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HomeMy WebLinkAbout2019-09-17 Stormwater Management Key Plan 8/13/19 1 SUTTON STREET ` E ...... . ....................... (PUBLIC•6V WIDE) i iz — —INFILTRATION SYSTEM 1 — ` — S-2 � y I � ; CB-1 , .. v..1 KEY: CB-1 AD AREA DRAIN CB-1 CB CATCH BASIN CDS HYDRODYNAMIC SEPARATOR DMH DRAIN MANHOLE RAT19 -1 Mo NRLT TD TRENCH DRAIN SYSTEM 2 J CDS-39 CB- fj } CB- OMH-1® i OCS--1 1 -CB- AD- AD-2 C I o r) DETENTION SYSTEM 12 ^�, > > I I _z� INFILTRATION SYSTEM OCS 2 a w _. . . �INFILTRATION TRENCH PLAN SCALE: 1" = 60' 0 30 60 120 The STORMWATER MANAGEMENT Morin- Cameron KEY PLAN GROUP , N � AT: 505 SUTTON STREET CIVIL ENGINEERS I ENVIRONMENTAL CONSULTANTS LAND SURVEYORS I LAND USE PLANNERS NORTH ANDOVER, MASSACHUSETTS R s7a777-& ,, 07ana 0,W.WWWAOORINCAM0194.COM AUGUST 13, 2019 i i I i May 16, 2019 Revised August 13, 2019 I i Stormwater Management CaLculations STANDARD 3: Recharge To Groundwater: Static Method (On site only) E • Calculate Impervious Area (From HydroCAD Model) Impervious Area HSG C Soil = 101,813 SF • Determine Rainfall Depth to be Recharged (MassDEP Stormwater Management Handbook; Table 2,32) Hydrologic Soil Group Recharge Rainfall Depth C 0.25" • Calculate Recharge Volume 'Rv' = [0.25" x 101,813 SF] 25,453 SF 'Rv' _ [25,453 SF1 / 12 SF--In = 2,122 CF 'Rv' = 2,122 CF • Capture Area Adjustment Schedule of Areas Tributary to Recharge Systems HCAD Tributary System ID Impervious Area 1 P 24,247 sf 2P 11,195 sf 3P 13,844 sf 5P 15,214 sf 6P 2,552 sf Total: 67,052 sf Total Impervious Area = 101,813 SF Capture Area Adjustment = 101,813 sf/ 67,052 sf 1.52 Required Recharge Volume 'Rv'= 1.52 x Rv = 1.52 x 2,122 CF = 3,226 CF May 16, 2019 Revised August 13, 2019 • Calculate Provided Recharge Schedule of Proposed Recharge System Volumes HCAD Bottom of Lowest System Total Recharge System System Outlet Volume Provided Description ID 1 P 162.00 162.50 292 Concrete Galleys 2P 162.00 162.90 465 Concrete Galleys 3P 162,50 163.50 359 Concrete Galleys 5P 165.50 167.00 2,156 Concrete Galleys 6P 169.00 170.50 70 Stone'Trench Total Volume: 3,342 CF Recharge volume provided measured to lowest system outlet. Required Recharge Volume Summary of Results Total Volume Provided Below Outlet = 3,342 CF Total Volume Required = 3,226 CF Verify Drawdown Maximum 72-Hours: Static Method Recharge Bottom Drawdown Time HCAD Volume Surface Rawls Rate ou Rv/ (K x A) - Description System ID (CF) Area (SF) inches/Hour Hours 1 P 292 1,460 1.02 2.4 Concrete Galleys 2P 465 900 1.02 6.1 Concrete Galleys 3P 359 612 1.02 6.9 Concrete Galleys 5P 2,156 2,116 1.02 12.0 Concrete Galleys 6P 70 116 1.02 7.1 Stone Trench "Design Complies with Recharge Volume Standard" • Sediment Forebay Sizing Sediment Forebay (For Detention System #1) Volume = 0.1" x 23,269 SF / 12 = 194 CF required 210 CF of storage provided at 167.5 GROUP, INC. • • 1 w ■■■�■■�■■■■■■■■■�■■■NE■■■■■■■■■■ ■■■i■■i■N■0■iiiiii iiiiii■ ■i ■■ii■F ■ � ■■■ !!i ■iii■iiiti'l� i is ■■■■■■■ ��■■■■■■ ■■■ .■ ■■■VA !'�■ii�'i���iiiiii■■�iii ■i■■■■■■i■i��i ■©iiii�iil�. ■�` ii� No ii ■ii0�■ ■�■■■■■■■■ ■i w � .ii■■i..■■■■■■■■■i■■ lP.lei■■i■■i■■■Ws ■■E3* ■�■■■■■■i■ ■ OEM■i■■■iiii■■■i■■■iii■■■■■■■■ ■ '■i■ii■■■■■■ENE■■iii■■■i■■■■■■■ ■i■it■■■■■■■■iiiiiiiiiiiii■iiii■ ■■■■■■■i■■■■ii■■■■■i■i■■ mom ■i ■■�■■■■■■iiiii■■iiAii■■i■i■i■■� ■ ■■■i■ii■■■ ill�i ���■■!r!'� ■�- ■■iii: i arm mom A ■i■■i ■ll■�l.�r ■moon ■■■■■ni ■■ra 01 ■NONE r■i■ vi■i■ ■ii■i■ i ■i■■O ■■■■■ iilli■ i1E!■i■is ■■■■■ No ■ ii■■■i■■■■WIS ■i■■■■■ ii■ i■i■■■■■ � ■■MEN i■■M■i ■X i HE ■■i■■ii■■■■ ■■i■■■■ 1 I i PS9 PS3 PS4 PS5 5P a--°�' PS11 PSB Rot It I 4P a"" P51 PSB 6vIP P51 P57 Retain It DP1 Retain It \ 1,, tlonTrench P51E1 —� 3P � � 2P 4-- P52 \rloP2 bP3 bP4 DP5 Retain It Retain It SUbC�t Reach On Link Routing Diagram for 605 Sutton Proposed Conditions Hydrologic Analysis Prepared by Microsoft, Printed 8/13/2019 HydroCADV 10.00-13 sfn 00401 O 2014 HydroCAD Software Solutions LLC 505 Sutton Proposed Conditions Hydrologic Analysis Type IU 24-hr I"Storm Rainfall=1.00" Prepared by Microsoft Printed 8/13/2019 ydroCAD® 10.00-13 s/n 00401 O 2014 HydroCAD Software Solutions LLC Paqe 2 Summary for Subcatchment PSI: Runoff - 0.43 cfs @ 12.09 hrs, Volume= 1,319 cf, Depth= 0.56" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 1" Storm Rainfall=1.00" Areas CN Description 3,170 74 >75% Grass cover, Good, HSG C 23,273 98 Paved parking, HSG C 661 98 Roofs, HSG C 987 98 Unconnected pavement, HSG C 28,091 95 Weighted Average 3,170 11.28% Pervious Area 24,921 88.72% Impervious Area 987 3.96% Unconnected Te Length Slope Velocity Capacity Description min feet ftfft fttsec cfs 6.0 Direct Entry, Summary for Subcatchment PSI0: Runoff = 0.28 cfs @ 12.08 hrs, Volume= 912 cf, Depth= 0.79" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 1" Storm Rainfall=1.00" Areas CN Description 13,844 98 Roofs, HSG C 13,844 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ftlsec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PSI1: Runoff - 0.31 cfs. @ 12.08 hrs, Volume= 1,003 cf, Depth= 0.79" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 1" Storm Rainfall=1.00" Areas CN Description 15,214 98 Roofs, HSG C 15,214 100.00% Impervious Area Ii I 505 Sutton Proposed Conditions Hydrologic Analysis Type 1/124-hr I"Storm Rainfall=1.00" Prepared by Microsoft Printed 8/13/2019 H droCAD® 10.00-13 s/n 00401 0 2014 H droCAD Software Solutions LLC Page 3 Tc Length Slope Velocity Capacity Description min feet tVft ft/sec cfs 6.0 Direct Entry, Summary for Subcatchment PSI2: Runoff = 0.00 cfs @ 14.78 hrs, Volume= 25 cf, Depth= 0.02" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 1" Storm Rainfall=1.00" Areas CN Description 12,822 74 >75% Grass cover, Good, HSG C 12,822 100.00% Pervious Area Tc Length Slope Velocity Capacity Description min feet ftlft ft/sec cfs 6.0 Direct Entry, Summary for Subcatchment PS2: Runoff - 0.19 cfs @ 12.09 hrs, Volume= 578 cf, Depth= 0.50" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type Ili 24-hr 1" Storm Rainfaii=1.00" Area (sD CN Description * 2,572 74 >76% Grass cover, Good, HSG C 6,226 98 Paved parking, HSG C 1,474 98 Roofs, HSG C 3,495 98 Unconnected pavement, HSG C 13,767 94 Weighted Average 2,572 18.68% Pervious Area 11,195 81.32% Impervious Area 3,495 31.22% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS3: Runoff - 0.08 cfs @ 12.09 hrs, Volume= 259 cf, Depth= 0.36" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type 111 24-hr 1" Storm Rainfall=1.00" i 505 Sutton Proposed Conditions Hydrologic Analysis Type Ill 24-hr 9"Storm Rainfall=1.00" Prepared by Microsoft Printed 8/13/2019 i i droCAD®10.00-13 sin 00401 0 2014 H droCAD Software Solutions LLC Page 4 Areas CN Descri tion 2,355 74 >76% Grass cover, Good, HSG C 5,874 98 Paved parking, HSG C 34 98 Roofs, HSG C 378 98 Unconnected pavement, HSG C 8,641 91 Weighted Average 2,355 27.25% Pervious Area 6,286 72.75% Impervious Area 378 6.01% Unconnected Tc Length Slope Velocity Capacity Description min feet ftlft ftlsec cfs 6.0 Direct Entry, Summary for Subcatchment PS4: Runoff - 0.01 cfs @ 12.32 hrs, Volume= 83 cf, Depth= 0.08" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 1" Storm Rainfall=1.00" _ Area (sf) CN Description 8,762 74 >75% Grass cover, Good, HSG C 3,160 98 Paved parking, HSG C 11,922 80 Weighted Average 8,762 73.49% Pervious Area 3,160 26.51% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet�(ftlft) (fUsec) (cfs,) 6.0 Direct Entry, Summary for Subcatchment PS5: Runoff - 0.07 cfs @ 12.10 hrs, Volume= 243 cf, Depth= 0.25" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 1" Storm Rainfall=1.00" Areas CN Description 4,846 74 >75% Grass cover, Good, HSG C 5,452 98 Paved parking, HSG C 95 98 Roofs, HSG C 1,133 98 Unconnected pavement, HSG C 11,526 88 Weighted Average" 4,846 42.04% Pervious Area 6,680 57.96% Impervious Area 1,133 16.96% Unconnected l I 3 505 Sutton Proposed Conditions Hydrologic Analysis Type Ill 24-hr I"Storm Rainfall=1.00" Prepared by Microsoft Printed 8/13/2019 H droCADO 10.00-13 sln 00401 O 2014 H droCAD Software Solutions LLC Page 5 I To Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 6.0 Direct Entry, _ . Summary for Subcatchment PS6: Runoff - 0.00 cfs @ 14.78 hrs, Volume= 10 of, Depth= 0.02" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36,00 hrs, dt= 0.01 hrs Type III 24-hr 1" Storm Rainfall=1.00" Area (sD CN Description 5,343 74 >75% Grass cover, Good, HSG C 5,343 100.00% Pervious Area To Length Slope Velocity Capacity Description (min) feet ftlft) (ftlsec) (cfs 6.0 Direct Entry, Summary for Subcatchment PS7: Runoff -- 0.00 cfs @ 14.78 hrs, Volume= 5 of, Depth= 0.02" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 1" Storm Rainfall=1.00" Areas CN Description 2,666 74 >75% Grass cover, Good, HSG C 2,666 100.00% Pervious Area To Length Slope Velocity Capacity Description min feet ftlft ftlsec cfs 6.0 Direct Entry, Summary for Subcatchment PS8: Runoff = 0.00 cfs @ 14.79 hrs, Volume= 40 of, Depth= 0.02" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 1" Storm Rainfall=1.00" Areas CN Description 20,900 74 >75% Grass cover, Good, HSG C 20,900 100,00% Pervious Area 505 Sutton Proposed Conditions Hydrologic Analysis Type I1124-hr I"Storm Rainfall=1.00" Prepared by Microsoft Printed 8/13/2019 H droCAD®10.00-13 s/n 00401 O 2014 H droCAD Software Solutions LLC Page 6 Tc Length Slope Velocity Capacity Description min feet ft/ft) (fUsec) (cfs 4.9 50 0.0300 0.17 Sheet Flow, Grass: Short n= 0.150 P2= 3.10" 1.3 210 0.0290 2.74 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 0.0 20 0.3500 9.52 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 6.2 280 Total Summary for Subcatchment PS8A: Runoff = 0.05 cfs @ 12.08 hrs, Volume= 168 cf, Depth= 0.79" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 1" Storm Rainfall=1.00" Areas CN Description 587 98 Roofs, HSG C 1,965 98 Unconnected pavement, HSG C 2,552 98 Weighted Average 2,652 100.00% Impervious Area 1,965 77.00% Unconnected Tc Length Slope Velocity Capacity Description min feet ft/ft ftlsec cfs 6.0 Direct Entry, Summary for Subcatchment PS9: Runoff = 0.37 cfs @ 12.08 hrs, Volume= 1,184 cf, Depth= 0.79" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 1" Storm Rainfall=1.00" Areas CN Description 17,961 98 Roofs, HSG C 17,961 100.00% Impervious Area Tc Length Slope Velocity Capacity Description min feet ftlft ftlseo cfs 6.0 Direct Entry, Summary for Reach DPI: [40) Hint; Not Described (Outflow=lnflow) Inflow Area = 126,309 sf, 78.69% Impervious, Inflow Depth > 0.17" for 1" Storm event Inflow -- 0.15 cfs @ 12.46 hrs, Volume= 1,809 cf Outflow = 0.15 cfs @ . 12.46 hrs, Volume= 1,809 cf, Atten= 0%, Lag= 0.0 min I 505 Sutton Proposed Conditions Hydrologic Analysis Type 111 24-hr I"Storm Rainfall=1.00" Prepared by Microsoft Printed 8/13/2019 H droCADO 10.00-13 sin 00401 0 2014 Ft droCAD Software Solutions LLC Page 7 Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs/3 Summary for Reach DP2: [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 23,452 sf, 10.88% Impervious, Inflow Depth = 0.02" for 1" Storm event Inflow = 0.00 cfs @ 12.55 hrs, Volume= 42 cf Outflow - 0.00 cfs @ 12.55 hrs, Volume= 42 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Summary for Reach DP3: [40] Hint: Not Described (Outflow=Inflow) Summary for Reach DP4: [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 12,822 sf, 0.00% Impervious, Inflow Depth = 0.02" for 1" Storm event Inflow - 0.00 cfs @ 14.78 hrs, Volume= 25 cf Outflow - 0.00 cfs @ 14.78 hrs, Volume= 25 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Summary for Reach DP5: [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 2,666 sf, 0.00% Impervious, Inflow Depth = 0.02" for 1" Storm event Inflow -- 0.00 cfs @ 14.78 hrs, Volume= 5 cf Outflow = 0.00 cfs @ 14.78 hrs, Volume= 5 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs/3 Summary for Pond 1 P: Retain It Inflow Area = 31,945 sf, 75.90% Impervious, Inflow Depth = 0,55" for 1" Storm event Inflow - 0.46 cfs @ 12.09 hrs, Volume= 1,453 of Outflow - 0.11 cfs @ 12.49 hrs, Volume= 1,453 cf, Atten= 76%, Lag= 24.0 min Discarded 0.03 cfs @ 11.75 hrs, Volume 1,226 cf Primary = 0.07 cfs @ 12.49 hrs, Volume= 228 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 505 Sutton Proposed Conditions Hydrologic Analysis Type It/24-hr I"Storm Rainfall=1.00" Prepared by Microsoft Printed 8/13/2019 H droCADO 10.00-13 sin 00401 O 2014 H droCAD Software Solutions LLC Page 8 Peak Elev= 162.66' @ 12.49 hrs Surf.Area= 1,460 sf Storage= 464 cf Plug-Flow detention time= 71.8 min calculated for 1,452 cf(100% of inflow) Center-of-Mass det. time= 71.8 min (873.7- 801.9 ) Volume Invert Avail.Stora a Storage Description #1A 162.00' 867 cf 146.00'W x 10.00'L x 5.17'H Field A 7,543 cf Overall - 5,376 cf Embedded = 2,167 cf x 40.0%Voids #2A 162.50' 3,870 of retain it 4.0' x 18 Inside#1 Inside=84.0"W x 48.0"H => 28.87 sf x 8.00'L = 230.9 cf Outside= 96.0"W x 56.0"H => 37.33 sf x 8.001 =298.7 cf 18 Rows adjusted for 286.9 cf perimeter wall 4,737 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 162.50' 12.0" Round Culvert L= 112.0' Ke= 0.600 Inlet/Outlet Invert= 162.50' / 153.84' S= 0.0773 '1' Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 162.50' 6.0"Vert. Orifice/Grate C= 0.600 #3 Device 1 164.50' 3.0"Vert. Orifice/Grate C= 0.600 #4 Device 1 166.40' 12.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #5 Discarded 162.00' 1.020 inlhr Exfiltration over Surface area Phase-In= 0.01' Discarded OutFtow Max=0.03 cfs @ 11.75 hrs HW=162.05' (Free Discharge) 'L5=Exfiltration (Exfiltration Controls 0.03 cfs) Primary OutFlow Max=0.07 cfs @ 12.49 hrs HW=162.66' TW=0.00' (Dynamic Tallwater) t-- =Culvert (Passes 0.07 cfs of 0.11 cfs potential flow) 2=Orifice/Grate (Orifice Controls 0.07 cfs @ 1.35 fps) 3=Orifice/Grate (Controls 0.00 cfs) =Orifice/Grate ( Controls 0.00 cfs) Summary for Pond 2P: Retain It Inflow Area = 13,767 sf, 81.32% Impervious, Inflow Depth = 0.50" for 1" Storm event Inflow = 0,19 cfs @ 12.09 hrs, Volume 578 cf Outflow - 0.02 cfs @ 11.88 hrs, Volume= 578 cf, Atten= 89%, Lag= 0.0 min Discarded = 0.02 cfs @ 11.88 hrs, Volume= 578 cf Primary - 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs/3 Peak Elev= 162.53' @ 12.90 hrs Surf.Area= 900 sf Storage= 201 cf Plug-Flow detention time= 76.3 min calculated for 578 cf(100% of inflow) Center-of-Mass det. time= 76.3 min ( 909.1 - 832.8 ) i 505 Sutton Proposed Conditions Hydrologic Analysis Type III 24-hr ?"Storm Rainfall=1.00" Prepared by Microsoft Printed 8/13/2019 ydroCADO 10.00-13 s/n 00401 ©2014 HydroCAD Software Solutions LLC Paae_9 Volume Invert Avail.Stora a Storage Description #1 A 162.00' 400 of 50.00'W x I B.00%x 4.67'H Field A 4,200 of Overall - 3,200 of Embedded = 1,000 of x 40.0% Voids #2A 162.50' 2,311 of retain_it 3.5' x 12 Inside#1 Inside= 84.0"W x 42.0"H => 25.10 sf x 8.00'L = 200.8 of Outside= 96.0"W x 50.0"H => 33.33 sf x 8.001 = 266.7 of 6 Rows adjusted for 98.2 of perimeter wall 2,711 of Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 162.50' 12.0" Round Culvert L= 23.0' Ke= 0.500 Inlet/Outlet Invert= 162.50' / 158.32' S= 0.1817 T Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 162.90' 4.0"Vert. Orifice/Grate C= 0.600 #3 Device 1 163.80' 3.0"Vert. Orifice/Grate C= 0.600 #4 Device 1 164.80' 4.0"Vert. Orifice/Grate C= 0.600 #5 Device 1 165.40' 12.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #6 Discarded 162.00' 1.020 Whir Exfiltratlon over Surface area Phase-In= 0.01' Discarded OutFlow Max=0.02 cfs @ 11.88 hrs HW=162.05' (Free Discharge) 't-6=Exfiltration (Exfiltration Controls 0.02 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=162.00' TW=0.00' (Dynamic Tailwater) t-- =Culvert ( Controls 0.00 cfs) 2=Orifice/Grate (Controls 0.00 cfs) 3=Orifice/Grate (Controls 0.00 cfs) =Orifice/Grate ( Controls 0.00 cfs) =Orifice/Grate ( Controls 0.00 cfs) Summary for Pond 3P: Retain It Inflow Area = 13,844 sf,100.00% Impervious, Inflow Depth = 0.79" for 1" Storm event Inflow 0.28 cfs @ 12.08 hrs, Volume= 912 of Outflow - 0.03 cfs @ 12.93 hrs, Volume= 912 of, Atten= 91%, Lag= 50.6 min Discarded = 0.01 cfs @ 11.30 hrs, Volume= 854 cf Primary 0.01 cfs @ 12.93 hrs, Volume= 59 of Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs/3 Peak Elev= 163.57' @ 12.93 hrs Surf.Area= 612 sf Storage= 393 of Plug-Flow detention time= 216.2 min calculated for 912 of(100% of inflow) Center-of-Mass det. time= 216.2 min ( 1,004.0-787.9) 505 Sutton Proposed Conditions Hydrologic Analysis Type 1/124-hr I"Storm Ralnfa11=1.00" Prepared by Microsoft Printed 8/13/2019 H droCADO 10.00-13 sin 00401 OO 2014 H droCAD Software Solutions LLC Pacle 10 Volume Invert Avail.Storage Storage Description #1A 162.50 249 cf 34.00 W x 18.00 L x 3.67 H Field A' �e A 2,244 cf Overall - 1,621 cf Embedded = 623 cf x 40.0% Voids #2A 163.00' 1,084 cf retain_it 2.5' x 8 Inside#1 Inside= 84.0"W x 30.0"H => 17.56 sf x 8,00'L = 140.4 cf Outside= 96.0"W x 38.0"H => 25.33 sf x 8.00'L= 202.7 cf 4_Rows adjusted for 39.6 cf perimeter wall 1,333 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 163.50' 12.0" Round Culvert L= 23.0' Ke= 0.500 Inlet/Outlet Invert= 163.50' / 158.32' S= 0.2252 '1' Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 163.50' 4.0"Vert. Orifice/Grate C= 0.600 43 Device 1 164.30' 6.0"Vert. Orifice/Grate C= 0.600 #4 Device 1 165.20' 12.0" Horiz. Orifice/Grate C= 0,600 Limited to weir flow at low heads #5 Discarded 162.50' 1.020 inthr Exfiltration over Surface area Phase-ln= 0.01' Discarded OutFlow Max=0.01 cfs @ 11.30 hrs HW=162.54' (Free Discharge) 't�=Exfiltration (Exfiltration Controls 0.01 cfs) Primary OutFlow Max=0.01 cfs @ 12.93 hrs HW=163.57' TW=0.00' (Dynamic Tailwater) 'L1=Culvert (Passes 0.01 cfs of 0.02 cfs potential flow) 2=Orifice/Grate (Orifice Controls 0.01 cfs @ 0.91 fps) 3=Orifice/Grate (Controls 0.00 cfs) =Orifice/Grate (Controls 0.00 cfs) Summary for Pond 4P: Retain It Inflow Area = 43,305 sf, 92.68% Impervious, Inflow Depth = 0.37" for 1" Storm event Inflow - 0.43 cfs @ 12.09 hrs, Volume= 1,319 cf Outflow - 0.04 cfs @ 12.98 hrs, Volume= 1,196 cf, Atten= 90%, Lag= 53.3 min Primary - ' 0.04 cfs @ 12.98 hrs, Volume= 1,196 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Peak Elev= 164.06' @ 12.98 hrs Surf.Area= 5,300 sf Storage= 683 cf Plug-Flow detention time= 313.5 min calculated for 1,196 cf(91% of inflow)" Center-of-Mass det. time= 267.8 min ( 1,091.8- 824.0) Volume Invert Avail.Stora a Storage Description #1A 163.90' 329 cf 106.00'W x 50.00%x 2.67'H Field A 14,133 cf Overall - 13,312 cf Embedded = 821 cf x 40.0% Voids #2A 163.90' 8,530 cf retain_it 2.0' x 78 Inside#1 Inside= 84.0"W x 24.0"H => 13.78 sf x 8.00'L = 110.3 cf Outside= 96.0"W x 32.0"H => 21.33 sf x 8.00'L= 170.7 cf 13 Rows adjusted for 71.8 cf perimeter wall 8,859 cf Total Available Storage 505 Sutton Proposed Conditions Hydrologic Analysis Type 11124-hr I"Storm Rainfall=1.00" Prepared by Microsoft Printed 8/13/2019 Hy droCAD010,00-13 sh 00401 ©2014 H droCAD Software Solutions LLC Page 11 Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 159.00' 12.0" Round Culvert L= 340 Ke= 0.500 Inlet/Outlet Invert= 159.00' 1 158.32' S= 0.0200 T Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 163.90' 3.0"Vert. OrificelGrate C= 0.600 #3 Device 1 164.30' 8.0" W x 2.0" H Vert. Orifice/Grate C= 0.600 #4 Device 1 165.60' 4.0' long x 0.6' Breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 Coef. (English) 2.80 2.92 3,08 3.30 3.32 Primary OutFlow Max=0.04 cfs @ 12.98 hrs HW=164.06' TW=0.00' (Dynamic Taiiwater) t--I Culvert (Passes 0.04 cfs of 8.07 cfs potential flow) 2=OrificelGrate (Orifice Controls 0.04 cfs @ 1.34 fps) 3=Orifice/Grate ( Controls 0.00 cfs) Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Summary for Pond 5P: Retain It Inflow Area = 15,214 sf,100.00% Impervious, Inflow Depth = 0.79" for 1" Storm event Inflow - 0.31 cfs. @ 12.08 hrs, Volume= 1,003 of Outflow - U5 cfs @ 11.86 hrs, Volume 1,003 of, Atten= 84%, Lag= 0.0 min Discarded = 0.06 cfs @ 11.86 hrs, Volume= 1,003 of Primary - 0.00 cfs @ 0.00 hrs, Volume= 0 of Routing by Dyn-Star-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs/3 Peak Elev= 165.84' @ 12.56 hrs Surf.Area= 2,116 sf Storage= 287 of Plug-Flow detention time= 35.3 min calculated for 1,003 of (100% of inflow) Center-of-Mass det. time= 35.3 min ( 823.2- 787.9) Volume Invert Avail.Stora a Storage Description #1 166.50, 635 of Custom Stage Data (Prismatic)Listed below(Recalc) 6,708 of Overall - 5,120 of Embedded = 1,588 of x 40.0% Voids #2 166.00' 3,308 of retain-it 2.0' x 30 Inside#1 Inside= 84.0"W x 24.0"H => 13.78 sf x 8.001 = 110.3 of Outside= 96.0"W x 32.0"H => 21.33 sf x 8.001 = 170.7 of 3,943 of Total Available Storage Elevation Surf.Area Inc.Store Cum.Store feet s -ft cubic-feet cubic-feet 166.50 2,116 0 0 168.67 2,116 6,708 6,708 506 Sutton Proposed Conditions Hydrologic Analysis Type 11124-hr I'Storm Rainfall=9.00° Prepared by Microsoft Printed 8/13/2019 H droCAD®10.00-13 sln 00401 ©2014 H droCAD Software Solutions LLC Pa e 12 Device Routing Invert Outlet Devices #1 Primary 165.40' 12.0" Round Culvert L= 30.0' Ke= 0.500 Inlet/Outlet Invert= 165.40' / 164.951 S= 0.0150 '1' Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 167.00' 12.0"W x 3.0" H Vert. Orifice/Grate C= 0.600 #3 Device 1 167.80' 9.0"Vert. Orifice/Grate C= 0.600 #4 Device 1 168.00' 4.0' long x 0.5' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 Coef. (English) 2.80 2.92 3,08 3.30 3.32 #5 Discarded 165.50' 1.020 in/hr Exfiltration over Surface area Phase-In= 0.01' Discarded OutFlow Max=0.05 cfs @ 11.86 lirs HW=165.53' (Free Discharge) t-6=Exfiltration (Exfiltration Controls 0.05 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=165.50' TW=163.90' (Dynamic Tailwater) t_E=Cuivert (Passes 0.00 cfs of 0.04 cfs potential flow) =Orifice/Grate ( Controls 0.00 cfs) =Orifice/Grate ( Controls 0.00 cfs) Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Summary for Pond 6P: Infiltration Trench [87] Warning: Oscillations may require smaller dt or Finer Routing (severity=42) Inflow Area = 2,552 sf,100.00% Impervious, Inflow Depth = 0.79" for 1" Storm event Inflow = 0.05 cfs @ 12.08 hrs, Volume= 168 cf Outflow = 0.01 cfs @ 12.55 hrs, Volume= 168 cf, Atten= 83%, Lag= 27.9 min Discarded = 0.01 cfs @ 12.54 hrs, Volume= 167 cf Primary - 0.00 cfs @ 12.56 hrs, Volume= 1 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs/3 Peak Elev= 170.50' @ 12.55 hrs Surf.Area= 232 sf Storage= 70 cf Plug-Flow detention time= 214.0 min calculated for 168 cf(100% of inflow) Center-of-Mass det. time 214.0 min ( 1,001.9- 787.9) Volume Invert Avail.Stora a Storage Description #1 169.00' 70 cf Stone Trench (Prismatic)Listed below(Recalc) 174 cf Overall x 40.0% Voids #2 170.50' 12 of Area Over Trench Prismatic Listed below Recalc 81 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) s -ft cubic-feet cubic-feet 169.00 116 0 0 170.50 116 174 174 Elevation Surf.Area lnc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 170.50 116 0 0 170.60 116 12 12 1 i 505 Sutton Proposed Conditions Hydrologic Analysis Type ill 24-hr I"Storm Rainfall=1.00" Prepared by Microsoft Printed 8/13/2019 H droCADO 10.00-13 sfn 00401 ©2014 H droCAD Software Solutions LLC Pacie 13 Device Routing Invert Outlet Devices #1 Primary 170.50' 70.0' long x 1.0' 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 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32 #2 Discarded 1%00' 1.020 inthr Exfiltration over Surface area Phase-ln= 0.01' Discarded OutFlow Max=0.01 cfs @ 12.54 hrs. HW=170.50' (Free Discharge) L2=Exflltration (Exfiltration Controls 0.01 cfs) Primary OutFlow Max=0.00 cfs @ 12.55 hrs HW=170.50' TW=0.00' (Dynamic Tallwater) t--1=Broad-Crested Rectangular Weir (Weir Controls 0.00 cfs @ 0.07 fps) 505 Sutton Proposed Conditions Hydrologic Analysis Type/1/24-hr 2-Year Rainfall=3.20" Prepared by Microsoft Printed 8/13/2019 HydroCAD®10.00-13 s/n 00401 ©2014 HydroCA_D_Software Solutions LLC Page 14 Summary for Subcatchment PSI: Runoff - 1.89 cfs @ 12.08 hrs, Volume= 6,192 cf, Depth= 2.64" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.20" Areas CN Description 3,170 74 >75% Grass cover, Good, HSG C 23,273 98 Paved parking, HSG C 661 98 Roofs, HSG C 987 98 Unconnected pavement, HSG C 28,091 95 Weighted Average 3,170 11.28% Pervious Area 24,921 88.72% Impervious Area 987 3.96% Unconnected Tc Length Slope Velocity Capacity Description min (feet) (ftlft} (ftlsec) (cfs) _ 6.0 Direct Entry, Summary for Subcatchment PSIO: Runoff - 0.99 cfs @ 12.08 hrs, Volume= 3,423 cf, Depth= 2.97" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.20" Area (sf) CN Description 13,844 98 Roofs, HSG C 13,844 100.00% Impervious Area Tc Length Slope Velocity Capacity Description min feet ft/ft) (ft/sec) (cfs 6.0 Direct:Entry, Summary for Subcatchment PSI 1: Runoff - 1.08 cfs @ 12.08 hrs, Volume= 3,762 cf, Depth= 2.97" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.20" Area (sf) CN Description 15,214 98 Roofs, HSG C 15,214 100.00% Impervious Area 505 Sutton Proposed Conditions Hydrologic Analysis Type It/ 24-hr 2-Year Rainfall=3.20" Prepared by Microsoft Printed 8/13/2019 NydroCA©® 10.OQ-13 sln 00401 ©2014 HydroCAD Software Solutions LLC _ Page 15 Tc Length Slope Velocity Capacity Description j min feet ft/ft) (ft/sec) (cfs 6.0 Direct Entry, Summary for Subcatchment PSI2: Runoff -- 0.34 cfs @ 12.10 hrs, Volume= 1,109 cf, Depth= 1.04" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.20" Areas CN Description 12,822 74 >75% Grass cover, Good, HSG C 12,822 100.00% Pervious Area Tc Length Slope Velocity Capacity Description min feet ft/ft) (fYsec) (cfs 6.0 Direct Entry, Summary for Subcatchment PS2: Runoff - 0.90 cfs @ 12.08 hrs, Volume= 2,918 cf, Depth= 2.64" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.20" Areas CN Description 2,572 74 >75% Grass cover, Good, HSG C 6,226 98 Paved parking, HSG C 1,474 98 Roofs, HSG C 3,495 98 Unconnected pavement, HSG C 13,767 94 Weighted Average 2,572 18.68% Pervious Area 11,195 81.32% Impervious Area 3,495 31.22% Unconnected Tc Length Slope Velocity Capacity Description min feet ft/ft ftlsec cfs 6.0 Direct Entry, Summary for Subcatchment PS3: Runoff - 0.52 cfs @ 12.09 hrs, Volume= 1,626 cf, Depth= 2.26" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.20" 505 Sutton Proposed Conditions Hydrologic Analysis Type ///24-hr 2-Year Rainfall=3.20" Prepared by Microsoft Printed 8/13/2019 H droCAD® 10.00-13 s/n 00401 ©2014 H droCAD Software Solutions LLC Pacie 16 Areas CN Description 2,355 74 >75% Grass cover, Good, HSG C 5,874 98 Paved parking, HSG C 34 98 Roofs, HSG C 378 98 Unconnected pavement, HSG C 8,641 91 Weighted Average 2,355 27.25% Pervious Area 6,286 72.75% Impervious Area 378 6.01% Unconnected Tc Length Slope Velocity Capacity Description min feet ftlft ft/sec cfs 6.0 Direct Entry, Summary for Subcatchment P84: Runoff - 0.45 cfs @ 12.09 hrs, Volume 1,393 cf, Depth= 1.40" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.20" Areas CN Description 8,762 74 >76% Grass cover, Good, HSG C 3,160 98 Paved parking, HSG C 11,922 80 Weighted Average 8,762 73.49% Pervious Area 3,160 26.51% Impervious Area Tc Length Slope Velocity Capacity Description min (feet)__ ft/ft ft/sec cfs 6.0 Direct Entry, Summary for Subcatchment PSS: Runoff - 0.62 cfs @ 12.09 hrs, Volume= 1,918 cf, Depth= 2.00" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.20" Area (so CN Description 4,846 74 >75% Grass cover, Good, HSG C 5,452 98 Paved parking, HSG C 95 98 Roofs, HSG C 1,133 98 Unconnected pavement, HSG C 11,526 88 Weighted Average 4,846 42.04% Pervious Area 6,680 57.96% Impervious Area 1,133 16.96% Unconnected i 505 Sutton Proposed Conditions Hydrologic Analysis Type 11124-hr 2-Year Rainfall=3.20" Prepared by Microsoft Printed 8/13/2019 N droCAD® 10.00-13 s/n 00401 ©2014 H droCAD Software Solutions LI-C Page 17 To Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs U Direct Entry, Summary for Subcatchment PS6: Runoff = 0.14 cfs @ 12.10 hrs, Volume= 462 of, Depth= 1.04" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.20" i Area (so CN Description 5,343 74 >75% Grass cover, Good, HSG C 5,343 100.00% Pervious Area To Length Slope Velocity Capacity Description rein feet ft/ft ft/sec cfs 6.0 Direct Entry, Summary for Subcatchment PS7: Runoff - 0,07 cfs @ 12.10 hrs, Volume= 231 of, Depth= 1.04" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.20" Areas CN Description 2,666 74 >75% Grass cover, Good, HSG C 2,666 100.00% Pervious Area To Length Slope Velocity Capacity Description min feet ftlft) (ft/sec) (cfs 6.0 Direct Entry, Summary for Subcatchment PS8: Runoff = 0.55 cfs @ 12.10 hrs, Volume= 1,807 of, Depth= 1.04" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.20" Area (so CN Description 20,900 74 >75% Grass cover, Good, HSG C 20,900 100.00% Pervious Area 505 Sutton Proposed Conditions Hydrologic Analysis Type /1/24-hr 2-Year Rainfall=3.20" Prepared by Microsoft Printed 8/13/2019 H droCADO 10.00-13 s/n 00401 ©2014 H droCAD Software Solutions LLC Page 18 Tc Length Slope Velocity Capacity Description m(n)_ (feet) (fVft) (ftlsec) (cfs) 4.9 50 0.0300 0.17 Sheet Flow, Grass: Short n= 0.150 P2= 3.10" 1.3 210 0.0290 2.74 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 0.0 20 0.3500 9.52 Shallow Concentrated Flow, _ Unpaved Kv= 16.1 fps 6.2 280 Total Summary for Subcatchment PS8A: Runoff = 0.18 cfs @ 12.08 hrs, Volume= 631 cf, Depth= 2.97" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.20" Area (sf) CN Description 587 98 Roofs, HSG C 1,965 98 Unconnected pavement, HSG C 2,552 98 Weighted Average 2,552 100.00% Impervious Area 1,965 77.00% Unconnected Tc Length Slope Velocity Capacity Description min (feet) (ftlft) (ftlsec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS9: Runoff = 1.28 cfs @ 12.08 hrs, Volume= 4,442 cf, Depth= 2.97" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfa[I=3.20" Area (so CN Description 17,961 98 Roofs, HSG C 17,961 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) feet)- (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Reach DPI: [401 Hint: Not Described (Outflow=Inflow) Inflow Area = 126,309 sf, 78.59% Impervious, Inflow Depth > 1.60" for 2-Year event Inflow -- 2.86 cfs @ 12.14 hrs, Volume= 16,876 cf Outflow -- 2.86 cfs @ 12.14 hrs, Volume= 16,876 cf, Atten= 0%, Lag= 0.0 min i 505 Sutton Proposed Conditions Hydrologic Analysis Type III 24-hr 2-Year Rainfall=3.20" Prepared by Microsoft Printed 8/13/2019 ydroCAD® 10.0 -13 sln_,. 00401 ©2014 HydroCAD Software Solutions LLC Page 19 Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Summary for Reach DP2: [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 23,452 sf, 10.88% Impervious, Inflow Depth = 1.09" for 2-Year event Inflow - 0.72 cfs @ 12.09 hrs, Volume= 2,127 of Outflow - 0.72 cfs @ 12.09 hrs, Volume= 2,127 of, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Summary for Reach DP3: [40] Hint: Not Described (Outflow=Inflow) Summary for Reach DP4: [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 12,822 sf, 0.00% Impervious, Inflow Depth = 1.04" for 2-Year event Inflow = 0.34 cfs @ 12.10 hrs, Volurne= 1,109 cf Outflow - 0.34 cfs @ 12.10 hrs, Volume= 1,109 of, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.0D hrs, dt= 0.01 hrs 13 Summary for Reach DP5: [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 2,666 sf, 0.00% Impervious, Inflow Depth = 1.04" for 2-Year event Inflow - 0.07 cfs @ 12.10 hrs, Volume= 231 of Outflow - 0.07 cfs @ 12.10 hrs, Volume= 231 of, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Summary for Pond 1 P: Retain It Inflow Area = 31,945 sf, 75.90% Impervious, Inflow Depth = 2.45" for 2-Year event Inflow - 1.94 cfs @ 12.09 hrs, Volume= 6,530 of Outflow - 0.91 cfs @ 12.25 hrs, Volume= 6,530 of, Atten= 53%, Lag= 9.9 min Discarded 0.03 cfs @ 8.97 hrs, Volume= 2,439 of Primary - 0.88 cfs @ 12.25 hrs, Volume= 4,090 of Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 i 505 Sutton Proposed Conditions Hydrologic Analysis Type III 24-hr 2-Year Rainfall=3.20" Prepared by Microsoft Printed 8/13/2019 HydroCAD010,00-13 s/n 00401 ©2014 HydroCAD Software Solutions LLC Page 20 Peak Elev= 163,61' @ 12,25 hrs Surf.Area= 1,460 sf Storage= 1,502 cf Plug-Flow detention time= 54.4 min calculated for 6,528 of(100% of inflow) Center-of-Mass det. time= 54.4 min ( 829.7-.775.4) Volume Invert Avail.Storage Storage Description #1A 162.00' 867 of 146.00'W x 10.00'L x 5.17'H Field A 7,543 of Overall - 5,376 of Embedded = 2,167 of x 40,0%Voids #2A 162.60' 3,870 of retain it 4.0' x 18 Inside#1 Inside= 84,0"W x 48.0"H => 28.87 sf x 8.001 = 230.9 of Outside= 96.0"W x 56.0"H => 37.33 sf x 8.001 = 298.7 of -- 18 Rows adjusted for 286.9 of perimeter wall 4,737 of Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 162.50' 12.0" Round Culvert L= 112.0' Ke= 0.500 Inlet/Outlet Invert= 162.50'/ 153,84' S= 0.0773 T Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 162.50' 6.0"Vert, Orifice/Grate C= 0.600 #3 Device 1 164.50' 3.0"Vert. Orifice/Grate C= 0.600 #4 Device 1 166,40' 12.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #5 Discarded 162,00' 1.020 in/hr Exfiltration over Surface area Phase-ln= 0.01' Discarded OutFlow Max=0.03 cfs @ 8.97 hrs HW=162.05' (Free Discharge) t5=Exf1ltration (Exfiltration Controls 0,03 cfs) Primary OutFlow Max=0.88 cfs @ 12.25 hrs HW=163.61' TW=0.00' (Dynamic Tailwater) t1=Culvert (Passes 0.88 cfs of 2.95 cfs potential flow) Z=Orifice/Grate (Orifice Controls 0.88 cfs @ 4.46 fps) 3=Orifice/Grate (Controls 0.00 cfs) =Orifice/Grate ( Controls 0.00 cfs) Summary for Pond 2P: Retain It Inflow Area = 13,767 sf, 81,32% Impervious, Inflow Depth = 2.54" for 2-Year event Inflow - 0.90 cfs @ 12.08 hrs, Volume 2,918 cf Outflow - 0.33 cfs @ 12.33 hrs, Volume= 2,918 of, Atten= 63%, Lag= 15.0 min Discarded = 0.02 cfs @ 9.85 hrs, Volume= 1,561 of Primary - 0.31 cfs @ 12.33 hrs, Volume= 1,368 of Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs/3 Peak Elev= 163.62' @ 12.33 hrs Surf.Area= 900 sf Storage= 977 of Plug-Flow detention time= 136.7 min calculated for 2,918 of(100% of inflow) Center-of-Mass det. time= 136.7 min (923.8 -787.1 ) E 505 Sutton Proposed Conditions Hydrologic Analysis Type 11124-hr 2-Year Rainfall=3.20 Prepared by Microsoft Printed 8/13/2019 H droCAD® 10.00-13 s/n 00401 OO 2014 H droCAD Software Solutions LI.0 Pa e 21 Volume Invert Avail.Stora a Storage Description #1A 162.00' 400 of 50.00'W x 18.00'L x 4.67'H Field A 4,200 cf Overall - 3,200 cf Embedded = 1,000 cf x 40.0% Voids #2A 162.50' 2,311 cf retain_it 3.5' x 12 Inside#1 Inside= 84.0"W x 42.0"H => 25.10 sf x 8.00% = 200.8 cf Outside= 96.0"W x 50.0"H => 33.33 sf x 8.001 = 266.7 of 6 Rows adjusted for 98.2 cf perimeter wall 2,711 of Total Available Storage Storage Group A created with Chamber Wizard Device Routing_ __ Invert Outlet Devices #1 Primary 162.60' 12.0" Round Culvert L= 23.0' Ke= 0.500 Inlet/ Outlet Invert= 162.50' / 158.32' S= 0.1817 '/' Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 162.90' 4.0"Vert. Orifice/Grate C= 0.600 #3 Device 1 163,80' 3.0"Vert. Orifice/Grate C= 0.600 #4 Device 1 164.80' 4.0"Vert, Orifice/Grate C= 0.600 #5 Device 1 165.40' 12.0" Horiz. Oriflce/Grate C= 0.600 Limited to weir flow at low heads #6 Discarded 162.00' 1.020 inlhr Exfiltration over Surface area Phase-In= 0.01' Discarded OutFlow Max=0.02 cfs @ 9.85 hrs HW=162.05' (Free Discharge) t--S=Exfiltration (Exfiitration Controls 0.02 cfs) Primary OutFlow Max=0.31 cfs @ 12.33 hrs HW=163.62' TW=0.00' (Dynamic Tailwater) t_4t- =Culvert (Passes 0.31 cfs of 2.97 cfs potential flow) 2=OrificefGrate (Orifice Controls 0.31 cfs @ 3.57 fps) 3=Orifice/Grate ( Controls 0.00 cfs) =Orifice/Grate ( Controls 0,00 cfs) =Orifice/Grate ( Controls 0.00 cfs) Summary for Pond 3P: Retain It Inflow Area = 13,844 sf,100.00% Impervious, Inflow Depth = 2.97" for 2-Year event Inflow _ 0.99 cfs. @ 12.08 hrs, Volume= 3,423 cf Outflow = 0.65 cfs @ 12.17 hrs, Volume= 3,423 cf, Atten= 34%, Lag= 5.3 min Discarded = 0.01 cfs @ 7.41 hrs, Volume= 1,363 cf Primary - 0.63 cfs @ 12.17 hrs, Volume= 2,071 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Peak Elev= 164.60' @ 12.17 hrs Surf.Area= 612 sf Storage= 879 cf Plug-Flow detention time= 117.4 min calculated for 3,423 cf(100% of inflow) Center-of-Mass det. time= 117.4 min (873.8 - 756.4) 505 Sutton Proposed Conditions Hydrologic Analysis Type 11124-hr 2-Year Rainfall=3.20" Prepared by Microsoft Printed 8/13/2019 HydroCADO 10.00-13 sln 00401 4 2014 HydroCAD Software Solutions LLC Page 22 Volume Invert Avaii.Storage Storage Description #1A 162.50' 249 cf 34.00'W x 18.001 x 3,67'H Field A 2,244 cf Overall - 1,621 cf Embedded = 623 cf x 40.0% Voids #2A 163.00' 1,084 cf retain it 2.5' x 8 Inside#1 Inside=84.0"W x 30.0"H => 17.56 sf x 8.001= 140.4 cf Outside= 96.0"W x 38.0"H => 25.33 sf x 8.00'L = 202.7 of 4 Rows adjusted for 39.6 cf perimeter wall 1,333 of Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 163.50' 12.0" Round Culvert L= 23.0' Ke= 0.500 Inlet/Outlet Invert= 163.50' 1158.32' S= 0.2252 T Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 163,50' 4.0"Vert, Orifice/Grate C= 0.600 #3 Device 1 164.30' 6.0"Vert. Orifice/Grate C= 0.600 #4 Device 1 165.20' 12.4" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #5 Discarded 162.50' 1.020 inthr Exfiltration over Surface area Phase-in= 0.01' Discarded OutFlow Max=0.01 cfs @ 7.41 hrs HW=162.54' (Free Discharge) t5=ExfIItrat1Ion (Exfiltration Controls 0.01 cfs) Primary OutFlow Max=0.63 cfs @ 12.17 hrs HW=164.60' TW=0.00' (Dynamic Tallwater) L1=Culvert (Passes 0.63 cfs of 2.92 cfs potential flow) 2=OrificeiGrate (Orifice Controls 0.41 cfs @ 4.65 fps) 3=Orifice/Grate (Orifice Controls 0.23 cfs @ 1.86 fps) =Orifice/Grate ( Controls 0.00 cfs) Summary for Pond 4P: Retain It Inflow Area = 43,305 sf, 92.68% Impervious, Inflow Depth = 1.72" for 2-Year event Inflow = 1.89 cfs @ 12.08 hrs, Volume= 6,192 cf Outflow - 0.40 cfs @ 12.50 hrs, Volume= 6,037 cf, Atten= 79%, Lag= 25.0 min Primary - 0.40 cfs @ 12.50 hrs, Volume= 6,037 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Peak Elev= 164.56' @ 12.50 hrs Surf.Area= 5,300 sf Storage= 2,908 cf Plug-Flow detention time= 200.3 min calculated for 6,035 cf(97% of inflow) Center-of-Mass det. time= 185.2 min ( 966.1 - 781.0) Volume Invert Avail.Storage Storage Description #1A 163.90' 329 cf 106.00'W x 50.00'L x 2.67'H Field A 14,133 of Overall - 13,312 cf Embedded = 821 cf x 40.0% Voids #2A 163.90' 8,530 cf retain_it 2.0' x 78 Inside#1 Inside= 84.0"W x 24.0"H => 13.78 sf x 8.001 = 110.3 cf Outside= 96.0"W x 32.0"H => 21.33 sf x 8.00'L = 170.7 of 13 Rows adjusted for 71.8 cf perimeter wall 8,859 cf Total Available Storage i i 505 Sutton Proposed Conditions Hydrologic Analysis Type ill 24-hr 2-Year Rainfall=3.20" Prepared by Microsoft Printed 8/13/2019 droCAD610.00-13 sln 00401 02014 HydraCAp Software Solutions LLC Page 23 Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 159.00' 12.0" Round Culvert L= 34.0' Ke= 0.500 Inlet/ Outlet Invert= 159.00'1158,32' S= 0.0200 'i' Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 163.90' 3.0"Vert, Orifice/Grate C= 0.600 #3 Device 1 164.30' 8.0"W x 2.0" H Vert. Orifice/Grate C= 0.600 #4 Device 1 165.60' 4.0' long x 0.5' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0,60 0.80 1.00 Coef. (English) 2.80 2.92 3.08 3.30 3.32 Primary OutFlow Max=0.40 cfs @ 12.50 hrs HW=164.56' TW=0.00' (Dynamic Tailwater) L1=Culvert (Passes 0.40 cfs of 8.61 cfs potential flow) 2=OrificelGrate (Orifice Controls 0.17 cfs @ 3.53 fps) 3=Orifice/Grate (Orifice Controls 0.22 cfs @ 2.02 fps) =Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Summary for Pond SP: Retain It Inflow Area = 15,214 sf,100.00% Impervious, Inflow Depth = 2.97" for 2-Year event Inflow - 1.08 cfs @ 12.08 hrs, Volume= 3,762 cf Outflow = 0.05 cfs @ 10.66 hrs, Volume= 3,762 cf, Atten= 95%, Lag= 0.0 min Discarded = 0.05 cfs @ 10.66 hrs, Volume= 3,762 cf Primary - 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Peak Elev= 166.78' @ 14.48 hrs Surf.Area= 2,116 sf Storage= 1,766 cf Plug-Flow detention time= 296.2 min calculated for 3,762 cf (100% of Inflow) Center-of-Mass det. time= 296.2 min ( 1,052.6- 756.4 ) Volume Invert Avail.Stora a Storage Description #1 165.50' 635 cf Custom Stage Data (Prismatic)Listed below (Recalc) 6,708 cf Overall - 5,120 cf Embedded = 1,588 cf x 40.0% Voids #2 166.00' 3,308 cf retain It 2.0' x 30 Inside#1 Inside= 84.0"W x 24.0"H => 13.78 sf x 8.001= 110.3 cf Outside= 96.0"W x 32.0"H => 21.33 sf x 8,001 = 170.7 cf 3,943 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store feet) (sq-ft) (cubic-feet) (cubic-feet 165.50 2,116 0 - 0 168.67 2,116 6,708 6,708 505 Sutton Proposed Conditions Hydrologic Analysis Type Ili 24-hr 2-Year Rainfall=3.20" Prepared by Microsoft Printed 8113/2019 _ljLdroCAD® 10.00-13 s/n 00401 ©2014 HydroCAD Software Solutions LLC Page 24 Device Routing Invert Outlet Devices #1 Primary 165.40' 12.0" Round Culvert L= 30.0' Ke= 0.500 Inlet/Outlet Invert= 165.40'/ 164.95' S= 0.0150 T Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 167.00' 12.0"W x 3.0" H Vert. Orifice/Grate C= 0.600 #3 Device 1 167.80' 9.0"Vert. Orifice/Grate C= 0.600 #4 Device 1 168.00' 4.0' long x 0.5' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 Coef. (English) 2.80 2.92 3.08 3.30 3.32 #5 Discarded 165.50' 1.020 in/hr Exfiltration over Surface area Phase-In= 0.01' Discarded OutFlow Max=0.05 cfs @ 10.66 hrs HW=165.53' (Free Discharge) t--6 Exfiltration (Exfiltration Controls 0.05 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=165.50' TW=163.90' (Dynamic Tailwater) t--1=Culvert (Passes 0.00 cfs of 0.04 cfs potential flow) 2=Orifice/Grate ( Controls 0.00 cfs) 3=Orifice/Grate ( Controls 0.00 cfs) =Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Summary for Pond 6P: Infiltration Trench Inflow Area = 2,552 sf,100.00% Impervious, Inflow Depth = 2.97" for 2-Year event Inflow - 0.18 cfs @ 12.08 hrs, Volume= 631 cf Outflow = 0.18 cfs @ 12.08 hrs, Volume= 631 cf, Atten= 0%, Lag= 0.1 min Discarded = 0.01 cfs @ 11.32 hrs, Volume= 311 cf Primary - 0.18 cfs @ 12.08 hrs, Volume= 320 cf Routing by Dyn-Stor-Ind method, Time Spam 0.00-36.00 hrs, dt= 0.01 hrs/3 Peak Elev= 170.51' @ 12.08 hrs Surf.Area= 232 sf Storage- 71 cf Plug-Flow detention time= 108.0 min calculated for 631 cf(100% of inflow) Center-of-Mass det. time= 108.1 min (864.5 - 756.4 ) Volume Invert Avail.Stora a Storage Description #1 169.00' 70 cf Stone Trench (Prismatic)Listed below (Recalc) 174 of Overall x 40.0% Voids #2 170.50' 12 cf Area Over Trench Prismatic Listed below Recalc 81 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store feet s -ft cubic-feet cubic-feet 169.00 116 0 0 170.50 116 174 174 Elevation Surf.Area Inc.Store Cum.Store feet s_ ( g-ft) (cubic-feet) (cubic-feet) 170.60 116 0 0 170.60 116 12 12 i e 505 Sutton Proposed Conditions Hydrologic Analysis Type 11124-hr 2-Year Rainfall=3.20 Prepared by Microsoft Printed 8/13/2019 HydroCADO 10.00-13 sln 00401 ®2014 HydroCAD Software Solutions LLC Page 25 Device Routing Invert Outlet Devices #1 Primary 170.50' 70.0' long x 1.0' 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 i Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 i 3.30 3.31 3.32 #2 Discarded 169.00' 1.020 in/hr Exfiltration over Surface area Phase-In= 0.01' Discarded OutFlow Max=0.01 cfs @ 11.32 hrs HW=170.50' (Free Discharge) t2=Exfiltration (Exfiltration Controls 0.01 cfs) Primary ary OutFlow Max=0.18 cfs @ 12.08 hrs HW=170.51' 7W=0.00' (Dynamic Tailwater) 1=Broad-Crested Rectangular Weir (Weir Controls 0.18 cfs @ 0.26 fps) e 505 Sutton Proposed Conditions Hydrologic Analysis Type 1//24-hr 10-YearRainfa11=4,80" Prepared by Microsoft Printed 8/13/2019 H droCADO 10,00-13 s/n 00401 0 2014 H droCAD Software Solutions LLC Page 26 Summary for Subcatchment PSI: Runoff = 2.94 cfs @ 12.08 hrs, Volume= 9,882 cf, Depth= 4.22" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=4.80" Area (sf) CN Description 3,170 74 >75% Grass cover, Good, HSG C 23,273 98 Paved parking, HSG C 661 98 Roofs, HSG C 987 98 Unconnected pavement, HSG C 28,091 95 Weighted Average 3,170 11.28% Pervious Area 24,921 88.72% Impervious Area 987 3.96% Unconnected Te Length Slope Velocity Capacity Description Amin)_ (feet) (ft/ft)_ (ft/sec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS10: Runoff = 1.49 cfs @ 12.08 hrs, Volume= 5,265 cf, Depth= 4.56" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=4.80" Area (sf) CN Description 13,844 98 Roofs, HSG C 13,844 100.00% Impervious Area Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 6.0 Direct Entry, Summary for Subcatchment PSI 1: Runoff - 1.64 cfs @ 12.08 hrs, Volume= 5,786.cf, Depth= 4.56" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=4,80" Areas CN Description 15,214 98 Roofs, HSG C 15,214 100.00% Impervious Area i 505 Sutton Proposed Conditions Hydrologic Analysis Type /it 24-hr 10-Year Rainfa11=4.80" Prepared by Microsoft Printed 8/13/2019 H droCAD0 10.00-13 sin 00401 02014 H droCAD Software Solutions LLC Page 27 Tc Length Slope Velocity Capacity Description _ min (feet) (fUft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PSI2: Runoff = 0.76 cfs @ 12.09 hrs, Volume= 2,357 of, Depth= 2.21" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=4.80" Area (sf) CN Description 12,822 74 >75% Grass cover, Good, HSG C 12,822 100.00% Pervious Area Tc Length Slope Velocity Capacity Description —_-(min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS2: Runoff - 1.42 cfs @ 12.08 hrs, Volume= 4,716 cf, Depth= 4.11" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=4.80" Area (sff) CN Description 2,672 74 >75% Grass cover, Good, HSG C 6,226 98 Paved parking, HSG C 1,474 98 Roofs, HSG C 3,495 98 Unconnected pavement, HSG C 13,767 94 Weighted Average 2,572 18.68% Pervious Area 11,195 81.32% Impervious Area 3,495 31.22% Unconnected Te Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS3: Runoff = 0.85 cfs @ 12.08 hrs, Volume 2,728 cf, Depth= 3.79" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=4.80" 505 Sutton Proposed Conditions Hydrologic Analysis Type Ilf 24-hr 90-Year Rainfaf1=4.80" Prepared by Microsoft Printed 8/13/2019 H droCAD® 10.00-13 sln 00401 ©2014 H droCAD Software Solutions LLC Page 28 Area (sf) CN Description 2,356 74 >75% Grass cover, Good, HSG C 5,874 98 Paved parking, HSG C 34 98 Roofs, HSG C 378 98 Unconnected pavement, HSG C 8,641 91 Weighted Average 2,355 27.25% Pervious Area 6,286 72.75% Impervious Area 378 6.01% Unconnected Tc Length Slope Velocity Capacity Description (min) feet ft/ft ft/sec cfs 6.0 Direct Entry, Summary for Subcatchment P84: Runoff 0.87 cfs @ 12.09 hrs, Volume= 2,701 cf, Depth= 2.72" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=4.80" Area (so CN Description 8,762 74 >75% Grass cover, Good, HSG C 3,160 98 Paved parking, HSG C 11,922 80 Weighted Average 8,762 73.49% Pervious Area 3,160 26.51% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS5: Runoff - 1.06 cfs @ 12.09 hrs, Volume= 3,342 cf, Depth= 3.48" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=4.80" Area (sf) CN Description 4,846 74 >75% Grass cover, Good, HSG C 5,452 98 Paved parking, HSG C 95 98 Roofs, HSG C 1,133 98 Unconnected pavement, HSG C 11,526 88 Weighted Average 4,846 42.04% Pervious Area 6,680 57.96% Impervious Area 1,133 , 16,96% Unconnected i I 505 Sutton Proposed Conditions Hydrologic Analysis Type Il! 24-hr 10-Year Rainfall=4.80" Prepared by Microsoft Printed 8/13/2019 HydroCAD® 10.00-13 s/n 00401 ©_2014 HydroC_AD Software Solutions LLC Page 29 To Length Slope Velocity Capacity Description min feet fUft (ft/sec) cfs 6.0 Direct Entry, Summary for Subcatchment PS6: Runoff 0.32 cfs @ 12.09 hrs, Volume= 982 of, Depth= 2.21" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=4.80" Areas CN Description 5,343 74 >75% Grass cover, Good, HSG C 5,343 100.00% Pervious Area To Length Slope Velocity Capacity Description min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS7: Runoff - 0.16 cfs @ 12.09 hrs, Volume= 490 of, Depth= 2.21" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type Ill 24-hr 10-Year Rainfall=4.80" Areas CN Description 2,666 74 >75% Grass cover, Good, HSG C 2,666 100.00% Pervious Area To Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS8: Runoff = 1.22 cfs @ 12.09 hrs, Volume= 3,842 of, Depth= 2.21" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=4.80" Area (sf) CN Description 20,900 74 >75% Grass cover, Good, HSG C 20,900 100.00% Pervious Area I i 506 Sutton Proposed Conditions Hydrologic Analysis Type 1//24-hr 90-Year Rainfal1=4.80" Prepared by Microsoft Printed 8/13/2019 H droCAD® 10.00-13 s/n 00401 02014 H droCAD Software Solutions LLC Pacie 30 To Length Slope Velocity Capacity Description (min) _(feet) (ftlft) (ftlsec) (cfs) 4.9 50 0.0300 0.17 Sheet Flow, Grass: Short n= 0.150 P2= 3.10" 1.3 210 0.0290 2.74 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 0.0 20 0.3500 9.52 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 6.2 280 Total Summary for Subcatchment PS8A: Runoff - 0.27 cfs @ 12.08 hrs, Volume= 971 of, Depth= 4.56" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0,00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=4.80" Area (so CN Description 587 98 Roofs, HSG C 1,965 98 Unconnected pavement, HSG C 2,552 98 Weighted Average 2,552 100.00% Impervious Area 1,965 77.00% Unconnected To Length Slope Velocity Capacity Description (min) (feet) (ft" (ftisec) (cfs) 6.0 Direct Entry, Summary for Subcatchment P89: Runoff -- 1.94 cfs @ 12.08 hrs, Volume= 6,830 of, Depth= 4.56" Runoff by SCS TR-20 method, UH-SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=4.80" Area (sf) CN Description 17,961 98 Roofs, HSG C 17,961 100.00% Impervious Area To Length Slope Velocity Capacity Description min feet ftlft ftlsec cfs 6.0 Direct Entry; Summary for Reach DPI: 140] Hint: Not Described (Outflow=Inflow) Inflow Area = 126,309 sf, 78.59% Impervious, Inflow Depth > 2.96" for 10-Year event Inflow = 4.94 cfs @ 12.12 hrs, Volume= 31,196 of Outflow = 4.94 cfs @ 12.12 hrs, Volume= 31,196 of, Atten= 0%, Lag= 0.0 min 505 Sutton Proposed Conditions Hydrologic Analysis Type W 24-hr 10-Year Rainfall=4.80" Prepared by Microsoft Printed 8/13/2019 H droCADO 10.00-13 sln 00401 ©2014 H droCAD Software Solutions LLC Pacie 31 i Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Summary for Reach DP2: [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 23,452 sf, 10.88% Impervious, Inflow Depth = 2.27" for 10-Year event Inflow - 1.49 cfs @ 12.09 hrs, Volume= 4,437 cf Outflow = 1.49 cfs @ 12.09 hrs, Volume= 4,437 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Star-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs! 3 Summary for Reach DP3: [40] Hint: Not Described (Outflow=lnflow) Summary for Reach DP4: [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 12,822 sf, 0.00% Impervious, Inflow Depth = 2.21" for 10-Year event Inflow - 0.76 cfs. @ 12.09 hrs, Volume= 2,357 cf Outflow - 0.76 cfs @ 12.09 hrs, Volume= 2,357 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs!3 Summary for Reach DIPS: [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 2,666 sf, 0.00% Impervious, Inflow Depth = 2.21" for 10-Year event Inflow = 0.16 cfs @ 12.09 hrs, Volume= 490 cf Outflow 0.16 cfs @ 12.09 hrs, Volume= 490 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs / 3 Summary for Pond I P: Retain It Inflow Area = 31,945 sf, 75.90% Impervious, Inflow Depth = 3.96" for 10-Year event Inflow - 3.09 cfs @ 12.08 hrs, Volume= 10,540 cf Outflow - 1.26 cfs @ 12.30 hrs, Volume= 10,54.0 cf, Atten= 59%, Lag= 12.7 min Discarded = 0.03 cfs @ 7.39 hrs., Volume= 2,818 cf Primary 1.23 cfs @ 12.30 hrs, Volume= 7,723 of Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 505 Sutton Proposed Conditions Hydrologic Analysis Type 111 24-hr 90-Year Rainfall=4.80" Prepared by Microsoft Printed 8/13/2019 HydroCAD010.00-13 sln 00401 02014 HydroCAD Software Solutions LLC Page 32 Peak Elev= 164.44' @ 12.30 hrs Surf.Area= 1,460 sf Storage= 2,404 cf Plug-Flow detention time= 49.4 min calculated for 10,537 of(100% of inflow) Center-of-Mass det. time=49.4 min ( 816.8 -767.4) Volume Invert Avail.Storage Storage Description #1A 162.00' 867 cf 146.00'W x 10.001 x 5.17'H Field A 7,543 cf Overall - 5,376 cf Embedded = 2,167 cf x 40.0% Voids #2A 162.50' 3,870 of retain_it 4.0' x 18 Inside#1 Inside= 84.0"W x 48.0"H => 28.87 sf x 8.001 = 230.9 of Outside= 96.0"W x 56.0"H => 37.33 sf x 8.00'L = 298.7 cf 18 Rows ad'usted for 286.9 cf perimeter wall 4,737 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 162.50' 12.0" Round Culvert L= 112.0' Ke= 0.500 Inlet/Outlet Invert= 162.50'/ 153.84' S= 0.0773 `/' Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 162.50' 6.0"Vert. Orifice/Grate C= 0.600 #3 Device 1 164.50' 3.0"Vert. Orifice/Grate C= 0.600 #4 Device 1 166.40' 12.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #5 Discarded 162.00' 1.020 inlhr Exfiltratlon over Surface area Phase-In= 0.01' Discarded OutFlow Max=0.03 cfs @ 7.39 hrs HW=162.05' (Free Discharge) ''L5=ExfIItration (Exfiltration Controls 0.03 cfs) Primary OutFlow Max=1.23 cfs @ 12.30 hrs HW=164.44' TW=0.00' (Dynamic Tailwater) =Culvert (Passes 1.23 cfs of 4.53 cfs potential flow) 2=Orifice/Grate (Orifice Controls 1.23 cfs @ 6.25 fps) 3=Orifice/Grate (Controls 0.00 cfs) =Orifice/Grate (Controls 0.00 cfs) Summary for Pond 2P: Retain It Inflow Area 13,767 sf, 81.32% Impervious, Inflow Depth = 4.11" .far 10-Year event Inflow -- 1.42 cfs @ 12.08 hrs, Volume= 4,716 cf Outflow = 0.62 cfs @ 12.27 hrs, Volume= 4,716 cf, Atten= 56%, Lag= 11.0 min Discarded = 0.02 cfs @ 8.48 hrs, Volume= 1,814 cf Primary = 0.60 cfs @ 12.27 hrs, Volume= 2,902 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs/3 Peak Elev= 164.27' @ 12.27 hrs Surf,Area= 900 sf Storages 1,443 cf Plug-Flow detention time= 113.1 min calculated for 4,716 of(100% of inflow) Center-of-Mass det. time= 113.1 min ( 887.7- 774.6) } 1 505 Sutton Proposed Conditions Hydrologic Analysis Type 11124-hr 10-Year Rainfall=4.80" Prepared by Microsoft Printed 8/13/2019 H droCADO 10.00-13 sin 00401 O 2014 H droCAD Software Solutions LLC Page 33 Volume Invert _Avail.Storage Storage Description #1A 162.00' 400 cf 50.00'W x 18.00'L x 4.57'H Field A 4,200 cf Overall - 3,200 cf Embedded = 1,000 cf x 40.0% Voids #2A 162.50' 2,311 cf retain it 3.5' x 12 Inside#1 Inside 84.0"W x 42.0"H => 25.10 sf x 8.001= 200.8 cf Outside= 96.0"W x 50.0"H => 33.33 sf x 8.001 - 266.7 cf 6 Rows adjusted for 98.2 cf perimeter wall 2,711 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 162.50' 12.0" Round Culvert L= 23.0' Ke= 0.500 Inlet/Outlet Invert 162.50'/ 158,32' S= 0.1817 T Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 162.90' 4.0" Vert. Orifice/Grate C= 0.600 #3 Device 1 163.80' 3.0" Vert. Orifice/Grate C= 0.600 #4 Device 1 164.80' 4.0" Vert. Orifice/Grate C= 0.600 #5 Device 1 165.40' 12.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #6 Discarded 162.00' 1.020 in/hr Exfiltration over Surface area Phase-In= 0.01' Discarded OutFlow Max=0.02 cfs @ 8.48 hrs HW=162.05' (Free Discharge) t-6=Exfiltration (Exfiltration Controls 0.02 cfs) Primary OutFlow Max=0.60 cfs @ 12.27 hrs HW=164.27' TW=0.00' (Dynamic Tailwater) t - =Culvert (Passes 0.60 cfs of 4.26 cfs potential flow) 2=Orifice/Grate (Orifice Controls 0.46 cfs @ 5.28 fps) 3=Orifice/Grate (Orifice Controls 0.14 cfs @ 2.83 fps) =Orifice/Grate (Controls 0.00 cfs) =Orifice/Grate ( Controls 0.00 cfs) Summary for Pond 3P: Retain It Inflow Area = 13,844 sf,100.00% Impervious, Inflow Depth = 4.56" for 10-Year event Inflow - 1.49 cfs @ 12.08 hrs, Volume= 5,265 of Outflow = 1.10 cfs @ 12.15 hrs, Volume= 5,265 cf, Atten= 26%, Lag= 4.3 min Discarded = 0.01 cfs @ 5.27 hrs, Volume= 1,489 cf Primary - 1.09 cfs @ 12.15 hrs, Volume= 3,776 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Peals Elev= 164.96' @ 12.15 hrs Surf.Area= 612 sf Storage= 1,053 cf Plug-Flow detention time= 92.4 min calculated for 5,263 of(100% of inflow) Center-of-Mass det, time 92.5 min { 841.2 - 748.7 } 505 Sutton Proposed Conditions Hydrologic Analysis Type 11i 24-hr 10-Year Rainfall=4.80" Prepared by Microsoft Printed 8/13/2019 H_ydroCAD010.00-13 sln 00401 02014 HydroCAD Software Solutions LLC Page 34 Volume Invert Avall.Storacje Storage Description #1A 162.50' 249 cf 34.00'W x 18.001 x 3.67'H Field A 2,244 cf Overall - 1,621 of Embedded = 623 cf x 40.0% Voids #2A 163,00, 1,084 of retain_it 2.5' x 8 Inside#1 - Inside= 84.0"W x 30.0"H => 17.56 sf x 8.00'L= 140.4 cf Outside= 96.0"W x 38.0"H => 25,33 sf x 8.001 = 202.7 cf 4 Rows adjusted for 39.6 cf perimeter wall 1,333 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices - #1 • Primary 163.50' 12.0" Round Culvert L= 23.0' Ke= 0.500 Inlet 1 Outlet Invert= 163.50'1158.32' S= 0.2252 T Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 163.60' 4.0"Vert. Orifice/Grate C= 0.600 #3 Device 1 164.30' 6.0"Vert. Orifice/Grate C= 0.600 #4 Device 1 165.20' 12.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #5 Discarded 162.50' 1.020 inthr Exfiltration over Surface area Phase-In- 0.01' Discarded OutFlow Max=0.01 cfs @ 5.27 hrs HW=162.54' (Free Discharge) t-S=Exfiltration (Exfiltration Controls 0.01 cfs) Primary OutFlow Max=1.09 cfs @ 12.15 hrs HW=164.96' TW=0.00' (Dynamic Tailwater) 'L =Culvert (Passes '1.09 cfs of 3.71 cfs potential flow) 2=Orifice1Grate (Orifice Controls 0.48 cfs @ 5.48 fps) 3=Orifice/Grate (Orifice Controls 0.61 cfs @ 3.10 fps) =Orifice/Grate ( Controls 0.00 cfs) Summary for Pond 4P: Retain It Inflow Area = 43,305 sf, 92.68% Impervious, Inflow Depth = 3.03" for 10-Year event Inflow = 2.94 cfs @ 12.08 hrs, Volume= 10,919 cf Outflow - 0.63 cfs @ 12.61 hrs, Volume= 10,753 cf, Atten= 78%, Lag= 31.5 min Primary 0.63 cfs @ 12.61 hrs, Volume- 10,753 of Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Peak Elev= 164.96' @ 12.61 hrs Surf.Area= 5,300 sf Storage= 4,644 cf Plug-Flow detention time= 166.0 min calculated for 10,753 cf(98% of inflow) Center-of-Mass det. time= 156.3 min (928.2 - 771.9 ) Volume Invert Avail.Storage Storage Description #1A 163.90' 329 cf 106.00'W x 50.001 x 2.67'H Field A 14,133 cf Overall - 13,312 cf Embedded = 821 cf x 40.0% Voids #2A 163.90' 8,530 cf retain_it 2.0' x 78 Inside#1 Inside= 84.0"W x 24.0"H => 13.78 sf x 8.001= 110.3 cf Outside= 96.0"W x 32.0"H => 21.33 sf x 8,00'L= 170.7 of 13 Rows adjusted for 71.8 cf perimeter wall 8,859 cf Total Available Storage 1 505 Sutton Proposed Conditions Hydrologic Analysis Type ill 24-hr 10-Year Rainfall=4.80" Prepared by Microsoft Printed 8/13/2019 H droCADO 10.00-13 s!n 00401 0 2014 l i droCAD Software Solutions LLC Page 35 Storage Group A created with Chamber Wizard Device Routing___ Invert Outlet Devices - - #1 Primary 159.00' 12.0" Round Culvert L= 34.0' Ke= 0.500 Inlet/Outlet Invert= 159.00' 1 158.32' S= 0,0200 T Cc= 0.900 n= 0.012, Plow Area= 0.79 sf #2 Device 1 163.90' 3.0"Vert. Orifice/Grate C= 0.600 #3 Device 1 164,30' 8.0"W x 2.0" H Vert. Orifice/Grate C= 0.600 #4 Device 1 165.60' 4.0' long x 0.5' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 Coef. (English) 2.80 2.92 3.08 3.30 3.32 Primary OutFlow Max=0.63 cfs @ 12,61 hrs HW=164,96' TW=0.00' (Dynamic Tailwater) L1=Culvert (Passes 0.63 cfs of 8.84 cfs potential flow) 2=Orifice/Grate (Orifice Controls 0.23 cfs @ 4.65 fps) 3=Orifice/Grate (Orifice Controls 0.41 cfs @ 3.65 fps) =Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Summary for Pond 5P: Retain It Inflow Area = 16,214 sf,100.00% Impervious, Inflow Depth = 4.56" for 10-Year event Inflow - 1.64 cfs @ 12.08 hrs, Volume= 5,786 cf Outflow = 0.32 cfs @ 12.51 hrs, Volume= 5,786 cf, Atten= 81%, Lag= 25.8 min Discarded = 0.05 cfs @ 9.32 hrs, Volume= 4,749 cf Primary = 0.27 cfs @ 12.51 hrs, Volume= 1,037 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0,01 hrs 13 Peak Elev= 167.19' @ 12.51 hrs Surf.Area= 2,116 sf Storage= 2,488 cf Plug-Flow detention time= 316.5 min calculated for 5,784 cf(100% of inflow) Center-of-Mass det. time= 316.6 min ( 1,065.3- 748.7 ) Volume Invert Avall.Stora a Storage Description #1 165,50' 635 cf Custom Stage Data (Prismatic)Listed below (Recalc) 6,708 cf Overall - 5,120 of Embedded = 1,588 cf x 40.0% Voids #2 166.00' 3,308 cf retain it 2.0' x 30 Inside#1 Inside= 84.0"W x 24.0"H => 13.78 sf x 8.001 = 110.3 cf Outside= 96.0"W x 32.0"H => 21.33 sf x 8.001 170.7 cf 3,943 of Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 165.50 - 2,116 0 0 168.67 2,116 6,708 6,708 505 Sutton Proposed Conditions Hydrologic Analysis Type 1/124-hr 10-Year Rainfall=4.80" Prepared by Microsoft Printed 8/13/2019 H droCAD® 10.00-13 s/n 00401 02014 H droCAD Software Solutions LLC Page 36 Device Routing Invert Outlet Devices #1 Primary 165.40' 12.0" Round Culvert L= 30.0' Ke= 0.600 Inlet/Outlet Invert= 165.40'/ 164.95' S= 0.0150 7 Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 167.00' 12.0"W x 3.0" H Vert. Orifice/Grate C= 0.600 #3 Device 1 167,80' 9.0"Vert. OrificetGrate C= 0.600 #4 Device 1 168.00' 4.0' long x 0.5' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 Coef. (English) 2.80 2.92 3.08 3.30 3.32 #5 Discarded 165.50' 1.020 in/hr Exfiltration over Surface area Phase-In= 0.01' Discarded OutFlow Max=0.05 cfs @ 9.32 hrs HW=165.53' (Free Discharge) tom=Exfiltration (Exfiltration Controls 0.05 cfs) Primary OutFlow Max=0.27 cfs @ 12.51 hrs HW=167.19' TW=164.95' (Dynamic Tallwater) t._ =Culvert (Passes 0.27 cfs of 4.30 cfs potential flow) 2=00fice/Grate (Orifice Controls 0,27 cfs @ 1.40 fps) 3=0rifice/Grate ( Controls 0.00 cfs) Broad-Crested Rectangular Weir ( Controls 0.00 cfs) ' Summary for Pond 6P: Infiltration Trench Inflow Area = 2,552 sf,100.00% Impervious, Inflow Depth = 4.56" for 10-Year event Inflow - 0.27 cfs @ 12.08 hrs, Volume= 971 cf Outflow - 0.27 cfs @ 12.08 hrs, Volume= 971 cf, Atten= 0%, Lag= 0.1 min Discarded = 0.01 cfs @ 9.96 hrs, Volume= 375 cf Primary = 0.27 cfs @ 12.08 hrs, Volume= 595 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs/3 Peale Elev= 170.51' @ 12.08 hrs Surf.Area= 232 sf Storage= 71 cf Plug-Flow detention time= 82.2 min calculated for 970 of(100% of inflow) Center-of-Mass det. time= 82.3 min ( 831.0 -748.7 ) Volume Invert Avail.Storage Storage Description #1 169.00' 70 cf Stone Trench (Prismatic)Listed below (Recalc) 174 cf Overall x 40.0% Voids #2 170.50' 12 cf Area Over Trench (Prismatic)Listed below (Recalc) 81 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 169.00 116 0 0 170.50 116 174 174 Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 170.50 116 0 0 170.60 116 12 12 ,i 505 Sutton Proposed Conditions Hydrologic Analysis Type 11124-hr 90-Year Rainfall=4.80" Prepared by Microsoft Printed 8/13/2019 HydroCAD® 10_.00-13 s/n 00401 02014 HydroCAD Software Solutions LL.0 Page_37 Device Routing Invert Outlet Devices #1 Primary 170.50' 70.0' long x 1.0' 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 Coef. (English) 2.69 2.72 2.75 2.86 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32 #2 Discarded 169.00' 1.020 in/hr Exflltratlon over Surface area Phase-In= 0.01' Discarded OutFlow Max=0.01 cfs @ 9.96 hrs HW=170,50' (Free Discharge) t-2=Exfiltration (Exfiltration Controls 0.01 cfs) Primary OutFlow Max=0.27 cfs @ 12.08 hrs HW=170.51' TW=0.00' (Dynamic Tailwater) L1=Broad-Crested Rectangular Weir (Weir Controls 0.27 cfs @ 0.30 fps) 505 Sutton.Proposed Conditions Hydrologic Analysis Type 11124-hr 25-Year Rainfall=6.00" Prepared by Microsoft Printed 8/13/2019 HydroCAM 10.00-13 s/n 00401 02014 HydroCAD Software Solutions LLC Page 38 Summary for Subcatchment PSI: Runoff = 3,72 cfs @ 12.08 hrs, Volume= 12,668 cf, Depth= 5.41" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36,00 hrs, dt= 0.01 hrs Type III 24-hr 25-Year Rainfall=6.00" Area (sf) CN Description 3,170 74 >75% Grass cover, Good, HSG C 23,273 98 Paved parking, HSG C 661 98 Roofs, HSG C 987 98 Unconnected pavement, HSG C 28,091 95 Weighted Average 3,170 11.28% Pervious Area 24,921 88.72% Impervious Area 987 3.96% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS10: Runoff = 1.87 cfs @ 12.08 hrs, Volume= 6,647 cf, Depth= 5.76" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 25-Year Rainfall=6.00" Area_(so_ CN Description 13,844 98 Roofs, HSG C 13,844 100.00% Impervious Area Tc Length Slope Velocity Capacity Description min feet ftlft ft/sec cfs 6.0 Direct Entry, Summary for Subcatchment PSI 1: Runoff - 2.05 cfs @ 12.08 hrs, Volume= 7,305 cf, Depth= 5.76" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 25-Year Rainfall=6.00" Area (sq CN Description 15,214 98 Roofs, HSG C 15,214 100.00% Impervious Area f 505 Sutton Proposed Conditions Hydrologic Analysis Type 11124-hr 25-Year Rainfall=6.00" Prepared by Microsoft Printed 8/13/2019 H droCADO 10.00-13 sln 00401 0 2014 H droCAD Software Solutions LLC Page 39 Tc Length Slope Velocity Capacity Description j min -(feed (ftlft) (ft/sec) -_(cfs) - - 6.0 Direct Entry, Summary for Subcatchment PSI 2: 1 Runoff = 1.10 cfs @ 12.09 hrs, Volume= 3,403 cf, Depth= 3.18" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 25-Year Rainfall=6.00" Area (sf) CN Description 12,822 74 >75% Grass cover, Good, HSG C 12,822 100.00% Pervious Area Tc Length Slope Velocity Capacity Description Amin) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS2: Runoff - 1.80 cfs @ 12,08 hrs, Volume= 6,077 cf, Depth= 5.30" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 25-Year Rainfall=6.00" Area (so CN Description 2,572 74 >75% Grass cover, Good, HSG C 6,226 98 Paved parking, HSG C 1,474 98 Roofs, HSG C 3,495 98 Unconnected pavement, HSG C 13,767 94 Weighted Average 2,572 18.68% Pervious Area 11,195 81.32% Impervious Area 3,495 31.22% Unconnected Tc Length Slope Velocity Capacity Description . (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS3: Runoff - 1.09 cfs @ 12,08 hrs, Volume= 3,570 cf, Depth= 4.96" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 25-Year Rainfall=6.00" 505 Sutton Proposed Conditions Hydrologic Analysis Type 11124-hr 25-Year Rainfall=6.00" Prepared by Microsoft Printed 8113/2019 HydroCAD® 10.00-13 sln 00401 ©2014 HydroCAD Software Solutions LLC Page 40 Area (so CN Description 2,355 74 >75% Grass cover, Good, HSG C 5,874 98 Paved parking, HSG C 34 98 Roofs, HSG C 378 98 Unconnected pavement, HSG C 8,641 91 Weighted Average 2,355 27.25% Pervious Area 6,286 72.75% Impervious Area 378 6.01% Unconnected Tc Length Slope Velocity Capacity Description (min) feet (ft/ft) (ftlsec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS4: Runoff - 1.21 cfs @ 12.09 hrs, Volume= 3,757 cf, Depth= 3.78" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0,00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 25-Year Rainfall=6.00" Area (so CN Description 8,762 74 >75% Grass cover, Good, HSG C 3,160 98 Paved parking, HSG C 11,922 80 Weighted Average 8,762 73.49% Pervious Area 3,160 26.51% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (fUsec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS& Runoff - 1.39 cfs @ 12.09 hrs, Volume= 4,443 cf, Depth= 4.63" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 25-Year Rainfall=6.00" _ Area (sf) CN Description 4,846 74 >76% Grass cover, Good, HSG C 5,452 98 Paved parking, HSG C 95 98 Roofs, HSG C 1,133 98 Unconnected pavement, HSG C 11,526 88 Weighted Average 4,846 42.04% Pervious Area 6,680 57.96% Impervious Area 1,133 16.96% Unconnected 505 Sutton Proposed Conditions Hydrologic Analysis Type III 24-hr 25-Year Rainfall=6.00" Prepared by Microsoft Printed 8/13/2019 H droCAD® 10.00-13 s/n 00401 ©2014 H droCAD Software Solutions LLC Page 41 Tc Length Slope Velocity Capacity Description min feet ft/ft) (ft/sec) cfs 6.0 Direct Entry, Summary for Subcatchment PS6: Runoff - 0.46 cfs @ 12.09 hrs, Volume= 1,418 cf, Depth= 3.18" r Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 25-Year Rainfall=6.00" Areas CN Description 5,343 74 >75% Grass cover, Good, HSG C 5,343 100.00% Pervious Area Tc Length Slope Velocity Capacity Description min feet ft/ft) (ft/sec) (cfs 6.0 Direct Entry, Summary for Subcatchment PS7: Runoff - 0.23 cfs @ 12.09 hrs, Volume= 708 cf, Depth= 3.18" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0,01 hrs Type ill 24-hr 25-Year Rainfall=6.00" Area (sf CN Description 2,666 74 >75% Grass cover, Good, HSG C 2,666 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) Lftlft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS8: Runoff = 1.78 cfs @ 12,09 hrs, Volume= 5,547 cf, Depth= 3.18" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type Ili 24-hr 25-Year Rainfall=6.00" Area (sty_ CN Description 20,900 74 >75% Grass cover, Good HSG C 20,900 100.00% Pervious Area 505 Sutton Proposed Conditions Hydrologic Analysis Type 11124-hr 25-Year Rainfall=6.00" Prepared by Microsoft Printed 8/13/2019 HydroCADO 10.00-13 sln 00401 ©2014 HydroCAD Software Solutions LLC Pace 42 Tc Length Slope Velocity Capacity Description min feet ftlft Wsec cfs 4.9 50 0.0300 0.17 Sheet Flow, Grass: Short n= 0.150 P2= 3.10" 1.3 210 0.0290 2.74 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 0.0 20 0.3500 9.52 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 6.2 280 Total - - Summary for Subcatchment PS8A: Runoff - 0.34 cfs @ 12.08 hrs, Volume= 1,225 cf, Depth= 5.76" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 25-Year Rainfall=6.00" Areas CN Description 587 98 Roofs, HSG C 1,965 98 Unconnected pavement, HSG C 2,552 98 Weighted Average — - - — 2,552 100.00% Impervious Area 1,966 77.00% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ftisec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS9: Runoff - 2.42 cfs @ 12.08 hrs, Volume= 8,624 cf, Depth= 5.76" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 25-Year Rainfall=6.00" Area (sf) CN Description 17,961 ,.,.98 Roofs, HSG C - ^ 17,961 100.00% Impervious Area Tc Length Slope Velocity Capacity Description min (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Reach DP1: [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 126,309 sf, 78.59% Impervious, Inflow Depth > 4.07" for 25-Year event Inflow - 6.30 cfs @ 12.13 hrs, Volume= 42,803 cf Outflow -- 6.30 cfs @ 12.13 hrs, Volume= 42,803 cf, Atten= 0%, Lag= 0.0 min 1 505 Sutton Proposed Conditions Hydrologic Analysis Type 111 24-hr 25-Year Rainfall=6.00" Prepared by Microsoft Printed 8/13/2019 H droCAD® 10,00-13 sln 00401 O 2014 H dmCAD Software Solutions LLC Pa e 43 Routing by Dyn-Star-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs f 3 Summary for Reach DP2: [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 23,452 sf, 10.88% Impervious, Inflow Depth = 3.26" for 25-Year event j Inflow - 2.12 cfs @ 12.09 hrs, Volume= 6,362 cf Outflow W 2,12 cfs @ 12.09 hrs, Volume= 6,362 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Star-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs/3 Summary for Reach DP3: [40) Hint: Not Described (Outflow=Inflow) Summary for Reach DP4: [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 12,822 sf, 0.00% Impervious, Inflow Depth = 3.18" for 25-Year event Inflow - 1.10 cfs @ 12.09 hrs, Volume= 3,403 cf Outflow - 1,10 cfs @ 12.09 hrs, Volume= 3,403 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs / 3 Summary for Reach DP5: [401 Hint: Not Described (Outflow=Inflow) Inflow Area = 2,666 sf, 0.00% Impervious, Inflow Depth = 3.18" for 25-Year event Inflow -- 0.23 cfs @ 12.09 hrs, Volume= 708 cf Outflow = 0.23 cfs @ 12.09 hrs, Volume= 708 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs/3 Summary for Pond I P: Retain It Inflow Area = 31,945 sf, 76.90% Impervious, Inflow Depth = 5.11" for 25-Year event Inflow - 3.97 cfs @ 12.08 hrs, Volume= 13,612 cf Outflow 1.63 cfs @ 12.29 hrs, Volume= 13,612 cf, Atten= 59%, Lag= 12.5 min Discarded = 0.03 cfs @ 6,41 hrs, Volume= 2,970 cf Primary -- 1.59 cfs @ 12.29 hrs, Volume= 10,641 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 505 Sutton Proposed Conditions Hydrologic Analysis Type 11124-hr 25-Year Rainfall=6.00" Prepared by Microsoft Printed 8/13/2019 HydroCAD910.00-13 sin 00401 02014 HydroCAD Software Solutions LLC Page 44 Peak Elev= 165.06' @ 12.29 hrs Surf.Area= 1,460 sf Storage= 3,082 cf Plug-Flow detention time=45,8 min calculated for 13,608 cf(100% of inflow) Center-of-Mass det. time= 45.9 min ( 809.2 - 763.3 ) Volume Invert Avail.Storage Storage Description #1A 162.00' 867 cf 146.00'W x 10.00'L x 5.17'H Field A 7,543 of Overall -5,376 cf Embedded = 2,167 of x 40.0%Voids #2A 162.50' 3,870 cf retain it 4.0' x 18 Inside#1 Inside=84.0"W x 48.0"H => 28.87 sf) 8.00'L = 230.9 cf Outside= 96.0"W x 56.0"H => 37.33 sf x 8.00'L= 298.7 cf 18 Rows adjusted for 286.9 cf perimeter wall 4,737 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 162.50' 12.0" Round Culvert L= 112.0' Ke= 0.600 Inlet/Outlet Invert= 162.50' / 153.84' S= 0.0773 /' Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 162.50' 6.0"Vert, OrificelGrate C= 0.600 #3 Device 1 164.50' .3.0"Vert, Orifice/Grate C= 0.600 #4 Device 1 166.40' 12.0" Horiz. OrificelGrate C= 0,600 Limited to weir flow at low heads #5 Discarded 162.00' 1.020 inlhr Exfiltration over Surface area Phase-In= 0.01' Discarded OutFlow Max=0.03 cfs @ 6.41 hrs HW=162.05' (Free Discharge) t-5=Exflltration (Exfiltration Controls 0.03 cfs) Primary OutFlow Max=1.59 cfs @ 12.29 hrs HW=165.06' TW=0.40' (Dynamic Tailwater) t-E2=Orlflce/G ulvert (Passes 1.59 cfs of 5.42 cfs potential flow) rate (Orifice Controls 1.44 cfs @ 7.31 fps) =OrificelGrate (Orifice Controls 0.16 cfs @ 3.17 fps) =OrificelGrate (Controls 0,00 cfs) Summary for Pond 2P: Retain It Inflow Area = 13,767 sf, 81.32% Impervious, Inflow Depth = 5.30" for 25-Year event Inflow - 1.80 cfs @ 12.08 hrs, Volume= 6,077 cf Outflow = 0.77 cfs @ 12.27 hrs, Volume= 6,077 cf, Atten= 57%, Lag= 11.4 min Discarded = 0.02 cfs @ 7.53 hrs, Volume= 1,939 cf Primary = 0.75 cfs @ 12.27 hrs, Volume= 4,137 cf Routing by Dyn-Star-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Peak Elev= 164,71' @ 12.27 hrs Surf.Area= 900 sf Storage= 1,755 cf Plug-Flow detention time= 101.0 min calculated for 6,075 cf (100% of inflow) Center-of-Mass det. time= 101.0 min (869.5- 768.5) i i i 505 Sutton Proposed Conditions Hydrologic Analysis Type 11124-hr 25-Year Rainfall=6.04" 1 Prepared by Microsoft Printed 8/13/2019 H droCAD® 10.00-13 s/n 00401 ©2014 HydroCAD Software Solutions LLC Page 45 Volume Invert Avail.Storage Storage Description #1A 162.00' 400 cf 60.00M x 18.p0'L x 4.67'H Field A 4,200 cf Overall - 3,200 cf Embedded = 1,000 cf x 40.0% Voids #2A 162.60' 2,311 cf retain it 3.6' x 12 Inside#1 Inside= 84.0"W x 42.0"H => 25.10 sf x 8.001 = 200.8 cf Outside= 96,0"W x 50.0"H => 33.33 sf x 8.001= 266.7 cf 6 Rows adjusted for 98.2 of perimeter wall 2,711 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 162.50' 12.0" Round Culvert L= 23.0' Ke= 0.500 T Inlet/Outlet Invert= 162.50' 1 158.32' S= 0.1817 '1' Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 162.90' 4.0"Vert. Orifice/Grate C= 0.600 #3 Device 1 163.80' 3.0"Vert. Orifice/Grate C= 0.600 #4 Device 1 164.80' 4.0"Vert. Orifice/Grate C= 0.600 #5 Device 1 165.40' 12.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #6 Discarded 162.00' 1.020 inlhr Exflltration over Surface area Phase-In= 0.01' Discarded OutFlow Max=0.02 cfs @ 7.53 hrs HW=162.05' (Free Discharge) t-6=E=xfiitration (Exfiltration Controls 0.02 cfs) Primary OutFlow Max=0.75 cfs @ 12.27 hrs ,HW=164.71' TW=0.00' (Dynamic Tailwater) t--4t- =Culvert (Passes 0.75 cfs of 4.94 cfs potential flow) 2=Orifice/Grate (Orifice Controls 0.54 cfs @ 6.17 fps) 3=Orifice/Grate (Orifice Controls 0,21 cfs @ 4.26 fps) =Orifice/Grate ( Controls 0.00 cfs) =Orifice/Grate ( Controls 0.00 cfs) Summary for Pond 3P: Retain It Inflow Area = 13,844 sf,100.00% Impervious, Inflow Depth = 5.76" for 25-Year event Inflow -- 1.87 cfs @ 12.08 hrs, Volume= 6,647 cf Outflow = 1.43 cfs @ 12.15 hrs, Volume= 6,647 cf, Atten= 24%, Lag= 4.0 min Discarded = 0.01 cfs @ 3,96 hrs, Volume= 1,534 cf Primary = 1.41 cfs @ 12.15 hrs, Volume= 5,114 cf Routing by Dyn-Stor-Ind method, Time Span= 0,00-36.00 hrs, dt= 0.01 hrs!3 Peak Elev= 165.25' @ 12.15 hrs Surf.Area= 612 sf Storage= 1,186 cf Plug-Flow detention time= 80.2 min calculated for 6,645 cf(100% of inflow) Center-of-Mass det. time= 80.3 min ( 825.4- 745.1 ) 505 Sutton Proposed Conditions Hydrologic Analysis Type 11I 24-hr 25-Year Rainfall=6.00" Prepared by Microsoft Printed 8/13/2019 HydroCAM 10.00-13 sln 00401 02014 HydroCAD Software Solutions t,LC Page 46 Volume Invert Avail.Storage Storage Description #1A 162.50' 249 of 34.00'W x 18.00'L x 3.67'H Field A 2,244 of Overall - 1,621 of Embedded = 623 cf x 40.0%Voids #2A 163.00' 1,084 of retain it 2.5' x 8 Inside#1 Inside 84.0"W x 30.0"H => 17.56 sf x 8.00'L= 140.4 of Outside= 96.0"W x 38.0"H => 25.33 sf x 8.001 = 202.7 of _ 4 Rows adjusted for 39.6 of perimeter wall 1,333 of Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 163.50' 12.0" Round Culvert L= 23.0' Ke= 0.500 Inlet/Outlet Invert= 163.50'1 158.32' S= 0.2252 '/' Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 163.50' 4.0"Vert. Orifice/Grate C= 0.600 #3 Device 1 164.30' 6.0"Vert. Orifice/Grate C= 0.600 #4 Device 1 165,20' 12.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #5 Discarded 162.50' 1.020 inthr Exfiltration over Surface area Phase-In= 0.01' Discarded OutFlow Max=0.01 cfs @ 3.96 hrs HW=162.54' (Free Discharge) t-5=Exfiltration (Exfiltration Controls 0.01 cfs) Primary OutFlow Max=1.41 cfs @ 12.15 hrs HW=165.25' TW=0.00' (Dynamic Tailwater) t-E=Culvert (Passes 1.41 cfs of 4.22 cfs potential flow) =Orifice/Grate (Orifice Controls 0.53 cfs @ 6.05 fps) =Orifice/Grate (Orifice Controls 0.79 cfs @ 4.01 fps) =Orifice/Grate (Weir Controls 0.10 cfs @ 0.69 fps) Summary for Pond 4P: Retain It Inflow Area= 43,305 sf, 92.68% Impervious, Inflow Depth = 4,12" for 25-Year event Inflow - 3.72 cfs @ 12.08 hrs, Volume= 14,885 of Outflow - 0.81 cfs @ 12.71 hrs, Volume= 14,711 of, Atten= 78%, Lag= 37.8 min Primary - 0.81 cfs @ 12.71 hrs, Volume= 14,711 of Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Peak Elev= 165.38' @ 12,71 hrs Surf,Area= 5,300 sf Storage= 6,495 of Plug-Flow detention time= 157.8 min calculated for 14,707 of(99% of inflow) Center-of-Mass det. time= 150.4 min (917.3- 766.9 ) Volume Invert Avail.Stora a Storage Description #1A 163.90' 329 cf 106.00'W x 50.00'L x 2.67'H Field A 14,133 of Overall - 13,312 of Embedded = 821 of x 40.0% Voids #2A 163.90' 8,530 of retain it 2.0' x 78 Inside#1 Inside= 84,0"W x 24.0"H => 13.78 sf x 8.001= 110.3 of Outside= 96.0"W x 32.0"H => 21.33 sf x 8.001 = 170.7 of 13 Rows adjusted for 71.8 of perimeter wall 8,859 of Total Available Storage i i 505 Sutton Proposed Conditions Hydrologic Analysis Type 111 24-hr 25-Year Rainfall=6.00" Prepared by Microsoft Printed 8/13/2019 H droCAD® 10.00-13 sin 00401 ©2014 N droCAD Software Solutions LLC Page 47 Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 159.00' 12.0" Round Culvert L= 34.0' Ke= 0.500 Inlet/ Outlet Invert= 159.00'1158.32' S= 0.0200 '1' Cc= 0.900 i n= 0.012, Flow Area= 0.79 sf #2 Device 1 163.90' 3.0"Vert. Orifice/Grate C= 0.600 43 Device 1 164.30' 8.0"W x 2.0" H Vert. Orifice/Grate C= 0.600 #4 Device 1 165.60' 4.0' long x 0.5' breadth Broad-Crested Rectangular Weir Head (feet) 0,20 0.40 0.60 0.80 1.00 Coef. (English) 2.80 2.92 3.08 3.30 3.32 Primary Outt=low Max=0.81 cfs @ 12.71 hrs HW=165.38' TW=0.00' (Dynamic Tailwater) L =Culvert (Passes 0.81 cfs of 9.17 cfs potential flow) 2=OrificelGrate (Orifice Controls 0.28 cfs @ 5.61 fps) 3=Orifice/Grate (Orifice Controls 0.53 cfs @ 4.81 fps) =Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Summary for Pond 5P: Retain It Inflow Area = 15,214 sf,100.00% Impervious, Inflow Depth = 5.76" for 25-Year event Inflow = 2.05 cfs @ 12.08 hrs, Volume= 7,305 cf Outflow - 0.66 cfs @ 12.37 hrs, Volume= 7,305 cf, Atten= 68%, Lag= 17.4 min Discarded = 0.05 cfs @ 8.67 hrs, Volume= 5,088 cf Primary - 0.61 cfs @ 12.37 hrs, Volume= 2,217 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Peak Elev= 167.39' @ 12.37 hrs Surf.Area= 2,116 sf Storage= 2,826 cf Plug-Flow detention time= 276.6 min calculated for 7,303 cf(100% of inflow) Center-of-Mass det. time= 276.7 min ( 1,021.8- 745.1 ) Volume Invert Avail.Stora a Storage Description #1 165.50' 635 cf Custom Stage Data (Prismatic)Listed below(Recalc) 6,708 cf Overall - 5,120 cf Embedded = 1,588 of x 40.0% Voids #2 166.00' 3,308 cf retain it 2.0' x 30 Inside#1 Inside= 84.0"W x 24.0"H => 13.78 sf x 8.001 = 110.3 cf Outside= 96.0"W x 32.0"H => 21.33 sf x 8.001 = 170.7 cf 3,943 of Total Available Storage Elevation Surf.Area Inc.Store Cum.Store feet s -ft cubic-feet cubic-feet 165.50 2,116 0 0 168.67 2,116 6,708 6,708 i 505 Sutton Proposed Conditions Hydrologic Analysis Type 1/124-hr 25-Year Rainfall=6.00" Prepared by Microsoft Printed 8/13/2019 HydroCADO 10.00-13 sin 00401 0 2014 HydroCAD Software Solutions LLC Page 48 Device Routing Invert Outlet Devices #1 Primary 165.40' 12.0" Round Culvert L= 30.0' Ke= 0.500 Inlet 1 Outlet Invert 165.40' / 164.95' S= 0.0150 T Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 167.00' 12.0"W x 3.01' H Vert. Orifice/Grate C= 0.600 #3 Device 1 167.80' 9.0"Vert. Orifice/Grate C= 0.600 #4 Device 1 168.00' 4.0' long x 0.5' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 Coef. (English) 2.80 2.92 3.08 3.30 3.32 #5 Discarded 165.50' 1.020 in/hr Exfiltration over Surface area Phase-In= 0:01' Discarded OutFlow Max=0.05 cfs @ 8.67 hrs HW=165.53' (Free Discharge) t--5=Exfiltration (Exfiltration Controls 0.05 cfs) Primary OutFlow Max=0.61 cfs @ 12.37 hrs HW=167.39' TW=165.26' (Dynamic Tailwater) t-E=Culvert (Passes 0.61 cfs of 4.61 cfs potential flow) =Orifice/Grate (Orifice Controls 0.61 cfs @ 2.44 fps) =Ori#ice/Grate (Controls 0.00 cfs) =Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Summary for Pond GP: Infiltration Trench Inflow Area = 2,552 sf,100.00% Impervious, Inflow Depth = 5.76" for 25-Year event Inflow - 0.34 cfs @ 12.08 hrs, Volume= 1,225 cf Outflow - 0.34 cfs @ 12.08 hrs, Volume= 1,225 cf, Atten= 0%, Lag= 0.1 min Discarded = 0.01 cfs @ 9.06 hrs, Volume= 410 cf Primary - 0.34 cfs @ 12.08 hrs, Volume= 816 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Peak Elev= 170.51' @ 12.08 hrs Surf.Area= 232 sf Storage= 71 cf Plug-Flow detention time= 69.1 min calculated for 1,225 cf(100% of inflow) Center-of-Mass det. time= 69.2 min (814.3- 745.1 ) Volume Invert Avail.Storage Storage Description #1 169.00, 70 cf Stone Trench (Prismatic)Listed below(Recalc) 174 of Overall x 40.0% Voids #2 170.50' 12 of Area Over Trench (Prismatic)Listed below(Recalc) 81 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 169.00 116 0 0 170.50 116 174 174 Elevation Surf,Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 170.50 116 0 0 170.60 116 12 12 I I 505 Sutton Proposed Conditions Hydrologic Analysis Type !If 24-hr 25-Year Rainfall=6.00If Prepared by Microsoft Printed 8/13/2019 H droCAD® 10,00-13 s/n 00401 02014 H droCAD Software Solutions LLC Page 49 Device Routing Invert Outlet Devices Weir #1 Primary 170.50' 70.0' long x 1.0' breadth Broad-Crested Rectangular _ -- ....,,^, ..,,- ,_... .,.. 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 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32 #2 Discarded 169.00' 1.020 inlhr Exfiitratlon over Surface area Phase-In= 0.01' Discarded OutFlow Max=0.01 cfs @ 9.06 hrs HW=170.50' (Free Discharge) 1 --2=Exflltration (Exfiltration Controls 0.01 cfs) i Primary OutFlow Max=0.34 cfs @ 12.08 hrs HW=170.51' TW=0.00' (Dynamic Taliwater) t-1=Broad-Crested Rectangular Weir (Weir Controls 0.34 cfs @ 0.33 fps) i i 505 Sutton Proposed Conditions Hydrologic Analysi Type ill 24-hr 100-•Year Rainfall=8.60' Prepared by Microsoft Printed 8/13/2019 HydroCAD®10.00-13 s/n 00401 02014 HydroCAD Software Solutions LLC_ _ Page 50 Summary for Subcatchment PS1: Runoff = 5.39 cfs @ '12.08 hrs, Volume= 18,725 cf, Depth= 8.00" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfall=8.60" Area (sf) CN Description 3,170 74 >75% Grass cover, Good, HSG C 23,273 98 Paved parking, HSG C 661 98 Roofs, HSG C 987 98 95Unconnected pavement, HSG C 28,091 � .•.., --Weighted Average 3,170 11.28% Pervious Area 24,921 88.72% Impervious Area 987 3.96% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ftlsec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS10: Runoff = 2.68 cfs @ 12.08 hrs, Volume= 9,644 cf, Depth= 8.36" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfall=8.60" Area (so CN Description 13,844 98 Roofs, HSG C 13,844 100,00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftift) (ftlsec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS11: Runoff — 2.95 cfs @ 12.08 hrs, Volume= 10,599 cf, Depth= 8.36" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type Ill 24-hr 100-Year Rainfall=8.60" Area (sf) CN Description 15,214 98 Roofs, HSG C 15,214 100.00% Impervious Area I 1 505 Sutton Proposed Conditions Hydrologic Analysi Type 1/124-hr 100-Year-Rainfall=8.60" Prepared by Microsoft Printed 8/13/2019 H droCAD® 10,00-13 s/n 00401 O 2014 H droCAD Software Solutions LLC Page 51 I Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 6.0 Direct Entry, Summary for Subcatchment PS12: Runoff - 1.88 cfs @ 12.09 hrs, Volume= 5,840 cf, Depth= 5.47" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfall=8.60" Areas CN Description 12,822 74 >75% Grass cover, Good, HSG C 12,822 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (fUsec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS2: Runoff = 2.63 cfs @ 12.08 hrs, Volume= 9,039 cf, Depth= 7.88" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfall=8.60" Area (sf) CN Description 2,572 74 >76%Grass cover, Good, HSG C 6,226 98 Paved parking, HSG C 1,474 98 Roofs, HSG C 3,496 98 Unconnected pavement, HSG C 13,767 94 Weighted Average 2,572 18.68% Pervious Area 11,195 81.32% Impervious Area 3,495 31.22% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet) �ftltt} (ft/sec) (cfs) 6,0 Direct Entry, Summary for Subcatchment PS3: Runoff - 1.61 cfs @ 12.08 hrs, Volume= 5,413 cf, Depths 7,52" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfall=8.60" 505 Sutton Proposed Conditions Hydrologic Analysi Type ///24-hr 100-Year Rainfall=8.60" Prepared by Microsoft Printed 8/13/2019 HydroCAD® 10.00-13 s/n 00401 ©2014 HydroCAD Software Solutions LLC Page 52 Area (sf) CN Description 2,355 74 >75% Grass cover, Good, HSG C 5,874 98 Paved parking, HSG C 34 98 Roofs, HSG C 378 98 Unconnected pavement, HSG C 8,641 91 Weighted Average 2,355 27.25% Pervious Area 6,286 72.75% Impervious Area 378 6.01% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet) (M) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS4: Runoff 1.95 cfs @ 12.09 hrs, Volume= 6,149 cf, Depth= 6.19" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfall=8.60" Area (so CN Description _ 8,762 74 >75% Grass cover, Good, HSG C 3,160 98 Paved parking, HSG C 11,922 80 Weighted Average 8,762 73.49% Pervious Area 3,160 26.51% impervious Area Tc Length Slope Velocity Capacity Description min feet ft/ft) (ft/sec) (cfs 6.0 Direct Entry, Summary for Subcatchment PSS: Runoff -- 2.09 cfs @ 12.08 Ctrs, Volume= 6,873 cf, Depth= 7.16" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfall=8.60" Areas CN Description 4,846 74 >75% Grass cover, Good, HSG C 5,452 98 Paved parking, HSG C 95 98 Roofs, HSG C 1,133 98 Unconnected pavement, HSG C 11,526 . 88 Weighted Average 4,846 42.04% Pervious Area 6,680 57.96% Impervious Area 1,133 16,96% Unconnected I 505 Sutton Proposed Conditions Hydrologic Analysi Type fIl 24-hr 900-Year Rainfall=8.60" Prepared by Microsoft Printed 8/13/2019 H droCAD® 10.00-13 s/n 00401 ©2014 H droCAD Software Solutions LLC Page 53 i Tc Length Slope Velocity Capacity Description min feet fUft ftlsec cfs 6.0 Direct Entry, Summary for Subcatchment PS6: Runoff - 0.78 cfs @ 12.09 hrs, Volume= 2,434 cf, Depth= 6.47" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfall=8.60" Area (so CN Description 5,343 74 >76% Grass cover, Good HSG C 5,343 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft)___(ftlsec) (cfs) 6.0 Direct Entry, .,..,. Summary for Subcatchment PS7: Runoff - 0.39 cfs @ 12.09 hrs, Volume= 1,214 cf, Depth= 5.47" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfali=8.60" Area (sf) CN Description 2,666 74 >75% Grass cover, Good, HSG,C 2,666 100.00% Pervious Area Te Length Slope Velocity Capacity Description --(min) (feet) -- (ftlft)_ (fUsec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS8: Runoff = 3.04 cfs @ 12.09 hrs, Volume= 9,519 cf, Depth= 5.47" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfall=8.60" Area (so CN Description _ 201900 74 >75% Grass cover, Good HSG 20,900 100.00% Pervious Area 506 Sutton Proposed Conditions Hydrologic Analysi Type 11124-hr 100-Year Rainfall=8.60" Prepared by Microsoft Printed 8/13/2019 H droCADO 10.00-13 sin 00401 02014 H droCAD Software Solutions LLC Page 54 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 4.9 50 0.0300 0.17 Sheet Flow, Grass: Short n= 0.150 P2= 3.10" 1.3 210 0.0290 2.74 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 0.0 20 0.3500 9.52 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 6.2 280 Total Summary for Subcatchment PS8A: Runoff - 0.49 cfs @ 12.08 hrs, Volume= 1,778 of, Depth= 8.36" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfail=8.60" Areas CN Description 587 98 Roofs, HSG C 1,965 98 Unconnected pavement, HSG C _ 2,552 98 Weighted Average 2,552 100.00% Impervious Area 1,965 77.00% Unconnected To Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Subcatchment PS9: Runoff = 3.48 cfs @ 12.08 hrs, Volume= 12,513 of, Depth= 8.36" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type [ll 24-hr 100-Year Rainfall=8.60" Area (so CN Description 17,961 98 Roofs, HSG C 17,961 100.00% Impervious Area To Length Slope Velocity Capacity Description (min) (feet) Lftlft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Reach DPI: [401 Hint: Not Described (Outflow=Inflow) Inflow Area = 126,309 sf, 78.59% Impervious, Inflow Depth > 6.53" for 100-Year event Inflow = 10.12 cfs @ 12.11 hrs, Volume= 68,729 of Outflow - 10.12 cfs @ 12.11 hrs, Volume= 68,729 of, Atten= 0%, Lag= 0.0 min I 505 Sutton Proposed Conditions Hydrologic Analysi Type 111 24-hr 100-Year Rainfall=8.60" Prepared by Microsoft Printed 8/13/2019 HydroCAD010.00-13 sin 00401 O 2014 HydroCAD Software Solutions LLC _Page 55 Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Summary for Reach DP2: [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 23,452 sf, 10.88% Impervious, Inflow Depth 5.55" for 100-Year event Inflow -- 3.53 cfs @ 12.09 hrs, Volume= 10,839 of Outflow = 3.63 cfs @ 12.09 hrs, Volume= 10,839 of, Atten= 0%, Lag= 0.0 min Routing by Dyn-Star-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Summary for Reach DP3: [40] Hint: Not Described (Outflow=lnflow) Summary for Reach DP4: [40] Hint: Not Described (Outflow=Inflow) Inflow Area 12,822 sf, 0.00% Impervious, Inflow Depth = 5.47" for 100-Year event Inflow - 1.88 cfs @ 12.09 hrs, Volume= 5,840 of Outflow - 1.88 cfs @ 12.09 hrs, Volume= 5,840 of, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Summary for Reach DP5: [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 2,666 sf, 0.00% Impervious, Inflow Depth = 5.47" for 100-Year event Inflow = 0.39 cfs @ 12.09 hrs, Volume= 1,214 of Outflow - 0.39 cfs @ 12.09 hrs, Volume= 1,214 of, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Summary for Pond 9 P: Retain It Inflow Area = 31,945 sf, 75.90% Impervious, Inflow Depth = 7.66" for 100-Year event Inflow -- 6.88 cfs @ 12.08 hrs, Volume= 20,359 of .Outflow - 2.46 cfs @ 12.28 hrs, Volume= 20,359 of, Atten= 58%, Lag= 11.9 min Discarded = 0.03 cfs @ 4.20 hrs, Volume= 3,149 of Primary = 2.43 cfs @ 12.28 hrs, Volume= 17,210 of Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00rhrs, dt= 0.01 hrs 13 505 Sutton Proposed Conditions Hydrologic Analysi Type !fl 24-hr 100-Year Rainfall=8,60" Prepared by Microsoft Printed 8/13/2019 H droCADO 10.00-13 sln 00401 ©2014 H droCAD Software Solutions LLC Page 56 Peak Elev= 166,49' @ 12.28 hrs Surf.Area= 1,460 sf Storage=4,644 cf Plug-Flow detention time= 41.8 min calculated for 20,354 cf(100% of inflow) Center-of-Mass det. time=41.8 min ( 798.9- 757.1 ) Volume Invert Avail.Storage Storage Description #1A 162,00' 867 cf 146.00'W x 10.00'L x 5.17'H Field A 7,543 cf Overall - 5,376 cf Embedded = 2,167 cf x 40.0%Voids #2A 162.50' 3,870 cf retain_it 4.0' x 18 Inside#1 Inside= 84.0"W x 48.0"H => 28.87 sf x 8.001 = 230.9 cf Outside= 96.0"W x 56.0"H => 37.33 sf x 8.00'L = 298.7 cf 18 Rows adjusted for 286,9 cf perimeter wall 4,737 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices _ #1 Primary 162.50' 12.0" Round Culvert L= 112.0' Ke= 0.500 Inlet/Outlet Invert= 162.50'1 153.84' S= 0,0773 T Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 162,50' 6.0"Vert. Orifice/Grate C= 0.600 #3 Device 1 164.60' - 3.0"Vert. Orifice/Grate C= 0.600 #4_ Device 1 166.40' 12.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #5 Discarded 162.00' 1.020 inlhr Exfiitratlon over Surface area Phase-In= 0.01' Discarded OutFlow Max=0.03 cfs @ 4.20 hrs HW=162.05' (Free Discharge) Z--5=Exfiitratlon (Exfiitration Controls 0.03 cfs) Primary OutFlow Max=2.43 cfs @ 12.28 hrs HW=166.49' TW=0.00' (Dynamic Tailwater) t =Culvert (Passes 2.43 cfs of 7.06 cfs potential flow) 2=Orifice/Grate (Orifice Controls 1.83 cfs @ 9.31 fps) 3=OrificelGrate (Orifice Controls 0.32 cfs @ 6.58 fps) =OrificelGrate (Weir Controls 0.28 cfs @ 0.98 fps) Summary for Pond 2P: Retain It Inflow Area = 13,767 sf, 81.32% Impervious, Inflow Depth = 7.88" for 100-Year event Inflow = 2.63 cfs @ 12.08 hrs, Volume= 9,039 cf Outflow - 1.39 cfs @ 12.21 hrs, Volume= 9,039 cf, Atten=47%, Lag= 7.7 min Discarded = 0.02 cfs @ 5.82 hrs, Volume= 2,091 cf Primary - 1.37 cfs @ 12.21 hrs, Volume= 6,948 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Peak Elev= 165.46' @ 12.21 hrs Surf.Area= 900 sf Storage= 2,287 cf Plug-Flow detention time= 81.6 min calculated for 9,036 cf (100% of inflow) Center-of-Mass det. time= 81.7 min ( 841.4- 759.7) i i 505 Sutton Proposed Conditions Hydrologic Analysi Type 11124-hr 100-Year Rainfall=8.60" Prepared by Microsoft Printed 8/13/2019 HAroCAD010.00-13 sln 00401 ©2014 HydroCAD Software Solutions LLC Page 57 - - Volume Invert Avail.Stora a Storage Description #1A 162,00' 400 cf 50.00'W x 18.00%x 4.67'H Field A 4,200 of Overall - 3,200 cf Embedded = 1,000 cf x 40.0% Voids #2A 162.50' 2,311 cf retain it 3.5' x 12 Inside#1 Inside= 84.0"W x 42.0"H => 25.10 sf x 8.00'L = 200.8 cf Outside= 96.0"W x 50.0"H => 33.33 sf x 8.001 = 266.7 cf 6 Rows adjusted for 98.2 cf perimeter wall 2,711 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 162.50' 12.0" Round Culvert L= 23.0' Ke= 0.500 Inlet/Outlet Invert= 162.50'/ 158,32' S= 0.1817 T Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 162.90' 4.0" Vert. Orifice/Grate C= 0.600 #3 Device 1 163.80' 3.0" Vert. Orifice/Grate C= 0.600 #4 Device 1 164.80' 4.0" Vert. Orifice/Grate C= 0.600 #5 Device 1 166.40' 12.0" Horiz, Orifice/Grate C= 0,600 Limited to weir flow at low heads #6 Discarded 162.00' 1.020 inlhr Exfiltration over Surface area Phase-in= 0.01' Discarded OutFlow Max=0.02 cfs @ 5,82 hrs HW=162.05' (Free Discharge) t--6=Exfiltration (Exfiltration Controls 0.02 cfs) Primary OutFlow Max=1.37 cfs @ 12.21 hrs HW=165.45' TW=0.00' (Dynamic Tailwater) t- =Culvert (Passes 1.37 cfs of 5.93 cfs potential flow) 2=Orifice/Grate (Orifice Controls 0.65 cfs @ 7.44 fps) 3=0rificelGrate (Orifice Controls 0.29 cfs @ 5.96 fps) =Orifice/Grate (Orifice Controls 0.29 cfs @ 3.36 fps) =0riflce/Grate (Weir Controls 0.13 cfs @ 0.77 fps) Summary for Pond 3P: Retain It Inflow Area = 13,844 sf,100.00% Impervious, Inflow Depth = 8.36" for 100-Year event Inflow - 2.68 cfs @ 12.08 hrs, Volume= 9,644 cf Outflow = 2.59 cfs @ 12.11 hrs, Volume= 9,644 cf, Atten= 3%, Lag= 1.3 min Discarded = 0.01 cfs @ 2.38 hrs, Volume= 1,583 cf Primary - 2.58 cfs @ 12.11 hrs, Volume= 8,061 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Peak Elev= 166.43' @ 12.11 hrs Surf.Area= 612 sf Storage= 1,273 of Plug-Flow detention time= 63.6 min calculated for 9,642 cf (100% of inflow) Center-of-Mass det. time= 63.7 min ( 804.0-740.3 ) 505 Sutton Proposed Conditions Hydrologic Analysi Type if/24-hr 100-Year Rainfall=8.60" Prepared by Microsoft Printed 8/13/2019 HydroCAD® 10.00-13 s/n 00401 ©2014 HydroCAD Software Solutions LLC Page_58 Volume Invert Avaii.Storage Storage Description #1A 162.50' 249 cf 34.00'W x 18.00'L x 3.67'H Field A - 2,244 cf Overall - 1,621 cf Embedded = 623 cf x 40.0% Voids #2A 163.00' 1,084 cf retain_it 2.5' x 8 Inside#1 Inside= 84.0"W x 30.0"H => 17.56 sf x 8.001 = 140.4 cf Outside= 96.0"W x 38.0"H => 25.33 sf x 8.001 = 202.7 cf 4 Rows adjusted for 39.6 of perimeter wall _ 1,333 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 163.50' 12.0" Round Culvert L= 23.0' Ke= 0.500 Inlet/Outlet Invert= 163.50' 1 158,32' S= 0.2252 '/' Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 163.50' 4.0"Vert. Orifice/Grate C= 0.600 #3 Device 1 164.30' 6.0"Vert. Orifice/Grate C= 0.600 #4 Device 1 165.20' 12.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #5 Discarded 162.50' 1.020 in/hr Exfiltration over Surface area Phase-In= 0.01' Discarded OutFlow Max=0.01 cfs @ 2,38 hrs HW=162.54' (Free Discharge) t-5=Exfiltration (Exfiltration Controls 0.01 cfs) Primary OutFlow Max=2.57 cfs @ 12.11 hrs HW=165.43' TW=0.00' (Dynamic Tailwater) t1=Culvert (Passes 2.57 cfs of 4.52 cfs potential flow) 2=Orifice/Grate (Orifice Controls 0.56 cfs @ 6.39 fps) 3=Orifice/Grate (Orifice Controls 0.89 cfs @ 4.51 fps) =Orifice/Grate (Weir Controls 1.13 cfs @ 1.67 fps) Summary for Pond 4P: Retain It Inflow Area = 43,305 sf, 92.68% Impervious, Inflow Depth = 6.56" for 100-Year event Inflow = 6.22 cfs @ 12.09 hrs, Volume= 23,676 cf Outflow - 2.60 cfs @ 12.42 hrs, Volume= 23,488 cf, Atten= 58%, Lag= 19.8 min Primary W 2.60 cfs @ 12.42 hrs, Volume= 23,488 cf Routing by Dyn-Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs/3 Peak Elev= 165.87' @ 12.42 hrs Surf.Area= 5,300 sf Storage= 8,661 cf Plug-Flow detention time= 134.3 min calculated for 23,481 cf(99% of inflow) Center-of-Mass det. time= 129.2 min ( 890.8- 761.5) Volume Invert Avail.Storage Storage Description _ #1A 163,90' 329 cf 106.00'W x 50.001 x 2.67'H Field A 14,133 cf Overall - 13,312 cf Embedded = 821 cf x 40.0% Voids #2A 163.90' 8,530 cf retain_it 2.0' x 78 Inside#1 Inside= 84.0"W x 24.0"H => 13.78 sf x 8.001 = 110.3 cf Outside= 96.0"W x 32.0"H => 21.33 sf x 8.00'L = 170.7 of 13 Rows adjusted for 71.8 cf erimeter wall 8,859 cf Total Available Storage i 505 Sutton Proposed Conditions Hydrologic Analysi Type Ili 24-hr 100-Year Rainfall=8.60" Prepared by Microsoft Printed 8/13/2019 HydroCAD® 1 a.00-13 s/n 00401 02014 HydroCAD Software Solutions LLC Page 59 Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices E #1 Primary 159.00' 12.0" Round Culvert L= 34.0' Ke= 0.500 Inlet/Outlet Invert= 159,00' 1 158.32' S= 0.0200 T Cc= 0,900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 163.90' 3.0" Vert. Orifice/Grate C= 0,600 #3 Device 1 164.30' 8.0"W x 2.0" H Vert. Orifice/Grate C= 0.600 #4 Device 1 165.60' 4.0' long x 0.5' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 Coef. (English) 2.80 2.92 3.08 3.30 3.32 Primary OutFlow Max=2.60 cfs @ 12.42 hrs HW=166.87' TW=0.00' (Dynamic Tailwater) t-- =Culvert (Passes 2.60 cfs of 9.55 cfs potential flow) 2=OrificelGrate (Orifice Controls 0.32 cfs @ 6.55 fps) 3=OrificelGrate (Orifice Controls 0.65 cfs @ 5.88 fps) =Broad-Crested Rectangular Weir (Weir Controls 1.63 cfs @ 1.49 fps) Summary for Pond 5P: Retain It Inflow Area = 15,214 sf,100.00% Impervious, Inflow Depth = 8.36" for 100-Year event Inflow -- 2.95 cfs @ 12.08 hrs, Volume= 10,599 of Outflow - 1.22 cfs @ 12.28 hrs, Volume= 10,699 cf, Atten= 59%, Lag= 11.9 min Discarded 0.05 cfs @ 7.22 hrs, Volume= 5,648 cf Primary -- 1.17 cfs @ 12.28 hrs, Volume= 4,951 cf Routing by Dyn-Stor-Ind method, Time Span= 0,00-36,00 hrs, dt= 0.01 hrs 13 Peak Elev= 167.95' @ 12.28 hrs Surf.Area= 2,116 sf Storage= 3,797 cf Plug-Flow detention time= 226.7 min calculated for 10,599 cf(100% of inflow) Center-of-Mass det. time= 226,7 min ( 967.0- 740.3 ) Volume Invert Avail.Stora e Storage Description #1 165.50' 635 cf Custom Stage Data(Prismatic)Listed below (Recalc) 6,708 cf Overall - 5,120 cf Embedded = 1,588 cf x 40.0% Voids #2 166,00, 3,308 cf retain_it 2,0' x 30 Inside#1 Inside= 84.0"W x 24.0"H => 13.78 sf x 8.00'L = 110.3 cf Outside= 96.0"W x 32.0"H => 21.33 sf x 8.00'L = 170.7 cf 3,943 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 165.50 2,116 0 a 168.67 2,116 6,708 6,708 505 Sutton Proposed Conditions Hydrologic Analysi Type 11124-hr 100-Year Rainfall=8.60" Prepared by Microsoft Printed 8/13/2019 H droCAD® 10.00-13 sln 00401 ©2014 H droCAD Software Solutions LLC Page 60 Device Routing Invert Outlet Devices #1 Primary 165.40' 12.0" Round Culvert L= 30.0' Ke= 0.500 Inlet/Outlet Invert= 165.40' 1164.95' S= 0.0150 '1' Cc= 0.900 n= 0.012, Flow Area= 0.79 sf #2 Device 1 167.00' 12.0"W x 3.0" H Vert. Orif lce1G rate C= 0.600 #3 Device 1 167.80' 9.0"Vert. Orifice/Grate C= 0.600 #4 Device 1 168.00' 4.0' long x 0.5' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 Coef. (English) 2.80 2.92 3.08 3.30 3.32 #5 Discarded 165,50' 1.020 inlhr Exfiltration over Surface area Phase-In= 0.01' Discarded OutFlow Max=0.05 cfs @ 7.22 hrs HW=165.53' (Free Discharge) t-5=Exfiltration (Exfiltration Controls 0.0.5 cfs) Primary OutFlow Max=1.17 cfs @ 12.28 hrs HW=167.95' TW=165.81' (Dynamic Tailwater) t-E=Culvert (Passes 1.17 cfs of 5.41 cfs potential flow) =Orifice/Grate (Orifice Controls 1.09 cfs @ 4.36 fps) =OrificefGrate (Orifice Controls 0.08 cfs @ 1.31 fps) =Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Summary for Pond 6P: Infiltration Trench inflow Area = 2,552 sf,100.00% Impervious, Inflow Depth = 8.36" for 100-Year event Inflow - 0.49 cfs @ 12.08 hrs, Volume= 1,778 cf Outflow = 0.49 cfs @ 12.08 hrs, Volume= 1,778 cf, Atten= 0%, Lag= 0,0 min Discarded = 0.01 cfs @ 7.32 hrs, Volume= 458 cf Primary - 0.49 cfs @ 12.08 hrs, Volume= 1,320 cf Routing by Dyn-Star-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs 13 Peak Elev= 170.52' @ 12.08 hrs Surf.Area= 232 sf Storage= 72 of Plug-Flow detention time= 52.2 min calculated for 1,777 cf(100% of inflow) Center-of-Mass det. time= 52.3 min (792.6- 740.3) Volume Invert Avail.Storage Storage Description #1 169.00' 70 cf Stone Trench (Prismatic)Listed below(Recalc) 174 cf Overall x 40.0% Voids #2 170,50' 12 cf Area Over Trench Prismatic Listed below Recalc s 81 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store feet s -ft cubic-feet cubic-feet 169.00 116 0 0 170.50 116 174 174 Elevation Surf.Area Inc.Store Cum.Store (feet) _ - (sq-ft) (cubic-feet) (cubic-feet) 170.50 116 0 0 170.60 116 12 12 505 Sutton Proposed Conditions Hydrologic Analysi Type III 24-hr 100-Year Rainfal1=8.60" Prepared by Microsoft Printed 8/1312019 H droCADO 10,00-13 sln 00401 0 2014 H droCAD Software Solutions LLC Page 61 Device Routing Invert Outlet Devices #1 Primary 170.50' 70.0' long x 1.0' 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 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32 #2 Discarded 169.00' 1.020 inihr Exfiltration over Surface area Phase-In= 0.01' Discarded Outflow Max=0.01 cfs @ 7.32 hrs HW=170.50' (Free Discharge) L2=Exfiltration (Exfiltration Controls 0.01 cfs) Primary Outflow Max=0.49 cfs @ 12.08 hrs HW=170,52' TW=0.00' (Dynamic Tailwater) L1=Broad-Crested Rectangular Weir (Weir Controls 0,49 cfs @ 0.37 fps) i