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MedVet MedVet Carmel – Animal Hospital Renovation and Addition 9650 Mayflower Park Drive Carmel, Indiana 46032 Stormwater Drainage Report Prepared By: Korda/Nemeth Engineering, Inc. 1650 Watermark Drive Columbus, Ohio 43215 Korda File: 2021-0012 3/8/2022 Korda/Nemeth Engineering, Inc. - Consulting Engineers 1650 Watermark Drive, Suite 200 | Columbus, Ohio 43215 USA | +1.614.487.1650 | www.korda.com 3/8/2022 City of Carmel Engineering Division City Hall, One Civic Square Carmel, IN 46032 RE: MedVet Carmel Animal Hospital Renovation and Addition To Whom it May Concern: The following is our Stormwater Drainage Report for MedVet Carmel – Animal Hospital Renovation and Addition at 9650 Mayflower Park Drive in Carmel, Indiana. Please review this report and provide comments at your earliest convenience. If you have any questions, please contact our office at (614) 487-1650. Yours truly, KORDA/NEMETH ENGINEERING, INC. Consulting Engineers Andy May, E.I. Design Engineer Dan Biru, PE Project Manager Attachment(s) Table of Contents Cover Letter Table of Contents Stormwater Management Narrative/Summary of Calculations Project Description Existing Drainage Conditions Proposed Drainage Conditions Summary of Calculations Appendices A. Stormwater Runoff Calculations HydroCad Report 2yr – 1, 2, 3, 6, 12, 24 hour HydroCad Report 10yr – 1, 2, 3, 6, 12, 24 hour HydroCad Report 100yr – 1, 2, 3, 6, 12, 24 hour B. Pervious/Impervious Area Site Map 1 Stormwater Management Report for MedVet Carmel Animal Hospital Renovation and Addition Stormwater Management Narrative/Summary of Calculations Project Description The project site is a part of the Mayflower Park business development and is approximately 5.2 acres in size. The project includes a two-story building addition to the existing building structure and an expansion of the existing parking, sidewalks, and storm sewer infrastructure. Existing Drainage Conditions The existing site includes an existing MedVet hospital building and associated parking areas. There is an existing storm sewer system on site which discharges into an existing retention pond for water quantity treatment. Water quality treatment is provided for the site by utilizing an Aqua-swirl (AS-4) device prior to storm sewer discharge into the retention pond. The remainder of the site drains to the pond via swales. The retention pond outlets through a 24” CMP at the southeast corner of the site. The detention pond system was masterplanned for a full build-out condition of the site per the reference reports “Mayflower Park Drainage Narrative” prepared by Fink, Roberts, & Petrie, Inc., April 11, 2001 and the “Mayflower Vet Clinic Drainage Report” prepared by DeBoy Land Development Services, Inc., June 9, 2005. Proposed Drainage Conditions The MedVet Carmel Animal Hospital Renovation and Addition will disturb approximately 1.30 acres and add approximately 44,424 sf/1.02 acres of impervious area. The proposed project includes a new two-story building addition and expansion of existing parking and hardscape. New storm sewer inlets will collect runoff from the parking lot surface drainage and building roof drainage and will tie into the existing stormwater infrastructure. Since the site detention basin was designed for a full site buildout, no changes are proposed for the detention pond or the pond outlets. Summary of Calculations Hydraulic modelling calculations were completed using HydroCAD Version 10.00. The results can be found in Appendix A. Appendix A Stormwater Runoff Calculations 1S Storm 1P Detention Pond Routing Diagram for e - Post - Development Basin Routing Prepared by {enter your company name here}, Printed 3/8/2022 HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Subcat Reach Pond Link Indy Huff 24-hr 2yr-01hr Rainfall=1.25"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 2HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Storm Runoff = 1.77 cfs @ 12.20 hrs, Volume= 71,056 cf, Depth= 0.33" Routed to Pond 1P : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Indy Huff 24-hr 2yr-01hr Rainfall=1.25" Area (sf) CN Description * 1,183,381 98 Paved Parking & Roofs Offsite * 1,164,243 74 >75% Grass Cover, Offsite * 44,424 98 Paved Parking & Roofs, New Work 118,498 74 >75% Grass cover, Good, HSG C * 36,180 98 Paved Parking & Roofs, Existing On Site 2,546,726 86 Weighted Average 1,282,741 50.37% Pervious Area 1,263,985 49.63% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Roof 48.1 2,600 0.0036 0.90 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 53.1 2,600 Total Subcatchment 1S: Storm Runoff Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)1 0 Indy Huff 24-hr 2yr-01hr Rainfall=1.25" Runoff Area=2,546,726 sf Runoff Volume=71,056 cf Runoff Depth=0.33" Flow Length=2,600' Slope=0.0036 '/' Tc=53.1 min CN=86 1.77 cfs Indy Huff 24-hr 2yr-01hr Rainfall=1.25"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 3HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Pond 1P: Detention Pond Inflow Area = 2,546,726 sf, 49.63% Impervious, Inflow Depth = 0.33" for 2yr-01hr event Inflow = 1.77 cfs @ 12.20 hrs, Volume= 71,056 cf Outflow = 1.48 cfs @ 13.53 hrs, Volume= 69,934 cf, Atten= 16%, Lag= 79.7 min Primary = 1.48 cfs @ 13.53 hrs, Volume= 69,934 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Peak Elev= 882.34' @ 13.53 hrs Surf.Area= 23,385 sf Storage= 14,414 cf Plug-Flow detention time= 209.1 min calculated for 69,876 cf (98% of inflow) Center-of-Mass det. time= 201.9 min ( 1,142.8 - 941.0 ) Volume Invert Avail.Storage Storage Description #1 881.68' 132,713 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 881.68 21,378 0 0 882.00 21,544 6,868 6,868 883.00 27,026 24,285 31,153 884.00 39,955 33,491 64,643 885.00 96,185 68,070 132,713 Device Routing Invert Outlet Devices #1 Primary 881.68'24.0" Round CMP_Round 24" L= 98.0' Ke= 0.500 Inlet / Outlet Invert= 881.68' / 880.82' S= 0.0088 '/' Cc= 0.900 n= 0.025, Flow Area= 3.14 sf #2 Secondary 884.50'100.0' long Broad-Crested Rectangular Weir Head (feet) 0.50 Coef. (English) 3.07 Primary OutFlow Max=1.48 cfs @ 13.53 hrs HW=882.34' (Free Discharge) 1=CMP_Round 24" (Barrel Controls 1.48 cfs @ 2.46 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=881.68' (Free Discharge) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Indy Huff 24-hr 2yr-01hr Rainfall=1.25"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 4HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Pond 1P: Detention Pond Inflow Outflow Primary Secondary Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)1 0 Inflow Area=2,546,726 sf Peak Elev=882.34' Storage=14,414 cf 1.77 cfs 1.48 cfs 1.48 cfs 0.00 cfs Indy Huff 24-hr 2yr-02hr Rainfall=1.52"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 5HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Storm Runoff = 2.66 cfs @ 11.86 hrs, Volume= 107,277 cf, Depth= 0.51" Routed to Pond 1P : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Indy Huff 24-hr 2yr-02hr Rainfall=1.52" Area (sf) CN Description * 1,183,381 98 Paved Parking & Roofs Offsite * 1,164,243 74 >75% Grass Cover, Offsite * 44,424 98 Paved Parking & Roofs, New Work 118,498 74 >75% Grass cover, Good, HSG C * 36,180 98 Paved Parking & Roofs, Existing On Site 2,546,726 86 Weighted Average 1,282,741 50.37% Pervious Area 1,263,985 49.63% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Roof 48.1 2,600 0.0036 0.90 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 53.1 2,600 Total Subcatchment 1S: Storm Runoff Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)2 1 0 Indy Huff 24-hr 2yr-02hr Rainfall=1.52" Runoff Area=2,546,726 sf Runoff Volume=107,277 cf Runoff Depth=0.51" Flow Length=2,600' Slope=0.0036 '/' Tc=53.1 min CN=86 2.66 cfs Indy Huff 24-hr 2yr-02hr Rainfall=1.52"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 6HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Pond 1P: Detention Pond Inflow Area = 2,546,726 sf, 49.63% Impervious, Inflow Depth = 0.51" for 2yr-02hr event Inflow = 2.66 cfs @ 11.86 hrs, Volume= 107,277 cf Outflow = 2.40 cfs @ 13.09 hrs, Volume= 106,141 cf, Atten= 10%, Lag= 73.9 min Primary = 2.40 cfs @ 13.09 hrs, Volume= 106,141 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Peak Elev= 882.52' @ 13.09 hrs Surf.Area= 24,394 sf Storage= 18,810 cf Plug-Flow detention time= 172.0 min calculated for 106,053 cf (99% of inflow) Center-of-Mass det. time= 167.4 min ( 1,080.0 - 912.6 ) Volume Invert Avail.Storage Storage Description #1 881.68' 132,713 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 881.68 21,378 0 0 882.00 21,544 6,868 6,868 883.00 27,026 24,285 31,153 884.00 39,955 33,491 64,643 885.00 96,185 68,070 132,713 Device Routing Invert Outlet Devices #1 Primary 881.68'24.0" Round CMP_Round 24" L= 98.0' Ke= 0.500 Inlet / Outlet Invert= 881.68' / 880.82' S= 0.0088 '/' Cc= 0.900 n= 0.025, Flow Area= 3.14 sf #2 Secondary 884.50'100.0' long Broad-Crested Rectangular Weir Head (feet) 0.50 Coef. (English) 3.07 Primary OutFlow Max=2.40 cfs @ 13.09 hrs HW=882.52' (Free Discharge) 1=CMP_Round 24" (Barrel Controls 2.40 cfs @ 2.83 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=881.68' (Free Discharge) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Indy Huff 24-hr 2yr-02hr Rainfall=1.52"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 7HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Pond 1P: Detention Pond Inflow Outflow Primary Secondary Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)2 1 0 Inflow Area=2,546,726 sf Peak Elev=882.52' Storage=18,810 cf 2.66 cfs 2.40 cfs 2.40 cfs 0.00 cfs Indy Huff 24-hr 2yr-03hr Rainfall=1.68"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 8HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Storm Runoff = 3.22 cfs @ 11.85 hrs, Volume= 130,542 cf, Depth= 0.62" Routed to Pond 1P : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Indy Huff 24-hr 2yr-03hr Rainfall=1.68" Area (sf) CN Description * 1,183,381 98 Paved Parking & Roofs Offsite * 1,164,243 74 >75% Grass Cover, Offsite * 44,424 98 Paved Parking & Roofs, New Work 118,498 74 >75% Grass cover, Good, HSG C * 36,180 98 Paved Parking & Roofs, Existing On Site 2,546,726 86 Weighted Average 1,282,741 50.37% Pervious Area 1,263,985 49.63% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Roof 48.1 2,600 0.0036 0.90 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 53.1 2,600 Total Subcatchment 1S: Storm Runoff Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)3 2 1 0 Indy Huff 24-hr 2yr-03hr Rainfall=1.68" Runoff Area=2,546,726 sf Runoff Volume=130,542 cf Runoff Depth=0.62" Flow Length=2,600' Slope=0.0036 '/' Tc=53.1 min CN=86 3.22 cfs Indy Huff 24-hr 2yr-03hr Rainfall=1.68"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 9HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Pond 1P: Detention Pond Inflow Area = 2,546,726 sf, 49.63% Impervious, Inflow Depth = 0.62" for 2yr-03hr event Inflow = 3.22 cfs @ 11.85 hrs, Volume= 130,542 cf Outflow = 2.97 cfs @ 12.92 hrs, Volume= 129,400 cf, Atten= 8%, Lag= 64.3 min Primary = 2.97 cfs @ 12.92 hrs, Volume= 129,400 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Peak Elev= 882.62' @ 12.92 hrs Surf.Area= 24,944 sf Storage= 21,284 cf Plug-Flow detention time= 158.7 min calculated for 129,400 cf (99% of inflow) Center-of-Mass det. time= 153.4 min ( 1,053.0 - 899.5 ) Volume Invert Avail.Storage Storage Description #1 881.68' 132,713 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 881.68 21,378 0 0 882.00 21,544 6,868 6,868 883.00 27,026 24,285 31,153 884.00 39,955 33,491 64,643 885.00 96,185 68,070 132,713 Device Routing Invert Outlet Devices #1 Primary 881.68'24.0" Round CMP_Round 24" L= 98.0' Ke= 0.500 Inlet / Outlet Invert= 881.68' / 880.82' S= 0.0088 '/' Cc= 0.900 n= 0.025, Flow Area= 3.14 sf #2 Secondary 884.50'100.0' long Broad-Crested Rectangular Weir Head (feet) 0.50 Coef. (English) 3.07 Primary OutFlow Max=2.97 cfs @ 12.92 hrs HW=882.62' (Free Discharge) 1=CMP_Round 24" (Barrel Controls 2.97 cfs @ 3.01 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=881.68' (Free Discharge) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Indy Huff 24-hr 2yr-03hr Rainfall=1.68"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 10HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Pond 1P: Detention Pond Inflow Outflow Primary Secondary Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)3 2 1 0 Inflow Area=2,546,726 sf Peak Elev=882.62' Storage=21,284 cf 3.22 cfs 2.97 cfs 2.97 cfs 0.00 cfs Indy Huff 24-hr 2yr-06hr Rainfall=1.98"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 11HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Storm Runoff = 4.34 cfs @ 11.75 hrs, Volume= 176,974 cf, Depth= 0.83" Routed to Pond 1P : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Indy Huff 24-hr 2yr-06hr Rainfall=1.98" Area (sf) CN Description * 1,183,381 98 Paved Parking & Roofs Offsite * 1,164,243 74 >75% Grass Cover, Offsite * 44,424 98 Paved Parking & Roofs, New Work 118,498 74 >75% Grass cover, Good, HSG C * 36,180 98 Paved Parking & Roofs, Existing On Site 2,546,726 86 Weighted Average 1,282,741 50.37% Pervious Area 1,263,985 49.63% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Roof 48.1 2,600 0.0036 0.90 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 53.1 2,600 Total Subcatchment 1S: Storm Runoff Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)4 3 2 1 0 Indy Huff 24-hr 2yr-06hr Rainfall=1.98" Runoff Area=2,546,726 sf Runoff Volume=176,974 cf Runoff Depth=0.83" Flow Length=2,600' Slope=0.0036 '/' Tc=53.1 min CN=86 4.34 cfs Indy Huff 24-hr 2yr-06hr Rainfall=1.98"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 12HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Pond 1P: Detention Pond Inflow Area = 2,546,726 sf, 49.63% Impervious, Inflow Depth = 0.83" for 2yr-06hr event Inflow = 4.34 cfs @ 11.75 hrs, Volume= 176,974 cf Outflow = 4.10 cfs @ 12.68 hrs, Volume= 175,823 cf, Atten= 6%, Lag= 56.1 min Primary = 4.10 cfs @ 12.68 hrs, Volume= 175,823 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Peak Elev= 882.80' @ 12.68 hrs Surf.Area= 25,912 sf Storage= 25,775 cf Plug-Flow detention time= 138.7 min calculated for 175,823 cf (99% of inflow) Center-of-Mass det. time= 134.6 min ( 1,014.3 - 879.7 ) Volume Invert Avail.Storage Storage Description #1 881.68' 132,713 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 881.68 21,378 0 0 882.00 21,544 6,868 6,868 883.00 27,026 24,285 31,153 884.00 39,955 33,491 64,643 885.00 96,185 68,070 132,713 Device Routing Invert Outlet Devices #1 Primary 881.68'24.0" Round CMP_Round 24" L= 98.0' Ke= 0.500 Inlet / Outlet Invert= 881.68' / 880.82' S= 0.0088 '/' Cc= 0.900 n= 0.025, Flow Area= 3.14 sf #2 Secondary 884.50'100.0' long Broad-Crested Rectangular Weir Head (feet) 0.50 Coef. (English) 3.07 Primary OutFlow Max=4.10 cfs @ 12.68 hrs HW=882.80' (Free Discharge) 1=CMP_Round 24" (Barrel Controls 4.10 cfs @ 3.28 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=881.68' (Free Discharge) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Indy Huff 24-hr 2yr-06hr Rainfall=1.98"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 13HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Pond 1P: Detention Pond Inflow Outflow Primary Secondary Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)4 3 2 1 0 Inflow Area=2,546,726 sf Peak Elev=882.80' Storage=25,775 cf 4.34 cfs 4.10 cfs 4.10 cfs 0.00 cfs Indy Huff 24-hr 2yr-12hr Rainfall=2.40"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 14HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Storm Runoff = 5.99 cfs @ 11.50 hrs, Volume= 246,672 cf, Depth= 1.16" Routed to Pond 1P : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Indy Huff 24-hr 2yr-12hr Rainfall=2.40" Area (sf) CN Description * 1,183,381 98 Paved Parking & Roofs Offsite * 1,164,243 74 >75% Grass Cover, Offsite * 44,424 98 Paved Parking & Roofs, New Work 118,498 74 >75% Grass cover, Good, HSG C * 36,180 98 Paved Parking & Roofs, Existing On Site 2,546,726 86 Weighted Average 1,282,741 50.37% Pervious Area 1,263,985 49.63% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Roof 48.1 2,600 0.0036 0.90 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 53.1 2,600 Total Subcatchment 1S: Storm Runoff Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)6 5 4 3 2 1 0 Indy Huff 24-hr 2yr-12hr Rainfall=2.40" Runoff Area=2,546,726 sf Runoff Volume=246,672 cf Runoff Depth=1.16" Flow Length=2,600' Slope=0.0036 '/' Tc=53.1 min CN=86 5.99 cfs Indy Huff 24-hr 2yr-12hr Rainfall=2.40"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 15HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Pond 1P: Detention Pond Inflow Area = 2,546,726 sf, 49.63% Impervious, Inflow Depth = 1.16" for 2yr-12hr event Inflow = 5.99 cfs @ 11.50 hrs, Volume= 246,672 cf Outflow = 5.73 cfs @ 12.44 hrs, Volume= 245,511 cf, Atten= 4%, Lag= 56.6 min Primary = 5.73 cfs @ 12.44 hrs, Volume= 245,511 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Peak Elev= 883.03' @ 12.44 hrs Surf.Area= 27,404 sf Storage= 31,948 cf Plug-Flow detention time= 120.7 min calculated for 245,511 cf (100% of inflow) Center-of-Mass det. time= 117.6 min ( 976.4 - 858.8 ) Volume Invert Avail.Storage Storage Description #1 881.68' 132,713 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 881.68 21,378 0 0 882.00 21,544 6,868 6,868 883.00 27,026 24,285 31,153 884.00 39,955 33,491 64,643 885.00 96,185 68,070 132,713 Device Routing Invert Outlet Devices #1 Primary 881.68'24.0" Round CMP_Round 24" L= 98.0' Ke= 0.500 Inlet / Outlet Invert= 881.68' / 880.82' S= 0.0088 '/' Cc= 0.900 n= 0.025, Flow Area= 3.14 sf #2 Secondary 884.50'100.0' long Broad-Crested Rectangular Weir Head (feet) 0.50 Coef. (English) 3.07 Primary OutFlow Max=5.73 cfs @ 12.44 hrs HW=883.03' (Free Discharge) 1=CMP_Round 24" (Barrel Controls 5.73 cfs @ 3.59 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=881.68' (Free Discharge) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Indy Huff 24-hr 2yr-12hr Rainfall=2.40"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 16HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Pond 1P: Detention Pond Inflow Outflow Primary Secondary Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)6 5 4 3 2 1 0 Inflow Area=2,546,726 sf Peak Elev=883.03' Storage=31,948 cf 5.99 cfs 5.73 cfs 5.73 cfs 0.00 cfs Indy Huff 24-hr 2yr-24hr Rainfall=2.64"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 17HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Storm Runoff = 6.96 cfs @ 11.50 hrs, Volume= 288,358 cf, Depth= 1.36" Routed to Pond 1P : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Indy Huff 24-hr 2yr-24hr Rainfall=2.64" Area (sf) CN Description * 1,183,381 98 Paved Parking & Roofs Offsite * 1,164,243 74 >75% Grass Cover, Offsite * 44,424 98 Paved Parking & Roofs, New Work 118,498 74 >75% Grass cover, Good, HSG C * 36,180 98 Paved Parking & Roofs, Existing On Site 2,546,726 86 Weighted Average 1,282,741 50.37% Pervious Area 1,263,985 49.63% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Roof 48.1 2,600 0.0036 0.90 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 53.1 2,600 Total Subcatchment 1S: Storm Runoff Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)7 6 5 4 3 2 1 0 Indy Huff 24-hr 2yr-24hr Rainfall=2.64" Runoff Area=2,546,726 sf Runoff Volume=288,358 cf Runoff Depth=1.36" Flow Length=2,600' Slope=0.0036 '/' Tc=53.1 min CN=86 6.96 cfs Indy Huff 24-hr 2yr-24hr Rainfall=2.64"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 18HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Pond 1P: Detention Pond Inflow Area = 2,546,726 sf, 49.63% Impervious, Inflow Depth = 1.36" for 2yr-24hr event Inflow = 6.96 cfs @ 11.50 hrs, Volume= 288,358 cf Outflow = 6.68 cfs @ 12.35 hrs, Volume= 287,193 cf, Atten= 4%, Lag= 50.7 min Primary = 6.68 cfs @ 12.35 hrs, Volume= 287,193 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Peak Elev= 883.16' @ 12.35 hrs Surf.Area= 29,057 sf Storage= 35,558 cf Plug-Flow detention time= 112.0 min calculated for 286,954 cf (100% of inflow) Center-of-Mass det. time= 110.8 min ( 960.0 - 849.2 ) Volume Invert Avail.Storage Storage Description #1 881.68' 132,713 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 881.68 21,378 0 0 882.00 21,544 6,868 6,868 883.00 27,026 24,285 31,153 884.00 39,955 33,491 64,643 885.00 96,185 68,070 132,713 Device Routing Invert Outlet Devices #1 Primary 881.68'24.0" Round CMP_Round 24" L= 98.0' Ke= 0.500 Inlet / Outlet Invert= 881.68' / 880.82' S= 0.0088 '/' Cc= 0.900 n= 0.025, Flow Area= 3.14 sf #2 Secondary 884.50'100.0' long Broad-Crested Rectangular Weir Head (feet) 0.50 Coef. (English) 3.07 Primary OutFlow Max=6.68 cfs @ 12.35 hrs HW=883.16' (Free Discharge) 1=CMP_Round 24" (Barrel Controls 6.68 cfs @ 3.74 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=881.68' (Free Discharge) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Indy Huff 24-hr 2yr-24hr Rainfall=2.64"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 19HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Pond 1P: Detention Pond Inflow Outflow Primary Secondary Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)7 6 5 4 3 2 1 0 Inflow Area=2,546,726 sf Peak Elev=883.16' Storage=35,558 cf 6.96 cfs 6.68 cfs 6.68 cfs 0.00 cfs Indy Huff 24-hr 10yr-01hr Rainfall=1.96"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 20HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Storm Runoff = 4.27 cfs @ 11.74 hrs, Volume= 173,780 cf, Depth= 0.82" Routed to Pond 1P : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Indy Huff 24-hr 10yr-01hr Rainfall=1.96" Area (sf) CN Description * 1,183,381 98 Paved Parking & Roofs Offsite * 1,164,243 74 >75% Grass Cover, Offsite * 44,424 98 Paved Parking & Roofs, New Work 118,498 74 >75% Grass cover, Good, HSG C * 36,180 98 Paved Parking & Roofs, Existing On Site 2,546,726 86 Weighted Average 1,282,741 50.37% Pervious Area 1,263,985 49.63% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Roof 48.1 2,600 0.0036 0.90 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 53.1 2,600 Total Subcatchment 1S: Storm Runoff Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)4 3 2 1 0 Indy Huff 24-hr 10yr-01hr Rainfall=1.96" Runoff Area=2,546,726 sf Runoff Volume=173,780 cf Runoff Depth=0.82" Flow Length=2,600' Slope=0.0036 '/' Tc=53.1 min CN=86 4.27 cfs Indy Huff 24-hr 10yr-01hr Rainfall=1.96"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 21HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Pond 1P: Detention Pond Inflow Area = 2,546,726 sf, 49.63% Impervious, Inflow Depth = 0.82" for 10yr-01hr event Inflow = 4.27 cfs @ 11.74 hrs, Volume= 173,780 cf Outflow = 4.02 cfs @ 12.70 hrs, Volume= 172,630 cf, Atten= 6%, Lag= 57.7 min Primary = 4.02 cfs @ 12.70 hrs, Volume= 172,630 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Peak Elev= 882.79' @ 12.70 hrs Surf.Area= 25,850 sf Storage= 25,479 cf Plug-Flow detention time= 139.8 min calculated for 172,630 cf (99% of inflow) Center-of-Mass det. time= 135.7 min ( 1,016.5 - 880.9 ) Volume Invert Avail.Storage Storage Description #1 881.68' 132,713 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 881.68 21,378 0 0 882.00 21,544 6,868 6,868 883.00 27,026 24,285 31,153 884.00 39,955 33,491 64,643 885.00 96,185 68,070 132,713 Device Routing Invert Outlet Devices #1 Primary 881.68'24.0" Round CMP_Round 24" L= 98.0' Ke= 0.500 Inlet / Outlet Invert= 881.68' / 880.82' S= 0.0088 '/' Cc= 0.900 n= 0.025, Flow Area= 3.14 sf #2 Secondary 884.50'100.0' long Broad-Crested Rectangular Weir Head (feet) 0.50 Coef. (English) 3.07 Primary OutFlow Max=4.02 cfs @ 12.70 hrs HW=882.79' (Free Discharge) 1=CMP_Round 24" (Barrel Controls 4.02 cfs @ 3.27 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=881.68' (Free Discharge) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Indy Huff 24-hr 10yr-01hr Rainfall=1.96"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 22HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Pond 1P: Detention Pond Inflow Outflow Primary Secondary Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)4 3 2 1 0 Inflow Area=2,546,726 sf Peak Elev=882.79' Storage=25,479 cf 4.27 cfs 4.02 cfs 4.02 cfs 0.00 cfs Indy Huff 24-hr 10yr-02hr Rainfall=2.40"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 23HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Storm Runoff = 5.99 cfs @ 11.50 hrs, Volume= 246,672 cf, Depth= 1.16" Routed to Pond 1P : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Indy Huff 24-hr 10yr-02hr Rainfall=2.40" Area (sf) CN Description * 1,183,381 98 Paved Parking & Roofs Offsite * 1,164,243 74 >75% Grass Cover, Offsite * 44,424 98 Paved Parking & Roofs, New Work 118,498 74 >75% Grass cover, Good, HSG C * 36,180 98 Paved Parking & Roofs, Existing On Site 2,546,726 86 Weighted Average 1,282,741 50.37% Pervious Area 1,263,985 49.63% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Roof 48.1 2,600 0.0036 0.90 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 53.1 2,600 Total Subcatchment 1S: Storm Runoff Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)6 5 4 3 2 1 0 Indy Huff 24-hr 10yr-02hr Rainfall=2.40" Runoff Area=2,546,726 sf Runoff Volume=246,672 cf Runoff Depth=1.16" Flow Length=2,600' Slope=0.0036 '/' Tc=53.1 min CN=86 5.99 cfs Indy Huff 24-hr 10yr-02hr Rainfall=2.40"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 24HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Pond 1P: Detention Pond Inflow Area = 2,546,726 sf, 49.63% Impervious, Inflow Depth = 1.16" for 10yr-02hr event Inflow = 5.99 cfs @ 11.50 hrs, Volume= 246,672 cf Outflow = 5.73 cfs @ 12.44 hrs, Volume= 245,511 cf, Atten= 4%, Lag= 56.6 min Primary = 5.73 cfs @ 12.44 hrs, Volume= 245,511 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Peak Elev= 883.03' @ 12.44 hrs Surf.Area= 27,404 sf Storage= 31,948 cf Plug-Flow detention time= 120.7 min calculated for 245,511 cf (100% of inflow) Center-of-Mass det. time= 117.6 min ( 976.4 - 858.8 ) Volume Invert Avail.Storage Storage Description #1 881.68' 132,713 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 881.68 21,378 0 0 882.00 21,544 6,868 6,868 883.00 27,026 24,285 31,153 884.00 39,955 33,491 64,643 885.00 96,185 68,070 132,713 Device Routing Invert Outlet Devices #1 Primary 881.68'24.0" Round CMP_Round 24" L= 98.0' Ke= 0.500 Inlet / Outlet Invert= 881.68' / 880.82' S= 0.0088 '/' Cc= 0.900 n= 0.025, Flow Area= 3.14 sf #2 Secondary 884.50'100.0' long Broad-Crested Rectangular Weir Head (feet) 0.50 Coef. (English) 3.07 Primary OutFlow Max=5.73 cfs @ 12.44 hrs HW=883.03' (Free Discharge) 1=CMP_Round 24" (Barrel Controls 5.73 cfs @ 3.59 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=881.68' (Free Discharge) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Indy Huff 24-hr 10yr-02hr Rainfall=2.40"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 25HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Pond 1P: Detention Pond Inflow Outflow Primary Secondary Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)6 5 4 3 2 1 0 Inflow Area=2,546,726 sf Peak Elev=883.03' Storage=31,948 cf 5.99 cfs 5.73 cfs 5.73 cfs 0.00 cfs Indy Huff 24-hr 10yr-03hr Rainfall=2.64"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 26HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Storm Runoff = 6.96 cfs @ 11.50 hrs, Volume= 288,358 cf, Depth= 1.36" Routed to Pond 1P : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Indy Huff 24-hr 10yr-03hr Rainfall=2.64" Area (sf) CN Description * 1,183,381 98 Paved Parking & Roofs Offsite * 1,164,243 74 >75% Grass Cover, Offsite * 44,424 98 Paved Parking & Roofs, New Work 118,498 74 >75% Grass cover, Good, HSG C * 36,180 98 Paved Parking & Roofs, Existing On Site 2,546,726 86 Weighted Average 1,282,741 50.37% Pervious Area 1,263,985 49.63% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Roof 48.1 2,600 0.0036 0.90 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 53.1 2,600 Total Subcatchment 1S: Storm Runoff Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)7 6 5 4 3 2 1 0 Indy Huff 24-hr 10yr-03hr Rainfall=2.64" Runoff Area=2,546,726 sf Runoff Volume=288,358 cf Runoff Depth=1.36" Flow Length=2,600' Slope=0.0036 '/' Tc=53.1 min CN=86 6.96 cfs Indy Huff 24-hr 10yr-03hr Rainfall=2.64"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 27HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Pond 1P: Detention Pond Inflow Area = 2,546,726 sf, 49.63% Impervious, Inflow Depth = 1.36" for 10yr-03hr event Inflow = 6.96 cfs @ 11.50 hrs, Volume= 288,358 cf Outflow = 6.68 cfs @ 12.35 hrs, Volume= 287,193 cf, Atten= 4%, Lag= 50.7 min Primary = 6.68 cfs @ 12.35 hrs, Volume= 287,193 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Peak Elev= 883.16' @ 12.35 hrs Surf.Area= 29,057 sf Storage= 35,558 cf Plug-Flow detention time= 112.0 min calculated for 286,954 cf (100% of inflow) Center-of-Mass det. time= 110.8 min ( 960.0 - 849.2 ) Volume Invert Avail.Storage Storage Description #1 881.68' 132,713 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 881.68 21,378 0 0 882.00 21,544 6,868 6,868 883.00 27,026 24,285 31,153 884.00 39,955 33,491 64,643 885.00 96,185 68,070 132,713 Device Routing Invert Outlet Devices #1 Primary 881.68'24.0" Round CMP_Round 24" L= 98.0' Ke= 0.500 Inlet / Outlet Invert= 881.68' / 880.82' S= 0.0088 '/' Cc= 0.900 n= 0.025, Flow Area= 3.14 sf #2 Secondary 884.50'100.0' long Broad-Crested Rectangular Weir Head (feet) 0.50 Coef. (English) 3.07 Primary OutFlow Max=6.68 cfs @ 12.35 hrs HW=883.16' (Free Discharge) 1=CMP_Round 24" (Barrel Controls 6.68 cfs @ 3.74 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=881.68' (Free Discharge) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Indy Huff 24-hr 10yr-03hr Rainfall=2.64"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 28HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Pond 1P: Detention Pond Inflow Outflow Primary Secondary Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)7 6 5 4 3 2 1 0 Inflow Area=2,546,726 sf Peak Elev=883.16' Storage=35,558 cf 6.96 cfs 6.68 cfs 6.68 cfs 0.00 cfs Indy Huff 24-hr 10yr-06hr Rainfall=3.12"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 29HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Storm Runoff = 8.94 cfs @ 11.50 hrs, Volume= 374,743 cf, Depth= 1.77" Routed to Pond 1P : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Indy Huff 24-hr 10yr-06hr Rainfall=3.12" Area (sf) CN Description * 1,183,381 98 Paved Parking & Roofs Offsite * 1,164,243 74 >75% Grass Cover, Offsite * 44,424 98 Paved Parking & Roofs, New Work 118,498 74 >75% Grass cover, Good, HSG C * 36,180 98 Paved Parking & Roofs, Existing On Site 2,546,726 86 Weighted Average 1,282,741 50.37% Pervious Area 1,263,985 49.63% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Roof 48.1 2,600 0.0036 0.90 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 53.1 2,600 Total Subcatchment 1S: Storm Runoff Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)10 9 8 7 6 5 4 3 2 1 0 Indy Huff 24-hr 10yr-06hr Rainfall=3.12" Runoff Area=2,546,726 sf Runoff Volume=374,743 cf Runoff Depth=1.77" Flow Length=2,600' Slope=0.0036 '/' Tc=53.1 min CN=86 8.94 cfs Indy Huff 24-hr 10yr-06hr Rainfall=3.12"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 30HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Pond 1P: Detention Pond Inflow Area = 2,546,726 sf, 49.63% Impervious, Inflow Depth = 1.77" for 10yr-06hr event Inflow = 8.94 cfs @ 11.50 hrs, Volume= 374,743 cf Outflow = 8.60 cfs @ 12.23 hrs, Volume= 373,571 cf, Atten= 4%, Lag= 43.8 min Primary = 8.60 cfs @ 12.23 hrs, Volume= 373,571 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Peak Elev= 883.41' @ 12.23 hrs Surf.Area= 32,335 sf Storage= 43,341 cf Plug-Flow detention time= 102.0 min calculated for 373,260 cf (100% of inflow) Center-of-Mass det. time= 101.3 min ( 934.7 - 833.4 ) Volume Invert Avail.Storage Storage Description #1 881.68' 132,713 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 881.68 21,378 0 0 882.00 21,544 6,868 6,868 883.00 27,026 24,285 31,153 884.00 39,955 33,491 64,643 885.00 96,185 68,070 132,713 Device Routing Invert Outlet Devices #1 Primary 881.68'24.0" Round CMP_Round 24" L= 98.0' Ke= 0.500 Inlet / Outlet Invert= 881.68' / 880.82' S= 0.0088 '/' Cc= 0.900 n= 0.025, Flow Area= 3.14 sf #2 Secondary 884.50'100.0' long Broad-Crested Rectangular Weir Head (feet) 0.50 Coef. (English) 3.07 Primary OutFlow Max=8.60 cfs @ 12.23 hrs HW=883.41' (Free Discharge) 1=CMP_Round 24" (Barrel Controls 8.60 cfs @ 3.99 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=881.68' (Free Discharge) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Indy Huff 24-hr 10yr-06hr Rainfall=3.12"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 31HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Pond 1P: Detention Pond Inflow Outflow Primary Secondary Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)10 9 8 7 6 5 4 3 2 1 0 Inflow Area=2,546,726 sf Peak Elev=883.41' Storage=43,341 cf 8.94 cfs 8.60 cfs 8.60 cfs 0.00 cfs Indy Huff 24-hr 10yr-12hr Rainfall=3.60"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 32HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Storm Runoff = 10.96 cfs @ 11.40 hrs, Volume= 464,159 cf, Depth= 2.19" Routed to Pond 1P : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Indy Huff 24-hr 10yr-12hr Rainfall=3.60" Area (sf) CN Description * 1,183,381 98 Paved Parking & Roofs Offsite * 1,164,243 74 >75% Grass Cover, Offsite * 44,424 98 Paved Parking & Roofs, New Work 118,498 74 >75% Grass cover, Good, HSG C * 36,180 98 Paved Parking & Roofs, Existing On Site 2,546,726 86 Weighted Average 1,282,741 50.37% Pervious Area 1,263,985 49.63% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Roof 48.1 2,600 0.0036 0.90 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 53.1 2,600 Total Subcatchment 1S: Storm Runoff Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)12 11 10 9 8 7 6 5 4 3 2 1 0 Indy Huff 24-hr 10yr-12hr Rainfall=3.60" Runoff Area=2,546,726 sf Runoff Volume=464,159 cf Runoff Depth=2.19" Flow Length=2,600' Slope=0.0036 '/' Tc=53.1 min CN=86 10.96 cfs Indy Huff 24-hr 10yr-12hr Rainfall=3.60"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 33HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Pond 1P: Detention Pond Inflow Area = 2,546,726 sf, 49.63% Impervious, Inflow Depth = 2.19" for 10yr-12hr event Inflow = 10.96 cfs @ 11.40 hrs, Volume= 464,159 cf Outflow = 10.51 cfs @ 12.18 hrs, Volume= 462,982 cf, Atten= 4%, Lag= 47.3 min Primary = 10.51 cfs @ 12.18 hrs, Volume= 462,982 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Peak Elev= 883.67' @ 12.18 hrs Surf.Area= 35,731 sf Storage= 52,279 cf Plug-Flow detention time= 95.9 min calculated for 462,596 cf (100% of inflow) Center-of-Mass det. time= 95.6 min ( 916.5 - 820.9 ) Volume Invert Avail.Storage Storage Description #1 881.68' 132,713 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 881.68 21,378 0 0 882.00 21,544 6,868 6,868 883.00 27,026 24,285 31,153 884.00 39,955 33,491 64,643 885.00 96,185 68,070 132,713 Device Routing Invert Outlet Devices #1 Primary 881.68'24.0" Round CMP_Round 24" L= 98.0' Ke= 0.500 Inlet / Outlet Invert= 881.68' / 880.82' S= 0.0088 '/' Cc= 0.900 n= 0.025, Flow Area= 3.14 sf #2 Secondary 884.50'100.0' long Broad-Crested Rectangular Weir Head (feet) 0.50 Coef. (English) 3.07 Primary OutFlow Max=10.51 cfs @ 12.18 hrs HW=883.67' (Free Discharge) 1=CMP_Round 24" (Barrel Controls 10.51 cfs @ 4.17 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=881.68' (Free Discharge) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Indy Huff 24-hr 10yr-12hr Rainfall=3.60"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 34HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Pond 1P: Detention Pond Inflow Outflow Primary Secondary Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=2,546,726 sf Peak Elev=883.67' Storage=52,279 cf 10.96 cfs 10.51 cfs 10.51 cfs 0.00 cfs Indy Huff 24-hr 10yr-24hr Rainfall=4.08"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 35HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Storm Runoff = 12.99 cfs @ 11.39 hrs, Volume= 555,797 cf, Depth= 2.62" Routed to Pond 1P : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Indy Huff 24-hr 10yr-24hr Rainfall=4.08" Area (sf) CN Description * 1,183,381 98 Paved Parking & Roofs Offsite * 1,164,243 74 >75% Grass Cover, Offsite * 44,424 98 Paved Parking & Roofs, New Work 118,498 74 >75% Grass cover, Good, HSG C * 36,180 98 Paved Parking & Roofs, Existing On Site 2,546,726 86 Weighted Average 1,282,741 50.37% Pervious Area 1,263,985 49.63% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Roof 48.1 2,600 0.0036 0.90 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 53.1 2,600 Total Subcatchment 1S: Storm Runoff Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Indy Huff 24-hr 10yr-24hr Rainfall=4.08" Runoff Area=2,546,726 sf Runoff Volume=555,797 cf Runoff Depth=2.62" Flow Length=2,600' Slope=0.0036 '/' Tc=53.1 min CN=86 12.99 cfs Indy Huff 24-hr 10yr-24hr Rainfall=4.08"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 36HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Pond 1P: Detention Pond Inflow Area = 2,546,726 sf, 49.63% Impervious, Inflow Depth = 2.62" for 10yr-24hr event Inflow = 12.99 cfs @ 11.39 hrs, Volume= 555,797 cf Outflow = 12.33 cfs @ 12.25 hrs, Volume= 554,615 cf, Atten= 5%, Lag= 51.9 min Primary = 12.33 cfs @ 12.25 hrs, Volume= 554,615 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Peak Elev= 883.97' @ 12.25 hrs Surf.Area= 39,554 sf Storage= 63,410 cf Plug-Flow detention time= 94.3 min calculated for 554,615 cf (100% of inflow) Center-of-Mass det. time= 92.7 min ( 903.4 - 810.7 ) Volume Invert Avail.Storage Storage Description #1 881.68' 132,713 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 881.68 21,378 0 0 882.00 21,544 6,868 6,868 883.00 27,026 24,285 31,153 884.00 39,955 33,491 64,643 885.00 96,185 68,070 132,713 Device Routing Invert Outlet Devices #1 Primary 881.68'24.0" Round CMP_Round 24" L= 98.0' Ke= 0.500 Inlet / Outlet Invert= 881.68' / 880.82' S= 0.0088 '/' Cc= 0.900 n= 0.025, Flow Area= 3.14 sf #2 Secondary 884.50'100.0' long Broad-Crested Rectangular Weir Head (feet) 0.50 Coef. (English) 3.07 Primary OutFlow Max=12.33 cfs @ 12.25 hrs HW=883.97' (Free Discharge) 1=CMP_Round 24" (Barrel Controls 12.33 cfs @ 4.30 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=881.68' (Free Discharge) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Indy Huff 24-hr 10yr-24hr Rainfall=4.08"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 37HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Pond 1P: Detention Pond Inflow Outflow Primary Secondary Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=2,546,726 sf Peak Elev=883.97' Storage=63,410 cf 12.99 cfs 12.33 cfs 12.33 cfs 0.00 cfs Indy Huff 24-hr 100yr-1hr Rainfall=2.88"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 38HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Storm Runoff = 7.95 cfs @ 11.50 hrs, Volume= 331,106 cf, Depth= 1.56" Routed to Pond 1P : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Indy Huff 24-hr 100yr-1hr Rainfall=2.88" Area (sf) CN Description * 1,183,381 98 Paved Parking & Roofs Offsite * 1,164,243 74 >75% Grass Cover, Offsite * 44,424 98 Paved Parking & Roofs, New Work 118,498 74 >75% Grass cover, Good, HSG C * 36,180 98 Paved Parking & Roofs, Existing On Site 2,546,726 86 Weighted Average 1,282,741 50.37% Pervious Area 1,263,985 49.63% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Roof 48.1 2,600 0.0036 0.90 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 53.1 2,600 Total Subcatchment 1S: Storm Runoff Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)8 7 6 5 4 3 2 1 0 Indy Huff 24-hr 100yr-1hr Rainfall=2.88" Runoff Area=2,546,726 sf Runoff Volume=331,106 cf Runoff Depth=1.56" Flow Length=2,600' Slope=0.0036 '/' Tc=53.1 min CN=86 7.95 cfs Indy Huff 24-hr 100yr-1hr Rainfall=2.88"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 39HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Pond 1P: Detention Pond Inflow Area = 2,546,726 sf, 49.63% Impervious, Inflow Depth = 1.56" for 100yr-1hr event Inflow = 7.95 cfs @ 11.50 hrs, Volume= 331,106 cf Outflow = 7.64 cfs @ 12.28 hrs, Volume= 329,937 cf, Atten= 4%, Lag= 46.8 min Primary = 7.64 cfs @ 12.28 hrs, Volume= 329,937 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Peak Elev= 883.28' @ 12.28 hrs Surf.Area= 30,693 sf Storage= 39,338 cf Plug-Flow detention time= 106.4 min calculated for 329,663 cf (100% of inflow) Center-of-Mass det. time= 105.5 min ( 946.3 - 840.8 ) Volume Invert Avail.Storage Storage Description #1 881.68' 132,713 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 881.68 21,378 0 0 882.00 21,544 6,868 6,868 883.00 27,026 24,285 31,153 884.00 39,955 33,491 64,643 885.00 96,185 68,070 132,713 Device Routing Invert Outlet Devices #1 Primary 881.68'24.0" Round CMP_Round 24" L= 98.0' Ke= 0.500 Inlet / Outlet Invert= 881.68' / 880.82' S= 0.0088 '/' Cc= 0.900 n= 0.025, Flow Area= 3.14 sf #2 Secondary 884.50'100.0' long Broad-Crested Rectangular Weir Head (feet) 0.50 Coef. (English) 3.07 Primary OutFlow Max=7.64 cfs @ 12.28 hrs HW=883.28' (Free Discharge) 1=CMP_Round 24" (Barrel Controls 7.64 cfs @ 3.87 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=881.68' (Free Discharge) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Indy Huff 24-hr 100yr-1hr Rainfall=2.88"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 40HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Pond 1P: Detention Pond Inflow Outflow Primary Secondary Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)8 7 6 5 4 3 2 1 0 Inflow Area=2,546,726 sf Peak Elev=883.28' Storage=39,338 cf 7.95 cfs 7.64 cfs 7.64 cfs 0.00 cfs Indy Huff 24-hr 100yr-2hr Rainfall=3.50"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 41HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Storm Runoff = 10.54 cfs @ 11.40 hrs, Volume= 445,326 cf, Depth= 2.10" Routed to Pond 1P : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Indy Huff 24-hr 100yr-2hr Rainfall=3.50" Area (sf) CN Description * 1,183,381 98 Paved Parking & Roofs Offsite * 1,164,243 74 >75% Grass Cover, Offsite * 44,424 98 Paved Parking & Roofs, New Work 118,498 74 >75% Grass cover, Good, HSG C * 36,180 98 Paved Parking & Roofs, Existing On Site 2,546,726 86 Weighted Average 1,282,741 50.37% Pervious Area 1,263,985 49.63% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Roof 48.1 2,600 0.0036 0.90 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 53.1 2,600 Total Subcatchment 1S: Storm Runoff Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)11 10 9 8 7 6 5 4 3 2 1 0 Indy Huff 24-hr 100yr-2hr Rainfall=3.50" Runoff Area=2,546,726 sf Runoff Volume=445,326 cf Runoff Depth=2.10" Flow Length=2,600' Slope=0.0036 '/' Tc=53.1 min CN=86 10.54 cfs Indy Huff 24-hr 100yr-2hr Rainfall=3.50"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 42HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Pond 1P: Detention Pond Inflow Area = 2,546,726 sf, 49.63% Impervious, Inflow Depth = 2.10" for 100yr-2hr event Inflow = 10.54 cfs @ 11.40 hrs, Volume= 445,326 cf Outflow = 10.12 cfs @ 12.19 hrs, Volume= 444,149 cf, Atten= 4%, Lag= 47.3 min Primary = 10.12 cfs @ 12.19 hrs, Volume= 444,149 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Peak Elev= 883.62' @ 12.19 hrs Surf.Area= 35,003 sf Storage= 50,288 cf Plug-Flow detention time= 96.9 min calculated for 443,779 cf (100% of inflow) Center-of-Mass det. time= 96.5 min ( 919.8 - 823.3 ) Volume Invert Avail.Storage Storage Description #1 881.68' 132,713 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 881.68 21,378 0 0 882.00 21,544 6,868 6,868 883.00 27,026 24,285 31,153 884.00 39,955 33,491 64,643 885.00 96,185 68,070 132,713 Device Routing Invert Outlet Devices #1 Primary 881.68'24.0" Round CMP_Round 24" L= 98.0' Ke= 0.500 Inlet / Outlet Invert= 881.68' / 880.82' S= 0.0088 '/' Cc= 0.900 n= 0.025, Flow Area= 3.14 sf #2 Secondary 884.50'100.0' long Broad-Crested Rectangular Weir Head (feet) 0.50 Coef. (English) 3.07 Primary OutFlow Max=10.12 cfs @ 12.19 hrs HW=883.62' (Free Discharge) 1=CMP_Round 24" (Barrel Controls 10.12 cfs @ 4.14 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=881.68' (Free Discharge) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Indy Huff 24-hr 100yr-2hr Rainfall=3.50"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 43HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Pond 1P: Detention Pond Inflow Outflow Primary Secondary Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=2,546,726 sf Peak Elev=883.62' Storage=50,288 cf 10.54 cfs 10.12 cfs 10.12 cfs 0.00 cfs Indy Huff 24-hr 100yr-3hr Rainfall=3.87"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 44HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Storm Runoff = 12.10 cfs @ 11.39 hrs, Volume= 515,472 cf, Depth= 2.43" Routed to Pond 1P : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Indy Huff 24-hr 100yr-3hr Rainfall=3.87" Area (sf) CN Description * 1,183,381 98 Paved Parking & Roofs Offsite * 1,164,243 74 >75% Grass Cover, Offsite * 44,424 98 Paved Parking & Roofs, New Work 118,498 74 >75% Grass cover, Good, HSG C * 36,180 98 Paved Parking & Roofs, Existing On Site 2,546,726 86 Weighted Average 1,282,741 50.37% Pervious Area 1,263,985 49.63% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Roof 48.1 2,600 0.0036 0.90 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 53.1 2,600 Total Subcatchment 1S: Storm Runoff Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)13 12 11 10 9 8 7 6 5 4 3 2 1 0 Indy Huff 24-hr 100yr-3hr Rainfall=3.87" Runoff Area=2,546,726 sf Runoff Volume=515,472 cf Runoff Depth=2.43" Flow Length=2,600' Slope=0.0036 '/' Tc=53.1 min CN=86 12.10 cfs Indy Huff 24-hr 100yr-3hr Rainfall=3.87"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 45HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Pond 1P: Detention Pond Inflow Area = 2,546,726 sf, 49.63% Impervious, Inflow Depth = 2.43" for 100yr-3hr event Inflow = 12.10 cfs @ 11.39 hrs, Volume= 515,472 cf Outflow = 11.56 cfs @ 12.20 hrs, Volume= 514,292 cf, Atten= 4%, Lag= 48.7 min Primary = 11.56 cfs @ 12.20 hrs, Volume= 514,292 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Peak Elev= 883.83' @ 12.20 hrs Surf.Area= 37,793 sf Storage= 58,142 cf Plug-Flow detention time= 95.2 min calculated for 514,292 cf (100% of inflow) Center-of-Mass det. time= 93.6 min ( 908.5 - 814.9 ) Volume Invert Avail.Storage Storage Description #1 881.68' 132,713 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 881.68 21,378 0 0 882.00 21,544 6,868 6,868 883.00 27,026 24,285 31,153 884.00 39,955 33,491 64,643 885.00 96,185 68,070 132,713 Device Routing Invert Outlet Devices #1 Primary 881.68'24.0" Round CMP_Round 24" L= 98.0' Ke= 0.500 Inlet / Outlet Invert= 881.68' / 880.82' S= 0.0088 '/' Cc= 0.900 n= 0.025, Flow Area= 3.14 sf #2 Secondary 884.50'100.0' long Broad-Crested Rectangular Weir Head (feet) 0.50 Coef. (English) 3.07 Primary OutFlow Max=11.56 cfs @ 12.20 hrs HW=883.83' (Free Discharge) 1=CMP_Round 24" (Barrel Controls 11.56 cfs @ 4.25 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=881.68' (Free Discharge) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Indy Huff 24-hr 100yr-3hr Rainfall=3.87"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 46HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Pond 1P: Detention Pond Inflow Outflow Primary Secondary Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)13 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=2,546,726 sf Peak Elev=883.83' Storage=58,142 cf 12.10 cfs 11.56 cfs 11.56 cfs 0.00 cfs Indy Huff 24-hr 100yr-6hr Rainfall=4.50"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 47HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Storm Runoff = 14.77 cfs @ 11.27 hrs, Volume= 637,369 cf, Depth= 3.00" Routed to Pond 1P : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Indy Huff 24-hr 100yr-6hr Rainfall=4.50" Area (sf) CN Description * 1,183,381 98 Paved Parking & Roofs Offsite * 1,164,243 74 >75% Grass Cover, Offsite * 44,424 98 Paved Parking & Roofs, New Work 118,498 74 >75% Grass cover, Good, HSG C * 36,180 98 Paved Parking & Roofs, Existing On Site 2,546,726 86 Weighted Average 1,282,741 50.37% Pervious Area 1,263,985 49.63% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Roof 48.1 2,600 0.0036 0.90 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 53.1 2,600 Total Subcatchment 1S: Storm Runoff Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Indy Huff 24-hr 100yr-6hr Rainfall=4.50" Runoff Area=2,546,726 sf Runoff Volume=637,369 cf Runoff Depth=3.00" Flow Length=2,600' Slope=0.0036 '/' Tc=53.1 min CN=86 14.77 cfs Indy Huff 24-hr 100yr-6hr Rainfall=4.50"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 48HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Pond 1P: Detention Pond Inflow Area = 2,546,726 sf, 49.63% Impervious, Inflow Depth = 3.00" for 100yr-6hr event Inflow = 14.77 cfs @ 11.27 hrs, Volume= 637,369 cf Outflow = 13.20 cfs @ 11.69 hrs, Volume= 636,183 cf, Atten= 11%, Lag= 25.0 min Primary = 13.20 cfs @ 11.69 hrs, Volume= 636,183 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Peak Elev= 884.31' @ 12.71 hrs Surf.Area= 57,123 sf Storage= 79,463 cf Plug-Flow detention time= 95.6 min calculated for 636,183 cf (100% of inflow) Center-of-Mass det. time= 94.2 min ( 897.3 - 803.1 ) Volume Invert Avail.Storage Storage Description #1 881.68' 132,713 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 881.68 21,378 0 0 882.00 21,544 6,868 6,868 883.00 27,026 24,285 31,153 884.00 39,955 33,491 64,643 885.00 96,185 68,070 132,713 Device Routing Invert Outlet Devices #1 Primary 881.68'24.0" Round CMP_Round 24" L= 98.0' Ke= 0.500 Inlet / Outlet Invert= 881.68' / 880.82' S= 0.0088 '/' Cc= 0.900 n= 0.025, Flow Area= 3.14 sf #2 Secondary 884.50'100.0' long Broad-Crested Rectangular Weir Head (feet) 0.50 Coef. (English) 3.07 Primary OutFlow Max=13.20 cfs @ 11.69 hrs HW=884.25' (Free Discharge) 1=CMP_Round 24" (Barrel Controls 13.20 cfs @ 4.25 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=881.68' (Free Discharge) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Indy Huff 24-hr 100yr-6hr Rainfall=4.50"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 49HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Pond 1P: Detention Pond Inflow Outflow Primary Secondary Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=2,546,726 sf Peak Elev=884.31' Storage=79,463 cf 14.77 cfs 13.20 cfs 13.20 cfs 0.00 cfs Indy Huff 24-hr 100yr-12hr Rainfall=5.16"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 50HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Storm Runoff = 17.58 cfs @ 11.26 hrs, Volume= 767,539 cf, Depth= 3.62" Routed to Pond 1P : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Indy Huff 24-hr 100yr-12hr Rainfall=5.16" Area (sf) CN Description * 1,183,381 98 Paved Parking & Roofs Offsite * 1,164,243 74 >75% Grass Cover, Offsite * 44,424 98 Paved Parking & Roofs, New Work 118,498 74 >75% Grass cover, Good, HSG C * 36,180 98 Paved Parking & Roofs, Existing On Site 2,546,726 86 Weighted Average 1,282,741 50.37% Pervious Area 1,263,985 49.63% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Roof 48.1 2,600 0.0036 0.90 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 53.1 2,600 Total Subcatchment 1S: Storm Runoff Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Indy Huff 24-hr 100yr-12hr Rainfall=5.16" Runoff Area=2,546,726 sf Runoff Volume=767,539 cf Runoff Depth=3.62" Flow Length=2,600' Slope=0.0036 '/' Tc=53.1 min CN=86 17.58 cfs Indy Huff 24-hr 100yr-12hr Rainfall=5.16"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 51HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Pond 1P: Detention Pond Inflow Area = 2,546,726 sf, 49.63% Impervious, Inflow Depth = 3.62" for 100yr-12hr event Inflow = 17.58 cfs @ 11.26 hrs, Volume= 767,539 cf Outflow = 17.55 cfs @ 11.42 hrs, Volume= 766,349 cf, Atten= 0%, Lag= 9.3 min Primary = 13.54 cfs @ 11.42 hrs, Volume= 730,793 cf Secondary = 4.01 cfs @ 11.42 hrs, Volume= 35,556 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Peak Elev= 884.56' @ 11.42 hrs Surf.Area= 71,191 sf Storage= 95,514 cf Plug-Flow detention time= 96.6 min calculated for 765,711 cf (100% of inflow) Center-of-Mass det. time= 96.7 min ( 889.8 - 793.1 ) Volume Invert Avail.Storage Storage Description #1 881.68' 132,713 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 881.68 21,378 0 0 882.00 21,544 6,868 6,868 883.00 27,026 24,285 31,153 884.00 39,955 33,491 64,643 885.00 96,185 68,070 132,713 Device Routing Invert Outlet Devices #1 Primary 881.68'24.0" Round CMP_Round 24" L= 98.0' Ke= 0.500 Inlet / Outlet Invert= 881.68' / 880.82' S= 0.0088 '/' Cc= 0.900 n= 0.025, Flow Area= 3.14 sf #2 Secondary 884.50'100.0' long Broad-Crested Rectangular Weir Head (feet) 0.50 Coef. (English) 3.07 Primary OutFlow Max=13.54 cfs @ 11.42 hrs HW=884.56' (Free Discharge) 1=CMP_Round 24" (Barrel Controls 13.54 cfs @ 4.31 fps) Secondary OutFlow Max=4.01 cfs @ 11.42 hrs HW=884.56' (Free Discharge) 2=Broad-Crested Rectangular Weir (Weir Controls 4.01 cfs @ 0.72 fps) Indy Huff 24-hr 100yr-12hr Rainfall=5.16"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 52HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Pond 1P: Detention Pond Inflow Outflow Primary Secondary Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=2,546,726 sf Peak Elev=884.56' Storage=95,514 cf 17.58 cfs 17.55 cfs 13.54 cfs 4.01 cfs Indy Huff 24-hr 100yr-24hr Rainfall=6.00"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 53HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Storm Runoff = 21.49 cfs @ 8.55 hrs, Volume= 935,799 cf, Depth= 4.41" Routed to Pond 1P : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Indy Huff 24-hr 100yr-24hr Rainfall=6.00" Area (sf) CN Description * 1,183,381 98 Paved Parking & Roofs Offsite * 1,164,243 74 >75% Grass Cover, Offsite * 44,424 98 Paved Parking & Roofs, New Work 118,498 74 >75% Grass cover, Good, HSG C * 36,180 98 Paved Parking & Roofs, Existing On Site 2,546,726 86 Weighted Average 1,282,741 50.37% Pervious Area 1,263,985 49.63% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Roof 48.1 2,600 0.0036 0.90 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 53.1 2,600 Total Subcatchment 1S: Storm Runoff Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Indy Huff 24-hr 100yr-24hr Rainfall=6.00" Runoff Area=2,546,726 sf Runoff Volume=935,799 cf Runoff Depth=4.41" Flow Length=2,600' Slope=0.0036 '/' Tc=53.1 min CN=86 21.49 cfs Indy Huff 24-hr 100yr-24hr Rainfall=6.00"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 54HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Summary for Pond 1P: Detention Pond Inflow Area = 2,546,726 sf, 49.63% Impervious, Inflow Depth = 4.41" for 100yr-24hr event Inflow = 21.49 cfs @ 8.55 hrs, Volume= 935,799 cf Outflow = 21.26 cfs @ 9.42 hrs, Volume= 934,603 cf, Atten= 1%, Lag= 52.3 min Primary = 13.65 cfs @ 9.42 hrs, Volume= 817,454 cf Secondary = 7.61 cfs @ 9.42 hrs, Volume= 117,150 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.05 hrs Peak Elev= 884.59' @ 9.42 hrs Surf.Area= 72,850 sf Storage= 97,640 cf Plug-Flow detention time= 90.7 min calculated for 933,825 cf (100% of inflow) Center-of-Mass det. time= 91.0 min ( 873.8 - 782.9 ) Volume Invert Avail.Storage Storage Description #1 881.68' 132,713 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 881.68 21,378 0 0 882.00 21,544 6,868 6,868 883.00 27,026 24,285 31,153 884.00 39,955 33,491 64,643 885.00 96,185 68,070 132,713 Device Routing Invert Outlet Devices #1 Primary 881.68'24.0" Round CMP_Round 24" L= 98.0' Ke= 0.500 Inlet / Outlet Invert= 881.68' / 880.82' S= 0.0088 '/' Cc= 0.900 n= 0.025, Flow Area= 3.14 sf #2 Secondary 884.50'100.0' long Broad-Crested Rectangular Weir Head (feet) 0.50 Coef. (English) 3.07 Primary OutFlow Max=13.65 cfs @ 9.42 hrs HW=884.59' (Free Discharge) 1=CMP_Round 24" (Barrel Controls 13.65 cfs @ 4.35 fps) Secondary OutFlow Max=7.61 cfs @ 9.42 hrs HW=884.59' (Free Discharge) 2=Broad-Crested Rectangular Weir (Weir Controls 7.61 cfs @ 0.90 fps) Indy Huff 24-hr 100yr-24hr Rainfall=6.00"e - Post - Development Basin Routing Printed 3/8/2022Prepared by {enter your company name here} Page 55HydroCAD® 10.10-7a s/n 08773 © 2021 HydroCAD Software Solutions LLC Pond 1P: Detention Pond Inflow Outflow Primary Secondary Hydrograph Time (hours) 605856545250484644424038363432302826242220181614121086420Flow (cfs)24 22 20 18 16 14 12 10 8 6 4 2 0 Inflow Area=2,546,726 sf Peak Elev=884.59' Storage=97,640 cf 21.49 cfs 21.26 cfs 13.65 cfs 7.61 cfs Appendix B Impervious/Pervious Area Map XXXXR/WR/W3.1'8.2'.PLPLPLPLPLPL PL PL PLPLPL 10"STM12"STM15"STM15"STMSTMWetland12"STM12"STM12" STM12" STM12"STMDSDSDSCOCO8 " R D 8 " R D 8"RD8"RD8"RD 12456R/W3885 885 885 885885 G12"STMGG885 885MEDVET CARMEL - ADDITIONDEVELOPED CONDITIONS EXHIBITLEGENDDEVELOPED SITE IMPERVIOUS AREA(44,424 S.F. / 1.02 ACRES)DEVELOPED SITE PERVIOUS AREA(118,498 S.F. / 2.72 ACRES)EXISTING SITE IMPERVIOUS AREA(36,180 S.F. / 0.83 ACRES)0GRAPHIC SCALESCALE IN FEET60120180