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HomeMy WebLinkAboutCombined-Stormwater-MaterialsFrom: Allison Robbie <asr@tgmillerpc.com> Sent: Tuesday, March 22, 2022 4:19 PM To: Brent Cross <bcross@cayuga-heights.ny.us> Cc: David Herrick <dah@tgmillerpc.com>; Judith Germano <judigermano@gmail.com> Subject: FW: Germano Stormwater Calculaons Hi Brent, In the aached PDF document please find our combined stormwater materials including exisng and proposed HydroCAD calculaons, Extreme Precipitaon Tables from the Northeast Reginal Climate Center used in the HydroCAD calculaons, Exisng and Proposed Cover Maps, and our updated Grading Plan. The rain garden will have a 4” perforated underdrain as the primary outlet roung method, and a 1.3’x2.0’ cast in place concrete (or possibly dry laid stone) spillway as the secondary outlet roung method. The pre-developed to post-developed HydroCAD modeling results are summarized in the table below: HYDROLOGIC MODELING RESULTS Peak Rate of Runoff (cfs) 1-yr 10-yr 100-yr Pre-Developed: 0.29 0.85 2.00 Post-Developed: 0.25 0.67 1.98 (-0.04)(-0.18)(-0.02) As you can see from the table and aached modeling results, peak discharge rates are migated for the 1, 10, and 100- year storm events by using the detenon capacity inherent in the rain garden. Please let us know if you have any further quesons or comments at this me. Thank you, Allison S. Robbie, E.I.T. Civil Engineer T.G. MILLER, P.C. Engineers and Surveyors 605 West State Street, Suite A, Ithaca, NY 14850 T: 607-272-6477 x238 | F: 607-273-6322 | C: 330-612-5702 1S Project Area 2R Highland Road Routing Diagram for EXISTING WATERHSED ANALYSIS Prepared by 893 Highland Road, Printed 3/22/2022 HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. EXISTING WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 2HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (acres) CN Description (subcatchment-numbers) 0.001 98 Unconnected roofs, HSG D (1S) 0.316 79 Woods/grass comb., Good, HSG D (1S) 0.317 79 TOTAL AREA This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. EXISTING WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 3HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Soil Listing (all nodes) Area (acres) Soil Group Subcatchment Numbers 0.000 HSG A 0.000 HSG B 0.000 HSG C 0.317 HSG D 1S 0.000 Other 0.317 TOTAL AREA This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. EXISTING WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 4HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Ground Covers (all 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 0.001 0.000 0.001 Unconnected roofs 1S 0.000 0.000 0.000 0.316 0.000 0.316 Woods/grass comb., Good 1S 0.000 0.000 0.000 0.317 0.000 0.317 TOTAL AREA This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 1-yr Rainfall=2.00"EXISTING WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 5HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Time span=0.00-24.00 hrs, dt=0.01 hrs, 2401 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=13,808 sf 0.46% Impervious Runoff Depth>0.52"Subcatchment 1S: Project Area Tc=6.0 min CN=79 Runoff=0.29 cfs 0.014 af Inflow=0.29 cfs 0.014 afReach 2R: Highland Road Outflow=0.29 cfs 0.014 af Total Runoff Area = 0.317 ac Runoff Volume = 0.014 af Average Runoff Depth = 0.52" 99.54% Pervious = 0.316 ac 0.46% Impervious = 0.001 ac This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 1-yr Rainfall=2.00"EXISTING WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 6HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Project Area Runoff =0.29 cfs @ 11.98 hrs, Volume=0.014 af, Depth>0.52" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1-yr Rainfall=2.00" Area (sf)CN Description 64 98 Unconnected roofs, HSG D 13,744 79 Woods/grass comb., Good, HSG D 13,808 79 Weighted Average 13,744 99.54% Pervious Area 64 0.46% Impervious Area 64 100.00% Unconnected Tc Length Slope Velocity Capacity Description (min)(feet)(ft/ft)(ft/sec)(cfs) 6.0 Direct Entry, Subcatchment 1S: Project Area Runoff Hydrograph Time (hours) 2423222120191817161514131211109876543210 Fl o w ( c f s ) 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Type II 24-hr 1-yr Rainfall=2.00" Runoff Area=13,808 sf Runoff Volume=0.014 af Runoff Depth>0.52" Tc=6.0 min CN=79 0.29 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 1-yr Rainfall=2.00"EXISTING WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 7HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Project Area Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.01 0.00 0.00 1.00 0.02 0.00 0.00 1.50 0.03 0.00 0.00 2.00 0.04 0.00 0.00 2.50 0.06 0.00 0.00 3.00 0.07 0.00 0.00 3.50 0.08 0.00 0.00 4.00 0.10 0.00 0.00 4.50 0.11 0.00 0.00 5.00 0.13 0.00 0.00 5.50 0.14 0.00 0.00 6.00 0.16 0.00 0.00 6.50 0.18 0.00 0.00 7.00 0.20 0.00 0.00 7.50 0.22 0.00 0.00 8.00 0.24 0.00 0.00 8.50 0.26 0.00 0.00 9.00 0.29 0.00 0.00 9.50 0.33 0.00 0.00 10.00 0.36 0.00 0.00 10.50 0.41 0.00 0.00 11.00 0.47 0.00 0.00 11.50 0.57 0.00 0.00 12.00 1.33 0.18 0.28 12.50 1.47 0.24 0.03 13.00 1.54 0.28 0.02 13.50 1.60 0.31 0.02 14.00 1.64 0.33 0.01 14.50 1.68 0.34 0.01 15.00 1.71 0.36 0.01 15.50 1.74 0.38 0.01 16.00 1.76 0.39 0.01 16.50 1.78 0.40 0.01 17.00 1.80 0.41 0.01 17.50 1.82 0.42 0.01 18.00 1.84 0.43 0.01 18.50 1.86 0.44 0.01 19.00 1.88 0.45 0.01 19.50 1.89 0.46 0.01 20.00 1.90 0.47 0.00 20.50 1.92 0.47 0.00 21.00 1.93 0.48 0.00 21.50 1.94 0.49 0.00 22.00 1.95 0.50 0.00 22.50 1.97 0.50 0.00 23.00 1.98 0.51 0.00 23.50 1.99 0.52 0.00 24.00 2.00 0.52 0.00 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 1-yr Rainfall=2.00"EXISTING WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 8HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Summary for Reach 2R: Highland Road Inflow Area =0.317 ac,0.46% Impervious, Inflow Depth > 0.52" for 1-yr event Inflow =0.29 cfs @ 11.98 hrs, Volume=0.014 af Outflow =0.29 cfs @ 11.98 hrs, Volume=0.014 af, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Reach 2R: Highland Road Inflow Outflow Hydrograph Time (hours) 2423222120191817161514131211109876543210 Fl o w ( c f s ) 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=0.317 ac 0.29 cfs 0.29 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 1-yr Rainfall=2.00"EXISTING WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 9HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Hydrograph for Reach 2R: Highland Road Time (hours) Inflow (cfs) Elevation (feet) Outflow (cfs) 0.00 0.00 0.00 0.50 0.00 0.00 1.00 0.00 0.00 1.50 0.00 0.00 2.00 0.00 0.00 2.50 0.00 0.00 3.00 0.00 0.00 3.50 0.00 0.00 4.00 0.00 0.00 4.50 0.00 0.00 5.00 0.00 0.00 5.50 0.00 0.00 6.00 0.00 0.00 6.50 0.00 0.00 7.00 0.00 0.00 7.50 0.00 0.00 8.00 0.00 0.00 8.50 0.00 0.00 9.00 0.00 0.00 9.50 0.00 0.00 10.00 0.00 0.00 10.50 0.00 0.00 11.00 0.00 0.00 11.50 0.00 0.00 12.00 0.28 0.28 12.50 0.03 0.03 13.00 0.02 0.02 13.50 0.02 0.02 14.00 0.01 0.01 14.50 0.01 0.01 15.00 0.01 0.01 15.50 0.01 0.01 16.00 0.01 0.01 16.50 0.01 0.01 17.00 0.01 0.01 17.50 0.01 0.01 18.00 0.01 0.01 18.50 0.01 0.01 19.00 0.01 0.01 19.50 0.01 0.01 20.00 0.00 0.00 20.50 0.00 0.00 21.00 0.00 0.00 21.50 0.00 0.00 22.00 0.00 0.00 22.50 0.00 0.00 23.00 0.00 0.00 23.50 0.00 0.00 24.00 0.00 0.00 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 10-yr Rainfall=3.42"EXISTING WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 10HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Time span=0.00-24.00 hrs, dt=0.01 hrs, 2401 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=13,808 sf 0.46% Impervious Runoff Depth>1.50"Subcatchment 1S: Project Area Tc=6.0 min CN=79 Runoff=0.85 cfs 0.040 af Inflow=0.85 cfs 0.040 afReach 2R: Highland Road Outflow=0.85 cfs 0.040 af Total Runoff Area = 0.317 ac Runoff Volume = 0.040 af Average Runoff Depth = 1.50" 99.54% Pervious = 0.316 ac 0.46% Impervious = 0.001 ac This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 10-yr Rainfall=3.42"EXISTING WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 11HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Project Area Runoff =0.85 cfs @ 11.98 hrs, Volume=0.040 af, Depth>1.50" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10-yr Rainfall=3.42" Area (sf)CN Description 64 98 Unconnected roofs, HSG D 13,744 79 Woods/grass comb., Good, HSG D 13,808 79 Weighted Average 13,744 99.54% Pervious Area 64 0.46% Impervious Area 64 100.00% Unconnected Tc Length Slope Velocity Capacity Description (min)(feet)(ft/ft)(ft/sec)(cfs) 6.0 Direct Entry, Subcatchment 1S: Project Area Runoff Hydrograph Time (hours) 2423222120191817161514131211109876543210 Fl o w ( c f s ) 0.95 0.9 0.85 0.8 0.75 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Type II 24-hr 10-yr Rainfall=3.42" Runoff Area=13,808 sf Runoff Volume=0.040 af Runoff Depth>1.50" Tc=6.0 min CN=79 0.85 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 10-yr Rainfall=3.42"EXISTING WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 12HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Project Area Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.04 0.00 0.00 1.50 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.50 0.10 0.00 0.00 3.00 0.12 0.00 0.00 3.50 0.14 0.00 0.00 4.00 0.16 0.00 0.00 4.50 0.19 0.00 0.00 5.00 0.22 0.00 0.00 5.50 0.24 0.00 0.00 6.00 0.27 0.00 0.00 6.50 0.31 0.00 0.00 7.00 0.34 0.00 0.00 7.50 0.37 0.00 0.00 8.00 0.41 0.00 0.00 8.50 0.45 0.00 0.00 9.00 0.50 0.00 0.00 9.50 0.56 0.00 0.00 10.00 0.62 0.00 0.00 10.50 0.70 0.01 0.01 11.00 0.80 0.03 0.01 11.50 0.97 0.06 0.03 12.00 2.27 0.69 0.81 12.50 2.51 0.85 0.08 13.00 2.64 0.93 0.05 13.50 2.73 1.00 0.04 14.00 2.80 1.05 0.03 14.50 2.86 1.09 0.03 15.00 2.92 1.13 0.02 15.50 2.97 1.16 0.02 16.00 3.01 1.20 0.02 16.50 3.05 1.22 0.02 17.00 3.08 1.25 0.02 17.50 3.12 1.28 0.02 18.00 3.15 1.30 0.01 18.50 3.18 1.32 0.01 19.00 3.21 1.34 0.01 19.50 3.23 1.36 0.01 20.00 3.26 1.38 0.01 20.50 3.28 1.40 0.01 21.00 3.30 1.41 0.01 21.50 3.32 1.43 0.01 22.00 3.34 1.44 0.01 22.50 3.36 1.46 0.01 23.00 3.38 1.47 0.01 23.50 3.40 1.49 0.01 24.00 3.42 1.50 0.01 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 10-yr Rainfall=3.42"EXISTING WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 13HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Summary for Reach 2R: Highland Road Inflow Area =0.317 ac,0.46% Impervious, Inflow Depth > 1.50" for 10-yr event Inflow =0.85 cfs @ 11.98 hrs, Volume=0.040 af Outflow =0.85 cfs @ 11.98 hrs, Volume=0.040 af, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Reach 2R: Highland Road Inflow Outflow Hydrograph Time (hours) 2423222120191817161514131211109876543210 Fl o w ( c f s ) 0.95 0.9 0.85 0.8 0.75 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=0.317 ac 0.85 cfs 0.85 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 10-yr Rainfall=3.42"EXISTING WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 14HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Hydrograph for Reach 2R: Highland Road Time (hours) Inflow (cfs) Elevation (feet) Outflow (cfs) 0.00 0.00 0.00 0.50 0.00 0.00 1.00 0.00 0.00 1.50 0.00 0.00 2.00 0.00 0.00 2.50 0.00 0.00 3.00 0.00 0.00 3.50 0.00 0.00 4.00 0.00 0.00 4.50 0.00 0.00 5.00 0.00 0.00 5.50 0.00 0.00 6.00 0.00 0.00 6.50 0.00 0.00 7.00 0.00 0.00 7.50 0.00 0.00 8.00 0.00 0.00 8.50 0.00 0.00 9.00 0.00 0.00 9.50 0.00 0.00 10.00 0.00 0.00 10.50 0.01 0.01 11.00 0.01 0.01 11.50 0.03 0.03 12.00 0.81 0.81 12.50 0.08 0.08 13.00 0.05 0.05 13.50 0.04 0.04 14.00 0.03 0.03 14.50 0.03 0.03 15.00 0.02 0.02 15.50 0.02 0.02 16.00 0.02 0.02 16.50 0.02 0.02 17.00 0.02 0.02 17.50 0.02 0.02 18.00 0.01 0.01 18.50 0.01 0.01 19.00 0.01 0.01 19.50 0.01 0.01 20.00 0.01 0.01 20.50 0.01 0.01 21.00 0.01 0.01 21.50 0.01 0.01 22.00 0.01 0.01 22.50 0.01 0.01 23.00 0.01 0.01 23.50 0.01 0.01 24.00 0.01 0.01 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 100-yr Rainfall=5.90"EXISTING WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 15HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Time span=0.00-24.00 hrs, dt=0.01 hrs, 2401 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=13,808 sf 0.46% Impervious Runoff Depth>3.59"Subcatchment 1S: Project Area Tc=6.0 min CN=79 Runoff=2.00 cfs 0.095 af Inflow=2.00 cfs 0.095 afReach 2R: Highland Road Outflow=2.00 cfs 0.095 af Total Runoff Area = 0.317 ac Runoff Volume = 0.095 af Average Runoff Depth = 3.59" 99.54% Pervious = 0.316 ac 0.46% Impervious = 0.001 ac This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 100-yr Rainfall=5.90"EXISTING WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 16HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Project Area Runoff =2.00 cfs @ 11.97 hrs, Volume=0.095 af, Depth>3.59" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100-yr Rainfall=5.90" Area (sf)CN Description 64 98 Unconnected roofs, HSG D 13,744 79 Woods/grass comb., Good, HSG D 13,808 79 Weighted Average 13,744 99.54% Pervious Area 64 0.46% Impervious Area 64 100.00% Unconnected Tc Length Slope Velocity Capacity Description (min)(feet)(ft/ft)(ft/sec)(cfs) 6.0 Direct Entry, Subcatchment 1S: Project Area Runoff Hydrograph Time (hours) 2423222120191817161514131211109876543210 Fl o w ( c f s ) 2 1 0 Type II 24-hr 100-yr Rainfall=5.90" Runoff Area=13,808 sf Runoff Volume=0.095 af Runoff Depth>3.59" Tc=6.0 min CN=79 2.00 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 100-yr Rainfall=5.90"EXISTING WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 17HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Project Area Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.06 0.00 0.00 1.50 0.10 0.00 0.00 2.00 0.13 0.00 0.00 2.50 0.17 0.00 0.00 3.00 0.20 0.00 0.00 3.50 0.24 0.00 0.00 4.00 0.28 0.00 0.00 4.50 0.33 0.00 0.00 5.00 0.37 0.00 0.00 5.50 0.42 0.00 0.00 6.00 0.47 0.00 0.00 6.50 0.53 0.00 0.00 7.00 0.58 0.00 0.00 7.50 0.64 0.00 0.00 8.00 0.71 0.01 0.00 8.50 0.78 0.02 0.01 9.00 0.87 0.04 0.01 9.50 0.96 0.06 0.02 10.00 1.07 0.09 0.02 10.50 1.20 0.14 0.03 11.00 1.39 0.21 0.05 11.50 1.67 0.34 0.10 12.00 3.91 1.89 1.86 12.50 4.34 2.24 0.17 13.00 4.55 2.42 0.10 13.50 4.71 2.56 0.08 14.00 4.84 2.66 0.06 14.50 4.94 2.75 0.06 15.00 5.04 2.83 0.05 15.50 5.12 2.90 0.04 16.00 5.19 2.97 0.04 16.50 5.26 3.03 0.04 17.00 5.32 3.08 0.03 17.50 5.38 3.13 0.03 18.00 5.43 3.18 0.03 18.50 5.49 3.22 0.03 19.00 5.53 3.27 0.03 19.50 5.58 3.30 0.02 20.00 5.62 3.34 0.02 20.50 5.65 3.37 0.02 21.00 5.69 3.41 0.02 21.50 5.73 3.44 0.02 22.00 5.76 3.47 0.02 22.50 5.80 3.50 0.02 23.00 5.83 3.53 0.02 23.50 5.87 3.56 0.02 24.00 5.90 3.59 0.02 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 100-yr Rainfall=5.90"EXISTING WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 18HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Summary for Reach 2R: Highland Road Inflow Area =0.317 ac,0.46% Impervious, Inflow Depth > 3.59" for 100-yr event Inflow =2.00 cfs @ 11.97 hrs, Volume=0.095 af Outflow =2.00 cfs @ 11.97 hrs, Volume=0.095 af, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Reach 2R: Highland Road Inflow Outflow Hydrograph Time (hours) 2423222120191817161514131211109876543210 Fl o w ( c f s ) 2 1 0 Inflow Area=0.317 ac 2.00 cfs 2.00 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 100-yr Rainfall=5.90"EXISTING WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 19HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Hydrograph for Reach 2R: Highland Road Time (hours) Inflow (cfs) Elevation (feet) Outflow (cfs) 0.00 0.00 0.00 0.50 0.00 0.00 1.00 0.00 0.00 1.50 0.00 0.00 2.00 0.00 0.00 2.50 0.00 0.00 3.00 0.00 0.00 3.50 0.00 0.00 4.00 0.00 0.00 4.50 0.00 0.00 5.00 0.00 0.00 5.50 0.00 0.00 6.00 0.00 0.00 6.50 0.00 0.00 7.00 0.00 0.00 7.50 0.00 0.00 8.00 0.00 0.00 8.50 0.01 0.01 9.00 0.01 0.01 9.50 0.02 0.02 10.00 0.02 0.02 10.50 0.03 0.03 11.00 0.05 0.05 11.50 0.10 0.10 12.00 1.86 1.86 12.50 0.17 0.17 13.00 0.10 0.10 13.50 0.08 0.08 14.00 0.06 0.06 14.50 0.06 0.06 15.00 0.05 0.05 15.50 0.04 0.04 16.00 0.04 0.04 16.50 0.04 0.04 17.00 0.03 0.03 17.50 0.03 0.03 18.00 0.03 0.03 18.50 0.03 0.03 19.00 0.03 0.03 19.50 0.02 0.02 20.00 0.02 0.02 20.50 0.02 0.02 21.00 0.02 0.02 21.50 0.02 0.02 22.00 0.02 0.02 22.50 0.02 0.02 23.00 0.02 0.02 23.50 0.02 0.02 24.00 0.02 0.02 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. 1S Project Area 1P Rain Garden Routing Diagram for PROPOSED WATERHSED ANALYSIS Prepared by 893 Highland Road, Printed 3/22/2022 HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 2HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (acres) CN Description (subcatchment-numbers) 0.056 98 Paved parking, HSG D (1S) 0.062 98 Unconnected roofs, HSG D (1S) 0.199 79 Woods/grass comb., Good, HSG D (1S) 0.317 86 TOTAL AREA This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 3HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Soil Listing (all nodes) Area (acres) Soil Group Subcatchment Numbers 0.000 HSG A 0.000 HSG B 0.000 HSG C 0.317 HSG D 1S 0.000 Other 0.317 TOTAL AREA This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 4HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Ground Covers (all 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 0.056 0.000 0.056 Paved parking 1S 0.000 0.000 0.000 0.062 0.000 0.062 Unconnected roofs 1S 0.000 0.000 0.000 0.199 0.000 0.199 Woods/grass comb., Good 1S 0.000 0.000 0.000 0.317 0.000 0.317 TOTAL AREA This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 5HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Pipe Listing (all 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 1P 760.84 760.00 29.0 0.0290 0.020 0.0 4.0 0.0 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 1-yr Rainfall=2.00"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 6HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Time span=3.00-21.00 hrs, dt=0.05 hrs, 361 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=13,808 sf 37.15% Impervious Runoff Depth>0.79"Subcatchment 1S: Project Area Tc=6.0 min CN=86 Runoff=0.47 cfs 0.021 af Peak Elev=761.71' Storage=181 cf Inflow=0.47 cfs 0.021 afPond 1P: Rain Garden Primary=0.25 cfs 0.021 af Secondary=0.00 cfs 0.000 af Outflow=0.25 cfs 0.021 af Total Runoff Area = 0.317 ac Runoff Volume = 0.021 af Average Runoff Depth = 0.79" 62.85% Pervious = 0.199 ac 37.15% Impervious = 0.118 ac This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 1-yr Rainfall=2.00"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 7HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Project Area Runoff =0.47 cfs @ 11.98 hrs, Volume=0.021 af, Depth>0.79" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 3.00-21.00 hrs, dt= 0.05 hrs Type II 24-hr 1-yr Rainfall=2.00" Area (sf)CN Description 8,679 79 Woods/grass comb., Good, HSG D 2,700 98 Unconnected roofs, HSG D 2,429 98 Paved parking, HSG D 13,808 86 Weighted Average 8,679 62.85% Pervious Area 5,129 37.15% Impervious Area 2,700 52.64% Unconnected Tc Length Slope Velocity Capacity Description (min)(feet)(ft/ft)(ft/sec)(cfs) 6.0 Direct Entry, Subcatchment 1S: Project Area Runoff Hydrograph Time (hours) 2120191817161514131211109876543 Fl o w ( c f s ) 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Type II 24-hr 1-yr Rainfall=2.00" Runoff Area=13,808 sf Runoff Volume=0.021 af Runoff Depth>0.79" Tc=6.0 min CN=86 0.47 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 1-yr Rainfall=2.00"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 8HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Project Area Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 3.00 0.07 0.00 0.00 3.25 0.08 0.00 0.00 3.50 0.08 0.00 0.00 3.75 0.09 0.00 0.00 4.00 0.10 0.00 0.00 4.25 0.10 0.00 0.00 4.50 0.11 0.00 0.00 4.75 0.12 0.00 0.00 5.00 0.13 0.00 0.00 5.25 0.13 0.00 0.00 5.50 0.14 0.00 0.00 5.75 0.15 0.00 0.00 6.00 0.16 0.00 0.00 6.25 0.17 0.00 0.00 6.50 0.18 0.00 0.00 6.75 0.19 0.00 0.00 7.00 0.20 0.00 0.00 7.25 0.21 0.00 0.00 7.50 0.22 0.00 0.00 7.75 0.23 0.00 0.00 8.00 0.24 0.00 0.00 8.25 0.25 0.00 0.00 8.50 0.26 0.00 0.00 8.75 0.28 0.00 0.00 9.00 0.29 0.00 0.00 9.25 0.31 0.00 0.00 9.50 0.33 0.00 0.00 9.75 0.34 0.00 0.00 10.00 0.36 0.00 0.00 10.25 0.38 0.00 0.00 10.50 0.41 0.00 0.00 10.75 0.44 0.01 0.00 11.00 0.47 0.01 0.01 11.25 0.51 0.02 0.01 11.50 0.57 0.03 0.02 11.75 0.77 0.10 0.10 12.00 1.33 0.38 0.45 12.25 1.41 0.44 0.07 12.50 1.47 0.47 0.04 12.75 1.51 0.50 0.03 13.00 1.54 0.52 0.03 13.25 1.57 0.54 0.02 13.50 1.60 0.56 0.02 13.75 1.62 0.57 0.02 14.00 1.64 0.59 0.02 14.25 1.66 0.60 0.02 14.50 1.68 0.61 0.02 14.75 1.69 0.62 0.01 15.00 1.71 0.63 0.01 15.25 1.72 0.64 0.01 15.50 1.74 0.65 0.01 15.75 1.75 0.66 0.01 16.00 1.76 0.67 0.01 16.25 1.77 0.68 0.01 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 16.50 1.78 0.69 0.01 16.75 1.79 0.70 0.01 17.00 1.80 0.70 0.01 17.25 1.81 0.71 0.01 17.50 1.82 0.72 0.01 17.75 1.83 0.72 0.01 18.00 1.84 0.73 0.01 18.25 1.85 0.74 0.01 18.50 1.86 0.74 0.01 18.75 1.87 0.75 0.01 19.00 1.88 0.76 0.01 19.25 1.88 0.76 0.01 19.50 1.89 0.77 0.01 19.75 1.90 0.77 0.01 20.00 1.90 0.78 0.01 20.25 1.91 0.78 0.01 20.50 1.92 0.79 0.01 20.75 1.92 0.79 0.01 21.00 1.93 0.80 0.01 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 1-yr Rainfall=2.00"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 9HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Rain Garden Inflow Area =0.317 ac,37.15% Impervious, Inflow Depth > 0.79" for 1-yr event Inflow =0.47 cfs @ 11.98 hrs, Volume=0.021 af Outflow =0.25 cfs @ 12.07 hrs, Volume=0.021 af, Atten= 47%, Lag= 5.4 min Primary =0.25 cfs @ 12.07 hrs, Volume=0.021 af Secondary =0.00 cfs @ 3.00 hrs, Volume=0.000 af Routing by Dyn-Stor-Ind method, Time Span= 3.00-21.00 hrs, dt= 0.05 hrs Peak Elev= 761.71' @ 12.07 hrs Surf.Area= 652 sf Storage= 181 cf Plug-Flow detention time= 16.6 min calculated for 0.021 af (98% of inflow) Center-of-Mass det. time= 10.2 min ( 816.9 - 806.8 ) Volume Invert Avail.Storage Storage Description #1 760.84'850 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet)(sq-ft)(%)(cubic-feet)(cubic-feet) 760.84 650 0.0 0 0 761.16 650 40.0 83 83 761.17 650 20.0 1 84 761.66 650 20.0 64 148 761.67 650 100.0 6 155 762.70 700 100.0 695 850 Device Routing Invert Outlet Devices #1 Primary 760.84'4.0" Round Culvert L= 29.0' CPP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 760.84' / 760.00' S= 0.0290 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.09 sf #2 Secondary 762.00'1.3' long x 2.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 Coef. (English) 2.54 2.61 2.61 2.60 2.66 2.70 2.77 2.89 2.88 2.85 3.07 3.20 3.32 Primary OutFlow Max=0.25 cfs @ 12.07 hrs HW=761.71' (Free Discharge) 1=Culvert (Barrel Controls 0.25 cfs @ 2.86 fps) Secondary OutFlow Max=0.00 cfs @ 3.00 hrs HW=760.84' (Free Discharge) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 1-yr Rainfall=2.00"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 10HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Pond 1P: Rain Garden Inflow Outflow Primary Secondary Hydrograph Time (hours) 2120191817161514131211109876543 Fl o w ( c f s ) 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=0.317 ac Peak Elev=761.71' Storage=181 cf 0.47 cfs 0.25 cfs 0.25 cfs 0.00 cfs Pond 1P: Rain Garden Total Primary Secondary Stage-Discharge Discharge (cfs) 210 El e v a t i o n ( f e e t ) 762 761 Culvert Broad-Crested Rectangular Weir This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 1-yr Rainfall=2.00"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 11HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Pond 1P: Rain Garden Surface Storage Stage-Area-Storage Storage (cubic-feet) 8007006005004003002001000 Surface/Horizontal/Wetted Area (sq-ft) 700650600550500450400350300250200150100500 El e v a t i o n ( f e e t ) 762 761 Custom Stage Data This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 1-yr Rainfall=2.00"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 12HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Hydrograph for Pond 1P: Rain Garden Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Outflow (cfs) Primary (cfs) Secondary (cfs) 3.00 0.00 0 760.84 0.00 0.00 0.00 3.50 0.00 0 760.84 0.00 0.00 0.00 4.00 0.00 0 760.84 0.00 0.00 0.00 4.50 0.00 0 760.84 0.00 0.00 0.00 5.00 0.00 0 760.84 0.00 0.00 0.00 5.50 0.00 0 760.84 0.00 0.00 0.00 6.00 0.00 0 760.84 0.00 0.00 0.00 6.50 0.00 0 760.84 0.00 0.00 0.00 7.00 0.00 0 760.84 0.00 0.00 0.00 7.50 0.00 0 760.84 0.00 0.00 0.00 8.00 0.00 0 760.84 0.00 0.00 0.00 8.50 0.00 0 760.84 0.00 0.00 0.00 9.00 0.00 0 760.84 0.00 0.00 0.00 9.50 0.00 0 760.84 0.00 0.00 0.00 10.00 0.00 1 760.84 0.00 0.00 0.00 10.50 0.00 3 760.85 0.00 0.00 0.00 11.00 0.01 9 760.87 0.00 0.00 0.00 11.50 0.02 17 760.91 0.01 0.01 0.00 12.00 0.45 158 761.67 0.25 0.25 0.00 12.50 0.04 45 761.01 0.07 0.07 0.00 13.00 0.03 31 760.96 0.03 0.03 0.00 13.50 0.02 26 760.94 0.02 0.02 0.00 14.00 0.02 23 760.93 0.02 0.02 0.00 14.50 0.02 22 760.92 0.02 0.02 0.00 15.00 0.01 21 760.92 0.01 0.01 0.00 15.50 0.01 20 760.92 0.01 0.01 0.00 16.00 0.01 18 760.91 0.01 0.01 0.00 16.50 0.01 18 760.91 0.01 0.01 0.00 17.00 0.01 17 760.91 0.01 0.01 0.00 17.50 0.01 17 760.90 0.01 0.01 0.00 18.00 0.01 16 760.90 0.01 0.01 0.00 18.50 0.01 16 760.90 0.01 0.01 0.00 19.00 0.01 15 760.90 0.01 0.01 0.00 19.50 0.01 15 760.90 0.01 0.01 0.00 20.00 0.01 14 760.89 0.01 0.01 0.00 20.50 0.01 14 760.89 0.01 0.01 0.00 21.00 0.01 14 760.89 0.01 0.01 0.00 This document was created by an application that isn’t licensed to use novaPDF. 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Type II 24-hr 1-yr Rainfall=2.00"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 13HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Stage-Discharge for Pond 1P: Rain Garden Elevation (feet) Discharge (cfs) Primary (cfs) Secondary (cfs) 760.84 0.00 0.00 0.00 760.86 0.00 0.00 0.00 760.88 0.00 0.00 0.00 760.90 0.01 0.01 0.00 760.92 0.01 0.01 0.00 760.94 0.02 0.02 0.00 760.96 0.03 0.03 0.00 760.98 0.04 0.04 0.00 761.00 0.06 0.06 0.00 761.02 0.07 0.07 0.00 761.04 0.08 0.08 0.00 761.06 0.10 0.10 0.00 761.08 0.11 0.11 0.00 761.10 0.13 0.13 0.00 761.12 0.14 0.14 0.00 761.14 0.15 0.15 0.00 761.16 0.17 0.17 0.00 761.18 0.17 0.17 0.00 761.20 0.18 0.18 0.00 761.22 0.19 0.19 0.00 761.24 0.20 0.20 0.00 761.26 0.21 0.21 0.00 761.28 0.21 0.21 0.00 761.30 0.21 0.21 0.00 761.32 0.21 0.21 0.00 761.34 0.21 0.21 0.00 761.36 0.22 0.22 0.00 761.38 0.22 0.22 0.00 761.40 0.22 0.22 0.00 761.42 0.22 0.22 0.00 761.44 0.22 0.22 0.00 761.46 0.23 0.23 0.00 761.48 0.23 0.23 0.00 761.50 0.23 0.23 0.00 761.52 0.23 0.23 0.00 761.54 0.23 0.23 0.00 761.56 0.24 0.24 0.00 761.58 0.24 0.24 0.00 761.60 0.24 0.24 0.00 761.62 0.24 0.24 0.00 761.64 0.24 0.24 0.00 761.66 0.25 0.25 0.00 761.68 0.25 0.25 0.00 761.70 0.25 0.25 0.00 761.72 0.25 0.25 0.00 761.74 0.25 0.25 0.00 761.76 0.25 0.25 0.00 761.78 0.26 0.26 0.00 761.80 0.26 0.26 0.00 761.82 0.26 0.26 0.00 761.84 0.26 0.26 0.00 761.86 0.26 0.26 0.00 761.88 0.26 0.26 0.00 761.90 0.27 0.27 0.00 Elevation (feet) Discharge (cfs) Primary (cfs) Secondary (cfs) 761.92 0.27 0.27 0.00 761.94 0.27 0.27 0.00 761.96 0.27 0.27 0.00 761.98 0.27 0.27 0.00 762.00 0.27 0.27 0.00 762.02 0.29 0.28 0.01 762.04 0.30 0.28 0.03 762.06 0.33 0.28 0.05 762.08 0.36 0.28 0.07 762.10 0.39 0.28 0.10 762.12 0.42 0.28 0.14 762.14 0.46 0.29 0.17 762.16 0.50 0.29 0.21 762.18 0.54 0.29 0.25 762.20 0.59 0.29 0.30 762.22 0.63 0.29 0.34 762.24 0.68 0.29 0.39 762.26 0.74 0.30 0.44 762.28 0.79 0.30 0.49 762.30 0.85 0.30 0.55 762.32 0.91 0.30 0.61 762.34 0.97 0.30 0.67 762.36 1.03 0.30 0.73 762.38 1.10 0.30 0.79 762.40 1.16 0.31 0.86 762.42 1.23 0.31 0.92 762.44 1.30 0.31 0.99 762.46 1.37 0.31 1.06 762.48 1.44 0.31 1.13 762.50 1.51 0.31 1.20 762.52 1.59 0.31 1.27 762.54 1.66 0.32 1.35 762.56 1.74 0.32 1.42 762.58 1.82 0.32 1.50 762.60 1.90 0.32 1.58 762.62 1.98 0.32 1.66 762.64 2.06 0.32 1.74 762.66 2.14 0.32 1.82 762.68 2.23 0.33 1.90 762.70 2.31 0.33 1.98 This document was created by an application that isn’t licensed to use novaPDF. 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Type II 24-hr 1-yr Rainfall=2.00"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 14HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 1P: Rain Garden Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 760.84 650 0 760.86 650 5 760.88 650 10 760.90 650 16 760.92 650 21 760.94 650 26 760.96 650 31 760.98 650 36 761.00 650 42 761.02 650 47 761.04 650 52 761.06 650 57 761.08 650 62 761.10 650 68 761.12 650 73 761.14 650 78 761.16 650 83 761.18 650 86 761.20 650 88 761.22 650 91 761.24 650 94 761.26 650 96 761.28 650 99 761.30 650 101 761.32 650 104 761.34 650 107 761.36 650 109 761.38 650 112 761.40 650 114 761.42 650 117 761.44 650 120 761.46 650 122 761.48 650 125 761.50 650 127 761.52 650 130 761.54 650 133 761.56 650 135 761.58 650 138 761.60 650 140 761.62 650 143 761.64 650 146 761.66 650 148 761.68 650 161 761.70 651 174 761.72 652 187 761.74 653 200 761.76 654 213 761.78 655 226 761.80 656 240 761.82 657 253 761.84 658 266 761.86 659 279 761.88 660 292 761.90 661 305 Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 761.92 662 319 761.94 663 332 761.96 664 345 761.98 665 359 762.00 666 372 762.02 667 385 762.04 668 399 762.06 669 412 762.08 670 425 762.10 671 439 762.12 672 452 762.14 673 466 762.16 674 479 762.18 675 493 762.20 676 506 762.22 677 520 762.24 678 533 762.26 679 547 762.28 680 560 762.30 681 574 762.32 682 587 762.34 683 601 762.36 683 615 762.38 684 628 762.40 685 642 762.42 686 656 762.44 687 670 762.46 688 683 762.48 689 697 762.50 690 711 762.52 691 725 762.54 692 739 762.56 693 752 762.58 694 766 762.60 695 780 762.62 696 794 762.64 697 808 762.66 698 822 762.68 699 836 762.70 700 850 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 10-yr Rainfall=3.42"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 15HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Time span=3.00-21.00 hrs, dt=0.05 hrs, 361 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=13,808 sf 37.15% Impervious Runoff Depth>1.92"Subcatchment 1S: Project Area Tc=6.0 min CN=86 Runoff=1.09 cfs 0.051 af Peak Elev=762.23' Storage=529 cf Inflow=1.09 cfs 0.051 afPond 1P: Rain Garden Primary=0.29 cfs 0.046 af Secondary=0.38 cfs 0.005 af Outflow=0.67 cfs 0.050 af Total Runoff Area = 0.317 ac Runoff Volume = 0.051 af Average Runoff Depth = 1.92" 62.85% Pervious = 0.199 ac 37.15% Impervious = 0.118 ac This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 10-yr Rainfall=3.42"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 16HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Project Area Runoff =1.09 cfs @ 11.97 hrs, Volume=0.051 af, Depth>1.92" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 3.00-21.00 hrs, dt= 0.05 hrs Type II 24-hr 10-yr Rainfall=3.42" Area (sf)CN Description 8,679 79 Woods/grass comb., Good, HSG D 2,700 98 Unconnected roofs, HSG D 2,429 98 Paved parking, HSG D 13,808 86 Weighted Average 8,679 62.85% Pervious Area 5,129 37.15% Impervious Area 2,700 52.64% Unconnected Tc Length Slope Velocity Capacity Description (min)(feet)(ft/ft)(ft/sec)(cfs) 6.0 Direct Entry, Subcatchment 1S: Project Area Runoff Hydrograph Time (hours) 2120191817161514131211109876543 Fl o w ( c f s ) 1 0 Type II 24-hr 10-yr Rainfall=3.42" Runoff Area=13,808 sf Runoff Volume=0.051 af Runoff Depth>1.92" Tc=6.0 min CN=86 1.09 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 10-yr Rainfall=3.42"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 17HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Project Area Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 3.00 0.12 0.00 0.00 3.25 0.13 0.00 0.00 3.50 0.14 0.00 0.00 3.75 0.15 0.00 0.00 4.00 0.16 0.00 0.00 4.25 0.18 0.00 0.00 4.50 0.19 0.00 0.00 4.75 0.20 0.00 0.00 5.00 0.22 0.00 0.00 5.25 0.23 0.00 0.00 5.50 0.24 0.00 0.00 5.75 0.26 0.00 0.00 6.00 0.27 0.00 0.00 6.25 0.29 0.00 0.00 6.50 0.31 0.00 0.00 6.75 0.32 0.00 0.00 7.00 0.34 0.00 0.00 7.25 0.36 0.00 0.00 7.50 0.37 0.00 0.00 7.75 0.39 0.00 0.00 8.00 0.41 0.00 0.00 8.25 0.43 0.01 0.00 8.50 0.45 0.01 0.00 8.75 0.48 0.01 0.00 9.00 0.50 0.02 0.01 9.25 0.53 0.02 0.01 9.50 0.56 0.03 0.01 9.75 0.59 0.04 0.01 10.00 0.62 0.04 0.01 10.25 0.66 0.06 0.01 10.50 0.70 0.07 0.02 10.75 0.75 0.09 0.02 11.00 0.80 0.11 0.03 11.25 0.88 0.14 0.04 11.50 0.97 0.18 0.06 11.75 1.32 0.38 0.30 12.00 2.27 1.06 1.04 12.25 2.41 1.17 0.15 12.50 2.51 1.25 0.10 12.75 2.58 1.31 0.07 13.00 2.64 1.36 0.06 13.25 2.69 1.40 0.05 13.50 2.73 1.44 0.05 13.75 2.77 1.47 0.04 14.00 2.80 1.50 0.04 14.25 2.84 1.52 0.03 14.50 2.86 1.55 0.03 14.75 2.89 1.57 0.03 15.00 2.92 1.59 0.03 15.25 2.94 1.61 0.03 15.50 2.97 1.63 0.03 15.75 2.99 1.65 0.02 16.00 3.01 1.67 0.02 16.25 3.03 1.69 0.02 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 16.50 3.05 1.70 0.02 16.75 3.07 1.72 0.02 17.00 3.08 1.73 0.02 17.25 3.10 1.75 0.02 17.50 3.12 1.76 0.02 17.75 3.13 1.78 0.02 18.00 3.15 1.79 0.02 18.25 3.16 1.80 0.02 18.50 3.18 1.82 0.02 18.75 3.19 1.83 0.02 19.00 3.21 1.84 0.01 19.25 3.22 1.85 0.01 19.50 3.23 1.86 0.01 19.75 3.24 1.87 0.01 20.00 3.26 1.88 0.01 20.25 3.27 1.89 0.01 20.50 3.28 1.90 0.01 20.75 3.29 1.91 0.01 21.00 3.30 1.92 0.01 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 10-yr Rainfall=3.42"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 18HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Rain Garden Inflow Area =0.317 ac,37.15% Impervious, Inflow Depth > 1.92" for 10-yr event Inflow =1.09 cfs @ 11.97 hrs, Volume=0.051 af Outflow =0.67 cfs @ 12.06 hrs, Volume=0.050 af, Atten= 39%, Lag= 5.3 min Primary =0.29 cfs @ 12.06 hrs, Volume=0.046 af Secondary =0.38 cfs @ 12.06 hrs, Volume=0.005 af Routing by Dyn-Stor-Ind method, Time Span= 3.00-21.00 hrs, dt= 0.05 hrs Peak Elev= 762.23' @ 12.06 hrs Surf.Area= 677 sf Storage= 529 cf Plug-Flow detention time= 16.3 min calculated for 0.050 af (99% of inflow) Center-of-Mass det. time= 12.4 min ( 798.8 - 786.4 ) Volume Invert Avail.Storage Storage Description #1 760.84'850 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet)(sq-ft)(%)(cubic-feet)(cubic-feet) 760.84 650 0.0 0 0 761.16 650 40.0 83 83 761.17 650 20.0 1 84 761.66 650 20.0 64 148 761.67 650 100.0 6 155 762.70 700 100.0 695 850 Device Routing Invert Outlet Devices #1 Primary 760.84'4.0" Round Culvert L= 29.0' CPP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 760.84' / 760.00' S= 0.0290 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.09 sf #2 Secondary 762.00'1.3' long x 2.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 Coef. (English) 2.54 2.61 2.61 2.60 2.66 2.70 2.77 2.89 2.88 2.85 3.07 3.20 3.32 Primary OutFlow Max=0.29 cfs @ 12.06 hrs HW=762.23' (Free Discharge) 1=Culvert (Barrel Controls 0.29 cfs @ 3.36 fps) Secondary OutFlow Max=0.36 cfs @ 12.06 hrs HW=762.23' (Free Discharge) 2=Broad-Crested Rectangular Weir (Weir Controls 0.36 cfs @ 1.22 fps) This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 10-yr Rainfall=3.42"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 19HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Pond 1P: Rain Garden Inflow Outflow Primary Secondary Hydrograph Time (hours) 2120191817161514131211109876543 Fl o w ( c f s ) 1 0 Inflow Area=0.317 ac Peak Elev=762.23' Storage=529 cf 1.09 cfs 0.67 cfs 0.29 cfs0.38 cfs Pond 1P: Rain Garden Total Primary Secondary Stage-Discharge Discharge (cfs) 210 El e v a t i o n ( f e e t ) 762 761 Culvert Broad-Crested Rectangular Weir This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 10-yr Rainfall=3.42"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 20HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Pond 1P: Rain Garden Surface Storage Stage-Area-Storage Storage (cubic-feet) 8007006005004003002001000 Surface/Horizontal/Wetted Area (sq-ft) 700650600550500450400350300250200150100500 El e v a t i o n ( f e e t ) 762 761 Custom Stage Data This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 10-yr Rainfall=3.42"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 21HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Hydrograph for Pond 1P: Rain Garden Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Outflow (cfs) Primary (cfs) Secondary (cfs) 3.00 0.00 0 760.84 0.00 0.00 0.00 3.50 0.00 0 760.84 0.00 0.00 0.00 4.00 0.00 0 760.84 0.00 0.00 0.00 4.50 0.00 0 760.84 0.00 0.00 0.00 5.00 0.00 0 760.84 0.00 0.00 0.00 5.50 0.00 0 760.84 0.00 0.00 0.00 6.00 0.00 0 760.84 0.00 0.00 0.00 6.50 0.00 0 760.84 0.00 0.00 0.00 7.00 0.00 0 760.84 0.00 0.00 0.00 7.50 0.00 1 760.84 0.00 0.00 0.00 8.00 0.00 4 760.85 0.00 0.00 0.00 8.50 0.00 7 760.87 0.00 0.00 0.00 9.00 0.01 11 760.88 0.00 0.00 0.00 9.50 0.01 14 760.89 0.01 0.01 0.00 10.00 0.01 17 760.90 0.01 0.01 0.00 10.50 0.02 21 760.92 0.02 0.02 0.00 11.00 0.03 27 760.94 0.03 0.03 0.00 11.50 0.06 39 760.99 0.05 0.05 0.00 12.00 1.04 481 762.16 0.50 0.29 0.22 12.50 0.10 259 761.83 0.26 0.26 0.00 13.00 0.06 50 761.03 0.08 0.08 0.00 13.50 0.05 38 760.99 0.05 0.05 0.00 14.00 0.04 34 760.97 0.04 0.04 0.00 14.50 0.03 31 760.96 0.03 0.03 0.00 15.00 0.03 30 760.95 0.03 0.03 0.00 15.50 0.03 28 760.95 0.03 0.03 0.00 16.00 0.02 26 760.94 0.02 0.02 0.00 16.50 0.02 25 760.94 0.02 0.02 0.00 17.00 0.02 24 760.93 0.02 0.02 0.00 17.50 0.02 24 760.93 0.02 0.02 0.00 18.00 0.02 23 760.93 0.02 0.02 0.00 18.50 0.02 22 760.92 0.02 0.02 0.00 19.00 0.01 21 760.92 0.02 0.02 0.00 19.50 0.01 21 760.92 0.01 0.01 0.00 20.00 0.01 20 760.92 0.01 0.01 0.00 20.50 0.01 19 760.91 0.01 0.01 0.00 21.00 0.01 19 760.91 0.01 0.01 0.00 This document was created by an application that isn’t licensed to use novaPDF. 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Type II 24-hr 10-yr Rainfall=3.42"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 22HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Stage-Discharge for Pond 1P: Rain Garden Elevation (feet) Discharge (cfs) Primary (cfs) Secondary (cfs) 760.84 0.00 0.00 0.00 760.86 0.00 0.00 0.00 760.88 0.00 0.00 0.00 760.90 0.01 0.01 0.00 760.92 0.01 0.01 0.00 760.94 0.02 0.02 0.00 760.96 0.03 0.03 0.00 760.98 0.04 0.04 0.00 761.00 0.06 0.06 0.00 761.02 0.07 0.07 0.00 761.04 0.08 0.08 0.00 761.06 0.10 0.10 0.00 761.08 0.11 0.11 0.00 761.10 0.13 0.13 0.00 761.12 0.14 0.14 0.00 761.14 0.15 0.15 0.00 761.16 0.17 0.17 0.00 761.18 0.17 0.17 0.00 761.20 0.18 0.18 0.00 761.22 0.19 0.19 0.00 761.24 0.20 0.20 0.00 761.26 0.21 0.21 0.00 761.28 0.21 0.21 0.00 761.30 0.21 0.21 0.00 761.32 0.21 0.21 0.00 761.34 0.21 0.21 0.00 761.36 0.22 0.22 0.00 761.38 0.22 0.22 0.00 761.40 0.22 0.22 0.00 761.42 0.22 0.22 0.00 761.44 0.22 0.22 0.00 761.46 0.23 0.23 0.00 761.48 0.23 0.23 0.00 761.50 0.23 0.23 0.00 761.52 0.23 0.23 0.00 761.54 0.23 0.23 0.00 761.56 0.24 0.24 0.00 761.58 0.24 0.24 0.00 761.60 0.24 0.24 0.00 761.62 0.24 0.24 0.00 761.64 0.24 0.24 0.00 761.66 0.25 0.25 0.00 761.68 0.25 0.25 0.00 761.70 0.25 0.25 0.00 761.72 0.25 0.25 0.00 761.74 0.25 0.25 0.00 761.76 0.25 0.25 0.00 761.78 0.26 0.26 0.00 761.80 0.26 0.26 0.00 761.82 0.26 0.26 0.00 761.84 0.26 0.26 0.00 761.86 0.26 0.26 0.00 761.88 0.26 0.26 0.00 761.90 0.27 0.27 0.00 Elevation (feet) Discharge (cfs) Primary (cfs) Secondary (cfs) 761.92 0.27 0.27 0.00 761.94 0.27 0.27 0.00 761.96 0.27 0.27 0.00 761.98 0.27 0.27 0.00 762.00 0.27 0.27 0.00 762.02 0.29 0.28 0.01 762.04 0.30 0.28 0.03 762.06 0.33 0.28 0.05 762.08 0.36 0.28 0.07 762.10 0.39 0.28 0.10 762.12 0.42 0.28 0.14 762.14 0.46 0.29 0.17 762.16 0.50 0.29 0.21 762.18 0.54 0.29 0.25 762.20 0.59 0.29 0.30 762.22 0.63 0.29 0.34 762.24 0.68 0.29 0.39 762.26 0.74 0.30 0.44 762.28 0.79 0.30 0.49 762.30 0.85 0.30 0.55 762.32 0.91 0.30 0.61 762.34 0.97 0.30 0.67 762.36 1.03 0.30 0.73 762.38 1.10 0.30 0.79 762.40 1.16 0.31 0.86 762.42 1.23 0.31 0.92 762.44 1.30 0.31 0.99 762.46 1.37 0.31 1.06 762.48 1.44 0.31 1.13 762.50 1.51 0.31 1.20 762.52 1.59 0.31 1.27 762.54 1.66 0.32 1.35 762.56 1.74 0.32 1.42 762.58 1.82 0.32 1.50 762.60 1.90 0.32 1.58 762.62 1.98 0.32 1.66 762.64 2.06 0.32 1.74 762.66 2.14 0.32 1.82 762.68 2.23 0.33 1.90 762.70 2.31 0.33 1.98 This document was created by an application that isn’t licensed to use novaPDF. 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Type II 24-hr 10-yr Rainfall=3.42"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 23HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 1P: Rain Garden Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 760.84 650 0 760.86 650 5 760.88 650 10 760.90 650 16 760.92 650 21 760.94 650 26 760.96 650 31 760.98 650 36 761.00 650 42 761.02 650 47 761.04 650 52 761.06 650 57 761.08 650 62 761.10 650 68 761.12 650 73 761.14 650 78 761.16 650 83 761.18 650 86 761.20 650 88 761.22 650 91 761.24 650 94 761.26 650 96 761.28 650 99 761.30 650 101 761.32 650 104 761.34 650 107 761.36 650 109 761.38 650 112 761.40 650 114 761.42 650 117 761.44 650 120 761.46 650 122 761.48 650 125 761.50 650 127 761.52 650 130 761.54 650 133 761.56 650 135 761.58 650 138 761.60 650 140 761.62 650 143 761.64 650 146 761.66 650 148 761.68 650 161 761.70 651 174 761.72 652 187 761.74 653 200 761.76 654 213 761.78 655 226 761.80 656 240 761.82 657 253 761.84 658 266 761.86 659 279 761.88 660 292 761.90 661 305 Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 761.92 662 319 761.94 663 332 761.96 664 345 761.98 665 359 762.00 666 372 762.02 667 385 762.04 668 399 762.06 669 412 762.08 670 425 762.10 671 439 762.12 672 452 762.14 673 466 762.16 674 479 762.18 675 493 762.20 676 506 762.22 677 520 762.24 678 533 762.26 679 547 762.28 680 560 762.30 681 574 762.32 682 587 762.34 683 601 762.36 683 615 762.38 684 628 762.40 685 642 762.42 686 656 762.44 687 670 762.46 688 683 762.48 689 697 762.50 690 711 762.52 691 725 762.54 692 739 762.56 693 752 762.58 694 766 762.60 695 780 762.62 696 794 762.64 697 808 762.66 698 822 762.68 699 836 762.70 700 850 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 100-yr Rainfall=5.90"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 24HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Time span=3.00-21.00 hrs, dt=0.05 hrs, 361 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=13,808 sf 37.15% Impervious Runoff Depth>4.11"Subcatchment 1S: Project Area Tc=6.0 min CN=86 Runoff=2.25 cfs 0.109 af Peak Elev=762.62' Storage=794 cf Inflow=2.25 cfs 0.109 afPond 1P: Rain Garden Primary=0.32 cfs 0.078 af Secondary=1.65 cfs 0.030 af Outflow=1.98 cfs 0.108 af Total Runoff Area = 0.317 ac Runoff Volume = 0.109 af Average Runoff Depth = 4.11" 62.85% Pervious = 0.199 ac 37.15% Impervious = 0.118 ac This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 100-yr Rainfall=5.90"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 25HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Project Area Runoff =2.25 cfs @ 11.97 hrs, Volume=0.109 af, Depth>4.11" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 3.00-21.00 hrs, dt= 0.05 hrs Type II 24-hr 100-yr Rainfall=5.90" Area (sf)CN Description 8,679 79 Woods/grass comb., Good, HSG D 2,700 98 Unconnected roofs, HSG D 2,429 98 Paved parking, HSG D 13,808 86 Weighted Average 8,679 62.85% Pervious Area 5,129 37.15% Impervious Area 2,700 52.64% Unconnected Tc Length Slope Velocity Capacity Description (min)(feet)(ft/ft)(ft/sec)(cfs) 6.0 Direct Entry, Subcatchment 1S: Project Area Runoff Hydrograph Time (hours) 2120191817161514131211109876543 Fl o w ( c f s ) 2 1 0 Type II 24-hr 100-yr Rainfall=5.90" Runoff Area=13,808 sf Runoff Volume=0.109 af Runoff Depth>4.11" Tc=6.0 min CN=86 2.25 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 100-yr Rainfall=5.90"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 26HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Project Area Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 3.00 0.20 0.00 0.00 3.25 0.22 0.00 0.00 3.50 0.24 0.00 0.00 3.75 0.26 0.00 0.00 4.00 0.28 0.00 0.00 4.25 0.30 0.00 0.00 4.50 0.33 0.00 0.00 4.75 0.35 0.00 0.00 5.00 0.37 0.00 0.00 5.25 0.40 0.00 0.00 5.50 0.42 0.01 0.00 5.75 0.45 0.01 0.00 6.00 0.47 0.01 0.01 6.25 0.50 0.02 0.01 6.50 0.53 0.02 0.01 6.75 0.55 0.03 0.01 7.00 0.58 0.04 0.01 7.25 0.61 0.04 0.01 7.50 0.64 0.05 0.01 7.75 0.68 0.06 0.01 8.00 0.71 0.07 0.01 8.25 0.74 0.08 0.02 8.50 0.78 0.10 0.02 8.75 0.82 0.12 0.02 9.00 0.87 0.14 0.03 9.25 0.91 0.16 0.03 9.50 0.96 0.18 0.03 9.75 1.01 0.20 0.03 10.00 1.07 0.23 0.04 10.25 1.13 0.27 0.04 10.50 1.20 0.31 0.05 10.75 1.29 0.36 0.07 11.00 1.39 0.42 0.08 11.25 1.51 0.50 0.11 11.50 1.67 0.61 0.14 11.75 2.28 1.07 0.70 12.00 3.91 2.47 2.10 12.25 4.17 2.70 0.29 12.50 4.34 2.85 0.19 12.75 4.46 2.96 0.14 13.00 4.55 3.05 0.11 13.25 4.64 3.13 0.10 13.50 4.71 3.20 0.09 13.75 4.78 3.26 0.08 14.00 4.84 3.32 0.07 14.25 4.89 3.37 0.06 14.50 4.94 3.41 0.06 14.75 4.99 3.46 0.06 15.00 5.04 3.50 0.05 15.25 5.08 3.54 0.05 15.50 5.12 3.58 0.05 15.75 5.16 3.61 0.04 16.00 5.19 3.65 0.04 16.25 5.23 3.68 0.04 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 16.50 5.26 3.71 0.04 16.75 5.29 3.74 0.04 17.00 5.32 3.77 0.04 17.25 5.35 3.79 0.04 17.50 5.38 3.82 0.03 17.75 5.41 3.85 0.03 18.00 5.43 3.87 0.03 18.25 5.46 3.90 0.03 18.50 5.49 3.92 0.03 18.75 5.51 3.94 0.03 19.00 5.53 3.97 0.03 19.25 5.56 3.99 0.03 19.50 5.58 4.01 0.03 19.75 5.60 4.03 0.02 20.00 5.62 4.05 0.02 20.25 5.64 4.06 0.02 20.50 5.65 4.08 0.02 20.75 5.67 4.10 0.02 21.00 5.69 4.12 0.02 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 100-yr Rainfall=5.90"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 27HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Rain Garden Inflow Area =0.317 ac,37.15% Impervious, Inflow Depth > 4.11" for 100-yr event Inflow =2.25 cfs @ 11.97 hrs, Volume=0.109 af Outflow =1.98 cfs @ 12.01 hrs, Volume=0.108 af, Atten= 12%, Lag= 2.7 min Primary =0.32 cfs @ 12.01 hrs, Volume=0.078 af Secondary =1.65 cfs @ 12.01 hrs, Volume=0.030 af Routing by Dyn-Stor-Ind method, Time Span= 3.00-21.00 hrs, dt= 0.05 hrs Peak Elev= 762.62' @ 12.01 hrs Surf.Area= 696 sf Storage= 794 cf Plug-Flow detention time= 12.7 min calculated for 0.108 af (99% of inflow) Center-of-Mass det. time= 10.1 min ( 778.0 - 767.9 ) Volume Invert Avail.Storage Storage Description #1 760.84'850 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet)(sq-ft)(%)(cubic-feet)(cubic-feet) 760.84 650 0.0 0 0 761.16 650 40.0 83 83 761.17 650 20.0 1 84 761.66 650 20.0 64 148 761.67 650 100.0 6 155 762.70 700 100.0 695 850 Device Routing Invert Outlet Devices #1 Primary 760.84'4.0" Round Culvert L= 29.0' CPP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 760.84' / 760.00' S= 0.0290 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.09 sf #2 Secondary 762.00'1.3' long x 2.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 Coef. (English) 2.54 2.61 2.61 2.60 2.66 2.70 2.77 2.89 2.88 2.85 3.07 3.20 3.32 Primary OutFlow Max=0.32 cfs @ 12.01 hrs HW=762.61' (Free Discharge) 1=Culvert (Barrel Controls 0.32 cfs @ 3.68 fps) Secondary OutFlow Max=1.61 cfs @ 12.01 hrs HW=762.61' (Free Discharge) 2=Broad-Crested Rectangular Weir (Weir Controls 1.61 cfs @ 2.04 fps) This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 100-yr Rainfall=5.90"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 28HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Pond 1P: Rain Garden Inflow Outflow Primary Secondary Hydrograph Time (hours) 2120191817161514131211109876543 Fl o w ( c f s ) 2 1 0 Inflow Area=0.317 ac Peak Elev=762.62' Storage=794 cf 2.25 cfs 1.98 cfs 0.32 cfs 1.65 cfs Pond 1P: Rain Garden Total Primary Secondary Stage-Discharge Discharge (cfs) 210 El e v a t i o n ( f e e t ) 762 761 Culvert Broad-Crested Rectangular Weir This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 100-yr Rainfall=5.90"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 29HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Pond 1P: Rain Garden Surface Storage Stage-Area-Storage Storage (cubic-feet) 8007006005004003002001000 Surface/Horizontal/Wetted Area (sq-ft) 700650600550500450400350300250200150100500 El e v a t i o n ( f e e t ) 762 761 Custom Stage Data This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. Type II 24-hr 100-yr Rainfall=5.90"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 30HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Hydrograph for Pond 1P: Rain Garden Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Outflow (cfs) Primary (cfs) Secondary (cfs) 3.00 0.00 0 760.84 0.00 0.00 0.00 3.50 0.00 0 760.84 0.00 0.00 0.00 4.00 0.00 0 760.84 0.00 0.00 0.00 4.50 0.00 0 760.84 0.00 0.00 0.00 5.00 0.00 1 760.84 0.00 0.00 0.00 5.50 0.00 5 760.86 0.00 0.00 0.00 6.00 0.01 9 760.87 0.00 0.00 0.00 6.50 0.01 13 760.89 0.01 0.01 0.00 7.00 0.01 15 760.90 0.01 0.01 0.00 7.50 0.01 18 760.91 0.01 0.01 0.00 8.00 0.01 19 760.91 0.01 0.01 0.00 8.50 0.02 22 760.93 0.02 0.02 0.00 9.00 0.03 26 760.94 0.02 0.02 0.00 9.50 0.03 29 760.95 0.03 0.03 0.00 10.00 0.04 32 760.96 0.03 0.03 0.00 10.50 0.05 39 760.99 0.05 0.05 0.00 11.00 0.08 48 761.03 0.07 0.07 0.00 11.50 0.14 69 761.10 0.13 0.13 0.00 12.00 2.10 792 762.62 1.97 0.32 1.64 12.50 0.19 373 762.00 0.28 0.27 0.00 13.00 0.11 154 761.67 0.25 0.25 0.00 13.50 0.09 56 761.05 0.09 0.09 0.00 14.00 0.07 48 761.02 0.07 0.07 0.00 14.50 0.06 44 761.01 0.06 0.06 0.00 15.00 0.05 41 761.00 0.06 0.06 0.00 15.50 0.05 39 760.99 0.05 0.05 0.00 16.00 0.04 36 760.98 0.04 0.04 0.00 16.50 0.04 34 760.97 0.04 0.04 0.00 17.00 0.04 33 760.97 0.04 0.04 0.00 17.50 0.03 32 760.96 0.04 0.04 0.00 18.00 0.03 31 760.96 0.03 0.03 0.00 18.50 0.03 30 760.96 0.03 0.03 0.00 19.00 0.03 29 760.95 0.03 0.03 0.00 19.50 0.03 28 760.95 0.03 0.03 0.00 20.00 0.02 27 760.94 0.02 0.02 0.00 20.50 0.02 26 760.94 0.02 0.02 0.00 21.00 0.02 26 760.94 0.02 0.02 0.00 This document was created by an application that isn’t licensed to use novaPDF. 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Type II 24-hr 100-yr Rainfall=5.90"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 31HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Stage-Discharge for Pond 1P: Rain Garden Elevation (feet) Discharge (cfs) Primary (cfs) Secondary (cfs) 760.84 0.00 0.00 0.00 760.86 0.00 0.00 0.00 760.88 0.00 0.00 0.00 760.90 0.01 0.01 0.00 760.92 0.01 0.01 0.00 760.94 0.02 0.02 0.00 760.96 0.03 0.03 0.00 760.98 0.04 0.04 0.00 761.00 0.06 0.06 0.00 761.02 0.07 0.07 0.00 761.04 0.08 0.08 0.00 761.06 0.10 0.10 0.00 761.08 0.11 0.11 0.00 761.10 0.13 0.13 0.00 761.12 0.14 0.14 0.00 761.14 0.15 0.15 0.00 761.16 0.17 0.17 0.00 761.18 0.17 0.17 0.00 761.20 0.18 0.18 0.00 761.22 0.19 0.19 0.00 761.24 0.20 0.20 0.00 761.26 0.21 0.21 0.00 761.28 0.21 0.21 0.00 761.30 0.21 0.21 0.00 761.32 0.21 0.21 0.00 761.34 0.21 0.21 0.00 761.36 0.22 0.22 0.00 761.38 0.22 0.22 0.00 761.40 0.22 0.22 0.00 761.42 0.22 0.22 0.00 761.44 0.22 0.22 0.00 761.46 0.23 0.23 0.00 761.48 0.23 0.23 0.00 761.50 0.23 0.23 0.00 761.52 0.23 0.23 0.00 761.54 0.23 0.23 0.00 761.56 0.24 0.24 0.00 761.58 0.24 0.24 0.00 761.60 0.24 0.24 0.00 761.62 0.24 0.24 0.00 761.64 0.24 0.24 0.00 761.66 0.25 0.25 0.00 761.68 0.25 0.25 0.00 761.70 0.25 0.25 0.00 761.72 0.25 0.25 0.00 761.74 0.25 0.25 0.00 761.76 0.25 0.25 0.00 761.78 0.26 0.26 0.00 761.80 0.26 0.26 0.00 761.82 0.26 0.26 0.00 761.84 0.26 0.26 0.00 761.86 0.26 0.26 0.00 761.88 0.26 0.26 0.00 761.90 0.27 0.27 0.00 Elevation (feet) Discharge (cfs) Primary (cfs) Secondary (cfs) 761.92 0.27 0.27 0.00 761.94 0.27 0.27 0.00 761.96 0.27 0.27 0.00 761.98 0.27 0.27 0.00 762.00 0.27 0.27 0.00 762.02 0.29 0.28 0.01 762.04 0.30 0.28 0.03 762.06 0.33 0.28 0.05 762.08 0.36 0.28 0.07 762.10 0.39 0.28 0.10 762.12 0.42 0.28 0.14 762.14 0.46 0.29 0.17 762.16 0.50 0.29 0.21 762.18 0.54 0.29 0.25 762.20 0.59 0.29 0.30 762.22 0.63 0.29 0.34 762.24 0.68 0.29 0.39 762.26 0.74 0.30 0.44 762.28 0.79 0.30 0.49 762.30 0.85 0.30 0.55 762.32 0.91 0.30 0.61 762.34 0.97 0.30 0.67 762.36 1.03 0.30 0.73 762.38 1.10 0.30 0.79 762.40 1.16 0.31 0.86 762.42 1.23 0.31 0.92 762.44 1.30 0.31 0.99 762.46 1.37 0.31 1.06 762.48 1.44 0.31 1.13 762.50 1.51 0.31 1.20 762.52 1.59 0.31 1.27 762.54 1.66 0.32 1.35 762.56 1.74 0.32 1.42 762.58 1.82 0.32 1.50 762.60 1.90 0.32 1.58 762.62 1.98 0.32 1.66 762.64 2.06 0.32 1.74 762.66 2.14 0.32 1.82 762.68 2.23 0.33 1.90 762.70 2.31 0.33 1.98 This document was created by an application that isn’t licensed to use novaPDF. 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Type II 24-hr 100-yr Rainfall=5.90"PROPOSED WATERHSED ANALYSIS Printed 3/22/2022Prepared by 893 Highland Road Page 32HydroCAD® 10.10-5a s/n 05659 © 2020 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 1P: Rain Garden Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 760.84 650 0 760.86 650 5 760.88 650 10 760.90 650 16 760.92 650 21 760.94 650 26 760.96 650 31 760.98 650 36 761.00 650 42 761.02 650 47 761.04 650 52 761.06 650 57 761.08 650 62 761.10 650 68 761.12 650 73 761.14 650 78 761.16 650 83 761.18 650 86 761.20 650 88 761.22 650 91 761.24 650 94 761.26 650 96 761.28 650 99 761.30 650 101 761.32 650 104 761.34 650 107 761.36 650 109 761.38 650 112 761.40 650 114 761.42 650 117 761.44 650 120 761.46 650 122 761.48 650 125 761.50 650 127 761.52 650 130 761.54 650 133 761.56 650 135 761.58 650 138 761.60 650 140 761.62 650 143 761.64 650 146 761.66 650 148 761.68 650 161 761.70 651 174 761.72 652 187 761.74 653 200 761.76 654 213 761.78 655 226 761.80 656 240 761.82 657 253 761.84 658 266 761.86 659 279 761.88 660 292 761.90 661 305 Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 761.92 662 319 761.94 663 332 761.96 664 345 761.98 665 359 762.00 666 372 762.02 667 385 762.04 668 399 762.06 669 412 762.08 670 425 762.10 671 439 762.12 672 452 762.14 673 466 762.16 674 479 762.18 675 493 762.20 676 506 762.22 677 520 762.24 678 533 762.26 679 547 762.28 680 560 762.30 681 574 762.32 682 587 762.34 683 601 762.36 683 615 762.38 684 628 762.40 685 642 762.42 686 656 762.44 687 670 762.46 688 683 762.48 689 697 762.50 690 711 762.52 691 725 762.54 692 739 762.56 693 752 762.58 694 766 762.60 695 780 762.62 696 794 762.64 697 808 762.66 698 822 762.68 699 836 762.70 700 850 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice. 3/9/22, 1:10 PM Extreme Precipitation Tables: 42.473°N, 76.494°W precip.eas.cornell.edu/data.php?1646849414997 1/1 Extreme Precipitation Tables Northeast Regional Climate Center Data represents point estimates calculated from partial duration series. All precipitation amounts are displayed in inches. Smoothing Yes State New York Location Longitude 76.494 degrees West Latitude 42.473 degrees North Elevation 0 feet Date/Time Wed, 09 Mar 2022 13:10:16 -0500 Extreme Precipitation Estimates 5min 10min 15min 30min 60min 120min 1hr 2hr 3hr 6hr 12hr 24hr 48hr 1day 2day 4day 7day 10day 1yr 0.28 0.43 0.53 0.70 0.87 1.07 1yr 0.75 0.95 1.21 1.44 1.71 2.00 2.26 1yr 1.77 2.17 2.57 3.10 3.56 1yr 2yr 0.32 0.50 0.62 0.81 1.02 1.26 2yr 0.88 1.12 1.42 1.70 2.00 2.34 2.61 2yr 2.07 2.51 2.94 3.49 3.99 2yr 5yr 0.38 0.59 0.74 0.99 1.26 1.57 5yr 1.09 1.39 1.78 2.12 2.50 2.90 3.24 5yr 2.57 3.12 3.63 4.21 4.81 5yr 10yr 0.42 0.66 0.84 1.14 1.48 1.85 10yr 1.28 1.63 2.11 2.52 2.95 3.42 3.82 10yr 3.03 3.68 4.26 4.86 5.54 10yr 25yr 0.50 0.79 1.00 1.38 1.84 2.31 25yr 1.59 2.02 2.63 3.15 3.68 4.25 4.75 25yr 3.76 4.57 5.25 5.87 6.69 25yr 50yr 0.56 0.90 1.15 1.60 2.16 2.73 50yr 1.86 2.38 3.12 3.73 4.35 5.00 5.61 50yr 4.43 5.40 6.17 6.77 7.71 50yr 100yr 0.63 1.02 1.31 1.86 2.54 3.23 100yr 2.19 2.81 3.70 4.42 5.15 5.90 6.63 100yr 5.22 6.37 7.24 7.81 8.89 100yr 200yr 0.72 1.17 1.51 2.17 2.99 3.82 200yr 2.58 3.31 4.38 5.23 6.08 6.96 7.82 200yr 6.16 7.52 8.50 9.02 10.25 200yr 500yr 0.85 1.40 1.82 2.65 3.71 4.77 500yr 3.20 4.12 5.48 6.54 7.59 8.65 9.75 500yr 7.66 9.38 10.52 10.90 12.39 500yr Lower Confidence Limits 5min 10min 15min 30min 60min 120min 1hr 2hr 3hr 6hr 12hr 24hr 48hr 1day 2day 4day 7day 10day 1yr 0.25 0.39 0.47 0.64 0.78 0.82 1yr 0.67 0.80 0.94 1.07 1.51 1.89 2.10 1yr 1.67 2.02 2.42 2.93 3.26 1yr 2yr 0.32 0.49 0.61 0.82 1.01 1.12 2yr 0.87 1.09 1.24 1.53 1.86 2.28 2.54 2yr 2.02 2.44 2.86 3.41 3.91 2yr 5yr 0.36 0.55 0.69 0.94 1.20 1.32 5yr 1.04 1.29 1.44 1.78 2.17 2.70 3.01 5yr 2.39 2.90 3.39 3.97 4.55 5yr 10yr 0.40 0.61 0.76 1.06 1.37 1.50 10yr 1.19 1.47 1.63 1.99 2.46 3.09 3.42 10yr 2.74 3.29 3.83 4.44 5.11 10yr 25yr 0.46 0.70 0.87 1.24 1.63 1.79 25yr 1.41 1.75 1.92 2.29 2.86 3.65 4.04 25yr 3.23 3.88 4.49 5.13 5.94 25yr 50yr 0.51 0.77 0.96 1.38 1.86 2.04 50yr 1.60 2.00 2.16 2.56 3.22 4.16 4.57 50yr 3.68 4.39 5.05 5.72 6.67 50yr 100yr 0.56 0.85 1.06 1.54 2.11 2.34 100yr 1.82 2.29 2.44 2.86 3.62 4.73 5.17 100yr 4.19 4.97 5.68 6.39 7.47 100yr 200yr 0.63 0.94 1.20 1.73 2.41 2.68 200yr 2.08 2.62 2.77 3.19 4.08 5.38 5.85 200yr 4.76 5.63 6.38 7.09 8.36 200yr 500yr 0.73 1.09 1.40 2.03 2.89 3.22 500yr 2.49 3.15 3.28 3.70 4.78 6.38 6.87 500yr 5.65 6.61 7.40 8.14 9.70 500yr Upper Confidence Limits 5min 10min 15min 30min 60min 120min 1hr 2hr 3hr 6hr 12hr 24hr 48hr 1day 2day 4day 7day 10day 1yr 0.30 0.47 0.57 0.77 0.94 1.03 1yr 0.81 1.01 1.16 1.43 1.77 2.11 2.38 1yr 1.87 2.29 2.71 3.26 3.74 1yr 2yr 0.34 0.52 0.64 0.87 1.07 1.18 2yr 0.92 1.16 1.31 1.63 1.98 2.42 2.70 2yr 2.14 2.60 3.04 3.59 4.10 2yr 5yr 0.40 0.62 0.76 1.05 1.34 1.52 5yr 1.15 1.49 1.68 2.05 2.53 3.11 3.47 5yr 2.75 3.34 3.87 4.48 5.11 5yr 10yr 0.46 0.71 0.88 1.23 1.59 1.85 10yr 1.37 1.81 2.03 2.46 3.05 3.78 4.24 10yr 3.35 4.08 4.68 5.31 6.06 10yr 25yr 0.57 0.86 1.07 1.53 2.01 2.40 25yr 1.74 2.35 2.62 3.14 3.92 4.90 5.50 25yr 4.33 5.29 6.01 6.66 7.59 25yr 50yr 0.66 1.00 1.25 1.80 2.42 2.91 50yr 2.09 2.85 3.17 3.77 4.75 5.95 6.70 50yr 5.27 6.44 7.28 7.92 9.01 50yr 100yr 0.77 1.16 1.46 2.11 2.89 3.54 100yr 2.49 3.46 3.83 4.56 5.73 7.24 8.17 100yr 6.41 7.86 8.84 9.44 10.69 100yr 200yr 0.90 1.35 1.71 2.48 3.45 4.31 200yr 2.98 4.21 4.64 5.48 6.93 8.81 9.98 200yr 7.80 9.59 10.74 11.23 12.70 200yr 500yr 1.11 1.65 2.12 3.08 4.38 5.57 500yr 3.78 5.45 5.98 6.98 8.94 11.43 13.00 500yr 10.12 12.50 13.94 14.18 15.96 500yr