HomeMy WebLinkAboutSW6210905_Plansheet - Proposed Drainage Area_20210927I
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� ELEV. 267.80'
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ELEV. 284.38'
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POST -DEVELOPMENT WEIGHTED
CURVE NUMBER CALCULATION
Drainage Area
Post Developed Area A
Area (SF)
Area (Ac)
CN
CN*Ac
Lawn, Fair
137,627
3.16
84
265.40
Gravel
84,871
1.95
91
177.30
Roof/Conc./Asphalt
60,480
1.39
98
136.07
Woods, Fair
0
0.00
79
0.00
Total
1 282,978
1 6.50
1
578.76
Weighted CN (unitless) = 89
Total Impervious Area (SF) = 145,351
Drainage Area
Post Developed Area A Bypass
Area (SF)
Area (Ac)
CN
CN*Ac
Lawn, Fair
18,292
0.42
84
35.27
Gravel
0
0.00
91
0.00
Roof/Conc./Asphalt
0
0.00
98
0.00
Woods, Fair
0
0.00
79
0.00
Total
18,292
1 0.42
35.27
Weighted CN (unitless) = 84
Total Impervious Area (SF) = 0
EXISTING GROUND COVER LEGEND
LAWN
ASPHALT/ROOF/GRAVEL
WOODS
11.1=10121111
PROPERTY BOUNDARY
- -
EX. INTERIOR/ADJ LOT LINE
ACCESS EASEMENT
- - - - - -
BUILDING SETBACK
W __
EXISTING WATER LINE
--SS--
EXISTING SEWER LINE
-- FO--
EXISTING FIBER OPTIC LINE
OHu
EXISTING OVERHEAD POWER
uGE
EXISTING UNDERGROUND POWER
Ss
PROPOSED SANITARY SEWER
NORTH
NOT FOR CONSTRUCTION
POST -DEVELOPMENT
DRAINAGE AREA MAP
SCALE: 1 » = 60 ' (DRAWING SCALED FOR 24x36 INCH PLOTS)
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Checked
By SRN
DATE:
30 JUN 2021
REVISED:
1L16 SEP 2021
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DRAINAGE
MAPS
POST-
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DEVELOPMENT
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APa
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Job Code HCSS 1
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