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HomeMy WebLinkAboutDrainage Report 03-17-21 170184001 Napleton Auxiliary Lot And Detail Center Napleton Auxiliary Lot And Detail Center 4538 E. 96th Street Carmel, IN 46280 Drainage Report Original: March 17, 2021 Prepared For: Napleton Automotive Group One Oakbrook Terrace, Suite 600 Oakbrook Terrace, Illinois 60181 Prepared By: Kimley-Horn and Associates, Inc. 250 East 96th Street, Suite 580 Indianapolis, IN 46240 Phone: (317) 218-9561 170184001 Napleton Auxiliary Lot And Detail Center TABLE OF CONTENTS 1.0. PROJECT SUMMARY 2.0. INTRODUCTION 3.0. EXISTING CONDITIONS 4.0. PROPOSED CONDITIONS Appendix A: Project Site Maps Appendix B: Existing Drainage Conditions Appendix C: Proposed Basin Conditions Appendix D: Storm Sewer Calculations 170184001 Napleton Auxiliary Lot And Detail Center 1.0 Project Summary Project Name: Napleton Auxiliary Lot And Detail Center Location: 4538 E. 96th Street Report Type: Drainage Report Reviewing Agency: City of Carmel Storm Sewer Sizing: Rational Method Basin Runoff Calculations: USDA NRCS TR-55 Stormwater Quality: Aquaswirls with Wet Pond and Extended Dry Detention Basin (EDDB) Stormwater Quantity: Expanded existing pond & New EDDB Design Standards: City of Carmel Stormwater Technical Manual 1.0. Introduction Kimley-Horn and Associates, Inc. has been retained Napleton Automotive Group to provide civil engineering services for site improvements to the existing dealership including a new service building, pad for a future building and associated passenger and inventory parking and circulation areas located on 4538 E. 96th Street in Carmel, Indiana. The project consists of the development of ±8.75 acres into a 13,515 SF building with a pad for a future 18,000 SF building as well as internal road, parking, and utility infrastructure. A second driveway connecting to Randall Drive will also be included. The site will drain to the existing wet pond to the south. Water quality will be provided by hydrodynamic separators and the ponds. 2.0. Existing Conditions FEMA According to FEMA Flood Insurance Rate Map 18057C0236G dated November 19, 2014 with LOMR 14- 05-1139P effective 6/19/2015 and LOMR 18-05-0387P effective 6/27/2018 provided in Appendix A, the site resides within “Zone AE” which corresponds to areas determined to be inside the 0.2% annual chance floodplain. Compensatory storage will be provided because of this project. See compensatory storage report. Soil Characteristics Per the United States Geological Survey’s (USGS) Natural Resources Conservation Service (NRCS) Web Soil Survey, the site soil consists of Urban Land – Westland silty clay loam complex (UwtA) and Westland silty clay loam-Urban land complex (YwqA). Refer to Appendix A for the NRCS Web Soil Survey information. Existing Site Features The total existing site consists of approximately 8.75 acres of mostly wooded area with some remains of a former residential building. As described by the “Drainage Computations Summary for Butler Hyundai” (stamped April 2014 by Carmel City Engineer), the 8.75 acres characterized as offsite basin drain to the 170184001 Napleton Auxiliary Lot And Detail Center now existing wet pond. This “offsite” basin was assigned a CN of 60 with time of concentration of 34.73 minutes (Refer to Appendix B for existing drainage map and a copy of the drainage report by others). 2-year 10-year 100-year Existing Basin 0.21 cfs 2.15 cfs 11.46 cfs 3.0. Proposed Conditions The 8.75 acres “offsite” basin delineated by the drainage report by others, as explained in the previous section, is now the proposed site. The wet pond factored in the offsite as part of pond sizing for bypass but not rate control. The original assumption also did not include the basin in the developed condition since a curve number of 60 was assigned. Therefore, the approach taken for this drainage report is to mimic the original model including similar drainage areas and outlet control structures to establish a baseline. The original dry detention pond will be expanded and converted into a wet pond. A new and separate dry detention pond will also be constructed to offset the increase in runoff from the developed condition. Ultimately, this drainage report attempts to prove that the original outlet control structure can still handle the increased runoff with adjusted release rates described below. The proposed site will drain via sheet and shallow concentrated flow to proposed storm sewer on site. The proposed development utilizes reinforced concrete piping to convey the runoff from the site to either the new dry detention pond or the converted wet pond. The new dry detention pond will outlet into the wet pond. The proposed storm sewer has been designed to meet the intent of the City of Carmel Stormwater Technical Standards Manual (Refer to Appendix D for proposed storm sewer calculations). The storm sewer was designed to ensure no adverse impact on adjacent landowners. The proposed site will discharge to the existing wet pond south of the development. Due to the fact this site is an expansion of a previous development, it is the desire is to avoid any modifications of the existing outlet control structure but expand the volume required to store the increase in runoff. The original release rate for 10 year and 100 year will be added by the new development at the typical 0.1 cfs/acre and 0.3/acre rate control requirement for 10 year and 100 year respectively. The resulting 100-year high water level will also be checked to ensure the resulting elevation will still not affect surrounding areas especially buildings’ finished floor elevation being at least 2’ above. Due to topographic constraints and the need to fill the site at or above the BFE of 740, it was not possible for the entire proposed site to be collected and discharged to the proposed detention basin. To compensate for this, the area of 0.49 total acres in which includes a part of the ROW area was subtracted from the detention calculation allowable release rates resulting in 8.26 acres with the additional release rate of 0.83 cfs and 2.48 cfs for 10 and 100 year storm respectively. 170184001 Napleton Auxiliary Lot And Detail Center The resulting calculations concluded that the existing outlet control structure will still meet the rate control requirements with the expanded volume actually resulting in lowering the 100 year water level even though the peak flow increased. Ultimately, this concludes that the floodplain BFE will govern the proposed building FFEs. The table below summarizes the proposed runoff from the site using the SCS Curve Number method and HydroCAD (Refer to Appendix C for calculations). Refer to Appendix C for detailed calculations. Existing Wet Detention Pond Summary (Site Discharge) 10-YEAR 100-YEAR 100-YEAR WSEL ORIGINAL (From Report) 1.53 cfs 3.39 cfs 738.88 ADDITION 0.83 cfs 2.48 cfs N/A TOTAL 2.36 cfs 5.87 cfs ≤738.92 PROPOSED 1.52 cfs 3.58 cfs 738.06 Floodplain BFE 840.00 The original development occurred in the floodplain. Compensatory storage was provided at an offsite parcel off 116th st. This proposed site also will occur in the same floodplain. The pond excavated offsite for the original compensatory storage will be expanded to provide the additional required compensatory storage for this site. See compensatory storage report for more details. Stormwater Quality Per the City of Carmel’s Stormwater Technical Standards, two Water Quality BMPs are required in series to treat the first flush of a typical 1” rainfall event. The first BMP in series will be a hydrodynamic separator (Aquaswirl). This will provide the first line of protection. The second BMP in series is the new extended dry detention pond and the expansion and conversion of the existing dry detention pond into a wet pond. Dry and Wet ponds are on Table 701-1’s pre-approved BMPs. In addition, there is an existing wet pond receiving the detained flow from the proposed wet pond in which will provide an optional third line of defense. Conclusions The proposed drainage design for this project has been designed to meet the intent of the City of Carmel’s Stormwater Technical Standards. No adverse impacts are anticipated to affect any adjacent or downstream properties. 170184001 Napleton Auxiliary Lot And Detail Center Appendix A: Project Site Maps Nap leto n Detail Cen ter Drainage Report Exhibit 1 mi N➤➤N © 2021 Google © 2021 Google © 2021 Google National Flood Hazard Layer FIRMette 0 500 1,000 1,500 2,000250 Feet Ü SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT SPECIAL FLOOD HAZARD AREAS Without Base Flood Elevation (BFE) Zone A, V, A99 With BFE or DepthZone AE, AO, AH, VE, AR Regulatory Floodway 0.2% Annual Chance Flood Hazard, Areas of 1% annual chance flood with average depth less than one foot or with drainage areas of less than one square mileZone X Future Conditions 1% Annual Chance Flood HazardZone X Area with Reduced Flood Risk due to Levee. See Notes.Zone X Area with Flood Risk due to LeveeZone D NO SCREEN Area of Minimal Flood Hazard Zone X Area of Undetermined Flood HazardZone D Channel, Culvert, or Storm Sewer Levee, Dike, or Floodwall Cross Sections with 1% Annual Chance 17.5 Water Surface Elevation Coastal Transect Coastal Transect Baseline Profile Baseline Hydrographic Feature Base Flood Elevation Line (BFE) Effective LOMRs Limit of Study Jurisdiction Boundary Digital Data Available No Digital Data Available Unmapped This map complies with FEMA's standards for the use of digital flood maps if it is not void as described below. The basemap shown complies with FEMA's basemap accuracy standards The flood hazard information is derived directly from the authoritative NFHL web services provided by FEMA. This map was exported on 2/19/2021 at 12:22 PM and does not reflect changes or amendments subsequent to this date and time. The NFHL and effective information may change or become superseded by new data over time. This map image is void if the one or more of the following map elements do not appear: basemap imagery, flood zone labels, legend, scale bar, map creation date, community identifiers, FIRM panel number, and FIRM effective date. Map images for unmapped and unmodernized areas cannot be used for regulatory purposes. Legend OTHER AREAS OF FLOOD HAZARD OTHER AREAS GENERAL STRUCTURES OTHER FEATURES MAP PANELS 8 B 20.2 The pin displayed on the map is an approximate point selected by the user and does not represent an authoritative property location. 1:6,000 86°6'6"W 39°55'58"N 86°5'28"W 39°55'30"N Basemap: USGS National Map: Orthoimagery: Data refreshed October, 2020 National Flood Hazard Layer FIRMette 0 500 1,000 1,500 2,000250 Feet Ü SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT SPECIAL FLOOD HAZARD AREAS Without Base Flood Elevation (BFE) Zone A, V, A99 With BFE or DepthZone AE, AO, AH, VE, AR Regulatory Floodway 0.2% Annual Chance Flood Hazard, Areas of 1% annual chance flood with average depth less than one foot or with drainage areas of less than one square mileZone X Future Conditions 1% Annual Chance Flood HazardZone X Area with Reduced Flood Risk due to Levee. See Notes.Zone X Area with Flood Risk due to LeveeZone D NO SCREEN Area of Minimal Flood Hazard Zone X Area of Undetermined Flood HazardZone D Channel, Culvert, or Storm Sewer Levee, Dike, or Floodwall Cross Sections with 1% Annual Chance 17.5 Water Surface Elevation Coastal Transect Coastal Transect Baseline Profile Baseline Hydrographic Feature Base Flood Elevation Line (BFE) Effective LOMRs Limit of Study Jurisdiction Boundary Digital Data Available No Digital Data Available Unmapped This map complies with FEMA's standards for the use of digital flood maps if it is not void as described below. The basemap shown complies with FEMA's basemap accuracy standards The flood hazard information is derived directly from the authoritative NFHL web services provided by FEMA. This map was exported on 2/19/2021 at 12:41 PM and does not reflect changes or amendments subsequent to this date and time. The NFHL and effective information may change or become superseded by new data over time. This map image is void if the one or more of the following map elements do not appear: basemap imagery, flood zone labels, legend, scale bar, map creation date, community identifiers, FIRM panel number, and FIRM effective date. Map images for unmapped and unmodernized areas cannot be used for regulatory purposes. Legend OTHER AREAS OF FLOOD HAZARD OTHER AREAS GENERAL STRUCTURES OTHER FEATURES MAP PANELS 8 B 20.2 The pin displayed on the map is an approximate point selected by the user and does not represent an authoritative property location. 1:6,000 86°8'22"W 39°57'44"N 86°7'45"W 39°57'17"N Basemap: USGS National Map: Orthoimagery: Data refreshed October, 2020 Hydrologic Soil Group—Hamilton County, Indiana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 2/19/2021 Page 1 of 44420240442027044203004420330442036044203904420420442045044202404420270442030044203304420360442039044204204420450576990577020577050577080577110577140577170577200577230577260577290577320 576990 577020 577050 577080 577110 577140 577170 577200 577230 577260 577290 577320 39° 55' 50'' N 86° 5' 56'' W39° 55' 50'' N86° 5' 42'' W39° 55' 43'' N 86° 5' 56'' W39° 55' 43'' N 86° 5' 42'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 16N WGS84 0 50 100 200 300 Feet 0 20 40 80 120 Meters Map Scale: 1:1,600 if printed on A landscape (11" x 8.5") sheet. Soil Map may not be valid at this scale. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Rating Polygons A A/D B B/D C C/D D Not rated or not available Soil Rating Lines A A/D B B/D C C/D D Not rated or not available Soil Rating Points A A/D B B/D C C/D D Not rated or not available Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:15,800. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Hamilton County, Indiana Survey Area Data: Version 21, Jun 4, 2020 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Aug 1, 2018—Sep 30, 2018 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Hydrologic Soil Group—Hamilton County, Indiana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 2/19/2021 Page 2 of 4 Hydrologic Soil Group Map unit symbol Map unit name Rating Acres in AOI Percent of AOI UmqA Urban land-Sleeth loam complex, 0 to 2 percent slopes 0.1 1.4% UwtA Urban land-Westland silty clay loam complex, 0 to 2 percent slopes 1.1 11.4% YwqA Westland silty clay loam-Urban land complex, 0 to 2 percent slopes B/D 8.2 87.2% Totals for Area of Interest 9.4 100.0% Hydrologic Soil Group—Hamilton County, Indiana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 2/19/2021 Page 3 of 4 Description Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. Rating Options Aggregation Method: Dominant Condition Component Percent Cutoff: None Specified Tie-break Rule: Higher Hydrologic Soil Group—Hamilton County, Indiana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 2/19/2021 Page 4 of 4 Hydrologic Soil Group—Hamilton County, Indiana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 2/19/2021 Page 1 of 444234704423490442351044235304423550442357044235904423610442363044236504423470442349044235104423530442355044235704423590442361044236304423650573870573890573910573930573950573970573990574010 573870 573890 573910 573930 573950 573970 573990 574010 39° 57' 35'' N 86° 8' 6'' W39° 57' 35'' N86° 8' 0'' W39° 57' 28'' N 86° 8' 6'' W39° 57' 28'' N 86° 8' 0'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 16N WGS84 0 45 90 180 270 Feet 0 10 20 40 60 Meters Map Scale: 1:991 if printed on A portrait (8.5" x 11") sheet. Soil Map may not be valid at this scale. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Rating Polygons A A/D B B/D C C/D D Not rated or not available Soil Rating Lines A A/D B B/D C C/D D Not rated or not available Soil Rating Points A A/D B B/D C C/D D Not rated or not available Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:15,800. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Hamilton County, Indiana Survey Area Data: Version 21, Jun 4, 2020 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Aug 1, 2018—Sep 30, 2018 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Hydrologic Soil Group—Hamilton County, Indiana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 2/19/2021 Page 2 of 4 Hydrologic Soil Group Map unit symbol Map unit name Rating Acres in AOI Percent of AOI YbvA Brookston silty clay loam-Urban land complex, 0 to 2 percent slopes B/D 0.1 7.8% YclA Crosby silt loam, fine- loamy subsoil-Urban land complex, 0 to 2 percent slopes C/D 0.5 36.2% YshAH Shoals silt loam-Urban land complex, 0 to 2 percent slopes, frequently flooded, brief duration B/D 0.7 56.0% Totals for Area of Interest 1.3 100.0% Hydrologic Soil Group—Hamilton County, Indiana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 2/19/2021 Page 3 of 4 Description Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. Rating Options Aggregation Method: Dominant Condition Component Percent Cutoff: None Specified Tie-break Rule: Higher Hydrologic Soil Group—Hamilton County, Indiana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 2/19/2021 Page 4 of 4 170184001 Napleton Auxiliary Lot And Detail Center Appendix B: Existing Basin Conditions RANDALL DRIVERANDALL DRIVEMarch 15, 2021 0'80'40'NORTHNAPLETON AUTOMOTIVE GROUP EXISTING DRAINAGE AREA MAP 17S Proposed (Ex) 28S Offsite (Ex) 18P Wet Pond (EX) Routing Diagram for Detention - 170184001 Prepared by Kimley-Horn, Printed 3/15/2021 HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 2HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Rainfall Events Listing (selected events) Event# Event Name Storm Type Curve Mode Duration (hours) B/B Depth (inches) AMC 1 10 Yr-24 Hrs Type II 24-hr Default 24.00 1 3.83 2 2 100 Yr-24 Hrs Type II 24-hr Default 24.00 1 6.46 2 Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 3HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Area Listing (selected nodes) Area (acres) CN Description (subcatchment-numbers) 12.080 90 (17S) 8.750 60 (28S) 20.830 77 TOTAL AREA Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 4HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Soil Listing (selected nodes) Area (acres) Soil Group Subcatchment Numbers 0.000 HSG A 0.000 HSG B 0.000 HSG C 0.000 HSG D 20.830 Other 17S, 28S 20.830 TOTAL AREA Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 5HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Ground Covers (selected nodes) HSG-A (acres) HSG-B (acres) HSG-C (acres) HSG-D (acres) Other (acres) Total (acres) Ground Cover Subcatchment Numbers 0.000 0.000 0.000 0.000 20.830 20.830 17S, 28S 0.000 0.000 0.000 0.000 20.830 20.830 TOTAL AREA Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 6HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=12.080 ac 0.00% Impervious Runoff Depth=2.76"Subcatchment 17S: Proposed (Ex) Tc=8.9 min CN=90 Runoff=50.76 cfs 2.777 af Runoff Area=8.750 ac 0.00% Impervious Runoff Depth=0.68"Subcatchment 28S: Offsite (Ex) Tc=34.7 min CN=60 Runoff=3.43 cfs 0.496 af Peak Elev=736.55' Storage=89,288 cf Inflow=51.15 cfs 3.273 afPond 18P: Wet Pond (EX) Outflow=1.64 cfs 3.250 af Total Runoff Area = 20.830 ac Runoff Volume = 3.273 af Average Runoff Depth = 1.89" 100.00% Pervious = 20.830 ac 0.00% Impervious = 0.000 ac Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 7HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 17S: Proposed (Ex) Runoff = 50.76 cfs @ 12.00 hrs, Volume= 2.777 af, Depth= 2.76" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83" Area (ac) CN Description * 12.080 90 12.080 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.9 Direct Entry, Direct Entry Subcatchment 17S: Proposed (Ex) Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420Flow (cfs)55 50 45 40 35 30 25 20 15 10 5 0 Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83" Runoff Area=12.080 ac Runoff Volume=2.777 af Runoff Depth=2.76" Tc=8.9 min CN=90 50.76 cfs Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 9HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 28S: Offsite (Ex) Runoff = 3.43 cfs @ 12.37 hrs, Volume= 0.496 af, Depth= 0.68" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83" Area (ac) CN Description * 8.750 60 8.750 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 34.7 Direct Entry, Direct Entry Subcatchment 28S: Offsite (Ex) Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420Flow (cfs)3 2 1 0 Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83" Runoff Area=8.750 ac Runoff Volume=0.496 af Runoff Depth=0.68" Tc=34.7 min CN=60 3.43 cfs Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 11HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Summary for Pond 18P: Wet Pond (EX) Inflow Area = 20.830 ac, 0.00% Impervious, Inflow Depth = 1.89" for 10 Yr-24 Hrs event Inflow = 51.15 cfs @ 12.00 hrs, Volume= 3.273 af Outflow = 1.64 cfs @ 15.40 hrs, Volume= 3.250 af, Atten= 97%, Lag= 204.0 min Primary = 1.64 cfs @ 15.40 hrs, Volume= 3.250 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 736.55' @ 15.40 hrs Surf.Area= 38,163 sf Storage= 89,288 cf Plug-Flow detention time= 686.6 min calculated for 3.248 af (99% of inflow) Center-of-Mass det. time= 683.7 min ( 1,502.1 - 818.4 ) Volume Invert Avail.Storage Storage Description #1 733.30' 175,277 cf Custom Stage Data (Prismatic) Listed below (Recalc) #2 733.70' 78,218 cf Custom Stage Data (Prismatic) Listed below (Recalc) 253,494 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 733.30 19,079 0 0 734.00 20,473 13,843 13,843 735.00 22,564 21,519 35,362 736.00 24,655 23,610 58,971 737.00 26,833 25,744 84,715 738.00 29,011 27,922 112,637 739.00 31,320 30,166 142,803 740.00 33,628 32,474 175,277 Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 733.70 0 0 0 734.00 457 69 69 735.00 4,726 2,592 2,660 736.00 10,502 7,614 10,274 737.00 13,822 12,162 22,436 738.00 16,967 15,395 37,831 739.00 20,177 18,572 56,403 740.00 23,453 21,815 78,218 Device Routing Invert Outlet Devices #1 Primary 733.30'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #2 Primary 736.85'6.2" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Primary 739.22'48.0" x 48.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=1.64 cfs @ 15.40 hrs HW=736.55' (Free Discharge) 1=Orifice/Grate (Orifice Controls 1.64 cfs @ 8.34 fps) 2=Orifice/Grate ( Controls 0.00 cfs) 3=Orifice/Grate ( Controls 0.00 cfs) Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 12HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Pond 18P: Wet Pond (EX) Inflow Primary Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420Flow (cfs)55 50 45 40 35 30 25 20 15 10 5 0 Inflow Area=20.830 ac Peak Elev=736.55' Storage=89,288 cf 51.15 cfs 1.64 cfs Pond 18P: Wet Pond (EX) Primary Stage-Discharge Discharge (cfs) 4038363432302826242220181614121086420Elevation (feet)740 739 738 737 736 735 734 Orifice/Grate Orifice/Grate Orifice/Grate Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 13HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Pond 18P: Wet Pond (EX) Storage Stage-Area-Storage Storage (cubic-feet) 250,000200,000150,000100,00050,0000Elevation (feet)740 739 738 737 736 735 734 Custom Stage Data Custom Stage Data Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 14HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Hydrograph for Pond 18P: Wet Pond (EX) Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Primary (cfs) 0.00 0.00 0 733.30 0.00 2.50 0.00 0 733.30 0.00 5.00 0.01 5 733.30 0.00 7.50 0.26 1,141 733.36 0.01 10.00 0.87 5,068 733.56 0.18 12.50 8.08 75,260 736.17 1.53 15.00 1.79 89,180 736.54 1.64 17.50 1.15 87,049 736.49 1.62 20.00 0.80 81,429 736.34 1.58 22.50 0.71 74,160 736.14 1.52 25.00 0.01 65,052 735.88 1.44 27.50 0.00 52,619 735.50 1.32 30.00 0.00 41,340 735.12 1.18 32.50 0.00 31,343 734.75 1.03 35.00 0.00 22,757 734.40 0.87 37.50 0.00 15,714 734.09 0.69 40.00 0.00 10,354 733.83 0.50 42.50 0.00 6,782 733.65 0.29 45.00 0.00 4,786 733.55 0.16 47.50 0.00 3,629 733.49 0.10 50.00 0.00 2,897 733.45 0.07 52.50 0.00 2,400 733.42 0.05 55.00 0.00 2,044 733.41 0.03 57.50 0.00 1,776 733.39 0.03 60.00 0.00 1,569 733.38 0.02 62.50 0.00 1,404 733.37 0.02 65.00 0.00 1,269 733.37 0.01 67.50 0.00 1,158 733.36 0.01 70.00 0.00 1,064 733.36 0.01 Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 15HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Stage-Discharge for Pond 18P: Wet Pond (EX) Elevation (feet) Primary (cfs) 733.30 0.00 733.35 0.01 733.40 0.03 733.45 0.07 733.50 0.11 733.55 0.17 733.60 0.23 733.65 0.30 733.70 0.36 733.75 0.43 733.80 0.47 733.85 0.52 733.90 0.56 733.95 0.60 734.00 0.63 734.05 0.67 734.10 0.70 734.15 0.73 734.20 0.76 734.25 0.79 734.30 0.82 734.35 0.85 734.40 0.87 734.45 0.90 734.50 0.92 734.55 0.95 734.60 0.97 734.65 0.99 734.70 1.01 734.75 1.04 734.80 1.06 734.85 1.08 734.90 1.10 734.95 1.12 735.00 1.14 735.05 1.16 735.10 1.18 735.15 1.20 735.20 1.21 735.25 1.23 735.30 1.25 735.35 1.27 735.40 1.29 735.45 1.30 735.50 1.32 735.55 1.34 735.60 1.35 735.65 1.37 735.70 1.39 735.75 1.40 735.80 1.42 735.85 1.43 Elevation (feet) Primary (cfs) 735.90 1.45 735.95 1.46 736.00 1.48 736.05 1.49 736.10 1.51 736.15 1.52 736.20 1.54 736.25 1.55 736.30 1.57 736.35 1.58 736.40 1.60 736.45 1.61 736.50 1.62 736.55 1.64 736.60 1.65 736.65 1.66 736.70 1.68 736.75 1.69 736.80 1.70 736.85 1.72 736.90 1.74 736.95 1.77 737.00 1.82 737.05 1.88 737.10 1.95 737.15 2.03 737.20 2.11 737.25 2.19 737.30 2.27 737.35 2.34 737.40 2.40 737.45 2.46 737.50 2.51 737.55 2.56 737.60 2.61 737.65 2.66 737.70 2.70 737.75 2.75 737.80 2.79 737.85 2.83 737.90 2.87 737.95 2.91 738.00 2.95 738.05 2.99 738.10 3.02 738.15 3.06 738.20 3.09 738.25 3.13 738.30 3.16 738.35 3.20 738.40 3.23 738.45 3.26 Elevation (feet) Primary (cfs) 738.50 3.29 738.55 3.33 738.60 3.36 738.65 3.39 738.70 3.42 738.75 3.45 738.80 3.48 738.85 3.51 738.90 3.54 738.95 3.57 739.00 3.60 739.05 3.62 739.10 3.65 739.15 3.68 739.20 3.71 739.25 4.01 739.30 4.95 739.35 6.24 739.40 7.81 739.45 9.61 739.50 11.62 739.55 13.81 739.60 16.17 739.65 18.70 739.70 21.37 739.75 24.18 739.80 27.13 739.85 30.21 739.90 33.41 739.95 36.73 740.00 40.16 Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 16HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 18P: Wet Pond (EX) Elevation (feet) Storage (cubic-feet) 733.30 0 733.35 956 733.40 1,918 733.45 2,884 733.50 3,856 733.55 4,832 733.60 5,813 733.65 6,800 733.70 7,791 733.75 8,789 733.80 9,796 733.85 10,812 733.90 11,836 733.95 12,870 734.00 13,912 734.05 14,966 734.10 16,037 734.15 17,123 734.20 18,225 734.25 19,343 734.30 20,477 734.35 21,627 734.40 22,793 734.45 23,974 734.50 25,172 734.55 26,385 734.60 27,615 734.65 28,860 734.70 30,121 734.75 31,398 734.80 32,691 734.85 34,000 734.90 35,325 734.95 36,665 735.00 38,022 735.05 39,396 735.10 40,790 735.15 42,204 735.20 43,637 735.25 45,090 735.30 46,563 735.35 48,055 735.40 49,567 735.45 51,099 735.50 52,650 735.55 54,221 735.60 55,812 735.65 57,422 735.70 59,052 735.75 60,702 735.80 62,371 735.85 64,060 Elevation (feet) Storage (cubic-feet) 735.90 65,769 735.95 67,497 736.00 69,245 736.05 71,010 736.10 72,788 736.15 74,581 736.20 76,387 736.25 78,206 736.30 80,040 736.35 81,887 736.40 83,748 736.45 85,623 736.50 87,511 736.55 89,413 736.60 91,329 736.65 93,259 736.70 95,202 736.75 97,159 736.80 99,130 736.85 101,115 736.90 103,113 736.95 105,125 737.00 107,151 737.05 109,191 737.10 111,243 737.15 113,309 737.20 115,389 737.25 117,481 737.30 119,587 737.35 121,707 737.40 123,839 737.45 125,985 737.50 128,144 737.55 130,317 737.60 132,502 737.65 134,701 737.70 136,914 737.75 139,140 737.80 141,379 737.85 143,631 737.90 145,897 737.95 148,176 738.00 150,468 738.05 152,774 738.10 155,093 738.15 157,427 738.20 159,774 738.25 162,135 738.30 164,510 738.35 166,898 738.40 169,300 738.45 171,717 Elevation (feet) Storage (cubic-feet) 738.50 174,147 738.55 176,590 738.60 179,048 738.65 181,519 738.70 184,005 738.75 186,503 738.80 189,016 738.85 191,543 738.90 194,083 738.95 196,637 739.00 199,205 739.05 201,787 739.10 204,383 739.15 206,993 739.20 209,616 739.25 212,254 739.30 214,906 739.35 217,571 739.40 220,251 739.45 222,944 739.50 225,652 739.55 228,373 739.60 231,109 739.65 233,858 739.70 236,621 739.75 239,399 739.80 242,190 739.85 244,995 739.90 247,814 739.95 250,647 740.00 253,494 Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 17HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=12.080 ac 0.00% Impervious Runoff Depth=5.29"Subcatchment 17S: Proposed (Ex) Tc=8.9 min CN=90 Runoff=93.74 cfs 5.330 af Runoff Area=8.750 ac 0.00% Impervious Runoff Depth=2.23"Subcatchment 28S: Offsite (Ex) Tc=34.7 min CN=60 Runoff=14.41 cfs 1.625 af Peak Elev=738.88' Storage=192,910 cf Inflow=97.80 cfs 6.955 afPond 18P: Wet Pond (EX) Outflow=3.52 cfs 6.920 af Total Runoff Area = 20.830 ac Runoff Volume = 6.955 af Average Runoff Depth = 4.01" 100.00% Pervious = 20.830 ac 0.00% Impervious = 0.000 ac Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 18HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 17S: Proposed (Ex) Runoff = 93.74 cfs @ 12.00 hrs, Volume= 5.330 af, Depth= 5.29" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46" Area (ac) CN Description * 12.080 90 12.080 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.9 Direct Entry, Direct Entry Subcatchment 17S: Proposed (Ex) Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420Flow (cfs)100 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46" Runoff Area=12.080 ac Runoff Volume=5.330 af Runoff Depth=5.29" Tc=8.9 min CN=90 93.74 cfs Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 20HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 28S: Offsite (Ex) Runoff = 14.41 cfs @ 12.32 hrs, Volume= 1.625 af, Depth= 2.23" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46" Area (ac) CN Description * 8.750 60 8.750 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 34.7 Direct Entry, Direct Entry Subcatchment 28S: Offsite (Ex) Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420Flow (cfs)16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46" Runoff Area=8.750 ac Runoff Volume=1.625 af Runoff Depth=2.23" Tc=34.7 min CN=60 14.41 cfs Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 22HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Summary for Pond 18P: Wet Pond (EX) Inflow Area = 20.830 ac, 0.00% Impervious, Inflow Depth = 4.01" for 100 Yr-24 Hrs event Inflow = 97.80 cfs @ 12.00 hrs, Volume= 6.955 af Outflow = 3.52 cfs @ 15.03 hrs, Volume= 6.920 af, Atten= 96%, Lag= 181.9 min Primary = 3.52 cfs @ 15.03 hrs, Volume= 6.920 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 738.88' @ 15.03 hrs Surf.Area= 50,818 sf Storage= 192,910 cf Plug-Flow detention time= 782.0 min calculated for 6.916 af (99% of inflow) Center-of-Mass det. time= 780.1 min ( 1,585.2 - 805.0 ) Volume Invert Avail.Storage Storage Description #1 733.30' 175,277 cf Custom Stage Data (Prismatic) Listed below (Recalc) #2 733.70' 78,218 cf Custom Stage Data (Prismatic) Listed below (Recalc) 253,494 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 733.30 19,079 0 0 734.00 20,473 13,843 13,843 735.00 22,564 21,519 35,362 736.00 24,655 23,610 58,971 737.00 26,833 25,744 84,715 738.00 29,011 27,922 112,637 739.00 31,320 30,166 142,803 740.00 33,628 32,474 175,277 Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 733.70 0 0 0 734.00 457 69 69 735.00 4,726 2,592 2,660 736.00 10,502 7,614 10,274 737.00 13,822 12,162 22,436 738.00 16,967 15,395 37,831 739.00 20,177 18,572 56,403 740.00 23,453 21,815 78,218 Device Routing Invert Outlet Devices #1 Primary 733.30'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #2 Primary 736.85'6.2" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Primary 739.22'48.0" x 48.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=3.52 cfs @ 15.03 hrs HW=738.88' (Free Discharge) 1=Orifice/Grate (Orifice Controls 2.18 cfs @ 11.11 fps) 2=Orifice/Grate (Orifice Controls 1.34 cfs @ 6.40 fps) 3=Orifice/Grate ( Controls 0.00 cfs) Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 23HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Pond 18P: Wet Pond (EX) Inflow Primary Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420Flow (cfs)105 100 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 Inflow Area=20.830 ac Peak Elev=738.88' Storage=192,910 cf 97.80 cfs 3.52 cfs Pond 18P: Wet Pond (EX) Primary Stage-Discharge Discharge (cfs) 4038363432302826242220181614121086420Elevation (feet)740 739 738 737 736 735 734 Orifice/Grate Orifice/Grate Orifice/Grate Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 24HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Pond 18P: Wet Pond (EX) Storage Stage-Area-Storage Storage (cubic-feet) 250,000200,000150,000100,00050,0000Elevation (feet)740 739 738 737 736 735 734 Custom Stage Data Custom Stage Data Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 25HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Hydrograph for Pond 18P: Wet Pond (EX) Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Primary (cfs) 0.00 0.00 0 733.30 0.00 2.50 0.00 0 733.30 0.00 5.00 0.31 987 733.35 0.01 7.50 0.82 5,326 733.58 0.20 10.00 2.08 13,677 733.99 0.63 12.50 20.57 162,260 738.25 3.13 15.00 3.55 192,908 738.88 3.52 17.50 2.25 186,230 738.74 3.45 20.00 1.56 173,101 738.48 3.28 22.50 1.37 157,526 738.15 3.06 25.00 0.02 139,563 737.76 2.75 27.50 0.00 117,160 737.24 2.18 30.00 0.00 100,209 736.83 1.71 32.50 0.00 85,270 736.44 1.61 35.00 0.00 71,294 736.06 1.50 37.50 0.00 58,342 735.68 1.38 40.00 0.00 46,502 735.30 1.25 42.50 0.00 35,885 734.92 1.11 45.00 0.00 26,618 734.56 0.95 47.50 0.00 18,831 734.23 0.78 50.00 0.00 12,662 733.94 0.59 52.50 0.00 8,227 733.72 0.39 55.00 0.00 5,582 733.59 0.21 57.50 0.00 4,103 733.51 0.12 60.00 0.00 3,204 733.47 0.08 62.50 0.00 2,613 733.44 0.05 65.00 0.00 2,198 733.41 0.04 67.50 0.00 1,893 733.40 0.03 70.00 0.00 1,660 733.39 0.02 Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 26HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Stage-Discharge for Pond 18P: Wet Pond (EX) Elevation (feet) Primary (cfs) 733.30 0.00 733.35 0.01 733.40 0.03 733.45 0.07 733.50 0.11 733.55 0.17 733.60 0.23 733.65 0.30 733.70 0.36 733.75 0.43 733.80 0.47 733.85 0.52 733.90 0.56 733.95 0.60 734.00 0.63 734.05 0.67 734.10 0.70 734.15 0.73 734.20 0.76 734.25 0.79 734.30 0.82 734.35 0.85 734.40 0.87 734.45 0.90 734.50 0.92 734.55 0.95 734.60 0.97 734.65 0.99 734.70 1.01 734.75 1.04 734.80 1.06 734.85 1.08 734.90 1.10 734.95 1.12 735.00 1.14 735.05 1.16 735.10 1.18 735.15 1.20 735.20 1.21 735.25 1.23 735.30 1.25 735.35 1.27 735.40 1.29 735.45 1.30 735.50 1.32 735.55 1.34 735.60 1.35 735.65 1.37 735.70 1.39 735.75 1.40 735.80 1.42 735.85 1.43 Elevation (feet) Primary (cfs) 735.90 1.45 735.95 1.46 736.00 1.48 736.05 1.49 736.10 1.51 736.15 1.52 736.20 1.54 736.25 1.55 736.30 1.57 736.35 1.58 736.40 1.60 736.45 1.61 736.50 1.62 736.55 1.64 736.60 1.65 736.65 1.66 736.70 1.68 736.75 1.69 736.80 1.70 736.85 1.72 736.90 1.74 736.95 1.77 737.00 1.82 737.05 1.88 737.10 1.95 737.15 2.03 737.20 2.11 737.25 2.19 737.30 2.27 737.35 2.34 737.40 2.40 737.45 2.46 737.50 2.51 737.55 2.56 737.60 2.61 737.65 2.66 737.70 2.70 737.75 2.75 737.80 2.79 737.85 2.83 737.90 2.87 737.95 2.91 738.00 2.95 738.05 2.99 738.10 3.02 738.15 3.06 738.20 3.09 738.25 3.13 738.30 3.16 738.35 3.20 738.40 3.23 738.45 3.26 Elevation (feet) Primary (cfs) 738.50 3.29 738.55 3.33 738.60 3.36 738.65 3.39 738.70 3.42 738.75 3.45 738.80 3.48 738.85 3.51 738.90 3.54 738.95 3.57 739.00 3.60 739.05 3.62 739.10 3.65 739.15 3.68 739.20 3.71 739.25 4.01 739.30 4.95 739.35 6.24 739.40 7.81 739.45 9.61 739.50 11.62 739.55 13.81 739.60 16.17 739.65 18.70 739.70 21.37 739.75 24.18 739.80 27.13 739.85 30.21 739.90 33.41 739.95 36.73 740.00 40.16 Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 27HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 18P: Wet Pond (EX) Elevation (feet) Storage (cubic-feet) 733.30 0 733.35 956 733.40 1,918 733.45 2,884 733.50 3,856 733.55 4,832 733.60 5,813 733.65 6,800 733.70 7,791 733.75 8,789 733.80 9,796 733.85 10,812 733.90 11,836 733.95 12,870 734.00 13,912 734.05 14,966 734.10 16,037 734.15 17,123 734.20 18,225 734.25 19,343 734.30 20,477 734.35 21,627 734.40 22,793 734.45 23,974 734.50 25,172 734.55 26,385 734.60 27,615 734.65 28,860 734.70 30,121 734.75 31,398 734.80 32,691 734.85 34,000 734.90 35,325 734.95 36,665 735.00 38,022 735.05 39,396 735.10 40,790 735.15 42,204 735.20 43,637 735.25 45,090 735.30 46,563 735.35 48,055 735.40 49,567 735.45 51,099 735.50 52,650 735.55 54,221 735.60 55,812 735.65 57,422 735.70 59,052 735.75 60,702 735.80 62,371 735.85 64,060 Elevation (feet) Storage (cubic-feet) 735.90 65,769 735.95 67,497 736.00 69,245 736.05 71,010 736.10 72,788 736.15 74,581 736.20 76,387 736.25 78,206 736.30 80,040 736.35 81,887 736.40 83,748 736.45 85,623 736.50 87,511 736.55 89,413 736.60 91,329 736.65 93,259 736.70 95,202 736.75 97,159 736.80 99,130 736.85 101,115 736.90 103,113 736.95 105,125 737.00 107,151 737.05 109,191 737.10 111,243 737.15 113,309 737.20 115,389 737.25 117,481 737.30 119,587 737.35 121,707 737.40 123,839 737.45 125,985 737.50 128,144 737.55 130,317 737.60 132,502 737.65 134,701 737.70 136,914 737.75 139,140 737.80 141,379 737.85 143,631 737.90 145,897 737.95 148,176 738.00 150,468 738.05 152,774 738.10 155,093 738.15 157,427 738.20 159,774 738.25 162,135 738.30 164,510 738.35 166,898 738.40 169,300 738.45 171,717 Elevation (feet) Storage (cubic-feet) 738.50 174,147 738.55 176,590 738.60 179,048 738.65 181,519 738.70 184,005 738.75 186,503 738.80 189,016 738.85 191,543 738.90 194,083 738.95 196,637 739.00 199,205 739.05 201,787 739.10 204,383 739.15 206,993 739.20 209,616 739.25 212,254 739.30 214,906 739.35 217,571 739.40 220,251 739.45 222,944 739.50 225,652 739.55 228,373 739.60 231,109 739.65 233,858 739.70 236,621 739.75 239,399 739.80 242,190 739.85 244,995 739.90 247,814 739.95 250,647 740.00 253,494 170184001 Napleton Auxiliary Lot And Detail Center Appendix C: Proposed Basin Conditions RANDALL DRIVERANDALL DRIVEMarch 15, 2021 0'80'40'NORTHNAPLETON AUTOMOTIVE GROUP PROPOSED DRAINAGE AREA MAP PROJECT: BY: DATE: Hydrologic Group % A 0.0% B 0.0% C 0.0% D 100.0% Total 100.0% Soil Group Weighted Runoff Coefficient C Actual Soil Group Next Less Impervious Soil Group Undeveloped Wooded Good Cover 0.20 77 77 Undeveloped Meadow -0.25 78 78 Fully Developed Impervious Paved 0.85 98 98 Fully Developed Impervious Rooftop 0.90 98 98 Fully Developed Open Space Good Condition (>75% Cover)0.30 80 80 Fully Developed Open Space Fair Condition (50%-75% Cover)0.35 84 84 Weighted CN Wooded - Good Cover Meadow Impervious - Paved Impervious - Rooftop Open Space - Good Condition (>75% Cover) Fully Developed - Open Space Total Actual Soil Group DA-N 0.68 2.59 0.31 1.01 -4.59 0.64 91 DA-S 2.84 0.41 0.42 -3.67 0.79 96 Napleton Automotive Group AMM 17-Mar-21 Site Soil Weighted C Cover Type Condition Basin Soil Group Weighted CN Area (ac) 30S Proposed (Ex) DA-N DA-N DA-S DA - S 27P New Wet Pond From Ex Dry Detention 31P Wet Pond (EX) 33P New Dry Pond Routing Diagram for Detention - 170184001 Prepared by Kimley-Horn, Printed 3/15/2021 HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 2HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Rainfall Events Listing (selected events) Event# Event Name Storm Type Curve Mode Duration (hours) B/B Depth (inches) AMC 1 10 Yr-24 Hrs Type II 24-hr Default 24.00 1 3.83 2 2 100 Yr-24 Hrs Type II 24-hr Default 24.00 1 6.46 2 Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 3HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Area Listing (selected nodes) Area (acres) CN Description (subcatchment-numbers) 12.080 90 (30S) 4.590 91 (DA-N) 3.670 96 (DA-S) 20.340 91 TOTAL AREA Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 4HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Soil Listing (selected nodes) Area (acres) Soil Group Subcatchment Numbers 0.000 HSG A 0.000 HSG B 0.000 HSG C 0.000 HSG D 20.340 Other 30S, DA-N, DA-S 20.340 TOTAL AREA Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 5HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Ground Covers (selected nodes) HSG-A (acres) HSG-B (acres) HSG-C (acres) HSG-D (acres) Other (acres) Total (acres) Ground Cover Subcatchment Numbers 0.000 0.000 0.000 0.000 20.340 20.340 30S, DA-N, DA-S 0.000 0.000 0.000 0.000 20.340 20.340 TOTAL AREA Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 6HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Pipe Listing (selected nodes) Line# Node Number In-Invert (feet) Out-Invert (feet) Length (feet) Slope (ft/ft) n Width (inches) Diam/Height (inches) Inside-Fill (inches) 1 27P 733.70 733.30 98.0 0.0041 0.013 0.0 18.0 0.0 2 33P 734.05 733.33 416.0 0.0017 0.013 0.0 18.0 0.0 Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 7HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=12.080 ac 0.00% Impervious Runoff Depth=2.76"Subcatchment 30S: Proposed (Ex) Tc=8.9 min CN=90 Runoff=50.76 cfs 2.777 af Runoff Area=4.590 ac 0.00% Impervious Runoff Depth=2.85"Subcatchment DA-N: DA-N Tc=7.0 min CN=91 Runoff=20.96 cfs 1.092 af Runoff Area=3.670 ac 0.00% Impervious Runoff Depth=3.37"Subcatchment DA-S: DA - S Tc=7.0 min CN=96 Runoff=18.53 cfs 1.031 af Peak Elev=736.15' Storage=44,539 cf Inflow=22.82 cfs 2.114 afPond 27P: New Wet Pond From Ex Dry 18.0" Round Culvert n=0.013 L=98.0' S=0.0041 '/' Outflow=2.88 cfs 2.111 af Peak Elev=736.14' Storage=89,796 cf Inflow=53.64 cfs 4.888 afPond 31P: Wet Pond (EX) Outflow=1.52 cfs 4.764 af Peak Elev=736.15' Storage=21,348 cf Inflow=20.96 cfs 1.092 afPond 33P: New Dry Pond 18.0" Round Culvert n=0.013 L=416.0' S=0.0017 '/' Outflow=4.84 cfs 1.083 af Total Runoff Area = 20.340 ac Runoff Volume = 4.900 af Average Runoff Depth = 2.89" 100.00% Pervious = 20.340 ac 0.00% Impervious = 0.000 ac Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 8HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 30S: Proposed (Ex) Runoff = 50.76 cfs @ 12.00 hrs, Volume= 2.777 af, Depth= 2.76" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83" Area (ac) CN Description * 12.080 90 12.080 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.9 Direct Entry, Direct Entry Subcatchment 30S: Proposed (Ex) Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420Flow (cfs)55 50 45 40 35 30 25 20 15 10 5 0 Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83" Runoff Area=12.080 ac Runoff Volume=2.777 af Runoff Depth=2.76" Tc=8.9 min CN=90 50.76 cfs Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 10HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment DA-N: DA-N Runoff = 20.96 cfs @ 11.98 hrs, Volume= 1.092 af, Depth= 2.85" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83" Area (ac) CN Description * 4.590 91 4.590 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.0 Direct Entry, Direct Entry Subcatchment DA-N: DA-N Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420Flow (cfs)23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83" Runoff Area=4.590 ac Runoff Volume=1.092 af Runoff Depth=2.85" Tc=7.0 min CN=91 20.96 cfs Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 12HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment DA-S: DA - S Runoff = 18.53 cfs @ 11.98 hrs, Volume= 1.031 af, Depth= 3.37" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83" Area (ac) CN Description * 3.670 96 3.670 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.0 Direct Entry, Direct Entry Subcatchment DA-S: DA - S Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420Flow (cfs)20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83" Runoff Area=3.670 ac Runoff Volume=1.031 af Runoff Depth=3.37" Tc=7.0 min CN=96 18.53 cfs Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 14HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Summary for Pond 27P: New Wet Pond From Ex Dry Detention [87] Warning: Oscillations may require smaller dt or Finer Routing (severity=1) [80] Warning: Exceeded Pond 33P by 0.01' @ 13.20 hrs (0.35 cfs 0.007 af) Inflow Area = 8.260 ac, 0.00% Impervious, Inflow Depth > 3.07" for 10 Yr-24 Hrs event Inflow = 22.82 cfs @ 11.98 hrs, Volume= 2.114 af Outflow = 2.88 cfs @ 12.00 hrs, Volume= 2.111 af, Atten= 87%, Lag= 0.9 min Primary = 2.88 cfs @ 12.00 hrs, Volume= 2.111 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 736.15' @ 17.18 hrs Surf.Area= 22,623 sf Storage= 44,539 cf Plug-Flow detention time= 750.5 min calculated for 2.111 af (100% of inflow) Center-of-Mass det. time= 746.9 min ( 1,852.9 - 1,106.0 ) Volume Invert Avail.Storage Storage Description #1 733.70' 153,748 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 733.70 0 0 0 734.00 16,592 2,489 2,489 735.00 19,360 17,976 20,465 736.00 22,196 20,778 41,243 737.00 25,101 23,649 64,891 738.00 28,075 26,588 91,479 739.00 31,117 29,596 121,075 740.00 34,228 32,673 153,748 Device Routing Invert Outlet Devices #1 Primary 733.70'18.0" Round Culvert L= 98.0' Ke= 0.500 Inlet / Outlet Invert= 733.70' / 733.30' S= 0.0041 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 1.77 sf Primary OutFlow Max=0.00 cfs @ 12.00 hrs HW=734.98' TW=734.98' (Dynamic Tailwater) 1=Culvert ( Controls 0.00 cfs) Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 15HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Pond 27P: New Wet Pond From Ex Dry Detention Inflow Primary Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420Flow (cfs)24 22 20 18 16 14 12 10 8 6 4 2 0 Inflow Area=8.260 ac Peak Elev=736.15' Storage=44,539 cf 18.0" Round Culvert n=0.013 L=98.0' S=0.0041 '/' 22.82 cfs 2.88 cfs Pond 27P: New Wet Pond From Ex Dry Detention Primary Stage-Discharge Discharge (cfs) 1614121086420Elevation (feet)740 739 738 737 736 735 734 Culvert Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 16HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Pond 27P: New Wet Pond From Ex Dry Detention Surface Storage Stage-Area-Storage Storage (cubic-feet) 140,000120,000100,00080,00060,00040,00020,0000 Surface/Horizontal/Wetted Area (sq-ft) 30,00025,00020,00015,00010,0005,0000 Elevation (feet)740 739 738 737 736 735 734 Custom Stage Data Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 17HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Hydrograph for Pond 27P: New Wet Pond From Ex Dry Detention Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Primary (cfs) 0.00 0.00 0 733.70 0.00 2.50 0.02 11 733.72 0.00 5.00 0.10 373 733.82 0.04 7.50 0.21 1,015 733.89 0.13 10.00 0.59 2,428 734.00 0.30 12.50 4.33 34,621 735.70 0.00 15.00 0.80 43,764 736.11 0.54 17.50 0.61 44,528 736.15 0.63 20.00 0.50 43,695 736.11 0.67 22.50 0.47 42,041 736.04 0.67 25.00 0.26 39,407 735.92 0.73 27.50 0.25 35,281 735.73 0.69 30.00 0.23 31,349 735.54 0.66 32.50 0.22 27,628 735.36 0.62 35.00 0.20 24,113 735.19 0.58 37.50 0.19 20,802 735.02 0.55 40.00 0.17 17,693 734.86 0.50 42.50 0.15 14,778 734.70 0.46 45.00 0.13 12,064 734.55 0.42 47.50 0.10 9,559 734.41 0.37 50.00 0.08 7,286 734.28 0.31 52.50 0.05 5,287 734.17 0.26 55.00 0.04 3,615 734.07 0.20 57.50 0.03 2,295 733.99 0.15 60.00 0.02 1,344 733.92 0.10 62.50 0.01 753 733.86 0.06 65.00 0.01 422 733.82 0.04 67.50 0.01 245 733.79 0.02 70.00 0.01 151 733.77 0.01 Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 18HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Stage-Discharge for Pond 27P: New Wet Pond From Ex Dry Detention Elevation (feet) Primary (cfs) 733.70 0.00 733.75 0.01 733.80 0.03 733.85 0.08 733.90 0.14 733.95 0.22 734.00 0.32 734.05 0.44 734.10 0.57 734.15 0.72 734.20 0.89 734.25 1.06 734.30 1.25 734.35 1.46 734.40 1.67 734.45 1.90 734.50 2.13 734.55 2.38 734.60 2.63 734.65 2.89 734.70 3.15 734.75 3.42 734.80 3.69 734.85 3.97 734.90 4.25 734.95 4.53 735.00 4.81 735.05 5.09 735.10 5.37 735.15 5.64 735.20 5.90 735.25 6.16 735.30 6.41 735.35 6.65 735.40 6.87 735.45 7.07 735.50 7.26 735.55 7.41 735.60 7.52 735.65 7.58 735.70 7.41 735.75 7.62 735.80 7.82 735.85 8.01 735.90 8.20 735.95 8.38 736.00 8.56 736.05 8.74 736.10 8.91 736.15 9.08 736.20 9.25 736.25 9.41 Elevation (feet) Primary (cfs) 736.30 9.57 736.35 9.73 736.40 9.89 736.45 10.04 736.50 10.19 736.55 10.34 736.60 10.49 736.65 10.63 736.70 10.77 736.75 10.91 736.80 11.05 736.85 11.19 736.90 11.33 736.95 11.46 737.00 11.59 737.05 11.72 737.10 11.85 737.15 11.98 737.20 12.11 737.25 12.23 737.30 12.36 737.35 12.48 737.40 12.60 737.45 12.72 737.50 12.84 737.55 12.96 737.60 13.08 737.65 13.19 737.70 13.31 737.75 13.42 737.80 13.54 737.85 13.65 737.90 13.76 737.95 13.87 738.00 13.98 738.05 14.09 738.10 14.20 738.15 14.31 738.20 14.41 738.25 14.52 738.30 14.62 738.35 14.73 738.40 14.83 738.45 14.93 738.50 15.03 738.55 15.14 738.60 15.24 738.65 15.34 738.70 15.43 738.75 15.53 738.80 15.63 738.85 15.73 Elevation (feet) Primary (cfs) 738.90 15.83 738.95 15.92 739.00 16.02 739.05 16.11 739.10 16.21 739.15 16.30 739.20 16.39 739.25 16.49 739.30 16.58 739.35 16.67 739.40 16.76 739.45 16.85 739.50 16.94 739.55 17.03 739.60 17.12 739.65 17.21 739.70 17.30 739.75 17.39 739.80 17.48 739.85 17.56 739.90 17.65 739.95 17.74 740.00 17.82 Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 19HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 27P: New Wet Pond From Ex Dry Detention Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 733.70 0 0 733.80 5,531 277 733.90 11,061 1,106 734.00 16,592 2,489 734.10 16,869 4,162 734.20 17,146 5,863 734.30 17,422 7,591 734.40 17,699 9,347 734.50 17,976 11,131 734.60 18,253 12,942 734.70 18,530 14,781 734.80 18,806 16,648 734.90 19,083 18,543 735.00 19,360 20,465 735.10 19,644 22,415 735.20 19,927 24,394 735.30 20,211 26,400 735.40 20,494 28,436 735.50 20,778 30,499 735.60 21,062 32,591 735.70 21,345 34,712 735.80 21,629 36,860 735.90 21,912 39,037 736.00 22,196 41,243 736.10 22,487 43,477 736.20 22,777 45,740 736.30 23,068 48,032 736.40 23,358 50,354 736.50 23,649 52,704 736.60 23,939 55,083 736.70 24,230 57,492 736.80 24,520 59,929 736.90 24,811 62,396 737.00 25,101 64,891 737.10 25,398 67,416 737.20 25,696 69,971 737.30 25,993 72,555 737.40 26,291 75,170 737.50 26,588 77,814 737.60 26,885 80,487 737.70 27,183 83,191 737.80 27,480 85,924 737.90 27,778 88,687 738.00 28,075 91,479 738.10 28,379 94,302 738.20 28,683 97,155 738.30 28,988 100,039 738.40 29,292 102,953 738.50 29,596 105,897 738.60 29,900 108,872 738.70 30,204 111,877 738.80 30,509 114,913 Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 738.90 30,813 117,979 739.00 31,117 121,075 739.10 31,428 124,203 739.20 31,739 127,361 739.30 32,050 130,550 739.40 32,361 133,771 739.50 32,673 137,023 739.60 32,984 140,305 739.70 33,295 143,619 739.80 33,606 146,964 739.90 33,917 150,341 740.00 34,228 153,748 Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 20HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Summary for Pond 31P: Wet Pond (EX) [80] Warning: Exceeded Pond 27P by 0.23' @ 12.20 hrs (3.89 cfs 0.258 af) Inflow Area = 20.340 ac, 0.00% Impervious, Inflow Depth > 2.88" for 10 Yr-24 Hrs event Inflow = 53.64 cfs @ 12.00 hrs, Volume= 4.888 af Outflow = 1.52 cfs @ 17.09 hrs, Volume= 4.764 af, Atten= 97%, Lag= 305.6 min Primary = 1.52 cfs @ 17.09 hrs, Volume= 4.764 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 736.14' @ 17.09 hrs Surf.Area= 34,369 sf Storage= 89,796 cf Plug-Flow detention time= 788.3 min calculated for 4.761 af (97% of inflow) Center-of-Mass det. time= 729.6 min ( 1,984.3 - 1,254.6 ) Volume Invert Avail.Storage Storage Description #1 733.30' 281,183 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 733.30 28,958 0 0 734.00 30,212 20,710 20,710 735.00 32,119 31,166 51,875 737.00 36,064 68,183 120,058 738.00 38,102 37,083 157,141 739.00 40,183 39,143 196,284 740.00 42,308 41,246 237,529 741.00 45,000 43,654 281,183 Device Routing Invert Outlet Devices #1 Primary 733.30'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #2 Primary 736.85'8.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Primary 739.22'48.0" x 48.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=1.52 cfs @ 17.09 hrs HW=736.14' (Free Discharge) 1=Orifice/Grate (Orifice Controls 1.52 cfs @ 7.75 fps) 2=Orifice/Grate ( Controls 0.00 cfs) 3=Orifice/Grate ( Controls 0.00 cfs) Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 21HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Pond 31P: Wet Pond (EX) Inflow Primary Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420Flow (cfs)60 55 50 45 40 35 30 25 20 15 10 5 0 Inflow Area=20.340 ac Peak Elev=736.14' Storage=89,796 cf 53.64 cfs 1.52 cfs Pond 31P: Wet Pond (EX) Primary Stage-Discharge Discharge (cfs) 1009080706050403020100Elevation (feet)741 740 739 738 737 736 735 734 Orifice/Grate Orifice/Grate Orifice/Grate Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 22HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Pond 31P: Wet Pond (EX) Surface Storage Stage-Area-Storage Storage (cubic-feet) 280,000260,000240,000220,000200,000180,000160,000140,000120,000100,00080,00060,00040,00020,0000 Surface/Horizontal/Wetted Area (sq-ft) 45,00040,00035,00030,00025,00020,00015,00010,0005,0000 Elevation (feet)741 740 739 738 737 736 735 734 Custom Stage Data Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 23HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Hydrograph for Pond 31P: Wet Pond (EX) Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Primary (cfs) 0.00 0.00 0 733.30 0.00 2.50 0.00 1 733.30 0.00 5.00 0.06 170 733.31 0.00 7.50 0.38 2,041 733.37 0.02 10.00 1.17 7,722 733.56 0.18 12.50 5.01 79,309 735.83 1.43 15.00 1.88 88,739 736.11 1.51 17.50 1.48 89,770 736.14 1.52 20.00 1.25 88,437 736.10 1.51 22.50 1.19 85,900 736.03 1.49 25.00 0.73 81,727 735.90 1.45 27.50 0.69 75,344 735.72 1.39 30.00 0.66 69,186 735.53 1.33 32.50 0.62 63,236 735.35 1.27 35.00 0.58 57,517 735.17 1.21 37.50 0.55 52,038 735.01 1.14 40.00 0.50 46,797 734.84 1.07 42.50 0.46 41,782 734.68 1.01 45.00 0.42 36,991 734.53 0.94 47.50 0.37 32,419 734.38 0.86 50.00 0.31 28,060 734.24 0.79 52.50 0.26 23,923 734.11 0.70 55.00 0.20 20,039 733.98 0.62 57.50 0.15 16,484 733.86 0.53 60.00 0.10 13,324 733.75 0.43 62.50 0.06 10,706 733.67 0.32 65.00 0.04 8,716 733.60 0.23 67.50 0.02 7,227 733.55 0.16 70.00 0.01 6,107 733.51 0.12 Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 24HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Stage-Discharge for Pond 31P: Wet Pond (EX) Elevation (feet) Primary (cfs) 733.30 0.00 733.35 0.01 733.40 0.03 733.45 0.07 733.50 0.11 733.55 0.17 733.60 0.23 733.65 0.30 733.70 0.36 733.75 0.43 733.80 0.47 733.85 0.52 733.90 0.56 733.95 0.60 734.00 0.63 734.05 0.67 734.10 0.70 734.15 0.73 734.20 0.76 734.25 0.79 734.30 0.82 734.35 0.85 734.40 0.87 734.45 0.90 734.50 0.92 734.55 0.95 734.60 0.97 734.65 0.99 734.70 1.01 734.75 1.04 734.80 1.06 734.85 1.08 734.90 1.10 734.95 1.12 735.00 1.14 735.05 1.16 735.10 1.18 735.15 1.20 735.20 1.21 735.25 1.23 735.30 1.25 735.35 1.27 735.40 1.29 735.45 1.30 735.50 1.32 735.55 1.34 735.60 1.35 735.65 1.37 735.70 1.39 735.75 1.40 735.80 1.42 735.85 1.43 Elevation (feet) Primary (cfs) 735.90 1.45 735.95 1.46 736.00 1.48 736.05 1.49 736.10 1.51 736.15 1.52 736.20 1.54 736.25 1.55 736.30 1.57 736.35 1.58 736.40 1.60 736.45 1.61 736.50 1.62 736.55 1.64 736.60 1.65 736.65 1.66 736.70 1.68 736.75 1.69 736.80 1.70 736.85 1.72 736.90 1.74 736.95 1.78 737.00 1.83 737.05 1.90 737.10 1.98 737.15 2.08 737.20 2.18 737.25 2.29 737.30 2.40 737.35 2.52 737.40 2.63 737.45 2.74 737.50 2.83 737.55 2.91 737.60 2.99 737.65 3.06 737.70 3.13 737.75 3.20 737.80 3.27 737.85 3.33 737.90 3.39 737.95 3.45 738.00 3.51 738.05 3.57 738.10 3.63 738.15 3.68 738.20 3.73 738.25 3.79 738.30 3.84 738.35 3.89 738.40 3.94 738.45 3.98 Elevation (feet) Primary (cfs) 738.50 4.03 738.55 4.08 738.60 4.13 738.65 4.17 738.70 4.22 738.75 4.26 738.80 4.30 738.85 4.35 738.90 4.39 738.95 4.43 739.00 4.47 739.05 4.51 739.10 4.55 739.15 4.59 739.20 4.63 739.25 4.95 739.30 5.90 739.35 7.20 739.40 8.78 739.45 10.60 739.50 12.62 739.55 14.82 739.60 17.19 739.65 19.73 739.70 22.41 739.75 25.23 739.80 28.19 739.85 31.28 739.90 34.49 739.95 37.82 740.00 41.26 740.05 44.82 740.10 48.48 740.15 52.25 740.20 56.12 740.25 60.08 740.30 64.15 740.35 68.30 740.40 72.55 740.45 76.89 740.50 81.32 740.55 85.84 740.60 90.43 740.65 95.12 740.70 99.40 740.75 101.00 740.80 102.58 740.85 104.13 740.90 105.66 740.95 107.16 741.00 108.65 Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 25HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 31P: Wet Pond (EX) Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 733.30 28,958 0 733.40 29,137 2,905 733.50 29,316 5,827 733.60 29,495 8,768 733.70 29,675 11,727 733.80 29,854 14,703 733.90 30,033 17,697 734.00 30,212 20,710 734.10 30,403 23,740 734.20 30,593 26,790 734.30 30,784 29,859 734.40 30,975 32,947 734.50 31,166 36,054 734.60 31,356 39,180 734.70 31,547 42,325 734.80 31,738 45,489 734.90 31,928 48,673 735.00 32,119 51,875 735.10 32,316 55,097 735.20 32,513 58,338 735.30 32,711 61,599 735.40 32,908 64,880 735.50 33,105 68,181 735.60 33,302 71,501 735.70 33,500 74,842 735.80 33,697 78,201 735.90 33,894 81,581 736.00 34,092 84,980 736.10 34,289 88,399 736.20 34,486 91,838 736.30 34,683 95,296 736.40 34,880 98,775 736.50 35,078 102,273 736.60 35,275 105,790 736.70 35,472 109,328 736.80 35,669 112,885 736.90 35,867 116,461 737.00 36,064 120,058 737.10 36,268 123,675 737.20 36,472 127,312 737.30 36,675 130,969 737.40 36,879 134,647 737.50 37,083 138,345 737.60 37,287 142,063 737.70 37,491 145,802 737.80 37,694 149,561 737.90 37,898 153,341 738.00 38,102 157,141 738.10 38,310 160,962 738.20 38,518 164,803 738.30 38,726 168,665 738.40 38,934 172,548 Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 738.50 39,143 176,452 738.60 39,351 180,377 738.70 39,559 184,322 738.80 39,767 188,289 738.90 39,975 192,276 739.00 40,183 196,284 739.10 40,395 200,312 739.20 40,608 204,363 739.30 40,820 208,434 739.40 41,033 212,527 739.50 41,246 216,641 739.60 41,458 220,776 739.70 41,670 224,932 739.80 41,883 229,110 739.90 42,095 233,309 740.00 42,308 237,529 740.10 42,577 241,773 740.20 42,846 246,044 740.30 43,116 250,343 740.40 43,385 254,668 740.50 43,654 259,020 740.60 43,923 263,398 740.70 44,192 267,804 740.80 44,462 272,237 740.90 44,731 276,696 741.00 45,000 281,183 Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 26HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Summary for Pond 33P: New Dry Pond Inflow Area = 4.590 ac, 0.00% Impervious, Inflow Depth = 2.85" for 10 Yr-24 Hrs event Inflow = 20.96 cfs @ 11.98 hrs, Volume= 1.092 af Outflow = 4.84 cfs @ 12.05 hrs, Volume= 1.083 af, Atten= 77%, Lag= 4.3 min Primary = 4.84 cfs @ 12.05 hrs, Volume= 1.083 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 736.15' @ 17.20 hrs Surf.Area= 12,626 sf Storage= 21,348 cf Plug-Flow detention time= 641.2 min calculated for 1.083 af (99% of inflow) Center-of-Mass det. time= 635.7 min ( 1,429.4 - 793.7 ) Volume Invert Avail.Storage Storage Description #1 734.05' 154,655 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 734.05 6,657 0 0 735.00 10,390 8,097 8,097 736.00 12,313 11,352 19,449 737.00 14,365 13,339 32,788 738.00 16,544 15,455 48,242 739.00 18,851 17,698 65,940 740.00 21,287 20,069 86,009 743.00 24,477 68,646 154,655 Device Routing Invert Outlet Devices #1 Primary 734.05'18.0" Round Culvert L= 416.0' Ke= 0.500 Inlet / Outlet Invert= 734.05' / 733.33' S= 0.0017 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 1.77 sf Primary OutFlow Max=4.42 cfs @ 12.05 hrs HW=735.93' TW=735.14' (Dynamic Tailwater) 1=Culvert (Outlet Controls 4.42 cfs @ 2.56 fps) Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 27HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Pond 33P: New Dry Pond Inflow Primary Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420Flow (cfs)23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=4.590 ac Peak Elev=736.15' Storage=21,348 cf 18.0" Round Culvert n=0.013 L=416.0' S=0.0017 '/' 20.96 cfs 4.84 cfs Pond 33P: New Dry Pond Primary Stage-Discharge Discharge (cfs) 131211109876543210Elevation (feet)743 742 741 740 739 738 737 736 735 Culvert Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 28HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Pond 33P: New Dry Pond Surface Storage Stage-Area-Storage Storage (cubic-feet) 140,000120,000100,00080,00060,00040,00020,0000 Surface/Horizontal/Wetted Area (sq-ft) 24,00022,00020,00018,00016,00014,00012,00010,0008,0006,0004,0002,0000 Elevation (feet)743 742 741 740 739 738 737 736 735 Custom Stage Data Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 29HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Hydrograph for Pond 33P: New Dry Pond Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Primary (cfs) 0.00 0.00 0 734.05 0.00 2.50 0.00 0 734.05 0.00 5.00 0.02 22 734.05 0.00 7.50 0.12 604 734.14 0.01 10.00 0.37 2,112 734.34 0.14 12.50 1.83 19,089 735.97 2.78 15.00 0.51 20,901 736.12 0.37 17.50 0.33 21,343 736.15 0.34 20.00 0.22 20,885 736.12 0.31 22.50 0.20 19,962 736.04 0.31 25.00 0.00 18,512 735.92 0.26 27.50 0.00 16,232 735.73 0.25 30.00 0.00 14,074 735.55 0.23 32.50 0.00 12,049 735.37 0.22 35.00 0.00 10,152 735.19 0.20 37.50 0.00 8,386 735.03 0.19 40.00 0.00 6,768 734.87 0.17 42.50 0.00 5,334 734.72 0.15 45.00 0.00 4,098 734.58 0.13 47.50 0.00 3,079 734.46 0.10 50.00 0.00 2,287 734.36 0.08 52.50 0.00 1,709 734.29 0.05 55.00 0.00 1,305 734.24 0.04 57.50 0.00 1,027 734.20 0.03 60.00 0.00 832 734.17 0.02 62.50 0.00 691 734.15 0.01 65.00 0.00 587 734.14 0.01 67.50 0.00 509 734.12 0.01 70.00 0.00 449 734.12 0.01 Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 30HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Stage-Discharge for Pond 33P: New Dry Pond Elevation (feet) Primary (cfs) 734.05 0.00 734.10 0.00 734.15 0.02 734.20 0.04 734.25 0.08 734.30 0.13 734.35 0.20 734.40 0.28 734.45 0.38 734.50 0.49 734.55 0.62 734.60 0.75 734.65 0.89 734.70 1.04 734.75 1.20 734.80 1.37 734.85 1.54 734.90 1.73 734.95 1.92 735.00 2.11 735.05 2.31 735.10 2.52 735.15 2.73 735.20 2.94 735.25 3.15 735.30 3.36 735.35 3.57 735.40 3.78 735.45 3.99 735.50 4.19 735.55 4.38 735.60 4.57 735.65 4.75 735.70 4.91 735.75 5.06 735.80 5.19 735.85 5.30 735.90 5.39 735.95 5.43 736.00 5.42 736.05 5.19 736.10 5.30 736.15 5.40 736.20 5.50 736.25 5.60 736.30 5.70 736.35 5.79 736.40 5.89 736.45 5.98 736.50 6.07 736.55 6.16 736.60 6.25 Elevation (feet) Primary (cfs) 736.65 6.34 736.70 6.43 736.75 6.51 736.80 6.60 736.85 6.68 736.90 6.76 736.95 6.84 737.00 6.92 737.05 7.00 737.10 7.08 737.15 7.16 737.20 7.23 737.25 7.31 737.30 7.39 737.35 7.46 737.40 7.53 737.45 7.61 737.50 7.68 737.55 7.75 737.60 7.82 737.65 7.89 737.70 7.96 737.75 8.03 737.80 8.10 737.85 8.17 737.90 8.23 737.95 8.30 738.00 8.37 738.05 8.43 738.10 8.50 738.15 8.56 738.20 8.63 738.25 8.69 738.30 8.75 738.35 8.82 738.40 8.88 738.45 8.94 738.50 9.00 738.55 9.06 738.60 9.12 738.65 9.18 738.70 9.24 738.75 9.30 738.80 9.36 738.85 9.42 738.90 9.48 738.95 9.54 739.00 9.60 739.05 9.65 739.10 9.71 739.15 9.77 739.20 9.82 Elevation (feet) Primary (cfs) 739.25 9.88 739.30 9.93 739.35 9.99 739.40 10.05 739.45 10.10 739.50 10.15 739.55 10.21 739.60 10.26 739.65 10.32 739.70 10.37 739.75 10.42 739.80 10.48 739.85 10.53 739.90 10.58 739.95 10.63 740.00 10.68 740.05 10.74 740.10 10.79 740.15 10.84 740.20 10.89 740.25 10.94 740.30 10.99 740.35 11.04 740.40 11.09 740.45 11.14 740.50 11.19 740.55 11.24 740.60 11.29 740.65 11.34 740.70 11.38 740.75 11.43 740.80 11.48 740.85 11.53 740.90 11.58 740.95 11.62 741.00 11.67 741.05 11.72 741.10 11.77 741.15 11.81 741.20 11.86 741.25 11.91 741.30 11.95 741.35 12.00 741.40 12.04 741.45 12.09 741.50 12.14 741.55 12.18 741.60 12.23 741.65 12.27 741.70 12.32 741.75 12.36 741.80 12.41 Elevation (feet) Primary (cfs) 741.85 12.45 741.90 12.49 741.95 12.54 742.00 12.58 742.05 12.63 742.10 12.67 742.15 12.71 742.20 12.76 742.25 12.80 742.30 12.84 742.35 12.89 742.40 12.93 742.45 12.97 742.50 13.01 742.55 13.06 742.60 13.10 742.65 13.14 742.70 13.18 742.75 13.22 742.80 13.27 742.85 13.31 742.90 13.35 742.95 13.39 743.00 13.43 Type II 24-hr 10 Yr-24 Hrs Rainfall=3.83"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 31HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 33P: New Dry Pond Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 734.05 6,657 0 734.15 7,050 685 734.25 7,443 1,410 734.35 7,836 2,174 734.45 8,229 2,977 734.55 8,622 3,820 734.65 9,015 4,702 734.75 9,408 5,623 734.85 9,801 6,583 734.95 10,194 7,583 735.05 10,486 8,619 735.15 10,678 9,677 735.25 10,871 10,755 735.35 11,063 11,852 735.45 11,255 12,968 735.55 11,448 14,103 735.65 11,640 15,257 735.75 11,832 16,431 735.85 12,025 17,624 735.95 12,217 18,836 736.05 12,416 20,067 736.15 12,621 21,319 736.25 12,826 22,591 736.35 13,031 23,884 736.45 13,236 25,197 736.55 13,442 26,531 736.65 13,647 27,886 736.75 13,852 29,261 736.85 14,057 30,656 736.95 14,262 32,072 737.05 14,474 33,509 737.15 14,692 34,967 737.25 14,910 36,447 737.35 15,128 37,949 737.45 15,346 39,473 737.55 15,563 41,018 737.65 15,781 42,585 737.75 15,999 44,174 737.85 16,217 45,785 737.95 16,435 47,418 738.05 16,659 49,072 738.15 16,890 50,750 738.25 17,121 52,450 738.35 17,351 54,174 738.45 17,582 55,921 738.55 17,813 57,690 738.65 18,044 59,483 738.75 18,274 61,299 738.85 18,505 63,138 738.95 18,736 65,000 739.05 18,973 66,885 739.15 19,216 68,795 Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 739.25 19,460 70,729 739.35 19,704 72,687 739.45 19,947 74,669 739.55 20,191 76,676 739.65 20,434 78,708 739.75 20,678 80,763 739.85 20,922 82,843 739.95 21,165 84,948 740.05 21,340 87,075 740.15 21,446 89,214 740.25 21,553 91,364 740.35 21,659 93,524 740.45 21,765 95,696 740.55 21,872 97,878 740.65 21,978 100,070 740.75 22,085 102,273 740.85 22,191 104,487 740.95 22,297 106,711 741.05 22,403 108,946 741.15 22,510 111,192 741.25 22,616 113,448 741.35 22,722 115,715 741.45 22,829 117,993 741.55 22,935 120,281 741.65 23,041 122,580 741.75 23,148 124,889 741.85 23,254 127,209 741.95 23,360 129,540 742.05 23,467 131,882 742.15 23,573 134,234 742.25 23,680 136,596 742.35 23,786 138,969 742.45 23,892 141,353 742.55 23,998 143,748 742.65 24,105 146,153 742.75 24,211 148,569 742.85 24,317 150,995 742.95 24,424 153,432 Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 32HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=12.080 ac 0.00% Impervious Runoff Depth=5.29"Subcatchment 30S: Proposed (Ex) Tc=8.9 min CN=90 Runoff=93.74 cfs 5.330 af Runoff Area=4.590 ac 0.00% Impervious Runoff Depth=5.41"Subcatchment DA-N: DA-N Tc=7.0 min CN=91 Runoff=38.10 cfs 2.069 af Runoff Area=3.670 ac 0.00% Impervious Runoff Depth=5.99"Subcatchment DA-S: DA - S Tc=7.0 min CN=96 Runoff=31.86 cfs 1.831 af Peak Elev=737.86' Storage=87,451 cf Inflow=36.80 cfs 3.869 afPond 27P: New Wet Pond From Ex Dry 18.0" Round Culvert n=0.013 L=98.0' S=0.0041 '/' Outflow=1.48 cfs 3.786 af Peak Elev=738.06' Storage=159,499 cf Inflow=93.74 cfs 9.116 afPond 31P: Wet Pond (EX) Outflow=3.58 cfs 8.657 af Peak Elev=737.87' Storage=46,124 cf Inflow=38.10 cfs 2.069 afPond 33P: New Dry Pond 18.0" Round Culvert n=0.013 L=416.0' S=0.0017 '/' Outflow=5.14 cfs 2.039 af Total Runoff Area = 20.340 ac Runoff Volume = 9.229 af Average Runoff Depth = 5.44" 100.00% Pervious = 20.340 ac 0.00% Impervious = 0.000 ac Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 33HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 30S: Proposed (Ex) Runoff = 93.74 cfs @ 12.00 hrs, Volume= 5.330 af, Depth= 5.29" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46" Area (ac) CN Description * 12.080 90 12.080 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.9 Direct Entry, Direct Entry Subcatchment 30S: Proposed (Ex) Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420Flow (cfs)100 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46" Runoff Area=12.080 ac Runoff Volume=5.330 af Runoff Depth=5.29" Tc=8.9 min CN=90 93.74 cfs Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 35HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment DA-N: DA-N Runoff = 38.10 cfs @ 11.98 hrs, Volume= 2.069 af, Depth= 5.41" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46" Area (ac) CN Description * 4.590 91 4.590 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.0 Direct Entry, Direct Entry Subcatchment DA-N: DA-N Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420Flow (cfs)42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46" Runoff Area=4.590 ac Runoff Volume=2.069 af Runoff Depth=5.41" Tc=7.0 min CN=91 38.10 cfs Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 37HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment DA-S: DA - S Runoff = 31.86 cfs @ 11.98 hrs, Volume= 1.831 af, Depth= 5.99" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46" Area (ac) CN Description * 3.670 96 3.670 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.0 Direct Entry, Direct Entry Subcatchment DA-S: DA - S Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420Flow (cfs)34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46" Runoff Area=3.670 ac Runoff Volume=1.831 af Runoff Depth=5.99" Tc=7.0 min CN=96 31.86 cfs Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 39HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Summary for Pond 27P: New Wet Pond From Ex Dry Detention [87] Warning: Oscillations may require smaller dt or Finer Routing (severity=1) Inflow Area = 8.260 ac, 0.00% Impervious, Inflow Depth > 5.62" for 100 Yr-24 Hrs event Inflow = 36.80 cfs @ 11.98 hrs, Volume= 3.869 af Outflow = 1.48 cfs @ 11.83 hrs, Volume= 3.786 af, Atten= 96%, Lag= 0.0 min Primary = 1.48 cfs @ 11.83 hrs, Volume= 3.786 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 737.86' @ 16.08 hrs Surf.Area= 27,645 sf Storage= 87,451 cf Plug-Flow detention time= 936.2 min calculated for 3.786 af (98% of inflow) Center-of-Mass det. time= 877.1 min ( 2,073.2 - 1,196.2 ) Volume Invert Avail.Storage Storage Description #1 733.70' 153,748 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 733.70 0 0 0 734.00 16,592 2,489 2,489 735.00 19,360 17,976 20,465 736.00 22,196 20,778 41,243 737.00 25,101 23,649 64,891 738.00 28,075 26,588 91,479 739.00 31,117 29,596 121,075 740.00 34,228 32,673 153,748 Device Routing Invert Outlet Devices #1 Primary 733.70'18.0" Round Culvert L= 98.0' Ke= 0.500 Inlet / Outlet Invert= 733.70' / 733.30' S= 0.0041 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 1.77 sf Primary OutFlow Max=0.00 cfs @ 11.83 hrs HW=735.17' TW=735.32' (Dynamic Tailwater) 1=Culvert ( Controls 0.00 cfs) Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 40HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Pond 27P: New Wet Pond From Ex Dry Detention Inflow Primary Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420Flow (cfs)40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Inflow Area=8.260 ac Peak Elev=737.86' Storage=87,451 cf 18.0" Round Culvert n=0.013 L=98.0' S=0.0041 '/' 36.80 cfs 1.48 cfs Pond 27P: New Wet Pond From Ex Dry Detention Primary Stage-Discharge Discharge (cfs) 1614121086420Elevation (feet)740 739 738 737 736 735 734 Culvert Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 41HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Pond 27P: New Wet Pond From Ex Dry Detention Surface Storage Stage-Area-Storage Storage (cubic-feet) 140,000120,000100,00080,00060,00040,00020,0000 Surface/Horizontal/Wetted Area (sq-ft) 30,00025,00020,00015,00010,0005,0000 Elevation (feet)740 739 738 737 736 735 734 Custom Stage Data Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 42HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Hydrograph for Pond 27P: New Wet Pond From Ex Dry Detention Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Primary (cfs) 0.00 0.00 0 733.70 0.00 2.50 0.10 182 733.78 0.02 5.00 0.26 1,095 733.90 0.14 7.50 0.56 2,613 734.01 0.32 10.00 1.36 6,421 734.23 0.68 12.50 6.29 63,724 736.95 0.00 15.00 1.03 84,176 737.74 0.00 17.50 1.17 86,665 737.83 1.41 20.00 0.98 83,496 737.71 1.44 22.50 0.90 79,313 737.56 1.35 25.00 0.49 74,070 737.36 1.33 27.50 0.38 67,394 737.10 1.04 30.00 0.33 61,936 736.88 0.90 32.50 0.31 56,885 736.67 0.86 35.00 0.30 52,023 736.47 0.83 37.50 0.29 47,352 736.27 0.79 40.00 0.27 42,874 736.07 0.76 42.50 0.26 38,592 735.88 0.72 45.00 0.25 34,502 735.69 0.69 47.50 0.23 30,612 735.51 0.65 50.00 0.22 26,931 735.33 0.61 52.50 0.20 23,455 735.15 0.58 55.00 0.19 20,185 734.99 0.54 57.50 0.17 17,113 734.82 0.50 60.00 0.14 14,237 734.67 0.45 62.50 0.12 11,562 734.52 0.41 65.00 0.10 9,099 734.39 0.36 67.50 0.07 6,876 734.26 0.30 70.00 0.05 4,936 734.15 0.25 Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 43HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Stage-Discharge for Pond 27P: New Wet Pond From Ex Dry Detention Elevation (feet) Primary (cfs) 733.70 0.00 733.75 0.01 733.80 0.03 733.85 0.08 733.90 0.14 733.95 0.22 734.00 0.32 734.05 0.44 734.10 0.57 734.15 0.72 734.20 0.89 734.25 1.06 734.30 1.25 734.35 1.46 734.40 1.67 734.45 1.90 734.50 2.13 734.55 2.38 734.60 2.63 734.65 2.89 734.70 3.15 734.75 3.42 734.80 3.69 734.85 3.97 734.90 4.25 734.95 4.53 735.00 4.81 735.05 5.09 735.10 5.37 735.15 5.64 735.20 5.90 735.25 6.16 735.30 6.41 735.35 6.65 735.40 6.87 735.45 7.07 735.50 7.26 735.55 7.41 735.60 7.52 735.65 7.58 735.70 7.41 735.75 7.62 735.80 7.82 735.85 8.01 735.90 8.20 735.95 8.38 736.00 8.56 736.05 8.74 736.10 8.91 736.15 9.08 736.20 9.25 736.25 9.41 Elevation (feet) Primary (cfs) 736.30 9.57 736.35 9.73 736.40 9.89 736.45 10.04 736.50 10.19 736.55 10.34 736.60 10.49 736.65 10.63 736.70 10.77 736.75 10.91 736.80 11.05 736.85 11.19 736.90 11.33 736.95 11.46 737.00 11.59 737.05 11.72 737.10 11.85 737.15 11.98 737.20 12.11 737.25 12.23 737.30 12.36 737.35 12.48 737.40 12.60 737.45 12.72 737.50 12.84 737.55 12.96 737.60 13.08 737.65 13.19 737.70 13.31 737.75 13.42 737.80 13.54 737.85 13.65 737.90 13.76 737.95 13.87 738.00 13.98 738.05 14.09 738.10 14.20 738.15 14.31 738.20 14.41 738.25 14.52 738.30 14.62 738.35 14.73 738.40 14.83 738.45 14.93 738.50 15.03 738.55 15.14 738.60 15.24 738.65 15.34 738.70 15.43 738.75 15.53 738.80 15.63 738.85 15.73 Elevation (feet) Primary (cfs) 738.90 15.83 738.95 15.92 739.00 16.02 739.05 16.11 739.10 16.21 739.15 16.30 739.20 16.39 739.25 16.49 739.30 16.58 739.35 16.67 739.40 16.76 739.45 16.85 739.50 16.94 739.55 17.03 739.60 17.12 739.65 17.21 739.70 17.30 739.75 17.39 739.80 17.48 739.85 17.56 739.90 17.65 739.95 17.74 740.00 17.82 Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 44HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 27P: New Wet Pond From Ex Dry Detention Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 733.70 0 0 733.80 5,531 277 733.90 11,061 1,106 734.00 16,592 2,489 734.10 16,869 4,162 734.20 17,146 5,863 734.30 17,422 7,591 734.40 17,699 9,347 734.50 17,976 11,131 734.60 18,253 12,942 734.70 18,530 14,781 734.80 18,806 16,648 734.90 19,083 18,543 735.00 19,360 20,465 735.10 19,644 22,415 735.20 19,927 24,394 735.30 20,211 26,400 735.40 20,494 28,436 735.50 20,778 30,499 735.60 21,062 32,591 735.70 21,345 34,712 735.80 21,629 36,860 735.90 21,912 39,037 736.00 22,196 41,243 736.10 22,487 43,477 736.20 22,777 45,740 736.30 23,068 48,032 736.40 23,358 50,354 736.50 23,649 52,704 736.60 23,939 55,083 736.70 24,230 57,492 736.80 24,520 59,929 736.90 24,811 62,396 737.00 25,101 64,891 737.10 25,398 67,416 737.20 25,696 69,971 737.30 25,993 72,555 737.40 26,291 75,170 737.50 26,588 77,814 737.60 26,885 80,487 737.70 27,183 83,191 737.80 27,480 85,924 737.90 27,778 88,687 738.00 28,075 91,479 738.10 28,379 94,302 738.20 28,683 97,155 738.30 28,988 100,039 738.40 29,292 102,953 738.50 29,596 105,897 738.60 29,900 108,872 738.70 30,204 111,877 738.80 30,509 114,913 Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 738.90 30,813 117,979 739.00 31,117 121,075 739.10 31,428 124,203 739.20 31,739 127,361 739.30 32,050 130,550 739.40 32,361 133,771 739.50 32,673 137,023 739.60 32,984 140,305 739.70 33,295 143,619 739.80 33,606 146,964 739.90 33,917 150,341 740.00 34,228 153,748 Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 45HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Summary for Pond 31P: Wet Pond (EX) [80] Warning: Exceeded Pond 27P by 0.99' @ 12.25 hrs (7.78 cfs 1.758 af) Inflow Area = 20.340 ac, 0.00% Impervious, Inflow Depth > 5.38" for 100 Yr-24 Hrs event Inflow = 93.74 cfs @ 12.00 hrs, Volume= 9.116 af Outflow = 3.58 cfs @ 13.64 hrs, Volume= 8.657 af, Atten= 96%, Lag= 98.7 min Primary = 3.58 cfs @ 13.64 hrs, Volume= 8.657 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 738.06' @ 13.64 hrs Surf.Area= 38,231 sf Storage= 159,499 cf Plug-Flow detention time= 809.8 min calculated for 8.651 af (95% of inflow) Center-of-Mass det. time= 678.2 min ( 1,996.4 - 1,318.1 ) Volume Invert Avail.Storage Storage Description #1 733.30' 281,183 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 733.30 28,958 0 0 734.00 30,212 20,710 20,710 735.00 32,119 31,166 51,875 737.00 36,064 68,183 120,058 738.00 38,102 37,083 157,141 739.00 40,183 39,143 196,284 740.00 42,308 41,246 237,529 741.00 45,000 43,654 281,183 Device Routing Invert Outlet Devices #1 Primary 733.30'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #2 Primary 736.85'8.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Primary 739.22'48.0" x 48.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=3.58 cfs @ 13.64 hrs HW=738.06' (Free Discharge) 1=Orifice/Grate (Orifice Controls 2.01 cfs @ 10.23 fps) 2=Orifice/Grate (Orifice Controls 1.58 cfs @ 4.51 fps) 3=Orifice/Grate ( Controls 0.00 cfs) Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 46HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Pond 31P: Wet Pond (EX) Inflow Primary Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420Flow (cfs)100 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 Inflow Area=20.340 ac Peak Elev=738.06' Storage=159,499 cf 93.74 cfs 3.58 cfs Pond 31P: Wet Pond (EX) Primary Stage-Discharge Discharge (cfs) 1009080706050403020100Elevation (feet)741 740 739 738 737 736 735 734 Orifice/Grate Orifice/Grate Orifice/Grate Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 47HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Pond 31P: Wet Pond (EX) Surface Storage Stage-Area-Storage Storage (cubic-feet) 280,000260,000240,000220,000200,000180,000160,000140,000120,000100,00080,00060,00040,00020,0000 Surface/Horizontal/Wetted Area (sq-ft) 45,00040,00035,00030,00025,00020,00015,00010,0005,0000 Elevation (feet)741 740 739 738 737 736 735 734 Custom Stage Data Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 48HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Hydrograph for Pond 31P: Wet Pond (EX) Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Primary (cfs) 0.00 0.00 0 733.30 0.00 2.50 0.02 30 733.30 0.00 5.00 0.45 1,682 733.36 0.01 7.50 1.14 8,037 733.58 0.20 10.00 2.76 20,655 734.00 0.63 12.50 8.94 152,479 737.88 3.37 15.00 2.36 155,929 737.97 3.48 17.50 2.91 149,285 737.79 3.26 20.00 2.46 144,840 737.67 3.10 22.50 2.26 139,214 737.52 2.86 25.00 1.33 131,830 737.32 2.46 27.50 1.04 122,835 737.08 1.95 30.00 0.90 115,172 736.86 1.72 32.50 0.86 107,860 736.66 1.67 35.00 0.83 100,726 736.46 1.61 37.50 0.79 93,778 736.26 1.56 40.00 0.76 87,024 736.06 1.50 42.50 0.72 80,474 735.87 1.44 45.00 0.69 74,135 735.68 1.38 47.50 0.65 68,015 735.49 1.32 50.00 0.61 62,110 735.32 1.26 52.50 0.58 56,437 735.14 1.19 55.00 0.54 51,005 734.97 1.13 57.50 0.50 45,808 734.81 1.06 60.00 0.45 40,836 734.65 0.99 62.50 0.41 36,088 734.50 0.92 65.00 0.36 31,558 734.36 0.85 67.50 0.30 27,240 734.21 0.77 70.00 0.25 23,149 734.08 0.69 Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 49HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Stage-Discharge for Pond 31P: Wet Pond (EX) Elevation (feet) Primary (cfs) 733.30 0.00 733.35 0.01 733.40 0.03 733.45 0.07 733.50 0.11 733.55 0.17 733.60 0.23 733.65 0.30 733.70 0.36 733.75 0.43 733.80 0.47 733.85 0.52 733.90 0.56 733.95 0.60 734.00 0.63 734.05 0.67 734.10 0.70 734.15 0.73 734.20 0.76 734.25 0.79 734.30 0.82 734.35 0.85 734.40 0.87 734.45 0.90 734.50 0.92 734.55 0.95 734.60 0.97 734.65 0.99 734.70 1.01 734.75 1.04 734.80 1.06 734.85 1.08 734.90 1.10 734.95 1.12 735.00 1.14 735.05 1.16 735.10 1.18 735.15 1.20 735.20 1.21 735.25 1.23 735.30 1.25 735.35 1.27 735.40 1.29 735.45 1.30 735.50 1.32 735.55 1.34 735.60 1.35 735.65 1.37 735.70 1.39 735.75 1.40 735.80 1.42 735.85 1.43 Elevation (feet) Primary (cfs) 735.90 1.45 735.95 1.46 736.00 1.48 736.05 1.49 736.10 1.51 736.15 1.52 736.20 1.54 736.25 1.55 736.30 1.57 736.35 1.58 736.40 1.60 736.45 1.61 736.50 1.62 736.55 1.64 736.60 1.65 736.65 1.66 736.70 1.68 736.75 1.69 736.80 1.70 736.85 1.72 736.90 1.74 736.95 1.78 737.00 1.83 737.05 1.90 737.10 1.98 737.15 2.08 737.20 2.18 737.25 2.29 737.30 2.40 737.35 2.52 737.40 2.63 737.45 2.74 737.50 2.83 737.55 2.91 737.60 2.99 737.65 3.06 737.70 3.13 737.75 3.20 737.80 3.27 737.85 3.33 737.90 3.39 737.95 3.45 738.00 3.51 738.05 3.57 738.10 3.63 738.15 3.68 738.20 3.73 738.25 3.79 738.30 3.84 738.35 3.89 738.40 3.94 738.45 3.98 Elevation (feet) Primary (cfs) 738.50 4.03 738.55 4.08 738.60 4.13 738.65 4.17 738.70 4.22 738.75 4.26 738.80 4.30 738.85 4.35 738.90 4.39 738.95 4.43 739.00 4.47 739.05 4.51 739.10 4.55 739.15 4.59 739.20 4.63 739.25 4.95 739.30 5.90 739.35 7.20 739.40 8.78 739.45 10.60 739.50 12.62 739.55 14.82 739.60 17.19 739.65 19.73 739.70 22.41 739.75 25.23 739.80 28.19 739.85 31.28 739.90 34.49 739.95 37.82 740.00 41.26 740.05 44.82 740.10 48.48 740.15 52.25 740.20 56.12 740.25 60.08 740.30 64.15 740.35 68.30 740.40 72.55 740.45 76.89 740.50 81.32 740.55 85.84 740.60 90.43 740.65 95.12 740.70 99.40 740.75 101.00 740.80 102.58 740.85 104.13 740.90 105.66 740.95 107.16 741.00 108.65 Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 50HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 31P: Wet Pond (EX) Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 733.30 28,958 0 733.40 29,137 2,905 733.50 29,316 5,827 733.60 29,495 8,768 733.70 29,675 11,727 733.80 29,854 14,703 733.90 30,033 17,697 734.00 30,212 20,710 734.10 30,403 23,740 734.20 30,593 26,790 734.30 30,784 29,859 734.40 30,975 32,947 734.50 31,166 36,054 734.60 31,356 39,180 734.70 31,547 42,325 734.80 31,738 45,489 734.90 31,928 48,673 735.00 32,119 51,875 735.10 32,316 55,097 735.20 32,513 58,338 735.30 32,711 61,599 735.40 32,908 64,880 735.50 33,105 68,181 735.60 33,302 71,501 735.70 33,500 74,842 735.80 33,697 78,201 735.90 33,894 81,581 736.00 34,092 84,980 736.10 34,289 88,399 736.20 34,486 91,838 736.30 34,683 95,296 736.40 34,880 98,775 736.50 35,078 102,273 736.60 35,275 105,790 736.70 35,472 109,328 736.80 35,669 112,885 736.90 35,867 116,461 737.00 36,064 120,058 737.10 36,268 123,675 737.20 36,472 127,312 737.30 36,675 130,969 737.40 36,879 134,647 737.50 37,083 138,345 737.60 37,287 142,063 737.70 37,491 145,802 737.80 37,694 149,561 737.90 37,898 153,341 738.00 38,102 157,141 738.10 38,310 160,962 738.20 38,518 164,803 738.30 38,726 168,665 738.40 38,934 172,548 Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 738.50 39,143 176,452 738.60 39,351 180,377 738.70 39,559 184,322 738.80 39,767 188,289 738.90 39,975 192,276 739.00 40,183 196,284 739.10 40,395 200,312 739.20 40,608 204,363 739.30 40,820 208,434 739.40 41,033 212,527 739.50 41,246 216,641 739.60 41,458 220,776 739.70 41,670 224,932 739.80 41,883 229,110 739.90 42,095 233,309 740.00 42,308 237,529 740.10 42,577 241,773 740.20 42,846 246,044 740.30 43,116 250,343 740.40 43,385 254,668 740.50 43,654 259,020 740.60 43,923 263,398 740.70 44,192 267,804 740.80 44,462 272,237 740.90 44,731 276,696 741.00 45,000 281,183 Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 51HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Summary for Pond 33P: New Dry Pond Inflow Area = 4.590 ac, 0.00% Impervious, Inflow Depth = 5.41" for 100 Yr-24 Hrs event Inflow = 38.10 cfs @ 11.98 hrs, Volume= 2.069 af Outflow = 5.14 cfs @ 12.04 hrs, Volume= 2.039 af, Atten= 87%, Lag= 3.9 min Primary = 5.14 cfs @ 12.04 hrs, Volume= 2.039 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 737.87' @ 16.49 hrs Surf.Area= 16,263 sf Storage= 46,124 cf Plug-Flow detention time= 825.1 min calculated for 2.037 af (98% of inflow) Center-of-Mass det. time= 817.2 min ( 1,593.5 - 776.3 ) Volume Invert Avail.Storage Storage Description #1 734.05' 154,655 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 734.05 6,657 0 0 735.00 10,390 8,097 8,097 736.00 12,313 11,352 19,449 737.00 14,365 13,339 32,788 738.00 16,544 15,455 48,242 739.00 18,851 17,698 65,940 740.00 21,287 20,069 86,009 743.00 24,477 68,646 154,655 Device Routing Invert Outlet Devices #1 Primary 734.05'18.0" Round Culvert L= 416.0' Ke= 0.500 Inlet / Outlet Invert= 734.05' / 733.33' S= 0.0017 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 1.77 sf Primary OutFlow Max=4.54 cfs @ 12.04 hrs HW=737.15' TW=736.21' (Dynamic Tailwater) 1=Culvert (Outlet Controls 4.54 cfs @ 2.57 fps) Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 52HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Pond 33P: New Dry Pond Inflow Primary Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420Flow (cfs)42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Inflow Area=4.590 ac Peak Elev=737.87' Storage=46,124 cf 18.0" Round Culvert n=0.013 L=416.0' S=0.0017 '/' 38.10 cfs 5.14 cfs Pond 33P: New Dry Pond Primary Stage-Discharge Discharge (cfs) 131211109876543210Elevation (feet)743 742 741 740 739 738 737 736 735 Culvert Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 53HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Pond 33P: New Dry Pond Surface Storage Stage-Area-Storage Storage (cubic-feet) 140,000120,000100,00080,00060,00040,00020,0000 Surface/Horizontal/Wetted Area (sq-ft) 24,00022,00020,00018,00016,00014,00012,00010,0008,0006,0004,0002,0000 Elevation (feet)743 742 741 740 739 738 737 736 735 Custom Stage Data Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 54HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Hydrograph for Pond 33P: New Dry Pond Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Primary (cfs) 0.00 0.00 0 734.05 0.00 2.50 0.00 0 734.05 0.00 5.00 0.14 540 734.13 0.01 7.50 0.34 2,200 734.35 0.15 10.00 0.84 4,357 734.61 0.52 12.50 3.23 40,344 737.51 3.64 15.00 0.90 43,908 737.73 0.30 17.50 0.57 45,806 737.85 0.71 20.00 0.39 43,921 737.73 0.66 22.50 0.35 41,430 737.58 0.62 25.00 0.00 38,327 737.37 0.49 27.50 0.00 34,388 737.11 0.38 30.00 0.00 31,227 736.89 0.33 32.50 0.00 28,343 736.68 0.31 35.00 0.00 25,585 736.48 0.30 37.50 0.00 22,953 736.28 0.29 40.00 0.00 20,445 736.08 0.27 42.50 0.00 18,060 735.89 0.26 45.00 0.00 15,804 735.70 0.25 47.50 0.00 13,672 735.51 0.23 50.00 0.00 11,671 735.33 0.22 52.50 0.00 9,799 735.16 0.20 55.00 0.00 8,059 735.00 0.19 57.50 0.00 6,475 734.84 0.17 60.00 0.00 5,079 734.69 0.14 62.50 0.00 3,883 734.56 0.12 65.00 0.00 2,907 734.44 0.10 67.50 0.00 2,159 734.35 0.07 70.00 0.00 1,619 734.28 0.05 Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 55HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Stage-Discharge for Pond 33P: New Dry Pond Elevation (feet) Primary (cfs) 734.05 0.00 734.10 0.00 734.15 0.02 734.20 0.04 734.25 0.08 734.30 0.13 734.35 0.20 734.40 0.28 734.45 0.38 734.50 0.49 734.55 0.62 734.60 0.75 734.65 0.89 734.70 1.04 734.75 1.20 734.80 1.37 734.85 1.54 734.90 1.73 734.95 1.92 735.00 2.11 735.05 2.31 735.10 2.52 735.15 2.73 735.20 2.94 735.25 3.15 735.30 3.36 735.35 3.57 735.40 3.78 735.45 3.99 735.50 4.19 735.55 4.38 735.60 4.57 735.65 4.75 735.70 4.91 735.75 5.06 735.80 5.19 735.85 5.30 735.90 5.39 735.95 5.43 736.00 5.42 736.05 5.19 736.10 5.30 736.15 5.40 736.20 5.50 736.25 5.60 736.30 5.70 736.35 5.79 736.40 5.89 736.45 5.98 736.50 6.07 736.55 6.16 736.60 6.25 Elevation (feet) Primary (cfs) 736.65 6.34 736.70 6.43 736.75 6.51 736.80 6.60 736.85 6.68 736.90 6.76 736.95 6.84 737.00 6.92 737.05 7.00 737.10 7.08 737.15 7.16 737.20 7.23 737.25 7.31 737.30 7.39 737.35 7.46 737.40 7.53 737.45 7.61 737.50 7.68 737.55 7.75 737.60 7.82 737.65 7.89 737.70 7.96 737.75 8.03 737.80 8.10 737.85 8.17 737.90 8.23 737.95 8.30 738.00 8.37 738.05 8.43 738.10 8.50 738.15 8.56 738.20 8.63 738.25 8.69 738.30 8.75 738.35 8.82 738.40 8.88 738.45 8.94 738.50 9.00 738.55 9.06 738.60 9.12 738.65 9.18 738.70 9.24 738.75 9.30 738.80 9.36 738.85 9.42 738.90 9.48 738.95 9.54 739.00 9.60 739.05 9.65 739.10 9.71 739.15 9.77 739.20 9.82 Elevation (feet) Primary (cfs) 739.25 9.88 739.30 9.93 739.35 9.99 739.40 10.05 739.45 10.10 739.50 10.15 739.55 10.21 739.60 10.26 739.65 10.32 739.70 10.37 739.75 10.42 739.80 10.48 739.85 10.53 739.90 10.58 739.95 10.63 740.00 10.68 740.05 10.74 740.10 10.79 740.15 10.84 740.20 10.89 740.25 10.94 740.30 10.99 740.35 11.04 740.40 11.09 740.45 11.14 740.50 11.19 740.55 11.24 740.60 11.29 740.65 11.34 740.70 11.38 740.75 11.43 740.80 11.48 740.85 11.53 740.90 11.58 740.95 11.62 741.00 11.67 741.05 11.72 741.10 11.77 741.15 11.81 741.20 11.86 741.25 11.91 741.30 11.95 741.35 12.00 741.40 12.04 741.45 12.09 741.50 12.14 741.55 12.18 741.60 12.23 741.65 12.27 741.70 12.32 741.75 12.36 741.80 12.41 Elevation (feet) Primary (cfs) 741.85 12.45 741.90 12.49 741.95 12.54 742.00 12.58 742.05 12.63 742.10 12.67 742.15 12.71 742.20 12.76 742.25 12.80 742.30 12.84 742.35 12.89 742.40 12.93 742.45 12.97 742.50 13.01 742.55 13.06 742.60 13.10 742.65 13.14 742.70 13.18 742.75 13.22 742.80 13.27 742.85 13.31 742.90 13.35 742.95 13.39 743.00 13.43 Type II 24-hr 100 Yr-24 Hrs Rainfall=6.46"Detention - 170184001 Printed 3/15/2021Prepared by Kimley-Horn Page 56HydroCAD® 10.10-5a s/n 09843 © 2020 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 33P: New Dry Pond Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 734.05 6,657 0 734.15 7,050 685 734.25 7,443 1,410 734.35 7,836 2,174 734.45 8,229 2,977 734.55 8,622 3,820 734.65 9,015 4,702 734.75 9,408 5,623 734.85 9,801 6,583 734.95 10,194 7,583 735.05 10,486 8,619 735.15 10,678 9,677 735.25 10,871 10,755 735.35 11,063 11,852 735.45 11,255 12,968 735.55 11,448 14,103 735.65 11,640 15,257 735.75 11,832 16,431 735.85 12,025 17,624 735.95 12,217 18,836 736.05 12,416 20,067 736.15 12,621 21,319 736.25 12,826 22,591 736.35 13,031 23,884 736.45 13,236 25,197 736.55 13,442 26,531 736.65 13,647 27,886 736.75 13,852 29,261 736.85 14,057 30,656 736.95 14,262 32,072 737.05 14,474 33,509 737.15 14,692 34,967 737.25 14,910 36,447 737.35 15,128 37,949 737.45 15,346 39,473 737.55 15,563 41,018 737.65 15,781 42,585 737.75 15,999 44,174 737.85 16,217 45,785 737.95 16,435 47,418 738.05 16,659 49,072 738.15 16,890 50,750 738.25 17,121 52,450 738.35 17,351 54,174 738.45 17,582 55,921 738.55 17,813 57,690 738.65 18,044 59,483 738.75 18,274 61,299 738.85 18,505 63,138 738.95 18,736 65,000 739.05 18,973 66,885 739.15 19,216 68,795 Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 739.25 19,460 70,729 739.35 19,704 72,687 739.45 19,947 74,669 739.55 20,191 76,676 739.65 20,434 78,708 739.75 20,678 80,763 739.85 20,922 82,843 739.95 21,165 84,948 740.05 21,340 87,075 740.15 21,446 89,214 740.25 21,553 91,364 740.35 21,659 93,524 740.45 21,765 95,696 740.55 21,872 97,878 740.65 21,978 100,070 740.75 22,085 102,273 740.85 22,191 104,487 740.95 22,297 106,711 741.05 22,403 108,946 741.15 22,510 111,192 741.25 22,616 113,448 741.35 22,722 115,715 741.45 22,829 117,993 741.55 22,935 120,281 741.65 23,041 122,580 741.75 23,148 124,889 741.85 23,254 127,209 741.95 23,360 129,540 742.05 23,467 131,882 742.15 23,573 134,234 742.25 23,680 136,596 742.35 23,786 138,969 742.45 23,892 141,353 742.55 23,998 143,748 742.65 24,105 146,153 742.75 24,211 148,569 742.85 24,317 150,995 742.95 24,424 153,432 170184001 Napleton Auxiliary Lot And Detail Center Appendix D: Storm Sewer Calculations RANDALL DRIVERANDALL DRIVEMarch 15, 2021 0'80'40'NORTHNAPLETON AUTOMOTIVE GROUP PROPOSED DRAINAGE AREA MAP Catchment Area Pervious (ac) Impervious (ac) Total (ac) c D11 0.043 0.437 0.48 0.80 D12 0.064 0.50 0.56 0.79 D13 0.093 0.68 0.77 0.78 D14 0.047 0.16 0.21 0.73 D15 0.049 0.12 0.17 0.69 D16 0.016 0.13 0.15 0.79 D17 0.016 0.18 0.2 0.81 D21 0.000 0.27 0.27 0.85 D22 0.023 0.387 0.41 0.82 D24 0.021 0.179 0.2 0.79 D25 0.060 0.74 0.8 0.81 D26 0.070 0.52 0.59 0.78 D27 0.047 0.543 0.59 0.81 D28 0.800 0 0.8 0.30 D31 0.008 0.062 0.07 0.79 D32 0.010 0.08 0.09 0.79 RD1 0.000 0.31 0.31 0.85 RD2 0.000 0.41 0.41 0.85 0.3 0.85 Napleton Storm Sewer Catchment Area Analysis 50 %Clogging Factor 3.3 Weir Coefficient Weir Equation Per INDOT = Q= CPd1.5 *50% Clogging Factor Applied 0.26 0.42 0.25 0.47 R-3010 0.72 D22 D32 6D13 0.78 6.12 187.2 0.67 0.77 2.10 2.1079.2 0.67 0.15 6 32.2 D15 15-Mar-21 AMM/CWB Napleton INLET CALCULATION COMPUTATION 0.73 6.12 79.2 0.67 0.21 4.95 Date: 187.2 0.67 0.48 Designed By: Project: Location: Carmel, IN Storm Event: 10 Year D12 0.79 6.12 151.2 0.67 0.56 Structure No. Runoff Coefficient ( C ) Rainfall Intensity (i) *Clear Opening Area (A) ( in2) Orifice Coefficient ( C ) Drainage Area (ac)CASTING TYPE R-3287-10V6 Q Allowable (cfs) 6 32.2 4.95 Depth of Water over Grate (h) (in) 2.35 R-3010D11 0.8 6.12 R-3455-C Q Calculated (cfs) 32.2 R-3010 R-3010 32.2 2.10 > 32.2 4.00 > 2.71 Gravity (g) (ft/s2) > 0.94D14 > 3.68 6 0.67 0.17 6 > 0.99 R-3010 32.2 D16 0.79 6.12 R-3010 D17 0.81 6.12 79.2 0.67 0.2 6 32.2 2.10 6.12 79.2 0.82 6.12 79.2 0.67 > 0.97 0.41 6 32.2 2.10 > 2.06 R-3010 D27 0.81 6.12 151.2 0.67 0.59 6 32.2 4.00 > 2.92 R-3287-10V D24 0.79 6.12 79.2 0.67 0.2 6 32.2 2.10 D25 0.44 R-30100.79 6.12 79.2 0.67 0.09 6 32.2 2.10 > R-3010 0.21 PONDING DEPTH (ft) 0.46 0.45 0.37 0.25 0.21 > 0.69 > D31 0.73 D21 0.85 6.12 79.2 0.67 1.40 R-3010 0.32 0.13 0.15 0.79 6.12 79.2 0.67 0.07 6 32.2 2.10 > 0.34 6 32.2 4.00 > 0.27 6 32.2 2.10 > 3.97 R-3287-10V 0.58 D26 0.78 6.12 151.2 0.67 0.59 6 32.2 4.00 > 2.82 R-3287-10V 0.46 0.81 6.12 151.2 0.67 0.8 ghCAQ2 Autodesk Storm and Sanitary AnalysisAutodesk Storm and Sanitary Analysis Performed by Kimley-Horn Autodesk Storm and Sanitary Analysis 2018 3/17/2021 Project Description Napleton SSA.SPF Project Options CFS Elevation Rational User-Defined Kinematic Wave YES NO Analysis Options Mar 15, 2021 00:00:00 Mar 16, 2021 00:00:00 Mar 15, 2021 00:00:00 0 days 0 01:00:00 days hh:mm:ss 0 00:05:00 days hh:mm:ss 0 00:05:00 days hh:mm:ss 30 seconds Number of Elements Qty 0 18 22 19 3 0 0 0 19 0 19 0 0 0 0 0 0 Rainfall Details 10 year(s) Outlets ........................................................................ Pollutants ............................................................................ Land Uses ........................................................................... Return Period....................................................................... Links.................................................................................... Channels .................................................................... Pipes .......................................................................... Pumps ........................................................................ Orifices ....................................................................... Weirs .......................................................................... Nodes................................................................................... Junctions .................................................................... Outfalls ....................................................................... Flow Diversions .......................................................... Inlets ........................................................................... Storage Nodes ........................................................... Runoff (Dry Weather) Time Step ........................................ Runoff (Wet Weather) Time Step ....................................... Reporting Time Step ........................................................... Routing Time Step .............................................................. Rain Gages ......................................................................... Subbasins............................................................................ Enable Overflow Ponding at Nodes .................................... Skip Steady State Analysis Time Periods ........................... Start Analysis On ................................................................ End Analysis On ................................................................. Start Reporting On .............................................................. Antecedent Dry Days .......................................................... File Name ........................................................................... Flow Units ........................................................................... Elevation Type .................................................................... Hydrology Method ............................................................... Time of Concentration (TOC) Method ................................ Link Routing Method ........................................................... Performed by Kimley-Horn Autodesk Storm and Sanitary Analysis 2018 3/17/2021 Subbasin Summary SN Subbasin Area Weighted Total Total Total Peak Time of ID Runoff Rainfall Runoff Runoff Runoff Concentration Coefficient Volume (ac)(in)(in)(ac-in)(cfs)(days hh:mm:ss) 1 Sub-D11 0.48 0.8000 0.51 0.41 0.19 2.34 0 00:05:00 2 Sub-D12 0.56 0.7900 0.51 0.40 0.23 2.71 0 00:05:00 3 Sub-D13 0.77 0.7800 0.51 0.40 0.31 3.67 0 00:05:00 4 Sub-D14 0.21 0.7300 0.51 0.37 0.08 0.92 0 00:05:00 5 Sub-D15 0.17 0.6900 0.51 0.35 0.06 0.73 0 00:05:00 6 Sub-D16 0.15 0.7900 0.51 0.40 0.06 0.72 0 00:05:00 7 Sub-D17 0.20 0.8100 0.51 0.41 0.08 0.99 0 00:05:00 8 Sub-D21 0.27 0.8500 0.51 0.43 0.12 1.42 0 00:05:00 9 Sub-D22 0.41 0.8200 0.51 0.42 0.17 2.08 0 00:05:00 10 Sub-D24 0.20 0.7900 0.51 0.40 0.08 0.95 0 00:05:00 11 Sub-D25 0.80 0.8100 0.51 0.41 0.33 3.96 0 00:05:00 12 Sub-D26 0.59 0.7800 0.51 0.40 0.23 2.81 0 00:05:00 13 Sub-D27 0.59 0.8100 0.51 0.41 0.24 2.92 0 00:05:00 14 Sub-D28 0.80 0.3000 0.85 0.25 0.20 1.22 0 00:10:00 15 Sub-D31 0.07 0.8000 0.51 0.41 0.03 0.37 0 00:05:00 16 Sub-D32 0.09 0.8000 0.51 0.41 0.04 0.43 0 00:05:00 17 Sub-RD1 0.31 0.8500 0.51 0.43 0.13 1.61 0 00:05:00 18 Sub-RD2 0.41 0.8500 0.51 0.43 0.18 2.15 0 00:05:00 Performed by Kimley-Horn Autodesk Storm and Sanitary Analysis 2018 3/17/2021 Node Summary SN Element Element Invert Ground/Rim Initial Surcharge Ponded Peak Max HGL Max Min Time of Total Total Time ID Type Elevation (Max)Water Elevation Area Inflow Elevation Surcharge Freeboard Peak Flooded Flooded Elevation Elevation Attained Depth Attained Flooding Volume Attained Occurrence (ft)(ft)(ft)(ft)(ft²)(cfs)(ft)(ft)(ft)(days hh:mm)(ac-in)(min) 1 D11 Junction 733.45 740.50 733.45 740.50 0.00 10.33 734.85 0.00 5.65 0 00:00 0.00 0.00 2 D12 Junction 733.58 740.59 733.58 740.59 0.00 8.17 734.77 0.00 5.82 0 00:00 0.00 0.00 3 D13 Junction 734.06 740.14 734.06 740.14 0.00 5.87 735.22 0.00 4.92 0 00:00 0.00 0.00 4 D14 Junction 734.69 740.92 734.69 740.92 0.00 3.00 735.58 0.00 5.34 0 00:00 0.00 0.00 5 D15 Junction 735.28 740.83 735.28 740.83 0.00 2.31 736.07 0.00 4.76 0 00:00 0.00 0.00 6 D16 Junction 735.62 740.22 735.62 740.22 0.00 1.66 736.31 0.00 3.91 0 00:00 0.00 0.00 7 D17 Junction 735.89 740.01 735.89 740.01 0.00 0.99 736.39 0.00 3.62 0 00:00 0.00 0.00 8 D21 Junction 735.16 740.03 735.16 740.03 0.00 15.27 736.62 0.00 3.41 0 00:00 0.00 0.00 9 D22 Junction 735.81 740.08 735.81 740.08 0.00 7.68 737.15 0.00 2.93 0 00:00 0.00 0.00 10 D23 Junction 736.53 740.71 736.53 740.71 0.00 1.52 737.10 0.00 3.62 0 00:00 0.00 0.00 11 D24 Junction 736.82 740.00 736.82 740.00 0.00 0.95 737.29 0.00 2.71 0 00:00 0.00 0.00 12 D25 Junction 736.85 740.00 736.85 740.00 0.00 6.75 737.83 0.00 2.17 0 00:00 0.00 0.00 13 D26 Junction 737.06 740.05 737.06 740.05 0.00 2.81 737.70 0.00 2.35 0 00:00 0.00 0.00 14 D27 Junction 736.66 739.50 736.66 739.50 0.00 2.92 737.25 0.00 2.26 0 00:00 0.00 0.00 15 D28 Junction 738.00 739.25 738.00 739.25 0.00 1.22 738.38 0.00 0.87 0 00:00 0.00 0.00 16 D31 Junction 727.14 741.15 727.14 741.15 0.00 2.93 732.98 0.00 8.18 0 00:00 0.00 0.00 17 D32 Junction 736.16 741.12 736.16 741.12 0.00 0.43 736.32 0.00 4.80 0 00:00 0.00 0.00 18 RD1 Junction 740.86 742.71 740.86 742.71 0.00 1.61 741.15 0.00 1.56 0 00:00 0.00 0.00 19 RD2 Junction 730.48 742.46 730.48 742.46 0.00 2.15 730.79 0.00 11.66 0 00:00 0.00 0.00 20 Out-1D10 TO 07 Outfall 733.30 10.31 734.69 21 Out-1D21 TO D20 Outfall 735.00 15.25 736.46 22 Out-1D31 TO D30 Outfall 725.02 2.93 725.41 Performed by Kimley-Horn Autodesk Storm and Sanitary Analysis 2018 3/17/2021 Link Summary SN Element Element From To (Outlet)Length Inlet Outlet Average Diameter or Manning's Peak Design Flow Peak Flow/Peak Flow Peak Flow Peak Flow Total Time Reported ID Type (Inlet)Node Invert Invert Slope Height Roughness Flow Capacity Design Flow Velocity Depth Depth/Surcharged Condition Node Elevation Elevation Ratio Total Depth Ratio (ft)(ft)(ft)(%)(in)(cfs)(cfs)(ft/sec)(ft)(min) 1 07 TO 08 Pipe D12 D11 9.00 733.58 733.55 0.3000 24.000 0.0130 8.17 12.39 0.66 4.21 1.19 0.59 0.00 Calculated 2 D10 TO 07 Pipe D11 Out-1D10 TO 07 50.88 733.45 733.30 0.3000 24.000 0.0130 10.31 12.41 0.83 4.43 1.39 0.70 0.00 Calculated 3 D12 TO D11 Pipe D14 D13 179.06 734.69 734.16 0.2900 15.000 0.0130 2.95 3.50 0.84 3.37 0.87 0.70 0.00 Calculated 4 D12 TO D13 Pipe D15 D14 169.31 735.28 734.79 0.2900 15.000 0.0130 2.24 3.50 0.64 3.16 0.72 0.58 0.00 Calculated 5 D13 TO D11 Pipe D13 D12 131.00 734.06 733.60 0.3500 18.000 0.0130 5.83 6.22 0.94 4.10 1.15 0.77 0.00 Calculated 6 D14 TO D13 Pipe D16 D15 71.83 735.62 735.39 0.3200 12.000 0.0130 1.64 2.02 0.81 2.92 0.68 0.68 0.00 Calculated 7 D15 TO D14 Pipe D17 D16 56.17 735.89 735.72 0.3200 12.000 0.0130 0.96 2.01 0.48 3.77 0.49 0.49 0.00 Calculated 8 D21 TO D20 Pipe D21 Out-1D21 TO D20 48.45 735.16 735.00 0.3400 30.000 0.0130 15.25 23.79 0.64 5.15 1.45 0.58 0.00 Calculated 9 D21 TO D22 Pipe D22 D21 163.04 735.81 735.26 0.3400 24.000 0.0130 7.45 13.12 0.57 4.38 1.08 0.54 0.00 Calculated 10 D22 TO D23 Pipe D23 D22 183.45 736.53 735.91 0.3400 18.000 0.0130 1.48 6.09 0.24 2.86 0.50 0.34 0.00 Calculated 11 D23 TO D24 Pipe D24 D23 56.17 736.82 736.63 0.3400 12.000 0.0130 0.92 2.07 0.45 3.78 0.47 0.47 0.00 Calculated 12 D25 TO D21 Pipe D25 D21 111.58 736.85 735.52 1.1900 15.000 0.0130 6.65 7.03 0.95 6.98 0.96 0.77 0.00 Calculated 13 D26 TO D25 Pipe D26 D25 10.00 737.06 736.95 1.1900 12.000 0.0130 2.80 3.88 0.72 5.38 0.63 0.63 0.00 Calculated 14 D27 TO D22 Pipe D27 D22 9.77 736.66 736.56 1.0000 15.000 0.0130 2.91 6.46 0.45 5.13 0.59 0.47 0.00 Calculated 15 D28 TO D23 Pipe D28 D23 114.00 738.00 736.53 1.2900 12.000 0.0130 1.20 4.05 0.30 5.90 0.37 0.37 0.00 Calculated 16 D31 TO D30 Pipe D31 Out-1D31 TO D30 35.33 727.14 725.02 6.0000 12.000 0.0120 2.93 9.45 0.31 10.62 0.38 0.38 0.00 Calculated 17 D32 TO D31 Pipe D32 D31 67.10 736.16 732.82 4.9800 12.000 0.0120 0.43 8.61 0.05 7.31 0.15 0.15 0.00 Calculated 18 D33 TO D31 Pipe RD2 D31 45.41 730.48 727.14 7.3600 12.000 0.0120 2.14 10.47 0.20 10.65 0.31 0.31 0.00 Calculated 19 RD1 TO D22 Pipe RD1 D22 82.73 740.86 736.81 4.8900 12.000 0.0120 1.60 8.54 0.19 10.28 0.29 0.29 0.00 Calculated Performed by Kimley-Horn Autodesk Storm and Sanitary Analysis 2018 3/17/2021 Junction Input SN Element Invert Ground/Rim Ground/Rim Initial Initial Surcharge Surcharge Ponded Minimum ID Elevation (Max)(Max)Water Water Elevation Depth Area Pipe Elevation Offset Elevation Depth Cover (ft)(ft)(ft)(ft)(ft)(ft)(ft)(ft²)(in) 1 D11 733.45 740.50 7.05 733.45 0.00 740.50 0.00 0.00 0.00 2 D12 733.58 740.59 7.01 733.58 0.00 740.59 0.00 0.00 0.00 3 D13 734.06 740.14 6.08 734.06 0.00 740.14 0.00 0.00 0.00 4 D14 734.69 740.92 6.23 734.69 0.00 740.92 0.00 0.00 0.00 5 D15 735.28 740.83 5.54 735.28 0.00 740.83 0.00 0.00 0.00 6 D16 735.62 740.22 4.60 735.62 0.00 740.22 0.00 0.00 0.00 7 D17 735.89 740.01 4.11 735.89 0.00 740.01 0.00 0.00 0.00 8 D21 735.16 740.03 4.86 735.16 0.00 740.03 0.00 0.00 0.00 9 D22 735.81 740.08 4.27 735.81 0.00 740.08 0.00 0.00 0.00 10 D23 736.53 740.71 4.18 736.53 0.00 740.71 0.00 0.00 0.00 11 D24 736.82 740.00 3.18 736.82 0.00 740.00 0.00 0.00 0.00 12 D25 736.85 740.00 3.15 736.85 0.00 740.00 0.00 0.00 0.00 13 D26 737.06 740.05 2.98 737.06 0.00 740.05 0.00 0.00 0.00 14 D27 736.66 739.50 2.85 736.66 0.00 739.50 0.00 0.00 0.00 15 D28 738.00 739.25 1.25 738.00 0.00 739.25 0.00 0.00 0.00 16 D31 727.14 741.15 14.01 727.14 0.00 741.15 0.00 0.00 0.00 17 D32 736.16 741.12 4.95 736.16 0.00 741.12 0.00 0.00 0.00 18 RD1 740.86 742.71 1.86 740.86 0.00 742.71 0.00 0.00 0.00 19 RD2 730.48 742.46 11.97 730.48 0.00 742.46 0.00 0.00 0.00 Performed by Kimley-Horn Autodesk Storm and Sanitary Analysis 2018 3/17/2021 Junction Results SN Element Peak Peak Max HGL Max HGL Max Min Average HGL Average HGL Time of Time of Total Total Time ID Inflow Lateral Elevation Depth Surcharge Freeboard Elevation Depth Max HGL Peak Flooded Flooded Inflow Attained Attained Depth Attained Attained Attained Occurrence Flooding Volume Attained Occurrence (cfs)(cfs)(ft)(ft)(ft)(ft)(ft)(ft)(days hh:mm)(days hh:mm)(ac-in)(min) 1 D11 10.33 2.34 734.85 1.40 0.00 5.65 733.56 0.11 0 00:05 0 00:00 0.00 0.00 2 D12 8.17 2.70 734.77 1.19 0.00 5.82 733.61 0.03 0 00:05 0 00:00 0.00 0.00 3 D13 5.87 3.67 735.22 1.16 0.00 4.92 734.17 0.11 0 00:05 0 00:00 0.00 0.00 4 D14 3.00 0.92 735.58 0.89 0.00 5.34 734.79 0.10 0 00:06 0 00:00 0.00 0.00 5 D15 2.31 0.72 736.07 0.79 0.00 4.76 735.39 0.11 0 00:05 0 00:00 0.00 0.00 6 D16 1.66 0.72 736.31 0.69 0.00 3.91 735.72 0.10 0 00:05 0 00:00 0.00 0.00 7 D17 0.99 0.99 736.39 0.50 0.00 3.62 735.90 0.01 0 00:05 0 00:00 0.00 0.00 8 D21 15.27 1.42 736.62 1.46 0.00 3.41 735.53 0.37 0 00:05 0 00:00 0.00 0.00 9 D22 7.68 2.08 737.15 1.34 0.00 2.93 736.81 1.00 0 00:05 0 00:00 0.00 0.00 10 D23 1.52 0.00 737.10 0.57 0.00 3.62 736.63 0.10 0 00:05 0 00:00 0.00 0.00 11 D24 0.95 0.95 737.29 0.47 0.00 2.71 736.82 0.00 0 00:05 0 00:00 0.00 0.00 12 D25 6.75 3.96 737.83 0.98 0.00 2.17 736.95 0.10 0 00:05 0 00:00 0.00 0.00 13 D26 2.81 2.81 737.70 0.64 0.00 2.35 737.07 0.01 0 00:05 0 00:00 0.00 0.00 14 D27 2.92 2.92 737.25 0.59 0.00 2.26 736.66 0.00 0 00:05 0 00:00 0.00 0.00 15 D28 1.22 1.22 738.38 0.38 0.00 0.87 738.00 0.00 0 00:10 0 00:00 0.00 0.00 16 D31 2.93 0.37 732.98 5.84 0.00 8.18 732.83 5.69 0 00:05 0 00:00 0.00 0.00 17 D32 0.43 0.43 736.32 0.16 0.00 4.80 736.16 0.00 0 00:05 0 00:00 0.00 0.00 18 RD1 1.61 1.61 741.15 0.29 0.00 1.56 740.86 0.00 0 00:05 0 00:00 0.00 0.00 19 RD2 2.15 2.15 730.79 0.31 0.00 11.66 730.49 0.01 0 00:05 0 00:00 0.00 0.00 Performed by Kimley-Horn Autodesk Storm and Sanitary Analysis 2018 3/17/2021 Pipe Input SN Element Length Inlet Inlet Outlet Outlet Total Average Pipe Pipe Pipe Manning's Entrance Exit/Bend Additional Initial Flap No. of ID Invert Invert Invert Invert Drop Slope Shape Diameter or Width Roughness Losses Losses Losses Flow Gate Barrels Elevation Offset Elevation Offset Height (ft)(ft)(ft)(ft)(ft)(ft)(%)(in)(in)(cfs) 1 07 TO 08 9.00 733.58 0.00 733.55 0.10 0.03 0.3000 CIRCULAR 24.000 24.000 0.0130 0.5000 0.5000 0.0000 0.00 No 1 2 D10 TO 07 50.88 733.45 0.00 733.30 0.00 0.15 0.3000 CIRCULAR 24.000 24.000 0.0130 0.5000 0.5000 0.0000 0.00 No 1 3 D12 TO D11 179.06 734.69 0.00 734.16 0.10 0.53 0.2900 CIRCULAR 15.000 15.000 0.0130 0.5000 0.5000 0.0000 0.00 No 1 4 D12 TO D13 169.31 735.28 0.00 734.79 0.10 0.50 0.2900 CIRCULAR 15.000 15.000 0.0130 0.5000 0.5000 0.0000 0.00 No 1 5 D13 TO D11 131.00 734.06 0.00 733.60 0.02 0.46 0.3500 CIRCULAR 18.000 18.000 0.0130 0.5000 0.5000 0.0000 0.00 No 1 6 D14 TO D13 71.83 735.62 0.00 735.39 0.10 0.23 0.3200 CIRCULAR 12.000 12.000 0.0130 0.5000 0.5000 0.0000 0.00 No 1 7 D15 TO D14 56.17 735.89 0.00 735.72 0.10 0.18 0.3200 CIRCULAR 12.000 12.000 0.0130 0.5000 0.5000 0.0000 0.00 No 1 8 D21 TO D20 48.45 735.16 0.00 735.00 0.00 0.16 0.3400 CIRCULAR 30.000 30.000 0.0130 0.5000 0.5000 0.0000 0.00 No 1 9 D21 TO D22 163.04 735.81 0.00 735.26 0.10 0.55 0.3400 CIRCULAR 24.000 24.000 0.0130 0.5000 0.5000 0.0000 0.00 No 1 10 D22 TO D23 183.45 736.53 0.00 735.91 0.10 0.62 0.3400 CIRCULAR 18.000 18.000 0.0130 0.5000 0.5000 0.0000 0.00 No 1 11 D23 TO D24 56.17 736.82 0.00 736.63 0.10 0.19 0.3400 CIRCULAR 12.000 12.000 0.0130 0.5000 0.5000 0.0000 0.00 No 1 12 D25 TO D21 111.58 736.85 0.00 735.52 0.36 1.32 1.1900 CIRCULAR 15.000 15.000 0.0130 0.5000 0.5000 0.0000 0.00 No 1 13 D26 TO D25 10.00 737.06 0.00 736.95 0.10 0.12 1.1900 CIRCULAR 12.000 12.000 0.0130 0.5000 0.5000 0.0000 0.00 No 1 14 D27 TO D22 9.77 736.66 0.00 736.56 0.75 0.10 1.0000 CIRCULAR 15.000 15.000 0.0130 0.5000 0.5000 0.0000 0.00 No 1 15 D28 TO D23 114.00 738.00 0.00 736.53 0.00 1.47 1.2900 CIRCULAR 12.000 12.000 0.0130 0.5000 0.5000 0.0000 0.00 No 1 16 D31 TO D30 35.33 727.14 0.00 725.02 0.00 2.12 6.0000 CIRCULAR 12.000 12.000 0.0120 0.5000 0.5000 0.0000 0.00 No 1 17 D32 TO D31 67.10 736.16 0.00 732.82 5.68 3.34 4.9800 CIRCULAR 12.000 12.000 0.0120 0.5000 0.5000 0.0000 0.00 No 1 18 D33 TO D31 45.41 730.48 0.00 727.14 0.00 3.34 7.3600 CIRCULAR 12.000 12.000 0.0120 0.5000 0.5000 0.0000 0.00 No 1 19 RD1 TO D22 82.73 740.86 0.00 736.81 1.00 4.05 4.8900 CIRCULAR 12.000 12.000 0.0120 0.5000 0.5000 0.0000 0.00 No 1 Performed by Kimley-Horn Autodesk Storm and Sanitary Analysis 2018 3/17/2021 Pipe Results SN Element Peak Time of Design Flow Peak Flow/Peak Flow Travel Peak Flow Peak Flow Total Time Froude Reported ID Flow Peak Flow Capacity Design Flow Velocity Time Depth Depth/Surcharged Number Condition Occurrence Ratio Total Depth Ratio (cfs)(days hh:mm)(cfs)(ft/sec)(min)(ft)(min) 1 07 TO 08 8.17 0 00:05 12.39 0.66 4.21 0.04 1.19 0.59 0.00 Calculated 2 D10 TO 07 10.31 0 00:05 12.41 0.83 4.43 0.19 1.39 0.70 0.00 Calculated 3 D12 TO D11 2.95 0 00:06 3.50 0.84 3.37 0.89 0.87 0.70 0.00 Calculated 4 D12 TO D13 2.24 0 00:06 3.50 0.64 3.16 0.89 0.72 0.58 0.00 Calculated 5 D13 TO D11 5.83 0 00:06 6.22 0.94 4.10 0.53 1.15 0.77 0.00 Calculated 6 D14 TO D13 1.64 0 00:05 2.02 0.81 2.92 0.41 0.68 0.68 0.00 Calculated 7 D15 TO D14 0.96 0 00:05 2.01 0.48 3.77 0.25 0.49 0.49 0.00 Calculated 8 D21 TO D20 15.25 0 00:05 23.79 0.64 5.15 0.16 1.45 0.58 0.00 Calculated 9 D21 TO D22 7.45 0 00:05 13.12 0.57 4.38 0.62 1.08 0.54 0.00 Calculated 10 D22 TO D23 1.48 0 00:06 6.09 0.24 2.86 1.07 0.50 0.34 0.00 Calculated 11 D23 TO D24 0.92 0 00:05 2.07 0.45 3.78 0.25 0.47 0.47 0.00 Calculated 12 D25 TO D21 6.65 0 00:05 7.03 0.95 6.98 0.27 0.96 0.77 0.00 Calculated 13 D26 TO D25 2.80 0 00:05 3.88 0.72 5.38 0.03 0.63 0.63 0.00 Calculated 14 D27 TO D22 2.91 0 00:05 6.46 0.45 5.13 0.03 0.59 0.47 0.00 Calculated 15 D28 TO D23 1.20 0 00:10 4.05 0.30 5.90 0.32 0.37 0.37 0.00 Calculated 16 D31 TO D30 2.93 0 00:05 9.45 0.31 10.62 0.06 0.38 0.38 0.00 Calculated 17 D32 TO D31 0.43 0 00:05 8.61 0.05 7.31 0.15 0.15 0.15 0.00 Calculated 18 D33 TO D31 2.14 0 00:05 10.47 0.20 10.65 0.07 0.31 0.31 0.00 Calculated 19 RD1 TO D22 1.60 0 00:05 8.54 0.19 10.28 0.13 0.29 0.29 0.00 Calculated Aqua-Swirl™ Model Swirl Chamber Diameter Water Quality Treatment Flow2 Oil/Debris Storage Capacity Sediment Storage Capacity (ft.)(cfs)(gal)(ft3) On/Offline CFD1 812 AS-3 3.25 10 16 1.8 110 20 AS-4 4.25 12 18 3.2 190 32 AS-5 5.00 12 24 4.4 270 45 AS-6 6.00 14 30 6.3 390 65 AS-7 7.00 16 36 8.6 540 90 AS-8 8.00 18 42 11.2 710 115 AS-9 9.00 20 48 14.2 910 145 AS-10 10.0 22 54 17.5 1130 180 AS-12 12.0 24 48 25.2 1698 270 AS-XX Custom -- -- >26 -- -- *Higher water quality treatment flow rates can be designed with multiple swirls. 1) 2) 10 Aqua-Swirl™ Sizing Chart (English) The design and orientation of the Aqua-Filter™ generally entails some degree of customization. For assistance in design and specific sizing using historical rainfall data, please refer to an AquaShield™ representative or visit our website at www.AquaShieldInc.com. CAD details and specifications are available upon request. Maximum Stub-Out Pipe Outer Diameter (in.) The Aqua-Swirl™ Conveyance Flow Diversion (CFD)provides full treatment of the "first flush," while the peak design storm is diverted and channeled through the main conveyance pipe. Please refer to your local representative for more information. Many regulatory agencies are establishing "water quality treatment flow rates"for their areas based on the initial movement of pollutants into the storm drainage system. The treatment flow rate of the Aqua-Swirl™ system is engineered to meet or exceed the local water quality treatment criteria. This "water quality treatment flow rate" typically represents approximately 90% to 95% of the total annual runoff volume. AS-2 2.50 1.1 37