Loading...
HomeMy WebLinkAbout2002-12-17 Drainage Calculations WSP E i ROOF RUN-OFF INFILTRATOR DESIGN CALCULATIONS 383 JOHNSON STREET LOT 1-4 NORTH ANDOVER, MA PREPARED FOR: WILLIAM BARRETT HOMES INC. 1049 TURNPIKE STREET NORTH ANDOVER, MA NOV P 1 2002 FLArNvn�irtvi H') ART-MENT MERRIMACK ENGINEERING SERVICES, Inc. 66 Park Street Andover, Massachusetts 01810 planners • engineers 0 surveyors Location:. O- woer,s Name: L m ii. ­i.4.p 1 Map/Parcel: (r'i. Address:- Installer: Tel#: New rsa (s 1 Repair Date:. ��� WctlundsY'tg�lZonc II Soil Symbol Oil c�T�i►r�- ' r - --- Soil Class �- Deep Observation Hole Logs Elevation Depth Soil Horizon Soil Tezhare Soil Color Soil Mottling % Gravel,Stones,etc. ly IWO ��.'�►1. �n�r�'i e✓i�i'l�r �f Parent Material 1 Depth to BedrocL•�` Studln � 2ter in the Hole: _ __Weeping from Pit Face gSHG%V.-�(�— i ' r Parent Material Depth to BedMIL—Standing Water in the Hole:�%yKptn+from Pit Face _�,�ESHGIY: Date - Percolation Tests Observation Hole 9 Depth of Perc Start Pre-saal; Time at 1211 Time at 9" Time at 6" Time(9"-G") •Rate Min/bIch Performed I3`:_E li Lj(r_ 'Witnessed Bv: . f A oeoo, GPI'i t°t l I L 6V,1-1.0V r Units 5c* th M idth t6 Stone Area Tank Yol. Stone Vol. Vol.l Unit 'Fatal Vol. Total Area R 'a.Vol. Comment Lot 1 1.00 C67 2 67 1 AO 66-67 72.92 3129 10421 10421 66.67 62 o k_ Lot 2 2.00 4.67 2-671 2A0 104.00 72.92 71.11 144.03 288.06 206.00 264 a.k. Lat 3 2.00 &00 4.67 2.67 1.51 84.86 .61 247?2 169.7t 247 o k_ Lot 4 2.D0 50.00 6.00 2.83 1.50 117.00 130.62 64.60 195 72L 390.45 234.00 384 o.k 0245—Johnson Street Dryweli Design 10-Year Design Storm Prepared by DK Engimering Assodates Page 1 HydroCADO 6,00 sin 000815 01 OW2001 Appled Mlcrocorn er 8ptems 11 OLZOD2 Subcatehment 1: Lot 9 Runoff 0.06 ots(§ 12,09 hrs, Volume• 0.004 of Runoff by SOS TR-20 method, UH=SCS,Time Span= 5.00-20.00 hrs, dt= 0,05 hrs Type III 24-hr Rainfall=4.50" Areas CN Descrl Lion 676 98 raved parking&roofs To Length Slope Velocity Capacity Description _(min) (feet). (fi/tt) (ft/sec) We.) - 6.0 Dimct Entry,Minimum Value Subcatchment 1: Lot 1 Hydrograph Plot Q RunafT O,OE� O.fKi Q1S O.RuG 0.04$ (1.04- u aass 0.03. w 0,926; 0.02 0.016: c.0t n.oas a- 95 7 B 9 10 1t 12 t3 i4 95 16 i 10 1a 20 Time ,hours) 0245 Johnson Stmt Drywell Desiion 10-Year Design Stomr Prepared by ©K Engineering Associates Page 2 MrroCADO 6.00 s/n 000815 011aW2001 A rEad Wmcom liter Syttems Subeatchment 2: Lot 2 Runoff 0.22 cfs(M 12.09 hrs, Volume= 0.017 of Runoff by SCS TR-20 method, UH=SCS,Time Span=5.00-20.00 Ctrs, di= 0.05 hrs Type III 24-hr Rainfall--*60" Areas GN Description 2,200 98 Paved parking&roots Tc Length Slope Velocity Capacity Description min feet fllft ft/sec Ws) 6.0 Direct Entry, Minimum Value Subcatchment 2: Lot 2 Hydr4graph Plot 0.24. ❑Runoff U.22 ats 0.22= 0.1 s•: 0,16•: 7 0•14 w 0.06- 0.06- 0,04. 0.02•; 0- S 6 7 B 9 10 11 12 13 14 i5 16 17 18 10 20 Time (hours) i 0245—Johnson Street Orywei! Design 90-Year Design Storm Prepared by DK Engineering Associates Page 3 FS droCADO6.00 stn 000815 01986-2001 Apoed Microcom er S terra 11 11 912 002 Subcatchment 3; Lot 3 Runoff 0,20 cfs @ 12.09 hrs, Volume= 0,015 of Runoff by SCS TA-20 method, UH=SCS, Time Span=5,00-20.00 hrs,dt- 0.06 hrs Type III 24-hr rainfall=4.50" _ Area ON Description 2,000 98 Paved part ng &roofs To length Slope Velocity Capacity Description (min) (feet) Oft) Ytfsec) (ofs) 6.0 Direct Entry. Minimum Value Subcatchment 3: Lot 3 Hydfograph Plot 0.2Q 0% p Runoff 0.2. 0.18- Q.1B: Q.14� o.12, 4.1 A.QB= o.oa 0,04' 0.02 o', s 6 7 (3 S i4 11 12 13 14 15 is 17 is 19 20 Tkm (hours) 0245 Johnson Street Dryweli Design 10-Year Ueslgn Storm Prepared by DK Engineedng Associates Page q MyiroCADS)6.00 s1n 000815 01986-2001 Applied Microcorn uter 5 terns !!1 Subcatcchrncnt 4: Lot 4 Runoff = 0.30 cfs @ 12.09 hrs, Volume- 0,023 of Runoff by$CS TR-20 method, UH-SCS,Time Spane 5,00.20.00 hrs, di=0.05 hrs Type III 24-hr Rainfall=41M" Aroa jsq CN Description 3,Op0 98 Paved parking &roofs Tc Length Slope Velocity Capacity Descriplion —(min) feet fink fusee cfs 6.0 Direct Entry, Minimum Value Subcatchment 4: Lot 4 Hydrograph Plot 0.30 cfs 0 RunoH 0.3 026 0.24. 0.22 0.2 O.M. u. 0.14- 0.12 0.1 0,08. 0.04 0,02 0 S 6 7 8 9 id 11 17 13 14 15 1S 17 19 10 20 Time (hours) 0246 -Johnson Street Dryweli Design 10-Year Design Storm Prepared by OK Engineering Associates Rage 5 mCArA 6,00 s/n 000815 01986-20o1 ARP10d Mof000rnp&f S ems 1111.11912002 Pond PI: Drywell for Lot 1 Inflow = 0.06 efs pa 12.09 hrs, Volumes 0.004 of Outflow 0.01 efs @ 12.57 hrs, Volume= 0,004 af, Men= 85%, 09a 29.2 thin Discarded w 0.01 efs Q 12,57 hrs, Volume= 0.004 of Routing by Sior-Ind method, Time Span=5,00.20.00 hrs, dtm 0.05 hrs Peak JEW- 0.93' Storage=tit cf Plug-Flow detention time= 54.0 min calculated for 0,004 of(100%of inflow) Storage and wetted areas determined by Conlc sections Eievatlon Surf.Area Inc.Store Curn.Store Wet.Area (cubic-feet) (cublc-feet) ,(sq-ft) 0.00 67 _..,,©. 0 67 6.00 67 335 335 212 I Nsccairded OtrtFtow (Free Discharge) -t-1 A-t xfiiiration # Routinla Invert Outlet Devices 1 Discarded 0.04' 0.0055 fpm E41tration over anti a YVAtted area Pond P1: Orywell for Lot 1 Hydrogruph Plot "' aq0p400.,,o0+3A..,qas4n1�sSsaz6 �-•: • ❑4.46 s Q RInlflsoowar ded 4.055 a,04 0.023" 0'0c 0.01 "Apbolosim 5 $ 7 8 S 10 11 12 13 14 1B 10 17 18 18 20 Time (hnu15) 0245 Johnson Street Drywall Design 10-Year DesCgn Stoi7n Prepared by OK Engineering Asweiates Page 6 H raC,ADO 6,04 sln 000815 01 OW2001 ad Mlcrocom uter S ems 9 Pond 132: drywall for Lot 2 Inflow 0.22 cfs @ 12.09 hrs, Volume* 0.017 of Outflow = 0.03 cfs(§ 12.70 hrs, Volume- 0.017 af, Men= 88%, Lag=361 min Discarded = 0.03 cfs @ 12.70 hrs, Volume- 0.017 at Routing by Stor-Ind method,Time Span=5.00-20.00 hrs,dt= 0.05 hrs Peak ElevW 1,27' Storage;264 cf Plug-Flow detention time* 62.0 Min calculated for 0.01 7 of(100%of inflow) Storage and wetted areas determined by Conic sections Efevatlon Surf.Aroa Ine,Store Cum.Store Wet,Area (feet} S -ft cub Meet oubic•feet s 1 0.00 203 0 0 208 5.00 206 1,040 1,040 464 Discarded OutFlow (Free Discharge) '-1=�xftltration # Routing____ Invert Cutlet t)evices 1 Discarded 0.00' 0.00556 over entire Mtted area Pond P2: Drywell for Lot 2 Mydrograph Plot t7 inflow 0.24 0,22 4f9 ©Diwwdad D.22 0.2- 0.14 OA6• 0.14 012 0.1 o.ae. 0.0e D.04 0.03 cfs 0.02: n 9 7 9 9 10 11 12 13 14 16 16 1? 18 19 2D TAna (hours) a s 1 0245—Johnson Street Drywell Design 10-YearDesign Storm Prepared by DK Engineering Assodates Page 7 droCADO 6.00 SIR 000015 01986-2001 A ,plied Microcarn er System fi 1 9 Pond P& Drywall for Lot 3 Inflow — 0.20 ofs @ 12,09 hrs, Volurne;�- 0.015 at Outflow 0,02 ohs @ 12.74 hrs, Volume- 0.015 A Men= 89%, Lag=39.4 mitt Discarded = 0.02 oft @ 12.74 hrs, Volurnem 0.015 of Routing by Stor-Ind method,Time Span= 5.00-20.00 hrs, dt=0,05 hrs Peak Elev~ 1.46' Storager-247 cf Plug-Flow detention time--92.7 rnln calculated for 0.015 of(9911/o of inflow) Storage and wetted areas determined by Conic sections Elevation Surf.Area Inc.Store Cum,Store Wet,Area (feet) (se-0) _(cubic-fee!) uWC-feet) (sa-ft) 0.00 169 0 0 169 5.00 169 845 845 399 91scarded OutFlorw (Free Discharge) 1�EAltration # Routing , invert Outlet Devices 1 Discarded 0.09 0-fm5555)rpm F411tration over entire Wetted area Pond P3! Drywell for Lot 3 Hydrograph Plat 0.22 0.20 cf$ 0 Ww srar C7 pidee 0.2 Wa- n,1a 0,14- wy. 0.12: u o O.t• ', . 0.4a) 0.06= 0.04. 0.02 cfs 0,02 n 5 E 7 8 fl 10 11 12 t3 14 15 t8 t� 18 19 20 Time (hours) _ _ . - - - - - - - - - - - - - - 0246—Johnson Street Drywell Design 10-Year Design Storm Prepared by DK Engineering Associates Page 8 HydroCA006.00 -dn 000815 a 1986-2001 Ay!e_dWmLorna0or Systems 11119l2002 Pond Pa: Lot 4 Inflow 0.30 cfs(Q 12.09 hrs, Volume= 0,023 of Outflow - 0,03 cfs 12.84 hrs, Volume= 0.023 af, Men= 90%, Lag=45,3 min Discarded T 0.03 cfs( 12.84 hrs, Volume= 0.023 of Routing by$tor-Ind method, Time Span= 5,00-20.00 hrs, dt: 0.05 hrs Peak Llev;z 1.64' Storage= 384 cf Plug-Flow detention timer 107.7 min calculated for 0.023 of(09%of inflow) Storage and wetted areas determined by Conic sections Elevation Surf.Area Inc,Store Cum.Store Wet.Area feet s -ft aublc feet cubi -fee! s -fii 0.00 234 0 0 234 5.00 234 1,170 1,170 605 Discarded OutF'low (Free Discharge) t-1=Exfiitration # Routing invert outlet Devices 1 Discarded 0,00' O.t)l3;SM fpm Exfiltratioe over entire Wetted atrea Pond P4: Lot 4 Hydrograph Plot 0.30 Cft ©[n8aw 0.32= ©D€soarded 0.3'�r 0.28- 0.28 0.24' a.22.. 0.1 a.: Q.16 a.1= 0.08; o.os- 0.04� LGIS 0.02- 05 6 14 1G 16 17 18 1'9 20 71me (houro)