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Stormwater Report_1
APPENDIX 1 JARRETT Engineers, PLLC Civil Environmental Engineering Pre vs. Post Construction Stormwater Comparsion Project Name: A-1 Treeworks Date: 11/5/13 Client: A-1 Treeworks Project#JE: 13-053 I Pre/Post Overall Site Conditions I Pre-Construction 50 YR cfs 0.02 af 0.015 Post-Construction 50 YR cfs 0.01 af 0.007 I Pre-Construction Design Points Link: IL 2L 50 YR cfs 0.01 0.01 50 YR of 0.008 0.007 I Post-Construction Design Points Link: 3L 4L 50 YR cfs 0.00 0.01 50 YR af 0.00 0.007 12 East Washington Street 518-792-2907 Glens Falls, NY 12801 Fax 798-1864 APPENDIX 2 , JARRETT Engineers, PLLC Civil Environmental Engineering Stormwater Design Information Project Name: A-1 Treeworks Date: 11/5/13 Client: A-1 Treeworks Project#JE: 13-053 Water Quality Volume (WQv) Sub At Total Area(sf) Impervious Cover(sf) Rv calc Rv 0.2 min P WQv(cf) 3S 48657 25540 0.52 0.52 1.0 2118 0 1.0 0 1.0 0 1.0 0 1.0 0 1.0 0 1.0 0 1.0 0 1.0 0 1.0 0 1.0 0 1.0 0 1.0 0 1.0 0 1.0 0 1.0 0 1.0 0 1.0 0 1.0 0 1.0 0 1.0 0 1.0 0 1.0 0 1.0 0 1.0 0 Totals 48657 25540 2118 Pre-treatment Volume (By Practice) Runoff Reduction aeq��ed Technique ID Infiltration Required Q Pre-treatment Provided Pre-treatment device size(ct) Techniques(GIT)or Perc ID: b4'Q�' Pretreatmem rate 1 lilnli) dente size rut) SMP 3S Infiltration Basin 01 120 2 l 18 100% 2118 2133 0 0 0 0 12 East Washington Street 518-792-2907 Glens Falls, NY 12801 1 Fax 798-1864 APPENDIX 3 APPENDIX 4 APPENDIX 5 1S 2S 3S 4S i Pre-Dev lopment Pre-Development Post-Development Post-Development o 1111 111 1P Pre Treatrrient Trench Pre-Development Pre-Development �:,, . -Z 2P 5L Infiltration Basin u Pre-Development Sum 3L 4L Post-Develo ent Pot Development 6L Post-Development Sum / \ ---\.' .,Subcat, Reach •on• Link Routing Diagram for 13053 131104 Pre&Post / �� Prepared by Jarrett Engineers, PLLC HydroCAD®10.00 s/n 01268 ©2013 HydroCAD Software Solutions LLC 13053 131104 Pre 8s Post Prepared by Jarrett Engineers, PLLC HydroCADC 10.00 s/n 01268 ©2013 HydroCAD Software Solutions LLC Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 0.662 35 Brush, Fair, HSG A (1S, 3S, 4S) 0.586 98 Paved parking, HSG A (3S) 0.010 98 Roofs, HSG A (1S) 3.046 36 Woods, Fair, HSG A (1S, 2S, 3S, 4S) 4.305 44 TOTAL AREA Prepare d 13053 13110 by Ja4 Pre 8s Post Engineers, PLLC Type II 24-hr 50-Year Rainfall=4.80" rrett HydroCAD1 10.00 s/n 01268 ©2013 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Pre-Development Runoff = 0.01 cfs C 15.61 hrs, Volume= 0.008 af, Depth= 0.08" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 50-Year Rainfall=4.80" Area (sf) CN Description 37,446 36 Woods, Fair, HSG A 10,756 35 Brush, Fair, HSG A 455 98 Roofs, HSG A 48,657 36 Weighted Average 48,202 99.06% Pervious Area 455 0.94% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 24.3 100 0.0200 0.07 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 2.50" 8.6 364 0.0200 0.71 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 32.9 464 Total Subcatchment 1S: Pre-Development /� Hydrograph 0.011-! L Runoff 0.01' 0.01 cfs 00.009:009- Type 1 124-h r 0.008= - 50-Year Rainfall=4.80" 0.008 - - 0.007 - Runoff Area=48,657 sf 0.007= - 0.006= Runoff Volume=0.008 af 0006= 0.005-] Runoff Depth=0.08" 0 0005: Flow Length=464' V_ 0.004 °.00a= Slope=0.0200 '/' 0.003 0.003= Tc=32.9 min-- O.o02 0.002- C N=36 o.001 O.o01 0.000= o , 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) 13053 131104 Pre as Post Type 1124-hr 50-Year Rainfall=4.80" Prepared by Jarrett Engineers, PLLC HydroCAD® 10.00 s/n 01268 ©2013 HydroCAD Software Solutions LLC Summary for Subcatchment 2S: Pre-Development Runoff = 0.01 cfs @ 15.63 hrs, Volume= 0.007 af, Depth= 0.08" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 50-Year Rainfall=4.80" Area (sf) CN Description 45,102 36 Woods, Fair, HSG A 45,102 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 24.3 100 0.0200 0.07 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 2.50" 7.6 324 0.0200 0.71 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 31.9 424 Total Subcatchment 2S: Pre-Development Hydrograph 0.009= •Runoff 0.009-. 0.01 Cfs I Type II 24-h r 0.008 50-Year Rainfall=4.80" Runoff Area=45,102 sf 0.006= 0.006- Runoff Volume=0.007 af 005- Runoff Depth=0.08" 0.005- g 0.0043 Flow Length=424' 0.004 0.0032 L1 .9min e=0.0200 '/' 0003- 0.002 0.002= CN=36 0.001 0.000' j 0 .0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) 13053 131104 Pre & Post Type II 24-hr 50-Year Rainfall=4.80" Prepared by Jarrett Engineers, PLLC Hydro CAD ' 10.00 s/n 01268 ©2013 HvdroCAD Software Solutions LLC Summary for Subcatchment 3S: Post-Development Runoff = 3.29 cfs C 11.99 hrs, Volume= 0.162 af, Depth= 1.74" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 50-Year Rainfall=4.80" Area (sf) CN Description 5,453 36 Woods, Fair, HSG A 17,664 35 Brush, Fair, HSG A 25,540 98 Paved parking, HSG A 48,657 68 Weighted Average 23,117 47.51% Pervious Area 25,540 52.49% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.9 100 0.0500 0.24 Sheet Flow, Range n= 0.130 P2= 2.50" 0.4 75 0.0500 3.35 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 7.3 175 Total Subcatchment 3S: Post-Development / ! I Runoff' 3.29 cfs Type 1 124-h r 3 50-Year Rainfall=4.80" Runoff Area=48,657 sf Runoff Volume=0.162 af 2- Runoff Depth=1 .74" 0 _ Flow Length=175' Slope=0.0500 '/' 1 Tc=7.3 min CN=68 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) 13053 131104 Pre its Post Type 24-hr 50-Year Rainfall=4.80" Prepared by Jarrett Engineers, PLLC HydroCAD® 10.00 s/n 01268 ©2013 HydroCAD Software Solutions LLC Summary for Subcatchment 4S: Post-Development Runoff = 0.01 cfs @ 15.63 hrs, Volume= 0.007 af, Depth= 0.08" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 50-Year Rainfall=4.80" Area (sf) CN Description 44,674 36 Woods, Fair, HSG A 427 35 Brush, Fair, HSG A 45,101 36 Weighted Average 45,101 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 24.3 100 0.0200 0.07 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 2.50" 7.6 324 0.0200 0.71 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 31.9 424 Total Subcatchment 4S: Post-Development Hyrir.ogra,, / •Runoff 0.009= 0.01 Cf81 0:0081 / Type 1 124-h r 0006 50-Year Rainfall=4.80" 0.007= 0.007= Runoff Area=45,101 sf 0.006= 0.006= Runoff Volume=0.007 af 0005- Runoff Depth=0.08" 0.005-, 0 0.004: Flow Length=424' LL 0.004 0.003- Slope=0.0200 'I' Tc=31 .9 min 0.002 0.002 C N=36 0.001= 0.001 0.000= 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 26 30 32 34 36 38 40 42 44 46 48 Time (hours) 13053 131104 Pre as Post Type II 24-hr 50-Year Rainfall=4.80" Prepared by Jarrett Engineers, PLLC HydroCAD® 10.00 s/n 01268 ©2013 HvdroCAD Software Solutions LLC Summary for Pond 1P: Pre Treatment Trench Inflow Area = 1.117 ac, 52.49% Impervious, Inflow Depth = 1.74" for 50-Year event Inflow = 3.29 cfs@ 11.99 hrs, Volume= 0.162 af Outflow = 2.60 cfs @ 12.05 hrs, Volume= 0.125 af, Atten= 21%, Lag= 3.2 min Primary = 2.60 cfs @ 12.05 hrs, Volume= 0.125 af Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Peak Elev= 501.84'@ 12.05 hrs Surf.Area= 2,666 sf Storage= 1,965 cf Plug-Flow detention time= 142.3 min calculated for 0.125 af(77% of inflow) Center-of-Mass det. time=47.8 min ( 900.8 - 853.0 ) Volume Invert Avail.Storage Storage Description #1 500.00' 2,133 cf Custom Stage Data (Prismatic) Listed below(Recalc) 5,332 cf Overall x 40.0% Voids Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 500.00 2,666 0 0 502.00 2,666 5,332 5,332 Device Routing Invert Outlet Devices #1 Primary 501.50' 5.0' 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 Primary OutFlow Max=2.59 cfs@ 12.05 hrs HW=501.84' (Free Discharge) t1=Broad-Crested Rectangular Weir (Weir Controls 2.59 cfs @ 1.52 fps) 13053 131104 Pre as Post Type II 24-hr 50-Year Rainfall=4.80" Prepared by Jarrett Engineers, PLLC HvdroCAD® 10.00 s/n 01268 ©2013 HydroCAD Software Solutions LLC Pond 1P: Pre Treatment Trench Hydrograph ■Inflow 3.29 cfs ■Primary Inflow Area=1 .117 ac 3- Peak Elev=501 .84' 2.60 cfs Storage=1 ,965 cf u 2- 0 LL 1- 0 1 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) 13053 131104 Pre & Post Type R 24-hr 50-Year Rainfall=4.80" Prepared by Jarrett Engineers, PLLC HydroCAD® 10.00 s/n 01268 ©2013 HydroCAD Software Solutions LLC Summary for Pond 2P: Infiltration Basin Inflow Area = 1.117 ac, 52.49% Impervious, Inflow Depth = 1.34" for 50-Year event Inflow = 2.60 cfs @ 12.05 hrs, Volume= 0.125 af Outflow = 1.46 cfs @ 12.13 hrs, Volume= 0.125 af, Atten= 44%, Lag= 5.0 min Discarded = 1.46 cfs @ 12.13 hrs, Volume= 0.125 af Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Peak Elev= 500.20'@ 12.13 hrs Surf.Area= 524 sf Storage= 451 cf Plug-Flow detention time= 1.3 min calculated for 0.125 af(100% of inflow) Center-of-Mass det. time= 1.3 min ( 902.1 - 900.8 ) Volume Invert Avail.Storage Storage Description #1 499.00' 1,874 cf Custom Stage Data (Prismatic) Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 499.00 238 0 0 500.00 470 354 354 501.00 746 608 962 502.00 1,078 912 1,874 Device Routing Invert Outlet Devices #1 Discarded 499.00' 120.000 in/hr Exfiltration over Surface area Discarded OutFlow Max=1.46 cfs@ 12.13 hrs HW=500.20' (Free Discharge) L1=Exfiltration (Exfiltration Controls 1.46 cfs) 13053 131104 Pre & Post Type 1124-hr 50-Year Rainfall=4.80" Prepared by Jarrett Engineers, PLLC HydroCAD® 10.00 s/n 01268 ©2013 HydroCAD Software Solutions LLC Pond 2P: Infiltration Basin Hydrograph •Inflow II 2.60 cfs •Discarded Inflow Area=1 .117 ac Peak EIev=500.20' 2 Storage=451 cf 1.46 cfs O LL 1 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) 13053 1,31104 Pre 8s Post Type II 24-hr 50-Year Rainfall=4.80" Prepared by Jarrett Engineers, PLLC HydroCAD® 10.00 s/n 01268 ©2013 HydroCAD Software Solutions LLC Summary for Link 1L: Pre-Development Inflow Area = 1.117 ac, 0.94% Impervious, Inflow Depth = 0.08" for 50-Year event Inflow = 0.01 cfs @ 15.61 hrs, Volume= 0.008 af Primary = 0.01 cfs @ 15.61 hrs, Volume= 0.008 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Link 1L: Pre-Development Hydrograph ■Inflow 0.011, I n (11 ■Primary 001- I 0.01 cfs 0.009 Inflow Area=1.117 ac 0.009= 0.008 0.008 0.007= 0.007= 0.006- w 0.006= 0.005 0 0.005- LL 0.004- 0.0043 0.003= 0.003= 0.002= 0.002= 0.001 0.001; 0.000' 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) 13053 131104 Pre 8s Post Type II 24-hr 50-Year Rainfall=4.80" Prepared by Jarrett Engineers, PLLC HydroCAD® 10.00 s/n 01268 ©2013 HydroCAD Software Solutions LLC Summary for Link 2L: Pre-Development Inflow Area = 1.035 ac, 0.00% Impervious, Inflow Depth = 0.08" for 50-Year event Inflow = 0.01 cfs @ 15.63 hrs, Volume= 0.007 of Primary = 0.01 cfs @ 15.63 hrs, Volume= 0.007 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Link 2L: Pre-Development / Hydrograph Inflow 0.009-7 1 n n� ■■Primary 0.009. 0.01 cfs Inflow Area=1.035 ac 0.008= 0.008 0.007= 0.007- 0.006= 0.0061- r, 0.005- U 0.005= _0 0.004= LL 0.004 0.003 0.003-- 0.002= 0.002 0.001 0.001 0.000 0 .. 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) • 13053 131104 Pre & Post Type II 24-hr 50-Year Rainfall=4.80" Prepared by Jarrett Engineers, PLLC HydroCAD® 10.00 s/n 01268 ©2013 HydroCAD Software Solutions LLC Summary for Link 3L: Post-Development Inflow Area = 1.117 ac, 52.49% Impervious, Inflow Depth = 0.00" for 50-Year event Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of Primary outflow = Inflow, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Link 3L: Post-Development Hydrograph 1 •Primary Inflow Area=1 .117 ac 3 O 0.00 cfs 0 .......................... 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) 13053 131104 Pre as Post Type II 24-hr 50-Year Rainfall=4.80" Prepared by Jarrett Engineers, PLLC HydroCAD® 10.00 s/n 01268 ©2013 HydroCAD Software Solutions LLC Summary for Link 4L: Post-Development Inflow Area = 1.035 ac, 0.00% Impervious, Inflow Depth = 0.08" for 50-Year event Inflow = 0.01 cfs@ 15.63 hrs, Volume= 0.007 af Primary = 0.01 cfs @ 15.63 hrs, Volume= 0.007 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Link 4L: Post-Development Hydrograph l u Inflow n n� ■Primary 1 o.00s= 0.01 cfs 0.009-] Inflow Area=1.035 ac 0.008= 0.008- 0.007- 0.007. 0.006 0.006 .1 0.005 0.005- 0 0.004 LL 0.004- 0.003 0.003= 0.002 0.002- 0.001-: 0.001 0.000. 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) • 13053 131104 Pre es Post Type II 24-hr 50-Year Rainfall=4.80" Prepared by Jarrett Engineers, PLLC HydroCAD® 10.00 s/n 01268 ©2013 HydroCAD Software Solutions LLC Summary for Link 5L: Pre-Development Sum Inflow Area = 2.152 ac, 0.49%Impervious, Inflow Depth = 0.08" for 50-Year event Inflow = 0.02 cfs @ 15.62 hrs, Volume= 0.015 af Primary = 0.02 cfs @ 15.62 hrs, Volume= 0.015 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Link 5L: Pre-Development Sum Hydrograph / ■Inflow ` 000.012 1 n n7 ■Primary 0.02 cfs Inflow Area=2.152 ac 0.016= 0.017-e 0.016= 0.015 0.014= 0.013 0.012 .5 0.011 0.01 ti 0.009 0.008 0.007 0.006 0.005 0.004 0.003= 0.002= 0.001 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) • 13053 131104 Pre & Post Type II 24-hr 50-Year Rainfall=4.80" Prepared by Jarrett Engineers, PLLC HydroCAD® 10.00 s/n 01268 ©2013 HydroCAD Software Solutions LLC Summary for Link 6L: Post-Development Sum Inflow Area = 2.152 ac, 27.24% Impervious, Inflow Depth = 0.04" for 50-Year event Inflow = 0.01 cfs @ 15.63 hrs, Volume= 0.007 af Primary = 0.01 cfs @ 15.63 hrs, Volume= 0.007 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Link 6L: Post-Development Sum Hydrograph / ■Inflow 0 01 ■Primary 0009= 0.01 CfS Inflow Area=2.152 ac o.00s= 0.008- 0.008-i - 0.007 0.007- 0.006= 0.006 ,g 0.005 0.005- 0 0.004 LL 0.004= 0.003 0.003= 0.002- 0.002 0.001 0.001. 0.000- 0 0 2 4 6 8 10 12 14 16 18 20 lime(ho 6 28 30 32 34 36 38 40 42 44 46 48