HomeMy WebLinkAboutSDP200500023 Calculations 2005-03-18 SUBWAY/DAIRY QUEEN AT FOREST LAKES
SITE PLAN
Route 29N
Albemarle County, Virginia
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STORMWATER MANAGEMENT REPORT
March 18, 2005
Job No. 04-001-00
BRIAN P. SMITH, PE
CIVIL ENGINEERING, INC.
Golf Course Design • Engineering • Site Design • Land Planning
105 West High Street
Charlottesville, Virginia 22902-5018
Tel: (434) 296-3644 Fax: (434) 296-2041
Subway/Dairy Queen at Forest Lakes— SWM Computations
INLET COMPUTATIONS
BRIAN P. SMITH, PE
GOLF COURSE DESIGN • ENGINEERING • SITE DESIGN • LAND PLANNING
Subway/Dairy Queen at Forest Lakes- SWM Computations
INLET NUMBER Al LENGTH 2.5
DRAINAGE AREA=0.030 ACRES C VALUE_ .900 CA=0.027
DRAINAGE AREA=0.100 ACRES C VALUE= .900 CA=0.090
SUM CA=0.117 INT=4.00 CFS�.468 CO=0.000 GUTTER FLOW�.468
GUTTER SLOPE=0.0150 FT/FT PAVEMENT CROSS SLOPE=0.0476 FT/FT
SPREAD AT A SLOPE OF .015 (ft./ft.)IS 2.46(ft.) okay
P EFFEC. LENGTH=6.10 H=0.385
DEPTH OF WATER=0.10 SPREAD=2.17
INLET NUMBER A2 LENGTH 2.5
DRAINAGE AREA=0.030 ACRES C VALUE= .900 CA=0.027
DRAINAGE AREA=0.060 ACRES C VALUE_ .900 CA=0.054
SUM CA=0.081 INT=4.00 CFS=0.324 CO=0.000 GUTTER FLOW�.324
GUTTER SLOPE=0.0150 FT/FT PAVEMENT CROSS SLOPE=0.0476 FT/FT
SPREAD AT A SLOPE OF .015 (ft./ft.)IS 2.03 (ft.)okay
P EFFEC. LENGTH=6.10 H=0.385
DEPTH OF WATER=0.08 SPREAD= 1.70
INLET NUMBER B 1 LENGTH 2.5
DRAINAGE AREA= 0.020 ACRES C VALUE= .900 CA= 0.018
DRAINAGE AREA= 0.080 ACRES C VALUE= .900 CA= 0.072
SUM CA�.090 INT=4.00 CFS ).360 CO= 0.000 GUTTER FLOW�.360
GUTTER SLOPE=0.0325 FT/FT PAVEMENT CROSS SLOPE= 0.0200 FT/FT
SPREAD AT A SLOPE OF .032(ft./ft.)IS 3.37(ft.) okay
P EFFEC. LENGTH= 6.10 H=0.385
DEPTH OF WATER=0.09 SPREAD= 4.34
INLET NUMBER B2 LENGTH 2.5
DRAINAGE AREA= 0.010 ACRES C VALUE=.900 CA= 0.009
DRAINAGE AREA= 0.360 ACRES C VALUE= .900 CA= 0.324
SUM CA= 0.333 INT= 4.00 CFS= 1.332 CO= 0.000 GUTTER FLOW= 1.332
GUTTER SLOPE=0.0125 FT/FT PAVEMENT CROSS SLOPE= 0.0500 FT/FT
SPREAD AT A SLOPE OF .013 (ft./ft.)IS 3.99(ft.)okay
P EFFEC. LENGTH= 6.10 H=0.385
DEPTH OF WATER =0.21 SPREAD= 4.16
BRIAN P. SMITH, PE
GOLF COURSE DESIGN • ENGINEERING • SITE DESIGN • LAND PLANNING
Subway/Dairy Queen at Forest Lakes-SWM Computations
INLET NUMBER B3 LENGTH 8
DRAINAGE AREA=0.150 ACRES C VALUE=.900 CA= 0.135
SUM CA=0.135 INT=4.00 CFS=0.540 CO= 0.000 GUTTER FLOW=0.540
GUTTER SLOPE=0.0244 FT/FT PAVEMENT CROSS SLOPE= 0.0250 FT/FT
SPREAD W W/T SW SW/SX Eo a S'W SE
3.91 2.0 0.51 0.0250 1.0 0.85 2.0 0.083 0.096
okay
REQUIRED LENGTH= 8.4 EFFICIENCY= 1.00
CFS INTERCEPTED=0.54 CFS CARRYOVER= 0.00
INLET NUMBER B4 LENGTH 8
DRAINAGE AREA= 0.150 ACRES C VALUE= .900 CA= 0.135
DRAINAGE AREA= 0.320 ACRES C VALUE= .900 CA= 0.288
SUM CA�.423 INT=4.00 CFS=1.692 CO=4.000 GUTTER FLOW=1.692
GUTTER SLOPE=0.0100 FT/FT PAVEMENT CROSS SLOPE= 0.0200 FT/FT
SPREAD AT A SLOPE OF .010(ft./ft.)IS 5.24(ft.)
P EFFEC. LENGTH= 11.60 H=0.460
DEPTH OF WATER =0.16 SPREAD= 7.94 okay, less than 6+2=8
INLET NUMBER Cl LENGTH 2.5
DRAINAGE AREA= 0.010 ACRES C VALUE= .900 CA= 0.009
DRAINAGE AREA= 0.130 ACRES C VALUE= .900 CA= 0.117
SUM CA= 0.126 INT= 4.00 CFS= 0.504 CO= 4.000 GUTTER FLOW= 0.504
GUTTER SLOPE=0.0440 FT/FT PAVEMENT CROSS SLOPE= 0.0200 FT/FT
SPREAD AT A SLOPE OF .044(ft./ft.)IS 3.82(ft.)okay
P EFFEC. LENGTH= 6.10 H=0.385
DEPTH OF WATER = 0.11 SPREAD= 5.44
INLET NUMBER D 1 LENGTH 2.5
DRAINAGE AREA= 0.020 ACRES C VALUE= .900 CA= 0.018
DRAINAGE AREA= 0.050 ACRES C VALUE= .900 CA= 0.045
SUM CA=0.063 INT=4.00 CFS .1.252 CO=4.000 GUTTER FLOW=0.252
GUTTER SLOPE=0.0440 FT/FT PAVEMENT CROSS SLOPE= 0.0200 FT/FT
SPREAD AT A SLOPE OF .010(ft./ft.)IS 1.44(ft.)
P EFFEC. LENGTH= 6.10 H=0.385
DEPTH OF WATER =0.07 SPREAD=3.42 okay, less than 6+2=8
BRIAN P. SMITH, PE
GOLF COURSE DESIGN • ENGINEERING • SITE DESIGN • LAND PLANNING
Subway/Dairy Queen at Forest Lakes— SWM Computations
STORM COMPUTATIONS
BRIAN P. SMITH, PE
GOLF COURSE DESIGN • ENGINEERING • SITE DESIGN • LAND PLANNING
Appendix 9B-2 LD-229 Storm Drain Design Computations ,'/ /' 26,5
LD-229 ROUTE: PROJ: 5U 4Y �Ir-t' �J �(j62�% /p -(3i 4-3
July 2000 STORM SEWER DESIGN COUNTY: ,�L.,3& DISTRICT•
, COMPUTATIONS DESCRIPTION:
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AREA RUN- INLET RAIN RUN- INVERT CAPA- FLOW
DRAIN OFF CA TIME FALL OFF ELEVATIONS LENGTH SLOPE DIA CITY VEL TIME
FROM TO "A" COEF. _ O MINUTES REMARKS
POINT POINT INCRE- ACC U M- MIN- ,IN /HR C.F S UPPER LOWER FT FT (FT IN C F S F.P.S ivcac vc yr
ACRES C M E N T U LA T E D U T E S END END c c u M -•r c o
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1 of 1 VDOT Drainage Manual