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HomeMy WebLinkAboutStormwater Mgmt & LDP Application Enging Report STORMWATER MANAGEMENT AND LAND DISTURBANCE APPLICATION ENGINEERING REPORT for LOTS 1-3 SALEM STREET NORTH AND OVER, MASSACHUSETTS Prepared for.- Livingstone Development P.O. Box 50 Tewksbury, MA 01876 Date: April 10, 2017 Prepared by: CHRISTIANSEN & SERGI, INC. PROFESSIONAL ENGINEERS AND LAND SURVEYORS CS1 160 SUMMER STREET,HAVERHILL,MA 01830 tel:978-373-0310 \r"w.csi-engrcom fax 978-372-3960 �,. k,r, Uvc-Instruction Sequence 1975 Salem Street Construction Sequence Salem Street Lots 1. Stakeout sedimentation control 2. Stakeout limit of work 3. Install sedimentation control 4. Cut trees. Leave stumps in place. 5. Install construction entrance 6. Grub driveway areas 7. Strip loam and subsoil from driveway areas and adjoining slopes. 8. Excavate to subgrade for driveway construction 9. Loam and seed disturbed areas and shoulders 10. Stabilize sloped areas 11. Install driveway gravel base 12. Pave binder course 13. As individual lots are to be developed the work area should be grubbed 14. Loam and subsoil removed as necessary for the septic system house and well construction 15. Upon completion of construction work loam and seed all disturbed areas 16. Upon completion of all work on the lots remove the construction entrance 17. Pave the top course of asphalt. Hydrologic Analysis TABLE: SUMMARY OF HYDROLOGIC ANALYSIS, CFS SALEM STREET 2 YEAR 10 YEAR 25 YEAR 100 YEAR EXISTING .15 1.02 1.93 4.30 PROPOSED .13 0.70 1.25 3.70 NE 2 YEAR 10 YEAR 25 YEAR 100 YEAR EXISTING .28 2.02 3.89 8.83 PROPOSED .30 1.60 2.90 6.23 SE 2 YEAR 10 YEAR 25 YEAR 100 YEAR EXISTING .06 .43 .81 1.77 PROPOSED .03 .18 .33 1.45 NW 2 YEAR 10 YEAR 25 YEAR 100 YEAR EXISTING .22 1.51 2.85 6.37 PROPOSED .22 1.17 2.11 4.53 INTERNAL 2 YEAR 10 YEAR 25 YEAR 100 YEAR EXISTING .05 .33 .62 1.38 PROPOSED .12 .46 .78 1.58 The increased flow volume in area P-5 (internal) can be stored within the confines of the depression that defines the area.The volume of runoff from the 100 yr. storm is 3049 cubic feet.The volume of storage available from contour 134 to contour 138 is 8768 cubic feet. Since the storage volume exceeds the runoff volume the water will remain in the depression and not overflow from the property. Cp `P-1B21 A- EX Salem st DRItOTI PROPO ED p, posed prop sad djd 7L <I----- � R] CHAMBERS prop Salem St (new Reach) rP-2A��P�K/ CP-2�6 EX NE (new lubcat) PRO"- ED PROPDSED is 1OR CUVERT ,_!XF,lt.�\ Z-- CHAMBERS prop ne OP-3 3A �\A-3� PRoPbSED LOT3bRlVE EX se P\ P prop se CHAMBERS \�A4 CP-4) EXnw prop nw A-5 P-5 internal internal �Subcat a 7ReaChj ;on�d Drainage Diagram for SALEM ST LinkI re ared by{enter your company name here}, Printed 4/10/2017 L-------- -7 Prepared CAD®9.00 s/n 01057 @ 2009 HydroCAD Software Solutions LLC SALEM ST Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC page 2 Pipe Listing (all nodes) Line# Node In-Invert Out-Invert Length Slope n Diam/Width Height Number (feet) (feet) (feet) (ft/ft) (inches) (inches) 1 10R 117.50 117.00 73.0 0.0068 0.009 36.0 12.0 SALEM ST Type // 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 3 Time span=1.00-20.00 hrs, dt=0.05 hrs, 381 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method SubcatchmentA-1: EX salem st Runoff Area=37,454 sf 0.00% Impervious Runoff Depth>0.21" Flow Length=267' Tc=9.0 min CN=55 Runoff=0.15 cfs 0.015 of SubcatchmentA-2: EX NE Runoff Area=92,701 sf 0.00% Impervious Runoff Depth>0.21" Flow Length=540' Slope=0.0644'/' Tc=14.1 min CN=55 Runoff=0.28 cfs 0.036 of SubcatchmentA-3: EX se Runoff Area=14,047 sf 0.00% Impervious Runoff Depth>0.21" Flow Length=172' Slope=0.1511 T Tc=6.5 min CN=55 Runoff=0.06 cfs 0.006 of SubcatchmentA-4: EX nw Runoff Area=56,994 sf 0.00% Impervious Runoff Depth>0.21" Flow Length=272' Slope=0.0808 '/' Tc=9.6 min CN=55 Runoff=0.22 cfs 0.022 of SubcatchmentA-5: internal Runoff Area=11,128 sf 0.00% Impervious Runoff Depth>0.21" Flow Length=166' Slope=0.1206 '/' Tc=7.1 min CN=55 Runoff=0.05 cfs 0.004 of SubcatchmentP-1A: PROPOSED Runoff Area=4,166 sf 0.00% Impervious Runoff Depth>0.29" Flow Length=150' Tc=6.3 min CN=58 Runoff=0.04 cfs 0.002 of SubcatchmentP-1 B1: proposed Runoff Area=16,710 sf 0.00% Impervious Runoff Depth>0.25" Flow Length=230' Tc=8.5 min CN=57 Runoff=0.10 cfs 0.008 of SubcatchmentP-11132: proposed Runoff Area=14,384 sf 0.00% Impervious Runoff Depth>0.25" Flow Length=71' Slope=0.1400 T Tc=7.5 min CN=57 Runoff=0.09 cfs 0.007 of SubcatchmentP-1C: DRIVELOTI Runoff Area=8,714 sf 32.64% Impervious Runoff Depth>0.89" Flow Length=50' Slope=0.3300'/' Tc=0.4 min CN=73 Runoff=0.40 cfs 0.015 of SubcatchmentP-2A: PROPOSED Runoff Area=12,162 sf 0.00% Impervious Runoff Depth>0.26" Flow Length=130' Slope=0.1090'/' Tc=7.0 min CN=57 Runoff=0.08 cfs 0.006 of SubcatchmentP-2B: PROPOSED Runoff Area=46,507 sf 0.00% Impervious Runoff Depth>0.28" Flow Length=423' Tc=13.2 min CN=58 Runoff=0.27 cfs 0.025 of SubcatchmentP-2C: (new Subcat) Runoff Area=29,848 sf 22.22% Impervious Runoff Depth>0.70" Flow Length=397' Tc=11.6 min CN=69 Runoff=0.72 cfs 0.040 of SubcatchmentP-3: PROPOSED Runoff Area=6,115 sf 0.00% Impervious Runoff Depth>0.21" Flow Length=250' Slope=0.1200'/' Tc=7.9 min CN=55 Runoff=0.03 cfs 0.002 of SubcatchmentP-4: prop nw Runoff Area=39,341 sf 0.00% Impervious Runoff Depth>0.26" Flow Length=351' Slope=0.0764'/' Tc=10.8 min CN=57 Runoff=0.22 cfs 0.019 of SubcatchmentP-5: internal Runoff Area=10,767 sf 0.00% Impervious Runoff Depth>0.33" Flow Length=116' Slope=0.1206 '/' Tc=6.6 min CN=59 Runoff=0.12 cfs 0.007 of SubcatchmentP3A: LOT3DRIVE Runoff Area=3,045 sf 100.00% Impervious Runoff Depth>2.82" Flow Length=100' Slope=0.1500 '/' Tc=0.5 min CN=98 Runoff=0.36 cfs 0.016 of SALEM ST Type/1 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 4 Reach 8R: (new Reach) Avg. Depth=0.00' Max Vet=0.00 fps Inflow=0.00 cfs 0.000 of n=0.022 L=100.0' S=0.1700 '/' Capacity=13.88 cfs Outflow=0.00 cfs 0.000 of Reach 1 OR: CUVERT Avg. Depth=0.05' Max Vet=1.80 fps Inflow=0.27 cfs 0.025 of 36.0"x 12.0" Box Pipe n=0.009 L=73.0' S=0.0068 '/' Capacity=21.32 cfs Outflow=0.26 cfs 0.025 of Pond 2P: prop se Inflow=0.03 cfs 0.002 of Primary=0.03 cfs 0.002 of Pond 3P: CHAMBERS Peak EIev=101.36' Storage=0.006 of Inflow=0.36 cfs 0.016 of Discarded=0.05 cfs 0.016 of Primary=0.00 cfs 0.000 of Outflow=0.05 cfs 0.016 of Pond 9P: CHAMBERS Peak EIev=101.08' Storage=0.005 of Inflow=0.40 cfs 0.015 of Discarded=0.05 cfs 0.015 of Primary=0.00 cfs 0.000 of Outflow=0.05 cfs 0.015 of Pond EXFIL: CHAMBERS Peak EIev=100.90' Storage=503 cf Inflow=0.72 cfs 0.040 of Discarded=0.15 cfs 0.040 of Primary=0.00 cfs 0.000 of Outflow=0.15 cfs 0.040 of Pond OUTFLOW:prop ne Inflow=0.30 cfs 0.031 of Primary=0.30 cfs 0.031 of Pond POND: dpond Peak EIev=118.52' Storage=12 cf Inflow=0.09 cfs 0.007 of Discarded=0.07 cfs 0.007 of Primary=0.00 cfs 0.000 of Outflow=0.07 cfs 0.007 of Link 7L: prop salem st Inflow=0.13 cfs 0.010 of Primary=0.13 cfs 0.010 of Total Runoff Area= 9.276 ac Runoff Volume = 0.231 of Average Runoff Depth = 0.30" 96.90% Pervious = 8.989 ac 3.10% Impervious = 0.287 ac SALEM ST Type 1124-hr 2YR Rainfall=3.20" Prepared by {enter your company name here) Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 5 Summary for Subcatchment -1: EX salem st Runoff = 0.15 cfs @ 12.06 hrs, Volume= 0.015 af, Depth> 0.21" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 2YR Rainfall=3.20" Area (sf) CN Description 37,454 55 Woods, Good HSG B 37,454 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.5 50 0.1000 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 2.5 217 0.0830 1.44 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 9.0 267 Total Subcatchment A-1: EX Salem st Hydrograph 0.16-: 015 cfs Runoff Type II 24-hr 2YR 0.14- Rainfall=3.20" 0.12- Runoff Area=37,454 sf Runoff Volume=0.015 of 0.1 _ Runoff Depth>0.21" 3 0.08 Flow Length=267' ° Tc=9.0 min 0.06 CN=55 0.04- 0.02 0 1 2 3 4 5 6 7 8 9 10 1 1 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type/1 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 6 Summary for Subcatchment A-2: EX N Runoff = 0.28 cfs @ 12.14 hrs, Volume= 0.036 af, Depth> 0.21" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 2YR Rainfall=3.20" Area (sf) CN Description 92,701 55 Woods, Good, HSG B 92,701 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.7 50 0.0644 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 6.4 490 0.0644 1.27 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 14.1 540 Total Subcatchment A-2: EX NE Hydrograph 0.3.= 0.28 cfs Runoff 0.28 - - Type 11 24-hr 2YR 0.26 Rainfall=3.20'�' 0.24 0.22_- Runoff Area=92,701 sf 0.2 Runoff Volume=0.036 of 0.18 Runoff Depth>0.21 0.16= Flow Length=5 0' 0 0.14 a: 0.12 n Slope=0.064 '/' 0.1 :ti TC=14.1 min 0.08 = CN=55 0.06-w' 0.04-= 0.02v: 0 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type // 24-hr 2YR Rainfall=3.20" Prepared by (enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment -3: EX se Runoff = 0.06 cfs @ 12.03 hrs, Volume= 0.006 af, Depth> 0.21" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 2YR Rainfall=3.20" Area (sf) CN Description 14,047 55 Woods, Good HSG B 14,047 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.5 50 0.1511 0.15 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 1.0 122 0.1511 1.94 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 6.5 172 Total Subcatchment A-3: EX se Hydrograph - 0.06 cfs 0.065 Runoff 0.06-- Type II 24-hr 2YR " 0.055 Rainfall=3.20 0.05 Runoff Area=14,047 sf 0.045_ Runoff Volume=0.006 of v 0.04- Runoff Depth>0.21" 0.035= Flow Length=172' 2 0.03 - Slope=0.1511 - `- 0.025~ _Tc=6.5 min 0.02 CN=55 0.015 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type/1 24-hr 2YR Rainfall=3.20" Prepared by (enter your company name here) Printed 4/10/2017 HydroCADO 9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 8 Summary for Subcatchment -4: EX nw Runoff = 0.22 cfs @ 12.07 hrs, Volume= 0.022 af, Depth> 0.21" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 2YR Rainfall=3.20" Area (sf) CN Description 56,994 55 Woods, Good, HSG B 56,994 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.0 50 0.0808 0.12 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 2.6 222 0.0808 1.42 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 9.6 272 Total Subcatchment A-4: EX nw Hydrograph 0.24- ` 0.22 Cfs Runoff 0.22= Type II 24-hr 2Y 0.2 Rainfall=3:20" 0.18= Runoff Are a=56,994 sf 0.16-- Runoff Volume=0.022 of 0.14= Runoff Depth>0.21°° 0.12 Flow Length=�272' 0.1 Slope=0.0808 0.08 Tc=9.6 min 0.06-:: C' =55 0.04- 0.02 n 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type/1 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 9 Summary for Subcatchment A-5: internal Runoff = 0.05 cfs @ 12.04 hrs, Volume= 0.004 af, Depth> 0.21" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 2YR Rainfall=3.20" Area (sf) CN Description 11,128 55 Woods, Good, HSG B 11,128 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 50 0.1206 0.14 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 1.1 116 0.1206 1.74 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 7.1 166 Total Subcatchment A-5: internal Hydro graph 0.05 CFS El Runoff 0.05= " I Type II 2 -hr 2YR 0.045 Rainfall=3.20" 0.04- Runoff Area=11128 sf 0.035 Runoff Volume=0.004 of v 0.03- Runoff Depth>0.21" 0 0.025- Flow Length=166' — Slope=0.1206 '/' 0.02 Tc=7.1 min 0.015 : CN=55 0.01-_ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type 11 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here) Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 10 Summary for Subcatchment P-1A: PROPOSED Runoff = 0.04 cfs @ 12.01 hrs, Volume= 0.002 af, Depth> 0.29" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 2YR Rainfall=3.20" Area (sf) CN Description 2,208 61 >75% Grass cover, Good, HSG B 1,958 55 Woods, Good, HSG B 4,166 58 Weighted Average 4,166 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 4.3 50 0.0400 0.20 Sheet Flow, Grass: Short n= 0.150 P2= 3.22" 2.0 100 0.0140 0.83 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 6.3 150 Total Subcatchment P-1A: PROPOSED Hydrograph 0.04 cfs Runoff 0.04 Type 11 24-hr 2YR 0.035 _ Rainfall=3.20" 0.03 Runoff Area=4,1'66 sf Runoff_Volume=0.002 af r 0.025-' Runoff Depth>0.29" Tco ength=150' 0 0.02-_ =6.3 min 0.015r' CAN=58 s 0.01 0.005 . 0 1 2 3 4 5 6 7 8 9 10 11 1213141516 17 18 19 20 Time (hours) SALEM ST Type/1 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 11 Summary for Subcatchment P-1 131: proposed Runoff = 0.10 cfs @ 12.05 hrs, Volume= 0.008 af, Depth> 0.25" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 2YR Rainfall=3.20" Area (sf) CN Description 11,854 55 Woods, Good, HSG B 4,856 61 >75% Grass cover, Good, HSG B 16,710 57 Weighted Average 16,710 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.5 50 0.1000 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 0.9 52 0.0400 1.00 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 1.2 128 0.1250 1.77 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 8.5 230 Total Subcatchment P-1 B1: proposed Hydrograph 0.11-y ) 0.10 CfS Runoff 0.1.W Type II 24-hr 2YR . 0.09- Rainfall=3.20" 0.08 Runoff Area=16,710 sf Runoff Volume=0.008 of " 0.06 Runoff Depth>0.25" 0. 7 Flow Length=230 0 0.05_ Tc=8.5 min LL 0.04 CN=57 0.03 w 0.02v_ 0.01 w 0- 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type/1 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here) Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 12 Summary for Subcatchment -1 B2: proposed Runoff = 0.09 cfs @ 12.03 hrs, Volume= 0.007 af, Depth> 0.25" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 2YR Rainfall=3.20" Area (sf) CN Description 10,623 55 Woods, Good, HSG B 3,761 61 >75% Grass cover, Good, HSG B 14,384 57 Weighted Average 14,384 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (fUsec) (cfs) 7.5 71 0.1400 0.16 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" Subcatchment P-1 B2: proposed Hydrograph W 0.09 Cfs Runoff 0.09 Type II 24-hr 2YR 0.08 Rainfall=3.20" 0.07- Runoff Area=14 384 sf Runoff Volume=0.007 of 0 06= Runoff.Depth>0.25" 3 0.05- Flow Length=71' ,° 0.04 : Slope=0.1400 0.03- Tc=7.5 min C'N=57 0.02- 0.01 W ` 0 , 1 2 3 4 5 6 7 8 9 1011 121314151617181920 Time (hours) SALEM ST Type 11 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 13 Summary for Subcatchment P-1C: DRIVELOT1 Runoff = 0.40 cfs @ 11.90 hrs, Volume= 0.015 af, Depth> 0.89" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 2YR Rainfall=3.20" Area (sf) CN Description 2,844 98 Paved parking, HSG B 5,870 61 >75% Grass cover, Good, HSG B 8,714 73 Weighted Average 5,870 67.36% Pervious Area 2,844 32.64% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.4 50 0.3300 2.12 Sheet Flow, n= 0.022 P2= 3.22" Subcatchment P-1 C: DRIVELOT1 Hydro graph 0.45... l 0.40 CfS Runoff 0.4-- Type II 24-hr 2YR 0.357 Rainfall=3.20" Runoff Area=8,714 sf � 0.3' Runoff Volume=0.015 of 0.25-- Runoff Depth>0.89" Flow Length=50" 0 0.2 - Slope=0.3300 '/' 0.15- Tc=0.4 min 0.1 - CN=73 0.05 0 -,u. ��. . 77 1 2 3 4 5 6 7 8 910 1112 1314151617 181920 Time (hours) SALEM ST Type/1 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 14 Summary for Subcatchment P-2A: PROPOSED Runoff = 0.08 cfs @ 12.02 hrs, Volume= 0.006 af, Depth> 0.26" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 2YR Rainfall=3.20" Area (sf) CN Description 3,787 61 >75% Grass cover, Good, HSG B 8,375 55 Woods, Good, HSG B 12,162 57 Weighted Average 12,162 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.2 50 0.1090 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 0.8 80 0.1090 1.65 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 7.0 130 Total Subcatchment P-2A: PROPOSED Hydrograph 0.09 j TO.08 CfS Runoff 0.08 Type 11 24-hr 2YR Rainfall=320" 0.07 Runoff Area=12162 sf 0.06-K. Runoff Volume=0.006'af 0.05-- Runoff'Depth>026" Flow Length=13,0' �n 0 0.04=` Slope=0.1090 'I' 0.03 Tc=7.0 min C'N=57 0.02 0.01 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type // 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here) Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 15 Summary for Subcatchment P-2 : PROPOSED Runoff = 0.27 cfs @ 12.10 hrs, Volume= 0.025 af, Depth> 0.28" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 2YR Rainfall=3.20" Area (sf) CN Description 25,775 55 Woods, Good, HSG B 20,732 61 >75% Grass cover, Good, HSG B _ 46,507 58 Weighted Average 46,507 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.9 50 0.0600 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 0.9 109 0.1800 2.12 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 2.6 134 0.0150 0.86 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 1.8 130 0.0300 1.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 13.2 423 Total Subcatchment P-2B: PROPOSED Hydrograph _ Runoff 0.28- 027 CfS 0.26 - Type II 24-hr 2YR . 0.24- Rainfal1=3.20" _ 0.22 _ Runoff Area=46,507 f - 0.2= -Runoff Volume=0.025 of - N 0.18 0.16.. Runoff Depth>0.28" 0 0.14- Flow Length=423' .2 0.12� Tc=13.2 min 0.1 ` CN=58 0.08 ,r 0.06 _ - 0.04 ; 0.02 0- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type/1 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here) Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 16 Summary for Subcatchment P-2C: (new Subcat) Runoff = 0.72 cfs @ 12.05 hrs, Volume= 0.040 af, Depth> 0.70" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 2YR Rainfall=3.20" Area (sf) CN Description 23,215 61 >75% Grass cover, Good, HSG B 6,633 98 Paved parking, HSG B 29,848 . 69 Weighted Average 23,215 77.78% Pervious Area 6,633 22.22% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) Oft) (ft/sec) (cfs) 7.4 50 0.0100 0.11 Sheet Flow, Grass: Short n= 0.150 P2= 3.22" 2.8 137 0.0140 0.83 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 1.4 210 0.1200 2.42 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 11.6 397 Total Subcatchment P-2C: (new Subcat) Hydro graph 0.8_ 0.72 CfS' Runoff 0.7 Type II 24-hr 2YR - Rainfall=3.20'�' - 0.6 Runoff Area=29,848 Sf Runoff Volume=0.040 v th 0.5 off'De >0.70 of - p _ v� 3 0.4 Flow Length=397' ° Tc=11.6 min 0.3 C'N=69 0 2-- 0.1 0 jF. Ffl . 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type 1124-hr 2YR Rainfall=3.20" Prepared by{enter your company name here} Printed 4/10/2017 HydroCAD09 00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 17 Summary for Subcatchment P-3: PROPOSED Runoff = 0.03 cfs @ 12.05 hrs, Volume= 0.002 af, Depth> 0.21" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 2YR Rainfall=3.20" Area (sf) CN Description 6,115 55 Woods, Good, HSG B 6,115 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 50 0.1200 0.14 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 1.9 200 0.1200 1.73 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 7.9 250 Total Subcatchment P-3: PROPOSED Hydrograph 0.028_ 0.03 cfs Runoff 0.026_ Type 11 24-hr 2YR 0.024 Rainfall=3.20" 0.022 Runoff Area=69115 sf 0.02- 0.018 Runoff'Volume'0.002 of 0.016- Runoff Dpth>0.21 0.014 Flow Length=250' LL 0.012-- Slope=0.1200_'1' 0.01= TC=7.9 min 0.008 CN=55 0.006 _ 0.004 0.002= 0 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type 11 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 18 Summary for Subcatchment P-4: prop nw Runoff = 0.22 cfs @ 12.07 hrs, Volume= 0.019 af, Depth> 0.26" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type 11 24-hr 2YR Rainfall=3.20" Area (sf) CN Description 12,424 61 >75% Grass cover, Good, HSG B 26,917 55 Woods, Good, HSG B 39,341 57 Weighted Average 39,341 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (fUsec) (cfs) 7.2 50 0.0764 0.12 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 3.6 301 0.0764 1.38 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 10.8 351 Total Subcatchment P-4: prop nw Hydro graph 0.24- 0.22 CfS Runoff 0.22 Type 11 24-hr_2YR_ 0.2 Rainfall=12W' 0.18= Runoff Area=39,341 sf. 0.16 um - Runoff Uol - e=0.019 of 0.14 Runoff De th>0.26" 0.12- Flow Length=351' 0.1 Slo 0 0764 / o pa=_ , u. 0.08- T&10.8 min GN=57 , 0.06 - 0.04-4 0.02- 0 : . 1 2 3 4 5 6 7 8 9 10 11 12 1�3 14 15 16 17 18 19 20 Time (hours) SALEM ST Type/1 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 19 Summary for Subcatchment P-5: internal Runoff = 0.12 cfs @ 12.01 hrs, Volume= 0.007 af, Depth> 0.33" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 2YR Rainfall=3.20" Area (sf) CN Description 8,014 61 >75% Grass cover, Good, HSG B 2,753 55 Woods Good, HSG B 10,767 59 Weighted Average 10,767 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 50 0.1206 0.14 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 0.6 66 0.1206 1.74 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 6.6 116 Total Subcatchment P-5: internal yoah 0.13 0.12 cfs Runoff 0.12 Type 11 24-hr 2YR 0.11= Rainfall=320" 0.1 Runoff Area=10,767 sf - 0.09 Runoff Volume=0.007 of - 0.08- Runoff Depth>0.33" - 0.07- Flow Length=116' M _0 0.06- Slo e-0 1206 / U. - Tc=66 min - 0.04- GN=59 0.03 v 0.02. z- 0.01 ° - 0� oga 1 2 3 4 5 6 7 8 9 1011 121314151617181920 Time (hours) SALEM ST Type // 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 20 Summary for Subcatchment P3A: LOT3DRIVE Runoff = 0.36 cfs @ 11.89 hrs, Volume= 0.016 af, Depth> 2.82" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 2YR Rainfall=3.20" Area (sf) CN Description 3,045 98 Paved parking, HSG B 3,045 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.5 100 0.1500 3.09 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.22" Subcatchment P3A: LOT3DRIVE Hydro graph 0.36 USRunoff 0.35-- Type II 24-hr 2YR Rainfall=3:207 - 0.3- Runoff Area=3,045 sf 0.25- of Runoff'Volume=0.016 � - Runoff De th>2.82" 3 0.2 Flow Length=100 o _ Slope=0.1500_y. u- 0.15- Tc=0.5 min 0.1 _ CN=98 0.05 0- 1 2 3 4 5 6 7 8 9 1011 12 1314151617181920 Time (hours) SALEM ST Type 11 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 21 Summary for Reach 8R: (new Reach) Inflow Area = 0.330 ac, 0.00% Impervious, Inflow Depth = 0.00" for 2YR event Inflow = 0.00 cfs @ 1.00 hrs, Volume= 0.000 of Outflow = 0.00 cfs @ 1.00 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 0.00 fps, Min. Travel Time= 0.0 min Avg. Velocity = 0.00 fps, Avg. Travel Time= 0.0 min Peak Storage= 0 cf @ 1.00 hrs, Average Depth at Peak Storage= 0.00' Bank-Full Depth= 0.60', Capacity at Bank-Full= 13.88 cfs 2.50' x 0.60' deep Parabolic Channel, n= 0.022 Length= 100.0' Slope= 0.1700 '/' Inlet Invert= 119.00', Outlet Invert= 102.00' Reach 8R: (new Reach) Hydrograph Inflow 1_ Outflow Inflow rea=0.330 ac Avg. Depth=0.00' Max Vet=0 00 fps N n=0.022 L=100.0' o =0.1700 T apacity=1388 cfs 0.00 cfs r 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type/1 24-hr 2YR Rainfall=3.20" Prepared by{enter your company name here} Printed 4/10/2017 FydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 22 Summary for Reach 10 : CUVERT Inflow Area = 1.068 ac, 0.00% Impervious, Inflow Depth > 0.28" for 2YR event Inflow = 0.27 cfs @ 12.10 hrs, Volume= 0.025 of Outflow = 0.26 cfs @ 12.12 hrs, Volume= 0.025 af, Atten= 2%, Lag= 1.1 min Routing by Stor-Ind+Trans method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 1.80 fps, Min. Travel Time= 0.7 min Avg. Velocity = 0.79 fps, Avg. Travel Time= 1.5 min Peak Storage= 11 cf @ 12.11 hrs, Average Depth at Peak Storage= 0.05' Bank-Full Depth= 1.00', Capacity at Bank-Full= 21.32 cfs 36.0"W x 12.0" H Box Pipe n= 0.009 Length= 73.0' Slope= 0.0068 T Inlet Invert= 117.50', Outlet Invert= 117.00' Reach 10R: CUVERT Hydro graph 0 97 t4 IM Inflow Inflow Area=1.068 a 0 26 Cfs Outflow 0.25- Avg. Depth=0.05' MaxVel=1.80 fps 0.2- 36.0" x 12.0 Box Pipe - 0.15-' n=0.009 o L'=73.0' 0.1 S=0.0068 '/' v_ Capacity=2132 cfs 0.05- 0-. a .. 1 2 3 4 5 6 7 8 9 1011 121314151617181920 Time (hours) SALEM ST Type/1 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 23 Summary for Pond 2P: prop se Inflow Area = 0.210 ac, 33.24% Impervious, Inflow Depth > 0.14" for 2YR event Inflow = 0.03 cfs @ 12.05 hrs, Volume= 0.002 of Primary = 0.03 cfs @ 12.05 hrs, Volume= 0.002 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Pond 2P: prop se Hydro graph m Inflow 0.028 Inflo rea-0.210 0.03 CfS Primary 0.026 0.024 0.022 0.02- - y 0.018- 0.016 0.014 IT --0 0.012 - 0.01 _ 0.008 0.006 0.004� 0.002- O'— oaa$ aaa s�oi . �o aeo6 ae g<ez aq g .aka .,3R a 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 1920 Time (hours) SALEM ST Type 11 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCADO 9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 24 Summary for Pond 3P: CHAMBERS Inflow Area = 0.070 ac,100.00% Impervious, Inflow Depth > 2.82" for 2YR event Inflow = 0.36 cfs @ 11.89 hrs, Volume= 0.016 of Outflow = 0.05 cfs @ 12.07 hrs, Volume= 0.016 af, Atten= 87%, Lag= 10.4 min Discarded = 0.05 cfs @ 12.07 hrs, Volume= 0.016 of Primary = 0.00 cfs @ 1.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 101.36' @ 12.07 hrs Surf.Area= 0.011 ac Storage= 0.006 of Plug-Flow detention time= 36.0 min calculated for 0.016 of(100% of inflow) Center-of-Mass det. time= 35.7 min ( 752.3 - 716.6 ) Volume Invert Avail.Storage Storage Description #1 A 100.00, 0.012 of 3.83'W x 72.20'L x 2.83'H Field A Z=1.0 0.033 of Overall - 0.003 of Embedded = 0.029 of x 40.0%Voids #2A 101.00, 0.003 of StormTech SC-310 x 10 Inside#1 Effective Size= 28.9"W x 16.0"H => 2.07 sf x 7.121 = 14.7 cf Overall Size= 34.0"W x 16.0"H x 7.56'L with 0.44' Overlap 0.015 of Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Discarded 100.00' 4.000 in/hr Exfiltration over Surface area #2 Primary 102.83' 6.0" Horiz. Orifice/Grate X 10.00 C= 0.600 Limited to weir flow at low heads Qiscarded OutFlow Max=0.05 cfs @ 12.07 hrs HW=101.36' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.05 cfs) Primary OutFlow Max=0.00 cfs @ 1.00 hrs HW=100.00' (Free Discharge) 't-2=Orifi ce/G rate ( Controls 0.00 cfs) SALEM ST Type 11 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 25 Pond 3P: CHAMBERS - Chamber Wizard Field Chamber Model= StormTech SC-310 Effective Size= 28.9"W x 16.0"H => 2.07 sf x 7.121 = 14.7 cf Overall Size= 34.0"W x 16.0"H x 7.56'L with 0.44' Overlap 34.0"Wide + 0.0" Spacing = 34.0" C-C 10 Chambers/Row x 7.12' Long = 71.20' + 6.0" End Stone x 2 = 72.20' Base Length 1 Rows x 34.0" Wide + 6.0" Side Stone x 2 = 3.83' Base Width 12.0" Base + 16.0" Chamber Height + 6.0" Cover= 2.83' Field Height 1.0 '/' Side-Z x Height = 34.0" Flare/Side Base Length + Flare x 2 = 77.87' Top Length Base Width + Flare x 2 = 9.50' Top Length 10 Chambers x 14.7 cf= 147.4 cf Chamber Storage 1,424.9 cf Field - 147.4 cf Chambers = 1,277.5 cf Stone x 40.0%Voids = 511.0 cf Stone Storage Stone + Chamber Storage = 658.4 cf= 0.015 of 10 Chambers 52.8 cy Field 47.3 cy Stone �r 0 SALEM ST Type/1 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Paqe 26 Pond 3P: CHAMBERS Hydro graph 0.36 CfS0 Inflow Inflow Area=0.070 ac # Outflow Discarded Peak Elev=101.36' E3 Primary 0.35 w - Storage=0.006 of - 0.3- 0.25 0.2 u. 0.15- - - - 0.1 m 005 cfs 0 e a � s na ai soa a ,a aa� n sa a Aso s s�na ;9.' 1 2 3 4 5 6 7 8 9 1011 1213 14 15 16 1718 19 20 Time (hours) SALEM ST Type/1 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD0 9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 27 Summary for Pond 9P: CHAMBERS Inflow Area = 0.200 ac, 32.64% Impervious, Inflow Depth > 0.89" for 2YR event Inflow = 0.40 cfs @ 11.90 hrs, Volume= 0.015 of Outflow = 0.05 cfs @ 12.18 hrs, Volume= 0.015 af, Atten= 87%, Lag= 16.9 min Discarded = 0.05 cfs @ 12.18 hrs, Volume= 0.015 of Primary = 0.00 cfs @ 1.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 101.08' @ 12.18 hrs Surf.Area= 0.013 ac Storage= 0.005 of Plug-Flow detention time= 33.3 min calculated for 0.015 of(100% of inflow) Center-of-Mass det. time= 32.8 min ( 839.3 -806.6 ) Volume Invert Avail.Storage Storage Description #1A 100.00, 0.022 of 5.25'W x 72.20'L x 4.00'H Field A Z=1.0 0.065 of Overall -0.011 of Embedded = 0.055 of x 40.0%Voids #2A 101.00, 0.011 of StormTech SC-740 x 10 Inside#1 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L =45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap 0.032 of Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Discarded 100.00' 4.000 in/hr Exfiltration over Surface area #2 Primary 104.00' 6.0" Horiz. Orifice/Grate X 10.00 C= 0.600 Limited to weir flow at low heads Qiscarded OutFlow Max=0.05 cfs @ 12.18 hrs HW=101.08' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.05 cfs) Primary OutFlow Max=0.00 cfs @ 1.00 hrs HW=100.00' (Free Discharge) 't-2=Orifice/Grate ( Controls 0.00 cfs) SALEM ST Type/1 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 28 Pond 9P: CHAMBERS - Chamber Wizard Field A Chamber Model=StormTech SC-740 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.121 = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.561 with 0.44' Overlap 51.0" Wide + 0.0" Spacing = 51.0" C-C 10 Chambers/Row x 7.12' Long = 71.20' + 6.0" End Stone x 2 = 72.20' Base Length 1 Rows x 51.0" Wide + 6.0" Side Stone x 2 = 5.25' Base Width 12.0" Base + 30.0" Chamber Height+ 6.0" Cover=4.00' Field Height 1.0 7' Side-Z x Height= 48.0" Flare/Side Base Length + Flare x 2 = 80.20'Top Length Base Width + Flare x 2 = 13.25' Top Length 10 Chambers x 45.9 cf=459.4 cf Chamber Storage 2,840.7 cf Field -459.4 cf Chambers = 2,381.3 cf Stone x 40.0% Voids = 952.5 cf Stone Storage Stone + Chamber Storage = 1,411.9 cf= 0.032 of 10 Chambers 105.2 cy Field 88.2 cy Stone r- v SALEM ST Type 11 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here) Printed 4/10/2017 HydroCAD09.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 29 Pond 9P: CHAMBERS Hydrograph 0.40 cfs M Inflow l 0.45- Outflow Inflow Area=0.200 ac Discarded - 0 4= Peak-Elev-'101.08, Primary Storage=0.005 of 0.35 0.3 0.25_ _o 0.2 v_ 0.15= 0.1 0.05 cfs 1 2 3 4 5 6 7 8 9 1011 1213 14 15 16 1718 19 20 Time (hours) SALEM ST Type/1 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 30 Summary for Pond EXFIL: CHAMBERS Inflow Area = 0.685 ac, 22.22% Impervious, Inflow Depth > 0.70" for 2YR event Inflow = 0.72 cfs @ 12.05 hrs, Volume= 0.040 of Outflow = 0.15 cfs @ 12.41 hrs, Volume= 0.040 af, Atten= 80%, Lag= 21.7 min Discarded = 0.15 cfs @ 12.41 hrs, Volume= 0.040 of Primary = 0.00 cfs @ 1.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 100.90' @ 12.41 hrs Surf.Area= 1,579 sf Storage= 503 cf Plug-Flow detention time= 26.5 min calculated for 0.040 of(100% of inflow) Center-of-Mass det. time= 25.8 min ( 850.2 -824.4 ) Volume Invert Avail.Storage Storage Description #1A 100.00, 4,003 cf 6.25'W x 194.24'L x 5.00'H Field A Z=1.0 11,249 cf Overall - 1,240 cf Embedded = 10,009 cf x 40.0%Voids #2A 101.00, 1,240 cf StormTech SC-740 x 27 Inside#1 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L =45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap 5,244 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Discarded 100.00' 4.000 in/hr Exfiltration over Surface area #2 Primary 104.33' 6.0" Horiz. Orifice/Grate X 44.00 C= 0.600 Limited to weir flow at low heads Discarded OutFlow Max=0.15 cfs @ 12.41 hrs HW=100.90' (Free Discharge) 't-1=Exfiltration (Exfiltration Controls 0.15 cfs) Primary OutFlow Max=0.00 cfs @ 1.00 hrs HW=100.00' (Free Discharge) 't-2=Orifi ce/G rate ( Controls 0.00 cfs) SALEM ST Type/1 24-hr 2YR Rainfall=3.20" Prepared by{enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 31 Pond FIL: CHAMBERS - Chamber Wizard Field A Chamber Model= StormTech SC-740 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.121 = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap 51.0" Wide + 0.0" Spacing = 51.0" C-C 27 Chambers/Row x 7.12' Long = 192.24' + 12.0" End Stone x 2 = 194.24' Base Length 1 Rows x 51.0" Wide + 12.0" Side Stone x 2 = 6.25' Base Width 12.0" Base + 30.0" Chamber Height+ 18.0" Cover= 5.00' Field Height 1.0 '/' Side-Z x Height= 60.0" Flare/Side Base Length + Flare x 2 = 204.24' Top Length Base Width + Flare x 2 = 16.25' Top Length 27 Chambers x 45.9 cf= 1,240.4 cf Chamber Storage 11,248.9 cf Field - 1,240.4 cf Chambers = 10,008.5 cf Stone x 40.0% Voids = 4,003.4 cf Stone Storage Stone + Chamber Storage = 5,243.8 cf= 0.120 of 27 Chambers 416.6 cy Field 370.7 cy Stone 5 SALEM ST Type/1 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 Hydro',AD Software Solutions LLC Page 32 Pond EXFIL: CHAMBERS Hydrograph 0.72 CfS0 Inflow Inflow Area=O'.685 ac ' Outflow 0.8 Discarded Peak Elev=100.90' - E3 Primary 0.7_ Storage=503 cf 0.6 0.5 m 0.4- 0 LL 0.3 m 0`.15 cfs 0.2 0.00 cfs 0— a 3 esag r iev q a a, saars x g eta r ae ,`/ao ...f is � 1 2 3 4 5 6 7 8 9 14 15 16 1718 1'9­iO Time (hours) SALEM ST Type // 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here) Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 33 Summary for Pond OUTFLOW: prop ne Inflow Area = 2.032 ac, 7.49% Impervious, Inflow Depth > 0.18" for 2YR event Inflow = 0.30 cfs @ 12.11 hrs, Volume= 0.031 of Primary = 0.30 cfs @ 12.11 hrs, Volume= 0.031 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Pond OUTFLOW: prop ne Hydro graph Inflow Inflow re = . 3 0.30 cfs - Primary 0.3- 0.25 0.2 o 0.15_ 0.1 0.05- Q ,¢.a 1 2 3 4 5 6 7 8 9 101112 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type 1124-hr 2YR Rainfall=3.20" Prepared by{enter your company name here) Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 Hydro CAD Software Solutions LLC Page 34 Summary for Pond POND: dpond Inflow Area = 0.330 ac, 0.00% Impervious, Inflow Depth > 0.25" for 2YR event Inflow = 0.09 cfs @ 12.03 hrs, Volume= 0.007 of Outflow = 0.07 cfs @ 12.08 hrs, Volume= 0.007 af, Atten= 17%, Lag= 2.4 min Discarded = 0.07 cfs @ 12.08 hrs, Volume= 0.007 of Primary = 0.00 cfs @ 1.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 118.52' @ 12.08 hrs Surf.Area= 770 sf Storage= 12 cf Plug-Flow detention time= 2.7 min calculated for 0.007 of(100% of inflow) Center-of-Mass det. time= 1.9 min ( 871.2 - 869.3 ) Volume Invert Avail.Storage Storage Description #1 118.50' 1,593 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 118.50 764 0 0 119.00 953 429 429 120.00 1,374 1,164 1,593 Device Routing Invert Outlet Devices #1 Discarded 118.50' 4.000 in/hr Exfiltration over Surface area #2 Primary 119.50' 10.0' long x 3.0' 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 4.00 4.50 Coef. (English) 2.44 2.58 2.68 2.67 2.65 2.64 2.64 2.68 2.68 2.72 2.81 2.92 2.97 3.07 3.32 Discarded OutFlow Max=0.07 cfs @ 12.08 hrs HW=118.52' (Free Discharge) L1=Exfiltration (Exfiltration Controls 0.07 cfs) Primary OutFlow Max=0.00 cfs @ 1.00 hrs HW=118.50' (Free Discharge) L2=Broad-Crested Rectangular Weir( Controls 0.00 cfs) SALEM ST Type 1124-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 35 Pond POND: dpond dr gra h 0.09 Cfs InflowEl Outflow Inflow Area=0.330 ac - - E Discarded 0.09 M Peak Elev=118. Primary m 0.07 cfs - 0.08-� Storage=12 cf 0.07 m 4 0.06= 3 0.05 0 0.04- v_ 0.03 m 0.02 1 2 3 4 5 6 7 8 9 10 1112 1314 1516 1718 1920 Time (hours) SALEM ST Type/1 24-hr 2YR Rainfall=3.20" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 36 Summary for Link 7L: prop Salem st Inflow Area = 1.010 ac, 6.47% Impervious, Inflow Depth > 0.12" for 2YR event Inflow = 0.13 cfs @ 12.04 hrs, Volume= 0.010 of Primary = 0.13 cfs @ 12.04 hrs, Volume= 0.01Oaf, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Link 7L: prop salem st Hydro graph Inflow 0.13 cfs Primary 0.14- Inflow rea=1.01 0.12 0.1 0.08- o ,i 0.06-: 0.04 0.02 0aj 1 s s anus a i s as s r �a oca is ep via 1 2 3 4 5 6 7 8 9 1011 12 1314151617181920 Time (hours) SALEM ST Type/1 24-hr 10YR Rainfall=4.80" Prepared by{enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 37 Time span=1.00-20.00 hrs, dt=0.05 hrs, 381 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method SubcatchmentA-1: EX salem st Runoff Area=37,454 sf 0.00% Impervious Runoff Depth>0.77" Flow Length=267' Tc=9.0 min CN=55 Runoff=1.02 cfs 0.055 of SubcatchmentA-2: EX NE Runoff Area=92,701 sf 0.00% Impervious Runoff Depth>0.77" Flow Length=540' Slope=0.0644'/' Tc=14.1 min CN=55 Runoff=2.02 cfs 0.136 of SubcatchmentA-3: EX se Runoff Area=14,047 sf 0.00% Impervious Runoff Depth>0.77" Flow Length=172' Slope=0.1511 T Tc=6.5 min CN=55 Runoff=0.43 cfs 0.021 of SubcatchmentA-4: EX nw Runoff Area=56,994 sf 0.00% Impervious Runoff Depth>0.77" Flow Length=272' Slope=0.0808 T Tc=9.6 min CN=55 Runoff=1.51 cfs 0.084 of SubcatchmentA-5: internal Runoff Area=11,128 sf 0.00% Impervious Runoff Depth>0.77" Flow Length=166' Slope=0.1206 '/' Tc=7.1 min CN=55 Runoff=0.33 cfs 0.016 of SubcatchmentP-1A: PROPOSED Runoff Area=4,166 sf 0.00% Impervious Runoff Depth>0.95" Flow Length=150' Tc=6.3 min CN=58 Runoff=0.17 cfs 0.008 of SubcatchmentP-1 B1: proposed Runoff Area=16,710 sf 0.00% Impervious Runoff Depth>0.87" Flow Length=230' Tc=8.5 min CN=57 Runoff=0.54 cfs 0.028 of SubcatchmentP-1 132: proposed Runoff Area=14,384 sf 0.00% Impervious Runoff Depth>0.86" Flow Length=71' Slope=0.1400 '/' Tc=7.5 min CN=57 Runoff=0.48 cfs 0.024 of SubcatchmentP-1 C: DRIVELOT1 Runoff Area=8,714 sf 32.64% Impervious Runoff Depth>1.96" Flow Length=50' Slope=0.3300 '/' Tc=0.4 min CN=73 Runoff=0.87 cfs 0.033 of SubcatchmentP-2A: PROPOSED Runoff Area=12,162 sf 0.00% Impervious Runoff Depth>0.87" Flow Length=130' Slope=0.1090 '/' Tc=7.0 min CN=57 Runoff=0.43 cfs 0.020 of SubcatchmentP-213: PROPOSED Runoff Area=46,507 sf 0.00% Impervious Runoff Depth>0.92" Flow Length=423' Tc=13.2 min CN=58 Runoff=1.33 cfs 0.081 of SubcatchmentP-2C: (new Subcat) Runoff Area=29,848 sf 22.22% Impervious Runoff Depth>1.66" Flow Length=397' Tc=11.6 min CN=69 Runoff=1.78 cfs 0.095 of SubcatchmentP-3: PROPOSED Runoff Area=6,115 sf 0.00% Impervious Runoff Depth>0.77" Flow Length=250' Slope=0.1200 '/' Tc=7.9 min CN=55 Runoff=0.18 cfs 0.009 of SubcatchmentP-4: prop nw Runoff Area=39,341 sf 0.00% Impervious Runoff Depth>0.87" Flow Length=351' Slope=0.0764'/' Tc=10.8 min CN=57 Runoff=1.17 cfs 0.066 of SubcatchmentP-5: internal Runoff Area=10,767 sf 0.00% Impervious Runoff Depth>1.02" Flow Length=116' Slope=0.1206'/' Tc=6.6 min CN=59 Runoff=0.46 cfs 0.021 of Subcatchment P3A: LOT31DRIVE Runoff Area=3,045 sf 100.00% Impervious Runoff Depth>4.33" Flow Length=100' Slope=0.1500 '/' Tc=0.5 min CN=98 Runoff=0.54 cfs 0.025 of SALEM ST Type 11 24-hr 10YR Rainfall=4.80" Prepared by{enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 38 Reach 8R: (new Reach) Avg. Depth=0.00' Max Vet=0.00 fps Inflow=0.00 cfs 0.000 of n=0.022 L=100.0' S=0.1700'/' Capacity=13.88 cfs Outflow=0.00 cfs 0.000 of Reach 1 OR: COVERT Avg. Depth=0.13' Max Vet=3.32 fps Inflow=1.33 cfs 0.081 of 36.0"x 12.0" Box Pipe n=0.009 L=73.0' S=0.0068 '/' Capacity=21.32 cfs Outflow=1.31 cfs 0.081 of Pond 2P: prop se Inflow=0.18 cfs 0.009 of Primary=0.18 cfs 0.009 of Pond 3P: CHAMBERS Peak Elev=101.92' Storage=0.009 of Inflow=0.54 cfs 0.025 of Discarded=0.05 cfs 0.025 of Primary=0.00 cfs 0.000 of Outflow=0.05 cfs 0.025 of Pond 9P: CHAMBERS Peak EIev=102.08' Storage=0.014 of Inflow=0.87 cfs 0.033 of Discarded=0.07 cfs 0.033 of Primary=0.00 cfs 0.000 of Outflow=0.07 cfs 0.033 of Pond EXFIL: CHAMBERS Peak EIev=102.04' Storage=1,750 cf Inflow=1.78 cfs 0.095 of Discarded=0.19 cfs 0.095 of Primary=0.00 cfs 0.000 of Outflow=0.19 cfs 0.095 of Pond OUTFLOW:prop ne Inflow=1.60 cfs 0.102 of Primary=1.60 cfs 0.102 of Pond POND: dpond Peak EIev=118.83' Storage=277 cf Inflow=0.48 cfs 0.024 of Discarded=0.08 cfs 0.024 of Primary=0.00 cfs 0.000 of Outflow=0.08 cfs 0.024 of Link 7L: prop salem st Inflow=0.70 cfs 0.035 of Primary=0.70 cfs 0.035 of Total Runoff Area= 9.276 ac Runoff Volume= 0.722 of Average Runoff Depth = 0.93" 96.90% Pervious = 8.989 ac 3.10% Impervious = 0.287 ac SALEM ST Type/1 24-hr 10YR Rainfall=4.80" Prepared by{enter your company name here} Printed 4/10/2017 HydroCAD09 00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 39 Summary for Subcatchment A-1: EX salem st Runoff = 1.02 cfs @ 12.03 hrs, Volume= 0.055 af, Depth> 0.77" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10YR Rainfall=4.80" Area (sf) CN Description 37,454 55 Woods, Good, HSG B 37,454 100.00% Pervious Area Tc Length Slope Velocity Capacity Description _ (min) (feet) (ft/ft) (ft/sec) (cfs) 6.5 50 0.1000 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 2.5 217 0.0830 1.44 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 9.0 267 Total Subcatchment A-1: EX salem st Hydrograph 1 .02 cfs Runoff Type II 24' hr 10YR Rainfal'1=4.80" Runoff Area--37,454 sf NRunoff Volume=0.055 of unoff Depth>0.77" o Flow Length=267' c=9.0 min N=55 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 1920 Time (hours) SALEM ST Type 11 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 40 Summary for Subcatchment A-2: EX NE Runoff = 2.02 cfs @ 12.09 hrs, Volume= 0.136 af, Depth> 0.77" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10YR Rainfall=4.80" Area (sf) CN Description 92,701 55 Woods, Good, HSG B 92,701 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.7 50 0.0644 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 6.4 490 0.0644 1.27 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 14.1 540 Total Subcatchment A-2: EX NE Hydro graph 2.02 cfs Runoff 2__ ' � Type II 24-hr 10YR Rainfall 4.80'" Runoff Area=92,701 sf Runoff Volume=0.136 of Runoff Depth>0.77 3 Flow Length=540' 0 1- Slope-Q 0644 '/' Tc=1'4.1' min C'N=55 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 1920 Time (hours) SALEM ST Type 11 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HVdroCAD Software Solutions LLC Page 41 Summary for Subcatchment -3: EX se Runoff = 0.43 cfs @ 12.00 hrs, Volume= 0.021 af, Depth> 0.77" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10YR Rainfall=4.80" Area (sf) CN Description 14,047 55 Woods, Good, HSG B 14,047 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (fUsec) (cfs) 5.5 50 0.1511 0.15 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 1.0 122 0.1511 1.94 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 6.5 172 Total Subcatchment A-3: EX se Hydro graph 043 cfs Runoff 0.45� Type 11 2 -hr 10Y R 0.4-- Rainfall=4.80" 0.35- Runoff Area=14,047 sf rr, 0.3 Runoff Volume=0.021 of Runoff Depth>0.77' 0.25_ Flow Len 'th=172° �° 0.2 Slope=0.1511 0.15 Tc=6.5 mire CN=55 0.1 0.05 A 0 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type 11 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 42 Summary for Subcatchment A-4: EX nw Runoff = 1.51 cfs @ 12.04 hrs, Volume= 0.084 af, Depth> 0.77" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10YR Rainfall=4.80" Area (sf) CN Description 56,994 55 Woods, Good, HSG B 56,994 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.0 50 0.0808 0.12 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 2.6 222 0.0808 1.42 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 9.6 272 Total Subcatchment A-4: EX nw Hydrograph 1 .51 cfs Runoff Type II 24-hr 10Y Rainfall,=4.80°' Runoff Area=56,994 sf _Runoff Volumrte=0_.0.84 of y Runoff Depth>0.77 Flow Length=272' Slope=U.0808 /' Tc=9.6 min CN=55 0 a' �I 1,14 tq . y� 1 2 3 4 5 6 7 8 9 1011 12 131415 161718 1920 Time (hours) SALEM ST Type //24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 43 Summary for Subcatchment A-5: internal Runoff = 0.33 cfs @ 12.00 hrs, Volume= 0.016 af, Depth> 0.77" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10YR Rainfall=4.80" Area (sf) CN Description 11,128 55 Woods Good, HSG B 11,128 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 50 0.1206 0.14 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 1.1 116 0.1206 1.74 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 7.1 166 Total Subcatchment A-5: internal yroral 033 cfs 0.35- Runoff Type 11 24-hr 10YR '- 0.3 _ Rainfall=480„ Runoff Area=11,128_Sf 0.25= Runoff Volume=0.016 of 0.2- Runoff Dep th>0.77" - - Flow Length=166' E 0.15 Slope=0.1206 °/' Tc=7.1 min v 0.1 m. C'N=55 0.05- 0 qaa gip . ;" 1 2 3 4 5 6 7 8 9 10 11 12 1314151617181920 Time (hours) SALEM ST Type 11 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Pare 44 Summary for Subcatchment P-1A: PROPOSED Runoff = 0.17 cfs @ 11.99 hrs, Volume= 0.008 af, Depth> 0.95" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10YR Rainfall=4.80" Area (sf) CN Description 2,208 61 >75% Grass cover, Good, HSG B 1,958 55 Woods, Good, HSG B 4,166 58 Weighted Average 4,166 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 4.3 50 0.0400 0.20 Sheet Flow, Grass: Short n= 0.150 P2= 3.22" 2.0 100 0.0140 0.83 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 6.3 150 Total Subcatchment P-1A: PROPOSED Hydrograph 0.18- - .17 CfS - Runoff Type II 24-hr 10YR 0.16- ainfall=4.80" 0.14-- Runoff Area=4,166 sf 0.12_ I Runoff Volume=0.008 of v 0.1 _ Runoff Depth>0.95" Flow Length=150' 2 0.08- Tc=6.3 min CN=58 r 0.04= 0.02 _ 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type // 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here) Printed 4/10/2017 HydroCADO 9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 45 Summary for Subcatchment P-1 1: proposed Runoff = 0.54 cfs @ 12.02 hrs, Volume= 0.028 af, Depth> 0.87" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10YR Rainfall=4.80" Area (sf) CN Description 11,854 55 Woods, Good, HSG B 4,856 61 >75% Grass cover, Good, HSG B _- 16,710 57 Weighted Average 16,710 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (fUsec) (cfs) 6.5 50 0.1000 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 0.9 52 0.0400 1.00 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 1.2 128 0.1250 1.77 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 8.5 230 Total Subcatchment P-1 B1: proposed Hydrograph 0.6 Runoff 0 54 cfs 0.55_ Type_II 24-hr 10YR - 0.5- Rainfall=4.80" 0.45-= Runoff Area=16,710 sf 0.4 Runoff Volume=0.028 of 0.35 Runoff Depth>0.87" 0.3- Flow Length=230' UO 0.25 Tc=8.5 min 0.2- CN=57 0.15 0.1 0.05 0 e:. 1 2 3 4 5 6 7 8 9 1011 12 1314 15 16 17 18 19 20 Time (hours) SALEM ST Type 11 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 46 Summary for Subcatchment P-1 2: proposed Runoff = 0.48 cfs @ 12.00 hrs, Volume= 0.024 af, Depth> 0.86" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10YR Rainfall=4.80" Area (sf) CN Description 10,623 55 Woods, Good, HSG B 3,761 61 >75% Grass cover, Good, HSG B 14,384 57 Weighted Average 14,384 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (fUsec) (cfs) 7.5 71 0.1400 0.16 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" Subcatchment P-1 B2: proposed Hydrograph = � Runoff 0.48 Cfs 0.5 Type II 2 -hr_10YR 0.45.. , Rainfall=4.80;' 0.4 Runoff Area=14 384 sf 0.35- Runoff Volume=0.024 of 0.3- Runoff Depth>0.86" 0.25 Flow Length=71° ° Slope=0.1400 °/' �- 0.2 Tc=7.5_min N 0.15 _ CN=57 0.1 0.05-T 1 2 3 4 5 6 7 8 9 1011 121314151617181920 Time (hours) SALEM ST Type/1 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 47 Summary for Subcatchment -1 C: DIVELT1 Runoff = 0.87 cfs @ 11.90 hrs, Volume= 0.033 af, Depth> 1.96" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10YR Rainfall=4.80" Area (sf) CN Description 2,844 98 Paved parking, HSG B 5,870 61 >75% Grass cover, Good, HSG B 8,714 73 Weighted Average 5,870 67.36% Pervious Area 2,844 32.64% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.4 50 0.3300 2.12 Sheet Flow, n= 0.022 P2= 3.22" Subcatchment P-1 C: DRIVELOT1 y rorah 0.$7 CfS Runoff 0.9_ Type 11 hr 10Y 0.8_ Rainfall=4 80" 0.7- Runoff Area=8,714 Sf = Runoff Volume=0.033 of 0.6- Runoff-De th>1. p 96" 0.5 Flow Length=50' 3 u ,° 0.4 Slope=0.3300 - Tc=0 4 min 0.3- -C =73 0.2 0.1 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type 11 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HVdroCAD Software Solutions LLC Page 48 Summary for Subcatchment P-2A: PROPOSED Runoff = 0.43 cfs @ 12.00 hrs, Volume= 0.020 af, Depth> 0.87" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10YR Rainfall=4.80" Area (sf) CN Description 3,787 61 >75% Grass cover, Good, HSG B 8,375 55 Woods, Good, HSG B 12,162 57 Weighted Average 12,162 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.2 50 0.1090 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 0.8 80 0.1090 1.65 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 7.0 130 Total Subcatchment P-2A: PROPOSED Hydrograph 0.43 cfs - - - Runoff 0.45- Type II 24-hr 10YR 0.4 R ainfall=4.80" 0.35- Runoff Are:a=12,r162 sf'' -- 0.3 _ Runoff Volume=0.020 of Runoff Depth>0.87" 3 0.25- Flow Length=130' �° 0.2 Slope=0.1090 '/' - 0.15 _ Tc=7.0 min C'N=57 0.1 _ 0.05- 0 "�, PEP . 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type 11 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCADO 9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 49 Summary for Subcatchment P-2B: PROPOSED Runoff = 1.33 cfs @ 12.07 hrs, Volume= 0.081 af, Depth> 0.92" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10YR Rainfall=4.80" Area (sf) CN Description 25,775 55 Woods, Good, HSG B 20,732 61 >75% Grass cover, Good, HSG B 46,507 58 Weighted Average 46,507 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.9 50 0.0600 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 0.9 109 0.1800 2.12 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 2.6 134 0.0150 0.86 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 1.8 130 0.0300 1.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 13.2 423 Total Subcatchment P-21B: PROPOSED Hydro graph 1 .33 cfs Runoff Type II 12 -hr 10Y Rainfall=4.80®' 1- Runoff Area=46,507 sf Runoff Volume=0.0 1 of Runoff Depth>0.92" o Flow Length=423' Tc=13.2 min CN=58 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 161718 1920 Time (hours) SALEM ST Type 11 24-hr 10YR Rainfall=4.80" Prepared by{enter your company name here) Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 50 Summary for Subcatchment P-2C: (new Subcat) Runoff = 1.78 cfs @ 12.04 hrs, Volume= 0.095 af, Depth> 1.66" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10YR Rainfall=4.80" Area (sf) CN Description 23,215 61 >75% Grass cover, Good, HSG B 6,633 98 Paved parking, HSG B 29,848 69 Weighted Average 23,215 77.78% Pervious Area 6,633 22.22% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.4 50 0.0100 0.11 Sheet Flow, Grass: Short n= 0.150 P2= 3.22" 2.8 137 0.0140 0.83 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 1.4 210 0.1200 2.42 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 11.6 397 Total Subcatchment P-2C: (new Subcat) Hydro graph 1 .78 cfs Runoff Type II'24-hr'10Y Rainfall=4.80®' Runoff Area=29,848 sf Runoff Volume=0.095 of 1 Runoff Depth>1.66" _o Flow Length=397' Tc=11.6 min =69 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 1920 Time (hours) SALEM ST Type // 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 51 Summary for Subcatchment P-3: PROPOSED Runoff = 0.18 cfs @ 12.01 hrs, Volume= 0.009 af, Depth> 0.77" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10YR Rainfall=4.80" Area (sf) CN Description 6,115 55 Woods Good, HSG B 6,115 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 50 0.1200 0.14 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 1.9 200 0.1200 1.73 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 7.9 250 Total Subcatchment P-3: PROPOSED Hydro graph 0.18 cfs Runoff 0.18 Type 11 24-hr 10YR 0.16 Rainfall=480" 0.14 Runoff Are'a=6,1'15 sfi - -- = -Runoff Volume=0.009 of - rn 0.12 - Runoff Depth>0.77"_ - �" 0.1 Flow Length=250' ° 0.08 p =Slo a0 1200 '/' 0.06- Tc=79 min CN=55 0.04 d 0.02 0 a . 'a 1 2 3 4 5 6 7 8 9 1011 121314151617181920 Time (hours) SALEM ST Type 11 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 52 Summary for Subcatchment P-4: prop nw Runoff = 1.17 cfs @ 12.05 hrs, Volume= 0.066 af, Depth> 0.87" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10YR Rainfall=4.80" Area (sf) CN Description 12,424 61 >75% Grass cover, Good, HSG B 26,917 55 Woods, Good, HSG B 39,341 57 Weighted Average 39,341 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.2 50 0.0764 0.12 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 3.6 301 0.0764 1.38 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 10.8 351 Total Subcatchment P-4: prop nw ydrorah 1 .17 ds Runoff Type II 24-hr 10YR Rainfall=4.80 Runoff Area=-39,341',sf Runoff Volume=0.066 of Runoff Depth>0.87 Flow Length=351' Slope=0.076 /' Tc=1'0.8 min C =57 0- n � 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type // 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 53 Summary for Subcatchment P-5: internal Runoff = 0.46 cfs @ 11.99 hrs, Volume= 0.021 af, Depth> 1.02" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10YR Rainfall=4.80" Area (sf) CN Description 8,014 61 >75% Grass cover, Good, HSG B 2,753 55 Woods, Good, HSG B 10,767 59 Weighted Average 10,767 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) Oft) (ft/sec) (cfs) 6.0 50 0.1206 0.14 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 0.6 66 0.1206 1.74 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 6.6 116 Total Subcatchment P-5: internal 7oropl 0.5= 046 cfs Runoff 0.45 Type_ R r, R II 24-hr 10Y 0.4 _ Rainfall=4.80'�` -Runoff Area=10,767 sf 0.35 Runoff Volume=0.021 of 0.3 _ Runo ff Depth>1.02" Flow Len �th=116' � 0.25 9 �- 0.2 Slope=0.1206 7' -Tc=6.6 mirk - 0.15 _ CN=59 0.1 a 0.05 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type 11 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 54 Summary for Subcatchment P3A: LOT3DIVE Runoff = 0.54 cfs @ 11.89 hrs, Volume= 0.025 af, Depth> 4.33" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10YR Rainfall=4.80" Area (sf) CN Description 3,045 98 Paved parking, HSG B 3,045 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.5 100 0.1500 3.09 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.22" Subcatchment P3A: LOT31DIVE Hydro graph 0.6 rt 0.54 ds Runoff 0.55_ Type 11 24-hr 10YR 0.5 Rainfall=4.80 - 0.45 Runoff;Area=3,045 sf _ 0.4 Runoff Volume=0.025 of w 0.35-- ' Runoff Depth>4.33" 0.37- Flow Length=100' ` 7 0.25 Slope=0.1500 '/' f 0.2- Tc=0.5 min ' - - 0.15 e CN=98 _ - 0.1 0.05= 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 1617 18 19 20 Time (hours) SALEM ST Type/1 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here) Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 55 Summary for Reach 8 : (new Reach) Inflow Area = 0.330 ac, 0.00% Impervious, Inflow Depth = 0.00" for 10YR event Inflow = 0.00 cfs @ 1.00 hrs, Volume= 0.000 of Outflow = 0.00 cfs @ 1.00 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 0.00 fps, Min. Travel Time= 0.0 min Avg. Velocity = 0.00 fps, Avg. Travel Time= 0.0 min Peak Storage= 0 cf @ 1.00 hrs, Average Depth at Peak Storage= 0.00' Bank-Full Depth= 0.60', Capacity at Bank-Full= 13.88 cfs 2.50' x 0.60' deep Parabolic Channel, n= 0.022 Length= 100.0' Slope= 0.1700 '/' Inlet Invert= 119.00', Outlet Invert= 102.00' Reach 8 : (new Reach) ydroa h El Inflow 1E3 Outflow Inflow Area=0.330 ac Avg. Depth=0.0 ' MaxVeI=000; fps -- n=0.02 100.0' o =0.1700 T Capacity=13.88 cfs 0.00 cfs 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type 11 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here) Printed 4/10/2017 fydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 56 Summary for Reach 1 OR: CUVERT Inflow Area = 1.068 ac, 0.00% Impervious, Inflow Depth > 0.92" for 10YR event Inflow = 1.33 cfs @ 12.07 hrs, Volume= 0.081 of Outflow = 1.31 cfs @ 12.08 hrs, Volume= 0.081 af, Atten= 2%, Lag= 0.7 min Routing by Stor-Ind+Trans method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 3.32 fps, Min. Travel Time= 0.4 min Avg. Velocity = 1.16 fps, Avg. Travel Time= 1.0 min Peak Storage= 29 cf @ 12.08 hrs, Average Depth at Peak Storage= 0.13' Bank-Full Depth= 1.00', Capacity at Bank-Full= 21.32 cfs 36.0"W x 12.0" H Box Pipe n= 0.009 Length= 73.0' Slope= 0.0068 7' Inlet Invert= 117.50', Outlet Invert= 117.00' Reach 10R: CUVERT Hydro graph �fM Inflow Inflow Area=1.068 ac 1'.31 ds Outflow Avg. Depth=0.13' Max Vet=3.32 fps 36.0" x 120" Box Pipe n 0.009 o L=73.0' u_ S=00068 '/' Capacity=21.32 cfs r: O ,E ;� 1 2 3 4 5 6 7 8 9 1011 12 1314151617181920 Time (hours) SALEM ST Type 1124-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 57 Summary for Pond 2P: prop se Inflow Area = 0.210 ac, 33.24% Impervious, Inflow Depth > 0.51" for 10YR event Inflow = 0.18 cfs @ 12.01 hrs, Volume= 0.009 of Primary = 0.18 cfs @ 12.01 hrs, Volume= 0.009 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Pond 2P: prop se Hydro graph Inflow 0.18 Inflowre =0. 1 ®.18 CfS Primary 0.16 0.14- ! r 0.12 - - z 01 � s 0.08- 0.06 0.04 - - 0.02 1 2 3 4 5 6 7 8 9 101112 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type 11 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 58 Summary for Pond 3 : CHAMBERS Inflow Area = 0.070 ac,100.00% Impervious, Inflow Depth > 4.33" for 10YR event Inflow = 0.54 cfs @ 11.89 hrs, Volume= 0.025 of Outflow = 0.05 cfs @ 12.19 hrs, Volume= 0.025 af, Atten= 90%, Lag= 17.7 min Discarded = 0.05 cfs @ 12.19 hrs, Volume= 0.025 of Primary = 0.00 cfs @ 1.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 101.92' @ 12.19 hrs Surf.Area= 0.013 ac Storage= 0.009 of Plug-Flow detention time= 55.9 min calculated for 0.025 of(100% of inflow) Center-of-Mass det. time= 55.5 min ( 764.5 - 709.1 ) Volume Invert Avail.Storage Storage Description #1A 100.00, 0.012 of 3.83'W x 72.201 x 2.83'H Field A Z=1.0 0.033 of Overall - 0.003 of Embedded = 0.029 of x 40.0% Voids #2A 101.00, 0.003 of StormTech SC-310 x 10 Inside#1 Effective Size= 28.9"W x 16.0"H => 2.07 sf x 7.12'L = 14.7 cf Overall Size= 34.0"W x 16.0"H x 7.561 with 0.44' Overlap 0.015 of Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Discarded 100.00' 4.000 in/hr Exfiltration over Surface area #2 Primary 102.83' 6.0" Horiz. Orifice/Grate X 10.00 C= 0.600 Limited to weir flow at low heads Discarded OutFlow Max=0.05 cfs @ 12.19 hrs HW=101.92' (Free Discharge) 't-1=Exfiltration (Exfiltration Controls 0.05 cfs) Primary OutFlow Max=0.00 cfs @ 1.00 hrs HW=100.00' (Free Discharge) '-2=Orifice/Grate ( Controls 0.00 cfs) SALEM ST Type Il 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 59 Pond 3P: CHAMBERS - Chamber Wizard Field A Chamber Model= StormTech SC-310 Effective Size= 28.9"W x 16.0"H => 2.07 sf x 7.12'L = 14.7 cf Overall Size= 34.0"W x 16.0"H x 7.561 with 0.44' Overlap 34.0" Wide + 0.0" Spacing = 34.0" C-C 10 Chambers/Row x 7.12' Long = 71.20' + 6.0" End Stone x 2 = 72.20' Base Length 1 Rows x 34.0" Wide + 6.0" Side Stone x 2 = 3.83' Base Width 12.0" Base + 16.0" Chamber Height+ 6.0" Cover= 2.83' Field Height 1.0 '/' Side-Z x Height = 34.0" Flare/Side Base Length + Flare x 2 = 77.87' Top Length Base Width + Flare x 2 = 9.50' Top Length 10 Chambers x 14.7 cf= 147.4 cf Chamber Storage 1,424.9 cf Field - 147.4 cf Chambers = 1,277.5 cf Stone x 40.0% Voids = 511.0 cf Stone Storage Stone + Chamber Storage = 658.4 cf= 0.015 of 10 Chambers 52.8 cy Field 47.3 cy Stone 0 SALEM ST Type 11 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 60 Pond 3 : CHAMBERS Hydro graph 0.54 cfs Inflow Inflow Area=O.070 ac Outflow 0.6 Discarded 0 Ee 0.009.92, El Primary 0 5= Sto a ge -af 0.45= 0.35= 0.3= 0 0.25= LL 0.2 0.15= 005 cfs i= ry 0 s r a �_ea a 3° 9 " sr as '1 s 9 a asn rase . 1 2 3 4 5 6 7 8 9 1011 1213 14 15 16 1718 19 20 Time (hours) SALEM ST Type/1 24-hr 10YR Rainfall=4.80" Prepared by{enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 61 Summary for Pond 9P: CHAMBERS Inflow Area = 0.200 ac, 32.64% Impervious, Inflow Depth > 1.96" for 10YR event Inflow = 0.87 cfs @ 11.90 hrs, Volume= 0.033 of Outflow = 0.07 cfs @ 12.44 hrs, Volume= 0.033 af, Atten= 92%, Lag= 32.6 min Discarded = 0.07 cfs @ 12.44 hrs, Volume= 0.033 of Primary = 0.00 cfs @ 1.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 102.08' @ 12.44 hrs Surf.Area= 0.016 ac Storage= 0.014 of Plug-Flow detention time= 90.1 min calculated for 0.032 of(100% of inflow) Center-of-Mass det. time= 89.4 min ( 879.2 - 789.8 ) Volume Invert Avail.Storage Storage Description #1A 100.00, 0.022 of 5.25'W x 72.20'L x 4.00'H Field A Z=1.0 0.065 of Overall - 0.011 of Embedded = 0.055 of x 40.0% Voids #2A 101.00, 0.011 of StormTech SC-740 x 10 Inside#1 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap 0.032 of Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Discarded 100.00' 4.000 in/hr Exfiltration over Surface area #2 Primary 104.00' 6.0" Horiz. Orifice/Grate X 10.00 C= 0.600 Limited to weir flow at low heads Qiscarded OutFlow Max=0.07 cfs @ 12.44 hrs HW=102.07' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.07 cfs) Primary OutFlow Max=0.00 cfs @ 1.00 hrs HW=100.00' (Free Discharge) 't-2=Orifice/Grate ( Controls 0.00 cfs) SALEM ST Type 11 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 62 Pond 9P: CHAMBERS - Chamber Wizard Field Chamber Model_ StormTech SC-740 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap 51.0" Wide + 0.0" Spacing = 51.0" C-C 10 Chambers/Row x 7.12' Long = 71.20' + 6.0" End Stone x 2 = 72.20' Base Length 1 Rows x 51.0" Wide + 6.0" Side Stone x 2 = 5.25' Base Width 12.0" Base + 30.0" Chamber Height+ 6.0" Cover= 4.00' Field Height 1.0 '/' Side-Z x Height = 48.0" Flare/Side Base Length + Flare x 2 = 80.20'Top Length Base Width + Flare x 2 = 13.25' Top Length 10 Chambers x 45.9 cf= 459.4 cf Chamber Storage 2,840.7 cf Field -459.4 cf Chambers = 2,381.3 cf Stone x 40.0% Voids = 952.5 cf Stone Storage Stone + Chamber Storage = 1,411.9 cf= 0.032 of 10 Chambers 105.2 cy Field 88.2 cy Stone � ,F. SALEM ST Type 1124-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 63 Pond 9P: CHAMBERS Hydrograph 0.87 Cfs - - inflow ED Inflow Area=0.200 ac OutFlow Discarded 0.9- Peak Elev=102.08' Primary 0.8- 9 Stora a=0.01 of 0.7= 0.6 U - .. 0.5 ° 0.4 u. a. I 0.3= _ 0.2 1 0.07 Cfs 1 2 3 4 5 6 7 8 9 10 11 1213 14 15 16 1718 19 20 Time (hours) SALEM ST Type/1 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 64 Summary for Pond EFIL: CHAMBERS Inflow Area = 0.685 ac, 22.22% Impervious, Inflow Depth > 1.66" for 10YR event Inflow = 1.78 cfs @ 12.04 hrs, Volume= 0.095 of Outflow = 0.19 cfs @ 12.67 hrs, Volume= 0.095 af, Atten= 89%, Lag= 37.6 min Discarded = 0.19 cfs @ 12.67 hrs, Volume= 0.095 of Primary = 0.00 cfs @ 1.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 102.04' @ 12.67 hrs Surf.Area= 2,050 sf Storage= 1,750 cf Plug-Flow detention time= 91.1 min calculated for 0.095 of(100% of inflow) Center-of-Mass det. time= 90.4 min ( 896.1 - 805.7 ) Volume Invert Avail.Storage Storage Description #1A 100,00, 4,003 cf 6.25'W x 194.24'L x 5.00'H Field A Z=1.0 11,249 cf Overall - 1,240 cf Embedded = 10,009 cf x 40.0%Voids #2A 101.00' 1,240 cf StormTech SC-740 x 27 Inside#1 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.121 =45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap 5,244 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Discarded 100.00' 4.000 in/hr Exfiltration over Surface area #2 Primary 104.33' 6.0" Horiz. Orifice/Grate X 44.00 C= 0.600 Limited to weir flow at low heads Discarded OutFlow Max=0.19 cfs @ 12.67 hrs HW=102.04' (Free Discharge) 't--1=Exfiltration (Exfiltration Controls 0.19 cfs) Primary OutFlow Max=0.00 cfs @ 1.00 hrs HW=100.00' (Free Discharge) 't-2=Orifice/Grate ( Controls 0.00 cfs) SALEM ST Type/1 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 65 Pond EXFIL: CHAMBERS - Chamber Wizard Field A Chamber Model= StormTech SC-740 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.121 = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.561 with 0.44' Overlap 51.0" Wide + 0.0" Spacing = 51.0" C-C 27 Chambers/Row x 7.12' Long = 192.24' + 12.0" End Stone x 2 = 194.24' Base Length 1 Rows x 51.0" Wide + 12.0" Side Stone x 2 = 6.25' Base Width 12.0" Base + 30.0" Chamber Height+ 18.0" Cover= 5.00' Field Height 1.0 '/' Side-Z x Height = 60.0" Flare/Side Base Length + Flare x 2 = 204.24'Top Length Base Width + Flare x 2 = 16.25' Top Length 27 Chambers x 45.9 cf= 1,240.4 cf Chamber Storage 11,248.9 cf Field - 1,240.4 cf Chambers = 10,008.5 cf Stone x 40.0% Voids = 4,003.4 cf Stone Storage Stone + Chamber Storage = 5,243.8 cf= 0.120 of 27 Chambers 416.6 cy Field 370.7 cy Stone I SALEM ST Type/1 24-hr 10YR Rainfall=4.80" Prepared by{enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 66 Pond EXFIL: CHAMBERS Hydrograph 1 .78 cfS E Inflow Inflow Area=0.685 ac outflow EM Discarded Peak Elev=102.04' Primary Storage=1,750 cf 3 1_ o u. 0.19 Cfs 0 u :: u r :aas',a a:r ga a e a spa a e < sz ups a3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1617181920 Time (hours) SALEM ST Type/1 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 67 Summary for Pond OUTFLOW: prop ne Inflow Area = 2.032 ac, 7.49% Impervious, Inflow Depth > 0.60" for 10YR event Inflow = 1.60 cfs @ 12.06 hrs, Volume= 0.102 of Primary = 1.60 cfs @ 12.06 hrs, Volume= 0.102 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Pond OUTFLOW: prop ne Hydrograph Inflow Inflow r = . 3 1 .60 cfs Primary 0 LL 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type //24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 68 Summary for Pond POND: dpond Inflow Area = 0.330 ac, 0.00% Impervious, Inflow Depth > 0.86" for 10YR event Inflow = 0.48 cfs @ 12.00 hrs, Volume= 0.024 of Outflow = 0.08 cfs @ 12.36 hrs, Volume= 0.024 af, Atten= 83%, Lag= 21.0 min Discarded = 0.08 cfs @ 12.36 hrs, Volume= 0.024 of Primary = 0.00 cfs @ 1.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 118.83' @ 12.36 hrs Surf.Area= 891 sf Storage= 277 cf Plug-Flow detention time= 24.7 min calculated for 0.024 of(100% of inflow) Center-of-Mass det. time= 24.1 min ( 854.1 -830.0 ) Volume Invert Avail.Storage Storage Description #1 118.50' 1,593 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 118.50 764 0 0 119.00 953 429 429 120.00 1,374 1,164 1,593 Device Routing Invert Outlet Devices #1 Discarded 118.50' 4.000 in/hr Exfiltration over Surface area #2 Primary 119.50' 10.0' long x 3.0' 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 4.00 4.50 Coef. (English) 2.44 2.58 2.68 2.67 2.65 2.64 2.64 2.68 2.68 2.72 2.81 2.92 2.97 3.07 3.32 Discarded OutFlow Max=0.08 cfs @ 12.36 hrs HW=118.83' (Free Discharge) 't-1=Exfiltration (Exfiltration Controls 0.08 cfs) Primary OutFlow Max=0.00 cfs @ 1.00 hrs HW=118.50' (Free Discharge) L2=Broad-Crested Rectangular Weir( Controls 0.00 cfs) S/ALEM ST Type 1124-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 69 Pond POND: dpond yrcraph - 0.48 Cfs inflow Inflow/Area=0.330 ac - . OutflowDiscardFA ed 0.5= Peak Elev=118.83' Primary 0.45= Storage=277 cf 0.4 N 0.35- 0.3 - 0 0.25= - _ m �- 0.2- - 0.15-= 0.08 ds 0.1-- 0.00 Cfs µ � Q , , 1 2 3 4 5 6 7 8 9 10 11 1213 14 15 16 1718 19 20 Time (hours) SALEM ST Type 11 24-hr 10YR Rainfall=4.80" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 70 Summary for Link 7L: prop salem st Inflow Area = 1.010 ac, 6.47% Impervious, Inflow Depth > 0.42" for 10YR event Inflow = 0.70 cfs @ 12.01 hrs, Volume= 0.035 of Primary = 0.70 cfs @ 12.01 hrs, Volume= 0.035 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Link 7L: prop salem st Hydro graph m - Inflow Inflow Area=1.01 0.70 cfs - - - Primary 0.7- . t ; 0.6 : -- 0.5 cn 0.4- o 0.1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type/1 24-hr 25YR Rainfall=6.00" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 71 Time span=1.00-20.00 hrs, dt=0.05 hrs, 381 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method SubcatchmentA-1: EX salem st Runoff Area=37,454 sf 0.00% Impervious Runoff Depth>1.35" Flow Length=267' Tc=9.0 min CN=55 Runoff=1.93 cfs 0.097 of SubcatchmentA-2: EX NE Runoff Area=92,701 sf 0.00% Impervious Runoff Depth>1.35" Flow Length=540' Slope=0.0644'/' Tc=14.1 min CN=55 Runoff=3.89 cfs 0.239 of SubcatchmentA-3: EX se Runoff Area=14,047 sf 0.00% Impervious Runoff Depth>1.35" Flow Length=172' Slope=0.1511 T Tc=6.5 min CN=55 Runoff=0.81 cfs 0.036 of SubcatchmentA-4: EX nw Runoff Area=56,994 sf 0.00% Impervious Runoff Depth>1.35" Flow Length=272' Slope=0.0808 '/' Tc=9.6 min CN=55 Runoff=2.85 cfs 0.147 of SubcatchmentA-5: internal Runoff Area=11,128 sf 0.00% Impervious Runoff Depth>1.35" Flow Length=166' Slope=0.1206 '/' Tc=7.1 min CN=55 Runoff=0.62 cfs 0.029 of SubcatchmentP-1A: PROPOSED Runoff Area=4,166 sf 0.00% Impervious Runoff Depth>1.59" Flow Length=150' Tc=6.3 min CN=58 Runoff=0.29 cfs 0.013 of SubcatchmentP-1 B1: proposed Runoff Area=16,710 sf 0.00% Impervious Runoff Depth>1.48" Flow Length=230' Tc=8.5 min CN=57 Runoff=0.98 cfs 0.047 of SubcatchmentP-1 B2: proposed Runoff Area=14,384 sf 0.00% Impervious Runoff Depth>1.47" Flow Length=71' Slope=0.1400 7' Tc=7.5 min CN=57 Runoff=0.87 cfs 0.040 of SubcatchmentP-IC: DRIVELOT1 Runoff Area=8,714 sf 32.64% Impervious Runoff Depth>2.86" Flow Length=50' Slope=0.3300 '/' Tc=0.4 min CN=73 Runoff=1.26 cfs 0.048 of SubcatchmentP-2A: PROPOSED Runoff Area=12,162 sf 0.00% Impervious Runoff Depth>1.49" Flow Length=130' Slope=0.1090 '/' Tc=7.0 min CN=57 Runoff=0.76 cfs 0.035 of SubcatchmentP-2B: PROPOSED Runoff Area=46,507 sf 0.00% Impervious Runoff Depth>1.55" Flow Length=423' Tc=13.2 min CN=58 Runoff=2.39 cfs 0.138 of Subcatchment P-2C: (new Subcat) Runoff Area=29,848 sf 22.22% Impervious Runoff Depth>2.50" Flow Length=397' Tc=11.6 min CN=69 Runoff=2.69 cfs 0.143 of SubcatchmentP-3: PROPOSED Runoff Area=6,115 sf 0.00% Impervious Runoff Depth>1.35" Flow Length=250' Slope=0.1200 7' Tc=7.9 min CN=55 Runoff=0.33 cfs 0.016 of SubcatchmentP-4: prop nw Runoff Area=39,341 sf 0.00% Impervious Runoff Depth>1.49" Flow Length=351' Slope=0.0764'/' Tc=10.8 min CN=57 Runoff=2.11 cfs 0.112 of SubcatchmentP-5: internal Runoff Area=10,767 sf 0.00% Impervious Runoff Depth>1.69" Flow Length=116' Slope=0.1206 '/' Tc=6.6 min CN=59 Runoff=0.78 cfs 0.035 of SubcatchmentP3A: LOT3DRIVE Runoff Area=3,045 sf 100.00% Impervious Runoff Depth>5.47" Flow Length=100' Slope=0.1500 '/' Tc=0.5 min CN=98 Runoff=0.67 cfs 0.032 of SALEM ST Type/1 24-hr 25YR Rainfall=6.00" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 72 Reach 8R: (new Reach) Avg. Depth=0.00' Max Vet=0.00 fps Inflow=0.00 cfs 0.000 of n=0.022 L=100.0' S=0.1700'/' Capacity=13.88 cfs Outflow=0.00 cfs 0.000 of Reach 1 OR: COVERT Avg. Depth=0.19' Max Vet=4.16 fps Inflow=2.39 cfs 0.138 of 36.0"x 12.0" Box Pipe n=0.009 L=73.0' S=0.0068 '/' Capacity=21.32 cfs Outflow=2.36 cfs 0.137 of Pond 2P: prop se Inflow=0.33 cfs 0.016 of Primary=0.33 cfs 0.016 of Pond 3P: CHAMBERS Peak EIev=102.40' Storage=0.012 of Inflow=0.67 cfs 0.032 of Discarded=0.06 cfs 0.032 of Primary=0.00 cfs 0.000 of Outflow=0.06 cfs 0.032 of Pond 9P: CHAMBERS Peak EIev=102.91' Storage=0.022 of Inflow=1.26 cfs 0.048 of Discarded=0.08 cfs 0.047 of Primary=0.00 cfs 0.000 of Outflow=0.08 cfs 0.047 of Pond EXFIL: CHAMBERS Peak EIev=103.02' Storage=2,910 cf Inflow=2.69 cfs 0.143 of Discarded=0.23 cfs 0.136 of Primary=0.00 cfs 0.000 of Outflow=0.23 cfs 0.136 of Pond OUTFLOW:prop ne Inflow=2.90 cfs 0.172 of Primary=2.90 cfs 0.172 of Pond POND: dpond Peak EIev=119.22' Storage=645 cf Inflow=0.87 cfs 0.040 of Discarded=0.10 cfs 0.040 of Primary=0.00 cfs 0.000 of Outflow=0.10 cfs 0.040 of Link 7L: prop Salem st Inflow=1.25 cfs 0.060 of Primary=1.25 cfs 0.060 of Total Runoff Area= 9.276 ac Runoff Volume = 1.205 of Average Runoff Depth = 1.56" 96.90% Pervious = 8.989 ac 3.10% Impervious = 0.287 ac SALEM ST Type 1124-hr 25YR Rainfall=6.00" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 73 Summary for Subcatchment A-1: EX salem st Runoff = 1.93 cfs @ 12.02 hrs, Volume= 0.097 af, Depth> 1.35" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 25YR Rainfall=6.00" Area (sf) CN Description 37,454 55 Woods, Good, HSG B 37,454 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.5 50 0.1000 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 2.5 217 0.0830 1.44 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 9.0 267 Total Subcatchment A-1: EX Salem st y ro r ph 1 .93 cfs Runoff 2- Type 11 4-hr 25YR ainfal1=6.00°' Runoff Area=37, 54 sf Runoff Volume=0. 97 of Runoff Depth>1'.35" - 0 1 Flow Length=267' Tc=9.0 min =55 0-� e , 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 1920 Time (hours) SALEM ST Type/1 24-hr 25YR Rainfall=6.00" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 74 Summary for Subcatchment A-2: EX NE Runoff = 3.89 cfs @ 12.08 hrs, Volume= 0.239 af, Depth> 1.35" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 25YR Rainfall=6.00" Area (sf) CN Description 92,701 55 Woods, Good HSG B 92,701 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.7 50 0.0644 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 6.4 490 0.0644 1.27 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 14.1 540 Total Subcatchment A-2: EX NE Hydrograph 3.89 cfs Runoff 4- - Type II 24-hr 25YR Rainfall' 6.00 Runoff Area=92,701, sf -3- - Runoff Volume=0.239 of Runoff Depth>1.35 0 Flow L 2 9 40� � �n th-, , -- Slope=0.0644: / Tc=1'�4.1 min 1 - CN=55 0 s 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 1920 Time (hours) SALEM ST Type/1 24-hr 25YR Rainfall=6.00" Prepared by {enter your company name here) Printed 4/10/2017 HydroCAD®9 00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Pape 75 Summary for Subcatchment A-3: EX se Runoff = 0.81 cfs @ 11.99 hrs, Volume= 0.036 af, Depth> 1.35" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 25YR Rainfall=6.00" Area (sf) CN Description 14,047 55 Woods, Good, HSG B 14,047 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.5 50 0.1511 0.15 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 1.0 122 0.1511 1.94 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 6.5 172 Total Subcatchment A-3: EX se Hydrograph 0.9 0.81 cfs Laanoff 0.8. Type 11 24-hr 25YR Ra nfall=6..00 _ 0.7- Runoff Area=14, _ - 047, sf _ - 0.6= Runoff Volume=0.036 of 0.5_ Runoff Depth>1.35" Flow Length=172' 6 0.4 _ Slope=0.1511 0.3-- Tc=6.5 min C =55 0.2 0.1 0� < �. _ 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type //24-hr 25YR Rainfall=6.00" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 76 Summary for Subcatchment A-4: EX nw Runoff = 2.85 cfs @ 12.03 hrs, Volume= 0.147 af, Depth> 1.35" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 25YR Rainfall=6.00" Area (sf) CN Description 56,994 55 Woods, Good, HSG B 56,994 100.00% Pervious Area Tc Length Slope Velocity Capacity Description -(min) (feet) (fUft) (ft/sec) (cfs) 7.0 50 0.0808 0.12 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 2.6 222 0.0808 1.42 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 9.6 272 Total Subcatchment A-4: EX nw y ro rig 2.85 Cfs - - - Runoff 3- Type II 24-hr 25YR Rainfall=6.00'° Runoff Area=56,994 sf Runoff Del th>1.3®147 of 2- Runoff - ` - p 5, Flow Length=272' Slope=0.0808 1 Tc=9.6 min - C' =55 O`g 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 1920 Time (hours) SALEM ST Type 1124-hr 25YR Rainfall=6.00" Prepared by {enter your company name here) Printed 4/10/2017 HydroCADO 9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 77 Summary for Subcatchment A-5: internal Runoff = 0.62 cfs @ 12.00 hrs, Volume= 0.029 af, Depth> 1.35" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 25YR Rainfall=6.00" Area (sf) CN Description 11,128 55 Woods, Good, HSG B 11,128 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (fUsec) (cfs) 6.0 50 0.1206 0.14 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 1.1 116 0.1206 1.74 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 7.1 166 Total Subcatchment A-5: internal Hydro graph 0.62 cfs Runoff 0.65_ yp 11 24-hr 25Y 0.6 T e �R 0.55 Rai nfall 6, 0 0.5 Runoff Area=11,� 28 sf � 0.45: Runoff Volume=0.029 of v 0.4 Runoff Depth>1.35" 0.35 0 Flow_Length=166' 3 o . - Slopa=0.1206 '/' _ `- 0.25 Tc=7.1 min 0.2 = -CN=55 0.15- � 0.1 0.05 0 , 1 2 3 4 5 6 7 8 9 1011 121314151617181920 Time (hours) SALEM ST Type 1124-hr 25YR Rainfall=6.00" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 78 Summary for Subcatchment P-1A: PROPOSED Runoff = 0.29 cfs @ 11.98 hrs, Volume= 0.013 af, Depth> 1.59" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 25YR Rainfall=6.00" Area (sf) CN Description 2,208 61 >75% Grass cover, Good, HSG B 1,958 55 Woods, Good, HSG B 4,166 58 Weighted Average 4,166 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 4.3 50 0.0400 0.20 Sheet Flow, Grass: Short n= 0.150 P2= 3.22" 2.0 100 0.0140 0.83 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 6.3 150 Total Subcatchent P-1A: PROPOSED Hydrograph 0.3- 0.29 cfs - Runoff Type II 24-hr 25YR Rainfall=6.00 0.25- Runoff Area= - ,166 sf Runoff Volume=0.013 of 0.2 _ Runoff Depth>1.'59" 0 0.15-� Flow Length=150' S Tc=6.3 min 0.1 CN=58 0.05_ Q �, _ g., 1 2 3 4 5 6 7 8 9 10 11 12 1314151617181920 Time (hours) SALEM ST Type/1 24-hr 25YR Rainfall=6.00" Prepared by {enter your company name here) Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 79 Summary for Subcatchment P-1 B1: proposed Runoff = 0.98 cfs @ 12.01 hrs, Volume= 0.047 af, Depth> 1.48" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type 11 24-hr 25YR Rainfall=6.00" Area (sf) CN Description 11,854 55 Woods, Good, HSG B 4,856 61 >75% Grass cover, Good, HSG B 16,710 57 Weighted Average 16,710 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.5 50 0.1000 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 0.9 52 0.0400 1.00 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 1.2 128 0.1250 1.77 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 8.5 230 Total Subcatchment P-1 B1: proposed dro ra h 0.98 cfs Runoff 1 Type II 24-hr 25YR Rainfal'1=6.0 " Runoff unoff Area=1 ,71,0 sf '., Runoff lu a=0.047 of Runoff,Depth>1. " o Flow Length= 3 ' c=8.5 min =57 0- 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 1920 Time (hours) SALEM ST Type/1 24-hr 25YR Rainfall=6.00" Prepared by {enter your company name here} Printed 4/10/2017 HvdroCAD®9.00 s/n 01057 ©2009 HvdroCAD Software Solutions LLC Page 80 Summary for Subcatchment P-1 B2: proposed Runoff = 0.87 cfs @ 12.00 hrs, Volume= 0.040 af, Depth> 1.47" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 25YR Rainfall=6.00" Area (sf) CN Description 10,623 55 Woods, Good, HSG B 3,761 61 >75% Grass cover, Good, HSG B 14,384 57 Weighted Average 14,384 100.00% Pervious Area Tc Length Slope Velocity Capacity Description -(min) (feet) Oft) (fUsec) (cfs) 7.5 71 0.1400 0.16 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" Subcatchment P-1 B2: proposed ydrorap 0.87 ds - Runoff 0.9= Type hr_25YR T e 1124- 0.8= Rainfall=6;00" 0.7 _ Runoff Area=14,384 sf Volu Runoff 0.040 of me-= - -- 0.6_ Runoff'Depth>1.47" - -- 0.5- Flow Length=71 , ° Slope=0.1400 '/' ,� 0.4_ . _ T&7.5 min - - 0.3-: =,. C'N=57 0.2 0.1 0 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type 1124-hr 25YR Rainfall=6.00" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 81 Summary for Subcatchment P-1 C: DRIVELOT1 Runoff = 1.26 cfs @ 11.90 hrs, Volume= 0.048 af, Depth> 2.86" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 25YR Rainfall=6.00" Area (sf) CN Description 2,844 98 Paved parking, HSG B 5,870 61 >75% Grass cover, Good, HSG B 8,714 73 Weighted Average 5,870 67.36% Pervious Area 2,844 32.64% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.4 50 0.3300 2.12 Sheet Flow, n= 0.022 P2= 3.22" Subcatchment P-1 C: DIVELOT1 y rorapl 1 .26 cfs Runoff Type II 24-hr 25YR Rainfall=6.,00" 1 Runoff-Area=B 714 sf Runoff Volume=0.048 of Runoff Depth>2.86" Flow Length=50'' Slope=0.3300 '/' Tc=0.4 min C'N=73 i g, a . 1 2 3 4 5 6 7 8 9 1011 12 13 1415 1617 18 1920 Time (hours) SALEM ST Type 1124-hr 25YR Rainfall=6.00" Prepared by{enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 82 Summary for Subcatchment P-2A: PROPOSED Runoff = 0.76 cfs @ 11.99 hrs, Volume= 0.035 af, Depth> 1.49" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 25YR Rainfall=6.00" Area (sf) CN Description 3,787 61 >75% Grass cover, Good, HSG B 8,375 55 Woods, Good, HSG B 12,162 57 Weighted Average 12,162 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.2 50 0.1090 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 0.8 80 0.1090 1.65 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 7.0 130 Total Subcatchment P-2A: PROPOSED Hydro graph 0.8-- 0.7 6 CfS' Runoff Type_LI 24-hr25YR 0.7- Rainfall=6,00"' 0.6 RunoffArea=12,'162 sf - - -- 0.0.35 af_ - Runoff Volume 0.5 Runoff D epth 1.'49" Flow Len th=130° 0 0.4- g _SJop.e=0.1090_'/' , 0.3 Tc=7.0 min CN=57 - 0.1 ot 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type 1124-hr 25YR Rainfall=6.00" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 83 Summary for Subcatchment -2 : PROPOSED Runoff = 2.39 cfs @ 12.06 hrs, Volume= 0.138 af, Depth> 1.55" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 25YR Rainfall=6.00" Area (sf) CN Description 25,775 55 Woods, Good, HSG B 20,732 61 >75% Grass cover, Good, HSG B 46,507 58 Weighted Average 46,507 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.9 50 0.0600 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 0.9 109 0.1800 2.12 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 2.6 134 0.0150 0.86 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 1.8 130 0.0300 1.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 13.2 423 Total Subcatchment P-2B: PROPOSED Hydro graph 2.39 cfs Runoff Type 11 24-hr 25Y Raihfall=6.00" 2 Runoff Area-46,507 sf Runoff Volume--0.138 of Runoff epth>1,.55" o Flow_Length=423' Tc=13.2 min CN=58 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 1920 Time (hours) SALEM ST Type/1 24-hr 25YR Rainfall=6.00" Prepared by{enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 84 Summary for Subcatchment P-2C: (new Subcat) Runoff = 2.69 cfs @ 12.04 hrs, Volume= 0.143 af, Depth> 2.50" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 25YR Rainfall=6.00" Area (sf) CN Description 23,215 61 >75% Grass cover, Good, HSG B 6,633 98 Paved parking, HSG B 29,848 69 Weighted Average 23,215 77.78% Pervious Area 6,633 22.22% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) Oft) (fUsec) (cfs) 7.4 50 0.0100 0.11 Sheet Flow, Grass: Short n= 0.150 P2= 3.22" 2.8 137 0.0140 0.83 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 1.4 210 0.1200 2.42 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 11.6 397 Total Subcatchment P-2C: (new Subcat) Hydrograph 3- 2.69 cfs' Runoff Type 11 24-hr'25YR Rainfa[1=6.00'° Runoff'Area=29,848 sf - -- 2 Runoff'Volu a=0.143 of Runoff!Depth>2.5 " o Flow Length=397' �._ c=11.6 min =69 0— , sk77, 1 2 3 4 5 6 7 8 9 1011 12 131415 161718 1920 Time (hours) SALEM ST Type // 24-hr 25YR Rainfall=6.00" Prepared by {enter your company name here) Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 85 Summary for Subcatchment P-3: PROPOSED Runoff = 0.33 cfs @ 12.01 hrs, Volume= 0.016 af, Depth> 1.35" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 25YR Rainfall=6.00" Area (sf) CN Description 6,115 55 Woods Good HSG B 6,115 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 50 0.1200 0.14 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 1.9 200 0.1200 1.73 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 7.9 250 Total Subcatchment P-3: PROPOSED Hydro graph e 0.33 cfs 0.35 Runoff Type II 24-hr 25YR y 0.3- Rain fall=600" Runoff Area=6,115 Sf 0.25 Runoff Volume=0.016 of v 0.2-: Runoff Depth>1.35" r Flow Length=250' 0.15 slope=o.1200 'i' Tc=7.9 min 0.1 C'N=55 0.05 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type/1 24-hr 25YR Rainfall=6.00" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Paae 86 Summary for Subcatchment P-4: prop nw Runoff = 2.11 cfs @ 12.04 hrs, Volume= 0.112 af, Depth> 1.49" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 25YR Rainfall=6.00" Area (sf) CN Description 12,424 61 >75% Grass cover, Good, HSG B 26,917 55 Woods, Good, HSG B 39,341 57 Weighted Average 39,341 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.2 50 0.0764 0.12 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 3.6 301 0.0764 1.38 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 10.8 351 Total Subcatchent P-4: prop nw Hydro graph 2.11' CfS 0 Runoff 2 Type II 24-hr,25YR Rainfall 6.,00" Runoff Area=39,341 Sf Runoff Volume=0.112 of v Runoff Depth>1.49 Flow Length=351' Slope=0.0764 '/' Tc=10.8 min C'N=57 0-LAMM 1 2 3J 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type/1 24-hr 25YR Rainfall=6.00" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 87 Summary for Subcatchment P-5: internal Runoff = 0.78 cfs @ 11.99 hrs, Volume= 0.035 af, Depth> 1.69" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 25YR Rainfall=6.00" Area (sf) CN Description 8,014 61 >75% Grass cover, Good, HSG B 2,753 55 Woods Good, HSG B 10,767 59 Weighted Average 10,767 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (fUsec) (cfs) 6.0 50 0.1206 0.14 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 0.6 66 0.1206 1.74 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 6.6 116 Total Subcatchment P-5: internal Idro ra I 9:78 cfs Runoff 0.8- Type 11 24-hr 25YR 0.7 Rainfall=600" Runoff Area=10,767 sf - 0.6 Run _ off Volume=0.035 of 0.5 Runoff Depth>1.69" Flow Length=116' 0 0.4 U. - Slope=0.1206 '/' .% 0.3 Tc=6.6 min 0.2® CN=59 0.1- 0 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type 1124-hr 25YR Rainfall=6.00" Prepared by {enter your company name here) Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 88 Summary for Subcatchment 3A: LOT3DIVE Runoff = 0.67 cfs @ 11.89 hrs, Volume= 0.032 af, Depth> 5.47" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type 11 24-hr 25YR Rainfall=6.00" Area (sf) CN Description 3,045 98 Paved parking, HSG B 3,045 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.5 100 0.1500 3.09 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.22" Subcatchment 133A: LOT3DRIVE Hydro graph 0.75 w 0.67 cfs Runoff 0.7 0.65 a Type 25YR -T ell 24-h r 0.6= Rainfall=6.00 r - Runoff Area=3,045 Sf ' 0.55- R ; 0.5 .E R V 0.45= Runoff Volurne=0.032 of I 0.4 Runoff Dep th>5.47 - 0 0.35 Flow Len th=100' - Slo e� e - 0.3- p -0.1500 / Tc=0.5 min 0.25�� ; 0.2 C:N=98 0.15 0.1 - 0.05- 0 1 2 3 4 5 6 7 8 9 1011 12 1314151617 18 19 20 Time (hours) SALEM ST Type // 24-hr 25YR Rainfall=6.00" Prepared by {enter your company name here) Printed 4/10/2017 HydroCADO 9 00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 89 Summary for Reach 8R: (new Reach) Inflow Area = 0.330 ac, 0.00% Impervious, Inflow Depth = 0.00" for 25YR event Inflow = 0.00 cfs @ 1.00 hrs, Volume= 0.000 of Outflow = 0.00 cfs @ 1.00 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 0.00 fps, Min. Travel Time= 0.0 min Avg. Velocity = 0.00 fps, Avg. Travel Time= 0.0 min Peak Storage= 0 cf @ 1.00 hrs, Average Depth at Peak Storage= 0.00' Bank-Full Depth= 0.60', Capacity at Bank-Full= 13.88 cfs 2.50' x 0.60' deep Parabolic Channel, n= 0.022 Length= 100.0' Slope= 0.1700 '/' Inlet Invert= 119.00', Outlet Invert= 102.00' Reach 8R: (new Reach) Hydrograph 13 Inflow 1El Outflow Inflow Area=0.330 ac Avg. Depth=0.0 ' Max Vel=O.OG fps N n 0.022 v L=100.0' 0 .1700 T ciy=13. 8 cfs 0.00 cfs MW 0- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type/1 24-hr 25YR Rainfall=6.00" Prepared by{enter your company name here) Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 90 Summary for Reach 1OR: COVERT Inflow Area = 1.068 ac, 0.00% Impervious, Inflow Depth > 1.55" for 25YR event Inflow = 2.39 cfs @ 12.06 hrs, Volume= 0.138 of Outflow = 2.36 cfs @ 12.07 hrs, Volume= 0.137 af, Atten= 1%, Lag= 0.5 min Routing by Stor-Ind+Trans method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 4.16 fps, Min. Travel Time= 0.3 min Avg. Velocity = 1.36 fps, Avg. Travel Time= 0.9 min Peak Storage= 42 cf @ 12.07 hrs, Average Depth at Peak Storage= 0.19' Bank-Full Depth= 1.00', Capacity at Bank-Full= 21.32 cfs 36.0"W x 12.0" H Box Pipe n= 0.009 Length= 73.0' Slope= 0.0068 7' Inlet Invert= 117.50', Outlet Invert= 117.00' Reach 10R: CUVERT y lro raph LMInflowjInflow Area=1.068 ac .36 CfS tflo Avg: Depth=0.19' -- 2-, Max Ve1=4.16 fps f 36.0" x'12.0°' f v B;ox,Pipe n=0.009 o L=73.0' f v S=0.0068 '/° Capacity=21.32 cfs 0-14 1 2 3 4 5 6 7 8 9 10 11 12 1314151617181920 Time (hours) SALEM ST Type/1 24-hr 25YR Rainfall=6.00" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 91 Summary for Pond 2P: prop se Inflow Area = 0.210 ac, 33.24% Impervious, Inflow Depth > 0.90" for 25YR event Inflow = 0.33 cfs @ 12.01 hrs, Volume= 0.016 of Primary = 0.33 cfs @ 12.01 hrs, Volume= 0.016 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Pond 2P: prop se Hydrograph Inflow 0.33 CfS El Primary 0.35_ Inflbw Area=0.21 r 0.3- 0.25- a == 0.2= " i 0.15- 0.1 0.05_ s o 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 181920 Time (hours) SALEM ST Type 1124-hr 25YR Rainfall=6.00" Prepared by {enter your company name here) Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 92 Summary for Pond 3P: CHAMBERS Inflow Area = 0.070 ac,100.00% Impervious, Inflow Depth > 5.47" for 25YR event Inflow = 0.67 cfs @ 11.89 hrs, Volume= 0.032 of Outflow = 0.06 cfs @ 12.25 hrs, Volume= 0.032 af, Atten= 91%, Lag= 21.5 min Discarded = 0.06 cfs @ 12.25 hrs, Volume= 0.032 of Primary = 0.00 cfs @ 1.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 102.40' @ 12.25 hrs Suri.Area= 0.015 ac Storage= 0.012 of Plug-Flow detention time= 69.3 min calculated for 0.032 of(100% of inflow) Center-of-Mass det. time= 69.0 min ( 774.7 - 705.7 ) Volume Invert Avail.Storage Storage Description #1A 100.00, 0.012 of 3.83'W x 72.20'L x 2.83'H Field A Z=1.0 0.033 of Overall - 0.003 of Embedded = 0.029 of x 40.0%Voids #2A 101.00, 0.003 of StormTech SC-310 x 10 Inside#1 Effective Size= 28.9"W x 16.0"H => 2.07 sf x 7.12'L = 14.7 cf Overall Size= 34.0"W x 16.0"H x 7.56'L with 0.44' Overlap 0.015 of Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Discarded 100.00' 4.000 in/hr Exfiltration over Surface area #2 Primary 102.83' 6.0" Horiz. Orifice/Grate X 10.00 C= 0.600 Limited to weir flow at low heads Qiscarded OutFlow Max=0.06 cfs @ 12.25 hrs HW=102.40' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.06 cfs) Primary OutFlow Max=0.00 cfs @ 1.00 hrs HW=100.00' (Free Discharge) 't-2=Orifice/Grate ( Controls 0.00 cfs) SALEM ST Type 1124-hr 25YR Rainfall=6.00" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 93 Pond 3P: CHAMBERS - Chamber Wizard Field A Chamber Model=StormTech SC-310 Effective Size= 28.9"W x 16.0"H => 2.07 sf x 7.12'L = 14.7 cf Overall Size= 34.0"W x 16.0"H x 7.56'L with 0.44' Overlap 34.0" Wide + 0.0" Spacing = 34.0" C-C 10 Chambers/Row x 7.12' Long = 71.20' + 6.0" End Stone x 2 = 72.20' Base Length 1 Rows x 34.0" Wide + 6.0" Side Stone x 2 = 3.83' Base Width 12.0" Base + 16.0" Chamber Height + 6.0" Cover= 2.83' Field Height 1.0 '/' Side-Z x Height= 34.0" Flare/Side Base Length + Flare x 2 = 77.87' Top Length Base Width + Flare x 2 = 9.50' Top Length 10 Chambers x 14.7 cf= 147.4 cf Chamber Storage 1,424.9 cf Field - 147.4 cf Chambers = 1,277.5 cf Stone x 40.0%Voids = 511.0 cf Stone Storage Stone + Chamber Storage = 658.4 cf= 0.015 of 10 Chambers 52.8 cy Field 47.3 cy Stone r� `r 0 SALEM ST Type 1124-hr 25YR Rainfall=6.00" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 94 Pond 3P: CHAMBERS ydro ra h 0.67 Cfs- Inflow El Outflow Inflow Area=0.070 ac lfDiscarded 0.7- Peak Elev=102.40' El Primary 0.6 ' Stor age of - 0.5 �- 0.4_ 3 .2 0.3- 0.2_ 0.06 cfs U"garoga 1 2 3 4 5 6 7 8 9 10 11 1213 14 15 16 1718 19 20 Time (hours) SALEM ST Type // 24-hr 25YR Rainfall=6.00" Prepared by{enter your company name here} Printed 4/10/2017 HydroCAD09 00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 95 Summary for Pond 9P: CHAMBERS Inflow Area = 0.200 ac, 32.64% Impervious, Inflow Depth > 2.86" for 25YR event Inflow = 1.26 cfs @ 11.90 hrs, Volume= 0.048 of Outflow = 0.08 cfs @ 12.52 hrs, Volume= 0.047 af, Atten= 94%, Lag= 37.2 min Discarded = 0.08 cfs @ 12.52 hrs, Volume= 0.047 of Primary = 0.00 cfs @ 1.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 102.91' @ 12.52 hrs Surf.Area= 0.020 ac Storage= 0.022 of Plug-Flow detention time= 130.4 min calculated for 0.047 of(98% of inflow) Center-of-Mass det. time= 123.3 min ( 905.0 - 781.7 ) Volume Invert Avail Storage Storage Description #1A 100.00, 0.022 of 5.25'W x 72.201 x 4.00'H Field A Z=1.0 0.065 of Overall - 0.011 of Embedded = 0.055 of x 40.0%Voids #2A 101.00, 0.011 of StormTech SC-740 x 10 Inside#1 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.121 = 45.9 of Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap 0.032 of Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Discarded 100.00' 4.000 in/hr Exfiltration over Surface area #2 Primary 104.00' 6.0" Horiz. Orifice/Grate X 10.00 C= 0.600 Limited to weir flow at low heads Qiscarded OutFlow Max=0.08 cfs @ 12.52 hrs HW=102.90' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.08 cfs) Primary OutFlow Max=0.00 cfs @ 1.00 hrs HW=100.00' (Free Discharge) 't-2=Orifice/Grate ( Controls 0.00 cfs) SALEM ST Type/1 24-hr 25YR Rainfall=6.00" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 96 Pond 9P: CHAMBERS - Chamber Wizard Field A Chamber Model= StormTech SC-740 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap 51.0" Wide + 0.0" Spacing = 51.0" C-C 10 Chambers/Row x 7.12' Long = 71.20' + 6.0" End Stone x 2 = 72.20' Base Length 1 Rows x 51.0" Wide + 6.0" Side Stone x 2 = 5.25' Base Width 12.0" Base + 30.0" Chamber Height+ 6.0" Cover= 4.00' Field Height 1.0 '/' Side-Z x Height =48.0" Flare/Side Base Length + Flare x 2 = 80.20' Top Length Base Width + Flare x 2 = 13.25' Top Length 10 Chambers x 45.9 cf=459.4 cf Chamber Storage 2,840.7 cf Field -459.4 cf Chambers = 2,381.3 cf Stone x 40.0% Voids = 952.5 cf Stone Storage Stone + Chamber Storage = 1,411.9 cf= 0.032 of 10 Chambers 105.2 cy Field 88.2 cy Stone .......... r SALEM ST Type 1124-hr 25YR Rainfall=6.00" Prepared by {enter your company name here) Printed 4/10/2017 HydroCAD09 00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 97 Pond 9P: CHAMBERS ydrra h 1 .26 CfS Inflow El Outflow Inflow rea=0.200 ac Discarded Peak Elev=1 2.91' 0 Primary Storage= . 2 of 0 LL 0.08 Cfs ' r : 0- 1 2 3 4 5 6 7 8 9 1011121314151617181920 Time (hours) SALEM ST Type 1124-hr 25YR Rainfall=6.00" Prepared by{enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 98 Summary for Pond EXFIL: CHAMBERS Inflow Area = 0.685 ac, 22.22% Impervious, Inflow Depth > 2.50" for 25YR event Inflow = 2.69 cfs @ 12.04 hrs, Volume= 0.143 of Outflow = 0.23 cfs @ 12.84 hrs, Volume= 0.136 af, Atten= 92%, Lag= 48.4 min Discarded = 0.23 cfs @ 12.84 hrs, Volume= 0.136 of Primary = 0.00 cfs @ 1.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 103.02' @ 12.84 hrs Surf.Area= 2,460 sf Storage= 2,910 cf Plug-Flow detention time= 142.5 min calculated for 0.136 of(95% of inflow) Center-of-Mass det. time= 124.7 min ( 921.9 - 797.2 ) Volume Invert Avail.Storage Storage Description #1A 100.00, 4,003 cf 6.25'W x 194.24'L x 5.00'H Field A Z=1.0 11,249 cf Overall - 1,240 cf Embedded = 10,009 cf x 40.0% Voids #2A 101.00, 1,240 cf StormTech SC-740 x 27 Inside#1 Effective Size=44.6"W x 30.0"H => 6.45 sf x 7.12'L =45.9 cf Overall Size= 51.0"W x 30.0"H x 7 56'L with 0 44' Overlap 5,244 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Discarded 100.00' 4.000 in/hr Exfiltration over Surface area #2 Primary 104.33' 6.0" Horiz. Orifice/Grate X 44.00 C= 0.600 Limited to weir flow at low heads Discarded OutFlow Max=0.23 cfs @ 12.84 hrs HW=103.02' (Free Discharge) 't-1=Exfiltration (Exfiltration Controls 0.23 cfs) Primary OutFlow Max=0.00 cfs @ 1.00 hrs HW=100.00' (Free Discharge) 't-2=Orifi ce/G rate ( Controls 0.00 cfs) SALEM ST Type // 24-hr 25YR Rainfall=6.00" Prepared by {enter your company name here) Printed 4/10/2017 HydroCAD®9 00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 99 Pond EXFIL: CHAMBERS - Chamber Wizard Field Chamber Model= StormTech SC-740 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.121 = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.561 with 0.44' Overlap 51.0" Wide + 0.0" Spacing = 51.0" C-C 27 Chambers/Row x 7.12' Long = 192.24' + 12.0" End Stone x 2 = 194.24' Base Length 1 Rows x 51.0" Wide + 12.0" Side Stone x 2 = 6.25' Base Width 12.0" Base + 30.0" Chamber Height + 18.0" Cover= 5.00' Field Height 1.0 '/' Side-Z x Height = 60.0" Flare/Side Base Length + Flare x 2 = 204.24' Top Length Base Width + Flare x 2 = 16.25' Top Length 27 Chambers x 45.9 cf= 1,240.4 cf Chamber Storage 11,248.9 cf Field - 1,240.4 cf Chambers = 10,008.5 cf Stone x 40.0%Voids =4,003.4 cf Stone Storage Stone + Chamber Storage = 5,243.8 cf= 0.120 of 27 Chambers 416.6 cy Field 370.7 cy Stone r i 0 SALEM ST Type 1124-hr 25YR Rainfall=6.00" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 100 Pond EXFIL: CHAMBERS IyIrraa 2.69 Cfs 12 Inflow . Inflow rea=0685'ac 3_� Outflow EM Discarded Peak Elev=103.02 Primary - r, Storage=2,910 cf -2- 0 LLr , 1 0 23 cfs � 0.00 cfs ��. ������,��k Q 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1617181920 Time (hours) SALEM ST Type 11 24-hr 25YR Rainfall=6.00" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9 00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 101 Summary for Pond OUTFLOW: prop ne Inflow Area = 2.032 ac, 7.49% Impervious, Inflow Depth > 1.02" for 25YR event Inflow = 2.90 cfs @ 12.05 hrs, Volume= 0.172 of Primary = 2.90 cfs @ 12.05 hrs, Volume= 0.172 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Pond OUTFLOW: prop ne Hydro graph Inflow 2.90 CfS El Primary 3 w. Inflow Ar = . 3 v 2 U. 0" d a s9 gao< ,o�ae g r a o Q e 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type 1124-hr 25YR Rainfall=6.00" Prepared by{enter your company name here} Printed 4/10/2017 HydroCAD®9_.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Pa e 102 Summary for Pond POND: dpond Inflow Area = 0.330 ac, 0.00% Impervious, Inflow Depth > 1.47" for 25YR event Inflow = 0.87 cfs @ 12.00 hrs, Volume= 0.040 of Outflow = 0.10 cfs @ 12.54 hrs, Volume= 0.040 af, Atten= 89%, Lag= 32.7 min Discarded = 0.10 cfs @ 12.54 hrs, Volume= 0.040 of Primary = 0.00 cfs @ 1.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 119.22' @ 12.54 hrs Surf.Area= 1,044 sf Storage= 645 cf Plug-Flow detention time= 61.1 min calculated for 0.040 of(100% of inflow) Center-of-Mass det. time= 60.4 min ( 877.4 -817.0 ) Volume Invert Avail.Storage Storaqe Description #1 118.50' 1,593 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 118.50 764 0 0 119.00 953 429 429 120.00 1,374 1,164 1,593 Device Routing Invert Outlet Devices #1 Discarded 118.50' 4.000 in/hr Exfiltration over Surface area #2 Primary 119.50' 10.0' long x 3.0' 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 4.00 4.50 Coef. (English) 2.44 2.58 2.68 2.67 2.65 2.64 2.64 2.68 2.68 2.72 2.81 2.92 2.97 3.07 3.32 Discarded OutFlow Max=0.10 cfs @ 12.54 hrs HW=119.22' (Free Discharge) 't-1=Exfiltration (Exfiltration Controls 0.10 cfs) Primary OutFlow Max=0.00 cfs @ 1.00 hrs HW=118.50' (Free Discharge) L2=Broad-Crested Rectangular Weir( Controls 0.00 cfs) SALEM ST Type 1124-hr 25YR Rainfall=6.00" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 103 Pond POND: dpond Hydrograph 0.87 CfS 1! : - inflow Inflow_Area=0.330 ac FM Outflow FM Discarded 0.9- 1 Peak Elev=119.22' Primary 0 8- Storage=645 cf 0.7- m - w 0.5- 0 0.4 0.3 0.21- 0.10 CfS P 0.00 CfS { ; d' rOJWM�_, 3e fi° .a paaemgs a a _ aog a ua a r� .ge � 1 2 3 4 5 6 7 8 9 10 11 1213 14 15 16 1718 19 20 Time (hours) SALEM ST Type/1 24-hr 25YR Rainfall=6.00" Prepared by{enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 104 Summary for Link 7L: prop salem st Inflow Area = 1.010 ac, 6.47% Impervious, Inflow Depth > 0.71" for 25YR event Inflow = 1.25 cfs @ 12.00 hrs, Volume= 0.060 of Primary = 1.25 cfs @ 12.00 hrs, Volume= 0.060 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Link 7L: prop salem st Hydrograph Inflow Inflow Area=1.01 1 .25 cfs Primary i 3 tO 0-1W d9 �ktl 1 2 3 4 5 6 7 8 9 1011 1213 14 15 16 17 18 19 20 Time (hours) SALEM ST Type/1 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 105 Time span=1.00-20.00 hrs, dt=0.05 hrs, 381 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method SubcatchmentA-1: EX Salem st Runoff Area=37,454 sf 0.00% Impervious Runoff Depth>2.90" Flow Length=267' Tc=9.0 min CN=55 Runoff=4.30 cfs 0.208 of SubcatchmentA-2: EX NE Runoff Area=92,701 sf 0.00% Impervious Runoff Depth>2.90" Flow Length=540' Slope=0.0644'/' Tc=14.1 min CN=55 Runoff=8.83 cfs 0.514 of SubcatchmentA-3: EX se Runoff Area=14,047 sf 0.00% Impervious Runoff Depth>2.91" Flow Length=172' Slope=0.1511 T Tc=6.5 min CN=55 Runoff=1.77 cfs 0.078 of SubcatchmentA-4: EX nw Runoff Area=56,994 sf 0.00% Impervious Runoff Depth>2.90" Flow Length=272' Slope=0.0808 '/' Tc=9.6 min CN=55 Runoff=6.37 cfs 0.317 of SubcatchmentA-5: internal Runoff Area=11,128 sf 0.00% Impervious Runoff Depth>2.91" Flow Length=166' Slope=0.1206 '/' Tc=7.1 min CN=55 Runoff=1.38 cfs 0.062 of SubcatchmentP-1A: PROPOSED Runoff Area=4,166 sf 0.00% Impervious Runoff Depth>3.26" Flow Length=150' Tc=6.3 min CN=58 Runoff=0.59 cfs 0.026 of SubcatchmentP-1 B1: proposed Runoff Area=16,710 sf 0.00% Impervious Runoff Depth>3.10" Flow Length=230' Tc=8.5 min CN=57 Runoff=2.09 cfs 0.099 of SubcatchmentP-1 132: proposed Runoff Area=14,384 sf 0.00% Impervious Runoff Depth>3.08" Flow Length=71' Slope=0.1400 '/' Tc=7.5 min CN=57 Runoff=1.86 cfs 0.085 of SubcatchmentP-1C: DRIVELOT1 Runoff Area=8,714 sf 32.64% Impervious Runoff Depth>4.99" Flow Length=50' Slope=0.3300 '/' Tc=0.4 min CN=73 Runoff=2.13 cfs 0.083 of SubcatchmentP-2A: PROPOSED Runoff Area=12,162 sf 0.00% Impervious Runoff Depth>3.11" Flow Length=130' Slope=0.1090'/' Tc=7.0 min CN=57 Runoff=1.61 cfs 0.072 of SubcatchmentP-2B: PROPOSED Runoff Area=46,507 sf 0.00% Impervious Runoff Depth>3.20" Flow Length=423' Tc=13.2 min CN=58 Runoff=5.08 cfs 0.284 of Subcatchment P-2C: (new Subcat) Runoff Area=29,848 sf 22.22% Impervious Runoff Depth>4.52" Flow Length=397' Tc=11.6 min CN=69 Runoff=4.80 cfs 0.258 of SubcatchmentP-3: PROPOSED Runoff Area=6,115 sf 0.00% Impervious Runoff Depth>2.91" Flow Length=250' Slope=0.1200 T Tc=7.9 min CN=55 Runoff=0.73 cfs 0.034 of SubcatchmentP-4: prop nw Runoff Area=39,341 sf 0.00% Impervious Runoff Depth>3.11" Flow Length=351' Slope=0.0764'/' Tc=10.8 min CN=57 Runoff=4.53 cfs 0.234 of SubcatchmentP-5: internal Runoff Area=10,767 sf 0.00% Impervious Runoff Depth>3.41" Flow Length=116' Slope=0.1206'/' Tc=6.6 min CN=59 Runoff=1.58 cfs 0.070 of SubcatchmentP3A: LOT3DRIVE Runoff Area=3,045 sf 100.00% Impervious Runoff Depth>7.94" Flow Length=100' Slope=0.1500 '/' Tc=0.5 min CN=98 Runoff=0.96 cfs 0.046 of SALEM ST Type 11 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 106 Reach 8R: (new Reach) Avg. Depth=0.19' Max Vet=6.72 fps Inflow=1.08 cfs 0.019 of n=0.022 L=100.0' S=0.1700 '/' Capacity=13.88 cfs Outflow=1.14 cfs 0.019 of Reach 1 OR: CUVERT Avg. Depth=0.31' Max Vet=5.50 fps Inflow=5.08 cfs 0.284 of 36.0"x 12.0" Box Pipe n=0.009 L=73.0' S=0.0068 T Capacity=21.32 cfs Outflow=5.04 cfs 0.284 of Pond 2P: prop se Inflow=1.45 cfs 0.038 of Primary=1.45 cfs 0.038 of Pond 3P: CHAMBERS Peak EIev=102.90' Storage=0.015 of Inflow=0.96 cfs 0.046 of Discarded=0.07 cfs 0.042 of Primary=0.82 cfs 0.004 of Outflow=0.89 cfs 0.046 of Pond 9P: CHAMBERS Peak EIev=104.09' Storage=0.032 of Inflow=2.13 cfs 0.083 of Discarded=0.10 cfs 0.063 of Primary=1.05 cfs 0.011 of Outflow=1.15 cfs 0.074 of Pond EXFIL: CHAMBERS Peak EIev=104.38' Storage=4,454 cf Inflow=4.80 cfs 0.258 of Discarded=0.28 cfs 0.183 of Primary=2.72 cfs 0.036 of Outflow=3.00 cfs 0.219 of Pond OUTFLOW:prop ne Inflow=6.23 cfs 0.393 of Primary=6.23 cfs 0.393 of Pond POND: dpond Peak EIev=119.63' Storage=1,108 cf Inflow=1.86 cfs 0.085 of Discarded=0.11 cfs 0.066 of Primary=1.08 cfs 0.019 of Outflow=1.19 cfs 0.085 of Link 7L: prop salem st Inflow=3.66 cfs 0.155 of Primary=3.66 cfs 0.155 of Total Runoff Area= 9.276 ac Runoff Volume= 2.471 of Average Runoff Depth = 3.20" 96.90% Pervious = 8.989 ac 3.10% Impervious = 0.287 ac SALEM ST Type 11 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 107 Summary for Subcatchment A-1: EX salem st Runoff = 4.30 cfs @ 12.01 hrs, Volume= 0.208 af, Depth> 2.90" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100YR Rainfall=8.60" Area (sf) CN Description 37,454 55 Woods Good HSG B 37,454 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.5 50 0.1000 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 2.5 217 0.0830 1.44 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 9.0 267 Total Subcatchent A-1: EX Salem st Hydrograph 4.30 cfs El Runoff Type II 24-hr 100Y 4- Rainfal1=8.60" Runoff rea=37,454 sf 3 unoff,Volume=0.208 of Runoff Depth>2.90" o Flow Length=267' 2 . Tc=9.0 rain C =55 - 1- 1 2 3 4 5 6 7 8 9 1011 12 131415 16 17 18 1920 Time (hours) SALEM ST Type 11 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 108 Summary for Subcatchment -2: EX NE Runoff = 8.83 cfs @ 12.07 hrs, Volume= 0.514 af, Depth> 2.90" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100YR Rainfall=8.60" Area (sf) CN Description 92,701 55 Woods, Good, HSG B 92,701 100.00% Pervious Area Tc Length Slope Velocity Capacity Description min _ (feet) (ft/ft) (ft/sec) (cfs) 7.7 50 0.0644 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 6.4 490 0.0644 1.27 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 14.1 540 Total Subcatchment A-2: EX NE Hydro graph 8.83 cfs ', Runoff 9--Type II 24-hr 100YR1 8 m Rainfall=8.60" 7 Runoff Area=��,701 Sf. -- -- - Runoff Volume=0.514 of 6_ Runoff Depth>2.90" 3 5- Flow Length=540' U- 4= Slope=0.0644 '/° - 3 _ Tc=14.1 min GN=55 2- 0 . mgty 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 1617 18 1920 Time (hours) SALEM ST Type 1124-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD09 00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 109 Summary for Subcatchment -3: EX se Runoff = 1.77 cfs @ 11.98 hrs, Volume= 0.078 af, Depth> 2.91" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100YR Rainfall=8.60" Area (sf) CN Description 14,047 55 Woods Good HSG B 14,047 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (fUsec) (cfs) 5.5 50 0.1511 0.15 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 1.0 122 0.1511 1.94 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 6.5 172 Total Subcatchment A-3: EX se Hydro graph 1 .77 cfs Runoff Type II 24-hr 100Y Rainfall=8.60'" Runoff Area=14,047 sf Runoff Volume=0.078 of `v Runoff Depth>2.91" 1. Flow Length=172' Slope=0.1511 'I' LL Tc=6.5 min C'N=55 0 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 1920 Time (hours) SALEM ST Type 11 24-hr 100YR Rainfall=8.60" Prepared by{enter your company name here} Printed 4/10/2017 _HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 110 Summary for Subcatchment A-4: EX nw Runoff = 6.37 cfs @ 12.02 hrs, Volume= 0.317 af, Depth> 2.90" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100YR Rainfall=8.60" Area (sf) CN Description 56,994 55 Woods, Good, HSG B 56,994 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.0 50 0.0808 0.12 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 2.6 222 0.0808 1.42 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 9.6 272 Total Subcatchment A-4: EX nw Hydrograph 7 6.37 CfS Runoff Type II 24-hr 100YRE- -- - -- -- 6 Rainfall=8.60®' 5� Runoff Volum 6,994�sf e=0.317 of 4- Runoff Depth>2.90" Flow Length=272° .2 3 Slope=0.0808;'I' Tc=_.9.6 min -- 2 C'N=55 0 d , 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 1920 Time (hours) SALEM ST Type // 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD09 00 s/n 01057 ©2009 HVdroCAD Software Solutions LLC Page 111 Summary for Subcatchment A-5: internal Runoff = 1.38 cfs @ 11.99 hrs, Volume= 0.062 af, Depth> 2.91" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100YR Rainfall=8.60" Area (sf) CN Description 11,128 55 Woods, Good, HSG B 11,128 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 50 0.1206 0.14 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 1.1 116 0.1206 1.74 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 7.1 166 Total Subcatchment A-5: internal y rorah 1 .38 cfs Runoff Type II 24-hr 100Y Rainfall=8.60'" Runoff Area=11,128 sf 1- Runoff Volume=0.062 of Runoff Depth>2.91" 3 Flow Length=166' Slope=0.1206 '/' Tc=7.1 min CN=55 0- 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 1920 Time (hours) SALEM ST Type 11 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 112 Summary for Subcatchment P-1A: PROPOSED Runoff = 0.59 cfs @ 11.98 hrs, Volume= 0.026 af, Depth> 3.26" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100YR Rainfall=8.60" Area (sf) CN Description 2,208 61 >75% Grass cover, Good, HSG B 1,958 55 Woods, Good, HSG B 4,166 58 Weighted Average 4,166 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 4.3 50 0.0400 0.20 Sheet Flow, Grass: Short n= 0.150 P2= 3.22" 2.0 100 0.0140 0.83 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 6.3 150 Total Subcatchment P-1A: PROPOSED Hydro graph 0.65= 0.J9 CfS LEI Runoff 0.6: yp YR T� a II 24-hr 10Q - _ 0.55- R- Rainfall=8.60" Sf 0.45- Runoff Volume= uno f Area-4 166 0 026 of � 0.4� Runoff Depth>3.26" - - 0.35- Flow Length=150' - 0 0.3 Tc=6.3 min - u_ 0.25 C =58 0.2 = 0.15= - 0.1 : ' 0.05 0 1 2 3 4 5 6 7 8 9 1011 12 1314151617 181920 Time (hours) SALEM ST Type/1 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here) Printed 4/10/2017 HydroCAD09 00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 113 Summary for Subcatchment P-1 1131: proposed Runoff = 2.09 cfs @ 12.00 hrs, Volume= 0.099 af, Depth> 3.10" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100YR Rainfall=8.60" Area (sf) CN Description 11,854 55 Woods, Good, HSG B 4,856 61 >75% Grass cover, Good, HSG B 16,710 57 Weighted Average 16,710 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.5 50 0.1000 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 0.9 52 0.0400 1.00 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 1.2 128 0.1250 1.77 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 8.5 230 Total Subcatchment P-1 B1: proposed Hydrograph 2.09 cfs Runoff Type II2-° 24=hr 100YR Rainfall=8.60" Runoff Area-16,710 sf Runoff Volume=0.099 of Runoff Depth>3.10" o - Flow Length=23 ' Tc=8.5 min CN=57 01 1 2 3 4 5 6 7 8 9 1011 12 13 1415 16 17 18 1920 Time (hours) SALEM ST Type/1 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 114 Summary for Subcatchment P-1132: proposed Runoff = 1.86 cfs @ 11.99 hrs, Volume= 0.085 af, Depth> 3.08" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100YR Rainfall=8.60" Area (sf) CN Description 10,623 55 Woods, Good, HSG B 3,761 61 >75% Grass cover, Good, HSG B 14,384 57 Weighted Average 14,384 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.5 71 0.1400 0.16 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" Subcatchment -1 B2: proposed Hydrograph '_ Runoff 2- 1 .86 cfs m Type 11 24-hr 100YRI Rainfall 8.,60" Runoff Area=14,384 sf Runoff Volume=0.085 of Runoff Depth>3.08 1- Flow Length=71' .2 Slope=0.1400 '/' Tc=7.5 min GN=57 1 2 3 4 5 6 7 8 9 1011 12 131415 161718 1920 Time (hours) SALEM ST Type 11 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here) Printed 4/10/2017 HydroCAD09 00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 115 Summary for Subcatchment -1 C: DIVELOT1 Runoff = 2.13 cfs @ 11.89 hrs, Volume= 0.083 af, Depth> 4.99" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100YR Rainfall=8.60" Area (sf) CN Description 2,844 98 Paved parking, HSG B 5,870 61 >75% Grass cover, Good, HSG B 8,714 73 Weighted Average 5,870 67.36% Pervious Area 2,844 32.64% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.4 50 0.3300 2.12 Sheet Flow, n= 0.022 P2= 3.22" Subcatchment P-1 C: DIVELOT1 Hydrograph 2.13 CfS Runoff Type II 24-hr 100Y 2 Rainfall=8.'60°° Runoff Area=8,714 sf Runoff Volume=0.083 of Runoff Depth>4.99" 3 Flow Length=50' 1. Slope=0.3300 Tc=0.4 min C'N=73 0- r 1 2 3 4 5 6 7 8 9 1011 12 131415 16 17 18 1920 Time (hours) SALEM ST Type/1 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 116 Summary for Subcatchment P-2A: PROPOSED Runoff = 1.61 cfs @ 11.99 hrs, Volume= 0.072 af, Depth> 3.11" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100YR Rainfall=8.60" Area (sf) CN Description 3,787 61 >75% Grass cover, Good, HSG B 8,375 55 Woods, Good, HSG B 12,162 57 Weighted Average 12,162 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.2 50 0.1090 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 0.8 80 0.1090 1.65 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 7.0 130 Total Subcatchment P-2A: PROPOSED Hydrograph 1 .61 ds Runoff Type II 24-hr 100YRI j Rainfall,8.00" Runoff urea=12,162 sf Runoff Volume=0.072 of 1� Runoff Depth5-3.11", -- Flow Length=130' U. Slope=0.1090 Tc=7.0 m i n CN=57 0-$ 1 2 3 4 5 6 7 8 9 1011 12 13 1415 161718 1920 Time (hours) SALEM ST Type/1 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD09 00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 117 Summary for Subcatchment P-2 : PROPOSED Runoff = 5.08 cfs @ 12.06 hrs, Volume= 0.284 af, Depth> 3.20" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100YR Rainfall=8.60" Area (sf) CN Description 25,775 55 Woods, Good, HSG B 20,732 61 >75% Grass cover, Good HSG B 46,507 58 Weighted Average 46,507 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (fUsec) (cfs) 7.9 50 0.0600 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 0.9 109 0.1800 2.12 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 2.6 134 0.0150 0.86 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 1.8 130 0.0300 1.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 13.2 423 Total Subcatchment P-2B: PROPOSED Hydrograph 5.08 cfs Runoff 5- Type II 24-hr 100YR Rainfall=8.60" 4- Runoff rea= 6,507 sf Runoff Volume=0.284 of 3 _ Runoff Dep th>3,.20" o Flow Length=423' U- 2- c=13.2 min C =58 0` 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 1920 Time (hours) SALEM ST Type 11 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here) Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 118 Summary for Subcatchment P-2C: (new Subcat) Runoff = 4.80 cfs @ 12.03 hrs, Volume= 0.258 af, Depth> 4.52" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100YR Rainfall=8.60" Area (sf) CN Description 23,215 61 >75% Grass cover, Good, HSG B 6,633 98 Paved parking, HSG B 29,848 69 Weighted Average 23,215 77.78% Pervious Area 6,633 22.22% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.4 50 0.0100 0.11 Sheet Flow, Grass: Short n= 0.150 P2= 3.22" 2.8 137 0.0140 0.83 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 1.4 210 0.1200 2.42 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 11.6 397 Total Subcatchment P-2C: (new Subcat) Hydrograph 5 4.80 Cfs Runoff Type 11 24-hrI00YR - Rainfal':1=8.60" r 4- Runoff'Area=29,848 sf Volume-0.I Runoff -_ 258 of 3 Runoff'I,Depth>4.52'° o = Flow Length=397' u. 2 Tc=11.6 min CN=69 1 2 3 4 5 6 7 8 9 1011 12 13 1415 161718 1920 Time (hours) SALEM ST Type // 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD09 00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 119 Summary for Subcatchment -3: PROPOSED Runoff = 0.73 cfs @ 12.00 hrs, Volume= 0.034 af, Depth> 2.91" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100YR Rainfall=8.60" Area (sf) CN Description 6,115 55 Woods, Good HSG B 6,115 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) Oft) (ft/sec) (cfs) 6.0 50 0.1200 0.14 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 1.9 200 0.1200 1.73 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 7.9 250 Total Subcatchment P-3: PROPOSED Hydrograph 0.8 0.73 cfs Runoff Typehr 100Y 0.7 Rai fall=8 60" 0.6_ Runoff Are!a=6,115 Sf Runoff Volume=0.034 of 0.5- Runoff Depth>2.91" 0.4- Flow Length=250' Slope=0.1200 '/' LL 0.3 Tc=7.9 min 0.2 . CN=55 0.1 0 ,oYa , , 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type 11 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 120 Summary for Subcatchment P-4: prop nw Runoff = 4.53 cfs @ 12.03 hrs, Volume= 0.234 af, Depth> 3.11" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100YR Rainfall=8.60" Area (sf) CN Description 12,424 61 >75% Grass cover, Good, HSG B 26 917 55 Woods, Good, HSG B 39,341 57 Weighted Average 39,341 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.2 50 0.0764 0.12 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 3.6 301 0.0764 1.38 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 10.8 351 Total Subcatchment P-4: prop nw Hydro graph 5- 4.53 CfS - LEI Runoff Type II 2 -hr 100Y 4 Rainfall=8.60 - Runoff Area=39,341 sf Runoff Vol u m'e=0.234 af__ 3 Runoff Depth>3.11 _- 3 Flow Length=351' o - Slo a=0 0764 7, r LL p 2- T&10.8 min CN=57 M: 1 - 0. 1 2 3 4 5 6 7 8 9 1011 12 13 1415 1617 18 1920 Time (hours) SALEM ST Type 1124-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9 00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Paoe 121 Summary for Subcatchment -5: internal Runoff = 1.58 cfs @ 11.98 hrs, Volume= 0.070 af, Depth> 3.41" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100YR Rainfall=8.60" Area (sf) CN Description 8,014 61 >75% Grass cover, Good, HSG B 2,753 55 Woods, Good HSG B 10,767 59 Weighted Average 10,767 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 50 0.1206 0.14 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.22" 0.6 66 0.1206 1.74 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 6.6 116 Total Subcatchment P-5: internal Hydro graph 1 .58 Cfs Runoff Type II 24-hr 100Y Rainfall,=8.60" Runoff Area=10,767 sf Runoff Volume=0.070 of 1 Runoff Depth>3.41" Flow Length=116' 0 - Slope=0.1206 '/' Tc=6.6 min GN=59 0_ 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 161718 1920 Time (hours) SALEM ST Type/1 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 122 Summary for Subcatchment P3A: LOT3DRIVE Runoff = 0.96 cfs @ 11.89 hrs, Volume= 0.046 af, Depth> 7.94" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100YR Rainfall=8.60" Area (sf) CN Description 3,045 98 Paved parking HSG B 3,045 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.5 100 0.1500 3.09 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.22" Subcatchment P3A: LOT31DRIVE Hydro graph 0.96 cfs Runoff 1 Type II 24-hr 100Y Rainfall,;=8.60'' Runoff Area=3,045 sf Runoff Volume=0.046 of Runoff Depth>7.94 3. Flow Len th ,° Slope=0.1500 V. Tc=0.5 min GN=98 0� 1 6if t tl _ a C 8R c g 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 1920 Time (hours) SALEM ST Type 1124-hr 100YR Rainfall=8.60" Prepared by {enter your company name here) Printed 4/10/2017 HydroCAD09 00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 123 Summary for Reach 8R: (new Reach) Inflow Area = 0.330 ac, 0.00% Impervious, Inflow Depth = 0.69" for 100YR event Inflow = 1.08 cfs @ 12.08 hrs, Volume= 0.019 of Outflow = 1.14 cfs @ 12.10 hrs, Volume= 0.019 af, Atten= 0%, Lag= 0.9 min Routing by Stor-Ind+Trans method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 6.72 fps, Min. Travel Time= 0.2 min Avg. Velocity = 2.85 fps, Avg. Travel Time= 0.6 min Peak Storage= 17 cf @ 12.09 hrs, Average Depth at Peak Storage= 0.19' Bank-Full Depth= 0.60', Capacity at Bank-Full= 13.88 cfs 2.50' x 0.60' deep Parabolic Channel, n= 0.022 Length= 100.0' Slope= 0.1700 '/' Inlet Invert= 119.00', Outlet Invert= 102.00' Reach 8R: (new Reach) ydrgrap Inflow 1 .14 cfs outflow Inflow Area=0.330 Avg. Depth=0.19° r Max Vel=6.72 fps n=0.022 L=100.0 o =0.170 '/' Capacity=13.88 cfs 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type 11 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 124 Summary for Reach 1OR: CUVERT Inflow Area = 1.068 ac, 0.00% Impervious, Inflow Depth > 3.20" for 100YR event Inflow = 5.08 cfs @ 12.06 hrs, Volume= 0.284 of Outflow = 5.04 cfs @ 12.06 hrs, Volume= 0.284 af, Atten= 1%, Lag= 0.3 min Routing by Stor-Ind+Trans method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 5.50 fps, Min. Travel Time= 0.2 min Avg. Velocity = 1.63 fps, Avg. Travel Time= 0.7 min Peak Storage= 67 cf @ 12.06 hrs, Average Depth at Peak Storage= 0.31' Bank-Full Depth= 1.00', Capacity at Bank-Full= 21.32 cfs 36.0"W x 12.0" H Box Pipe n= 0.009 Length= 73.0' Slope= 0.0068 7' Inlet Invert= 117.50', Outlet Invert= 117.00' ZA Reach 10 : CUVERT yrorh LOInflow 5 04 cfs - - - utflow Inflow Area=1.068 ac ' 5 Avg Depth=0.31' Max Ve =5.50 fps 4- 36.0" x 12.0" N Box Pipe 3-- n=0..009 _® L=73.0'U. - v 2 S=00068 '/' Gapacity=21.32cfs 0 � � �. 1 2 3 4 5 6 7 8 9 10 111213 14151617 18 19 20 Time (hours) SALEM ST Type // 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9 00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 125 Summary for Pond 2P: prop se Inflow Area = 0.210 ac, 33.24% Impervious, Inflow Depth > 2.19" for 100YR event Inflow = 1.45 cfs @ 11.95 hrs, Volume= 0.038 of Primary = 1.45 cfs @ 11.95 hrs, Volume= 0.038 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Pond 2P: prop se Hydrograph Inflow 1 .45 CfS 0 Primary Inflow r =0. 0 r 0"'� �aa,. 1 2 3 4 5 6 7 8 9 1011 1213 14151617 181920 Time (hours) SALEM ST Type/1 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 126 Summary for Pond 3P: CHAMBERS Inflow Area = 0.070 ac,100.00% Impervious, Inflow Depth > 7.94" for 100YR event Inflow = 0.96 cfs @ 11.89 hrs, Volume= 0.046 of Outflow = 0.89 cfs @ 11.95 hrs, Volume= 0.046 af, Atten= 7%, Lag= 3.5 min Discarded = 0.07 cfs @ 11.95 hrs, Volume= 0.042 of Primary = 0.82 cfs @ 11.95 hrs, Volume= 0.004 of Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 102.90' @ 11.96 hrs Surf.Area= 0.017 ac Storage= 0.015 of Plug-Flow detention time= 73.6 min calculated for 0.046 of(100% of inflow) Center-of-Mass det. time= 73.1 min ( 774.5 -701.4 ) Volume Invert Avail.Storage Storage Description #1A 100.00, 0.012 of 3.83'W x 72.201 x 2.83'H Field A Z=1.0 0.033 of Overall - 0.003 of Embedded = 0.029 of x 40.0%Voids #2A 101.00, 0.003 of StormTech SC-310 x 10 Inside#1 Effective Size= 28.9"W x 16.0"H => 2.07 sf x 7.12'L = 14.7 cf Overall Size= 34.0"W x 16 0"H x 7 56'L with 0 44' Overlap 0.015 of Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Discarded 100.00' 4.000 in/hr Exfiltration over Surface area #2 Primary 102.83' 6.0" Horiz. Orifice/Grate X 10.00 C= 0.600 Limited to weir flow at low heads Discarded OutFlow Max=0.07 cfs @ 11.95 hrs HW=102.89' (Free Discharge) 't-1=Exfiltration (Exfiltration Controls 0.07 cfs) Primary OutFlow Max=0.82 cfs @ 11.95 hrs HW=102.89' (Free Discharge) 't-2=Orifice/Grate (Weir Controls 0.82 cfs @ 0.82 fps) SALEM ST Type 1124-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9 00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 127 Pond 3P: CHAMBERS - Chamber Wizard Field Chamber Model= StormTech SC-310 Effective Size= 28.9"W x 16.0"H => 2.07 sf x 7.12'L = 14.7 cf Overall Size= 34.0"W x 16.0"H x 7.56'L with 0.44' Overlap 34.0"Wide + 0.0" Spacing = 34.0" C-C 10 Chambers/Row x 7.12' Long = 71.20' + 6.0" End Stone x 2 = 72.20' Base Length 1 Rows x 34.0" Wide + 6.0" Side Stone x 2 = 3.83' Base Width 12.0" Base + 16.0" Chamber Height+ 6.0" Cover= 2.83' Field Height 1.0 '/' Side-Z x Height = 34.0" Flare/Side Base Length + Flare x 2 = 77.87' Top Length Base Width + Flare x 2 = 9.50' Top Length 10 Chambers x 14.7 cf= 147.4 cf Chamber Storage 1,424.9 cf Field - 147.4 cf Chambers = 1,277.5 cf Stone x 40.0% Voids = 511.0 cf Stone Storage Stone + Chamber Storage = 658.4 cf= 0.015 of 10 Chambers 52.8 cy Field 47.3 cy Stone r SALEM ST Type lI 24-hr 100YR Rainfall=8.60" Prepared by{enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 128 Pond 3P: CHAMBERS Hydrograph 0.96 CfS —^� Inflow Inflow Area=0.07 0.89 CfS a Outflow Discarded 1 Peak Elev=10 El Primary Storage=0.01 0.82 Cfs �° - 0. cfs 0 :, „� 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type/1 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 129 Summary for Pond 9P: CHAMBERS Inflow Area = 0.200 ac, 32.64% Impervious, Inflow Depth > 4.99" for 100YR event Inflow = 2.13 cfs @ 11.89 hrs, Volume= 0.083 of Outflow = 1.15 cfs @ 11.98 hrs, Volume= 0.074 af, Atten= 46%, Lag= 5.4 min Discarded = 0.10 cfs @ 11.98 hrs, Volume= 0.063 of Primary = 1.05 cfs @ 11.98 hrs, Volume= 0.011 of Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 104.09' @ 11.98 hrs Surf.Area= 0.024 ac Storage= 0.032 of Plug-Flow detention time= 137.6 min calculated for 0.074 of(89% of inflow) Center-of-Mass det. time= 100.2 min ( 869.6 - 769.4 ) Volume Invert Avail.Storage Storage Description #1 A 100.00, 0.022 of 5.25'W x 72.20'L x 4.00'H Field A Z=1.0 0.065 of Overall - 0.011 of Embedded = 0.055 of x 40.0% Voids #2A 101.00, 0.011 of StormTech SC-740 x 10 Inside#1 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap 0.032 of Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Discarded 100.00' 4.000 in/hr Exfiltration over Surface area #2 Primary 104.00' 6.0" Horiz. Orifice/Grate X 10.00 C= 0.600 Limited to weir flow at low heads Discarded OutFlow Max=0.10 cfs @ 11.98 hrs HW=104.06' (Free Discharge) 't-1=Exfiltration (Exfiltration Controls 0.10 cfs) Primary OutFlow Max=0.89 cfs @ 11.98 hrs HW=104.07' (Free Discharge) 't-2=Orifice/Grate (Weir Controls 0.89 cfs @ 0.85 fps) SALEM ST Type 11 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 130 Pond 9P: CHAMBERS - Chamber Wizard Field A Chamber Model= StormTech SC-740 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap 51.0" Wide + 0.0" Spacing = 51.0" C-C 10 Chambers/Row x 7.12' Long = 71.20' + 6.0" End Stone x 2 = 72.20' Base Length 1 Rows x 51.0" Wide + 6.0" Side Stone x 2 = 5.25' Base Width 12.0" Base + 30.0" Chamber Height + 6.0" Cover=4.00' Field Height 1.0 '/' Side-Z x Height = 48.0" Flare/Side Base Length + Flare x 2 = 80.20' Top Length Base Width + Flare x 2 = 13.25' Top Length 10 Chambers x 45.9 cf= 459.4 cf Chamber Storage 2,840.7 cf Field -459.4 cf Chambers = 2,381.3 cf Stone x 40.0% Voids = 952.5 cf Stone Storage Stone + Chamber Storage = 1,411.9 cf= 0.032 of 10 Chambers 105.2 cy Field 88.2 cy Stone � w SALEM ST Type // 24-hr 100YR Rainfall=8.60" Prepared by{enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 131 Pond 9P: CHAMBERS Hrrap 2.13 Cfs Ej Inflow Outflow Inflow rea=0.200 ac Discarded e lev=1 Primary 2__ Storage=0.032 of 1 .15 Cfs 105 Cfs LL 1 0 Cfs 01 _ ug e a. ae0 +a np a xeug a Assn aeap r o$ a: e: erg, 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type/1 24-hr 100YR Rainfall=8.60" Prepared by{enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 132 Summary for Pond EXFIL: CHAMBERS Inflow Area = 0.685 ac, 22.22% Impervious, Inflow Depth > 4.52" for 100YR event Inflow = 4.80 cfs @ 12.03 hrs, Volume= 0.258 of Outflow = 3.00 cfs @ 12.20 hrs, Volume= 0.219 af, Atten= 38%, Lag= 9.7 min Discarded = 0.28 cfs @ 12.20 hrs, Volume= 0.183 of Primary = 2.72 cfs @ 12.20 hrs, Volume= 0.036 of Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 104.38' @ 12.20 hrs Surf.Area= 3,047 sf Storage= 4,454 cf Plug-Flow detention time= 143.4 min calculated for 0.219 of(85% of inflow) Center-of-Mass det. time= 97.5 min ( 882.0 - 784.5 ) Volume Invert Avail.Storage Storage Description #1A 100.00, 4,003 cf 6.25'W x 194.24'L x 5.00'H Field A Z=1.0 11,249 cf Overall - 1,240 cf Embedded = 10,009 cf x 40.0% Voids #2A 101.00, 1,240 cf StormTech SC-740 x 27 Inside#1 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap 5,244 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Discarded 100.00' 4.000 in/hr Exfiltration over Surface area #2 Primary 104.33' 6.0" Horiz. Orifice/Grate X 44.00 C= 0.600 Limited to weir flow at low heads Discarded OutFlow Max=0.28 cfs @ 12.20 hrs HW=104.38' (Free Discharge) 't-1=Exfiltration (Exfiltration Controls 0.28 cfs) Primary OutFlow Max=2.34 cfs @ 12.20 hrs HW=104.38' (Free Discharge) 't-2=Orifi ce/G rate (Weir Controls 2.34 cfs @ 0.71 fps) SALEM ST Type // 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 133 Pond EXFIL: CHAMBERS - Chamber Wizard Field Chamber Model= StormTech SC-740 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.121 = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.561 with 0.44' Overlap 51.0" Wide + 0.0" Spacing = 51.0" C-C 27 Chambers/Row x 7.12' Long = 192.24' + 12.0" End Stone x 2 = 194.24' Base Length 1 Rows x 51.0" Wide + 12.0" Side Stone x 2 = 6.25' Base Width 12.0" Base + 30.0" Chamber Height + 18.0" Cover= 5.00' Field Height 1.0 T Side-Z x Height = 60.0" Flare/Side Base Length + Flare x 2 = 204.24' Top Length Base Width + Flare x 2 = 16.25' Top Length 27 Chambers x 45.9 cf= 1,240.4 cf Chamber Storage 11,248.9 cf Field - 1,240.4 cf Chambers = 10,008.5 cf Stone x 40.0%Voids = 4,003.4 cf Stone Storage Stone + Chamber Storage = 5,243.8 cf= 0.120 of 27 Chambers 416.6 cy Field 370.7 cy Stone 10 s�3 ^M SALEM ST Type/1 24-hr 100YR Rainfall=8.60" Prepared by{enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 134 Pond EXFIL: CHAMBERS Hydrograph 4.80 Cfs Inflow Inflow Area=0.65 ac El Outflow Discarded 5- Peak Elev=104.38' - El Primary Storage=4,454 cf 4_ - -- 3.00 cfs 2.72 cfs 3- o - LL 2 0'" a a i a: .a area s . a3 rp -seas ae� r z epaiasg ea 1 2 3 4 5 6 7 8 9 1011121314151617181920 Time (hours) SALEM ST Type 11 24-hr 100YR Rainfall=8.60" Prepared by (enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 135 Summary for Pond OUTFLOW: prop ne Inflow Area = 2.032 ac, 7.49% Impervious, Inflow Depth > 2.32" for 100YR event Inflow = 6.23 cfs @ 12.04 hrs, Volume= 0.393 of Primary = 6.23 cfs @ 12.04 hrs, Volume= 0.393 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Pond OUTFLOW: prop ne ydrrap 91 Inflow Inflow rea=2. 3 6.23 CfS Primary 6 5 N m I v 4 0 3- L. 2 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 Time (hours) SALEM ST Type // 24-hr 100YR Rainfall=8.60" Prepared by {enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 136 Summary for Pond POND: dpond Inflow Area = 0.330 ac, 0.00% Impervious, Inflow Depth > 3.08" for 100YR event Inflow = 1.86 cfs @ 11.99 hrs, Volume= 0.085 of Outflow = 1.19 cfs @ 12.08 hrs, Volume= 0.085 af, Atten= 36%, Lag= 5.2 min Discarded = 0.11 cfs @ 12.08 hrs, Volume= 0.066 of Primary = 1.08 cfs @ 12.08 hrs, Volume= 0.019 of Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 119.63' @ 12.08 hrs Surf.Area= 1,216 sf Storage= 1,108 cf Plug-Flow detention time= 76.6 min calculated for 0.084 of(100% of inflow) Center-of-Mass det. time= 75.9 min ( 876.9 -801.1 ) Volume Invert Avail.Storage Storage Description #1 118.50' 1,593 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 118.50 764 0 0 119.00 953 429 429 120.00 1,374 1,164 1,593 Device Routing Invert Outlet Devices #1 Discarded 118.50' 4.000 in/hr Exfiltration over Surface area #2 Primary 119.50' 10.0' long x 3.0' 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 4.00 4.50 Coef. (English) 2.44 2.58 2.68 2.67 2.65 2.64 2.64 2.68 2.68 2.72 2.81 2.92 2.97 3.07 3.32 Discarded OutFlow Max=0.11 cfs @ 12.08 hrs HW=119.62' (Free Discharge) 't-1=Exfiltration (Exfiltration Controls 0.11 cfs) Primary OutFlow Max=1.02 cfs @ 12.08 hrs HW=119.62' (Free Discharge) 't-2=Broad-Crested Rectangular Weir(Weir Controls 1.02 cfs @ 0.85 fps) SALEM ST Type 1124-hr 100YR Rainfall=8.60" Prepared by{enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 137 Pond POND: dpond yrrah - - 1 .86 cfS - inflow Inflow rea=0.330 ac outflow 2_. Discarded Peak lev=11;9.63' Primary Storage=1,108 cf. 1 .19 cfs — 108 cfs 0 LL 0 cfs n �" a: aag ooeg's n aag.�egaa g aa'gaaa sus"gaa a owg oe 'A .ay -ie �;: 1 2 3 4 5 6 7 8 9 1011 12131415 1617181920 Time (hours) SALEM ST Type 11 24-hr 100YR Rainfall=8.60" Prepared by{enter your company name here} Printed 4/10/2017 HydroCAD®9.00 s/n 01057 ©2009 HydroCAD Software Solutions LLC Page 138 Summary for Link 7L: prop salem st Inflow Area = 1.010 ac, 6.47% Impervious, Inflow Depth > 1.84" for 100YR event Inflow = 3.66 cfs @ 12.00 hrs, Volume= 0.155 of Primary = 3.66 cfs @ 12.00 hrs, Volume= 0.155 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs Link 7L: prop salem st Hydrograph El Inflow 4- 3.66 GfS El Primary Inflow Area=1.01 3 _ N V 3 2- FL 4 0 , ,,,�, �� �� Fln , , a ,� ,. ,. 1 2 3 4 5 6 7 8 9 1011 1213 14151617181920 Time (hours) uperation 1975 Salem Street. North Andover Mass. Pollution Prevention and Operations and Maintenance Plan Construction Phase Date: April 10, 2017 1.0 OWNERSHIP AND RESPONSIBILITY 1.1 Stormwater Management System Owners: The owners of the land (Livingstone Development Corp., and any successors) on which the storinwater management systems are located shall be the owners of the systems. 1.2 Parties Responsible for Operation and Maintenance: The general contractor of the project shall be responsible for the operation and maintenance of the stormwater management systems during construction. 2.0 IDENTIFICATION OF POTENTIAL STORMWATER POLLUTANTS The purpose of this section is to identify pollutants that could impact storm water during the construction of this project. 1.3 Significant Material Inventory Pollutants that result from clearing, grading, excavation and building materials that have the potential to be present in storm water runoff are listed in Table 1. This table includes inforination regarding material type, chemical and physical description and the specific regulated storm water pollutants associated with each material. 1.4 Potential Areas for Storm Water Contamination The following potential source areas of storin water contamination were identified and evaluated: ■ Cleared and graded areas; ■ driveway construction; ■ Building construction; ■ Construction site entrance; ■ Tree removal areas; ■ All undisturbed areas. 1975 Salem Street. North Andover Mass. Pollution Prevention and Operations and Maintenance Plan Construction Phase Date: April 10, 2017 Table 1 Potential Construction Site Storm Water Pollutants TRADE NAME CHEMICAL/PHYSICAL { STORM WATER I MATERIAL DESCRIPTION(') POLLUTANTS(') Pesticides(insecticides -- Chlorinated hydrocarbons, Various colored to colorless fungicides,herbicides, organophosphates,carbamates, { liquid,powder,pellets,or grains rodenticides) arsenic __. ._.._._ --_-__-- --_.___._-.- j Fertilizer Liquid or solid grains_ .............Nitrogen phosphorous -q-- Plaster White granules of powder Calcium sulphate calcium carbonate, --- -------- - sulfuric acid Perchloroethylene,menthylene Colorless,blue or yellow-green Cleaning Solvents liquids chloride,trichloroethylene, ' petroleum distillates i Bituminous so Asphalt Black lid eum Oil petrol distillates _-.. - 1 — — Concrete White solid Limestone,sand 1 Glue adhesives White or yellow liquid Polymers,epoxies Paints Various colored liquid Metal oxides,Stoddard solvent,talc I calcium carbonate,arsenic Curing compounds Creamy white liquid Naphtha Wastewater from construction Water Soil,oil and grease,solids equipment washing Wood preservatives Clear,amber or dark brown liquid Stoddard solvent,petroleum III distillates arsenic,copper chromium ------- -- ... -- --- --- - --- - ---.._.------ jBrown or red oily petroleum 3 Hydraulic oil/fluids hydrocarbon Mineral oil � E Gasoline Colorless,pale brown or pink I Benzene ethyl benzene toluene petroleum hydrocarbon xylene, MTBE I I Petroleum distillates,oil and grease, Diesel Fuel Clear,blue-green to yellow liquid _.... , naphthalene,_,xylenes___ _ { Pale yellow liquid petroleum t Kerosene Coal oil,petroleum distillates hydrocarbon Antifreeze/coolant Clear green/yellow liquid Ethylene glycol,propylene glycol, �I heavy metals(co er,lead,zinc Erosion Solid particles ( Soil,sediment (1>Data obtained from MSDSs when available. Table 2 presents site specific information regarding storm water pollution potential for each of these areas. 1975 Salem Street. North Andover Mass. Pollution Prevention and Operations and Maintenance Plan Construction Phase Date: April 10, 2017 Table 2 Locations of Potential Sources of Storm Water Contamination POTENTIAL STORM . WATER DRAINAGE AREAS(') POTENTIAL POTENTIAL PROBLEMS CONT2,MINATION POLLUTANTS POINT; i Erosion of soils from ( Soil erosion,fertilizer, cleared and graded areas Cleared and graded areas All have the potential to pesticides discharge into protected ( resource areas Leaking hydraulic oil and 1 � antifreeze from clearing, grading and asphalt application construction Asphalt,hydraulic oil, equipment. Gasoline and driveways and { gasoline,antifreeze,soil diesel fuel spills while All fueling construction construction site entrance erosion,fertilizer, equipment,and erosion of pesticides exposed and stockpiled C soils. Asphalt chemicals can be released to storm I water if a rain event occurs before curing is complete. Accidental spills of paints and cleaning solvents, Plaster,cleaning solvents, leaking hydraulic oil and asphalt,concrete,paints, antifreeze from hydraulic oil,gasoline, construction equipment, i antifi-eeze,soil erosion gasoline and diesel fuel Building construction All spills while fueling { � fertilizer,pesticides, construction equipment, jglue/adhesives,curing erosion of exposed and compounds,wood stockpiled soils,and preservatives,kerosene degradation of scrap dry I wall can potentially contaminate storm water. j Ruts caused by logging Tree removal areas Soil erosion,fertilizer, equipment can fill with i �1 pesticides water,preventing complete z re-vegetation. No storm water related All undisturbed areas All None issues with completely vegetated areas. 1.5 Summary of Available Storm Water Sampling Data No storm water sampling data is available for this site. 1975 Salem Street. North Andover Mass. Pollution Prevention and Operations and Maintenance Plan Construction Phase Date: April 10, 2017 STORMWATER MANAGEMENT CONTROLS The purpose of this section is to identify the types of temporary and permanent erosion and sediment controls that will be used during construction activities. The controls will provide soil stabilization for disturbed areas and structural controls to divert runoff and remove sediment. This section will also address control of other potential storm water pollutant sources such as construction materials (paints, concrete dust, solvents, and plaster), waste disposal, control of vehicle traffic, and sanitary waste disposal. 1.6 Temporary and Permanent Erosion Control Practices A list of best management practices (BMPs) is included as Table 3;. 1.7 Site Wide Control Measures To prevent soil from washing into adjacent resource areas the following BMPs will be implemented: 1.7.1 SiltSoxx barriers will be placed along the perimeter of the area to be cleared and graded before any clearing or grading takes place. 1.7.2 Soil stockpiles are to be covered and surrounded by a double row of hay bales. 1.7.3 A construction entrance will be installed Table 3 BEST MANAGEMENT PRACTICE MAINTENANCE E BEST DRAINAGE TYPE MAINTENANCE E MANAGEMENT ' AREAS PRACTICE Construction -Built up sediment will be removed from behind siltsoxx fence SiltSoxx All phase when it has reached one-third the height of the fence. 3 f I paved street adjacent to the site entrance will be swept daily to remove excess mud,dirt,or rock tracked from the site. Dump trucks hauling material from the construction site are to Stabilized Construction have their payload covered with a tarpaulin. Construction All Entrance Phase -The stabilized construction entrance will be inspected for } sediment tracked on the road,for clean gravel,and to make sure that the culvert beneath the entrance is working and that all traffic use the stabilized entrance when leaving the site. I } i s � 1975 Salem Street. North Andover Mass. Pollution Prevention and Operations and Maintenance Plan Construction Phase Date: April 10,2017 1.8 Construction Practices to Minimize Storm Water Contamination All waste materials will be collected and stored in a securely lidded metal dumpster rented through a reputable, licensed solid waste management company. The dumpster is to be located outside the buffer zone to resource areas on site. All trash and construction debris from the site will be deposited in the dumpster. The dumpster will be emptied a minimum of twice per week and the trash disposed of in accordance to all local, state and federal regulations. All personnel will be instructed regarding the correct procedure for waste disposal. All sanitary waste will be collected from the portable units a minimum of three times per week by a licensed sanitary waste management contractor. Good housekeeping and spill control practices will be followed during construction to minimize storm water contamination from petroleum products, fertilizers, paints and concrete. Good housekeeping practices are listed below: 1.8.1 A stabilized construction entrance will be constructed at the curb cuts in Salem Street to reduce vehicle tracking of sediments. 1.8.2 The paved street adjacent to the site entrance will be swept as needed to remove excess mud, dirt, or rock tracked from the site. 1.8.3 Dump trucks hauling material from the construction site are to have their payload covered with a tarpaulin. 1.8.4 All ruts caused by equipment used for cutting and removing of trees will be graded and re-vegetated. 1.8.5 Fertilizers will be applied only in the minimum amounts recommended by the manufacturer. 1.8.6 Fertilizers will be worked into the soil to limit exposure to storm water. 1.8.7 Fertilizers will be stored in a covered shed and partially used bags will be transferred to a scalable bin to avoid spills. 1.8.8 All vehicles on site will be monitored for leaks and receive regular preventative maintenance to reduce the chance of leakage. 1.8.9 Petroleum products will be stored in tightly sealed containers which are clearly labeled. 1.8.10 Spill kits will be included with all fueling sources and maintenance activities. 1.8.11 Any asphalt substances used on-site will be applied according to the manufacturer's recommendation. 1.8.12 Sanitary waste will be collected from portable units a minimum of three times a week to avoid overfilling. 1.8.13 A covered dumpster will be used for all waste materials. 1.8.14 All paint containers and curing compounds will be tightly sealed and stored when not in use. Excess paint will not be discharged into the storm sewers, but will be properly disposed of in accordance to the manufacturer's instructions. 1975 Salem Street. North Andover Mass. Pollution Prevention and Operations and Maintenance Plan Construction Phase Date: April 10, 2017 1.8.15 Materials and equipment necessary for spill clean up will be kept in the temporary material storage trailer on-site. Equipment will include, but not be limited to,brooms, dust pans, mops, rags, gloves, goggles, kitty litter, sand, saw dust, and plastic and metal trash containers. 1.8.16 Spray guns will be cleaned on a removable tarp. 1.8.17 All spills will be cleaned up upon discovery. Spills large enough to reach the storm water treatment system will be reported to the engineer, environmental monitor,North Andover Conservation Commission and the Nation Response Center at (800) 424-8802. 1.8.18 Concrete trucks will not be allowed to wash out or discharge surplus concrete or drum wash water on the site. 1.8.19 Form release oil used for building foundations will be applied over a pallet covered with an absorbent material to collect excess fluid. The absorbent material will be replaced and disposed of properly when saturated. 1.8.20 When testing/cleaning water supply lines, the discharge from the tested pipe(s) will be collected and conveyed to a completed section of the storm sewer for discharge into the sedimentation basin. 1.9 Coordination of BMPs with Construction Activities Structural BMPs will be coordinated with construction activities so the BMP is in place before construction begins. The following BMPs will be coordinated with construction activities: 1.9.1 The temporary perimeter controls (siltsoxx) will be installed before any clearing and grading begins. 1.9.2 Clearing and grading will not occur in an area until it is necessary for construction to proceed. 1.9.3 The stabilized construction site entrance and sedimentation basins will be constructed before clearing and grading begins. 1.9.4 Once construction activity ceases permanently in an area, that area will be stabilized with permanent seed and mulch. 1.9.5 After the entire site is stabilized, the accumulated sediment will be removed from the sediment basins or other structural BMPs. 1.9.6 The temporary perimeter controls (silt fence and hay bales) will not be removed until all construction activities at the site are complete and soils have been stabilized. 2.0 CERTIFICATION OF COMPLIANCE WITH FEDERAL, STATE AND LOCAL REGULATIONS This Operation and Maintenance Plan reflects the storm water management requirements of the Town of North Andover and the Commonwealth of Massachusetts, as well as the 1975 Salem Street. North Andover Mass. Pollution Prevention and Operations and Maintenance Plan Construction Phase Date: April 10, 2017 requirements of the US EPA's National Pollutant Discharge Elimination System (NPDES) permit. There are no other applicable State or Federal requirements for sediment and erosion site plans (or permits) or storm water management site plans (or permits). 3.0 INSPECTION AND MAINTENANCE OF STORMWATER MANAGEMENT CONTROLS: Visual inspections of cleared and graded areas should be performed weekly (silt fence/hay bale barriers should be inspected daily by the General Contractor) and within 12 hours of a rainfall event of 0.5 inches or greater. The inspection will be conducted by the Erosion Control monitor. The inspection will, at a minimum, verify that the structural BMPS listed in Table 3 of this plan are in good condition and minimizing erosion. Any entrapped silt shall be removed to an area outside of the buffer zone and wetland resource areas; silt fence and hay bales shall be replaced as necessary. The inspection will also verify that the procedures used to prevent storm water contamination from construction materials and petroleum products are effective. The maintenance inspection report will be made after each inspection. A copy of the report form to be completed by the Erosion Control Monitor is provided in Appendix A of this Operations and Maintenance Plan. Completed forms will be maintained on-site during the entire construction project. Copies of the forms will be sent weekly to the environmental monitor, design engineer, and North Andover Conservation Commission. Following construction, the completed forms will be retained at the general contractor's office for a minimum of one year. If construction activities or design modifications are made to the site plan which could impact storm water, this plan will be amended appropriately. The amended plan will have a description of the new activities that contribute to the increased pollutant loading and the planned source control activities. 3.1 Construction Phase 3.1.1 Erosion Control shall be inspected and maintained/reinforced on a daily basis during construction. 3.1.2 Built up sediment will be removed from behind silt fence when it has reached one-third the height of the fence. 3.1.3 Silt fences will be inspected for depth of sediment, for tears, to see if the fabric is securely attached to the fence posts, and to see that fence posts are securely in the ground. 3.1.4 All exposed soil finish surfaces shall be immediately landscaped and stabilized; or loamed, seeded and mulched with a layer of mulch hay. Outside of the growing season, surfaces shall be covered with a layer of mulch hay until climate conditions allow for seeding. 3.1.5 Immediately upon installation of any catch basin or storm drain, erosion control devices shall be set and staked around the inlet to prevent sediment from entering the drainage system prior to paving. 1975 Salem Street. North Andover Mass. Pollution Prevention and Operations and Maintenance Plan Construction Phase Date: April 10, 2017 3.1.6 All stockpile areas are to be covered, and should have a double row of haybales staked at the base. 3.1.7 During construction, all drainage structures shall be cleaned on an as needed basis and/or after heavy rainfalls. Prior to the placement of any impervious materials on site, all drainage structures shall be properly installed and functional. 3.1.8 During construction(after paving) street sweeping shall be performed on a monthly basis to remove sediment before it enters the catch basins and drainage swales. 3.1.9 Temporary and permanent seeding will be inspected for bare spots, washouts, and healthy growth. inspection will entail viewing the bottom of the chambers through the monitoring ports to determine if the units are draining properly. Water should not be standing in the chambers 72 hours after a storm. If standing water is noted the North Andover Conservation Commission should be notified. 3.1.10 Snow Removal and Storage All snow from impervious surfaces shall be plowed to adjacent vegetated pervious surfaces to melt and recharge into the ground or run off into the stormwater system for treatment. If snow piles on site become too large to accommodate additional plowed snow they should be removed from the site; snow shall never be plowed onto adjacent properties or into adjacent resource areas. 3.1.11 De-Icing and Sanding De-icing compounds shall be used sparingly and only in areas required for the safety of the public. Sanding of the driveways and walks should also be kept to a minimum; if sanding is required the best management practices listed in this plan should be inspected immediately after the winter and, if needed, accumulated sediment from sanding shall be removed. 4.0 ILLICIT DISCHARGES Recording of this Instrument constitutes agreement by the Owner and Operator of the facility that no stormwater discharges other than those outlined on this plan are allowed for this site. Appendix A Inspection Logs 1975 Salem Street. North Andover Mass. Pollution Prevention and Operations and Maintenance Plan Construction Phase Date: April 10, 2017 Inspection and Maintenance Report Form To be completed every 7 days and within 24 hours of a rainfall event of 0.5 inches or more. Inspector: Date: Inspector's Qualifications: Days since last rainfall: days Amount of last rainfall: in. Stabilization Measures ` Date Since Drainage Date of Next Stabilized Stabilized Last Condition Area Disturbance (Yes/No) With Disturbance i P-1 { P-2 i -------------- P-3 I � a P-4 I P-5 P-6 i Stabilization required: To be performed by: On or before: 1975 Salem Street. North Andover Mass. Pollution Prevention and Operations and Maintenance Plan Construction Phase Date: April 10, 2017 Inspection and Maintenance Report Form Sediment ForebayBasin Depth of Sediment in Any Evidence of Condition of Swale Overtopping of the Condition of Outfall Swales (inches) Side Sloped Embankment from Swales (Yes/No) t Maintenance required for sediment forebay/basin: To be performed by: On or before: Stabilized Construction Entrance(Area ): Does all'Traffic use Does Much Sediment Is the Culvert Beneath Is Gravel Clean or the Stabilized Get Tracked on to the Entrance Road. Full of Sediment? Entrance to Leave the Working? ' Site? j I i 1 Maintenance required for stabilized construction entrance(Area ): To be performed by: On or before: 1975 Salem Street. North Andover Mass. Pollution Prevention and Operations and Maintenance Plan Construction Phase Date: April 10, 2017 Inspection and Maintenance Report Form Perimeter Controls: Date: Siltsoxx Has Silt 1 If a Problem ' Reached 1/3 Is Fence Is There is Found Drainage ; Depth of of Fence Properly Evidence of s Area Height? Silt? Secured? Overtopping? t List Nearest (Yes/No) € Flag No. j P1 i I j P-2 I P-3 a P-4 I I � P-5 i �----- i ——------- P-6 Maintenance required for silt fence and hay bales: To be performed by: On or before: