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HomeMy WebLinkAbout20160105 Drywell Drainage Diagrams - Stormwater Report - 254 GREAT POND ROAD 7/13/2016 is 2Si) Roof Area t Drywell #1 Roof Area t Drywell #2 N& 47 Z4 A 500 Gallon Drywell#1 w/ 500 Gallon Drywell2 w/ 12" Stone Surrounding 30" Stone Surrounding Subcat Reach on I Drainage Diagram for 254 Great Pond Road Lin g g I Prepared by{enter your company name here} 7/13/2016 HydroCADO 7.00 s/n 001433 ©1986-2003 Applied Microcomputer Systems 254 Great Pond Road Type/1/ 24-hr 2 yr Rainfall=3.12" Prepared by {enter your company name here} Page 2 HydroCADO 7.00 s/n 001433 © 1986-2003 Applied Microcomputer Systems 7/13/2016 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1S: Roof Area to Drywell #1 Runoff Area=506 sf Runoff Depth=2.70" Tc=6.0 min CN=98 Runoff=0.03 cfs 114 cf Subcatchment 2S: Roof Area to Drywell#2 Runoff Area=870 sf Runoff Depth=2.70" Tc=6.0 min CN=98 Runoff=0.06 cfs 196 cf Pond 1 P: 500 Gallon Drywell#1 w/ 12" Stone SurrPeak Elev=136.45' Storage=27 cf Inflow=0.03 cfs 114 cf Outflow=0.01 cfs 114 cf Pond 2P: 500 Gallon Drywell#2 w/30" Stone SurrPeak Elev=138.10' Storage=44 cf Inflow=0.06 cfs 196 cf Outflow=0.01 cfs 196 cf Total Runoff Area = 1,376 sf Runoff Volume = 310 cf Average Runoff Depth = 2.70" 254 Great Pond Road Type /// 24-hr 2 yr Rainfall=3.12" Prepared by {enter your company name here} Page 3 HydroCAD®7.00 s/n 001433 © 1986-2003 Applied Microcomputer Systems 7/13/2016 Subcatchment 1S: Roof Area to Drywell #1 Runoff = 0.03 cfs @ 12.09 hrs, Volume= 114 cf, Depth= 2.70" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 2 yr Rainfall=3.12" Area (sf) CN Description 506 98 Roof Area to Drywell Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, From Roof Subcatchment 1S: Roof Area to Drywell #1 Hydrograph 0.038. ---- ... --'----I---- ----I--- ----1 ---1----1----1-- -- -i.---- ( Runoff ---I 0 03 cfs - ---- -- ---- ---- ---- 1 I. ..__....I____�_ `..: _-_1___-I-__0.034� ---;---- ----;---- � I I r I I -rye, III- ®hr-2;yr-- 0,032 0.03 - ---- ---- -'-- __ aanfa.II=*3.-12'- - II I I I 0.028- .-- -'-- -- ---- ' -I- -'-- ---'-- - -------- --------'- -R-u no fA re = 0 6 Is- fo.ozs _____ _ -a_ == I 0.024 -I- ----------------'---- I_ : . --- Ruhoff Volur> e=1-14,cf-- y- 022- - --I-- - --- I---' - ---I- -- - --- 0.02 - -'--- --- I- ---I- -- - u rloff-be_pth-2.- 61 LL 0.01 6 a n-- 0.014. I "- --�---- ---T----i-- ,, --T--------T----i----i-- ""98-- 0.012: -------- -------- -- y`7V 0.01" --- r - -- -r--- ----r--- - ;. -T----r---T----r--r-----r---r---- 0.008 ---------1 T---- ------r- T----I----T r---1----r---- 0.006 0.004= r -1----T--- 0.002 0- 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 254 Great Pond Road Type 111 24-hr 2 yr Rainfall=3.12" Prepared by {enter your company name here} Page 4 HydroCAD®7.00 s/n 001433 © 1986-2003 Applied Microcomputer Systems 7/13/2016 Subcatchment 2S: Roof Area to Drywell #2 Runoff = 0.06 cfs @ 12.09 hrs, Volume= 196 cf, Depth= 2.70" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 2 yr Rainfall=3.12" Area (sf) CN Description 870 98 Roof Area to Drywell Tc Length Slope Velocity Capacity Description - (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, From Roof Subcatchment 2S: Roof Area to Drywell #2 Hydrograph ---- 0.065 RUnoff --- --- �- --' -- ----'- -i----' --- --'------- -- 0.06 -- 0.06 cfs - — -- -- ---- ------ ----;--- ---1-------TYpe;-III-24-hr-2 yr-- 0.055- ----'-- - - --'-- -1 -'-- - 1 -1- -'-- --- a--- - - -- , - - - -- , - , - ainfa11=3.-1 0.05- A 1 0.045 unoffi Area® �® !Sf 004 uoff Volurrne-196 'cf I I I 0.035 I, ---+--- un-o.ff-i .e.pth-=2.70--ot 0.03U. - �+ 0.025- ' Y ''1 I I I I i i I I I I I I I 0.02- -98 0.015- 0.01- I ` ' 1 0= , 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 254 Great Pond Road Type /// 24-hr 2 yr Rainfall=3.12" Prepared by {enter your company name here} Page 5 HydroCADO 7.00 s/n 001433 © 1986-2003 Applied Microcomputer Systems 7/13/2016 Pond 1 P: 500 Gallon Drywell#1 w/ 12" Stone Surrounding Field Percolation Rate of Soil = 12 MPI Inflow Area = 506 sf, Inflow Depth = 2.70" for 2 yr event Inflow = 0.03 cfs @ 12.09 hrs, Volume= 114 cf Outflow = 0.01 cfs @ 11.75 hrs, Volume= 114 cf, Atten= 78%, Lag= 0.0 min Discarded = 0.01 cfs @ 11.75 hrs, Volume= 114 cf Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 136.45' @ 12.50 hrs Surf.Area= 64 sf Storage= 27 cf Plug-Flow detention time= 20.6 min calculated for 113 cf(100% of inflow) Center-of-Mass det. time= 20.2 min ( 759.0 - 738.8 ) # Invert Avail.Storage Storage Description 1 135.40' 76 cf 8.00'W x 8.00'L x 4.00'H Prismatoid 256 cf Overall -67 cf Embedded = 189 cf x 40.0% Voids 2 136,40' 67 cf 5.33'D x 3.00'H Vertical Cone/Cylinder Inside#1 143 cf Total Available Storage # Routing Invert Outlet Devices 1 Discarded 0.00' 0.006944 fpm Exfiltration over entire Surface area Discarded OutFlow Max=0.01 cfs @ 11.75 hrs HW=135.45' (Free Discharge) 't-1=Exfiltration (Exfiltration Controls 0.01 cfs) Pond 1 P: 500 Gallon Drywell1 w/ 12" Stone Surrounding Hydrograph --------' --------I----r - -I----I----L--- ----r----'----'---- ®Inflow 0.038 --- ---+--- --------I-- 0.03 cfS ----I---- --- ---+--------I---- ®Discarded 0.036 ---+-- -------- -- - --- Area-I l - 0.034 ; ----{-- ------E---- -- I---'-+ --- 0.032- , 1--------I---- ---r- -+--- ------------r- ie ='1 ® - 0.03"' 0.028 0.026: Sto" r • ----r- 1--�----r--r---r...._. ..---I----r----r---r- -r---I----I--- 0.024..' jq 0.022^ -- 0.02 o 0.018:' 0.016= 0.014 I I I I I 0.012- - -------------------------------- . � I I I I I I 0.01-• :' ---L---1--------I--- 0.01 cfs ------I- - --- L---I--------I---- 0.008 • ____L___L___J-___I____I___ __1---1----I__-_I____ 0.006 -.I-_.__L ___1_ ____L___1____L__.__I._.__._.I_. 0.004- 0.002 0= 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 254 Great Pond Road Type Ill 24-hr 2 yr Rainfall=3.12" Prepared by{enter your company name here) Page 6 HydroCAD®7.00 s/n 001433 © 1986-2003 Applied Microcomputer Systems 7/13/2016 Pond 2P: 500 Gallon Drywell#2 w/ 30" Stone Surrounding Field Percolation Rate of Soil = 12 MPI Inflow Area = 870 sf, Inflow Depth = 2.70" for 2 yr event Inflow = 0.06 cfs @ 12.09 hrs, Volume= 196 cf Outflow = 0.01 cfs @ 11.80 hrs, Volume= 196 cf, Atten= 76%, Lag= 0.0 min Discarded = 0.01 cfs @ 11.80 hrs, Volume= 196 cf Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 138.10' @ 12.47 hrs Surf.Area= 121 sf Storage= 44 cf Plug-Flow detention time= 17.0 min calculated for 196 cf(100% of inflow) Center-of-Mass det. time= 16.6 min ( 755.4 -738.8 ) # Invert Avail.Storage Storage Description 1 137.20' 167 cf 11.00'W x 11.00'L x 4.00'H Prismatoid 484 cf Overall -67 cf Embedded = 417 cf x 40.0% Voids 2 138.20' 67 cf 5.33'D x 3.00'H Vertical Cone/Cylinder Inside#1 234 cf Total Available Storage # Routing Invert Outlet Devices 1 Discarded 0.00' 0.006944 fpm Exfiltration over entire Surface area Discarded OutFlow Max=0.01 cfs @ 11.80 hrs HW=137.25' (Free Discharge) L1=Exfiltration (Exfiltration Controls 0.01 cfs) Pond 2P: 500 Gallon Drywell#2 w/ 30" Stone Surrounding Hydrograph ''.. I I I I I I I I I I I I ®Inflow I ____L___L___J____I____L 0.065-" 0.06 cfs Dlsoarded I I I I I I 0.06= -- F ---+ --- -- -- -- I fl mi, //may 7 I I I I I 0.055� ---r---t----I----I----r---r-- - _..._ .,_.___I___ � . I l v=1 38.10, 0.05' r---T--------r ---r-- - ----r- -r� --�+r---7----I---- --- 0.045. - tOr'. _--II--- ---------------- -- .i----i-- e _f .----L------- ----'----I-- ---1..-- ---I----'----I---._ ._-- ----I----I--- I'.. 0.04- N I I I I I I I I I 0.035-' ---L---L--- 1--------L---L- ---1----1----L---L---1----1----'---- I I I I I I I I I I I I 1 0 0.03 L--- +--- ----I- - ---*- -------I--- r.. -* -- +--------I---- � I I 0.025- r---t------ --I _r---r- -------I--- r.. --r--- r--------r--- I I 1 I I I I I I I I I I I I I I I I I I I I I I I 0.01 cfs 0.015 --- I I I I I I I I I I I I _-__I____I____ 0.01'`' I I I I I I I 0.005- 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 254 Great Pond Road Type 111 24-hr 10 yr Rainfall=4.94" Prepared by {enter your company name here} Page 7 HydroCADO 7.00 s/n 001433 ©1986-2003 Applied Microcomputer Systems 7/13/2016 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment IS: Roof Area to Drywell 41 Runoff Area=506 sf Runoff Depth=4.36" Tc=6.0 min CN=98 Runoff=0.05 cfs 184 cf Subcatchment 2S: Roof Area to Drywell #2 Runoff Area=870 sf Runoff Depth=4.36" Tc=6.0 min CN=98 Runoff=0.09 cfs 316 cf Pond 1 P: 500 Gallon Drywell#1 w/ 12" Stone SurrPeak Elev=137.22' Storage=58 cf Inflow=0.05 cfs 184 cf Outflow=0.01 cfs 184 cf Pond 2P: 500 Gallon Drywell#2 w/30" Stone SurrPeak Elev=138.95' Storage=95 cf Inflow=0.09 cfs 316 cf Outflow=0.01 cfs 316 cf Total Runoff Area = 1,376 sf Runoff Volume = 500 cf Average Runoff Depth = 4.36" 254 Great Pond Road Type 11124-hr 10 yr Rainfall=4.94" Prepared by {enter your company name here} Page 8 HydroCADO 7.00 s/n 001433 © 1986-2003 Applied Microcomputer Systems 7/13/2016 Subcatchment 1S: Roof Area to Drywell #1 Runoff = 0.05 cfs @ 12.09 hrs, Volume= 184 cf, Depth= 4.36" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 10 yr Rainfall=4.94" Area (sf) CN Description 506 98 Roof Area to Drywell Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, From Roof Subcatchment 1S: Roof Area to Drywell #1 Hydrograpn I 0.06- p Runoff 005cfs -T------- -;---_.------T--------T---- 0.055- I I I I I I I I _-- ' Type_Ik1-2-4-hr_;_1D;yr_._ 0.05- __-__ R'ainfall=4.94"-- I 0.045- - ----I-- --- -- -;----II unoff Ar-eam506�sf-- I I I I I I 0.04 uh off Vol urhe®1-84 cf-- w 0.035- --- - - --- ,-- -I--- - -T- _ un®ffbepth=I :36I ®.-- 3 0.03' O 1 0.025 ��®6 ® rr�i n - ®98 0.02 I 1 I I I I I I I I I I 0.015 0.01- I I I I I I I I I I I I I I 0.005 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 254 Great Pond Road Type Ill 24-hr 10 yr Rainfall=4.94" Prepared by {enter your company name here} Page 9 HydroCAD®7.00 s/n 001433 © 1986-2003 Applied Microcomputer Systems 7/13/2016 Subcatchment 2S: Roof Area to Drywell #2 Runoff = 0.09 cfs @ 12.09 hrs, Volume= 316 cf, Depth= 4.36" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 10 yr Rainfall=4.94" Area (sf) CN Description 870 98 Roof Area to Drywell Tc Length Slope Velocity Capacity Description _(min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, From Roof Subcatchment 2S: Roof Area to Drywell #2 Hydrograph 0.105. - ----r----t----r----i----r----I----r----I----r----i----r---- ..._.- t----I ---- �RUftoff '. 0.1 - 0.09 cfs -----T----;---- --- --- -------r--- ---- ---- ---r- 0.095.' , Ype ® -r;10 - -yr-- o.os --L--- --- ----' - - ---- --1-- ------- ----I---- --- 0.085: --L---J----L ----'- -- ---._I_.-.. --------L----'--I r i 0,075. -------- ------- I I _ rea r r r i u sf 0.07- nf T ---I- -- r-- --- ----I -- 0.065 . , I I � � I I I I U e _�_ 0.05 - -- - - - -- " -- - rrff_1_eh�4. 6"'_ _ . I I I I I I I I I I I I I u0.045=" --- --- {---- --------t ------ -- --+--------a - - - � i I I I 0.044 C® . - tn 0.035= - - r----I ---r --r -r---T ---I- --i I_..-- IN®Jv 0.03. ----' --- - -- --- --- 0.025 ------1-------- -------- ----�---- � I I I I I I I I 0.02' --- ---- -------------'- i " ------1------...-1-------- ----'--- I r3 0.005 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 254 Great Pond Road Type /// 24-hr 10 yr Rainfall=4.94" Prepared by {enter your company name here} Page 10 HydroCAD®7.00 s/n 001433 © 1986-2003 Applied Microcomputer Systems 7/13/2016 Pond 1 P: 500 Gallon Drywell1 w/ 12" Stone Surrounding Field Percolation Rate of Soil = 12 MPI Inflow Area = 506 sf, Inflow Depth = 4.36" for 10 yr event Inflow = 0.05 cfs @ 12.09 hrs, Volume= 184 of Outflow = 0.01 cfs @ 11.65 hrs, Volume= 184 of, Atten= 86%, Lag= 0.0 min Discarded = 0.01 cfs @ 11.65 hrs, Volume= 184 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 137.22' @ 12.61 hrs Surf.Area= 64 sf Storage= 58 of Plug-Flow detention time= 50.1 min calculated for 183 of(100% of inflow) Center-of-Mass det. time= 49.5 min ( 784.7 - 735.2 ) # Invert Avail.Storage Storage Description 1 135.40' 76 of 8.00'W x 8.001 x 4.00'H Prismatoid 256 of Overall - 67 of Embedded = 189 of x 40.0% Voids 2 136.40' 67 of 5.33'D x 3.00'H Vertical Cone/Cylinder Inside#1 143 of Total Available Storage # Routing Invert Outlet Devices 1 Discarded 0.00' 0.006944 fpm Exfiltration over entire Surface area Discarded OutFlow Max=0.01 cfs @ 11.65 hrs HW=135.45' (Free Discharge) I—' 1=Exfiltration (Exfiltration Controls 0.01 cfs) Pond 1 P: 500 Gallon Drywell#1 w/ 12" Stone Surrounding Hydrograph 1 I ----- ---- --- ,' --- _I-_ 1 - -- 0.05 cfs --- -- 0.06� t_____ I I �- i I r___r__ -- - f1,_ �Ir 0.055-"� - r- T----1----I----r---r - -- _ 'I r 1= 1-- I 1 1 1 - - --1- 1- 3 2 - 0.045-" ,----r---r---r----r---r---r...- ----I----1----r---r--- r--- I----r--- I I I I I I I I r ® -. '.... --- ®- 0.04-' - r- -t ----1----r---r- ---1---- I--- r ----r- -t--- 1----I---- I I I I I I I I I I I I I I I I I I I I I I I I I I in 0.035 ----r---r----i----r----r-- --r- -- ----r---r----r--- ----I-----r-_ V I I I I I I I I I I I I I O I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 0.01- --- - --- 0.01 cfs 1 --------'-- - --- --------'---- I I I I I 0.005 0- 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 254 Great Pond Road Type/1/ 24-hr 10 yr Rainfall=4.94" Prepared by {enter your company name here} Page 11 HydroCAD®7.00 s/n 001433 0 1986-2003 Applied Microcomputer Systems 7/13/2016 Pond 2P: 500 Gallon Drywell#2 w/ 30" Stone Surrounding Field Percolation Rate of Soil = 12 MPI Inflow Area = 870 sf, Inflow Depth = 4.36" for 10 yr event Inflow = 0.09 cfs @ 12.09 hrs, Volume= 316 cf Outflow = 0.01 cfs @ 11.65 hrs, Volume-- 316 cf, Atten= 85%, Lag= 0.0 min Discarded = 0.01 cfs @ 11.65 hrs, Volume-- 316 cf Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 138.95' @ 12.58 hrs Surf.Area= 121 sf Storage= 95 cf Plug-Flow detention time= 41.9 min calculated for 316 cf(100% of inflow) Center-of-Mass det. time= 41.4 min ( 776.6 - 735.2 ) # Invert Avail.Storage Storage Description 1 137.20' 167 cf 11.00'W x 11.001 x 4.00'H Prismatoid 484 cf Overall -67 cf Embedded = 417 cf x 40.0% Voids 2 138,20' 67 cf 5.33'D x 3.00'H Vertical Cone/Cylinder Inside 41 234 cf Total Available Storage # Routing Invert Outlet Devices 1 Discarded 0.00' 0.006944 fpm Exfiltration over entire Surface area Discarded OutFlow Max=0.01 cfs @ 11.65 hrs HW=137.24' (Free Discharge) L1=Exfiltration (Exfiltration Controls 0.01 cfs) Pond 2P: 500 Gallon Drywell#2 w/ 30" Stone Surrounding Hydrograph ----r----*--------I---- -----------....-r--- --- ----r--- -----*----1---- ---r--- --------I- --r------------'---I---r--------f- - ----I - - - -------- - 0.09CfS ----------------------- --- ®Inflow 0.105. ,' I I I I I I I I I I I I ' ' I ®Discarded -- ftf - 0.09 0.085 ---1 R-i l ev=-1 .- -- r - -- 1 ---I --- - -- -"-- _._. 0.08:0.075: -- ----I- -' -- ---'-- --------------------I---- --- ---- • ,� I I I I I I I I NI I 0.07 __ t---r----I----r---r----I- r-- 7--- r- r- y. -- 0.065: I I I I I I ----r---7----I----I-__r--- -- ---r---r---1----i---r----f----1---- w0.06= ----- ' -'---- '---- -- ---'---- --- L, - -------- --------------------- 3 0.04- 1 I I I I I I I I I I I I • 0.025 0.02: ---r---r -- --- -- 0.01 cfs --r--- ---- 0.015i -'- I I I I 0.01. 0.005: 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 254 Great Pond Road Type /// 24-hr 100 yr Rainfall=7.83" Prepared by {enter your company name here} Page 12 HydroCADO 7.00 s/n 001433 © 1986-2003 Applied Microcomputer Systems 7/13/2016 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment IS: Roof Area to Drywell #1 Runoff Area=506 sf Runoff Depth=6.99" Tc=6.0 min CN=98 Runoff=0.09 cfs 295 cf Subcatchment 2S: Roof Area to Drywell#2 Runoff Area=870 sf Runoff Depth=6.99" Tc=6.0 min CN=98 Runoff=0.15 cfs 507 cf Pond 1P: 500 Gallon Drywell#1 w/ 12" Stone Su Peak Elev=138.63' Storage=112 cf Inflow=0.09 cfs 295 cf Outflow=0.01 cfs 295 cf Pond 2P: 500 Gallon Drywell#2 w/30" Stone Su Peak Elev=140.42' Storage=185 cf Inflow=0.15 cfs 507 cf Outflow=0.01 cfs 507 cf Total Runoff Area = 1,376 sf Runoff Volume = 802 cf Average Runoff Depth = 6.99" 254 Great Pond Road Type/1/24-hr 100 yr Rainfall=7.83" Prepared by {enter your company name here) Page 13 HydroCAD®7.00 s/n 001433 © 1986-2003 Applied Microcomputer Systems 7/13/2016 Subcatchment 1S: Roof Area to Drywell #1 Runoff = 0.09 cfs @ 12.09 hrs, Volume= 295 cf, Depth= 6.99" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 100 yr Rainfall=7.83" Area (sf) CN Description 506 98 Roof Area to Drywell Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, From Roof Subcatchment 1S: Roof Area to Drywell #1 Hydrograpn I 0.095� 0.09-` Runoff -- , — - - 0.09 cfs ,------- -- ---r-- ----T---- . l 0.085: Type-i-I�; i.h-P- -r- --i--- r--- r ---r---.r._- - r---- - '.. 0.08 -r- -r----r--- r ---i- --,- --- , --------r -�ainfa11" .-s30.07_ i.-- --- ---- ---- --- -- -- T-- Runoff- Yea=506sf-- 0.065c -.----r- - - r ---r -r-- .rz-- r----r - -r----r---r-- I----r---- RuOoff Vdlun> e=295 ;ef-- w 0.055 005` -- ----� -- -;-- ; ---Runoff-Depth=,5,99 -- 0 0.045c LL - ---r- -i--- r---7 __...i_ ..-r-- --r----i --- -r- -� r- -i- ----r---- 0.04 - t----r--- r ---Ir -r-- r--------r -i-- G-6.;� �n._.-. 0.035= i -- r ---r----r-- r ..... r -- r- -- ----I- T .. --I-- -r--- CN--98-- 0.03: lr�tl �/ 0.025- i ---r- -r----r---r ---r---7- ,"--r----i----r----r---r----r---r---- 002='� 0.015 0.01 --- 0.0053 ,N 0- 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 254 Great Pond Road Type 111 24-hr 100 yr Rainfall=7.83" Prepared by {enter your company name here) Page 14 HydroCAD®7.00 s/n 001433 © 1986-2003 Applied Microcomputer Systems 7/13/2016 Subcatchment 2S: Roof Area to Drywell #2 Runoff = 0.15 cfs @ 12.09 hrs, Volume= 507 cf, Depth= 6.99" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 100 yr Rainfall=7.83" Area (sf) CN Description 870 98 Roof Area to Drywell Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, From Roof Subcatchment 2S: Roof Area to Drywell #2 ydrograph I I I I I I 1. ------- F i I I I I I ____II___- -I-_-_ 0.16 . cs ; -I----;----I----_t ---- 0.15 -�--- -- �---- - �--- -II4-hr-10-ypI y�I--_r _ Runoff 0.14 0.13.' -- , ---r -- --r- --I-- -- ----r -- 1- �infaJl;7. 3 - - 0.12- ' _- _;-- -- --__-;-- --------Runoff,Are'a= 70-�Sf-- - - --- --- --I------- -I---- ----i---- I I I I I -------T-- 0.1= --- -r-- --- --- -- - --,-- unoff�-V-o.Mume=-07_�Cf- -- 4N 0.09- 0.08- epfh - -�-- ---- -----I -;-- -I--- 1 q� " 0.07- I T VI= .0-m'i n--- ---r---7----t-----I -- -- -I-- ':-------T--------'"T- 006, / 1 1 0.05' 0.04 0.03' c 0.02_ 0.01' 0` 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 254 Great Pond Road Type 11124-hr 100 yr Rainfall=7.83" Prepared by {enter your company name here} Page 15 HydroCADO 7.00 s/n 001433 © 1986-2003 Applied Microcomputer Systems 7/13/2016 Pond 1 P: 500 Gallon Drywell#1 w/ 12" Stone Surrounding Field Percolation Rate of Soil = 12 MPI Inflow Area = 506 sf, Inflow Depth = 6.99" for 100 yr event Inflow = 0.09 cfs @ 12.09 hrs, Volume= 295 cf Outflow = 0.01 cfs @ 11.25 hrs, Volume= 295 cf, Atten= 92%, Lag= 0.0 min Discarded = 0.01 cfs @ 11.25 hrs, Volume= 295 cf Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 138.63' @ 13.01 hrs Surf.Area= 64 sf Storage= 112 cf Plug-Flow detention time= 114.2 min calculated for 295 cf(100% of inflow) Center-of-Mass det. time= 113.7 min ( 846.8 - 733.1 ) # Invert Avail.Storage Storage Description 1 135.40' 76 cf 8.00'W x 8.00'L x 4.00'H Prismatoid 256 cf Overall -67 cf Embedded = 189 cf x 40.0% Voids 2 136.40' 67 cf 5.33'D x 3.00'H Vertical Cone/Cylinder Inside#1 143 cf Total Available Storage # Routing Invert Outlet Devices 1 Discarded 0.00' 0.006944 fpm Exfiltration over entire Surface area Discarded OutFlow Max=0.01 cfs @ 11.25 hrs HW=135.44' (Free Discharge) 't-1=Exfiltration (Exfiltration Controls 0.01 cfs) Pond 1 P: 500 Gallon Drywell#1 w/ 12" Stone Surrounding Hydrograph Fm-rr-.. . --- --r-- ---, -r- + -- r ---, --- Inflow 0.095.' 0.09 cfs DISCarded -- ------------ ---ln , --- 0.09- ---;--- ----i--- fl , f__ 0.085- 0.0s -- -- --------'._ . ----- - Pe'ak-E�ev-,138:6 -- ---- -- - 0.07 --- -- --- - - - --- - --- r 1-12- -- 0.065-: 0.06 w 0.055 005.' o 0.045. LL _ r__...T r____i____i____ 0.045 x :----r--._.i...-_.-� r---r- - ---- --r-...-r---7----r---r---- 0.035 -------r ---------i---,-- ----------r-._._T 0.03z 0.025�' 0.015-.. 0.01= - --- 1---J----1- 0.01 cfs -1- ---- 1-- 1----'--- ---- 0.005 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 254 Great Pond Road Type Ill 24-hr 100 yr Rainfall=7.83" Prepared by {enter your company name here} Page 16 HydroCAD®7.00 s/n 001433 © 1986-2003 Applied Microcomputer Systems 7/13/2016 Pond 2P: 500 Gallon Drywell#2 w/ 30" Stone Surrounding Field Percolation Rate of Soil = 12 MPI Inflow Area = 870 sf, Inflow Depth = 6.99" for 100 yr event Inflow = 0.15 cfs @ 12.09 hrs, Volume= 507 cf Outflow = 0.01 cfs @ 11.35 hrs, Volume= 507 cf, Atten= 91%, Lag= 0.0 min Discarded = 0.01 cfs @ 11.35 hrs, Volume= 507 cf Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 140.42' @ 12.92 hrs Surf.Area= 121 sf Storage= 185 cf Plug-Flow detention time= 96.6 min calculated for 506 cf(100% of inflow) Center-of-Mass det. time= 96.1 min ( 829.2 - 733.1 ) # Invert Avail.Storage Storage Description 1 137.20' 167 cf 11.00'W x 11.001 x 4.00'H Prismatoid 484 cf Overall -67 cf Embedded = 417 cf x 40.0% Voids 2 138.20' 67 cf 5.33'D x 3.00'H Vertical Cone/Cylinder Inside#1 234 cf Total Available Storage # Routing Invert Outlet Devices 1 Discarded 0.00' 0.006944 fpm Exfiltration over entire Surface area Discarded OutFlow Max=0.01 cfs @ 11.35 hrs HW=137.24' (Free Discharge) 't-1=Exfiltration (Exfiltration Controls 0.01 cfs) Pond 2P: 500 Gallon Drywell#2 w/ 30" Stone Surrounding Hydrograph -- ----I --, -- -,-- --; - ----- 0.15 cfs ---- - __ _ ; Inflow Ir---T ,-- �--- r - -r , Discarded 0.16 p l t___rt____I____.1._._-__t._.._.__i__. ____ w,- _ _ __ 0.15 1n \�f,Y/I r a I f _1___J_ 0.14 0.13' ---T----1 1 r----1-- -....-�---1- -1----I----I---- -- --1----- 0.12 l tora er-1- - -- 0.11 I I I I I I I I I ( I ( 0.1: 1 _L---1---i____ 0.09 I I 0 0.08. ----it---i----I----i---r----,-- ---;-......-r----,,----I----_---i----I---- a ---r-----r------------r----r-- --r---r--- ----r---r---I---�---- 0.07 0.06, 0.05- I ----- 1 1 1 0.03= 0.02 --- --- --------1-- --1- - -- ----I --- --- --- ---- - I I 0.01 cfs I 0.01 0= 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours)