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HomeMy WebLinkAboutDuthieExp_10Yr (New) (1) DuthieExpansion - 10 yr Rain Event DuthieExpansion Prepared by {enter your company name here} Printed 1/20/2026 HydroCAD® 10.00-26 s/n 01939 ©2020 HydroCAD Software Solutions LLC Page 1 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 0.048 98 Building, HSG C (ExPSC) 0.037 96 Gravel Parking, HSG C (2S) 0.074 96 Gravel parking, HSG C (ExPSC) 0.016 98 Rooftop, Good, HSG C (2S) 0.254 72 Woods/grass comb., Good, HSG C (2S, ExExist, ExPSC) 0.429 82 TOTAL AREA DuthieExpansion - 10 yr Rain Event DuthieExpansion Prepared by {enter your company name here} Printed 1/20/2026 HydroCAD® 10.00-26 s/n 01939 ©2020 HydroCAD Software Solutions LLC Page 2 Ground Covers (all nodes) HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.000 0.048 0.000 0.000 0.048 Building ExPSC 0.000 0.000 0.037 0.000 0.000 0.037 Gravel Parking 2S 0.000 0.000 0.074 0.000 0.000 0.074 Gravel parking ExPSC 0.000 0.000 0.016 0.000 0.000 0.016 Rooftop, Good 2S 0.000 0.000 0.254 0.000 0.000 0.254 Woods/grass comb., Good 2S, ExExist, ExPSC 0.000 0.000 0.429 0.000 0.000 0.429 TOTAL AREA DuthieExpansion - 10 yr Rain Event DuthieExpansion Type // 24-hr Rainfall=3.39" Prepared by {enter your company name here} Printed 1/20/2026 HydroCAD® 10.00-26 s/n 01939 ©2020 HydroCAD Software Solutions LLC Page 3 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment2S: Expansion Proposed Runoff Area=3,208 sf 21.82% Impervious Runoff Depth>2.19" Tc=6.0 min CN=90 Runoff=0.29 cfs 0.013 of Subcatchment ExExist: Expansion Existing Runoff Area=9,351 sf 0.00% Impervious Runoff Depth>0.94" Tc=6.0 min CN=72 Runoff=0.39 cfs 0.017 of SubcatchmentExPSC: Expansion Proposed Runoff Area=6,143 sf 34.19% Impervious Runoff Depth>2.47" Tc=6.0 min CN=93 Runoff=0.60 cfs 0.029 of Reach ExE: Design Point Existing Inflow=0.39 cfs 0.017 of Outflow=0.39 cfs 0.017 of Reach ExP: Design Point Proposed Inflow=0.60 cfs 0.029 of Outflow=0.60 cfs 0.029 of Pond AB: Attenuation Basin Peak Elev=1.69' Storage=545 cf Inflow=0.29 cfs 0.013 of Discarded=0.00 cfs 0.001 of Primary=0.00 cfs 0.000 of Outflow=0.00 cfs 0.001 of Total Runoff Area = 0.429 ac Runoff Volume = 0.059 of Average Runoff Depth = 1.66" 85.03% Pervious = 0.365 ac 14.97% Impervious = 0.064 ac DuthieExpansion - 10 yr Rain Event DuthieExpansion Type 11 24-hr Rainfall=3.39" Prepared by {enter your company name here} Printed 1/20/2026 HydroCAD® 10.00-26 s/n 01939 ©2020 HydroCAD Software Solutions LLC Page 4 Summary for Subcatchment 2S: Expansion Proposed Subcatchment Runoff = 0.29 cfs @ 11.97 hrs, Volume= 0.013 af, Depth> 2.19" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr Rainfall=3.39" Area (sf) CN Description 1,610 96 Gravel Parking, HSG C 898 72 Woods/grass comb., Good, HSG C 700 98 Rooftop, Good, HSG C 3,208 90 Weighted Average 2,508 78.18% Pervious Area 700 21.82% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, 6 Minute Minimum Subcatchment 2S: Expansion Proposed Subcatchment Hydrograph 0.32 ---- ------------------- 0.3 ----'- - - - - - 0.29cfs ----------' —Runoff 0.28 --------+-- - ---- F---------- 0.26 ----',- -----'_ Type 11 24,hr_ RmnfalI�3.-3 "- 022 - --- ----_ -- ---;--- --- --- --- --Runoff Area=3,20gs-f-- 0.2 --------+---- ----+----,---- ---- --------+ - Runoff Volume=0.013',-af-- 0 0.16 --------+---- ---- ------------------ Rurroff,Depth>2.19"_ u_ 0.14 -------- ----;-------------;--- ------------- ----------- --------- 0.12 ----' !---- --- --- 1 ---L---- 1---- Tr.=6.0_min_ 0.1 -----I---- ----Ir----I��----!---- -- -I ---r-------- ---------II `jN=r717-- 0.08 --- -- --- --- 1 L- ----1----L- 0.04 ----'-- -1----1 L----1----1---- - 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) DuthieExpansion - 10 yr Rain Event DuthieExpansion Type // 24-hr Rainfall=3.39" Prepared by {enter your company name here} Printed 1/20/2026 HydroCAD® 10.00-26 s/n 01939 ©2020 HydroCAD Software Solutions LLC Page 5 Summary for Subcatchment ExExist: Expansion Existing Subcatchment Runoff = 0.39 cfs @ 11.98 hrs, Volume= 0.017 af, Depth> 0.94" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr Rainfall=3.39" Area (sf) CN Description 9,351 72 Woods/grass comb., Good, HSG C 9,351 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, 6 Minute Minimum Subcatchment ExExist: Expansion Existing Subcatchment Hydrograph 0.42 0.4 0.39 cfs —Runoff 0.38 --------- ---- ---------r-------- ----------- - - - - - - - - - - - 0.36 Type II 24-hr 0.34 0.32 -- ------------- --- -------------- ---Rainfall=3.39" 03 0.28 Runoff Area=9,351 sf 0.26 -Runof Volume=0.017 of 02 Runoff Depth>0.94"0 LL 0.18 Tc=6.0 m i n 0.16 0.14 CIV=72 0.12 --------- - 0.1 0.08 0.06 - - - - - - - - r - - - - - - - 0.04 0.02. 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) DuthieExpansion - 10 yr Rain Event DuthieExpansion Type 11 24-hr Rainfall=3.39" Prepared by {enter your company name here} Printed 1/20/2026 HydroCAD® 10.00-26 s/n 01939 ©2020 HydroCAD Software Solutions LLC Page 6 Summary for Subcatchment ExPSC: Expansion Proposed Subcatchment Runoff = 0.60 cfs @ 11.96 hrs, Volume= 0.029 af, Depth> 2.47" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr Rainfall=3.39" Area (sf) CN Description 3,217 96 Gravel parking, HSG C 2,100 98 Building, HSG C 826 72 Woods/grass comb., Good, HSG C 6,143 93 Weighted Average 4,043 65.81% Pervious Area 2,100 34.19% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, 6 Minute Minimum Subcatchment ExPSC: Expansion Proposed Subcatchment Hydrograph 0.65 --- ---- -- 0.60 cfs —Runoff 0.6 ------- -,,--- --- r---- - ---- 0.55 --------- ---- ---J'---- ' --- --- --- ---!Type II 24 hr_ 0.45 -------- ';-------------' -------- - - - Runoff Area=6,143 sf- 0.4 ---- ----+----+---- +--- --- - Runoff 1�or'm-=0.023';af- 0.35 --------+------------- ----'---- ---- - ---- ---- ----------------- --- 3 I -- Runoff Depth>2.47' L0.3 --------+---------'---- ----'--- 1---- i �- c=6 0-rnin-- 0.25 ----'---- ---- ----=---- L- - _ 0.2 -------- -------- ----'--- --- -------- ---- -------CN=93-- 0.15 ----------------------L----'--- 1 ---L- ----1----L----1---- ---- '---- 0.1 ---- ---- --------=----L----'--- 1 ---L----1----1----L----1---------'-- 0.05 - -----L----L----'-- -L- -L----1----1----L----1----L----'---- 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) DuthieExpansion - 10 yr Rain Event DuthieExpansion Type 11 24-hr Rainfall=3.39" Prepared by {enter your company name here} Printed 1/20/2026 HydroCAD® 10.00-26 s/n 01939 ©2020 HydroCAD Software Solutions LLC Page 7 Summary for Reach ExE: Design Point Existing [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 0.215 ac, 0.00% Impervious, Inflow Depth > 0.94" Inflow = 0.39 cfs @ 11.98 hrs, Volume= 0.017 of Outflow = 0.39 cfs @ 11.98 hrs, Volume= 0.017 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Reach ExE: Design Point Existing Hydrograph 0.42 --- ---------------I -i--- ---- -Inflow 0.4 ,-- -- 0.39cfs —Outflow 0.38 --- ----r----r---7----r-------- ---- r----I----r----I- --- ---------------------0.36 ----�,----i- i li li i ----InflVrY Ar-laa=0.245-ac-- 0.3 --- ---- ----'---- ----'----'---- ----'----'---- ----'---- ----'----'---- 0.28 --- ----1----'---- ---- -------- - -----'---- ----'-- O0.2 -------------------' ---------'--- -----------------=---- LL 0.16 ---- ----=---------' ---------'--- ---------------------- ' 0.14 --- i ----'---- ----'-- 0.12 --- ----+----'---- ---- ------- r---- '---- ---- - i 0.08 ----r----r----r---r----r----i--- r ---r---�----r---r----r----i---- T---- 0.04 ---------- 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) DuthieExpansion - 10 yr Rain Event DuthieExpansion Type 11 24-hr Rainfall=3.39" Prepared by {enter your company name here} Printed 1/20/2026 HydroCAD® 10.00-26 s/n 01939 ©2020 HydroCAD Software Solutions LLC Page 8 Summary for Reach ExP: Design Point Proposed [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 0.215 ac, 29.94% Impervious, Inflow Depth > 1.62" Inflow = 0.60 cfs @ 11.96 hrs, Volume= 0.029 of Outflow = 0.60 cfs @ 11.96 hrs, Volume= 0.029 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Reach ExP: Design Point Proposed Hydrograph 0.65 0.6 - -- _ --- ------0.60cfs ---- —Inflow ------------ --- ----II-- I----- —Outflow -- Inflow Area=0.215-ac-- 0.5 --- ------------- ---- -------- ------ --- 0.45 --- ----+--------1---- -------- ------ ----- ---- I � I I I I I I _ 0.4 --- --------- ---- ---- ------- --------µ--- ------------ I —' 0.35 ------- ------ ---- ------- , 0.3 --- ---- --------1----L------- -------- ----L- LL 0.25 ---J----1----1----1----L----1--- -------- ---- ----1----1-------- ---- I 0.2 --- ---- -------- ----'----'--- --------'---- -------- -------- ---- I I I I I 0.15 --- ---------'---- ---------'- ---1----1----L----1---- ----'----'---- I 0.1 -------------'---- ----'----'-- - ---1----1----L----1---- -------- ---- I 0.05 -1----1---------'-- -L- --'----1---------'---- -------- ---- I I I I I 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) DuthieExpansion - 10 yr Rain Event DuthieExpansion Type 11 24-hr Rainfall=3.39" Prepared by {enter your company name here} Printed 1/20/2026 HydroCAD® 10.00-26 s/n 01939 ©2020 HydroCAD Software Solutions LLC Page 9 Summary for Pond AB: Attenuation Basin Inflow Area = 0.074 ac, 21.82% Impervious, Inflow Depth > 2.19" Inflow = 0.29 cfs @ 11.97 hrs, Volume= 0.013 of Outflow = 0.00 cfs @ 20.00 hrs, Volume= 0.001 af, Atten= 100%, Lag= 482.0 min Discarded = 0.00 cfs @ 20.00 hrs, Volume= 0.001 of Primary = 0.00 cfs @ 5.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 1.69' @ 20.00 hrs Surf.Area= 522 sf Storage= 545 cf Plug-Flow detention time= 337.3 min calculated for 0.001 of(7% of inflow) Center-of-Mass det. time= 129.8 min ( 894.9 - 765.1 ) Volume Invert Avail.Storage Storage Description #1 0.00, 870 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 0.00 140 0 0 1.00 350 245 245 2.00 600 475 720 2.50 0 150 870 Device Routing Invert Outlet Devices #1 Primary 1.90' 2.0' long x 2.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 Coef. (English) 2.54 2.61 2.61 2.60 2.66 2.70 2.77 2.89 2.88 2.85 3.07 3.20 3.32 #2 Discarded 0.00' 0.100 in/hr Exfiltration over Surface area Discarded OutFlow Max=0.00 cfs @ 20.00 hrs HW=1.69' (Free Discharge) L2=Exfiltration (Exfiltration Controls 0.00 cfs) Primary OutFlow Max=0.00 cfs @ 5.00 hrs HW=0.00' (Free Discharge) L1=Broad-Crested Rectangular Weir( Controls 0.00 cfs) DuthieExpansion - 10 yr Rain Event DuthieExpansion Type // 24-hr Rainfall=3.39" Prepared by {enter your company name here} Printed 1/20/2026 HydroCAD® 10.00-26 s/n 01939 ©2020 HydroCAD Software Solutions LLC Page 10 Pond AB: Attenuation Basin Hydrograph 0.32 -- 0.3 -----------------' - -- 0.29cfs --- - - - - - - - - - - - - - - - - - - - - - - - - - - - - —Inflow —Outflow 0.28. - -,- - - - -- --- ---- —Discarded 0.26 ------------ ----I- Inflow Area=0.074 ac —Primary I I I I i 0.24 -1---4---- ---4---- --- - Peak Elev=1 .69' I I I I I 0.22 ----;----I --- ---- ---- -- 0.2. --- ----,---- ---,_ ---- ---- ---- - Storage=545-cf II H 0.18 --- ---- I- I I I 3 0.16 ---i---- --- ---- --- I---- -- o --- I --0.14 -- ----i--- --- - ---- - 0.12 ___-__ - 0.1 0.08 ------------------------ ---- 1 0.06 7 I I 0.04 0.00 cfs 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours)