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Home My WebLink AboutWPO201600080 Plan - Stormwater Minor Amendment 2017-02-23 (2)Hydrologic Calculations for Culvert A & SCC -A: Information 625 C -Value: 0.40 Time of Concentration: 15.90 min 10 year Intensity. 4,50 Area: 2.41 acres 10 year Flow: 4.15 cfs Section 105 Shape: Circular Material: Concrete Diameter: 18.00 in Manning's n: 0.013 Number of Barrels: 1 Inlet + CD Inlet Type: Beveled Ring, 45' Ke: 0.20 Inverts :Z Inlet Invert Elevation: 642.00 ft Outlet Invert Elevation: 638.88 ft Length: 47.79 ft Slope: 6.53% Culvert Calculation Inlet Type: Discharge- 3.71 cfs Headwater Elevation: 642.98 ft Tailwater Elevation: 505,10 ft Downstream Velocity: 0.68 ft/s Downstream Flow Depth: 0.376 ft Flow Control Type: Inlet Control, Unsubmerged HYDROLOGIC CALCULATIONS CC SCALE: NTS 635 Hydrologic Calculations for Culvert B & SCC -B: Information EX 625 C -Value: 0.40 00 CD Cq Time of Concentration. 18.2 min April 0-1,013 10 year Intensity. 4.3 Area: 2.41 acres 105 10 year Flow-. 4.15 cfs (D 00 CO >< r1l) Q CD CD . M 620 Section C) 0j 00 CD + Shape: Circular + CD Material: Concrete d Diameter: 15.00 in :Z Mannings n: 0.013 LJ Fy Or-, Oto Number of Barrels: 1 615 Inlet M 0 I YCP @ Inlet Type: Bevelled Ring, 45' 123 Ke: 0.20 36 Inverts 4.248 610 Inlet Invert Elevation: 618.00 ft Outlet Invert Elevation: 615.00 ft Length: 101.29 ft /-EXIST. GRADE Slope: 2.96% Culvert Calculation 605 Discharge: 4.15 cfs Z Headwater Elevation: 619.20 ft Tailwater Elevation: 505.10 ft Downstrearn Velocity. 7.87 ft/s Downstream Flow Depth: 0.56 ft D 0 r_r Flow Control Type: Inlet Control, Unsubmerged 600 0+00 0+50 1+00 1+50 �2 STORM DRAINAGE PROFILE B. �C403) HORZ SCALE: 1"=20' VERT SCALE: 11J=51 THE TOTAL NEW IMPERVIOUS AREA FROM THE NEW ENTERINCE=71,6215 SF THE EXISTING IMPERVIOUS AREA SLATED .TO BE REMOVE13=30,595 SF NET NEW IMPERVIOUS AREA TO TREA-17=4030 SF TOTAL BASE AREA REQUIRED FOR 1:311-+ILTERS=2.5Z x 41,030 SF=1,025 SF TOTAL RUNOFF VGLUIMEE REQUIRED TO RETAINED TIE FIRST V'=41,030/12=x.41,9 CF TWO BIO -FILTERS ARE PROPOSED ON EITHER SIDE OF THE STREAM JUST BELOW THE EXISTING LILLY POND. EACH 1310 -FILTER TO BE SIZED IN PRX)PORTION TO IT'S TOTAL U-1AINAGE AREk THE TOTAI DRAINAGE AREA OF THE BASIN (AS. MEASURED FROM AT INLET TO THE CULVERT CROSSING UNDER THE LOOP ROAD AT STATION 36+84=11.40 ACRES THE AREA EAST OF THE STREAM A80VF THE CULVERT IS 41% OF' THE TOTAL il.AO. ACRES., THE AREA WEST OF THE STREAM ABOVE THE rULVERT IS 59% OF THE TOTAL. 11.40 ACRES. 11MIA", SF REGUIRED,BASE AREA OF THE WEST 610 -FILTER IS 59% OF 1,025 -605 SF. PROVIDED BASE AREA=100* x 18' =1,800 SF REQUIRED VOLUME OF THEWEST BIO -FILTER IS 59% OF 3,419 C17-2,017 CF. PROVIDED. VOLUME= --2,172 C . F AT ELEVATION 654.00. EX r11 1 2 00 CD Cq 00 Apri 1 15. 2013 April 0-1,013 O CD 00 + 00 06 +-4- .-(0 - 105 ri CD (D 00 CO >< r1l) Q CD CD . M :W�- F- P < CD (D C) 0j 00 CD + C� CD U-) U-) :Z 0 _J W = _J LU n < I O� Z a -- + CD d d UJ Z5 W t__ < 01, ry :Z I— V) V) Li 02 LJ Fy Or-, Oto 655 33fl() M M M 0 I YCP @ -3,009 6,597 123 8,92S 118 36 EXIST. GRADE 4.248 0 V) 1(-L)l 0 C) /-EXIST. GRADE FINISHED GRADE E-1 Z _J FINISHED GRADE - Ld L� D 0 r_r t!!� 4, Ll a_ New 15f 101.29 RCP @ _29-67.--- SHEET NO. .403 SCC�13 LF 0+00 0+50 1+00 1+50 �2 STORM DRAINAGE PROFILE B. �C403) HORZ SCALE: 1"=20' VERT SCALE: 11J=51 THE TOTAL NEW IMPERVIOUS AREA FROM THE NEW ENTERINCE=71,6215 SF THE EXISTING IMPERVIOUS AREA SLATED .TO BE REMOVE13=30,595 SF NET NEW IMPERVIOUS AREA TO TREA-17=4030 SF TOTAL BASE AREA REQUIRED FOR 1:311-+ILTERS=2.5Z x 41,030 SF=1,025 SF TOTAL RUNOFF VGLUIMEE REQUIRED TO RETAINED TIE FIRST V'=41,030/12=x.41,9 CF TWO BIO -FILTERS ARE PROPOSED ON EITHER SIDE OF THE STREAM JUST BELOW THE EXISTING LILLY POND. EACH 1310 -FILTER TO BE SIZED IN PRX)PORTION TO IT'S TOTAL U-1AINAGE AREk THE TOTAI DRAINAGE AREA OF THE BASIN (AS. MEASURED FROM AT INLET TO THE CULVERT CROSSING UNDER THE LOOP ROAD AT STATION 36+84=11.40 ACRES THE AREA EAST OF THE STREAM A80VF THE CULVERT IS 41% OF' THE TOTAL il.AO. ACRES., THE AREA WEST OF THE STREAM ABOVE THE rULVERT IS 59% OF THE TOTAL. 11.40 ACRES. 11MIA", SF REGUIRED,BASE AREA OF THE WEST 610 -FILTER IS 59% OF 1,025 -605 SF. PROVIDED BASE AREA=100* x 18' =1,800 SF REQUIRED VOLUME OF THEWEST BIO -FILTER IS 59% OF 3,419 C17-2,017 CF. PROVIDED. VOLUME= --2,172 C . F AT ELEVATION 654.00. APPROVED STORMWATER QUALITY CALCULATIONS SCALE: NTS EAST $10 FILTER THE REQUIRED BASE AREA OF THE EAST BIO -FILTER IS 41% OF 1,025 SF=420 SF. THE PROVIDED BASE AREA=105' x 10'=1,050: SF. THE REQUIRED VOLUME OF THE. EAST BTO -FILTER IS 41% OF 3,419 CF=1,402CF. THE PROVIDED VOLUME=1A13 CF AT ELEVATION 654.00. r11 00 CD Cq 00 Apri 1 15. 2013 April 0-1,013 O CD 00 + 00 06 +-4- .-(0 - 105 10 653 1,050 it -< T �- Cn CO Ld > 0 Co 1,40 24 1-544 00 co I Z > X co � ;!� < ry 2J75 3,588 02 10, 655 33fl() M M M 0 I YCP @ -3,009 6,597 123 8,92S 118 36 656 4.248 0 V) 1(-L)l 0 APPROVED STORMWATER QUALITY CALCULATIONS SCALE: NTS EAST $10 FILTER THE REQUIRED BASE AREA OF THE EAST BIO -FILTER IS 41% OF 1,025 SF=420 SF. THE PROVIDED BASE AREA=105' x 10'=1,050: SF. THE REQUIRED VOLUME OF THE. EAST BTO -FILTER IS 41% OF 3,419 CF=1,402CF. THE PROVIDED VOLUME=1A13 CF AT ELEVATION 654.00. The Total Impervious area from the new entrance = 75,189 SF The existing impervious area slated to removed = 30,595 SIT Net new impervious area to treat = 44,594 SF Total base area requires for bio -filters = 2.5% x .44,594 SF = 1,115 SIF Total runoff volume required to retained the first 'I" = 44,594/12 = 3,716 CF Two bio -filters are proposed on either side of the stream just below the existing filly pond. Each bio -filter to be sized in the proportion to it's total drainage area. The total drainage area of the basin (as measured from inlet to culvert crossing under loop road at station 36+84) = 11.40 acres The area east of the stream above the culvert is 41% of the total 11.40 acres. The area west of the stream above the culvert is 59% of the total 11.40 acres. The required base area of the west -filter is 1025 SF + 90 SF = 1115 SF The provided base area = 1850 SF. The required volume of the west blo-filter is 2017 CF + 297 CF = 2314 CF The provided volume = 2314 CF at elevation of 654. REVISED STORMWATER QUALITY CALCULATIONS SCALE: NTS r11 00 CD Cq 00 Apri 1 15. 2013 00 CD O CD 00 + 00 06 +-4- .-(0 - 105 10 653 1,050 it -< T �- Cn CO Ld > 0 Co 1,40 DA 00 co I Z > X co � ;!� < ry 2J75 3,588 ',7 V 655 2,174 M M M M 0 I YCP @ -3,009 6,597 123 2e, 06 3,44.4 F4 The Total Impervious area from the new entrance = 75,189 SF The existing impervious area slated to removed = 30,595 SIT Net new impervious area to treat = 44,594 SF Total base area requires for bio -filters = 2.5% x .44,594 SF = 1,115 SIF Total runoff volume required to retained the first 'I" = 44,594/12 = 3,716 CF Two bio -filters are proposed on either side of the stream just below the existing filly pond. Each bio -filter to be sized in the proportion to it's total drainage area. The total drainage area of the basin (as measured from inlet to culvert crossing under loop road at station 36+84) = 11.40 acres The area east of the stream above the culvert is 41% of the total 11.40 acres. The area west of the stream above the culvert is 59% of the total 11.40 acres. The required base area of the west -filter is 1025 SF + 90 SF = 1115 SF The provided base area = 1850 SF. The required volume of the west blo-filter is 2017 CF + 297 CF = 2314 CF The provided volume = 2314 CF at elevation of 654. REVISED STORMWATER QUALITY CALCULATIONS SCALE: NTS 0 WEST BIOFILTER CALCULATIONS 11/22/2016 Elevation(FT) Area(SF) Incremental Volume (CF) Accumulated Volume (CF) 653 1850 2314 2314 1. 654 259 3703 6017 655 3980 4815 10832 366 5092 650 645 ZEN 635 620 3 r11 00 CD Cq 00 N,\ 00 CD O CD 00 + 00 06 +-4- .-(0 - CQ 7 (f) U) W it -< T �- Cn CO Ld > 0 Co �WIw 02 00 co I Z > X co � ;!� < ry Cl) �D E- New 18 ',7 L . J Q< C, J M M M M 0 I YCP @ C) M Z 3: < C� Lai Z 6 539-� F4 ry 0 V) 1(-L)l 0 C) /-EXIST. GRADE FINISHED GRADE E-1 Z _J Ld L� D 0 r_r t!!� 4, Ll a_ co SHEET NO. 0+00 - 3� STORM DRAINAGE PROFILE A I I �C403) HORZ SCALE: 1"=20' VERT SCALE: 1"=5' � - ----------- DRAINAGE Z��CLJLVERT-B & X 2.41 ACR NV) /031 C) 100, 10, CULVERT & STORMWATER CONVEYANCE CHANNEL DRAINAGE AREA SCALE: 1" = 50' 0+50 1+00 DRI�A E'�AREA CULV E A SCC -A 2kt,CRE5 . . ......... 645 635 625 620 A r11 Lo N,\ 3 < 0 CQ co > 0 Co �WIw 02 00 co I Z > X co � ;!� < ry Cl) �D E- ',7 L . J Q< C, J M M M M 0 0 C) M Z 3: < C� Lai Z 0 W Y F4 ry 0 V) 1(-L)l 0 C) ME t CQ W E C\2 - > 0 Co �WIw 02 00 co I Z > X co � ;!� Cl) �D E- 04 0 Z 014 Z 0 Z Z 114 0.4 Z P4 C�t) F4 Z ME t E- i 6j E-1 Z _J Ld L� D 0 r_r t!!� 4, Ll a_ co SHEET NO. .403