 0.3 0.022 0.208 0.018 0.004 0.007 6
84 1260 0.2 0.015 0.205 0.012 0.003 0.005 4
85 1275 0.3 0.022 0.203 0.018 0.004 0.007 6
86 1290 0.2 0.015 0.200 0.012 0.003 0.005 4
87 1305 0.3 0.022 0.198 0.018 0.004 0.007 6
88 1320 0.2 0.015 0.196 0.012 0.003 0.005 4
89 1335 0.3 0.022 0.194 0.018 0.004 0.007 6
90 1350 0.2 0.015 0.192 0.012 0.003 0.005 4
91 1365 0.2 0.015 0.191 0.012 0.003 0.005 4
92 1380 0.2 0.015 0.189 0.012 0.003 0.005 4
93 1395 0.2 0.015 0.188 0.012 0.003 0.005 4
94 1410 0.2 0.015 0.187 0.012 0.003 0.005 4
95 1425

0.2 0.015 0.186 0.012 0.003 0.005 4
96 1440 0.2 0.015 0.185 0.012 0.003 0.005 4
97 1455 0.000 0

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Pre‐Development ‐ POD‐4
Area: 12.122 acres Per Hydrology Map (to use in this report) Pervious B: 0.000 acres
Pervious C: 12.070 acres
Pervious D: 0.051 acres
% perv B: 0.0% Soil Type: B/C
% perv C: 99.6%
% perv D: 0.4%
% imperv: 0.0% RI
(Plate D‐5.5): 69/80 (Open Brush/Grass/Chapparal ‐ Fair) RI (Plate D‐5.5): 90 (impervious)
RI: AMC‐I AMC‐II AMC‐III
69 0.57 0.375 0.190 (Plate E‐6.2)
80 0.44 0.25 0.115 (Plate E‐6.2)
85 0.36 0.185 0.080 (Plate E‐6.2)
Weighted 0.44 0.25 0.11
Synthetic Unit Hydrograph
Pre‐Development Determination (Flowline of area)
n: 0.03 (interpretation of Plate E.3)
L: 1213 ft 0.230 miles
Lca: 604 ft 0.114 miles
U/S: 1591 ft
D/S: 1568 ft
s: 0.0190 ft/ft 100.1 ft/mile
tlag: 4.52 min
∆t (3hr, 6hr): 5 min
∆t (24hr): 15 min
As tlag < 5 ‐ 7 min, Short Cut Hydrograph Method Used.

Pre‐Development ‐ POD‐4
Return Period: 2 yr Low Loss Rate %: 80%
Duration of Rain: 24 hr % impervious: 0.0%
Rainfall: 1.83 inches Fp (AMC‐I): 0.44 in/hr
Area: 12.12 acres Constant loss rate, F: 0.440 in/hr
Fm (as a % of F): 0.500
Volume: 16104 cu ‐ft Peak: 0.61 cfs
Period Time Pattern % Intensity Max Loss Low Effective TOTAL Volume (min) (in/hr) (in/hr) (in/hr) (in/hr) (cfs) (cf)
0 0.000 0
1 15 0.2 0.015 0.776 0.012 0.003 0.036 32
2 30 0.3 0.022 0.767 0.018 0.004 0.054 48
3 45 0.3 0.022 0.758 0.018 0.004 0.054 48
4 60 0.4 0.029 0.750 0.023 0.006 0.072 64
5 75 0.3 0.022 0.741 0.018 0.004 0.054 48
6 90 0.3 0.022 0.732 0.018 0.004 0.054 48
7 105 0.3 0.022 0.723 0.018 0.004 0.054 48
8 120 0.4 0.029 0.714 0.023 0.006 0.072 64
9 135 0.4 0.029 0.706 0.023 0.006 0.072 64
10 150 0.4 0.029 0.697 0.023 0.006 0.072 64
11 165 0.5 0.037 0.689 0.029 0.007 0.089 81
12 180 0.5 0.037 0.680 0.029 0.007 0.089 81
13 195 0.5 0.037 0.672 0.029 0.007 0.089 81
14 210 0.5 0.037 0.663 0.029 0.007 0.089 81
15 225 0.5 0.037 0.655 0.029 0.007 0.089 81
16 240 0.6 0.044 0.647 0.035 0.009 0.107 97
17 255 0.6 0.044 0.639 0.035 0.009 0.107 97
18 270 0.7 0.051 0.631 0.041 0.010 0.125 113
19 285 0.7 0.051 0.622 0.041 0.010 0.125 113
20 300 0.8 0.059 0.614 0.047 0.012 0.143 129
21 315 0.6 0.044 0.606 0.035 0.009 0.107 97
22 330 0.7 0.051 0.599 0.041 0.010 0.125 113
23 345 0.8 0.059 0.591 0.047 0.012 0.143 129
24 360 0.8 0.059 0.583 0.047 0.012 0.143 129
25 375 0.9 0.066 0.575 0.053 0.013 0.161 145
26 390 0.9 0.066 0.568 0.053 0.013 0.161 145
27 405 1 0.073 0.560 0.059 0.015 0.179 161
28 420 1 0.073 0.552 0.059 0.015 0.179 161
29 435 1 0.073 0.545 0.059 0.015 0.179 161
30 450 1.1 0.081 0.537 0.064 0.016 0.197 177
31 465 1.2 0.088 0.530 0.070 0.018 0.215 193
32 480 1.3 0.095 0.523 0.076 0.019 0.233 209
33 495 1.5 0.110 0.515 0.088 0.022 0.268 242
34 510 1.5 0.110 0.508 0.088 0.022 0.268 242
35 525 1.6 0.117 0.501 0.094 0.023 0.286 258
36 540 1.7 0.124 0.494 0.100 0.025 0.304 274
37 555 1.9 0.139 0.487 0.111 0.028 0.340 306
38 570 2 0.146 0.480 0.117 0.029 0.358 322
39 585 2.1 0.154 0.473 0.123 0.031 0.376 338
40 600 2.2 0.161 0.467 0.129 0.032 0.394 354
41 615 1.5 0.110 0.460 0.088 0.022 0.268 242
42 630 1.5 0.110 0.453 0.088 0.022 0.268 242
43 645 2 0.146 0.447 0.117 0.029 0.358 322
44 660 2 0.146 0.440 0.117 0.029 0.358 322
45 675 1.9 0.139 0.434 0.111 0.028 0.340 306
46 690 1.9 0.139 0.427 0.111 0.028 0.340 306
47 705 1.7 0.124 0.421 0.100 0.025 0.304 274
48 720 1.8 0.132 0.415 0.105 0.026 0.322 290
49 735 2.5 0.183 0.408 0.146 0.037 0.447 403
50 750 2.6 0.190 0.402 0.152 0.038 0.465 419
51 765 2.8 0.205 0.396 0.164 0.041 0.501 451
52 780 2.9 0.212 0.390 0.170 0.042 0.519 467
53 795 3.4 0.249 0.384 0.199 0.050 0.608 548
54 810 3.4 0.249 0.379 0.199 0.050 0.608 548
55 825 2.3 0.168 0.373 0.135 0.034 0.412 370
56 840 2.3 0.168 0.367 0.135 0.034 0.412 370
57 855 2.7 0.198 0.361 0.158 0.040 0.483 435
58 870 2.6 0.190 0.356 0.152 0.038 0.465 419
59 885 2.6 0.190 0.351 0.152 0.038 0.465 419
60 900 2.5 0.183 0.345 0.146 0.037 0.447 403
61 915 2.4 0.176 0.340 0.141 0.035 0.429 387
62 930 2.3 0.168 0.335 0.135 0.034 0.412 370
63 945 1.9 0.139 0.330 0.111 0.028 0.340 306
64 960 1.9 0.139 0.325 0.111 0.028 0.340 306
65 975 0.4 0.029 0.320 0.023 0.006 0.072 64
66 990 0.4 0.029 0.315 0.023 0.006 0.072 64
67 1005 0.3 0.022 0.310 0.018 0.004 0.054 48
68 1020 0.3 0.022 0.305 0.018 0.004 0.054 48
69 1035 0.5 0.037 0.301 0.029 0.007 0.089 81
70 1050 0.5 0.037 0.296 0.029 0.007 0.089 81
71 1065 0.5 0.037 0.292 0.029 0.007 0.089 81
72 1080 0.4 0.029 0.287 0.023 0.006 0.072 64
73 1095 0.4 0.029 0.283 0.023 0.006 0.072 64
74 1110 0.4 0.029 0.279 0.023 0.006 0.072 64
75 1125 0.3 0.022 0.275 0.018 0.004 0.054 48
76 1140 0.2 0.015 0.271 0.012 0.003 0.036 32
77 1155 0.3 0.022 0.267 0.018 0.004 0.054 48
78 1170 0.4 0.029 0.264 0.023 0.006 0.072 64
79 1185 0.3 0.022 0.260 0.018 0.004 0.054 48
80 1200 0.2 0.015 0.256 0.012 0.003 0.036 32
81 1215 0.3 0.022 0.253 0.018 0.004 0.054 48
82 1230 0.3 0.022 0.250 0.018 0.004 0.054 48
83 1245 0.3 0.022 0.247 0.018 0.004 0.054 48
84 1260 0.2 0.015 0.244 0.012 0.003 0.036 32
85 1275 0.3 0.022 0.241 0.018 0.004 0.054 48
86 1290 0.2 0.015 0.238 0.012 0.003 0.036 32
87 1305 0.3 0.022 0.235 0.018 0.004 0.054 48
88 1320 0.2 0.015 0.233 0.012 0.003 0.036 32
89 1335 0.3 0.022 0.231 0.018 0.004 0.054 48
90 1350 0.2 0.015 0.228 0.012 0.003 0.036 32
91 1365 0.2 0.015 0.227 0.012 0.003 0.036 32
92 1380 0.2 0.015 0.225 0.012 0.003 0.036 32
93 1395 0.2 0.015 0.223 0.012 0.003 0.036 32
94 1410 0.2 0.015 0.222 0.012 0.003 0.036 32
95 1425

0.2 0.015 0.221 0.012 0.003 0.036 32
96 1440 0.2 0.015 0.220 0.012 0.003 0.036 32
97 1455 0.000 0

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Sycamore Hills Business Center
HMP Analysis

APPENDIX 5: POST-DEVEL OPMENT INFORMATION

• AREAS, % IMPERVIOUS

• RI, INFILTRATION

• TLAG

• POST-DEV. SHORT CUT SYNTHETIC HYDROGRAPH RESULTS FOR
ANALYZED STORMS AND PODs 2, 3A, 3B, and 4.

Sycamore Hills Business Center
Drainage Study

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Post-Development - DMA-2ACD (POD-2)
Area: 4.657 acres Per Hydrology Map (to use in this report) Pervious B: 0.319 acres
Pervious C: 0.215 acres
Pervious D: 0.039 acres
% perv B: 6.8% Soil Type: B/C/D
% perv C: 4.6%
% perv D: 0.8%
% imperv: 87.7% RI (Plate D-5.5): 56/69/75 (Commercial Landscaping) RI (Plate D-5.5): 90 (impervious)
RI: AMC-I AMC-II AMC-III
56 0.68 0.48 0.28 (Plate E-6.2)
69 0.58 0.37 0.19 (Plate E-6.2)
75 0.50 0.30 0.15 (Plate E-6.2)
Weighted 0.63 0.43 0.24
Synthetic Unit Hydrograph
Post-Development Determination (Centerline of Parking lot) n: 0.013 (interpretation of Plate E.3)
L: 270 ft 0.051 miles
Lca: 100 ft 0.019 miles
U/S: 1612 ft
D/S: 1600 ft
s: 0.0444 ft/ft 234.7 ft/mile
tlag: 0.47 min
∆t (3hr, 6hr): 5 min
∆t (24hr): 15 min
As tlag < 5 - 7 min, Short Cut Hydrograph Method Used.

Post-Development - DMA-2ACD (POD-2)
Return Period: 2 yr Low Loss Rate %: 19%
Duration of Rain: 24 hr % impervious: 87.7%
Rainfall: 1.83 inches Fp (AMC-I): 0.63 in/hr
Area: 4.66 acres Constant loss rate, F: 0.133 in/hr
Fm (as a % of F): 0.500
Volume: 25183 cu-ft Peak: 0.95 cfs
Period Time Pattern % Intensity Max Loss Low Effective TOTAL Volume (min) (in/hr) (in/hr) (in/hr) (in/hr) (cfs) (cf)
0 0.000 0
1 15 0.2 0.015 0.234 0.003 0.012 0.056 50
2 30 0.3 0.022 0.232 0.004 0.018 0.084 76
3 45 0.3 0.022 0.229 0.004 0.018 0.084 76
4 60 0.4 0.029 0.226 0.005 0.024 0.112 101
5 75 0.3 0.022 0.224 0.004 0.018 0.084 76
6 90 0.3 0.022 0.221 0.004 0.018 0.084 76
7 105 0.3 0.022 0.218 0.004 0.018 0.084 76
8 120 0.4 0.029 0.216 0.005 0.024 0.112 101
9 135 0.4 0.029 0.213 0.005 0.024 0.112 101
10 150 0.4 0.029 0.210 0.005 0.024 0.112 101
11 165 0.5 0.037 0.208 0.007 0.030 0.140 126
12 180 0.5 0.037 0.205 0.007 0.030 0.140 126
13 195 0.5 0.037 0.203 0.007 0.030 0.140 126
14 210 0.5 0.037 0.200 0.007 0.030 0.140 126
15 225 0.5 0.037 0.198 0.007 0.030 0.140 126
16 240 0.6 0.044 0.195 0.008 0.036 0.168 151
17 255 0.6 0.044 0.193 0.008 0.036 0.168 151
18 270 0.7 0.051 0.190 0.010 0.042 0.196 176
19 285 0.7 0.051 0.188 0.010 0.042 0.196 176
20 300 0.8 0.059 0.185 0.011 0.048 0.224 201
21 315 0.6 0.044 0.183 0.008 0.036 0.168 151
22 330 0.7 0.051 0.181 0.010 0.042 0.196 176
23 345 0.8 0.059 0.178 0.011 0.048 0.224 201
24 360 0.8 0.059 0.176 0.011 0.048 0.224 201
25 375 0.9 0.066 0.174 0.012 0.054 0.252 227
26 390 0.9 0.066 0.171 0.012 0.054 0.252 227
27 405 1 0.073 0.169 0.014 0.060 0.280 252
28 420 1 0.073 0.167 0.014 0.060 0.280 252
29 435 1 0.073 0.164 0.014 0.060 0.280 252
30 450 1.1 0.081 0.162 0.015 0.066 0.308 277
31 465 1.2 0.088 0.160 0.016 0.071 0.336 302
32 480 1.3 0.095 0.158 0.018 0.077 0.364 327
33 495 1.5 0.110 0.156 0.020 0.089 0.420 378
34 510 1.5 0.110 0.153 0.020 0.089 0.420 378
35 525 1.6 0.117 0.151 0.022 0.095 0.448 403
36 540 1.7 0.124 0.149 0.023 0.101 0.476 428
37 555 1.9 0.139 0.147 0.026 0.113 0.532 478
38 570 2 0.146 0.145 0.027 0.119 0.560 504
39 585 2.1 0.154 0.143 0.029 0.125 0.588 529
40 600 2.2 0.161 0.141 0.030 0.131 0.616 554
41 615 1.5 0.110 0.139 0.020 0.089 0.420 378
42 630 1.5 0.110 0.137 0.020 0.089 0.420 378
43 645 2 0.146 0.135 0.027 0.119 0.560 504
44 660 2 0.146 0.133 0.027 0.119 0.560 504
45 675 1.9 0.139 0.131 0.026 0.113 0.532 478
46 690 1.9 0.139 0.129 0.026 0.113 0.532 478
47 705 1.7 0.124 0.127 0.023 0.101 0.476 428
48 720 1.8 0.132 0.125 0.025 0.107 0.504 453
49 735 2.5 0.183 0.123 0.034 0.149 0.700 630
50 750 2.6 0.190 0.121 0.035 0.155 0.728 655
51 765 2.8 0.205 0.120 0.038 0.167 0.783 705
52 780 2.9 0.212 0.118 0.039 0.173 0.811 730
53 795 3.4 0.249 0.116 0.046 0.203 0.951 856
54 810 3.4 0.249 0.114 0.046 0.203 0.951 856
55 825 2.3 0.168 0.113 0.031 0.137 0.644 579
56 840 2.3 0.168 0.111 0.031 0.137 0.644 579
57 855 2.7 0.198 0.109 0.037 0.161 0.755 680
58 870 2.6 0.190 0.107 0.035 0.155 0.728 655
59 885 2.6 0.190 0.106 0.035 0.155 0.728 655
60 900 2.5 0.183 0.104 0.034 0.149 0.700 630
61 915 2.4 0.176 0.103 0.033 0.143 0.672 604
62 930 2.3 0.168 0.101 0.031 0.137 0.644 579
63 945 1.9 0.139 0.099 0.026 0.113 0.532 478
64 960 1.9 0.139 0.098 0.026 0.113 0.532 478
65 975 0.4 0.029 0.096 0.005 0.024 0.112 101
66 990 0.4 0.029 0.095 0.005 0.024 0.112 101
67 1005 0.3 0.022 0.094 0.004 0.018 0.084 76
68 1020 0.3 0.022 0.092 0.004 0.018 0.084 76
69 1035 0.5 0.037 0.091 0.007 0.030 0.140 126
70 1050 0.5 0.037 0.089 0.007 0.030 0.140 126
71 1065 0.5 0.037 0.088 0.007 0.030 0.140 126
72 1080 0.4 0.029 0.087 0.005 0.024 0.112 101
73 1095 0.4 0.029 0.085 0.005 0.024 0.112 101
74 1110 0.4 0.029 0.084 0.005 0.024 0.112 101
75 1125 0.3 0.022 0.083 0.004 0.018 0.084 76
76 1140 0.2 0.015 0.082 0.003 0.012 0.056 50
77 1155 0.3 0.022 0.081 0.004 0.018 0.084 76
78 1170 0.4 0.029 0.080 0.005 0.024 0.112 101
79 1185 0.3 0.022 0.078 0.004 0.018 0.084 76
80 1200 0.2 0.015 0.077 0.003 0.012 0.056 50
81 1215 0.3 0.022 0.076 0.004 0.018 0.084 76
82 1230 0.3 0.022 0.075 0.004 0.018 0.084 76
83 1245 0.3 0.022 0.074 0.004 0.018 0.084 76
84 1260 0.2 0.015 0.074 0.003 0.012 0.056 50
85 1275 0.3 0.022 0.073 0.004 0.018 0.084 76
86 1290 0.2 0.015 0.072 0.003 0.012 0.056 50
87 1305 0.3 0.022 0.071 0.004 0.018 0.084 76
88 1320 0.2 0.015 0.070 0.003 0.012 0.056 50
89 1335 0.3 0.022 0.070 0.004 0.018 0.084 76
90 1350 0.2 0.015 0.069 0.003 0.012 0.056 50
91 1365 0.2 0.015 0.068 0.003 0.012 0.056 50
92 1380 0.2 0.015 0.068 0.003 0.012 0.056 50
93 1395 0.2 0.015 0.067 0.003 0.012 0.056 50
94 1410 0.2 0.015 0.067 0.003 0.012 0.056 50
95 1425 0.2 0.015 0.067 0.003 0.012 0.056 50
96 1440 0.2 0.015 0.066 0.003 0.012 0.056 50
97 1455 0.000 0
Sycamore Hills Business Center
Drainage Study

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Post-Development - DMA-2B (POD-2)
Area: 5.848 acres Per Hydrology Map (to use in this report) Pervious B: 0.434 acres
Pervious C: 0.177 acres
Pervious D: 0.000 acres
% perv B: 7.4% Soil Type: B/C/D
% perv C: 3.0%
% perv D: 0.0%
% imperv: 89.6% RI (Plate D-5.5): 56/69/75 (Commercial Landscaping) RI (Plate D-5.5): 90 (impervious)
RI: AMC-I AMC-II AMC-III
56 0.68 0.48 0.28 (Plate E-6.2)
69 0.58 0.37 0.19 (Plate E-6.2)
75 0.50 0.30 0.15 (Plate E-6.2)
Weighted 0.65 0.45 0.25
Synthetic Unit Hydrograph
Post-Development Determination (Centerline of Parking lot) n: 0.013 (interpretation of Plate E.3)
L: 270 ft 0.051 miles
Lca: 100 ft 0.019 miles
U/S: 1612 ft
D/S: 1600 ft
s: 0.0444 ft/ft 234.7 ft/mile
tlag: 0.47 min
∆t (3hr, 6hr): 5 min
∆t (24hr): 15 min
As tlag < 5 - 7 min, Short Cut Hydrograph Method Used.

Post-Development - DMA-2B (POD-2)
Return Period: 2 yr Low Loss Rate %: 17%
Duration of Rain: 24 hr % impervious: 89.6%
Rainfall: 1.83 inches Fp (AMC-I): 0.65 in/hr
Area: 5.85 acres Constant loss rate, F: 0.126 in/hr
Fm (as a % of F): 0.500
Volume: 32122 cu-ft Peak: 1.21 cfs
Period Time Pattern % Intensity Max Loss Low Effective TOTAL Volume (min) (in/hr) (in/hr) (in/hr) (in/hr) (cfs) (cf)
0 0.000 0
1 15 0.2 0.015 0.223 0.003 0.012 0.071 64
2 30 0.3 0.022 0.220 0.004 0.018 0.107 96
3 45 0.3 0.022 0.218 0.004 0.018 0.107 96
4 60 0.4 0.029 0.215 0.005 0.024 0.143 128
5 75 0.3 0.022 0.213 0.004 0.018 0.107 96
6 90 0.3 0.022 0.210 0.004 0.018 0.107 96
7 105 0.3 0.022 0.208 0.004 0.018 0.107 96
8 120 0.4 0.029 0.205 0.005 0.024 0.143 128
9 135 0.4 0.029 0.203 0.005 0.024 0.143 128
10 150 0.4 0.029 0.200 0.005 0.024 0.143 128
11 165 0.5 0.037 0.198 0.006 0.030 0.178 161
12 180 0.5 0.037 0.195 0.006 0.030 0.178 161
13 195 0.5 0.037 0.193 0.006 0.030 0.178 161
14 210 0.5 0.037 0.191 0.006 0.030 0.178 161
15 225 0.5 0.037 0.188 0.006 0.030 0.178 161
16 240 0.6 0.044 0.186 0.008 0.036 0.214 193
17 255 0.6 0.044 0.184 0.008 0.036 0.214 193
18 270 0.7 0.051 0.181 0.009 0.042 0.250 225
19 285 0.7 0.051 0.179 0.009 0.042 0.250 225
20 300 0.8 0.059 0.177 0.010 0.048 0.286 257
21 315 0.6 0.044 0.174 0.008 0.036 0.214 193
22 330 0.7 0.051 0.172 0.009 0.042 0.250 225
23 345 0.8 0.059 0.170 0.010 0.048 0.286 257
24 360 0.8 0.059 0.167 0.010 0.048 0.286 257
25 375 0.9 0.066 0.165 0.011 0.054 0.321 289
26 390 0.9 0.066 0.163 0.011 0.054 0.321 289
27 405 1 0.073 0.161 0.013 0.061 0.357 321
28 420 1 0.073 0.159 0.013 0.061 0.357 321
29 435 1 0.073 0.157 0.013 0.061 0.357 321
30 450 1.1 0.081 0.154 0.014 0.067 0.393 353
31 465 1.2 0.088 0.152 0.015 0.073 0.428 385
32 480 1.3 0.095 0.150 0.016 0.079 0.464 418
33 495 1.5 0.110 0.148 0.019 0.091 0.535 482
34 510 1.5 0.110 0.146 0.019 0.091 0.535 482
35 525 1.6 0.117 0.144 0.020 0.097 0.571 514
36 540 1.7 0.124 0.142 0.022 0.103 0.607 546
37 555 1.9 0.139 0.140 0.024 0.115 0.678 610
38 570 2 0.146 0.138 0.025 0.121 0.714 642
39 585 2.1 0.154 0.136 0.027 0.127 0.750 675
40 600 2.2 0.161 0.134 0.028 0.133 0.785 707
41 615 1.5 0.110 0.132 0.019 0.091 0.535 482
42 630 1.5 0.110 0.130 0.019 0.091 0.535 482
43 645 2 0.146 0.128 0.025 0.121 0.714 642
44 660 2 0.146 0.126 0.025 0.121 0.714 642
45 675 1.9 0.139 0.125 0.024 0.115 0.678 610
46 690 1.9 0.139 0.123 0.024 0.115 0.678 610
47 705 1.7 0.124 0.121 0.022 0.103 0.607 546
48 720 1.8 0.132 0.119 0.023 0.109 0.642 578
49 735 2.5 0.183 0.117 0.032 0.151 0.892 803
50 750 2.6 0.190 0.116 0.033 0.157 0.928 835
51 765 2.8 0.205 0.114 0.035 0.169 0.999 899
52 780 2.9 0.212 0.112 0.037 0.176 1.035 932
53 795 3.4 0.249 0.110 0.043 0.206 1.213 1092
54 810 3.4 0.249 0.109 0.043 0.206 1.213 1092
55 825 2.3 0.168 0.107 0.029 0.139 0.821 739
56 840 2.3 0.168 0.105 0.029 0.139 0.821 739
57 855 2.7 0.198 0.104 0.034 0.163 0.964 867
58 870 2.6 0.190 0.102 0.033 0.157 0.928 835
59 885 2.6 0.190 0.101 0.033 0.157 0.928 835
60 900 2.5 0.183 0.099 0.032 0.151 0.892 803
61 915 2.4 0.176 0.098 0.030 0.145 0.857 771
62 930 2.3 0.168 0.096 0.029 0.139 0.821 739
63 945 1.9 0.139 0.095 0.024 0.115 0.678 610
64 960 1.9 0.139 0.093 0.024 0.115 0.678 610
65 975 0.4 0.029 0.092 0.005 0.024 0.143 128
66 990 0.4 0.029 0.090 0.005 0.024 0.143 128
67 1005 0.3 0.022 0.089 0.004 0.018 0.107 96
68 1020 0.3 0.022 0.088 0.004 0.018 0.107 96
69 1035 0.5 0.037 0.086 0.006 0.030 0.178 161
70 1050 0.5 0.037 0.085 0.006 0.030 0.178 161
71 1065 0.5 0.037 0.084 0.006 0.030 0.178 161
72 1080 0.4 0.029 0.083 0.005 0.024 0.143 128
73 1095 0.4 0.029 0.081 0.005 0.024 0.143 128
74 1110 0.4 0.029 0.080 0.005 0.024 0.143 128
75 1125 0.3 0.022 0.079 0.004 0.018 0.107 96
76 1140 0.2 0.015 0.078 0.003 0.012 0.071 64
77 1155 0.3 0.022 0.077 0.004 0.018 0.107 96
78 1170 0.4 0.029 0.076 0.005 0.024 0.143 128
79 1185 0.3 0.022 0.075 0.004 0.018 0.107 96
80 1200 0.2 0.015 0.074 0.003 0.012 0.071 64
81 1215 0.3 0.022 0.073 0.004 0.018 0.107 96
82 1230 0.3 0.022 0.072 0.004 0.018 0.107 96
83 1245 0.3 0.022 0.071 0.004 0.018 0.107 96
84 1260 0.2 0.015 0.070 0.003 0.012 0.071 64
85 1275 0.3 0.022 0.069 0.004 0.018 0.107 96
86 1290 0.2 0.015 0.068 0.003 0.012 0.071 64
87 1305 0.3 0.022 0.068 0.004 0.018 0.107 96
88 1320 0.2 0.015 0.067 0.003 0.012 0.071 64
89 1335 0.3 0.022 0.066 0.004 0.018 0.107 96
90 1350 0.2 0.015 0.066 0.003 0.012 0.071 64
91 1365 0.2 0.015 0.065 0.003 0.012 0.071 64
92 1380 0.2 0.015 0.065 0.003 0.012 0.071 64
93 1395 0.2 0.015 0.064 0.003 0.012 0.071 64
94 1410 0.2 0.015 0.064 0.003 0.012 0.071 64
95 1425 0.2 0.015 0.063 0.003 0.012 0.071 64
96 1440 0.2 0.015 0.063 0.003 0.012 0.071 64
97 1455 0.000 0
Sycamore Hills Business Center
Drainage Study

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Post-Development - POD-3A
Area: 4.565 acres Per Hydrology Map (to use in this report) Pervious B: 0.000 acres
Pervious C: 0.000 acres
Pervious D: 0.269 acres
% perv B: 0.0% Soil Type: B/C/D
% perv C: 0.0%
% perv D: 5.9%
% imperv: 94.1% RI (Plate D-5.5): 56/69/75 (Commercial Landscaping) RI (Plate D-5.5): 90 (impervious)
RI: AMC-I AMC-II AMC-III
56 0.68 0.48 0.28 (Plate E-6.2)
69 0.58 0.37 0.19 (Plate E-6.2)
75 0.50 0.30 0.15 (Plate E-6.2)
Weighted 0.50 0.30 0.15
Synthetic Unit Hydrograph
Post-Development Determination (Centerline of Parking lot) n: 0.013 (interpretation of Plate E.3)
L: 270 ft 0.051 miles
Lca: 100 ft 0.019 miles
U/S: 1612 ft
D/S: 1600 ft
s: 0.0444 ft/ft 234.7 ft/mile
tlag: 0.47 min
∆t (3hr, 6hr): 5 min
∆t (24hr): 15 min
As tlag < 5 - 7 min, Short Cut Hydrograph Method Used.

Post-Development - POD-3A
Return Period: 2 yr Low Loss Rate %: 14%
Duration of Rain: 24 hr % impervious: 94.1%
Rainfall: 1.83 inches Fp (AMC-I): 0.50 in/hr
Area: 4.56 acres Constant loss rate, F: 0.077 in/hr
Fm (as a % of F): 0.500
Volume: 26040 cu-ft Peak: 0.98 cfs
Period Time Pattern % Intensity Max Loss Low Effective TOTAL Volume (min) (in/hr) (in/hr) (in/hr) (in/hr) (cfs) (cf)
0 0.000 0
1 15 0.2 0.015 0.135 0.002 0.013 0.058 52
2 30 0.3 0.022 0.134 0.003 0.019 0.087 78
3 45 0.3 0.022 0.132 0.003 0.019 0.087 78
4 60 0.4 0.029 0.130 0.004 0.025 0.116 104
5 75 0.3 0.022 0.129 0.003 0.019 0.087 78
6 90 0.3 0.022 0.127 0.003 0.019 0.087 78
7 105 0.3 0.022 0.126 0.003 0.019 0.087 78
8 120 0.4 0.029 0.124 0.004 0.025 0.116 104
9 135 0.4 0.029 0.123 0.004 0.025 0.116 104
10 150 0.4 0.029 0.121 0.004 0.025 0.116 104
11 165 0.5 0.037 0.120 0.005 0.031 0.145 130
12 180 0.5 0.037 0.118 0.005 0.031 0.145 130
13 195 0.5 0.037 0.117 0.005 0.031 0.145 130
14 210 0.5 0.037 0.115 0.005 0.031 0.145 130
15 225 0.5 0.037 0.114 0.005 0.031 0.145 130
16 240 0.6 0.044 0.113 0.006 0.038 0.174 156
17 255 0.6 0.044 0.111 0.006 0.038 0.174 156
18 270 0.7 0.051 0.110 0.007 0.044 0.203 182
19 285 0.7 0.051 0.108 0.007 0.044 0.203 182
20 300 0.8 0.059 0.107 0.008 0.050 0.231 208
21 315 0.6 0.044 0.106 0.006 0.038 0.174 156
22 330 0.7 0.051 0.104 0.007 0.044 0.203 182
23 345 0.8 0.059 0.103 0.008 0.050 0.231 208
24 360 0.8 0.059 0.101 0.008 0.050 0.231 208
25 375 0.9 0.066 0.100 0.009 0.057 0.260 234
26 390 0.9 0.066 0.099 0.009 0.057 0.260 234
27 405 1 0.073 0.097 0.010 0.063 0.289 260
28 420 1 0.073 0.096 0.010 0.063 0.289 260
29 435 1 0.073 0.095 0.010 0.063 0.289 260
30 450 1.1 0.081 0.094 0.011 0.069 0.318 286
31 465 1.2 0.088 0.092 0.012 0.075 0.347 312
32 480 1.3 0.095 0.091 0.013 0.082 0.376 339
33 495 1.5 0.110 0.090 0.016 0.094 0.434 391
34 510 1.5 0.110 0.088 0.016 0.094 0.434 391
35 525 1.6 0.117 0.087 0.017 0.101 0.463 417
36 540 1.7 0.124 0.086 0.018 0.107 0.492 443
37 555 1.9 0.139 0.085 0.020 0.119 0.550 495
38 570 2 0.146 0.084 0.021 0.126 0.579 521
39 585 2.1 0.154 0.082 0.022 0.132 0.608 547
40 600 2.2 0.161 0.081 0.023 0.138 0.637 573
41 615 1.5 0.110 0.080 0.016 0.094 0.434 391
42 630 1.5 0.110 0.079 0.016 0.094 0.434 391
43 645 2 0.146 0.078 0.021 0.126 0.579 521
44 660 2 0.146 0.077 0.021 0.126 0.579 521
45 675 1.9 0.139 0.075 0.020 0.119 0.550 495
46 690 1.9 0.139 0.074 0.020 0.119 0.550 495
47 705 1.7 0.124 0.073 0.018 0.107 0.492 443
48 720 1.8 0.132 0.072 0.019 0.113 0.521 469
49 735 2.5 0.183 0.071 0.026 0.157 0.723 651
50 750 2.6 0.190 0.070 0.027 0.163 0.752 677
51 765 2.8 0.205 0.069 0.029 0.176 0.810 729
52 780 2.9 0.212 0.068 0.030 0.182 0.839 755
53 795 3.4 0.249 0.067 0.035 0.214 0.984 885
54 810 3.4 0.249 0.066 0.035 0.214 0.984 885
55 825 2.3 0.168 0.065 0.024 0.145 0.665 599
56 840 2.3 0.168 0.064 0.024 0.145 0.665 599
57 855 2.7 0.198 0.063 0.028 0.170 0.781 703
58 870 2.6 0.190 0.062 0.027 0.163 0.752 677
59 885 2.6 0.190 0.061 0.027 0.163 0.752 677
60 900 2.5 0.183 0.060 0.026 0.157 0.723 651
61 915 2.4 0.176 0.059 0.025 0.151 0.694 625
62 930 2.3 0.168 0.058 0.024 0.145 0.665 599
63 945 1.9 0.139 0.057 0.020 0.119 0.550 495
64 960 1.9 0.139 0.056 0.020 0.119 0.550 495
65 975 0.4 0.029 0.056 0.004 0.025 0.116 104
66 990 0.4 0.029 0.055 0.004 0.025 0.116 104
67 1005 0.3 0.022 0.054 0.003 0.019 0.087 78
68 1020 0.3 0.022 0.053 0.003 0.019 0.087 78
69 1035 0.5 0.037 0.052 0.005 0.031 0.145 130
70 1050 0.5 0.037 0.052 0.005 0.031 0.145 130
71 1065 0.5 0.037 0.051 0.005 0.031 0.145 130
72 1080 0.4 0.029 0.050 0.004 0.025 0.116 104
73 1095 0.4 0.029 0.049 0.004 0.025 0.116 104
74 1110 0.4 0.029 0.049 0.004 0.025 0.116 104
75 1125 0.3 0.022 0.048 0.003 0.019 0.087 78
76 1140 0.2 0.015 0.047 0.002 0.013 0.058 52
77 1155 0.3 0.022 0.047 0.003 0.019 0.087 78
78 1170 0.4 0.029 0.046 0.004 0.025 0.116 104
79 1185 0.3 0.022 0.045 0.003 0.019 0.087 78
80 1200 0.2 0.015 0.045 0.002 0.013 0.058 52
81 1215 0.3 0.022 0.044 0.003 0.019 0.087 78
82 1230 0.3 0.022 0.043 0.003 0.019 0.087 78
83 1245 0.3 0.022 0.043 0.003 0.019 0.087 78
84 1260 0.2 0.015 0.042 0.002 0.013 0.058 52
85 1275 0.3 0.022 0.042 0.003 0.019 0.087 78
86 1290 0.2 0.015 0.041 0.002 0.013 0.058 52
87 1305 0.3 0.022 0.041 0.003 0.019 0.087 78
88 1320 0.2 0.015 0.041 0.002 0.013 0.058 52
89 1335 0.3 0.022 0.040 0.003 0.019 0.087 78
90 1350 0.2 0.015 0.040 0.002 0.013 0.058 52
91 1365 0.2 0.015 0.039 0.002 0.013 0.058 52
92 1380 0.2 0.015 0.039 0.002 0.013 0.058 52
93 1395 0.2 0.015 0.039 0.002 0.013 0.058 52
94 1410 0.2 0.015 0.039 0.002 0.013 0.058 52
95 1425 0.2 0.015 0.038 0.002 0.013 0.058 52
96 1440 0.2 0.015 0.038 0.002 0.013 0.058 52
97 1455 0.000 0
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Post-Development - POD-3B
Area: 3.459 acres Per Hydrology Map (to use in this report) Pervious B: 0.000 acres
Pervious C: 0.487 acres
Pervious D: 0.359 acres
% perv B: 0.0% Soil Type: B/C/D
% perv C: 14.1%
% perv D: 10.4%
% imperv: 75.5% RI (Plate D-5.5): 56/69/75 (Commercial Landscaping) RI (Plate D-5.5): 90 (impervious)
RI: AMC-I AMC-II AMC-III
56 0.68 0.48 0.28 (Plate E-6.2)
69 0.58 0.37 0.19 (Plate E-6.2)
75 0.50 0.30 0.15 (Plate E-6.2)
Weighted 0.55 0.34 0.17
Synthetic Unit Hydrograph
Post-Development Determination (Centerline of Parking lot) n: 0.013 (interpretation of Plate E.3)
L: 270 ft 0.051 miles
Lca: 100 ft 0.019 miles
U/S: 1612 ft
D/S: 1600 ft
s: 0.0444 ft/ft 234.7 ft/mile
tlag: 0.47 min
∆t (3hr, 6hr): 5 min
∆t (24hr): 15 min
As tlag < 5 - 7 min, Short Cut Hydrograph Method Used.

Post-Development - POD-3B
Return Period: 2 yr Low Loss Rate %: 27%
Duration of Rain: 24 hr % impervious: 75.5%
Rainfall: 1.83 inches Fp (AMC-I): 0.55 in/hr
Area: 3.46 acres Constant loss rate, F: 0.175 in/hr
Fm (as a % of F): 0.500
Volume: 16741 cu-ft Peak: 0.63 cfs
Period Time Pattern % Intensity Max Loss Low Effective TOTAL Volume (min) (in/hr) (in/hr) (in/hr) (in/hr) (cfs) (cf)
0 0.000 0
1 15 0.2 0.015 0.309 0.004 0.011 0.037 33
2 30 0.3 0.022 0.305 0.006 0.016 0.056 50
3 45 0.3 0.022 0.302 0.006 0.016 0.056 50
4 60 0.4 0.029 0.298 0.008 0.021 0.074 67
5 75 0.3 0.022 0.295 0.006 0.016 0.056 50
6 90 0.3 0.022 0.291 0.006 0.016 0.056 50
7 105 0.3 0.022 0.288 0.006 0.016 0.056 50
8 120 0.4 0.029 0.284 0.008 0.021 0.074 67
9 135 0.4 0.029 0.281 0.008 0.021 0.074 67
10 150 0.4 0.029 0.277 0.008 0.021 0.074 67
11 165 0.5 0.037 0.274 0.010 0.027 0.093 84
12 180 0.5 0.037 0.271 0.010 0.027 0.093 84
13 195 0.5 0.037 0.267 0.010 0.027 0.093 84
14 210 0.5 0.037 0.264 0.010 0.027 0.093 84
15 225 0.5 0.037 0.261 0.010 0.027 0.093 84
16 240 0.6 0.044 0.257 0.012 0.032 0.112 100
17 255 0.6 0.044 0.254 0.012 0.032 0.112 100
18 270 0.7 0.051 0.251 0.014 0.037 0.130 117
19 285 0.7 0.051 0.248 0.014 0.037 0.130 117
20 300 0.8 0.059 0.244 0.016 0.043 0.149 134
21 315 0.6 0.044 0.241 0.012 0.032 0.112 100
22 330 0.7 0.051 0.238 0.014 0.037 0.130 117
23 345 0.8 0.059 0.235 0.016 0.043 0.149 134
24 360 0.8 0.059 0.232 0.016 0.043 0.149 134
25 375 0.9 0.066 0.229 0.018 0.048 0.167 151
26 390 0.9 0.066 0.226 0.018 0.048 0.167 151
27 405 1 0.073 0.223 0.020 0.053 0.186 167
28 420 1 0.073 0.220 0.020 0.053 0.186 167
29 435 1 0.073 0.217 0.020 0.053 0.186 167
30 450 1.1 0.081 0.214 0.022 0.059 0.205 184
31 465 1.2 0.088 0.211 0.024 0.064 0.223 201
32 480 1.3 0.095 0.208 0.026 0.069 0.242 218
33 495 1.5 0.110 0.205 0.030 0.080 0.279 251
34 510 1.5 0.110 0.202 0.030 0.080 0.279 251
35 525 1.6 0.117 0.199 0.032 0.085 0.298 268
36 540 1.7 0.124 0.197 0.034 0.091 0.316 285
37 555 1.9 0.139 0.194 0.038 0.101 0.353 318
38 570 2 0.146 0.191 0.040 0.107 0.372 335
39 585 2.1 0.154 0.188 0.042 0.112 0.391 352
40 600 2.2 0.161 0.186 0.044 0.117 0.409 368
41 615 1.5 0.110 0.183 0.030 0.080 0.279 251
42 630 1.5 0.110 0.180 0.030 0.080 0.279 251
43 645 2 0.146 0.178 0.040 0.107 0.372 335
44 660 2 0.146 0.175 0.040 0.107 0.372 335
45 675 1.9 0.139 0.172 0.038 0.101 0.353 318
46 690 1.9 0.139 0.170 0.038 0.101 0.353 318
47 705 1.7 0.124 0.167 0.034 0.091 0.316 285
48 720 1.8 0.132 0.165 0.036 0.096 0.335 301
49 735 2.5 0.183 0.162 0.050 0.133 0.465 419
50 750 2.6 0.190 0.160 0.052 0.139 0.484 435
51 765 2.8 0.205 0.158 0.056 0.149 0.521 469
52 780 2.9 0.212 0.155 0.058 0.155 0.539 486
53 795 3.4 0.249 0.153 0.068 0.181 0.632 569
54 810 3.4 0.249 0.151 0.068 0.181 0.632 569
55 825 2.3 0.168 0.148 0.046 0.123 0.428 385
56 840 2.3 0.168 0.146 0.046 0.123 0.428 385
57 855 2.7 0.198 0.144 0.054 0.144 0.502 452
58 870 2.6 0.190 0.142 0.052 0.139 0.484 435
59 885 2.6 0.190 0.139 0.052 0.139 0.484 435
60 900 2.5 0.183 0.137 0.050 0.133 0.465 419
61 915 2.4 0.176 0.135 0.048 0.128 0.446 402
62 930 2.3 0.168 0.133 0.046 0.123 0.428 385
63 945 1.9 0.139 0.131 0.038 0.101 0.353 318
64 960 1.9 0.139 0.129 0.038 0.101 0.353 318
65 975 0.4 0.029 0.127 0.008 0.021 0.074 67
66 990 0.4 0.029 0.125 0.008 0.021 0.074 67
67 1005 0.3 0.022 0.123 0.006 0.016 0.056 50
68 1020 0.3 0.022 0.121 0.006 0.016 0.056 50
69 1035 0.5 0.037 0.120 0.010 0.027 0.093 84
70 1050 0.5 0.037 0.118 0.010 0.027 0.093 84
71 1065 0.5 0.037 0.116 0.010 0.027 0.093 84
72 1080 0.4 0.029 0.114 0.008 0.021 0.074 67
73 1095 0.4 0.029 0.113 0.008 0.021 0.074 67
74 1110 0.4 0.029 0.111 0.008 0.021 0.074 67
75 1125 0.3 0.022 0.109 0.006 0.016 0.056 50
76 1140 0.2 0.015 0.108 0.004 0.011 0.037 33
77 1155 0.3 0.022 0.106 0.006 0.016 0.056 50
78 1170 0.4 0.029 0.105 0.008 0.021 0.074 67
79 1185 0.3 0.022 0.103 0.006 0.016 0.056 50
80 1200 0.2 0.015 0.102 0.004 0.011 0.037 33
81 1215 0.3 0.022 0.101 0.006 0.016 0.056 50
82 1230 0.3 0.022 0.099 0.006 0.016 0.056 50
83 1245 0.3 0.022 0.098 0.006 0.016 0.056 50
84 1260 0.2 0.015 0.097 0.004 0.011 0.037 33
85 1275 0.3 0.022 0.096 0.006 0.016 0.056 50
86 1290 0.2 0.015 0.095 0.004 0.011 0.037 33
87 1305 0.3 0.022 0.094 0.006 0.016 0.056 50
88 1320 0.2 0.015 0.093 0.004 0.011 0.037 33
89 1335 0.3 0.022 0.092 0.006 0.016 0.056 50
90 1350 0.2 0.015 0.091 0.004 0.011 0.037 33
91 1365 0.2 0.015 0.090 0.004 0.011 0.037 33
92 1380 0.2 0.015 0.089 0.004 0.011 0.037 33
93 1395 0.2 0.015 0.089 0.004 0.011 0.037 33
94 1410 0.2 0.015 0.088 0.004 0.011 0.037 33
95 1425 0.2 0.015 0.088 0.004 0.011 0.037 33
96 1440 0.2 0.015 0.088 0.004 0.011 0.037 33
97 1455 0.000 0
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Post-Development - DMA-4
Area: 13.816 acres Per Hydrology Map (to use in this report) Pervious B: 0.000 acres
Pervious C: 1.463 acres
Pervious D: 0.039 acres
% perv B: 0.0% Soil Type: B/C/D
% perv C: 10.6%
% perv D: 0.3%
% imperv: 89.1% RI (Plate D-5.5): 56/69/75 (Commercial Landscaping) RI (Plate D-5.5): 90 (impervious)
RI: AMC-I AMC-II AMC-III
56 0.68 0.48 0.28 (Plate E-6.2)
69 0.58 0.37 0.19 (Plate E-6.2)
75 0.50 0.30 0.15 (Plate E-6.2)
Weighted 0.58 0.37 0.19
Synthetic Unit Hydrograph
Post-Development Determination (Centerline of Parking lot) n: 0.013 (interpretation of Plate E.3)
L: 1000 ft 0.189 miles
Lca: 500 ft 0.095 miles
U/S: 1695 ft
D/S: 1685 ft
s: 0.0100 ft/ft 52.8 ft/mile
tlag: 1.91 min
∆t (3hr, 6hr): 5 min
∆t (24hr): 15 min
As tlag < 5 - 7 min, Short Cut Hydrograph Method Used.

Post-Development - DMA-4
Return Period: 2 yr Low Loss Rate %: 18%
Duration of Rain: 24 hr % impervious: 89.1%
Rainfall: 1.83 inches Fp (AMC-I): 0.58 in/hr
Area: 13.82 acres Constant loss rate, F: 0.114 in/hr
Fm (as a % of F): 0.500
Volume: 75619 cu-ft Peak: 2.86 cfs
Period Time Pattern % Intensity Max Loss Low Effective TOTAL Volume (min) (in/hr) (in/hr) (in/hr) (in/hr) (cfs) (cf)
0 0.000 0
1 15 0.2 0.015 0.202 0.003 0.012 0.168 151
2 30 0.3 0.022 0.200 0.004 0.018 0.252 227
3 45 0.3 0.022 0.197 0.004 0.018 0.252 227
4 60 0.4 0.029 0.195 0.005 0.024 0.336 302
5 75 0.3 0.022 0.193 0.004 0.018 0.252 227
6 90 0.3 0.022 0.190 0.004 0.018 0.252 227
7 105 0.3 0.022 0.188 0.004 0.018 0.252 227
8 120 0.4 0.029 0.186 0.005 0.024 0.336 302
9 135 0.4 0.029 0.184 0.005 0.024 0.336 302
10 150 0.4 0.029 0.181 0.005 0.024 0.336 302
11 165 0.5 0.037 0.179 0.006 0.030 0.420 378
12 180 0.5 0.037 0.177 0.006 0.030 0.420 378
13 195 0.5 0.037 0.175 0.006 0.030 0.420 378
14 210 0.5 0.037 0.173 0.006 0.030 0.420 378
15 225 0.5 0.037 0.170 0.006 0.030 0.420 378
16 240 0.6 0.044 0.168 0.008 0.036 0.504 454
17 255 0.6 0.044 0.166 0.008 0.036 0.504 454
18 270 0.7 0.051 0.164 0.009 0.042 0.588 529
19 285 0.7 0.051 0.162 0.009 0.042 0.588 529
20 300 0.8 0.059 0.160 0.010 0.048 0.672 605
21 315 0.6 0.044 0.158 0.008 0.036 0.504 454
22 330 0.7 0.051 0.156 0.009 0.042 0.588 529
23 345 0.8 0.059 0.154 0.010 0.048 0.672 605
24 360 0.8 0.059 0.152 0.010 0.048 0.672 605
25 375 0.9 0.066 0.150 0.012 0.054 0.756 681
26 390 0.9 0.066 0.148 0.012 0.054 0.756 681
27 405 1 0.073 0.146 0.013 0.060 0.840 756
28 420 1 0.073 0.144 0.013 0.060 0.840 756
29 435 1 0.073 0.142 0.013 0.060 0.840 756
30 450 1.1 0.081 0.140 0.014 0.066 0.924 832
31 465 1.2 0.088 0.138 0.015 0.072 1.008 907
32 480 1.3 0.095 0.136 0.017 0.078 1.092 983
33 495 1.5 0.110 0.134 0.019 0.090 1.260 1134
34 510 1.5 0.110 0.132 0.019 0.090 1.260 1134
35 525 1.6 0.117 0.130 0.021 0.096 1.344 1210
36 540 1.7 0.124 0.129 0.022 0.103 1.428 1286
37 555 1.9 0.139 0.127 0.024 0.115 1.596 1437
38 570 2 0.146 0.125 0.026 0.121 1.680 1512
39 585 2.1 0.154 0.123 0.027 0.127 1.764 1588
40 600 2.2 0.161 0.121 0.028 0.133 1.848 1664
41 615 1.5 0.110 0.120 0.019 0.090 1.260 1134
42 630 1.5 0.110 0.118 0.019 0.090 1.260 1134
43 645 2 0.146 0.116 0.026 0.121 1.680 1512
44 660 2 0.146 0.114 0.026 0.121 1.680 1512
45 675 1.9 0.139 0.113 0.024 0.115 1.596 1437
46 690 1.9 0.139 0.111 0.024 0.115 1.596 1437
47 705 1.7 0.124 0.109 0.022 0.103 1.428 1286
48 720 1.8 0.132 0.108 0.023 0.109 1.512 1361
49 735 2.5 0.183 0.106 0.032 0.151 2.101 1890
50 750 2.6 0.190 0.105 0.034 0.157 2.185 1966
51 765 2.8 0.205 0.103 0.036 0.169 2.353 2117
52 780 2.9 0.212 0.101 0.037 0.175 2.437 2193
53 795 3.4 0.249 0.100 0.044 0.205 2.857 2571
54 810 3.4 0.249 0.098 0.044 0.205 2.857 2571
55 825 2.3 0.168 0.097 0.030 0.139 1.932 1739
56 840 2.3 0.168 0.095 0.030 0.139 1.932 1739
57 855 2.7 0.198 0.094 0.035 0.163 2.269 2042
58 870 2.6 0.190 0.093 0.034 0.157 2.185 1966
59 885 2.6 0.190 0.091 0.034 0.157 2.185 1966
60 900 2.5 0.183 0.090 0.032 0.151 2.101 1890
61 915 2.4 0.176 0.088 0.031 0.145 2.016 1815
62 930 2.3 0.168 0.087 0.030 0.139 1.932 1739
63 945 1.9 0.139 0.086 0.024 0.115 1.596 1437
64 960 1.9 0.139 0.084 0.024 0.115 1.596 1437
65 975 0.4 0.029 0.083 0.005 0.024 0.336 302
66 990 0.4 0.029 0.082 0.005 0.024 0.336 302
67 1005 0.3 0.022 0.081 0.004 0.018 0.252 227
68 1020 0.3 0.022 0.079 0.004 0.018 0.252 227
69 1035 0.5 0.037 0.078 0.006 0.030 0.420 378
70 1050 0.5 0.037 0.077 0.006 0.030 0.420 378
71 1065 0.5 0.037 0.076 0.006 0.030 0.420 378
72 1080 0.4 0.029 0.075 0.005 0.024 0.336 302
73 1095 0.4 0.029 0.074 0.005 0.024 0.336 302
74 1110 0.4 0.029 0.073 0.005 0.024 0.336 302
75 1125 0.3 0.022 0.072 0.004 0.018 0.252 227
76 1140 0.2 0.015 0.070 0.003 0.012 0.168 151
77 1155 0.3 0.022 0.070 0.004 0.018 0.252 227
78 1170 0.4 0.029 0.069 0.005 0.024 0.336 302
79 1185 0.3 0.022 0.068 0.004 0.018 0.252 227
80 1200 0.2 0.015 0.067 0.003 0.012 0.168 151
81 1215 0.3 0.022 0.066 0.004 0.018 0.252 227
82 1230 0.3 0.022 0.065 0.004 0.018 0.252 227
83 1245 0.3 0.022 0.064 0.004 0.018 0.252 227
84 1260 0.2 0.015 0.063 0.003 0.012 0.168 151
85 1275 0.3 0.022 0.063 0.004 0.018 0.252 227
86 1290 0.2 0.015 0.062 0.003 0.012 0.168 151
87 1305 0.3 0.022 0.061 0.004 0.018 0.252 227
88 1320 0.2 0.015 0.061 0.003 0.012 0.168 151
89 1335 0.3 0.022 0.060 0.004 0.018 0.252 227
90 1350 0.2 0.015 0.059 0.003 0.012 0.168 151
91 1365 0.2 0.015 0.059 0.003 0.012 0.168 151
92 1380 0.2 0.015 0.058 0.003 0.012 0.168 151
93 1395 0.2 0.015 0.058 0.003 0.012 0.168 151
94 1410 0.2 0.015 0.058 0.003 0.012 0.168 151
95 1425 0.2 0.015 0.057 0.003 0.012 0.168 151
96 1440 0.2 0.015 0.057 0.003 0.012 0.168 151
97 1455 0.000 0
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Post-Development - DMA-4A
Area: 0.189 acres Per Hydrology Map (to use in this report) Pervious B: 0.000 acres
Pervious C: 0.101 acres
Pervious D: 0.088 acres
% perv B: 0.0% Soil Type: C/D
% perv C: 53.6%
% perv D: 46.4%
% imperv: 0.0% RI (Plate D-5.5): 56/69/75 (Commercial Landscaping) RI (Plate D-5.5): 90 (impervious)
RI: AMC-I AMC-II AMC-III
69 0.68 0.48 0.28 (Plate E-6.2)
80 0.58 0.37 0.19 (Plate E-6.2)
85 0.50 0.30 0.15 (Plate E-6.2)
Weighted 0.54 0.34 0.17
Synthetic Unit Hydrograph
Post-Development Determination (Flowline of Area)
n: 0.03 (interpretation of Plate E.3)
L: 100 ft 0.019 miles
Lca: 50 ft 0.009 miles
U/S: 1585 ft
D/S: 1568 ft
s: 0.1700 ft/ft 897.6 ft/mile
tlag: 0.45 min
∆t (3hr, 6hr): 5 min
∆t (24hr): 15 min
As tlag < 5 - 7 min, Short Cut Hydrograph Method Used.

Post-Development - DMA-4A
Return Period: 2 yr Low Loss Rate %: 80%
Duration of Rain: 24 hr % impervious: 0.0%
Rainfall: 1.83 inches Fp (AMC-I): 0.54 in/hr
Area: 0.19 acres Constant loss rate, F: 0.543 in/hr
Fm (as a % of F): 0.500
Volume: 251 cu-ft Peak: 0.01 cfs
Period Time Pattern % Intensity Max Loss Low Effective TOTAL Volume (min) (in/hr) (in/hr) (in/hr) (in/hr) (cfs) (cf)
0 0.000 0
1 15 0.2 0.015 0.959 0.012 0.003 0.001 1
2 30 0.3 0.022 0.948 0.018 0.004 0.001 1
3 45 0.3 0.022 0.936 0.018 0.004 0.001 1
4 60 0.4 0.029 0.925 0.023 0.006 0.001 1
5 75 0.3 0.022 0.915 0.018 0.004 0.001 1
6 90 0.3 0.022 0.904 0.018 0.004 0.001 1
7 105 0.3 0.022 0.893 0.018 0.004 0.001 1
8 120 0.4 0.029 0.882 0.023 0.006 0.001 1
9 135 0.4 0.029 0.871 0.023 0.006 0.001 1
10 150 0.4 0.029 0.861 0.023 0.006 0.001 1
11 165 0.5 0.037 0.850 0.029 0.007 0.001 1
12 180 0.5 0.037 0.840 0.029 0.007 0.001 1
13 195 0.5 0.037 0.830 0.029 0.007 0.001 1
14 210 0.5 0.037 0.819 0.029 0.007 0.001 1
15 225 0.5 0.037 0.809 0.029 0.007 0.001 1
16 240 0.6 0.044 0.799 0.035 0.009 0.002 2
17 255 0.6 0.044 0.789 0.035 0.009 0.002 2
18 270 0.7 0.051 0.779 0.041 0.010 0.002 2
19 285 0.7 0.051 0.769 0.041 0.010 0.002 2
20 300 0.8 0.059 0.759 0.047 0.012 0.002 2
21 315 0.6 0.044 0.749 0.035 0.009 0.002 2
22 330 0.7 0.051 0.739 0.041 0.010 0.002 2
23 345 0.8 0.059 0.729 0.047 0.012 0.002 2
24 360 0.8 0.059 0.720 0.047 0.012 0.002 2
25 375 0.9 0.066 0.710 0.053 0.013 0.003 2
26 390 0.9 0.066 0.701 0.053 0.013 0.003 2
27 405 1 0.073 0.691 0.059 0.015 0.003 3
28 420 1 0.073 0.682 0.059 0.015 0.003 3
29 435 1 0.073 0.673 0.059 0.015 0.003 3
30 450 1.1 0.081 0.664 0.064 0.016 0.003 3
31 465 1.2 0.088 0.654 0.070 0.018 0.003 3
32 480 1.3 0.095 0.645 0.076 0.019 0.004 3
33 495 1.5 0.110 0.637 0.088 0.022 0.004 4
34 510 1.5 0.110 0.628 0.088 0.022 0.004 4
35 525 1.6 0.117 0.619 0.094 0.023 0.004 4
36 540 1.7 0.124 0.610 0.100 0.025 0.005 4
37 555 1.9 0.139 0.601 0.111 0.028 0.005 5
38 570 2 0.146 0.593 0.117 0.029 0.006 5
39 585 2.1 0.154 0.584 0.123 0.031 0.006 5
40 600 2.2 0.161 0.576 0.129 0.032 0.006 6
41 615 1.5 0.110 0.568 0.088 0.022 0.004 4
42 630 1.5 0.110 0.559 0.088 0.022 0.004 4
43 645 2 0.146 0.551 0.117 0.029 0.006 5
44 660 2 0.146 0.543 0.117 0.029 0.006 5
45 675 1.9 0.139 0.535 0.111 0.028 0.005 5
46 690 1.9 0.139 0.527 0.111 0.028 0.005 5
47 705 1.7 0.124 0.520 0.100 0.025 0.005 4
48 720 1.8 0.132 0.512 0.105 0.026 0.005 5
49 735 2.5 0.183 0.504 0.146 0.037 0.007 6
50 750 2.6 0.190 0.497 0.152 0.038 0.007 7
51 765 2.8 0.205 0.489 0.164 0.041 0.008 7
52 780 2.9 0.212 0.482 0.170 0.042 0.008 7
53 795 3.4 0.249 0.475 0.199 0.050 0.009 9
54 810 3.4 0.249 0.467 0.199 0.050 0.009 9
55 825 2.3 0.168 0.460 0.135 0.034 0.006 6
56 840 2.3 0.168 0.453 0.135 0.034 0.006 6
57 855 2.7 0.198 0.446 0.158 0.040 0.008 7
58 870 2.6 0.190 0.440 0.152 0.038 0.007 7
59 885 2.6 0.190 0.433 0.152 0.038 0.007 7
60 900 2.5 0.183 0.426 0.146 0.037 0.007 6
61 915 2.4 0.176 0.420 0.141 0.035 0.007 6
62 930 2.3 0.168 0.413 0.135 0.034 0.006 6
63 945 1.9 0.139 0.407 0.111 0.028 0.005 5
64 960 1.9 0.139 0.401 0.111 0.028 0.005 5
65 975 0.4 0.029 0.395 0.023 0.006 0.001 1
66 990 0.4 0.029 0.389 0.023 0.006 0.001 1
67 1005 0.3 0.022 0.383 0.018 0.004 0.001 1
68 1020 0.3 0.022 0.377 0.018 0.004 0.001 1
69 1035 0.5 0.037 0.371 0.029 0.007 0.001 1
70 1050 0.5 0.037 0.366 0.029 0.007 0.001 1
71 1065 0.5 0.037 0.360 0.029 0.007 0.001 1
72 1080 0.4 0.029 0.355 0.023 0.006 0.001 1
73 1095 0.4 0.029 0.350 0.023 0.006 0.001 1
74 1110 0.4 0.029 0.345 0.023 0.006 0.001 1
75 1125 0.3 0.022 0.340 0.018 0.004 0.001 1
76 1140 0.2 0.015 0.335 0.012 0.003 0.001 1
77 1155 0.3 0.022 0.330 0.018 0.004 0.001 1
78 1170 0.4 0.029 0.325 0.023 0.006 0.001 1
79 1185 0.3 0.022 0.321 0.018 0.004 0.001 1
80 1200 0.2 0.015 0.317 0.012 0.003 0.001 1
81 1215 0.3 0.022 0.312 0.018 0.004 0.001 1
82 1230 0.3 0.022 0.308 0.018 0.004 0.001 1
83 1245 0.3 0.022 0.305 0.018 0.004 0.001 1
84 1260 0.2 0.015 0.301 0.012 0.003 0.001 1
85 1275 0.3 0.022 0.297 0.018 0.004 0.001 1
86 1290 0.2 0.015 0.294 0.012 0.003 0.001 1
87 1305 0.3 0.022 0.291 0.018 0.004 0.001 1
88 1320 0.2 0.015 0.288 0.012 0.003 0.001 1
89 1335 0.3 0.022 0.285 0.018 0.004 0.001 1
90 1350 0.2 0.015 0.282 0.012 0.003 0.001 1
91 1365 0.2 0.015 0.280 0.012 0.003 0.001 1
92 1380 0.2 0.015 0.277 0.012 0.003 0.001 1
93 1395 0.2 0.015 0.276 0.012 0.003 0.001 1
94 1410 0.2 0.015 0.274 0.012 0.003 0.001 1
95 1425 0.2 0.015 0.273 0.012 0.003 0.001 1
96 1440 0.2 0.015 0.272 0.012 0.003 0.001 1
97 1455 0.000 0
Sycamore Hills Business Center
Drainage Study

THIS PAGE INTENTIONALLY LEFT BLANK FOR DOUBLE SIDED PRINTING

Sycamore Hills Business Center
HMP Analysis

APPENDIX : ELEVATION – VOLUME – DISCHARGE TABLES

FOR MODIFIED PULS

Sycamore Hills Business Center
Drainage Study

THIS PAGE INTENTIONALLY LEFT BLANK FOR DOUBLE SIDED PRINTING

Project:

Chamber Model - MC-4500
Units - Imperial
Number of Chambers - 200
Number of End Caps - 8
Voids in the stone (porosity) - 40 %
Base of Stone Elevation - 0.00 ft
Amount of Stone Above Chambers - 12 in
Amount of Stone Below Chambers - 18 in
9 Area of system - 8500 sf Min. Area -
Height of
System
Incremental Single
Chamber
Incremental
Single End Cap
Incremental
Chambers
Incremental
End Cap
Incremental
Stone
Incremental Ch,
EC and Stone
Cumulative
System Elevation
(inches) (cubic feet) (cubic feet) (cubic feet) (cubic feet) (cubic feet) (cubic feet) (cubic feet) (feet) 90 0.00 0.00 0.00 0.00 283.33 283.33 38470.61 7.50
89 0.00 0.00 0.00 0.00 283.33 283.33 38187.27 7.42
88 0.00 0.00 0.00 0.00 283.33 283.33 37903.94 7.33
87 0.00 0.00 0.00 0.00 283.33 283.33 37620.61 7.25
86 0.00 0.00 0.00 0.00 283.33 283.33 37337.27 7.17
85 0.00 0.00 0.00 0.00 283.33 283.33 37053.94 7.08
84 0.00 0.00 0.00 0.00 283.33 283.33 36770.61 7.00
83 0.00 0.00 0.00 0.00 283.33 283.33 36487.27 6.92
82 0.00 0.00 0.00 0.00 283.33 283.33 36203.94 6.83
81 0.00 0.00 0.00 0.00 283.33 283.33 35920.61 6.75
80 0.00 0.00 0.00 0.00 283.33 283.33 35637.27 6.67
79 0.00 0.00 0.00 0.00 283.33 283.33 35353.94 6.58
78 0.04 0.01 8.19 0.10 280.01 288.31 35070.61 6.50
77 0.12 0.03 23.22 0.27 273.94 297.43 34782.29 6.42
76 0.16 0.05 32.95 0.41 269.99 303.35 34484.87 6.33
75 0.21 0.07 41.74 0.53 266.42 308.70 34181.52 6.25
74 0.27 0.08 53.67 0.66 261.60 315.93 33872.82 6.17
73 0.45 0.11 90.56 0.84 246.77 338.17 33556.89 6.08
72 0.67 0.13 133.05 1.06 229.69 363.80 33218.71 6.00
71 0.80 0.16 159.80 1.29 218.90 379.99 32854.91 5.92
70 0.91 0.19 181.63 1.51 210.08 393.21 32474.92 5.83
69 1.00 0.22 200.58 1.75 202.40 404.73 32081.71 5.75
68 1.09 0.25 217.47 1.98 195.56 415.00 31676.98 5.67
67 1.16 0.28 232.70 2.20 189.37 424.27 31261.98 5.58
66 1.23 0.30 246.80 2.41 183.65 432.86 30837.71 5.50
65 1.30 0.33 259.94 2.62 178.31 440.87 30404.84 5.42
64 1.36 0.35 272.21 2.84 173.32 448.36 29963.98 5.33
63 1.42 0.38 283.74 3.07 168.61 455.42 29515.62 5.25
62 1.47 0.41 294.67 3.27 164.16 462.10 29060.20 5.17
61 1.53 0.44 305.03 3.53 159.91 468.47 28598.10 5.08
60 1.57 0.47 314.90 3.75 155.87 474.52 28129.63 5.00
59 1.62 0.50 324.28 3.96 152.04 480.28 27655.11 4.92
58 1.67 0.52 333.25 4.17 148.37 485.78 27174.83 4.83
57 1.71 0.54 341.82 4.36 144.86 491.04 26689.05 4.75
56 1.75 0.57 350.02 4.53 141.51 496.06 26198.01 4.67
55 1.79 0.59 357.86 4.71 138.31 500.87 25701.95 4.58
54 1.83 0.61 365.44 4.88 135.21 505.52 25201.08 4.50
53 1.86 0.63 372.69 5.06 132.24 509.98 24695.55 4.42
52 1.90 0.64 379.66 5.14 129.41 514.22 24185.57 4.33
51 1.93 0.68 386.37 5.42 126.62 518.40 23671.35 4.25
50 1.96 0.70 392.82 5.60 123.97 522.38 23152.95 4.17
49 2.00 0.72 399.02 5.78 121.41 526.21 22630.57 4.08
48 2.03 0.74 405.00 5.95 118.95 529.90 22104.35 4.00
47 2.05 0.76 410.76 6.12 116.58 533.46 21574.45 3.92
46 2.08 0.79 416.30 6.28 114.30 536.88 21040.99 3.83
45 2.11 0.80 421.62 6.42 112.12 540.16 20504.11 3.75
44 2.13 0.82 426.77 6.56 110.00 543.33 19963.95 3.67
43 2.16 0.84 431.74 6.71 107.96 546.40 19420.62 3.58
42 2.18 0.85 436.51 6.81 106.01 549.32 18874.22 3.50
41 2.21 0.86 441.10 6.88 104.14 552.12 18324.90 3.42
40 2.23 0.89 445.53 7.12 102.27 554.92 17772.77 3.33
39 2.25 0.90 449.77 7.23 100.53 557.54 17217.85 3.25
38 2.27 0.92 453.87 7.34 98.85 560.06 16660.31 3.17
37 2.29 0.92 457.80 7.36 97.27 562.43 16100.26 3.08
36 2.31 0.94 461.57 7.55 95.69 564.80 15537.83 3.00
35 2.33 0.96 465.19 7.65 94.20 567.04 14973.03 2.92
34 2.34 0.97 468.66 7.75 92.77 569.18 14405.99 2.83
33 2.36 0.98 471.98 7.85 91.40 571.23 13836.81 2.75
32 2.38 0.97 475.16 7.77 90.16 573.09 13265.58 2.67
31 2.39 1.00 478.20 8.03 88.84 575.07 12692.49 2.58
30 2.41 1.01 481.09 8.09 87.66 576.84 12117.42 2.50
29 2.42 1.02 483.85 8.16 86.53 578.54 11540.58 2.42
28 2.43 1.03 486.48 8.24 85.45 580.16 10962.04 2.33
27 2.44 1.04 488.97 8.31 84.42 581.70 10381.87 2.25
26 2.46 1.05 491.33 8.37 83.45 583.15 9800.17 2.17
25 2.47 1.05 493.56 8.43 82.54 584.53 9217.02 2.08
StormTech MC-4500 Cumulative Storage Volumes
7583 sf min. area
Include Perimeter Stone in Calculations
Click Here for Metric

Outlet structure for Discharge of BMP 2A Page# 1
Discharge vs Elevation Table Note: 0.00 is the invert of the French Drain Low orifice 1.750 " Lower slot Lower Weir
Number of orif: 1 Number of slots: 1 Number of weirs: 0 Cg-low: 0.61 Invert: 4.50 ft Invert: 0.000 ft
B 0.500 ft B: 0.000 ft
Middle orifice 1.375 " hslot 0.250 ft
Number of orif: 1.000
Cg-middle: 0.61 Upper slot Upper Weir Emergency weir
invert elev: 3.167 ft Number of slots: 0 Number of weirs: 0 Invert: 7.250 ft Invert: 0.00 ft Invert: 0.000 ft W: 3.50 ft
B: 0.000 ft B: 0.00 ft
hslot 0.000 ft
h* H/D-low H/D-mid Qlow-orif Qlow-weir Qtot-low Qmid-orif Qmid-weir Qtot-med Qslot-low Qslot-upp Qlweir Quweir Qemerg Qtot (ft) - - (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs)

0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

0.083 0.571 0.000 0.008 0.008 0.008 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.008

0.167 1.143 0.000 0.025 0.026 0.025 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.025

0.250 1.714 0.000 0.034 0.044 0.034 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.034

0.333 2.286 0.000 0.042 0.055 0.042 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.042

0.417 2.857 0.000 0.048 0.057 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.048

0.500 3.429 0.000 0.053 0.062 0.053 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.053

0.583 4.000 0.000 0.058 0.096 0.058 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.058

0.667 4.571 0.000 0.063 0.208 0.063 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.063

0.750 5.143 0.000 0.067 0.472 0.067 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.067

0.833 5.714 0.000 0.071 0.713 0.071 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.071

0.917 6.286 0.000 0.075 0.751 0.075 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.075

1.000 6.857 0.000 0.079 0.787 0.079 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.079

1.083 7.429 0.000 0.082 0.822 0.082 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.082

1.167 8.000 0.000 0.086 0.855 0.086 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.086

1.250 8.571 0.000 0.089 0.887 0.089 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.089

1.333 9.143 0.000 0.092 0.918 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.092

1.417 9.714 0.000 0.095 0.948 0.095 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.095

1.500 10.286 0.000 0.098 0.977 0.098 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.098

1.583 10.857 0.000 0.100 1.005 0.100 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.100

1.667 11.429 0.000 0.103 1.032 0.103 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.103

1.750 12.000 0.000 0.106 1.059 0.106 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.106

1.833 12.571 0.000 0.108 1.085 0.108 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.108

1.917 13.143 0.000 0.111 1.110 0.111 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.111

2.000 13.714 0.000 0.114 1.135 0.114 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.114

2.083 14.286 0.000 0.116 1.159 0.116 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.116

2.167 14.857 0.000 0.118 1.183 0.118 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.118

2.250 15.429 0.000 0.121 1.206 0.121 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.121

2.333 16.000 0.000 0.123 1.229 0.123 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.123

2.417 16.571 0.000 0.125 1.252 0.125 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.125

2.500 17.143 0.000 0.127 1.274 0.127 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.127

2.583 17.714 0.000 0.130 1.296 0.130 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.130

2.667 18.286 0.000 0.132 1.317 0.132 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.132

2.750 18.857 0.000 0.134 1.338 0.134 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.134

2.833 19.429 0.000 0.136 1.359 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.136

2.917 20.000 0.000 0.138 1.379 0.138 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.138

3.000 20.571 0.000 0.140 1.399 0.140 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.140

3.083 21.143 0.000 0.142 1.419 0.142 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.142

3.167 21.714 0.000 0.144 1.438 0.144 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.144

3.250 22.286 0.727 0.146 1.457 0.146 0.008 0.007 0.007 0.000 0.000 0.000 0.000 0.000 0.152

3.333 22.857 1.455 0.148 1.476 0.148 0.017 0.020 0.017 0.000 0.000 0.000 0.000 0.000 0.164

3.417 23.429 2.182 0.150 1.495 0.150 0.022 0.029 0.022 0.000 0.000 0.000 0.000 0.000 0.172

3.500 24.000 2.909 0.151 1.514 0.151 0.027 0.031 0.027 0.000 0.000 0.000 0.000 0.000 0.178

3.583 24.571 3.636 0.153 1.532 0.153 0.030 0.038 0.030 0.000 0.000 0.000 0.000 0.000 0.183

3.667 25.143 4.364 0.155 1.550 0.155 0.034 0.084 0.034 0.000 0.000 0.000 0.000 0.000 0.189

3.750 25.714 5.091 0.157 1.568 0.157 0.037 0.240 0.037 0.000 0.000 0.000 0.000 0.000 0.193

3.833 26.286 5.818 0.159 1.586 0.159 0.039 0.616 0.039 0.000 0.000 0.000 0.000 0.000 0.198

3.917 26.857 6.545 0.160 1.603 0.160 0.042 1.372 0.042 0.000 0.000 0.000 0.000 0.000 0.202

4.000 27.429 7.273 0.162 1.620 0.162 0.044 2.729 0.044 0.000 0.000 0.000 0.000 0.000 0.207

4.083 28.000 8.000 0.164 1.637 0.164 0.047 4.972 0.047 0.000 0.000 0.000 0.000 0.000 0.211

4.167 28.571 8.727 0.165 1.654 0.165 0.049 8.467 0.049 0.000 0.000 0.000 0.000 0.000 0.214

4.250 29.143 9.455 0.167 1.671 0.167 0.051 13.660 0.051 0.000 0.000 0.000 0.000 0.000 0.218

4.333 29.714 10.182 0.169 1.688 0.169 0.053 21.095 0.053 0.000 0.000 0.000 0.000 0.000 0.222

4.417 30.286 10.909 0.170 1.704 0.170 0.055 31.416 0.055 0.000 0.000 0.000 0.000 0.000 0.226

4.500 30.857 11.636 0.172 1.720 0.172 0.057 45.379 0.057 0.000 0.000 0.000 0.000 0.000 0.229

4.583 31.429 12.364 0.174 1.737 0.174 0.059 63.858 0.059 0.037 0.000 0.000 0.000 0.000 0.270

4.667 32.000 13.091 0.175 1.753 0.175 0.061 87.858 0.061 0.105 0.000 0.000 0.000 0.000 0.341

4.750 32.571 13.818 0.177 1.768 0.177 0.062 118.519 0.062 0.194 0.000 0.000 0.000 0.000 0.433

4.833 33.143 14.545 0.178 1.784 0.178 0.064 157.129 0.064 0.279 0.000 0.000 0.000 0.000 0.522

4.917 33.714 15.273 0.180 1.800 0.180 0.066 205.128 0.066 0.330 0.000 0.000 0.000 0.000 0.576

5.000 34.286 16.000 0.181 1.815 0.181 0.067 264.120 0.067 0.375 0.000 0.000 0.000 0.000 0.623

5.083 34.857 16.727 0.183 1.830 0.183 0.069 335.882 0.069 0.414 0.000 0.000 0.000 0.000 0.666

5.167 35.429 17.455 0.185 1.845 0.185 0.070 422.371 0.070 0.450 0.000 0.000 0.000 0.000 0.705

5.250 36.000 18.182 0.186 1.860 0.186 0.072 525.732 0.072 0.484 0.000 0.000 0.000 0.000 0.742

5.333 36.571 18.909 0.188 1.875 0.188 0.073 648.310 0.073 0.515 0.000 0.000 0.000 0.000 0.776

5.417 37.143 19.636 0.189 1.890 0.189 0.075 792.655 0.075 0.544 0.000 0.000 0.000 0.000 0.808 *Note: h = head above the invert of the
lowest surface discharge opening.

5.500 37.714 20.364 0.190 1.905 0.190 0.076 961.533 0.076 0.572 0.000 0.000 0.000 0.000 0.839

5.583 38.286 21.091 0.192 1.919 0.192 0.078 1157.934 0.078 0.599 0.000 0.000 0.000 0.000 0.868

5.667 38.857 21.818 0.193 1.934 0.193 0.079 1385.080 0.079 0.625 0.000 0.000 0.000 0.000 0.897

5.750 39.429 22.545 0.195 1.948 0.195 0.080 1646.436 0.080 0.649 0.000 0.000 0.000 0.000 0.924

5.833 40.000 23.273 0.196 1.962 0.196 0.082 1945.714 0.082 0.673 0.000 0.000 0.000 0.000 0.950

5.917 40.571 24.000 0.198 1.977 0.198 0.083 2286.889 0.083 0.695 0.000 0.000 0.000 0.000 0.976 Page# 2

6.000 41.143 24.727 0.199 1.991 0.199 0.084 2674.200 0.084 0.718 0.000 0.000 0.000 0.000 1.001

6.083 41.714 25.455 0.200 2.005 0.200 0.085 3112.163 0.085 0.739 0.000 0.000 0.000 0.000 1.025

6.167 42.286 26.182 0.202 2.018 0.202 0.087 3605.579 0.087 0.760 0.000 0.000 0.000 0.000 1.048

6.250 42.857 26.909 0.203 2.032 0.203 0.088 4159.544 0.088 0.780 0.000 0.000 0.000 0.000 1.071

6.333 43.429 27.636 0.205 2.046 0.205 0.089 4779.454 0.089 0.800 0.000 0.000 0.000 0.000 1.093

6.417 44.000 28.364 0.206 2.059 0.206 0.090 5471.016 0.090 0.819 0.000 0.000 0.000 0.000 1.115

6.500 44.571 29.091 0.207 2.073 0.207 0.091 6240.259 0.091 0.838 0.000 0.000 0.000 0.000 1.137

6.583 45.143 29.818 0.209 2.086 0.209 0.093 7093.536 0.093 0.856 0.000 0.000 0.000 0.000 1.157

6.667 45.714 30.545 0.210 2.100 0.210 0.094 8037.541 0.094 0.874 0.000 0.000 0.000 0.000 1.178

6.750 46.286 31.273 0.211 2.113 0.211 0.095 9079.313 0.095 0.892 0.000 0.000 0.000 0.000 1.198

6.833 46.857 32.000 0.213 2.126 0.213 0.096 10226.242 0.096 0.909 0.000 0.000 0.000 0.000 1.218

6.917 47.429 32.727 0.214 2.139 0.214 0.097 11486.085 0.097 0.926 0.000 0.000 0.000 0.000 1.237

7.000 48.000 33.455 0.215 2.152 0.215 0.098 12866.969 0.098 0.943 0.000 0.000 0.000 0.000 1.256

7.083 48.571 34.182 0.216 2.165 0.216 0.099 14377.400 0.099 0.959 0.000 0.000 0.000 0.000 1.275

7.167 49.143 34.909 0.218 2.178 0.218 0.100 16026.277 0.100 0.976 0.000 0.000 0.000 0.000 1.294

7.250 49.714 35.636 0.219 2.191 0.219 0.101 17822.892 0.101 0.991 0.000 0.000 0.000 0.000 1.312

7.333 50.286 36.364 0.220 2.203 0.220 0.102 19776.948 0.102 1.007 0.000 0.000 0.000 0.261 1.591

7.417 50.857 37.091 0.222 2.216 0.222 0.103 21898.559 0.103 1.022 0.000 0.000 0.000 0.738 2.086

7.500 51.429 37.818 0.223 2.228 0.223 0.104 24198.265 0.104 1.038 0.000 0.000 0.000 1.356 2.721 Stage-Storage for BMP-2B - Basin 1
Elevation (ft) Area (ft2) Volume (ft3)

0.00 1829 0.000 BOTTOM OF GRAVEL LAYER (0.4 Voids)

0.08 1829 61

0.17 1829 122

0.25 1829 183

0.33 1829 244

0.42 1829 305

0.50 1829 366

0.58 1829 427

0.67 1829 488

0.75 1829 549

0.83 1829 610

0.92 1829 671

1.00 1829 732 TOP OF GRAVEL LAYER

1.08 1829 777

1.17 1829 823

1.25 1829 869

1.33 1829 915

1.42 1829 960

1.50 1829 1006

1.58 1829 1052

1.67 1829 1097

1.75 1829 1143

1.83 1829 1189

1.92 1829 1235

2.00 1829 1280

2.08 1829 1326

2.17 1829 1372

2.25 1829 1417

2.33 1829 1463

2.42 1829 1509

2.50 1829 1555

2.58 1829 1600

2.67 1829 1646

2.75 1829 1692

2.83 1829 1738

2.92 1829 1783

3.00 1829 1829

3.08 1829 1875

3.17 1829 1920

3.25 1829 1966

3.33 1829 2012

3.42 1829 2058

3.50 1829 2103

3.58 1829 2149

3.67 1829 2195

3.75 1829 2241 TOP OF AMMENDED SOILS LAYER(0.3Voids)

3.83 1829 2286

3.92 1829 2332

4.00 1829 2378 TOP OF MULCH(1)

4.08 1829 2530

4.17 1829 2683

4.25 1829 2835

4.33 1829 2987

4.42 1829 3140

4.50 1829 3292

4.58 1829 3445

4.67 1829 3597

4.75 1829 3749

4.83 1829 3902

4.92 1829 4054

5.00 1829 4207

5.08 1829 4359

5.17 1829 4512

5.25 1829 4664

5.33 1829 4816

5.42 1829 4969

5.50 1829 5121 SURFACE DISCHARGE(2) (FIRST OUTLET)

5.58 1829 5274

5.67 1829 5426

5.75 1829 5578

5.83 1829 5731

5.92 1829 5883

6.00 1829 6036

6.08 1829 6188

6.17 1829 6341

6.25 1829 6493

6.33 1829 6645

6.42 1829 6798

6.50 1829 6950

6.58 1829 7103

6.67 1829 7255

6.75 1829 7407 SURFACE DISCHARGE (TOP OF RISER)

6.83 1829 7560

6.92 1829 7712

7.00 1829 7865

7.08 1829 8017

7.17 1829 8170

7.25 1829 8322

7.33 1829 8474

7.42 1829 8627

7.50 1829 8779

7.58 1829 8932

7.67 1829 9084

7.75 1829 9236

7.83 1829 9389

7.92 1829 9541

8.00 1829 9694
(1): The area at this surface elevation corresponds to the area of gravel and amended soil (Bio-filtration layer) (2): Volume at this elevation coresponds with surface volume for WQ purposes (invert of lowest surface outlet) Outlet structure for Discharge of BMP 2B-Basin 1 Page# 1 Discharge vs Elevation Table Note: 0.00 is the invert of the French Drain Low orifice 0.750 " Lower slot Lower Weir
Number of orif: 1 Number of slots: 1 Number of weirs: 0 Cg-low: 0.61 Invert: 4.50 ft Invert: 0.000 ft
B 0.500 ft B: 0.000 ft
Middle orifice 1.000 " hslot 0.167 ft
Number of orif: 0.000
Cg-middle: 0.61 Upper slot Upper Weir Emergency weir
invert elev: 0 ft Number of slots: 0 Number of weirs: 0 Invert: 7.000 ft Invert: 0.00 ft Invert: 0.000 ft W: 16.00 ft
B: 0.000 ft B: 0.00 ft
hslot 0.000 ft
h* H/D-low H/D-mid Qlow-orif Qlow-weir Qtot-low Qmid-orif Qmid-weir Qtot-med Qslot-low Qslot-upp Qlweir Quweir Qemerg Qtot (ft) - - (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs)

0.000 0.000 0.000 0.00000 0.000 0.0000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0000

0.083 1.333 1.000 0.00343 0.004 0.0034 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0034

0.167 2.667 2.000 0.00553 0.007 0.0055 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0055

0.250 4.000 3.000 0.00702 0.012 0.0070 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0070

0.333 5.333 4.000 0.00825 0.073 0.0083 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0083

0.417 6.667 5.000 0.00932 0.093 0.0093 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0093

0.500 8.000 6.000 0.01028 0.103 0.0103 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0103

0.583 9.333 7.000 0.01116 0.112 0.0112 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0112

0.667 10.667 8.000 0.01197 0.120 0.0120 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0120

0.750 12.000 9.000 0.01273 0.127 0.0127 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0127

0.833 13.333 10.000 0.01345 0.135 0.0135 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0135

0.917 14.667 11.000 0.01413 0.141 0.0141 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0141

1.000 16.000 12.000 0.01478 0.148 0.0148 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0148

1.083 17.333 13.000 0.01540 0.154 0.0154 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0154

1.167 18.667 14.000 0.01600 0.160 0.0160 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0160

1.250 20.000 15.000 0.01658 0.166 0.0166 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0166

1.333 21.333 16.000 0.01714 0.171 0.0171 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0171

1.417 22.667 17.000 0.01768 0.177 0.0177 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0177

1.500 24.000 18.000 0.01820 0.182 0.0182 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0182

1.583 25.333 19.000 0.01871 0.187 0.0187 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0187

1.667 26.667 20.000 0.01921 0.192 0.0192 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0192

1.750 28.000 21.000 0.01969 0.197 0.0197 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0197

1.833 29.333 22.000 0.02016 0.202 0.0202 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0202

1.917 30.667 23.000 0.02062 0.206 0.0206 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0206

2.000 32.000 24.000 0.02107 0.211 0.0211 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0211

2.083 33.333 25.000 0.02151 0.215 0.0215 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0215

2.167 34.667 26.000 0.02195 0.219 0.0219 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0219

2.250 36.000 27.000 0.02237 0.224 0.0224 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0224

2.333 37.333 28.000 0.02279 0.228 0.0228 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0228

2.417 38.667 29.000 0.02320 0.232 0.0232 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0232

2.500 40.000 30.000 0.02360 0.236 0.0236 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0236

2.583 41.333 31.000 0.02399 0.240 0.0240 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0240

2.667 42.667 32.000 0.02438 0.244 0.0244 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0244

2.750 44.000 33.000 0.02476 0.248 0.0248 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0248

2.833 45.333 34.000 0.02514 0.251 0.0251 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0251

2.917 46.667 35.000 0.02551 0.255 0.0255 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0255

3.000 48.000 36.000 0.02588 0.259 0.0259 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0259

3.083 49.333 37.000 0.02624 0.262 0.0262 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0262

3.167 50.667 38.000 0.02659 0.266 0.0266 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0266

3.250 52.000 39.000 0.02694 0.269 0.0269 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0269

3.333 53.333 40.000 0.02729 0.273 0.0273 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0273

3.417 54.667 41.000 0.02763 0.276 0.0276 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0276

3.500 56.000 42.000 0.02797 0.280 0.0280 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0280

3.583 57.333 43.000 0.02831 0.283 0.0283 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0283

3.667 58.667 44.000 0.02864 0.286 0.0286 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0286

3.750 60.000 45.000 0.02896 0.290 0.0290 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0290

3.833 61.333 46.000 0.02928 0.293 0.0293 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0293

3.917 62.667 47.000 0.02960 0.296 0.0296 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0296

4.000 64.000 48.000 0.02992 0.299 0.0299 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0299

4.083 65.333 49.000 0.03023 0.302 0.0302 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0302

4.167 66.667 50.000 0.03054 0.305 0.0305 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0305

4.250 68.000 51.000 0.03085 0.308 0.0308 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0308

4.333 69.333 52.000 0.03115 0.312 0.0312 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0312

4.417 70.667 53.000 0.03145 0.315 0.0315 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0315

4.500 72.000 54.000 0.03175 0.317 0.0317 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0317

4.583 73.333 55.000 0.03204 0.320 0.0320 0.000 0.000 0.000 0.037 0.000 0.000 0.000 0.000 0.0693

4.667 74.667 56.000 0.03233 0.323 0.0323 0.000 0.000 0.000 0.105 0.000 0.000 0.000 0.000 0.1378

4.750 76.000 57.000 0.03262 0.326 0.0326 0.000 0.000 0.000 0.167 0.000 0.000 0.000 0.000 0.1992

4.833 77.333 58.000 0.03291 0.329 0.0329 0.000 0.000 0.000 0.204 0.000 0.000 0.000 0.000 0.2369

4.917 78.667 59.000 0.03320 0.332 0.0332 0.000 0.000 0.000 0.236 0.000 0.000 0.000 0.000 0.2687

5.000 80.000 60.000 0.03348 0.335 0.0335 0.000 0.000 0.000 0.263 0.000 0.000 0.000 0.000 0.2968

5.083 81.333 61.000 0.03376 0.338 0.0338 0.000 0.000 0.000 0.288 0.000 0.000 0.000 0.000 0.3222

5.167 82.667 62.000 0.03403 0.340 0.0340 0.000 0.000 0.000 0.312 0.000 0.000 0.000 0.000 0.3456

5.250 84.000 63.000 0.03431 0.343 0.0343 0.000 0.000 0.000 0.333 0.000 0.000 0.000 0.000 0.3674

5.333 85.333 64.000 0.03458 0.346 0.0346 0.000 0.000 0.000 0.353 0.000 0.000 0.000 0.000 0.3879

5.417 86.667 65.000 0.03485 0.349 0.0349 0.000 0.000 0.000 0.372 0.000 0.000 0.000 0.000 0.4072

5.500 88.000 66.000 0.03512 0.351 0.0351 0.000 0.000 0.000 0.391 0.000 0.000 0.000 0.000 0.4257

5.583 89.333 67.000 0.03539 0.354 0.0354 0.000 0.000 0.000 0.408 0.000 0.000 0.000 0.000 0.4433

5.667 90.667 68.000 0.03565 0.357 0.0357 0.000 0.000 0.000 0.425 0.000 0.000 0.000 0.000 0.4602

5.750 92.000 69.000 0.03591 0.359 0.0359 0.000 0.000 0.000 0.441 0.000 0.000 0.000 0.000 0.4765

5.833 93.333 70.000 0.03618 0.362 0.0362 0.000 0.000 0.000 0.456 0.000 0.000 0.000 0.000 0.4923

5.917 94.667 71.000 0.03643 0.364 0.0364 0.000 0.000 0.000 0.471 0.000 0.000 0.000 0.000 0.5075 *Note: h = head above the invert of the
lowest surface discharge opening.

6.000 96.000 72.000 0.03669 0.367 0.037 0.000 0.000 0.000 0.486 0.000 0.000 0.000 0.000 0.5222

6.083 97.333 73.000 0.03695 0.369 0.037 0.000 0.000 0.000 0.500 0.000 0.000 0.000 0.000 0.5366

6.167 98.667 74.000 0.03720 0.372 0.037 0.000 0.000 0.000 0.513 0.000 0.000 0.000 0.000 0.5505 Page# 2

6.250 100.000 75.000 0.03745 0.375 0.037 0.000 0.000 0.000 0.527 0.000 0.000 0.000 0.000 0.5641

6.333 101.333 76.000 0.03770 0.377 0.038 0.000 0.000 0.000 0.540 0.000 0.000 0.000 0.000 0.5773

6.417 102.667 77.000 0.03795 0.380 0.038 0.000 0.000 0.000 0.552 0.000 0.000 0.000 0.000 0.5903

6.500 104.000 78.000 0.03820 0.382 0.038 0.000 0.000 0.000 0.565 0.000 0.000 0.000 0.000 0.6030

6.583 105.333 79.000 0.03844 0.384 0.038 0.000 0.000 0.000 0.577 0.000 0.000 0.000 0.000 0.6153

6.667 106.667 80.000 0.03869 0.387 0.039 0.000 0.000 0.000 0.589 0.000 0.000 0.000 0.000 0.6275

6.750 108.000 81.000 0.03893 0.389 0.039 0.000 0.000 0.000 0.600 0.000 0.000 0.000 0.000 0.6394

6.833 109.333 82.000 0.03917 0.392 0.039 0.000 0.000 0.000 0.612 0.000 0.000 0.000 0.000 0.6511

6.917 110.667 83.000 0.03941 0.394 0.039 0.000 0.000 0.000 0.623 0.000 0.000 0.000 0.000 0.6625

7.000 112.000 84.000 0.03965 0.396 0.040 0.000 0.000 0.000 0.634 0.000 0.000 0.000 0.000 0.6738 Stage-Storage for BMP-2B Basin 2
Elevation (ft) Area (ft2) Volume (ft3)

0.00 4352 0 BOTTOM OF GRAVEL LAYER (0.4 Voids)

1.00 4352 1741 TOP OF GRAVEL LAYER

3.00 4352 4352

3.75 4352 5331 TOP OF AMMENDED SOILS LAYER(0.3Voids)

4.00 4352 5658 TOP OF MULCH(1)

4.08 5795 6080

4.17 5825 6565

4.25 5854 7051

4.33 5884 7540

4.42 5914 8032

4.50 5943 8526 SURFACE DISCHARGE(2) (FIRST OUTLET)

4.58 5973 9022

4.67 6002 9521

4.75 6032 10023

4.83 6061 10527

4.92 6091 11033

5.00 6120 11542

5.08 6150 12053

5.17 6179 12567

5.25 6209 13083

5.33 6239 13602

5.42 6268 14123

5.50 6298 14646

5.58 6327 15172

5.67 6357 15701

5.75 6386 16232

5.83 6416 16765

5.92 6445 17301

6.00 6475 17839

6.08 6505 18380

6.17 6534 18924

6.25 6564 19469

6.33 6593 20017

6.42 6623 20568

6.50 6652 21121

6.58 6682 21677 Surface Discharge (2nd Outlet)

6.67 6712 22235

6.75 6741 22795

6.83 6771 23358

6.92 6800 23924

7.00 6830 24492

7.08 6859 25062

7.17 6889 25635

7.25 6919 26210

7.33 6948 26788

7.42 6978 27368

7.50 7007 27951

7.58 7037 28536

7.67 7067 29124

7.75 7096 29714 SURFACE DISCHARGE (TOP OF RISER)

7.83 7126 30307

7.92 7155 30902

8.00 7185 31499

8.08 7215 32099

8.17 7244 32702

8.25 7274 33307

8.33 7303 33914

8.42 7333 34524

8.50 7363 35136

8.58 7392 35751

8.67 7422 36368

8.75 7451 36988

8.83 7481 37610

8.92 7511 38235

9.00 7540 38862
(1): The area at this surface elevation corresponds to the area of gravel and amended soil (Bio- filtration layer)
(2): Volume at this elevation coresponds with surface volume for WQ purposes (invert of lowest surface outlet)
Outlet structure for Discharge of BMP 2B-Basin 2 Page# 1 Discharge vs Elevation Table Note: 0.00 is the invert of the French Drain Low orifice 1.625 " Lower slot Lower Weir
Number of orif: 1 Number of slots: 1 Number of weirs: 0 Cg-low: 0.61 Invert: 7.00 ft Invert: 0.000 ft
B 0.250 ft B: 0.000 ft
Middle orifice 1.000 " hslot 0.250 ft
Number of orif: 3.000
Cg-middle: 0.61 Upper slot Upper Weir Emergency weir
invert elev: 4.50 ft Number of slots: 0 Number of weirs: 0 Invert: 8.500 ft Invert: 0.00 ft Invert: 0.000 ft W: 4.00 ft
B: 0.000 ft B: 0.00 ft
hslot 0.000 ft
h* H/D-low H/D-mid Qlow-orif Qlow-weir Qtot-low Qmid-orif Qmid-weir Qtot-med Qslot-low Qslot-upp Qlweir Quweir Qemerg Qtot (ft) - - (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs)

0.000 0.000 0.000 0.00000 0.000 0.0000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0000

1.000 7.385 0.000 0.06807 0.681 0.0681 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0681

3.000 22.154 0.000 0.12073 1.207 0.1207 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.1207

3.750 27.692 0.000 0.13529 1.353 0.1353 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.1353

4.000 29.538 0.000 0.13981 1.398 0.1398 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.1398

4.083 30.154 0.000 0.14128 1.413 0.1413 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.1413

4.167 30.769 0.000 0.14274 1.427 0.1427 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.1427

4.250 31.385 0.000 0.14418 1.442 0.1442 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.1442

4.333 32.000 0.000 0.14561 1.456 0.1456 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.1456

4.417 32.615 0.000 0.14703 1.470 0.1470 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.1470

4.500 33.231 0.000 0.14843 1.484 0.1484 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.1484

4.583 33.846 0.999 0.14982 1.498 0.1498 0.016 0.016 0.016 0.000 0.000 0.000 0.000 0.000 0.1654

4.667 34.462 1.999 0.15119 1.512 0.1512 0.028 0.038 0.028 0.000 0.000 0.000 0.000 0.000 0.1795

4.750 35.077 2.999 0.15256 1.526 0.1526 0.037 0.042 0.037 0.000 0.000 0.000 0.000 0.000 0.1891

4.833 35.692 3.999 0.15391 1.539 0.1539 0.043 0.071 0.043 0.000 0.000 0.000 0.000 0.000 0.1972

4.917 36.308 4.999 0.15525 1.552 0.1552 0.049 0.286 0.049 0.000 0.000 0.000 0.000 0.000 0.2043

5.000 36.923 5.999 0.15658 1.566 0.1566 0.054 1.030 0.054 0.000 0.000 0.000 0.000 0.000 0.2108

5.083 37.538 6.999 0.15790 1.579 0.1579 0.059 2.883 0.059 0.000 0.000 0.000 0.000 0.000 0.2168

5.167 38.154 7.999 0.15920 1.592 0.1592 0.063 6.722 0.063 0.000 0.000 0.000 0.000 0.000 0.2225

5.250 38.769 8.999 0.16050 1.605 0.1605 0.067 13.776 0.067 0.000 0.000 0.000 0.000 0.000 0.2279

5.333 39.385 9.999 0.16178 1.618 0.1618 0.071 25.683 0.071 0.000 0.000 0.000 0.000 0.000 0.2330

5.417 40.000 10.999 0.16306 1.631 0.1631 0.075 44.554 0.075 0.000 0.000 0.000 0.000 0.000 0.2380

5.500 40.615 11.999 0.16432 1.643 0.1643 0.078 73.024 0.078 0.000 0.000 0.000 0.000 0.000 0.2427

5.583 41.231 12.999 0.16558 1.656 0.1656 0.082 114.312 0.082 0.000 0.000 0.000 0.000 0.000 0.2473

5.667 41.846 13.999 0.16682 1.668 0.1668 0.085 172.281 0.085 0.000 0.000 0.000 0.000 0.000 0.2518

5.750 42.462 14.999 0.16806 1.681 0.1681 0.088 251.491 0.088 0.000 0.000 0.000 0.000 0.000 0.2561

5.833 43.077 15.999 0.16929 1.693 0.1693 0.091 357.264 0.091 0.000 0.000 0.000 0.000 0.000 0.2603

5.917 43.692 16.999 0.17051 1.705 0.1705 0.094 495.733 0.094 0.000 0.000 0.000 0.000 0.000 0.2644

6.000 44.308 17.999 0.17172 1.717 0.1717 0.097 673.908 0.097 0.000 0.000 0.000 0.000 0.000 0.2684

6.083 44.923 18.999 0.17292 1.729 0.1729 0.099 899.727 0.099 0.000 0.000 0.000 0.000 0.000 0.2724

6.167 45.538 19.999 0.17411 1.741 0.1741 0.102 1182.119 0.102 0.000 0.000 0.000 0.000 0.000 0.2762

6.250 46.154 20.999 0.17530 1.753 0.1753 0.105 1531.058 0.105 0.000 0.000 0.000 0.000 0.000 0.2800

6.333 46.769 21.999 0.17648 1.765 0.1765 0.107 1957.625 0.107 0.000 0.000 0.000 0.000 0.000 0.2837

6.417 47.385 22.999 0.17765 1.776 0.1776 0.110 2474.060 0.110 0.000 0.000 0.000 0.000 0.000 0.2873

6.500 48.000 23.999 0.17881 1.788 0.1788 0.112 3093.824 0.112 0.000 0.000 0.000 0.000 0.000 0.2909

6.583 48.615 24.999 0.17996 1.800 0.1800 0.114 3831.658 0.114 0.000 0.000 0.000 0.000 0.000 0.2944

6.667 49.231 25.999 0.18111 1.811 0.1811 0.117 4703.636 0.117 0.000 0.000 0.000 0.000 0.000 0.2979

6.750 49.846 26.999 0.18225 1.823 0.1823 0.119 5727.225 0.119 0.000 0.000 0.000 0.000 0.000 0.3013

6.833 50.462 27.999 0.18338 1.834 0.1834 0.121 6921.346 0.121 0.000 0.000 0.000 0.000 0.000 0.3046

6.917 51.077 28.999 0.18451 1.845 0.1845 0.123 8306.425 0.123 0.000 0.000 0.000 0.000 0.000 0.3079

7.000 51.692 29.999 0.18563 1.856 0.1856 0.126 9904.459 0.126 0.000 0.000 0.000 0.000 0.000 0.3112

7.083 52.308 30.999 0.18674 1.867 0.1867 0.128 11739.066 0.128 0.019 0.000 0.000 0.000 0.000 0.3331

7.167 52.923 31.999 0.18785 1.878 0.1878 0.130 13835.547 0.130 0.053 0.000 0.000 0.000 0.000 0.3704

7.250 53.538 32.999 0.18895 1.889 0.1889 0.132 16220.945 0.132 0.097 0.000 0.000 0.000 0.000 0.4176

7.333 54.154 33.999 0.19004 1.900 0.1900 0.134 18924.098 0.134 0.140 0.000 0.000 0.000 0.000 0.4635

7.417 54.769 34.999 0.19113 1.911 0.1911 0.136 21975.702 0.136 0.165 0.000 0.000 0.000 0.000 0.4922

7.500 55.385 35.999 0.19221 1.922 0.1922 0.138 25408.364 0.138 0.187 0.000 0.000 0.000 0.000 0.5173

7.583 56.000 36.999 0.19328 1.933 0.1933 0.140 29256.665 0.140 0.207 0.000 0.000 0.000 0.000 0.5401

7.667 56.615 37.999 0.19435 1.943 0.1943 0.142 33557.213 0.142 0.225 0.000 0.000 0.000 0.000 0.5611

7.750 57.231 38.999 0.19541 1.954 0.1954 0.143 38348.702 0.143 0.242 0.000 0.000 0.000 0.000 0.5808

7.833 57.846 39.999 0.19647 1.965 0.1965 0.145 43671.973 0.145 0.257 0.000 0.000 0.000 0.000 0.5993

7.917 58.462 40.999 0.19752 1.975 0.1975 0.147 49570.067 0.147 0.272 0.000 0.000 0.000 0.000 0.6169

8.000 59.077 41.999 0.19857 1.986 0.1986 0.149 56088.287 0.149 0.286 0.000 0.000 0.000 0.000 0.6337

8.083 59.692 42.999 0.19961 1.996 0.1996 0.151 63274.252 0.151 0.300 0.000 0.000 0.000 0.000 0.6499

8.167 60.308 43.999 0.20064 2.006 0.2006 0.152 71177.958 0.152 0.312 0.000 0.000 0.000 0.000 0.6654

8.250 60.923 44.999 0.20167 2.017 0.2017 0.154 79851.834 0.154 0.325 0.000 0.000 0.000 0.000 0.6804

8.333 61.538 45.999 0.20270 2.027 0.2027 0.156 89350.801 0.156 0.336 0.000 0.000 0.000 0.000 0.6950

8.417 62.154 46.999 0.20372 2.037 0.2037 0.158 99732.327 0.158 0.348 0.000 0.000 0.000 0.000 0.7091

8.500 62.769 47.999 0.20473 2.047 0.2047 0.159 111056.489 0.159 0.359 0.000 0.000 0.000 0.000 0.7228

8.583 63.385 48.999 0.20574 2.057 0.2057 0.161 123386.026 0.161 0.369 0.000 0.000 0.000 0.298 1.0345

8.667 64.000 49.999 0.20674 2.067 0.2067 0.163 136786.403 0.163 0.380 0.000 0.000 0.000 0.844 1.5930

8.750 64.615 50.999 0.20774 2.077 0.2077 0.164 151325.862 0.164 0.390 0.000 0.000 0.000 1.550 2.3121

8.833 65.231 51.999 0.20874 2.087 0.2087 0.166 167075.483 0.166 0.400 0.000 0.000 0.000 2.386 3.1609

8.917 65.846 52.999 0.20973 2.097 0.2097 0.168 184109.245 0.168 0.410 0.000 0.000 0.000 3.335 4.1219

9.000 66.462 53.999 0.21071 2.107 0.2107 0.169 202504.076 0.169 0.419 0.000 0.000 0.000 4.384 5.1828 *Note: h = head above the invert of the
lowest surface discharge opening.

Stage-Storage for BMP-3A
Elevation (ft) Area (ft2) Volume (ft3)

0.00 6757 0 BOTTOM OF GRAVEL LAYER (0.4 Voids)

1.00 6757 2703 TOP OF GRAVEL LAYER

2.00 6757 4730

3.75 6757 8277 TOP OF AMMENDED SOILS LAYER(0.3Voids)

4.00 6757 8784 TOP OF MULCH(1)

4.08 6757 9347

4.17 6757 9910

4.25 6757 10473

4.33 6757 11036

4.42 6757 11600

4.50 6757 12163 SURFACE DISCHARGE(2) (FIRST OUTLET)

4.58 6757 12726

4.67 6757 13289

4.75 6757 13852

4.83 6757 14415

4.92 6757 14978

5.00 6757 15541

5.08 6757 16104

5.17 6757 16667

5.25 6757 17230

5.33 6757 17793

5.42 6757 18357

5.50 6757 18920

5.58 6757 19483

5.67 6757 20046

5.75 6757 20609

5.83 6757 21172

5.92 6757 21735

6.00 6757 22298

6.08 6757 22861

6.17 6757 23424

6.25 6757 23987 Surface Discharge (2nd Outlet)

6.33 6757 24550

6.42 6757 25114

6.50 6757 25677

6.58 6757 26240

6.67 6757 26803

6.75 6757 27366

6.83 6757 27929

6.92 6757 28492

7.00 6757 29055

7.08 6757 29618

7.17 6757 30181

7.25 6757 30744

7.33 6757 31307

7.42 6757 31871

7.50 6757 32434

7.58 6757 32997

7.67 6757 33560

7.75 6757 34123

7.83 6757 34686

7.92 6757 35249

8.00 6757 35812

8.08 6757 36375

8.17 6757 36938

8.25 6757 37501 SURFACE DISCHARGE (TOP OF RISER)

8.33 6757 38064

8.42 6757 38628

8.50 6757 39191
(1): The area at this surface elevation corresponds to the area of gravel and amended soil (Bio- filtration layer)
(2): Volume at this elevation coresponds with surface volume for WQ purposes (invert of lowest surface outlet)
Outlet structure for Discharge of BMP 3A Page# 1
Discharge vs Elevation Table Note: 0.00 is the invert of the French Drain Low orifice 1.667 " Lower slot Lower Weir
Number of orif: 1 Number of slots: 0 Number of weirs: 0.000 Cg-low: 0.61 Invert: 5.833 ft Invert: 7.750 ft
B 0.146 ft B: 0.500 ft
Middle orifice 0.875 " hslot 0.083 ft
Number of orif: 1.000
Cg-middle: 0.61 Upper slot Upper Weir Emergency weir
invert elev: 4.5 ft Number of slots: 1 Number of weirs: 0 Invert: 8.250 ft Invert: 6.25 ft Invert: 7.500 ft W: 16.00 ft
B: 0.96 ft B: 1.00 ft
hslot 0.167 ft
h* H/D-low H/D-mid Qlow-orif Qlow-weir Qtot-low Qmid-orif Qmid-weir Qtot-med Qslot-low Qslot-upp Qlweir Quweir Qemerg Qtot (ft) - - (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs)

0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

1.000 7.199 0.000 0.072 0.716 0.072 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.072

2.000 14.397 0.000 0.103 1.031 0.103 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.103

3.750 26.995 0.000 0.142 1.423 0.142 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.142

4.000 28.794 0.000 0.147 1.471 0.147 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.147

4.083 29.394 0.000 0.149 1.486 0.149 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.149

4.167 29.994 0.000 0.150 1.502 0.150 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.150

4.250 30.594 0.000 0.152 1.517 0.152 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.152

4.333 31.194 0.000 0.153 1.532 0.153 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.153

4.417 31.794 0.000 0.155 1.547 0.155 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.155

4.500 32.394 0.000 0.156 1.562 0.156 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.156

4.583 32.993 1.143 0.158 1.576 0.158 0.004 0.005 0.004 0.000 0.000 0.000 0.000 0.000 0.162

4.667 33.593 2.286 0.159 1.591 0.159 0.007 0.010 0.007 0.000 0.000 0.000 0.000 0.000 0.166

4.750 34.193 3.429 0.161 1.605 0.161 0.009 0.011 0.009 0.000 0.000 0.000 0.000 0.000 0.170

4.833 34.793 4.571 0.162 1.619 0.162 0.011 0.037 0.011 0.000 0.000 0.000 0.000 0.000 0.173

4.917 35.393 5.714 0.163 1.633 0.163 0.013 0.176 0.013 0.000 0.000 0.000 0.000 0.000 0.176

5.000 35.993 6.857 0.165 1.647 0.165 0.014 0.603 0.014 0.000 0.000 0.000 0.000 0.000 0.179

5.083 36.593 8.000 0.166 1.661 0.166 0.015 1.606 0.015 0.000 0.000 0.000 0.000 0.000 0.181

5.167 37.193 9.143 0.168 1.675 0.168 0.016 3.616 0.016 0.000 0.000 0.000 0.000 0.000 0.184

5.250 37.792 10.286 0.169 1.689 0.169 0.017 7.229 0.017 0.000 0.000 0.000 0.000 0.000 0.186

5.333 38.392 11.429 0.170 1.702 0.170 0.018 13.235 0.018 0.000 0.000 0.000 0.000 0.000 0.188

5.417 38.992 12.571 0.172 1.716 0.172 0.019 22.647 0.019 0.000 0.000 0.000 0.000 0.000 0.191

5.500 39.592 13.714 0.173 1.729 0.173 0.020 36.725 0.020 0.000 0.000 0.000 0.000 0.000 0.193

5.583 40.192 14.857 0.174 1.742 0.174 0.021 57.005 0.021 0.000 0.000 0.000 0.000 0.000 0.195

5.667 40.792 16.000 0.176 1.755 0.176 0.022 85.323 0.022 0.000 0.000 0.000 0.000 0.000 0.197

5.750 41.392 17.143 0.177 1.768 0.177 0.023 123.845 0.023 0.000 0.000 0.000 0.000 0.000 0.199

5.833 41.992 18.286 0.178 1.781 0.178 0.023 175.094 0.023 0.000 0.000 0.000 0.000 0.000 0.201

5.917 42.591 19.429 0.179 1.794 0.179 0.024 241.972 0.024 0.000 0.000 0.000 0.000 0.000 0.203

6.000 43.191 20.571 0.181 1.807 0.181 0.025 327.795 0.025 0.000 0.000 0.000 0.000 0.000 0.205

6.083 43.791 21.714 0.182 1.819 0.182 0.025 436.311 0.025 0.000 0.000 0.000 0.000 0.000 0.207

6.167 44.391 22.857 0.183 1.832 0.183 0.026 571.735 0.026 0.000 0.000 0.000 0.000 0.000 0.209

6.250 44.991 24.000 0.184 1.845 0.184 0.027 738.769 0.027 0.000 0.000 0.000 0.000 0.000 0.211

6.333 45.591 25.143 0.186 1.857 0.186 0.027 942.633 0.027 0.000 0.071 0.000 0.000 0.000 0.284

6.417 46.191 26.286 0.187 1.869 0.187 0.028 1189.093 0.028 0.000 0.202 0.000 0.000 0.000 0.417

6.500 46.791 27.429 0.188 1.881 0.188 0.029 1484.484 0.029 0.000 0.319 0.000 0.000 0.000 0.536

6.583 47.391 28.571 0.189 1.894 0.189 0.029 1835.738 0.029 0.000 0.391 0.000 0.000 0.000 0.609

6.667 47.990 29.714 0.191 1.906 0.191 0.030 2250.412 0.030 0.000 0.451 0.000 0.000 0.000 0.672

6.750 48.590 30.857 0.192 1.918 0.192 0.030 2736.717 0.030 0.000 0.504 0.000 0.000 0.000 0.727

6.833 49.190 32.000 0.193 1.930 0.193 0.031 3303.539 0.031 0.000 0.553 0.000 0.000 0.000 0.776

6.917 49.790 33.143 0.194 1.941 0.194 0.032 3960.471 0.032 0.000 0.597 0.000 0.000 0.000 0.823

7.000 50.390 34.286 0.195 1.953 0.195 0.032 4717.839 0.032 0.000 0.638 0.000 0.000 0.000 0.865

7.083 50.990 35.429 0.196 1.965 0.196 0.033 5586.726 0.033 0.000 0.677 0.000 0.000 0.000 0.906

7.167 51.590 36.571 0.198 1.977 0.198 0.033 6579.002 0.033 0.000 0.713 0.000 0.000 0.000 0.944

7.250 52.190 37.714 0.199 1.988 0.199 0.034 7707.350 0.034 0.000 0.748 0.000 0.000 0.000 0.981

7.333 52.789 38.857 0.200 2.000 0.200 0.034 8985.293 0.034 0.000 0.781 0.000 0.000 0.000 1.016

7.417 53.389 40.000 0.201 2.011 0.201 0.035 10427.220 0.035 0.000 0.813 0.000 0.000 0.000 1.049

7.500 53.989 41.143 0.202 2.022 0.202 0.035 12048.415 0.035 0.000 0.844 0.000 0.000 0.000 1.082

7.583 54.589 42.286 0.203 2.034 0.203 0.036 13865.080 0.036 0.000 0.874 0.000 0.000 0.000 1.113

7.667 55.189 43.429 0.205 2.045 0.205 0.036 15894.367 0.036 0.000 0.902 0.000 0.000 0.000 1.143

7.750 55.789 44.571 0.206 2.056 0.206 0.037 18154.400 0.037 0.000 0.930 0.000 0.000 0.000 1.172

7.833 56.389 45.714 0.207 2.067 0.207 0.037 20664.305 0.037 0.000 0.957 0.000 0.000 0.000 1.201

7.917 56.989 46.857 0.208 2.078 0.208 0.038 23444.237 0.038 0.000 0.983 0.000 0.000 0.000 1.229

8.000 57.588 48.000 0.209 2.089 0.209 0.038 26515.405 0.038 0.000 1.009 0.000 0.000 0.000 1.256 *Note: h = head above the invert of the
lowest surface discharge opening.

Stage-Storage for BMP-3B
Elevation (ft) Area (ft2) Volume (ft3)

0.00 10584 0 BOTTOM OF GRAVEL LAYER (0.4 Voids)

1.00 10584 4234 TOP OF GRAVEL LAYER

2.00 10584 7409

2.75 10584 9790 TOP OF AMMENDED SOILS LAYER(0.3Voids)

3.00 10584 10584 TOP OF MULCH(1)

3.08 10584 11466

3.17 10584 12348

3.25 10584 13230

3.33 10584 14112

3.42 10584 14994

3.50 10584 15876 SURFACE DISCHARGE(2) FIRST OUTLET)

3.58 10584 16758

3.67 10584 17640

3.75 10584 18522

3.83 10584 19404

3.92 10584 20286

4.00 10584 21168

4.08 10584 22050

4.17 10584 22932

4.25 10584 23814

4.33 10584 24696

4.42 10584 25578

4.50 10584 26460

4.58 10584 27342

4.67 10584 28224

4.75 10584 29106

4.83 10584 29988

4.92 10584 30870

5.00 10584 31752

5.08 10584 32634

5.17 10584 33516

5.25 10584 34398

5.33 10584 35280

5.42 10584 36162

5.50 10584 37044 SURFACE DISCHARGE (TOP OF RISER)

5.58 10584 37926

5.67 10584 38808

5.75 10584 39690

5.83 10584 40572

5.92 10584 41454

6.00 10584 42336

6.08 10584 43218

6.17 10584 44100

6.25 10584 44982

6.33 10584 45864

6.42 10584 46746

6.50 10584 47628
(2): Volume at this elevation coresponds with surface volume for WQ purposes (invert of lowest surface outlet) (1): The area at this surface elevation corresponds to the area of gravel and amended soil (Bio-filtration layer) Outlet structure for Discharge of BMP 3B Page# 1
Discharge vs Elevation Table Note: 0.00 is the invert of the French Drain Low orifice 1.125 " Lower slot Lower Weir
Number of orif: 1 Number of slots: 0 Number of we 0
Cg-low: 0.61 Invert: 0.00 ft Invert: 0.000 ft
B 0.00 ft B: 0.000 ft
Middle orifice 1.500 " hslot 0.000 ft
Number of orif: 1.000
Cg-middle: 0.61 Upper slot Upper Weir Emergency weir
invert elev: 3.5 ft Number of slots: 0 Number of we 0 Invert: 5.500 ft Invert: 0.00 ft Invert: 0.000 ft W: 12.00 ft
B: 0.00 ft B: 0.00 ft
hslot 0.000 ft
h* H/D-low H/D-mid Qlow-orif Qlow-weir Qtot-low Qmid-orif Qmid-weir Qtot-med Qslot-low Qslot-upp Qlweir Quweir Qemerg Qtot (ft) - - (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs)

0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

1.000 10.667 0.000 0.033 0.330 0.033 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.033

2.000 21.333 0.000 0.047 0.472 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047

2.750 29.333 0.000 0.056 0.556 0.056 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.056

3.000 32.000 0.000 0.058 0.581 0.058 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.058

3.083 32.889 0.000 0.059 0.589 0.059 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.059

3.167 33.778 0.000 0.060 0.597 0.060 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.060

3.250 34.667 0.000 0.060 0.605 0.060 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.060

3.333 35.556 0.000 0.061 0.613 0.061 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.061

3.417 36.444 0.000 0.062 0.620 0.062 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.062

3.500 37.333 0.000 0.063 0.628 0.063 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.063

3.583 38.222 0.667 0.064 0.635 0.064 0.009 0.007 0.007 0.000 0.000 0.000 0.000 0.000 0.071

3.667 39.111 1.333 0.064 0.643 0.064 0.019 0.022 0.019 0.000 0.000 0.000 0.000 0.000 0.084

3.750 40.000 2.000 0.065 0.650 0.065 0.026 0.035 0.026 0.000 0.000 0.000 0.000 0.000 0.091

3.833 40.889 2.667 0.066 0.658 0.066 0.031 0.039 0.031 0.000 0.000 0.000 0.000 0.000 0.097

3.917 41.778 3.333 0.066 0.665 0.066 0.036 0.041 0.036 0.000 0.000 0.000 0.000 0.000 0.102

4.000 42.667 4.000 0.067 0.672 0.067 0.040 0.065 0.040 0.000 0.000 0.000 0.000 0.000 0.107

4.083 43.556 4.667 0.068 0.679 0.068 0.043 0.163 0.043 0.000 0.000 0.000 0.000 0.000 0.111

4.167 44.444 5.333 0.069 0.686 0.069 0.047 0.416 0.047 0.000 0.000 0.000 0.000 0.000 0.115

4.250 45.333 6.000 0.069 0.693 0.069 0.050 0.947 0.050 0.000 0.000 0.000 0.000 0.000 0.119

4.333 46.222 6.667 0.070 0.700 0.070 0.053 1.927 0.053 0.000 0.000 0.000 0.000 0.000 0.123

4.417 47.111 7.333 0.071 0.706 0.071 0.056 3.577 0.056 0.000 0.000 0.000 0.000 0.000 0.126

4.500 48.000 8.000 0.071 0.713 0.071 0.058 6.181 0.058 0.000 0.000 0.000 0.000 0.000 0.129

4.583 48.889 8.667 0.072 0.720 0.072 0.061 10.090 0.061 0.000 0.000 0.000 0.000 0.000 0.133

4.667 49.778 9.333 0.073 0.726 0.073 0.063 15.730 0.063 0.000 0.000 0.000 0.000 0.000 0.136

4.750 50.667 10.000 0.073 0.733 0.073 0.065 23.608 0.065 0.000 0.000 0.000 0.000 0.000 0.139

4.833 51.556 10.667 0.074 0.739 0.074 0.068 34.320 0.068 0.000 0.000 0.000 0.000 0.000 0.142

4.917 52.444 11.333 0.075 0.746 0.075 0.070 48.558 0.070 0.000 0.000 0.000 0.000 0.000 0.144

5.000 53.333 12.000 0.075 0.752 0.075 0.072 67.115 0.072 0.000 0.000 0.000 0.000 0.000 0.147

5.083 54.222 12.667 0.076 0.758 0.076 0.074 90.894 0.074 0.000 0.000 0.000 0.000 0.000 0.150

5.167 55.111 13.333 0.076 0.765 0.076 0.076 120.916 0.076 0.000 0.000 0.000 0.000 0.000 0.153

5.250 56.000 14.000 0.077 0.771 0.077 0.078 158.325 0.078 0.000 0.000 0.000 0.000 0.000 0.155

5.333 56.889 14.667 0.078 0.777 0.078 0.080 204.393 0.080 0.000 0.000 0.000 0.000 0.000 0.158

5.417 57.778 15.333 0.078 0.783 0.078 0.082 260.533 0.082 0.000 0.000 0.000 0.000 0.000 0.160

5.500 58.667 16.000 0.079 0.789 0.079 0.084 328.301 0.084 0.000 0.000 0.000 0.000 0.000 0.163

5.583 59.556 16.667 0.080 0.795 0.080 0.085 409.404 0.085 0.000 0.000 0.000 0.000 0.895 1.060

5.667 60.444 17.333 0.080 0.801 0.080 0.087 505.709 0.087 0.000 0.000 0.000 0.000 2.531 2.698

5.750 61.333 18.000 0.081 0.807 0.081 0.089 619.245 0.089 0.000 0.000 0.000 0.000 4.650 4.820

5.833 62.222 18.667 0.081 0.813 0.081 0.091 752.218 0.091 0.000 0.000 0.000 0.000 7.159 7.331

5.917 63.111 19.333 0.082 0.819 0.082 0.092 907.010 0.092 0.000 0.000 0.000 0.000 10.005 10.179

6.000 64.000 20.000 0.082 0.824 0.082 0.094 1086.192 0.094 0.000 0.000 0.000 0.000 13.152 13.328

6.083 64.889 20.667 0.083 0.830 0.083 0.095 1292.525 0.095 0.000 0.000 0.000 0.000 16.574 16.752

6.167 65.778 21.333 0.084 0.836 0.084 0.097 1528.975 0.097 0.000 0.000 0.000 0.000 20.249 20.430

6.250 66.667 22.000 0.084 0.842 0.084 0.098 1798.711 0.098 0.000 0.000 0.000 0.000 24.162 24.345

6.333 67.556 22.667 0.085 0.847 0.085 0.100 2105.119 0.100 0.000 0.000 0.000 0.000 28.299 28.484

6.417 68.444 23.333 0.085 0.853 0.085 0.101 2451.805 0.101 0.000 0.000 0.000 0.000 32.648 32.835

6.500 69.333 24.000 0.086 0.858 0.086 0.103 2842.605 0.103 0.000 0.000 0.000 0.000 37.200 37.389 *Note: h = head above the invert of the
lowest surface discharge opening.

Stage-Storage for BMP-4
Elevation (ft) Area (ft2) Volume (ft3)

0.00 15085 0 BOTTOM OF GRAVEL LAYER (0.4 Voids)

1.00 15085 6034 TOP OF GRAVEL LAYER

2.00 15085 10560

3.75 15085 18479 TOP OF AMMENDED SOILS LAYER(0.3Voids)

4.00 15085 19611 TOP OF MULCH(1)

4.08 15368 20879

4.17 15509 22166

4.25 15652 23464

4.33 15796 24775

4.42 15942 26097

4.50 16088 27432 SURFACE DISCHARGE(2) (FIRST OUTLET)

4.58 16236 28778

4.67 16385 30138

4.75 16535 31509

4.83 16687 32894

4.92 16840 34291

5.00 16994 35700

5.08 17149 37123

5.17 17305 38558

5.25 17463 40007

5.33 17622 41469

5.42 17782 42944

5.50 17944 44433

5.58 18106 45935

5.67 18270 47451

5.75 18436 48980

5.83 18602 50523

5.92 18770 52080

6.00 18938 53652

6.08 19109 55237

6.17 19280 56836

6.25 19453 58450

6.33 19626 60079

6.42 19801 61721

6.50 19978 63379

6.58 20155 65051

6.67 20334 66738

6.75 20514 68440

6.83 20695 70157

6.92 20878 71889

7.00 21062 73637 Surface Discharge (2nd Outlet)

7.08 21247 75400

7.17 21433 77178

7.25 21620 78972

7.33 21809 80782

7.42 21999 82607

7.50 22190 84448

7.58 22383 86305

7.67 22576 88179

7.75 22771 90068

7.83 22967 91974

7.92 23165 93896

8.00 23363 95835

8.08 23563 97790

8.17 23764 99762

8.25 23967 101751

8.33 24170 103756

8.42 24375 105779

8.50 24581 107819

8.58 24788 109876

8.67 24997 111950

8.75 25207 114042 SURFACE DISCHARGE (TOP OF RISER)

8.83 25418 116152

8.92 25630 118278

9.00 25843 120423

9.08 26058 122586

9.17 26274 124766

9.25 26491 126965

9.33 26710 129182

9.42 26929 131416

9.50 27150 133670

9.58 27372 135942

9.67 27596 138232

9.75 27820 140541

9.83 28046 142869

9.92 28273 145215

10.00 28502 147581
(1): The area at this surface elevation corresponds to the area of gravel and amended soil (Bio- filtration layer)
(2): Volume at this elevation coresponds with surface volume for WQ purposes (invert of lowest surface outlet)
Outlet structure for Discharge of BMP 4 Page# 1
Discharge vs Elevation Table Note: 0.00 is the invert of the French Drain Low orifice 2.25 " Lower slot Lower Weir
Number of orif: 1 Number of slots: 1 Number of weirs: 0 Cg-low: 0.61 Invert: 7.00 ft Invert: 0.000 ft
B 2.00 ft B: 0.000 ft
Middle orifice 1.750 " hslot 0.250 ft
Number of orif: 1.000
Cg-middle: 0.61 Upper slot Upper Weir Emergency weir
invert elev: 4.50 ft Number of slots: 0 Number of weirs: 0 Invert: 8.750 ft Invert: 0.00 ft Invert: 0.000 ft W: 12.00 ft
B: 0.00 ft B: 0.00 ft
hslot 0.000 ft
h* H/D-low H/D-mid Qlow-orif Qlow-weir Qtot-low Qmid-orif Qmid-weir Qtot-med Qslot-low Qslot-upp Qlweir Quweir Qemerg Qtot (ft) - - (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs)

0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

1.000 5.333 0.000 0.129 1.145 0.129 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.129

2.000 10.667 0.000 0.187 1.866 0.187 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.187

3.750 20.000 0.000 0.258 2.585 0.258 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.258

4.000 21.333 0.000 0.267 2.671 0.267 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.267

4.083 21.778 0.000 0.270 2.700 0.270 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.270

4.167 22.222 0.000 0.273 2.728 0.273 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.273

4.250 22.667 0.000 0.276 2.756 0.276 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.276

4.333 23.111 0.000 0.278 2.783 0.278 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.278

4.417 23.556 0.000 0.281 2.810 0.281 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.281

4.500 24.000 0.000 0.284 2.837 0.284 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.284

4.583 24.444 0.571 0.286 2.864 0.286 0.008 0.008 0.008 0.000 0.000 0.000 0.000 0.000 0.294

4.667 24.889 1.143 0.289 2.890 0.289 0.025 0.026 0.025 0.000 0.000 0.000 0.000 0.000 0.314

4.750 25.333 1.714 0.292 2.917 0.292 0.034 0.044 0.034 0.000 0.000 0.000 0.000 0.000 0.326

4.833 25.778 2.286 0.294 2.943 0.294 0.042 0.055 0.042 0.000 0.000 0.000 0.000 0.000 0.336

4.917 26.222 2.857 0.297 2.968 0.297 0.048 0.057 0.048 0.000 0.000 0.000 0.000 0.000 0.345

5.000 26.667 3.429 0.299 2.994 0.299 0.053 0.062 0.053 0.000 0.000 0.000 0.000 0.000 0.353

5.083 27.111 4.000 0.302 3.019 0.302 0.058 0.096 0.058 0.000 0.000 0.000 0.000 0.000 0.360

5.167 27.556 4.571 0.304 3.044 0.304 0.063 0.208 0.063 0.000 0.000 0.000 0.000 0.000 0.367

5.250 28.000 5.143 0.307 3.069 0.307 0.067 0.472 0.067 0.000 0.000 0.000 0.000 0.000 0.374

5.333 28.444 5.714 0.309 3.094 0.309 0.071 0.993 0.071 0.000 0.000 0.000 0.000 0.000 0.381

5.417 28.889 6.286 0.312 3.118 0.312 0.075 1.912 0.075 0.000 0.000 0.000 0.000 0.000 0.387

5.500 29.333 6.857 0.314 3.143 0.314 0.079 3.408 0.079 0.000 0.000 0.000 0.000 0.000 0.393

5.583 29.778 7.429 0.317 3.167 0.317 0.082 5.708 0.082 0.000 0.000 0.000 0.000 0.000 0.399

5.667 30.222 8.000 0.319 3.191 0.319 0.086 9.087 0.086 0.000 0.000 0.000 0.000 0.000 0.405

5.750 30.667 8.571 0.321 3.215 0.321 0.089 13.873 0.089 0.000 0.000 0.000 0.000 0.000 0.410

5.833 31.111 9.143 0.324 3.238 0.324 0.092 20.456 0.092 0.000 0.000 0.000 0.000 0.000 0.416

5.917 31.556 9.714 0.326 3.262 0.326 0.095 29.288 0.095 0.000 0.000 0.000 0.000 0.000 0.421

6.000 32.000 10.286 0.328 3.285 0.328 0.098 40.891 0.098 0.000 0.000 0.000 0.000 0.000 0.426

6.083 32.444 10.857 0.331 3.308 0.331 0.100 55.860 0.100 0.000 0.000 0.000 0.000 0.000 0.431

6.167 32.889 11.429 0.333 3.331 0.333 0.103 74.868 0.103 0.000 0.000 0.000 0.000 0.000 0.436

6.250 33.333 12.000 0.335 3.354 0.335 0.106 98.670 0.106 0.000 0.000 0.000 0.000 0.000 0.441

6.333 33.778 12.571 0.338 3.376 0.338 0.108 128.110 0.108 0.000 0.000 0.000 0.000 0.000 0.446

6.417 34.222 13.143 0.340 3.399 0.340 0.111 164.126 0.111 0.000 0.000 0.000 0.000 0.000 0.451

6.500 34.667 13.714 0.342 3.421 0.342 0.114 207.749 0.114 0.000 0.000 0.000 0.000 0.000 0.456

6.583 35.111 14.286 0.344 3.443 0.344 0.116 260.115 0.116 0.000 0.000 0.000 0.000 0.000 0.460

6.667 35.556 14.857 0.347 3.465 0.347 0.118 322.467 0.118 0.000 0.000 0.000 0.000 0.000 0.465

6.750 36.000 15.429 0.349 3.487 0.349 0.121 396.158 0.121 0.000 0.000 0.000 0.000 0.000 0.469

6.833 36.444 16.000 0.351 3.509 0.351 0.123 482.658 0.123 0.000 0.000 0.000 0.000 0.000 0.474

6.917 36.889 16.571 0.353 3.531 0.353 0.125 583.558 0.125 0.000 0.000 0.000 0.000 0.000 0.478

7.000 37.333 17.143 0.355 3.552 0.355 0.127 700.574 0.127 0.000 0.000 0.000 0.000 0.000 0.483

7.083 37.778 17.714 0.357 3.573 0.357 0.130 835.554 0.130 0.149 0.000 0.000 0.000 0.000 0.636

7.167 38.222 18.286 0.359 3.595 0.359 0.132 990.480 0.132 0.422 0.000 0.000 0.000 0.000 0.913

7.250 38.667 18.857 0.362 3.616 0.362 0.134 1167.474 0.134 0.775 0.000 0.000 0.000 0.000 1.270

7.333 39.111 19.429 0.364 3.637 0.364 0.136 1368.803 0.136 1.117 0.000 0.000 0.000 0.000 1.617

7.417 39.556 20.000 0.366 3.658 0.366 0.138 1596.884 0.138 1.322 0.000 0.000 0.000 0.000 1.826

7.500 40.000 20.571 0.368 3.678 0.368 0.140 1854.288 0.140 1.499 0.000 0.000 0.000 0.000 2.007

7.583 40.444 21.143 0.370 3.699 0.370 0.142 2143.746 0.142 1.657 0.000 0.000 0.000 0.000 2.169

7.667 40.889 21.714 0.372 3.720 0.372 0.144 2468.150 0.144 1.801 0.000 0.000 0.000 0.000 2.317

7.750 41.333 22.286 0.374 3.740 0.374 0.146 2830.563 0.146 1.935 0.000 0.000 0.000 0.000 2.455

7.833 41.778 22.857 0.376 3.760 0.376 0.148 3234.220 0.148 2.060 0.000 0.000 0.000 0.000 2.584

7.917 42.222 23.429 0.378 3.781 0.378 0.150 3682.536 0.150 2.178 0.000 0.000 0.000 0.000 2.705

8.000 42.667 24.000 0.380 3.801 0.380 0.151 4179.106 0.151 2.290 0.000 0.000 0.000 0.000 2.821

8.083 43.111 24.571 0.382 3.821 0.382 0.153 4727.716 0.153 2.396 0.000 0.000 0.000 0.000 2.931

8.167 43.556 25.143 0.384 3.840 0.384 0.155 5332.340 0.155 2.498 0.000 0.000 0.000 0.000 3.037

8.250 44.000 25.714 0.386 3.860 0.386 0.157 5997.152 0.157 2.596 0.000 0.000 0.000 0.000 3.139

8.333 44.444 26.286 0.388 3.880 0.388 0.159 6726.528 0.159 2.691 0.000 0.000 0.000 0.000 3.237

8.417 44.889 26.857 0.390 3.899 0.390 0.160 7525.049 0.160 2.782 0.000 0.000 0.000 0.000 3.332

8.500 45.333 27.429 0.392 3.919 0.392 0.162 8397.508 0.162 2.870 0.000 0.000 0.000 0.000 3.424

8.583 45.778 28.000 0.394 3.938 0.394 0.164 9348.915 0.164 2.956 0.000 0.000 0.000 0.000 3.513

8.667 46.222 28.571 0.396 3.958 0.396 0.165 10384.500 0.165 3.039 0.000 0.000 0.000 0.000 3.600

8.750 46.667 29.143 0.398 3.977 0.398 0.167 11509.718 0.167 3.120 0.000 0.000 0.000 0.000 3.685

8.833 47.111 29.714 0.400 3.996 0.400 0.169 12730.254 0.169 3.199 0.000 0.000 0.000 0.895 4.662

8.917 47.556 30.286 0.401 4.015 0.401 0.170 14052.031 0.170 3.276 0.000 0.000 0.000 2.531 6.379

9.000 48.000 30.857 0.403 4.034 0.403 0.172 15481.209 0.172 3.352 0.000 0.000 0.000 4.650 8.577

9.083 48.444 31.429 0.405 4.053 0.405 0.174 17024.193 0.174 3.425 0.000 0.000 0.000 7.159 11.163

9.167 48.889 32.000 0.407 4.071 0.407 0.175 18687.639 0.175 3.497 0.000 0.000 0.000 10.005 14.085

9.250 49.333 32.571 0.409 4.090 0.409 0.177 20478.455 0.177 3.568 0.000 0.000 0.000 13.152 17.306 *Note: h = head above the invert of the
lowest surface discharge opening.

9.333 49.778 33.143 0.411 4.109 0.411 0.178 22403.810 0.178 3.637 0.000 0.000 0.000 16.574 20.800 Page# 2

9.417 50.222 33.714 0.413 4.127 0.413 0.180 24471.134 0.180 3.705 0.000 0.000 0.000 20.249 24.547

9.500 50.667 34.286 0.415 4.145 0.415 0.181 26688.127 0.181 3.772 0.000 0.000 0.000 24.162 28.530

9.583 51.111 34.857 0.416 4.164 0.416 0.183 29062.763 0.183 3.838 0.000 0.000 0.000 28.299 32.736

9.667 51.556 35.429 0.418 4.182 0.418 0.185 31603.293 0.185 3.902 0.000 0.000 0.000 32.648 37.153

9.750 52.000 36.000 0.420 4.200 0.420 0.186 34318.249 0.186 3.966 0.000 0.000 0.000 37.200 41.772

9.833 52.444 36.571 0.422 4.218 0.422 0.188 37216.453 0.188 4.028 0.000 0.000 0.000 41.946 46.583

9.917 52.889 37.143 0.424 4.236 0.424 0.189 40307.019 0.189 4.090 0.000 0.000 0.000 46.877 51.580

10.000 53.333 37.714 0.425 4.254 0.425 0.190 43599.355 0.190 4.150 0.000 0.000 0.000 51.989 56.755 Sycamore Hills Business Center
HMP Analysis

APPENDIX 7: MODIFIED-PULS RESULTS

Sycamore Hills Business Center
Drainage Study

THIS PAGE INTENTIONALLY LEFT BLANK FOR DOUBLE SIDED PRINTING MODIFIED PULS-DMA-2A page # 1
RESULTS: Routing of 24 hr - 2 yr Total Hydrograph in Underground Storage Max outflow: 0.168 cfs initial elev: 0.0 ft
Max elevation in pond: 3.369 ft (from top of gravel) Peak flow in: 0.95 cfs Vol-out: 15236 cu-ft Vol in: 25183 cu-ft
Pond Storm: 24 hr - 2 yr
time Inflow, In In+In+1 fn Inf. Vol, F 2S1/At-O1 2S2/At+O2 Outflow, On Volume, S Elevation, h (hr) (cfs) (cfs) (cfs) (ft3) (cfs) (cfs) (cfs) (ft3) (ft-osl)

0.00 0.000 0.06 0.00 0.0 0.00 0.000 0 0.00

0.25 0.056 0.14 0.000 0.0 0.05 0.06 0.001 25 0.01

0.50 0.084 0.17 0.000 0.0 0.19 0.19 0.002 86 0.03

0.75 0.084 0.20 0.000 0.0 0.35 0.36 0.004 159 0.05

1.00 0.112 0.20 0.000 0.0 0.53 0.54 0.007 242 0.07

1.25 0.084 0.17 0.000 0.0 0.71 0.73 0.010 322 0.09

1.50 0.084 0.17 0.000 0.0 0.85 0.87 0.014 387 0.11

1.75 0.084 0.20 0.000 0.0 0.98 1.01 0.018 448 0.13

2.00 0.112 0.22 0.000 0.0 1.13 1.17 0.022 518 0.15

2.25 0.112 0.22 0.000 0.0 1.30 1.35 0.026 597 0.18

2.50 0.112 0.25 0.000 0.0 1.47 1.52 0.029 673 0.20

2.75 0.140 0.28 0.000 0.0 1.66 1.72 0.031 760 0.22

3.00 0.140 0.28 0.000 0.0 1.87 1.94 0.035 856 0.25

3.25 0.140 0.28 0.000 0.0 2.07 2.15 0.037 950 0.28

3.50 0.140 0.28 0.000 0.0 2.27 2.35 0.039 1041 0.31

3.75 0.140 0.31 0.000 0.0 2.47 2.55 0.042 1131 0.33

4.00 0.168 0.34 0.000 0.0 2.69 2.78 0.044 1231 0.36

4.25 0.168 0.36 0.000 0.0 2.93 3.03 0.046 1341 0.39

4.50 0.196 0.39 0.000 0.0 3.20 3.30 0.049 1462 0.43

4.75 0.196 0.42 0.000 0.0 3.49 3.59 0.051 1593 0.47

5.00 0.224 0.39 0.000 0.0 3.80 3.91 0.054 1735 0.51

5.25 0.168 0.36 0.000 0.0 4.08 4.19 0.056 1861 0.55

5.50 0.196 0.42 0.000 0.0 4.33 4.44 0.058 1974 0.58

5.75 0.224 0.45 0.000 0.0 4.63 4.75 0.060 2109 0.62

6.00 0.224 0.48 0.000 0.0 4.95 5.07 0.063 2255 0.66

6.25 0.252 0.50 0.000 0.0 5.29 5.42 0.065 2411 0.71

6.50 0.252 0.53 0.000 0.0 5.66 5.80 0.068 2578 0.76

6.75 0.280 0.56 0.000 0.0 6.05 6.19 0.070 2755 0.81

7.00 0.280 0.56 0.000 0.0 6.47 6.61 0.073 2943 0.87

7.25 0.280 0.59 0.000 0.0 6.88 7.03 0.075 3128 0.92

7.50 0.308 0.64 0.000 0.0 7.31 7.46 0.078 3324 0.98

7.75 0.336 0.70 0.000 0.0 7.79 7.95 0.080 3542 1.04

8.00 0.364 0.78 0.000 0.0 8.32 8.49 0.083 3783 1.11

8.25 0.420 0.84 0.000 0.0 8.93 9.11 0.087 4059 1.19

8.50 0.420 0.87 0.000 0.0 9.59 9.77 0.090 4358 1.28

8.75 0.448 0.92 0.000 0.0 10.27 10.46 0.093 4666 1.37

9.00 0.476 1.01 0.000 0.0 11.00 11.20 0.097 4996 1.47

9.25 0.532 1.09 0.000 0.0 11.81 12.01 0.099 5361 1.54

9.50 0.560 1.15 0.000 0.0 12.70 12.91 0.101 5762 1.59

9.75 0.588 1.20 0.000 0.0 13.65 13.85 0.103 6187 1.65

10.00 0.616 1.04 0.000 0.0 14.64 14.85 0.105 6635 1.72

10.25 0.420 0.84 0.000 0.0 15.46 15.67 0.106 7006 1.77

10.50 0.420 0.98 0.000 0.0 16.09 16.30 0.108 7287 1.81

10.75 0.560 1.12 0.000 0.0 16.85 17.06 0.109 7630 1.86

11.00 0.560 1.09 0.000 0.0 17.74 17.97 0.111 8035 1.92

11.25 0.532 1.06 0.000 0.0 18.61 18.83 0.113 8425 1.97
Pond Storm: 24 hr - 2 yr (Cont) Routing of 24 hr - 2 yr Total Hydrograph in Underground Storage page # 2 time Inflow, In In+In+1 fn Inf. Vol, F 2S1/At-O1 2S2/At+O2 Outflow, On Volume, S Elevation, h (hr) (cfs) (cfs) (cfs) (ft3) (cfs) (cfs) (cfs) (ft3) (ft-osl)

11.50 0.532 1.01 0.000 0.0 19.44 19.67 0.114 8801 2.02

11.75 0.476 0.98 0.000 0.0 20.22 20.45 0.116 9151 2.07

12.00 0.504 1.20 0.000 0.0 20.97 21.20 0.117 9487 2.12

12.25 0.700 1.43 0.000 0.0 21.93 22.17 0.119 9923 2.18

12.50 0.728 1.51 0.000 0.0 23.12 23.36 0.121 10457 2.26

12.75 0.783 1.59 0.000 0.0 24.38 24.63 0.123 11027 2.34

13.00 0.811 1.76 0.000 0.0 25.73 25.98 0.126 11633 2.43

13.25 0.951 1.90 0.000 0.0 27.23 27.49 0.128 12312 2.53

13.50 0.951 1.59 0.000 0.0 28.87 29.13 0.131 13052 2.64

13.75 0.644 1.29 0.000 0.0 30.20 30.47 0.133 13650 2.72

14.00 0.644 1.40 0.000 0.0 31.22 31.49 0.135 14109 2.79

14.25 0.755 1.48 0.000 0.0 32.34 32.62 0.137 14617 2.86

14.50 0.728 1.46 0.000 0.0 33.55 33.83 0.139 15160 2.94

14.75 0.728 1.43 0.000 0.0 34.72 35.01 0.140 15689 3.02

15.00 0.700 1.37 0.000 0.0 35.87 36.15 0.142 16204 3.10

15.25 0.672 1.32 0.000 0.0 36.95 37.24 0.144 16692 3.17

15.50 0.644 1.18 0.000 0.0 37.96 38.26 0.151 17151 3.24

15.75 0.532 1.06 0.000 0.0 38.82 39.14 0.159 17540 3.30

16.00 0.532 0.64 0.000 0.0 39.55 39.88 0.166 17872 3.35

16.25 0.112 0.22 0.000 0.0 39.86 40.19 0.168 18012 3.37

16.50 0.112 0.20 0.000 0.0 39.75 40.08 0.167 17962 3.36

16.75 0.084 0.17 0.000 0.0 39.61 39.94 0.166 17900 3.35

17.00 0.084 0.22 0.000 0.0 39.45 39.78 0.165 17827 3.34

17.25 0.140 0.28 0.000 0.0 39.35 39.67 0.164 17780 3.33

17.50 0.140 0.28 0.000 0.0 39.30 39.63 0.164 17758 3.33

17.75 0.140 0.25 0.000 0.0 39.25 39.58 0.164 17736 3.33

18.00 0.112 0.22 0.000 0.0 39.18 39.50 0.163 17703 3.32

18.25 0.112 0.22 0.000 0.0 39.08 39.40 0.162 17657 3.32

18.50 0.112 0.20 0.000 0.0 38.98 39.30 0.161 17613 3.31

18.75 0.084 0.14 0.000 0.0 38.85 39.17 0.160 17557 3.30

19.00 0.056 0.14 0.000 0.0 38.68 38.99 0.158 17477 3.29

19.25 0.084 0.20 0.000 0.0 38.51 38.82 0.156 17398 3.28

19.50 0.112 0.20 0.000 0.0 38.39 38.70 0.155 17346 3.27

19.75 0.084 0.14 0.000 0.0 38.28 38.59 0.154 17295 3.26

20.00 0.056 0.14 0.000 0.0 38.11 38.42 0.153 17220 3.25

20.25 0.084 0.17 0.000 0.0 37.95 38.25 0.151 17146 3.24

20.50 0.084 0.17 0.000 0.0 37.82 38.12 0.150 17086 3.23

20.75 0.084 0.14 0.000 0.0 37.69 37.99 0.150 17026 3.22

21.00 0.056 0.14 0.000 0.0 37.53 37.83 0.148 16955 3.21

21.25 0.084 0.14 0.000 0.0 37.38 37.67 0.147 16885 3.20

21.50 0.056 0.14 0.000 0.0 37.22 37.52 0.146 16816 3.19

21.75 0.084 0.14 0.000 0.0 37.07 37.36 0.145 16748 3.18

22.00 0.056 0.14 0.000 0.0 36.92 37.21 0.144 16681 3.17

22.25 0.084 0.14 0.000 0.0 36.78 37.06 0.144 16614 3.16

22.50 0.056 0.11 0.000 0.0 36.63 36.92 0.143 16548 3.15

22.75 0.056 0.11 0.000 0.0 36.46 36.74 0.143 16469 3.14

23.00 0.056 0.11 0.000 0.0 36.28 36.57 0.143 16391 3.13

23.25 0.056 0.11 0.000 0.0 36.11 36.39 0.143 16313 3.11

23.50 0.056 0.11 0.000 0.0 35.94 36.22 0.142 16235 3.10

23.75 0.056 0.11 0.000 0.0 35.76 36.05 0.142 16157 3.09

24.00 0.056 0.06 0.000 0.0 35.59 35.88 0.142 16080 3.08

24.25 0.000 0.00 0.000 0.0 35.36 35.65 0.141 15978 3.06 Pond Storm: 24 hr - 2 yr (Cont) Routing of 24 hr - 2 yr Total Hydrograph in Underground Storage page # 3 time Inflow, In In+In+1 fn Inf. Vol, F 2S1/At-O1 2S2/At+O2 Outflow, On Volume, S Elevation, h (hr) (cfs) (cfs) (cfs) (ft3) (cfs) (cfs) (cfs) (ft3) (ft-osl)

24.50 0.000 0.00 0.000 0.0 35.08 35.36 0.141 15851 3.05

24.75 0.000 0.00 0.000 0.0 34.80 35.08 0.141 15724 3.03

25.00 0.000 0.00 0.000 0.0 34.52 34.80 0.140 15598 3.01

25.25 0.000 0.00 0.000 0.0 34.24 34.52 0.140 15472 2.99

25.50 0.000 0.00 0.000 0.0 33.96 34.24 0.139 15346 2.97

25.75 0.000 0.00 0.000 0.0 33.69 33.96 0.139 15221 2.95

26.00 0.000 0.00 0.000 0.0 33.41 33.69 0.138 15096 2.94

26.25 0.000 0.00 0.000 0.0 33.13 33.41 0.138 14972 2.92

26.50 0.000 0.00 0.000 0.0 32.86 33.13 0.137 14848 2.90

26.75 0.000 0.00 0.000 0.0 32.58 32.86 0.137 14725 2.88

27.00 0.000 0.00 0.000 0.0 32.31 32.58 0.137 14602 2.86

27.25 0.000 0.00 0.000 0.0 32.04 32.31 0.136 14479 2.84

27.50 0.000 0.00 0.000 0.0 31.77 32.04 0.136 14357 2.83

27.75 0.000 0.00 0.000 0.0 31.50 31.77 0.135 14235 2.81

28.00 0.000 0.00 0.000 0.0 31.23 31.50 0.135 14113 2.79

28.25 0.000 0.00 0.000 0.0 30.96 31.23 0.134 13992 2.77

28.50 0.000 0.00 0.000 0.0 30.69 30.96 0.134 13871 2.76

28.75 0.000 0.00 0.000 0.0 30.42 30.69 0.133 13751 2.74

29.00 0.000 0.00 0.000 0.0 30.16 30.42 0.133 13631 2.72

29.25 0.000 0.00 0.000 0.0 29.89 30.16 0.133 13512 2.70

29.50 0.000 0.00 0.000 0.0 29.63 29.89 0.132 13393 2.69

29.75 0.000 0.00 0.000 0.0 29.37 29.63 0.132 13274 2.67

30.00 0.000 0.00 0.000 0.0 29.10 29.37 0.131 13155 2.65

30.25 0.000 0.00 0.000 0.0 28.84 29.10 0.131 13037 2.63

30.50 0.000 0.00 0.000 0.0 28.58 28.84 0.130 12920 2.62

30.75 0.000 0.00 0.000 0.0 28.32 28.58 0.130 12803 2.60

31.00 0.000 0.00 0.000 0.0 28.06 28.32 0.130 12686 2.58

31.25 0.000 0.00 0.000 0.0 27.80 28.06 0.129 12570 2.57

31.50 0.000 0.00 0.000 0.0 27.55 27.80 0.129 12454 2.55

31.75 0.000 0.00 0.000 0.0 27.29 27.55 0.128 12338 2.53

32.00 0.000 0.00 0.000 0.0 27.03 27.29 0.128 12223 2.52

32.25 0.000 0.00 0.000 0.0 26.78 27.03 0.127 12108 2.50

32.50 0.000 0.00 0.000 0.0 26.53 26.78 0.127 11994 2.48

32.75 0.000 0.00 0.000 0.0 26.27 26.53 0.126 11880 2.47

33.00 0.000 0.00 0.000 0.0 26.02 26.27 0.126 11766 2.45

33.25 0.000 0.00 0.000 0.0 25.77 26.02 0.126 11653 2.43

33.50 0.000 0.00 0.000 0.0 25.52 25.77 0.125 11540 2.42

33.75 0.000 0.00 0.000 0.0 25.27 25.52 0.125 11427 2.40

34.00 0.000 0.00 0.000 0.0 25.02 25.27 0.124 11315 2.38

34.25 0.000 0.00 0.000 0.0 24.77 25.02 0.124 11204 2.37

34.50 0.000 0.00 0.000 0.0 24.53 24.77 0.123 11092 2.35

34.75 0.000 0.00 0.000 0.0 24.28 24.53 0.123 10981 2.34

35.00 0.000 0.00 0.000 0.0 24.04 24.28 0.123 10871 2.32

35.25 0.000 0.00 0.000 0.0 23.79 24.04 0.122 10761 2.30

35.50 0.000 0.00 0.000 0.0 23.55 23.79 0.122 10651 2.29

35.75 0.000 0.00 0.000 0.0 23.30 23.55 0.121 10542 2.27

36.00 0.000 0.00 0.000 0.0 23.06 23.30 0.121 10433 2.26

36.25 0.000 0.00 0.000 0.0 22.82 23.06 0.120 10324 2.24

36.50 0.000 0.00 0.000 0.0 22.58 22.82 0.120 10216 2.23

36.75 0.000 0.00 0.000 0.0 22.34 22.58 0.120 10108 2.21

37.00 0.000 0.00 0.000 0.0 22.11 22.34 0.119 10001 2.20

37.25 0.000 0.00 0.000 0.0 22.11 22.11
MODIFIED PULS-DMA-2B BASIN-1 page # 1
RESULTS: Routing of 24 hr - 2 yr Total Hydrograph in Basin-1 Max outflow: 1.268 cfs initial elev: 0.0 ft
Max elevation in pond: 7.041 ft (from bottom of gravel) Peak flow in: 1.21 cfs Vol-out: 30164 cu-ft Vol in: 32122 cu-ft
Pond Storm: 24 hr - 2 yr
time Inflow, In In+In+1 fn Inf. Vol, F 2S1/At-O1 2S2/At+O2 Outflow, On Volume, S Elevation, h TO POD-2 TO Basin 2 (hr) (cfs) (cfs) (cfs) (ft3) (cfs) (cfs) (cfs) (ft3) (ft-osl) (cfs) (cfs)

0.00 0.000 0.07 0.00 0.0 0.00 0.000 0 0.00 0.000 0.000

0.25 0.071 0.18 0.000 0.0 0.07 0.07 0.002 31 0.04 0.002 0.000

0.50 0.107 0.21 0.000 0.0 0.24 0.25 0.005 109 0.15 0.005 0.000

0.75 0.107 0.25 0.000 0.0 0.44 0.45 0.007 199 0.27 0.007 0.000

1.00 0.143 0.25 0.000 0.0 0.67 0.69 0.009 304 0.42 0.009 0.000

1.25 0.107 0.21 0.000 0.0 0.89 0.92 0.011 408 0.55 0.011 0.000

1.50 0.107 0.21 0.000 0.0 1.08 1.11 0.012 494 0.68 0.012 0.000

1.75 0.107 0.25 0.000 0.0 1.27 1.30 0.013 579 0.79 0.013 0.000

2.00 0.143 0.29 0.000 0.0 1.49 1.52 0.014 679 0.93 0.014 0.000

2.25 0.143 0.29 0.000 0.0 1.75 1.78 0.016 794 1.11 0.016 0.000

2.50 0.143 0.32 0.000 0.0 2.00 2.03 0.017 908 1.32 0.017 0.000

2.75 0.178 0.36 0.000 0.0 2.28 2.32 0.019 1036 1.55 0.019 0.000

3.00 0.178 0.36 0.000 0.0 2.60 2.64 0.020 1179 1.81 0.020 0.000

3.25 0.178 0.36 0.000 0.0 2.91 2.96 0.021 1321 2.07 0.021 0.000

3.50 0.178 0.36 0.000 0.0 3.23 3.27 0.023 1462 2.33 0.023 0.000

3.75 0.178 0.39 0.000 0.0 3.54 3.58 0.024 1602 2.58 0.024 0.000

4.00 0.214 0.43 0.000 0.0 3.88 3.93 0.025 1756 2.87 0.025 0.000

4.25 0.214 0.46 0.000 0.0 4.25 4.31 0.027 1925 3.18 0.027 0.000

4.50 0.250 0.50 0.000 0.0 4.66 4.72 0.028 2110 3.51 0.028 0.000

4.75 0.250 0.54 0.000 0.0 5.10 5.16 0.029 2309 3.87 0.029 0.000

5.00 0.286 0.50 0.000 0.0 5.58 5.64 0.030 2523 4.08 0.030 0.000

5.25 0.214 0.46 0.000 0.0 6.01 6.08 0.031 2720 4.19 0.031 0.000

5.50 0.250 0.54 0.000 0.0 6.42 6.48 0.031 2901 4.28 0.031 0.000

5.75 0.286 0.57 0.000 0.0 6.89 6.95 0.031 3114 4.40 0.031 0.000

6.00 0.286 0.61 0.000 0.0 7.37 7.46 0.043 3338 4.52 0.032 0.011

6.25 0.321 0.64 0.000 0.0 7.76 7.98 0.113 3541 4.64 0.032 0.080

6.50 0.321 0.68 0.000 0.0 8.04 8.40 0.179 3699 4.72 0.033 0.146

6.75 0.357 0.71 0.000 0.0 8.28 8.72 0.218 3825 4.79 0.033 0.185

7.00 0.357 0.71 0.000 0.0 8.51 9.00 0.245 3939 4.85 0.033 0.212

7.25 0.357 0.75 0.000 0.0 8.69 9.22 0.264 4031 4.91 0.033 0.231

7.50 0.393 0.82 0.000 0.0 8.88 9.44 0.281 4123 4.96 0.033 0.248

7.75 0.428 0.89 0.000 0.0 9.10 9.70 0.301 4230 5.01 0.034 0.267

8.00 0.464 1.00 0.000 0.0 9.35 9.99 0.321 4352 5.08 0.034 0.287

8.25 0.535 1.07 0.000 0.0 9.66 10.35 0.344 4502 5.16 0.034 0.310

8.50 0.535 1.11 0.000 0.0 10.00 10.73 0.367 4664 5.25 0.034 0.333

8.75 0.571 1.18 0.000 0.0 10.33 11.10 0.389 4822 5.33 0.035 0.354

9.00 0.607 1.28 0.000 0.0 10.68 11.50 0.410 4992 5.43 0.035 0.375

9.25 0.678 1.39 0.000 0.0 11.10 11.97 0.434 5191 5.54 0.035 0.399

9.50 0.714 1.46 0.000 0.0 11.58 12.49 0.459 5415 5.66 0.036 0.423

9.75 0.750 1.53 0.000 0.0 12.07 13.04 0.484 5650 5.79 0.036 0.448

10.00 0.785 1.32 0.000 0.0 12.59 13.61 0.508 5894 5.93 0.036 0.472

10.25 0.535 1.07 0.000 0.0 12.87 13.91 0.521 6025 5.99 0.037 0.484

10.50 0.535 1.25 0.000 0.0 12.89 13.94 0.522 6037 6.00 0.037 0.486

10.75 0.714 1.43 0.000 0.0 13.08 14.14 0.531 6125 6.05 0.037 0.494

11.00 0.714 1.39 0.000 0.0 13.42 14.51 0.545 6283 6.14 0.037 0.508

11.25 0.678 1.36 0.000 0.0 13.70 14.81 0.557 6414 6.21 0.037 0.520 Runoff
Pond Storm: 24 hr - 2 yr (Cont) Routing of 24 hr - 2 yr Total Hydrograph in Basin-1 page # 2 time Inflow, In In+In+1 fn Inf. Vol, F 2S1/At-O1 2S2/At+O2 Outflow, On Volume, S Elevation, h TO POD-2 TO Basin 2 (hr) (cfs) (cfs) (cfs) (ft3) (cfs) (cfs) (cfs) (ft3) (ft-osl) (cfs) (cfs)

11.50 0.678 1.28 0.000 0.0 13.92 15.05 0.566 6519 6.26 0.037 0.529

11.75 0.607 1.25 0.000 0.0 14.06 15.20 0.572 6584 6.30 0.038 0.534

12.00 0.642 1.53 0.000 0.0 14.16 15.31 0.576 6630 6.32 0.038 0.538

12.25 0.892 1.82 0.000 0.0 14.51 15.69 0.590 6796 6.42 0.038 0.552

12.50 0.928 1.93 0.000 0.0 15.11 16.33 0.613 7074 6.56 0.038 0.575

12.75 0.999 2.03 0.000 0.0 15.76 17.03 0.637 7378 6.73 0.039 0.598

13.00 1.035 2.25 0.000 0.0 16.47 17.79 0.662 7709 6.92 0.039 0.623

13.25 1.213 2.43 0.000 0.0 16.49 18.72 1.116 7921 7.03 0.040 1.076

13.50 1.213 2.03 0.000 0.0 16.38 18.91 1.268 7940 7.04 0.040 1.228

13.75 0.821 1.64 0.000 0.0 16.66 18.41 0.876 7890 7.01 0.040 0.837

14.00 0.821 1.78 0.000 0.0 16.72 18.30 0.790 7879 7.01 0.040 0.750

14.25 0.964 1.89 0.000 0.0 16.60 18.50 0.950 7900 7.02 0.040 0.910

14.50 0.928 1.86 0.000 0.0 16.61 18.50 0.944 7899 7.02 0.040 0.904

14.75 0.928 1.82 0.000 0.0 16.63 18.47 0.919 7896 7.02 0.040 0.880

15.00 0.892 1.75 0.000 0.0 16.64 18.45 0.905 7894 7.02 0.040 0.865

15.25 0.857 1.68 0.000 0.0 16.67 18.39 0.857 7888 7.01 0.040 0.818

15.50 0.821 1.50 0.000 0.0 16.69 18.35 0.828 7884 7.01 0.040 0.789

15.75 0.678 1.36 0.000 0.0 16.78 18.19 0.705 7869 7.00 0.040 0.666

16.00 0.678 0.82 0.000 0.0 16.79 18.14 0.673 7859 7.00 0.040 0.634

16.25 0.143 0.29 0.000 0.0 16.30 17.61 0.656 7630 6.87 0.039 0.617

16.50 0.143 0.25 0.000 0.0 15.34 16.58 0.622 7183 6.63 0.039 0.583

16.75 0.107 0.21 0.000 0.0 14.42 15.59 0.586 6752 6.39 0.038 0.549

17.00 0.107 0.29 0.000 0.0 13.53 14.63 0.550 6337 6.17 0.037 0.513

17.25 0.178 0.36 0.000 0.0 12.78 13.82 0.517 5985 5.97 0.037 0.481

17.50 0.178 0.36 0.000 0.0 12.16 13.14 0.488 5693 5.81 0.036 0.452

17.75 0.178 0.32 0.000 0.0 11.60 12.52 0.460 5427 5.67 0.036 0.425

18.00 0.143 0.29 0.000 0.0 11.06 11.92 0.431 5170 5.53 0.035 0.396

18.25 0.143 0.29 0.000 0.0 10.54 11.34 0.402 4924 5.39 0.035 0.367

18.50 0.143 0.25 0.000 0.0 10.08 10.83 0.373 4704 5.27 0.034 0.338

18.75 0.107 0.18 0.000 0.0 9.64 10.33 0.343 4494 5.16 0.034 0.309

19.00 0.071 0.18 0.000 0.0 9.20 9.82 0.309 4281 5.04 0.034 0.276

19.25 0.107 0.25 0.000 0.0 8.83 9.38 0.277 4098 4.94 0.033 0.243

19.50 0.143 0.25 0.000 0.0 8.58 9.08 0.252 3972 4.87 0.033 0.219

19.75 0.107 0.18 0.000 0.0 8.37 8.83 0.229 3869 4.81 0.033 0.196

20.00 0.071 0.18 0.000 0.0 8.15 8.55 0.201 3756 4.75 0.033 0.168

20.25 0.107 0.21 0.000 0.0 7.99 8.32 0.167 3670 4.71 0.032 0.135

20.50 0.107 0.21 0.000 0.0 7.91 8.20 0.149 3624 4.68 0.032 0.116

20.75 0.107 0.18 0.000 0.0 7.85 8.12 0.136 3593 4.67 0.032 0.104

21.00 0.071 0.18 0.000 0.0 7.79 8.03 0.120 3558 4.65 0.032 0.088

21.25 0.107 0.18 0.000 0.0 7.75 7.96 0.110 3535 4.63 0.032 0.078

21.50 0.071 0.18 0.000 0.0 7.72 7.92 0.103 3519 4.62 0.032 0.071

21.75 0.107 0.18 0.000 0.0 7.70 7.90 0.098 3509 4.62 0.032 0.066

22.00 0.071 0.18 0.000 0.0 7.69 7.88 0.095 3502 4.61 0.032 0.063

22.25 0.107 0.18 0.000 0.0 7.68 7.87 0.093 3498 4.61 0.032 0.061

22.50 0.071 0.14 0.000 0.0 7.67 7.86 0.092 3495 4.61 0.032 0.060

22.75 0.071 0.14 0.000 0.0 7.65 7.82 0.085 3479 4.60 0.032 0.053

23.00 0.071 0.14 0.000 0.0 7.63 7.79 0.080 3469 4.59 0.032 0.048

23.25 0.071 0.14 0.000 0.0 7.62 7.77 0.077 3463 4.59 0.032 0.045

23.50 0.071 0.14 0.000 0.0 7.61 7.76 0.075 3458 4.59 0.032 0.043

23.75 0.071 0.14 0.000 0.0 7.60 7.75 0.074 3455 4.59 0.032 0.042

24.00 0.071 0.07 0.000 0.0 7.60 7.75 0.073 3453 4.59 0.032 0.041

24.25 0.000 0.00 0.000 0.0 7.54 7.67 0.064 3423 4.57 0.032 0.032 Pond Storm: 24 hr - 2 yr (Cont) Routing of 24 hr - 2 yr Total Hydrograph in Basin-1 page # 3 time Inflow, In In+In+1 fn Inf. Vol, F 2S1/At-O1 2S2/At+O2 Outflow, On Volume, S Elevation, h TO POD-2 TO Basin 2 (hr) (cfs) (cfs) (cfs) (ft3) (cfs) (cfs) (cfs) (ft3) (ft-osl) (cfs) (cfs)

24.50 0.000 0.00 0.000 0.0 7.44 7.54 0.051 3372 4.54 0.032 0.019

24.75 0.000 0.00 0.000 0.0 7.36 7.44 0.041 3330 4.52 0.032 0.009

25.00 0.000 0.00 0.000 0.0 7.29 7.36 0.033 3297 4.50 0.032 0.001

25.25 0.000 0.00 0.000 0.0 7.23 7.29 0.032 3268 4.49 0.032 0.000

25.50 0.000 0.00 0.000 0.0 7.17 7.23 0.032 3239 4.47 0.032 0.000

25.75 0.000 0.00 0.000 0.0 7.10 7.17 0.032 3211 4.46 0.032 0.000

26.00 0.000 0.00 0.000 0.0 7.04 7.10 0.032 3182 4.44 0.032 0.000

26.25 0.000 0.00 0.000 0.0 6.98 7.04 0.031 3154 4.43 0.031 0.000

26.50 0.000 0.00 0.000 0.0 6.91 6.98 0.031 3126 4.41 0.031 0.000

26.75 0.000 0.00 0.000 0.0 6.85 6.91 0.031 3097 4.39 0.031 0.000

27.00 0.000 0.00 0.000 0.0 6.79 6.85 0.031 3069 4.38 0.031 0.000

27.25 0.000 0.00 0.000 0.0 6.73 6.79 0.031 3041 4.36 0.031 0.000

27.50 0.000 0.00 0.000 0.0 6.66 6.73 0.031 3013 4.35 0.031 0.000

27.75 0.000 0.00 0.000 0.0 6.60 6.66 0.031 2985 4.33 0.031 0.000

28.00 0.000 0.00 0.000 0.0 6.54 6.60 0.031 2957 4.31 0.031 0.000

28.25 0.000 0.00 0.000 0.0 6.48 6.54 0.031 2929 4.30 0.031 0.000

28.50 0.000 0.00 0.000 0.0 6.42 6.48 0.031 2901 4.28 0.031 0.000

28.75 0.000 0.00 0.000 0.0 6.35 6.42 0.031 2873 4.27 0.031 0.000

29.00 0.000 0.00 0.000 0.0 6.29 6.35 0.031 2845 4.26 0.031 0.000

29.25 0.000 0.00 0.000 0.0 6.23 6.29 0.031 2818 4.24 0.031 0.000

29.50 0.000 0.00 0.000 0.0 6.17 6.23 0.031 2790 4.23 0.031 0.000

29.75 0.000 0.00 0.000 0.0 6.11 6.17 0.031 2762 4.21 0.031 0.000

30.00 0.000 0.00 0.000 0.0 6.05 6.11 0.031 2735 4.20 0.031 0.000

30.25 0.000 0.00 0.000 0.0 5.99 6.05 0.031 2707 4.18 0.031 0.000

30.50 0.000 0.00 0.000 0.0 5.92 5.99 0.031 2680 4.17 0.031 0.000

30.75 0.000 0.00 0.000 0.0 5.86 5.92 0.030 2652 4.15 0.030 0.000

31.00 0.000 0.00 0.000 0.0 5.80 5.86 0.030 2625 4.14 0.030 0.000

31.25 0.000 0.00 0.000 0.0 5.74 5.80 0.030 2597 4.12 0.030 0.000

31.50 0.000 0.00 0.000 0.0 5.68 5.74 0.030 2570 4.10 0.030 0.000

31.75 0.000 0.00 0.000 0.0 5.62 5.68 0.030 2543 4.09 0.030 0.000

32.00 0.000 0.00 0.000 0.0 5.56 5.62 0.030 2516 4.07 0.030 0.000

32.25 0.000 0.00 0.000 0.0 5.50 5.56 0.030 2488 4.06 0.030 0.000

32.50 0.000 0.00 0.000 0.0 5.44 5.50 0.030 2461 4.04 0.030 0.000

32.75 0.000 0.00 0.000 0.0 5.38 5.44 0.030 2434 4.03 0.030 0.000

33.00 0.000 0.00 0.000 0.0 5.32 5.38 0.030 2407 4.02 0.030 0.000

33.25 0.000 0.00 0.000 0.0 5.26 5.32 0.030 2380 4.00 0.030 0.000

33.50 0.000 0.00 0.000 0.0 5.20 5.26 0.030 2353 3.96 0.030 0.000

33.75 0.000 0.00 0.000 0.0 5.14 5.20 0.030 2327 3.91 0.030 0.000

34.00 0.000 0.00 0.000 0.0 5.08 5.14 0.029 2300 3.86 0.029 0.000

34.25 0.000 0.00 0.000 0.0 5.02 5.08 0.029 2274 3.81 0.029 0.000

34.50 0.000 0.00 0.000 0.0 4.97 5.02 0.029 2248 3.76 0.029 0.000

34.75 0.000 0.00 0.000 0.0 4.91 4.97 0.029 2222 3.72 0.029 0.000

35.00 0.000 0.00 0.000 0.0 4.85 4.91 0.029 2196 3.67 0.029 0.000

35.25 0.000 0.00 0.000 0.0 4.79 4.85 0.028 2170 3.62 0.028 0.000

35.50 0.000 0.00 0.000 0.0 4.74 4.79 0.028 2145 3.57 0.028 0.000

35.75 0.000 0.00 0.000 0.0 4.68 4.74 0.028 2119 3.53 0.028 0.000

36.00 0.000 0.00 0.000 0.0 4.63 4.68 0.028 2094 3.48 0.028 0.000

36.25 0.000 0.00 0.000 0.0 4.57 4.63 0.028 2069 3.44 0.028 0.000

36.50 0.000 0.00 0.000 0.0 4.51 4.57 0.028 2044 3.39 0.028 0.000

36.75 0.000 0.00 0.000 0.0 4.46 4.51 0.027 2019 3.34 0.027 0.000

37.00 0.000 0.00 0.000 0.0 4.41 4.46 0.027 1995 3.30 0.027 0.000

37.25 0.000 0.00 0.000 0.0 4.35 4.41 0.027
MODIFIED PULS-DMA-2B BASIN 2 page # 1
RESULTS: Routing of 24 hr - 2 yr Total Hydrograph in Basin-2 Max outflow: 0.262 cfs initial elev: 0.0 ft
Max elevation in pond: 5.864 ft (from bottom of gravel) Peak flow in: 1.23 cfs Vol-out: 20267 cu-ft Vol in: 25997 cu-ft
Pond Storm: 24 hr - 2 yr
time Inflow, In In+In+1 fn Inf. Vol, F 2S1/At-O1 2S2/At+O2 Outflow, On Volume, S Elevation, h (hr) (cfs) (cfs) (cfs) (ft3) (cfs) (cfs) (cfs) (ft3) (ft-osl)

0.00 0.000 0.00 0.00 0.0 0.00 0.0000 0 0.00

0.25 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

0.50 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

0.75 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

1.00 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

1.25 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

1.50 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

1.75 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

2.00 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

2.25 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

2.50 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

2.75 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

3.00 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

3.25 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

3.50 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

3.75 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

4.00 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

4.25 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

4.50 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

4.75 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

5.00 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

5.25 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

5.50 0.000 0.00 0.000 0.0 0.00 0.00 0.0000 0 0.00

5.75 0.000 0.01 0.000 0.0 0.00 0.00 0.0000 0 0.00

6.00 0.011 0.09 0.000 0.0 0.01 0.01 0.0002 5 0.00

6.25 0.080 0.23 0.000 0.0 0.10 0.10 0.0018 45 0.03

6.50 0.146 0.33 0.000 0.0 0.31 0.33 0.0056 144 0.08

6.75 0.185 0.40 0.000 0.0 0.62 0.65 0.0112 285 0.16

7.00 0.212 0.44 0.000 0.0 0.98 1.02 0.0176 451 0.26

7.25 0.231 0.48 0.000 0.0 1.38 1.43 0.0247 631 0.36

7.50 0.248 0.52 0.000 0.0 1.79 1.86 0.0321 821 0.47

7.75 0.267 0.55 0.000 0.0 2.23 2.31 0.0399 1020 0.59

8.00 0.287 0.60 0.000 0.0 2.69 2.78 0.0481 1230 0.71

8.25 0.310 0.64 0.000 0.0 3.17 3.28 0.0568 1452 0.83

8.50 0.333 0.69 0.000 0.0 3.68 3.81 0.0659 1686 0.97

8.75 0.354 0.73 0.000 0.0 4.22 4.37 0.0720 1933 1.15

9.00 0.375 0.77 0.000 0.0 4.80 4.95 0.0772 2194 1.35

9.25 0.399 0.82 0.000 0.0 5.41 5.57 0.0828 2470 1.56

9.50 0.423 0.87 0.000 0.0 6.05 6.23 0.0887 2763 1.78

9.75 0.448 0.92 0.000 0.0 6.73 6.92 0.0949 3073 2.02

10.00 0.472 0.96 0.000 0.0 7.45 7.65 0.1015 3398 2.27

10.25 0.484 0.97 0.000 0.0 8.19 8.41 0.1083 3734 2.53

10.50 0.486 0.98 0.000 0.0 8.93 9.16 0.1150 4070 2.78

10.75 0.494 1.00 0.000 0.0 9.67 9.91 0.1215 4404 3.04

11.00 0.508 1.03 0.000 0.0 10.42 10.67 0.1266 4744 3.30

11.25 0.520 1.05 0.000 0.0 11.18 11.44 0.1317 5090 3.57 Pond Storm: 24 hr - 2 yr (Cont) Routing of 24 hr - 2 yr Total Hydrograph in Basin-2 page # 2 time Inflow, In In+In+1 fn Inf. Vol, F 2S1/At-O1 2S2/At+O2 Outflow, On Volume, S Elevation, h (hr) (cfs) (cfs) (cfs) (ft3) (cfs) (cfs) (cfs) (ft3) (ft-osl)

11.50 0.529 1.06 0.000 0.0 11.95 12.23 0.1368 5441 3.83

11.75 0.534 1.07 0.000 0.0 12.74 13.02 0.1403 5795 4.03

12.00 0.538 1.09 0.000 0.0 13.53 13.81 0.1415 6151 4.09

12.25 0.552 1.13 0.000 0.0 14.33 14.62 0.1426 6514 4.16

12.50 0.575 1.17 0.000 0.0 15.17 15.46 0.1437 6892 4.22

12.75 0.598 1.22 0.000 0.0 16.05 16.34 0.1449 7290 4.29

13.00 0.623 1.70 0.000 0.0 16.98 17.28 0.1461 7708 4.36

13.25 1.076 2.30 0.000 0.0 18.39 18.68 0.1479 8341 4.47

13.50 1.228 2.07 0.000 0.0 20.35 20.69 0.1714 9234 4.62

13.75 0.837 1.59 0.000 0.0 22.04 22.41 0.1887 10001 4.75

14.00 0.750 1.66 0.000 0.0 23.23 23.62 0.1974 10542 4.83

14.25 0.910 1.81 0.000 0.0 24.48 24.89 0.2052 11108 4.93

14.50 0.904 1.78 0.000 0.0 25.87 26.29 0.2131 11736 5.03

14.75 0.880 1.74 0.000 0.0 27.21 27.65 0.2200 12343 5.13

15.00 0.865 1.68 0.000 0.0 28.50 28.95 0.2263 12928 5.23

15.25 0.818 1.61 0.000 0.0 29.72 30.18 0.2318 13479 5.31

15.50 0.789 1.45 0.000 0.0 30.85 31.33 0.2367 13991 5.40

15.75 0.666 1.30 0.000 0.0 31.83 32.31 0.2408 14430 5.47

16.00 0.634 1.25 0.000 0.0 32.64 33.13 0.2440 14797 5.52

16.25 0.617 1.20 0.000 0.0 33.39 33.89 0.2470 15139 5.57

16.50 0.583 1.13 0.000 0.0 34.10 34.59 0.2497 15455 5.63

16.75 0.549 1.06 0.000 0.0 34.72 35.23 0.2521 15739 5.68

17.00 0.513 0.99 0.000 0.0 35.28 35.78 0.2541 15989 5.71

17.25 0.481 0.93 0.000 0.0 35.76 36.27 0.2559 16206 5.75

17.50 0.452 0.88 0.000 0.0 36.18 36.69 0.2574 16395 5.77

17.75 0.425 0.82 0.000 0.0 36.54 37.05 0.2587 16557 5.80

18.00 0.396 0.76 0.000 0.0 36.84 37.36 0.2598 16693 5.82

18.25 0.367 0.71 0.000 0.0 37.08 37.60 0.2606 16803 5.84

18.50 0.338 0.65 0.000 0.0 37.26 37.78 0.2612 16885 5.85

18.75 0.309 0.58 0.000 0.0 37.39 37.91 0.2617 16941 5.86

19.00 0.276 0.52 0.000 0.0 37.45 37.97 0.2619 16968 5.86

19.25 0.243 0.46 0.000 0.0 37.44 37.96 0.2619 16966 5.86

19.50 0.219 0.41 0.000 0.0 37.38 37.90 0.2616 16939 5.86

19.75 0.196 0.36 0.000 0.0 37.27 37.79 0.2613 16890 5.85

20.00 0.168 0.30 0.000 0.0 37.11 37.64 0.2607 16819 5.84

20.25 0.135 0.25 0.000 0.0 36.90 37.42 0.2600 16721 5.82

20.50 0.116 0.22 0.000 0.0 36.63 37.15 0.2590 16600 5.81

20.75 0.104 0.19 0.000 0.0 36.33 36.85 0.2580 16467 5.79

21.00 0.088 0.17 0.000 0.0 36.01 36.53 0.2568 16321 5.76

21.25 0.078 0.15 0.000 0.0 35.67 36.18 0.2556 16165 5.74

21.50 0.071 0.14 0.000 0.0 35.31 35.81 0.2542 16002 5.72

21.75 0.066 0.13 0.000 0.0 34.94 35.44 0.2529 15836 5.69

22.00 0.063 0.12 0.000 0.0 34.56 35.07 0.2515 15667 5.66

22.25 0.061 0.12 0.000 0.0 34.19 34.69 0.2501 15497 5.64

22.50 0.060 0.11 0.000 0.0 33.81 34.31 0.2486 15327 5.61

22.75 0.053 0.10 0.000 0.0 33.43 33.92 0.2472 15154 5.58

23.00 0.048 0.09 0.000 0.0 33.04 33.53 0.2456 14978 5.55

23.25 0.045 0.09 0.000 0.0 32.64 33.13 0.2441 14800 5.52

23.50 0.043 0.09 0.000 0.0 32.25 32.73 0.2425 14621 5.50

23.75 0.042 0.08 0.000 0.0 31.85 32.33 0.2409 14442 5.47

24.00 0.041 0.07 0.000 0.0 31.46 31.93 0.2393 14263 5.44

24.25 0.032 0.03 0.000 0.0 31.05 31.53 0.2376 14081 5.41 Pond Storm: 24 hr - 2 yr (Cont) Routing of 24 hr - 2 yr Total Hydrograph in Basin-2 page # 3 time Inflow, In In+In+1 fn Inf. Vol, F 2S1/At-O1 2S2/At+O2 Outflow, On Volume, S Elevation, h (hr) (cfs) (cfs) (cfs) (ft3) (cfs) (cfs) (cfs) (ft3) (ft-osl)

24.50 0.019 0.03 0.000 0.0 30.62 31.09 0.2357 13883 5.38

24.75 0.009 0.01 0.000 0.0 30.18 30.64 0.2338 13684 5.34

25.00 0.001 0.00 0.000 0.0 29.72 30.19 0.2318 13480 5.31

25.25 0.000 0.00 0.000 0.0 29.26 29.72 0.2298 13272 5.28

25.50 0.000 0.00 0.000 0.0 28.81 29.26 0.2277 13066 5.25

25.75 0.000 0.00 0.000 0.0 28.36 28.81 0.2256 12862 5.22

26.00 0.000 0.00 0.000 0.0 27.91 28.36 0.2235 12660 5.18

26.25 0.000 0.00 0.000 0.0 27.47 27.91 0.2213 12460 5.15

26.50 0.000 0.00 0.000 0.0 27.03 27.47 0.2192 12262 5.12

26.75 0.000 0.00 0.000 0.0 26.60 27.03 0.2170 12066 5.08

27.00 0.000 0.00 0.000 0.0 26.17 26.60 0.2147 11871 5.05

27.25 0.000 0.00 0.000 0.0 25.74 26.17 0.2124 11679 5.02

27.50 0.000 0.00 0.000 0.0 25.32 25.74 0.2101 11489 4.99

27.75 0.000 0.00 0.000 0.0 24.91 25.32 0.2077 11301 4.96

28.00 0.000 0.00 0.000 0.0 24.50 24.91 0.2053 11115 4.93

28.25 0.000 0.00 0.000 0.0 24.09 24.50 0.2029 10932 4.90

28.50 0.000 0.00 0.000 0.0 23.69 24.09 0.2003 10750 4.87

28.75 0.000 0.00 0.000 0.0 23.29 23.69 0.1978 10571 4.84

29.00 0.000 0.00 0.000 0.0 22.90 23.29 0.1950 10394 4.81

29.25 0.000 0.00 0.000 0.0 22.52 22.90 0.1923 10220 4.78

29.50 0.000 0.00 0.000 0.0 22.14 22.52 0.1895 10048 4.75

29.75 0.000 0.00 0.000 0.0 21.77 22.14 0.1864 9879 4.73

30.00 0.000 0.00 0.000 0.0 21.40 21.77 0.1832 9713 4.70

30.25 0.000 0.00 0.000 0.0 21.04 21.40 0.1800 9549 4.67

30.50 0.000 0.00 0.000 0.0 20.69 21.04 0.1758 9389 4.65

30.75 0.000 0.00 0.000 0.0 20.35 20.69 0.1714 9233 4.62

31.00 0.000 0.00 0.000 0.0 20.01 20.35 0.1671 9081 4.59

31.25 0.000 0.00 0.000 0.0 19.69 20.01 0.1623 8932 4.57

31.50 0.000 0.00 0.000 0.0 19.37 19.69 0.1574 8789 4.54

31.75 0.000 0.00 0.000 0.0 19.07 19.37 0.1526 8649 4.52

32.00 0.000 0.00 0.000 0.0 18.77 19.07 0.1484 8514 4.50

32.25 0.000 0.00 0.000 0.0 18.47 18.77 0.1480 8380 4.48

32.50 0.000 0.00 0.000 0.0 18.18 18.47 0.1476 8247 4.45

32.75 0.000 0.00 0.000 0.0 17.88 18.18 0.1473 8114 4.43

33.00 0.000 0.00 0.000 0.0 17.59 17.88 0.1469 7982 4.41

33.25 0.000 0.00 0.000 0.0 17.30 17.59 0.1465 7850 4.39

33.50 0.000 0.00 0.000 0.0 17.01 17.30 0.1461 7718 4.36

33.75 0.000 0.00 0.000 0.0 16.71 17.01 0.1457 7587 4.34

34.00 0.000 0.00 0.000 0.0 16.42 16.71 0.1454 7456 4.32

34.25 0.000 0.00 0.000 0.0 16.13 16.42 0.1450 7325 4.29

34.50 0.000 0.00 0.000 0.0 15.84 16.13 0.1446 7195 4.27

34.75 0.000 0.00 0.000 0.0 15.56 15.84 0.1442 7065 4.25

35.00 0.000 0.00 0.000 0.0 15.27 15.56 0.1438 6935 4.23

35.25 0.000 0.00 0.000 0.0 14.98 15.27 0.1435 6806 4.21

35.50 0.000 0.00 0.000 0.0 14.70 14.98 0.1431 6677 4.19

35.75 0.000 0.00 0.000 0.0 14.41 14.70 0.1427 6549 4.17

36.00 0.000 0.00 0.000 0.0 14.13 14.41 0.1423 6420 4.14

36.25 0.000 0.00 0.000 0.0 13.84 14.13 0.1419 6292 4.12

36.50 0.000 0.00 0.000 0.0 13.56 13.84 0.1415 6165 4.10

36.75 0.000 0.00 0.000 0.0 13.28 13.56 0.1411 6038 4.07

37.00 0.000 0.00 0.000 0.0 12.99 13.28 0.1407 5911 4.05

37.25 0.000 0.00 0.000 0.0 12.71 12.99 0.1402
MODIFIED PULS-DMA-3A page # 1
RESULTS: Routing of 24 hr - 2 yr Total Hydrograph in BMP-3A Max outflow: 0.186 cfs initial elev: 0.0 ft
Max elevation in pond: 5.259 ft (from bottom of gravel) Peak flow in: 0.98 cfs Vol-out: 10502 cu-ft Vol in: 26040 cu-ft
Pond Storm: 24 hr - 2 yr
time Inflow, In In+In+1 fn Inf. Vol, F 2S1/At-O1 2S2/At+O2 Outflow, On Volume, S Elevation, h (hr) (cfs) (cfs) (cfs) (ft3) (cfs) (cfs) (cfs) (ft3) (ft-osl)

0.00 0.000 0.06 0.00 0.0 0.00 0.000 0 0.00

0.25 0.058 0.14 0.002 0.9 0.05 0.06 0.001 25 0.01

0.50 0.087 0.17 0.030 15.2 0.16 0.17 0.002 74 0.03

0.75 0.087 0.20 0.007 31.8 0.29 0.30 0.004 134 0.05

1.00 0.116 0.20 0.006 37.9 0.47 0.48 0.006 214 0.08

1.25 0.087 0.17 0.008 44.4 0.64 0.66 0.008 293 0.11

1.50 0.087 0.17 0.009 52.1 0.78 0.80 0.009 356 0.13

1.75 0.087 0.20 0.009 60.2 0.91 0.94 0.011 416 0.15

2.00 0.116 0.23 0.009 68.6 1.07 1.10 0.013 488 0.18

2.25 0.116 0.23 0.010 77.0 1.25 1.29 0.015 572 0.21

2.50 0.116 0.26 0.010 85.7 1.43 1.47 0.017 652 0.24

2.75 0.145 0.29 0.010 94.7 1.63 1.67 0.020 744 0.28

3.00 0.145 0.29 0.010 103.8 1.86 1.90 0.022 846 0.31

3.25 0.145 0.29 0.011 113.2 2.08 2.13 0.025 946 0.35

3.50 0.145 0.29 0.011 122.8 2.29 2.34 0.028 1042 0.39

3.75 0.145 0.32 0.011 132.6 2.50 2.56 0.030 1137 0.42

4.00 0.174 0.35 0.011 142.5 2.73 2.79 0.033 1242 0.46

4.25 0.174 0.38 0.011 152.5 2.98 3.05 0.036 1357 0.50

4.50 0.203 0.41 0.011 162.6 3.26 3.33 0.039 1482 0.55

4.75 0.203 0.43 0.012 172.9 3.55 3.64 0.043 1617 0.60

5.00 0.231 0.41 0.012 183.5 3.87 3.96 0.047 1762 0.65

5.25 0.174 0.38 0.012 194.3 4.15 4.25 0.050 1890 0.70

5.50 0.203 0.43 0.012 205.2 4.40 4.50 0.053 2002 0.74

5.75 0.231 0.46 0.012 216.2 4.69 4.81 0.057 2137 0.79

6.00 0.231 0.49 0.012 227.3 5.01 5.13 0.060 2281 0.84

6.25 0.260 0.52 0.013 238.5 5.35 5.48 0.064 2435 0.90

6.50 0.260 0.55 0.013 249.9 5.71 5.84 0.069 2598 0.96

6.75 0.289 0.58 0.013 261.5 6.08 6.23 0.073 2771 1.03

7.00 0.289 0.58 0.013 273.2 6.49 6.64 0.075 2953 1.12

7.25 0.289 0.61 0.014 285.3 6.88 7.04 0.078 3132 1.21

7.50 0.318 0.67 0.014 297.8 7.30 7.46 0.081 3321 1.30

7.75 0.347 0.72 0.014 310.6 7.77 7.94 0.084 3533 1.41

8.00 0.376 0.81 0.015 323.8 8.28 8.46 0.088 3768 1.53

8.25 0.434 0.87 0.015 337.4 8.88 9.06 0.092 4037 1.66

8.50 0.434 0.90 0.016 351.5 9.52 9.72 0.097 4329 1.80

8.75 0.463 0.95 0.017 366.1 10.18 10.39 0.102 4628 1.95

9.00 0.492 1.04 0.017 381.3 10.89 11.11 0.106 4950 2.11

9.25 0.550 1.13 0.018 396.9 11.68 11.90 0.109 5306 2.28

9.50 0.579 1.19 0.018 413.1 12.55 12.77 0.114 5697 2.48

9.75 0.608 1.24 0.019 429.9 13.46 13.70 0.118 6110 2.68

10.00 0.637 1.07 0.020 447.3 14.42 14.66 0.123 6544 2.89

10.25 0.434 0.87 0.020 465.3 15.19 15.45 0.127 6895 3.07

10.50 0.434 1.01 0.021 483.7 15.76 16.02 0.130 7151 3.19

10.75 0.579 1.16 0.021 502.3 16.47 16.73 0.133 7470 3.35

11.00 0.579 1.13 0.021 521.0 17.31 17.58 0.138 7850 3.54

11.25 0.550 1.10 0.021 540.0 18.11 18.39 0.142 8213 3.72 Pond Storm: 24 hr - 2 yr Routing of 24 hr - 2 yr Total Hydrograph in BMP-3A page # 2 time Inflow, In In+In+1 fn Inf. Vol, F 2S1/At-O1 2S2/At+O2 Outflow, On Volume, S Elevation, h (hr) (cfs) (cfs) (cfs) (ft3) (cfs) (cfs) (cfs) (ft3) (ft-osl)

11.50 0.550 1.04 0.021 559.2 18.88 19.17 0.145 8560 3.89

11.75 0.492 1.01 0.022 578.6 19.58 19.88 0.147 8877 4.01

12.00 0.521 1.24 0.022 598.1 20.25 20.55 0.148 9181 4.06

12.25 0.723 1.48 0.021 617.4 21.16 21.45 0.149 9587 4.12

12.50 0.752 1.56 0.021 636.4 22.29 22.59 0.151 10097 4.19

12.75 0.810 1.65 0.021 655.1 23.50 23.81 0.152 10646 4.28

13.00 0.839 1.82 0.020 673.6 24.81 25.11 0.154 11232 4.36

13.25 0.984 1.97 0.020 691.9 26.28 26.59 0.155 11894 4.46

13.50 0.984 1.65 0.020 710.2 27.88 28.20 0.161 12619 4.57

13.75 0.665 1.33 0.020 728.4 29.16 29.49 0.166 13196 4.65

14.00 0.665 1.45 0.020 746.6 30.11 30.45 0.169 13626 4.72

14.25 0.781 1.53 0.020 764.5 31.18 31.52 0.171 14106 4.79

14.50 0.752 1.50 0.020 782.4 32.32 32.67 0.174 14623 4.86

14.75 0.752 1.48 0.020 800.1 33.43 33.79 0.177 15125 4.94

15.00 0.723 1.42 0.019 817.7 34.51 34.87 0.179 15611 5.01

15.25 0.694 1.36 0.019 835.1 35.53 35.89 0.181 16069 5.08

15.50 0.665 1.22 0.019 852.5 36.48 36.85 0.183 16500 5.14

15.75 0.550 1.10 0.019 869.7 37.29 37.66 0.185 16864 5.20

16.00 0.550 0.67 0.019 886.8 37.98 38.35 0.186 17175 5.24

16.25 0.116 0.23 0.019 903.8 38.24 38.61 0.186 17290 5.26

16.50 0.116 0.20 0.018 920.5 38.06 38.43 0.186 17210 5.25

16.75 0.087 0.17 0.018 937.0 37.85 38.22 0.186 17117 5.23

17.00 0.087 0.23 0.018 953.2 37.62 37.99 0.185 17012 5.22

17.25 0.145 0.29 0.018 969.1 37.45 37.82 0.185 16934 5.21

17.50 0.145 0.29 0.017 984.8 37.33 37.70 0.185 16882 5.20

17.75 0.145 0.26 0.017 1000.1 37.22 37.59 0.184 16831 5.19

18.00 0.116 0.23 0.017 1015.3 37.08 37.44 0.184 16767 5.18

18.25 0.116 0.23 0.016 1030.2 36.91 37.27 0.184 16691 5.17

18.50 0.116 0.20 0.016 1044.9 36.74 37.11 0.184 16615 5.16

18.75 0.087 0.14 0.016 1059.4 36.54 36.91 0.183 16527 5.15

19.00 0.058 0.14 0.016 1073.7 36.29 36.66 0.183 16413 5.13

19.25 0.087 0.20 0.016 1087.8 36.04 36.40 0.182 16300 5.11

19.50 0.116 0.20 0.015 1101.7 35.85 36.21 0.182 16213 5.10

19.75 0.087 0.14 0.015 1115.4 35.66 36.02 0.181 16127 5.09

20.00 0.058 0.14 0.015 1129.0 35.41 35.77 0.181 16016 5.07

20.25 0.087 0.17 0.015 1142.3 35.16 35.53 0.180 15905 5.05

20.50 0.087 0.17 0.015 1155.5 34.95 35.31 0.180 15808 5.04

20.75 0.087 0.14 0.014 1168.5 34.73 35.09 0.179 15711 5.03

21.00 0.058 0.14 0.014 1181.4 34.49 34.85 0.179 15602 5.01

21.25 0.087 0.14 0.014 1194.1 34.25 34.61 0.178 15494 4.99

21.50 0.058 0.14 0.014 1206.7 34.01 34.37 0.178 15386 4.98

21.75 0.087 0.14 0.014 1219.1 33.78 34.13 0.177 15279 4.96

22.00 0.058 0.14 0.014 1231.3 33.54 33.89 0.177 15172 4.95

22.25 0.087 0.14 0.013 1243.5 33.30 33.66 0.176 15066 4.93

22.50 0.058 0.12 0.013 1255.5 33.07 33.42 0.176 14961 4.91

22.75 0.058 0.12 0.013 1267.3 32.81 33.16 0.175 14843 4.90

23.00 0.058 0.12 0.013 1279.1 32.55 32.90 0.175 14726 4.88

23.25 0.058 0.12 0.013 1290.7 32.29 32.64 0.174 14609 4.86

23.50 0.058 0.12 0.013 1302.2 32.03 32.38 0.173 14494 4.84

23.75 0.058 0.12 0.013 1313.6 31.78 32.13 0.173 14379 4.83

24.00 0.058 0.06 0.012 1324.8 31.53 31.87 0.172 14264 4.81

24.25 0.000 0.00 0.012 1336.0 31.56 31.56
MODIFIED PULS-DMA-3B page # 1
RESULTS: Routing of 24 hr - 2 yr Total Hydrograph in BMP-3B Max outflow: 0.060 cfs initial elev: 0.0 ft
Max elevation in pond: 3.173 ft (from bottom of gravel) Peak flow in: 0.63 cfs Vol-out: 3216 cu-ft Vol in: 16741 cu-ft
Pond Storm: 24 hr - 2 yr
time Inflow, In In+In+1 fn Inf. Vol, F 2S1/At-O1 2S2/At+O2 Outflow, On Volume, S Elevation, h (hr) (cfs) (cfs) (cfs) (ft3) (cfs) (cfs) (cfs) (ft3) (ft-osl)

0.00 0.000 0.04 0.00 0.0 0.00 0.000 0 0.00

0.25 0.037 0.09 0.006 2.5 0.03 0.03 0.000 14 0.00

0.50 0.056 0.11 0.019 13.5 0.10 0.10 0.000 45 0.01

0.75 0.056 0.13 0.013 28.0 0.18 0.18 0.001 80 0.02

1.00 0.074 0.13 0.012 39.5 0.28 0.28 0.001 126 0.03

1.25 0.056 0.11 0.013 50.9 0.38 0.39 0.001 173 0.04

1.50 0.056 0.11 0.013 62.8 0.46 0.47 0.002 210 0.05

1.75 0.056 0.13 0.013 74.9 0.55 0.55 0.002 246 0.06

2.00 0.074 0.15 0.013 86.9 0.64 0.65 0.002 291 0.07

2.25 0.074 0.15 0.013 98.8 0.76 0.77 0.003 344 0.08

2.50 0.074 0.17 0.014 111.0 0.88 0.88 0.003 396 0.09

2.75 0.093 0.19 0.014 123.4 1.01 1.02 0.004 456 0.11

3.00 0.093 0.19 0.014 136.1 1.16 1.17 0.004 523 0.12

3.25 0.093 0.19 0.015 149.0 1.31 1.32 0.005 590 0.14

3.50 0.093 0.19 0.015 162.2 1.45 1.46 0.005 656 0.16

3.75 0.093 0.20 0.015 175.6 1.60 1.61 0.006 722 0.17

4.00 0.112 0.22 0.015 189.2 1.76 1.77 0.006 795 0.19

4.25 0.112 0.24 0.015 203.0 1.94 1.95 0.007 876 0.21

4.50 0.130 0.26 0.016 216.9 2.14 2.15 0.008 964 0.23

4.75 0.130 0.28 0.016 231.2 2.35 2.36 0.008 1060 0.25

5.00 0.149 0.26 0.016 245.7 2.58 2.59 0.009 1163 0.27

5.25 0.112 0.24 0.017 260.5 2.78 2.80 0.010 1257 0.30

5.50 0.130 0.28 0.017 275.5 2.97 2.99 0.010 1342 0.32

5.75 0.149 0.30 0.017 290.7 3.19 3.22 0.011 1443 0.34

6.00 0.149 0.32 0.017 306.1 3.43 3.46 0.012 1551 0.37

6.25 0.167 0.33 0.017 321.7 3.69 3.72 0.013 1666 0.39

6.50 0.167 0.35 0.018 337.4 3.96 3.99 0.014 1789 0.42

6.75 0.186 0.37 0.018 353.5 4.25 4.28 0.015 1919 0.45

7.00 0.186 0.37 0.018 369.8 4.55 4.59 0.016 2056 0.49

7.25 0.186 0.39 0.019 386.3 4.85 4.89 0.017 2192 0.52

7.50 0.205 0.43 0.019 403.2 5.17 5.21 0.018 2335 0.55

7.75 0.223 0.47 0.019 420.2 5.52 5.56 0.019 2494 0.59

8.00 0.242 0.52 0.019 437.6 5.91 5.95 0.021 2667 0.63

8.25 0.279 0.56 0.020 455.3 6.34 6.39 0.022 2865 0.68

8.50 0.279 0.58 0.020 473.3 6.81 6.86 0.024 3077 0.73

8.75 0.298 0.61 0.021 491.8 7.30 7.35 0.026 3296 0.78

9.00 0.316 0.67 0.021 510.7 7.81 7.87 0.027 3529 0.83

9.25 0.353 0.73 0.022 530.0 8.38 8.44 0.029 3785 0.89

9.50 0.372 0.76 0.022 549.8 9.00 9.06 0.032 4065 0.96

9.75 0.391 0.80 0.023 570.1 9.65 9.72 0.034 4358 1.04

10.00 0.409 0.69 0.024 591.0 10.33 10.40 0.035 4666 1.14

10.25 0.279 0.56 0.025 612.7 10.90 10.97 0.036 4922 1.22

10.50 0.279 0.65 0.025 635.2 11.34 11.41 0.037 5118 1.28

10.75 0.372 0.74 0.026 658.0 11.86 11.94 0.038 5355 1.35

11.00 0.372 0.73 0.026 681.2 12.48 12.55 0.039 5631 1.44

11.25 0.353 0.71 0.027 704.8 13.07 13.15 0.040 5898 1.52 Pond Storm: 24 hr - 2 yr (Cont) Routing of 24 hr - 2 yr Total Hydrograph in BMP-3B page # 2 time Inflow, In In+In+1 fn Inf. Vol, F 2S1/At-O1 2S2/At+O2 Outflow, On Volume, S Elevation, h (hr) (cfs) (cfs) (cfs) (ft3) (cfs) (cfs) (cfs) (ft3) (ft-osl)

11.50 0.353 0.67 0.027 728.8 13.64 13.72 0.042 6156 1.61

11.75 0.316 0.65 0.027 753.3 14.17 14.25 0.043 6394 1.68

12.00 0.335 0.80 0.028 778.1 14.68 14.76 0.044 6624 1.75

12.25 0.465 0.95 0.028 803.1 15.33 15.42 0.045 6919 1.85

12.50 0.484 1.00 0.028 828.4 16.13 16.22 0.047 7279 1.96

12.75 0.521 1.06 0.029 854.2 16.98 17.08 0.048 7663 2.08

13.00 0.539 1.17 0.030 880.6 17.88 17.98 0.050 8070 2.21

13.25 0.632 1.26 0.030 907.7 18.89 18.99 0.051 8525 2.35

13.50 0.632 1.06 0.031 935.4 19.99 20.10 0.053 9019 2.51

13.75 0.428 0.86 0.032 963.9 20.88 20.99 0.054 9420 2.63

14.00 0.428 0.93 0.033 993.1 21.56 21.67 0.055 9726 2.73

14.25 0.502 0.99 0.033 1022.5 22.31 22.42 0.056 10065 2.84

14.50 0.484 0.97 0.033 1052.2 23.12 23.23 0.058 10428 2.95

14.75 0.484 0.95 0.033 1082.0 23.90 24.02 0.058 10781 3.02

15.00 0.465 0.91 0.033 1112.0 24.66 24.78 0.059 11125 3.05

15.25 0.446 0.87 0.033 1141.7 25.39 25.51 0.059 11453 3.08

15.50 0.428 0.78 0.032 1170.9 26.08 26.20 0.059 11764 3.11

15.75 0.353 0.71 0.032 1199.8 26.68 26.80 0.059 12033 3.14

16.00 0.353 0.43 0.031 1228.3 27.21 27.32 0.060 12269 3.16

16.25 0.074 0.15 0.031 1256.5 27.45 27.57 0.060 12380 3.17

16.50 0.074 0.13 0.031 1284.2 27.42 27.54 0.060 12366 3.17

16.75 0.056 0.11 0.030 1311.5 27.37 27.49 0.060 12343 3.17

17.00 0.056 0.15 0.030 1338.3 27.30 27.42 0.060 12313 3.17

17.25 0.093 0.19 0.029 1364.7 27.27 27.39 0.060 12300 3.17

17.50 0.093 0.19 0.029 1390.6 27.28 27.40 0.060 12304 3.17

17.75 0.093 0.17 0.028 1416.1 27.29 27.41 0.060 12308 3.17

18.00 0.074 0.15 0.028 1441.2 27.28 27.40 0.060 12305 3.17

18.25 0.074 0.15 0.027 1466.0 27.26 27.38 0.060 12294 3.16

18.50 0.074 0.13 0.027 1490.4 27.23 27.35 0.060 12282 3.16

18.75 0.056 0.09 0.027 1514.5 27.19 27.31 0.060 12263 3.16

19.00 0.037 0.09 0.026 1538.3 27.11 27.23 0.060 12228 3.16

19.25 0.056 0.13 0.026 1561.7 27.03 27.15 0.060 12192 3.15

19.50 0.074 0.13 0.026 1584.9 26.99 27.11 0.060 12174 3.15

19.75 0.056 0.09 0.025 1607.8 26.95 27.07 0.060 12156 3.15

20.00 0.037 0.09 0.025 1630.4 26.88 27.00 0.059 12122 3.15

20.25 0.056 0.11 0.025 1652.7 26.80 26.92 0.059 12088 3.14

20.50 0.056 0.11 0.024 1674.8 26.75 26.87 0.059 12063 3.14

20.75 0.056 0.09 0.024 1696.7 26.69 26.81 0.059 12038 3.14

21.00 0.037 0.09 0.024 1718.3 26.62 26.74 0.059 12004 3.13

21.25 0.056 0.09 0.024 1739.7 26.54 26.66 0.059 11972 3.13

21.50 0.037 0.09 0.023 1760.8 26.47 26.59 0.059 11939 3.13

21.75 0.056 0.09 0.023 1781.8 26.40 26.52 0.059 11906 3.12

22.00 0.037 0.09 0.023 1802.5 26.33 26.45 0.059 11874 3.12

22.25 0.056 0.09 0.023 1823.1 26.26 26.37 0.059 11842 3.12

22.50 0.037 0.07 0.023 1843.4 26.19 26.30 0.059 11810 3.12

22.75 0.037 0.07 0.022 1863.6 26.10 26.22 0.059 11770 3.11

23.00 0.037 0.07 0.022 1883.6 26.01 26.13 0.059 11731 3.11

23.25 0.037 0.07 0.022 1903.4 25.92 26.04 0.059 11691 3.10

23.50 0.037 0.07 0.022 1923.0 25.83 25.95 0.059 11652 3.10

23.75 0.037 0.07 0.022 1942.4 25.75 25.87 0.059 11613 3.09

24.00 0.037 0.04 0.021 1961.7 25.66 25.78 0.059 11574 3.09

24.25 0.000 0.00 0.021 1980.9 25.66 25.66
MODIFIED PULS-DMA-4 page # 1
RESULTS: Routing of 24 hr - 2 yr Total Hydrograph in BMP-4 Max outflow: 0.419 cfs initial elev: 0.0 ft
Max elevation in pond: 5.889 ft (from bottom of gravel) Peak flow in: 2.86 cfs Vol-out: 23083 cu-ft Vol in: 75619 cu-ft
Pond Storm: 24 hr - 2 yr
time Inflow, In In+In+1 fn Inf. Vol, F 2S1/At-O1 2S2/At+O2 Outflow, On Volume, S Elevation, h (hr) (cfs) (cfs) (cfs) (ft3) (cfs) (cfs) (cfs) (ft3) (ft-osl)

0.00 0.000 0.17 0.00 0.0 0.00 0.000 0 0.00

0.25 0.168 0.42 0.023 10.4 0.14 0.14 0.001 65 0.01

0.50 0.252 0.50 0.102 66.9 0.43 0.44 0.004 195 0.03

0.75 0.252 0.59 0.060 140.2 0.76 0.77 0.007 343 0.06

1.00 0.336 0.59 0.054 191.8 1.21 1.23 0.012 548 0.09

1.25 0.252 0.50 0.060 243.2 1.65 1.68 0.016 748 0.12

1.50 0.252 0.50 0.063 298.2 1.99 2.03 0.019 904 0.15

1.75 0.252 0.59 0.062 354.2 2.33 2.37 0.023 1056 0.18

2.00 0.336 0.67 0.061 409.6 2.74 2.79 0.027 1244 0.21

2.25 0.336 0.67 0.062 465.1 3.22 3.29 0.031 1465 0.24

2.50 0.336 0.76 0.063 521.5 3.70 3.77 0.036 1680 0.28

2.75 0.420 0.84 0.064 579.0 4.24 4.33 0.041 1929 0.32

3.00 0.420 0.84 0.066 637.6 4.86 4.95 0.047 2208 0.37

3.25 0.420 0.84 0.067 697.5 5.46 5.57 0.053 2482 0.41

3.50 0.420 0.84 0.069 758.8 6.05 6.17 0.059 2748 0.46

3.75 0.420 0.92 0.069 820.9 6.62 6.75 0.064 3009 0.50

4.00 0.504 1.01 0.070 883.7 7.27 7.41 0.070 3302 0.55

4.25 0.504 1.09 0.071 947.1 7.98 8.13 0.077 3625 0.60

4.50 0.588 1.18 0.072 1011.5 8.76 8.93 0.085 3980 0.66

4.75 0.588 1.26 0.073 1077.0 9.60 9.79 0.093 4363 0.72

5.00 0.672 1.18 0.075 1143.8 10.51 10.72 0.102 4776 0.79

5.25 0.504 1.09 0.077 1212.0 11.32 11.54 0.110 5142 0.85

5.50 0.588 1.26 0.077 1281.3 12.02 12.26 0.116 5462 0.91

5.75 0.672 1.34 0.078 1351.1 12.88 13.13 0.125 5851 0.97

6.00 0.672 1.43 0.079 1421.4 13.80 14.07 0.132 6270 1.05

6.25 0.756 1.51 0.080 1492.8 14.80 15.07 0.137 6721 1.15

6.50 0.756 1.60 0.083 1566.2 15.86 16.15 0.144 7201 1.26

6.75 0.840 1.68 0.085 1641.7 16.99 17.29 0.150 7712 1.37

7.00 0.840 1.68 0.088 1719.4 18.18 18.50 0.157 8252 1.49

7.25 0.840 1.76 0.090 1799.3 19.36 19.68 0.164 8784 1.61

7.50 0.924 1.93 0.092 1881.3 20.60 20.94 0.171 9345 1.73

7.75 1.008 2.10 0.094 1965.1 21.98 22.34 0.179 9974 1.87

8.00 1.092 2.35 0.097 2051.0 23.52 23.89 0.188 10668 2.02

8.25 1.260 2.52 0.099 2139.1 25.29 25.68 0.195 11466 2.20

8.50 1.260 2.60 0.103 2230.0 27.20 27.60 0.203 12331 2.39

8.75 1.344 2.77 0.106 2323.8 29.17 29.60 0.211 13223 2.59

9.00 1.428 3.02 0.109 2420.5 31.29 31.73 0.219 14180 2.80

9.25 1.596 3.28 0.112 2520.2 33.64 34.10 0.229 15240 3.03

9.50 1.680 3.44 0.116 2623.0 36.21 36.69 0.240 16401 3.29

9.75 1.764 3.61 0.120 2729.3 38.91 39.42 0.251 17624 3.56

10.00 1.848 3.11 0.124 2839.0 41.76 42.28 0.262 18910 3.85

10.25 1.260 2.52 0.128 2952.2 44.08 44.62 0.268 19957 4.02

10.50 1.260 2.94 0.128 3067.3 45.81 46.35 0.270 20734 4.07

10.75 1.680 3.36 0.126 3181.6 47.95 48.49 0.272 21700 4.14

11.00 1.680 3.28 0.124 3293.7 50.51 51.06 0.274 22854 4.21

11.25 1.596 3.19 0.122 3404.1 52.99 53.54 0.277 23971 4.28 Pond Storm: 24 hr - 2 yr (Cont) Routing of 24 hr - 2 yr Total Hydrograph in BMP-4 page # 2 time Inflow, In In+In+1 fn Inf. Vol, F 2S1/At-O1 2S2/At+O2 Outflow, On Volume, S Elevation, h (hr) (cfs) (cfs) (cfs) (ft3) (cfs) (cfs) (cfs) (ft3) (ft-osl)

11.50 1.596 3.02 0.120 3513.0 55.38 55.94 0.279 25048 4.35

11.75 1.428 2.94 0.119 3620.5 57.61 58.17 0.281 26050 4.42

12.00 1.512 3.61 0.117 3726.7 59.75 60.31 0.283 27014 4.47

12.25 2.101 4.29 0.116 3831.6 62.55 63.13 0.290 28276 4.55

12.50 2.185 4.54 0.115 3935.4 65.98 66.60 0.310 29831 4.65

12.75 2.353 4.79 0.114 4038.5 69.64 70.29 0.326 31484 4.75

13.00 2.437 5.29 0.114 4141.2 73.52 74.20 0.338 33237 4.85

13.25 2.857 5.71 0.114 4243.5 77.89 78.59 0.350 35207 4.97

13.50 2.857 4.79 0.114 4345.7 82.65 83.37 0.361 37356 5.09

13.75 1.932 3.86 0.114 4448.0 86.47 87.21 0.370 39080 5.20

14.00 1.932 4.20 0.113 4550.1 89.36 90.11 0.376 40381 5.27

14.25 2.269 4.45 0.113 4651.8 92.57 93.34 0.382 41829 5.35

14.50 2.185 4.37 0.112 4752.8 96.02 96.80 0.389 43385 5.44

14.75 2.185 4.29 0.112 4853.3 99.38 100.17 0.395 44898 5.52

15.00 2.101 4.12 0.111 4953.5 102.64 103.44 0.401 46368 5.61

15.25 2.016 3.95 0.110 5053.2 105.72 106.53 0.406 47758 5.69

15.50 1.932 3.53 0.110 5152.4 108.63 109.45 0.410 49069 5.75

15.75 1.596 3.19 0.109 5251.1 111.11 111.94 0.414 50187 5.81

16.00 1.596 1.93 0.109 5349.1 113.25 114.09 0.418 51151 5.87

16.25 0.336 0.67 0.108 5446.5 114.13 114.97 0.419 51546 5.89

16.50 0.336 0.59 0.107 5543.0 113.75 114.59 0.419 51376 5.88

16.75 0.252 0.50 0.105 5638.2 113.29 114.13 0.418 51169 5.87

17.00 0.252 0.67 0.103 5732.0 112.75 113.59 0.417 50926 5.85

17.25 0.420 0.84 0.102 5824.4 112.39 113.22 0.416 50761 5.84

17.50 0.420 0.84 0.101 5915.6 112.19 113.02 0.416 50673 5.84

17.75 0.420 0.76 0.099 6005.5 112.00 112.83 0.416 50587 5.83

18.00 0.336 0.67 0.098 6094.4 111.73 112.56 0.415 50464 5.83

18.25 0.336 0.67 0.097 6182.1 111.38 112.20 0.415 50306 5.82

18.50 0.336 0.59 0.096 6268.9 111.03 111.85 0.414 50148 5.81

18.75 0.252 0.42 0.095 6354.6 110.60 111.42 0.414 49955 5.80

19.00 0.168 0.42 0.094 6439.3 110.00 110.83 0.413 49687 5.79

19.25 0.252 0.59 0.093 6523.0 109.41 110.24 0.412 49421 5.77

19.50 0.336 0.59 0.091 6605.8 109.00 109.82 0.411 49233 5.76

19.75 0.252 0.42 0.090 6687.7 108.58 109.40 0.410 49046 5.75

20.00 0.168 0.42 0.090 6768.7 108.00 108.82 0.409 48785 5.74

20.25 0.252 0.50 0.089 6848.9 107.43 108.24 0.409 48526 5.73

20.50 0.252 0.50 0.088 6928.2 106.94 107.75 0.408 48306 5.71

20.75 0.252 0.42 0.087 7006.7 106.46 107.27 0.407 48088 5.70

21.00 0.168 0.42 0.086 7084.4 105.89 106.70 0.406 47833 5.69

21.25 0.252 0.42 0.085 7161.4 105.33 106.14 0.405 47581 5.68

21.50 0.168 0.42 0.084 7237.7 104.77 105.58 0.404 47329 5.66

21.75 0.252 0.42 0.084 7313.2 104.22 105.02 0.403 47079 5.65

22.00 0.168 0.42 0.083 7388.1 103.67 104.47 0.402 46831 5.63

22.25 0.252 0.42 0.082 7462.2 103.12 103.92 0.401 46584 5.62

22.50 0.168 0.34 0.081 7535.6 102.58 103.38 0.400 46339 5.60

22.75 0.168 0.34 0.081 7608.5 101.95 102.75 0.399 46058 5.59

23.00 0.168 0.34 0.080 7680.6 101.33 102.13 0.398 45778 5.57

23.25 0.168 0.34 0.079 7752.1 100.71 101.51 0.397 45500 5.56

23.50 0.168 0.34 0.078 7823.1 100.10 100.89 0.396 45223 5.54

23.75 0.168 0.34 0.078 7893.4 99.49 100.28 0.395 44948 5.53

24.00 0.168 0.17 0.077 7963.2 98.88 99.67 0.394 44674 5.51

24.25 0.000 0.00 0.077 8032.3 98.90 98.90

- 43 -

Appendix 8: Source Control
Pollutant Sources/Source Control Checklist

STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST

How to use this worksheet (also see instructions in Section G of the WQMP Template):

1. Review Column 1 and identify which of these potential sources of stormwater pollutants apply to your site. Check each box that applies.

2. Review Column 2 and incorporate all of the corresponding applicable BMPs in your WQMP Exhibit.

3. Review Columns 3 and 4 and incorporate all of the corresponding applicable permanent controls and operational BMPs in your WQMP. Use the format shown in Table G.1on page 23 of this WQMP Template. Describe your specific BMPs in an accompanying narrative, and explain any special conditions or situations that required omitting BMPs or substituting alternative BMPs for those shown here.




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-44, “Drainage System
Maintenance,” in the CASQA
Stormwater Quality Handbooks at
www.cabmphandbooks.com
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.”
 B. Interior floor drains
and elevator shaft sump
pumps
 State that interior floor drains and
elevator shaft sump pumps will be
plumbed to sanitary sewer.
 Inspect and maintain drains to prevent
blockages and overflow.
 C. Interior parking
garages
 State that parking garage floor
drains will be plumbed to the
sanitary sewer.
 Inspect and maintain drains to prevent
blockages and overflow.

STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST




Show locations of native trees or
areas of shrubs and ground cover to
be undisturbed and retained.

Show self-retaining landscape
areas, if any.

Show stormwater treatment and
hydrograph modification
management BMPs. (See
instructions in Chapter 3, Step 5
and guidance in Chapter 5.)



State that final landscape plans will
accomplish all of the following.

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

Design landscaping to 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.

Consider using pest-resistant
plants, especially adjacent to
hardscape.

To insure 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
“What you should know
for…..Landscape and Gardening” at
http://rcflood.org/stormwater/
Error!
Hyperlink reference not valid.

Provide IPM information to new
owners, lessees and operators.

STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST


For restaurants, grocery stores, and
other food service operations, show
location (indoors or in a covered
area outdoors) of a floor sink or
other area for cleaning floor mats,
containers, and equipment.

On the drawing, show a note that
this drain will be connected to a
grease interceptor before
discharging to the sanitary sewer.



Describe the location and features
of the designated cleaning area.

Describe the items to be cleaned in
this facility and how it has been
sized to insure that the largest
items can be accommodated.

 See the brochure, “The Food Service
Industry Best Management Practices for:

Restaurants, Grocery Stores,
Delicatessens and Bakeries” at
http://rcflood.org/stormwater/
Provide this brochure to new site
owners, lessees, and operators.
 G. Refuse areas 




Show where site refuse and
recycled materials will be handled
and stored for pickup. See local
municipal requirements for sizes
and other details of refuse areas.

If dumpsters or other receptacles
are outdoors, show how the
designated area will be covered,
graded, and paved to prevent run-
on and show locations of berms to
prevent runoff from the area.

Any drains from dumpsters,
compactors, and tallow bin areas
shall be connected to a grease
removal device before discharge to
sanitary sewer.



State how site refuse will be
handled and provide supporting
detail to what is shown on plans.

State that signs will be posted on or
near dumpsters with the words “Do
not dump hazardous materials
here” or similar.
 State how the following will be
implemented:

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. See Fact
Sheet SC-34, “Waste Handling and
Disposal” in the CASQA Stormwater
Quality Handbooks at
www.cabmphandbooks.com

STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST

No processes to drain to exterior or
to storm drain system.”
 See Fact Sheet SC-10, “Non-
Stormwater Discharges” in the
CASQA Stormwater Quality
Handbooks at
www.cabmphandbooks.com
See the brochure “Industrial &
Commercial Facilities Best Management
Practices for: Industrial, Commercial
Facilities” at
http://rcflood.org/stormwater/

STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST



Show any outdoor storage areas,
including how materials will be
covered. Show how areas will be
graded and bermed to prevent run-
on or run-off from area.

Storage of non-hazardous liquids
shall be covered by a roof and/or
drain to the sanitary sewer system,
and be contained by berms, dikes,
liners, or vaults.

Storage of hazardous materials and
wastes must be in compliance with
the local hazardous materials
ordinance and a Hazardous
Materials Management Plan for the
site.

Include a detailed description of
materials to be stored, storage
areas, and structural features to
prevent pollutants from entering
storm drains.

Where appropriate, reference
documentation of compliance with
the requirements of Hazardous
Materials Programs for:
 Hazardous Waste Generation
 Hazardous Materials Release
Response and Inventory
 California Accidental Release
(CalARP)
 Aboveground Storage Tank
 Uniform Fire Code Article 80
Section 103(b) & (c) 1991
 Underground Storage Tank
www.cchealth.org/groups/hazmat
/

 See the Fact Sheets SC-31, “Outdoor
Liquid Container Storage” and SC-33,
“Outdoor Storage of Raw Materials ”
in the CASQA Stormwater Quality
Handbooks at
www.cabmphandbooks.com

STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST

IF THESE SOURCES WILL BE
ON THE PROJECT SITE … … THEN YOUR WQMP SHOULD INCLUDE THESE SOURCE CONTROL BMPs, AS APPLICABLE 1 Potential Sources of
Runoff Pollutants
2 Permanent Controls—Show on
WQMP Drawings
3 Permanent Controls—List in WQMP
Table and Narrative
4 Operational BMPs—Include in WQMP
Table and Narrative
 J. Vehicle and
Equipment Cleaning
 Show on drawings as appropriate:
(1) Commercial/industrial facilities
having vehicle/equipment cleaning
needs shall either provide a
covered, bermed area for washing
activities or discourage
vehicle/equipment washing by
removing hose bibs and installing
signs prohibiting such uses.
(2) Multi-dwelling complexes shall
have a paved, bermed, and covered
car wash area (unless car washing
is prohibited on-site and hoses are
provided with an automatic shut-
off to discourage such use).
(3) Washing areas for cars, vehicles,
and equipment shall be paved,
designed to prevent run-on to or
runoff from the area, and plumbed
to drain to the sanitary sewer.
(4) Commercial car wash facilities
shall be designed such that no
runoff from the facility is
discharged to the storm drain
system. Wastewater from the
facility shall discharge to the
sanitary sewer, or a wastewater
reclamation system shall be
installed.
 If a car wash area is not provided,
describe any measures taken to
discourage on-site car washing and
explain how these will be enforced.



Describe operational measures to
implement the following (if
applicable):

Washwater from vehicle and
equipment washing operations shall
not be discharged to the storm drain
system. Refer to “Outdoor Cleaning
Activities and Professional Mobile Service
Providers” for many of the Potential
Sources of Runoff Pollutants categories
below. Brochure can be found at
http://rcflood.org/stormwater/
Car dealerships and similar may
rinse cars with water only.

STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST



Accommodate all vehicle
equipment repair and maintenance
indoors. Or designate an outdoor
work area and design the area to
prevent run-on and runoff of
stormwater.

Show secondary containment for
exterior work areas where motor
oil, brake fluid, gasoline, diesel
fuel, radiator fluid, acid-containing
batteries or other hazardous
materials or hazardous wastes are
used or stored. Drains shall not be
installed within the secondary
containment areas.

Add a note on the plans that states
either (1) there are no floor drains,
or (2) floor drains are connected to
wastewater pretreatment systems
prior to discharge to the sanitary
sewer and an industrial waste
discharge permit will be obtained.





State that no vehicle repair or
maintenance will be done outdoors,
or else describe the required
features of the outdoor work area.

State that there are no floor drains
or if there are floor drains, note the
agency from which an industrial
waste discharge permit will be
obtained and that the design meets
that agency’s requirements.

State that there are no tanks,
containers or sinks to be used for
parts cleaning or rinsing or, if there
are, note the agency from which an
industrial waste discharge permit
will be obtained and that the
design meets that agency’s
requirements.




In the Stormwater Control Plan, note
that all of the following restrictions
apply to use the site:

No person shall dispose of, nor permit
the disposal, directly or indir
ectly of
vehicle fluids, hazardous materials, or
rinsewater from parts cleaning into
storm drains.

No vehicle fluid removal shall be
performed outside a building, nor on
asphalt or ground surfaces, whether
inside or outside a building, except in
such a manner as to ensure that any
spilled fluid will be in an area of
secondary containment. Leaking
vehicle fluids shall be contained or
drained from the vehicle immediately.

No person shall leave unattended drip
parts or other open containers
containing vehicle fluid, unless such
containers are in use or in an area of
secondary containment.

Refer to “Automotive Maintenance & Car
Care Best Management Practices for Auto
Body Shops, Auto Repair Shops, Car
Dealerships, Gas Stations and Fleet
Service Operations”. Brochure can be
found at http://rcflood.org/stormwater/
Refer to Outdoor Cleaning Activities and
Professional Mobile Service Providers for
many of the Potential Sources of
Runoff Pollutants categories below.

Brochure can be found at
http://rcflood.org/stormwater/

STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST


Fueling areas6 shall have
impermeable floors (i.e., portland
cement concrete or equivalent
smooth impervious surface) that
are: a) graded at the minimum
slope necessary to prevent ponding;
and b) separated from the rest of
the site by a grade break that
prevents run-on of stormwater to
the maximum extent practicable.

Fueling areas shall be covered by a
canopy that extends a minimum of
ten feet in each direction from each
pump. [Alternative: The fueling
area must be covered and the
cover’s minimum dimensions must
be equal to or greater than the area
within the grade break or fuel
dispensing area

1.] The canopy [or
cover] shall not drain onto the
fueling area.



The property owner shall dry sweep
the fueling area routinely.

See the Fact Sheet SD-30 , “Fueling
Areas” in the CASQA Stormwater
Quality Handbooks at
www.cabmphandbooks.com

6 The fueling area shall be defined as the area extending a minimum of 6.5 feet from the corner of each fuel dispenser or the length at which the hose and nozzle assembly may be operated plus a minimum of one foot, whichever is greater.

STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST




Show a preliminary design for the
loading dock area, including
roofing and drainage. Loading
docks shall be covered and/or
graded to minimize run-on to and
runoff from the loading area. Roof
downspouts shall be positioned to
direct stormwater away from the
loading area. Water from loading
dock areas shall be drained to the
sanitary sewer, or diverted and
collected for ultimate discharge to
the sanitary sewer.

Loading dock areas draining
directly to the sanitary sewer shall
be equipped with a spill control
valve or equivalent device, which
shall be kept closed during periods
of operation.

Provide a roof overhang over the
loading area or install door skirts
(cowling) at each bay that enclose
the end of the trailer.



Move loaded and unloaded items
indoors as soon as possible.

See Fact Sheet SC-30, “Outdoor
Loading and Unloading,” in the
CASQA Stormwater Quality
Handbooks at
www.cabmphandbooks.com

STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST








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
system.

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.

Avoid roofing, gutters, and trim
made of copper or other
unprotected metals that may leach
into runoff.

Include controls for other sources
as specified by local reviewer.

STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST

- 44 -

Appendix 9: O&M
Operation and Maintenance Plan and Documentation of Finance, Maintenance and Recording Mechanisms

TO BE PROVIDED IN FINAL ENGINEERING

- 6 -

Appendix 10: Educational Materials
BMP Fact Sheets, Maintenance Guidelines and Other End-User BMP Information Riverside County has two drainage systems - sanitary sewers and storm drains.

The storm drain system is designed to help prevent flooding by carrying excess rainwater away from streets. Since the storm drain system does not provide for water treatment, it also serves the
function of transporting
pollutants directly to our waterways .

In recent years, awareness of the need
to protect water quality has increased.

As a result, federal, state, and local
programs have been established to
reduce polluted stormwater discharges to
our waterways. The emphasis of these
programs is to prevent stormwater
pollution since it’s much easier, and less
costly, than cleaning up “after the fact.”
unintended
Unlike sanitary sewers, storm
drains are not connected to a
treatment plant - they flow directly
to our local streams, rivers and
lakes.

DID YOU KNOW ...

National Pollutant Discharge Elimination System (NPDES) S t o r m W a t e rP o l l u t i o n...W h a ty o us h o u l dk n o w Many industrial facilities
and manufacturing operations
must obtain coverage under the
Industrial Activities Storm W ater
General Permit

FIND OUT

IF YOUR FACILITY

MUST OBTAIN A PERMIT
S t o r m W a t e rP o l l u t i o n...W h a ty o us h o u l dk n o w National Pollutant Discharge Elimination System (NPDES) In 1987, the Federal Clean Water Act was amended to establish a framework for regulating industrial stormwater discharges under the NPDES permit program. In California, NPDES permits are issued by the State Water Resources Control Board (SWRCB) and the nine (9) Regional Water Quality Control Boards (RWQCB). In general, certain industrial facilities and manufacturing operations must obtain coverage under the Industrial Activities Storm Water General Permit if the type of facilities or operations falls into one of the several categories described in this brochure.

For more information on the General Industrial
Storm Water Permit contact:

State Water Resources Control Board (SWRCB)
(916) 657-1146 or www.swrcb.ca.gov/ or, at your
Regional Water Quality Control Board (RWQCB).

Santa Ana Region (8)
California T ower
3737 Main Street, Ste. 500
Riverside, CA 92501-3339
(909) 782-4130
San Diego Region (9)
9771 Clairemont Mesa Blvd., Ste. A
San Diego, CA 92124
(619) 467-2952
Colorado River Basin Region (7)
73-720 Fred Waring Dr., Ste. 100
Palm Desert, CA 92260
(760) 346-7491
StormWater
CleanWater

PROTECTION PROGRAM
SPILL RESPONSE AGENCY:

HAZARDOUS WASTE DISPOSAL:

RECYCLING INFORMATION:

TO REPORT ILLEGAL DUMPING OR A CLOGGED
STORM DRAIN:

HAZ-MAT: (909) 358-5055
(909) 358-5055
1-800-366-SAVE
1-800-506-2555
T o order additional brochures or to obtain information on other pollution prevention activities, call:
(909) 955-1111.

Riverside County gratefully acknowledges the State
Water Quality Control Board and the American Public
Works Association, Storm Water Quality T ask Force for
the information provided in this brochure.

DID YOU KNOW ...

YOUR FACILITY MAY

NEED AS TORM WATER
PERMIT?
For Information:

AB M Pi s...

How Do I Know If I Need A Permit? What are the requirements of the Industrial Activities Storm Water General Permit?
Following are of the
industry categories types that are regulated by the
Industrial Activities Storm Water General Permit.

Contact your local Region Water Quality Control
Board to determine if your facility/operation
requires coverage under the Permit.

Facilities such as cement manufacturing;
feedlots; fertilizer manufacturing; petroleum
refining; phosphate manufacturing; steam electric
power generation; coal mining; mineral mining
and processing; ore mining and dressing; and
asphalt emulsion;
general descriptions
Facilities classified as lumber and wood
products (except wood kitchen cabinets); pulp,
paper, and paperboard mills; chemical producers
(except some pharmaceutical and biological
products); petroleum and coal products; leather
production and products; stone, clay and glass
products; primary metal industries; fabricated
structural metal; ship and boat building and
repairing;
Active or inactive mining operations and
oil and gas exploration, production, processing, or
treatment operations;
Hazardous waste treatment, storage, or
disposal facilities;
/c220
/c220
/c220
/c220
/c220
/c220
/c220
/c220
/c220
/c220
Landfills, land application sites and open
dumps that receive or have received any industrial
waste; unless there is a new overlying land use
such as a golf course, park, etc., and there is no
discharge associated with the landfill;
Facilities involved in the recycling of
materials, including metal scrap yards, battery
reclaimers, salvage yards, and automobile
junkyards;
Steam electric power generating facilities,
facilities that generate steam for electric power by
combustion;
Transportation facilities that have vehicle
maintenance shops, fueling facilities, equipment
cleaning operations, or airport deicing operations.

This includes school bus maintenance facilities
operated by a school district;
Sewage treatment facilities;
Facilities that have areas where material
handling equipment or activities, raw materials,
intermediate products, final products, waste
materials, by-products, or industrial machinery
are exposed to storm water.

How do I obtain coverage under the
Industrial Activities Storm Water General Permit?
Obtain a permit application package from your local Regional Water Quality Control Board listed on the back of this brochure or the State Water Resources Control Board (SWRCB). Submit a completed Notice of Intent (NOI) form, site map and the appropriate fee ($250 or $500) to the SWRCB. Facilities must submit an NOI thirty (30) days prior to beginning operation. Once you submit the NOI, the State Board will send you a letter acknowledging receipt of your NOI and will assign your facility a waste discharge identification number (WDID No.). You will also receive an annual fee billing. These billings should roughly coincide with the date the State Board processed your original NOI submittal.

WARNING: There are significant penalties for non-compliance: a minimum fine of $5,000 for failing to obtain permit coverage, and, up to $10,000 per day, per violation plus $10 per gallon of discharge in excess of 1,000 gallons. any
discharge to a storm drain system that is not
composed entirely of storm water. The following
non-storm water discharges are authorized by the
General Permit: fire hydrant flushing; potable
water sources, including potable water related to
the operation, maintenance, or testing of potable
water systems; drinking fountain water;
atmospheric condensates including refrigeration,
air conditioning, and compressor condensate;
irrigation drainage; landscape watering; springs;
non-contaminated ground water; foundation or
footing drainage; and sea water infiltration where
the sea waters are discharged back into the sea
water source.

A Non-Storm Water Discharge is...

The basic requirements of the Permit are:

The facility must eliminate any non-stormwater discharges or obtain a separate permit for such discharges.

The facility must develop and implement a Storm Water Pollution Prevention Plan (SWPPP). The SWPPP must identify sources of pollutants that may be exposed to stormwater. Once the sources of pollutants have been identified, the facility operator must develop and implement Best Management Practices (BMPs) to minimize or prevent polluted runoff.

The facility must develop and implement a Monitoring Program that includes conducting visual observations and collecting samples of the facility’s storm water discharges associated with industrial activity. The General Permit requires that the analysis be conducted by a laboratory that is certified by the State of California.

The facility must submit to the Regional Board, every July 1, an annual report that includes the results of its monitoring program.

1. 2.

3. 4.

Guidance in preparing a SWPPP is available from a document prepared by the California Storm Water Quality Task Force called the California Storm Water Best Management Practice Handbook. a technique, process, activity,
or structure used to reduce the pollutant content of
a storm water discharge. BMPs may include
simple, non-structural methods such as good
housekeeping, staff training and preventive
maintenance. Additionally, BMPs may include
structural modifications such as the installation of
berms, canopies or treatment control (e.g. setting
basins, oil/water separators, etc.)

Riverside City CouncilJanuary 25, 2022

Riverside City Council
January 25, 2022