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Subcatchment Plans
LEGENDEXISTING MINOR CONTOURPROPERTY LINETIME OF CONCENTRATIONFLOW PATHSUBCATCHMENT BOUNDARYSUBCATCHMENT IDEXISTING MAJOR CONTOUR490DRAWING NO.PROJECT NO.PROJECT DRAWING TITLEDATE:REVISIONS DATE DESCRIPTION STUDIO ALANDSCAPE ARCHITECTURE +ENGINEERING, DPCMAILING:PO BOX 272SARATOGA SPRINGS, NY 12866OFFICE LOCATION:480 BROADWAY, SUITE 324SARATOGA SPRINGS, NY 12866(518) 832-4005IT IS A VIOLATION OF NEW YORK STATEEDUCATION LAW FOR ANY PERSON, UNLESSTHEY ARE ACTING UNDER THE DIRECTION OF ALICENSED PROFESSIONAL ENGINEER,ARCHITECT, LANDSCAPE ARCHITECT, OR LANDSURVEYOR, TO ALTER ANY ITEM IN ANY WAY.IF AN ITEM BEARING THE STAMP OF ALICENSED PROFESSIONAL IS ALTERED, THEALTERING LICENSED PROFESSIONAL SHALLSTAMP THE DOCUMENT AND INCLUDE THENOTATION "ALTERED BY" FOLLOWED BY THEIRSIGNATURE, THE DATE OF SUCH ALTERNATION,AND SPECIFIC DESCRIPTION OF THEALTERATION.01/11/202120054LEUCI RESIDENCE 277 CHESTNUT RIDGE ROAD QUEENSBURY, NY 12804 FOOTHILL BUILDERS 9 MOUNTAINSIDE DRIVE QUEENSBURY, NY 12804DWG OFPREPARED FOR 10/28/2020 PERMITS&CONSTRUCTION 01/11/2021 SITE PLAN REVIEW1PRE-CONSTRUCTION SUBCATCHMENT PLANSCALE: 1" = 20'SC-112PRE-CONSTRUCTION SUBCATCHMENT PLAN1020400201 inch = 20 feetGRAPHIC SCALEDESIGN POINT #2Q25-YR = 3.67 CFSMAP REFERENCE:BASE SURVEY INFORMATION OBTAINED FROM "MAP OF A SURVEY MADE FOR JOSEPHG. LEUCI & JILL E. LEUCI, TOWN OF QUEENSBURY, COUNTY OF WARREN, STATE OFNEW YORK" PRODUCED BY RUSSELL E. HOWARD LICENSED LAND SURVEYING, DATEDSEPTEMBER 28, 2020. SUPPLEMENTAL FLOOD ZONE INFORMATION WAS ADDED ON10/28/2020 BY RUSSELL E. HOWARD LICENSED LAND SURVEYING.DESIGN POINT #1Q25-YR = 1.89 CFS1S2S1SEXISTING G R A V E L D R I V E W A Y ADJOININ G D R I V E W A Y 505507 510 50 7 50 8 50 9 5 0 6 509 506 510 508 50 551 1 511505 51050950850750650 3 50 2 501 50 0 49 9 50 4 50 3 503 502 501 5 0 4LEGENDEXISTING MINOR CONTOURPROPERTY LINETIME OF CONCENTRATIONFLOW PATHSUBCATCHMENT BOUNDARYSUBCATCHMENT IDEXISTING MAJOR CONTOUR490PROPOSED CONTOUR2SDRAWING NO.PROJECT NO.PROJECT DRAWING TITLEDATE:REVISIONS DATE DESCRIPTION STUDIO ALANDSCAPE ARCHITECTURE +ENGINEERING, DPCMAILING:PO BOX 272SARATOGA SPRINGS, NY 12866OFFICE LOCATION:480 BROADWAY, SUITE 324SARATOGA SPRINGS, NY 12866(518) 832-4005IT IS A VIOLATION OF NEW YORK STATEEDUCATION LAW FOR ANY PERSON, UNLESSTHEY ARE ACTING UNDER THE DIRECTION OF ALICENSED PROFESSIONAL ENGINEER,ARCHITECT, LANDSCAPE ARCHITECT, OR LANDSURVEYOR, TO ALTER ANY ITEM IN ANY WAY.IF AN ITEM BEARING THE STAMP OF ALICENSED PROFESSIONAL IS ALTERED, THEALTERING LICENSED PROFESSIONAL SHALLSTAMP THE DOCUMENT AND INCLUDE THENOTATION "ALTERED BY" FOLLOWED BY THEIRSIGNATURE, THE DATE OF SUCH ALTERNATION,AND SPECIFIC DESCRIPTION OF THEALTERATION.01/14/202120054LEUCI RESIDENCE 277 CHESTNUT RIDGE ROAD QUEENSBURY, NY 12804 FOOTHILL BUILDERS 9 MOUNTAINSIDE DRIVE QUEENSBURY, NY 12804DWG OFPREPARED FOR 10/28/2020 PERMITS&CONSTRUCTION 01/14/2021 SITE PLAN REVIEW1POST-CONSTRUCTION SUBCATCHMENT PLANSCALE: 1" = 20'SC-222POST-CONSTRUCTION SUBCATCHMENT PLAN1020400201 inch = 20 feetGRAPHIC SCALEDESIGN POINT #2Q25-YR = 2.36 CFSMAP REFERENCE:BASE SURVEY INFORMATION OBTAINED FROM "MAP OF A SURVEY MADE FOR JOSEPHG. LEUCI & JILL E. LEUCI, TOWN OF QUEENSBURY, COUNTY OF WARREN, STATE OFNEW YORK" PRODUCED BY RUSSELL E. HOWARD LICENSED LAND SURVEYING, DATEDSEPTEMBER 28, 2020. SUPPLEMENTAL FLOOD ZONE INFORMATION WAS ADDED ON10/28/2020 BY RUSSELL E. HOWARD LICENSED LAND SURVEYING.DESIGN POINT #1Q25-YR = 1.26 CFS1S3S1SADJOININ G D R I V E W A Y 1S Existing Subcatchment 1 2S Existing Subcatchment 2 Routing Diagram for 20054_EXISTING Prepared by Microsoft, Printed 1/11/2021 HydroCAD® 10.00-26 s/n 09853 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link Type II 24-hr 25-yr Rainfall=4.41"20054_EXISTING Printed 1/11/2021Prepared by Microsoft Page 2HydroCAD® 10.00-26 s/n 09853 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Existing Subcatchment 1 Runoff = 1.89 cfs @ 11.96 hrs, Volume= 0.079 af, Depth> 1.53" 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 25-yr Rainfall=4.41" Area (sf) CN Description 11,117 79 <50% Grass cover, Poor, HSG B 15,939 65 Woods/grass comb., Fair, HSG B 27,056 71 Weighted Average 27,056 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 4.7 70 0.0800 0.25 Sheet Flow, Grass: Short n= 0.150 P2= 2.54" 0.2 32 0.1500 2.71 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 4.9 102 Total Summary for Subcatchment 2S: Existing Subcatchment 2 Runoff = 3.67 cfs @ 11.98 hrs, Volume= 0.160 af, Depth> 1.53" 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 25-yr Rainfall=4.41" Area (sf) CN Description 23,976 79 <50% Grass cover, Poor, HSG B 30,271 65 Woods/grass comb., Fair, HSG B 412 96 Gravel surface, HSG B 54,659 71 Weighted Average 54,659 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 4.7 68 0.0780 0.24 Sheet Flow, Grass: Short n= 0.150 P2= 2.54" 0.6 73 0.0950 2.16 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.7 60 0.0800 1.41 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 6.0 201 Total 1S Post-Subcatchment 1 2S Post -Subcatchment 2 3S Post-Subcatchment 3 3P Detention Basin 11P Design Point #2 Routing Diagram for 20054_POST Prepared by Microsoft, Printed 1/15/2021 HydroCAD® 10.00-26 s/n 09853 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link Type II 24-hr 25-yr Rainfall=4.41"20054_POST Printed 1/15/2021Prepared by Microsoft Page 2HydroCAD® 10.00-26 s/n 09853 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Post-Subcatchment 1 Runoff = 1.26 cfs @ 11.90 hrs, Volume= 0.052 af, Depth= 1.09" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-97.00 hrs, dt= 0.05 hrs Type II 24-hr 25-yr Rainfall=4.41" Area (sf) CN Adj Description 9,526 61 >75% Grass cover, Good, HSG B 13,392 58 Woods/grass comb., Good, HSG B 292 98 Unconnected roofs, HSG B 1,958 98 Roofs, HSG B 25,168 63 62 Weighted Average, UI Adjusted 22,918 91.06% Pervious Area 2,250 8.94% Impervious Area 292 12.98% Unconnected Summary for Subcatchment 2S: Post -Subcatchment 2 Runoff = 0.83 cfs @ 11.90 hrs, Volume= 0.035 af, Depth= 2.56" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-97.00 hrs, dt= 0.05 hrs Type II 24-hr 25-yr Rainfall=4.41" Area (sf) CN Description 3,042 61 >75% Grass cover, Good, HSG B 1,873 98 Roofs, HSG B 2,202 96 Gravel surface, HSG B 7,117 82 Weighted Average 5,244 73.68% Pervious Area 1,873 26.32% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.1 13 1.0000 3.90 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.54" 0.5 36 0.0270 1.13 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.54" 0.1 76 0.1000 24.31 324.11 Parabolic Channel, W=10.00' D=2.00' Area=13.3 sf Perim=11.0' n= 0.022 Earth, clean & straight 0.7 125 Total Summary for Subcatchment 3S: Post-Subcatchment 3 Runoff = 1.81 cfs @ 11.98 hrs, Volume= 0.092 af, Depth= 0.97" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-97.00 hrs, dt= 0.05 hrs Type II 24-hr 25-yr Rainfall=4.41" Type II 24-hr 25-yr Rainfall=4.41"20054_POST Printed 1/15/2021Prepared by Microsoft Page 3HydroCAD® 10.00-26 s/n 09853 © 2020 HydroCAD Software Solutions LLC Area (sf) CN Description 20,624 61 >75% Grass cover, Good, HSG B 28,393 58 Woods/grass comb., Good, HSG B 413 96 Gravel surface, HSG B 49,430 60 Weighted Average 49,430 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 4.6 75 0.1000 0.27 Sheet Flow, Grass: Short n= 0.150 P2= 2.54" 1.1 100 0.0850 1.46 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 5.7 175 Total Summary for Pond 3P: Detention Basin Inflow Area = 0.163 ac, 26.32% Impervious, Inflow Depth = 2.56" for 25-yr event Inflow = 0.83 cfs @ 11.90 hrs, Volume= 0.035 af Outflow = 0.77 cfs @ 11.91 hrs, Volume= 0.032 af, Atten= 8%, Lag= 0.8 min Primary = 0.77 cfs @ 11.91 hrs, Volume= 0.032 af Routing by Stor-Ind method, Time Span= 5.00-97.00 hrs, dt= 0.05 hrs / 2 Peak Elev= 502.53' @ 11.91 hrs Surf.Area= 287 sf Storage= 209 cf Plug-Flow detention time= 68.3 min calculated for 0.032 af (91% of inflow) Center-of-Mass det. time= 21.0 min ( 834.6 - 813.6 ) Volume Invert Avail.Storage Storage Description #1 501.00' 372 cf Custom Stage Data (Conic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (cubic-feet) (cubic-feet) (sq-ft) 501.00 20 0 0 20 502.00 181 87 87 184 503.00 403 285 372 414 Device Routing Invert Outlet Devices #1 Primary 502.25'2.0' long x 1.5' 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) 2.62 2.64 2.64 2.68 2.75 2.86 2.92 3.07 3.07 3.03 3.28 3.32 Primary OutFlow Max=0.74 cfs @ 11.91 hrs HW=502.52' (Free Discharge) 1=Broad-Crested Rectangular Weir (Weir Controls 0.74 cfs @ 1.37 fps) Type II 24-hr 25-yr Rainfall=4.41"20054_POST Printed 1/15/2021Prepared by Microsoft Page 4HydroCAD® 10.00-26 s/n 09853 © 2020 HydroCAD Software Solutions LLC Summary for Pond 11P: Design Point #2 Inflow Area = 1.298 ac, 3.31% Impervious, Inflow Depth = 1.14" for 25-yr event Inflow = 2.36 cfs @ 11.96 hrs, Volume= 0.124 af Primary = 2.36 cfs @ 11.96 hrs, Volume= 0.124 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind method, Time Span= 5.00-97.00 hrs, dt= 0.05 hrs