SW6240107_Design Calculations_20240529 (2)

IMPERVIOUS AREA CALCULATIONS
Project Name: Raeford South 115kV-Substation Rebuild Date: 5/29/2024
Project Number: DKE-23021 Calculated By: ADM
Impervious Area Data
DA 1 DA 2 DA 3
Total Drainage Area (sf) 75,799 43,598 I 61,878
On-Site Drainage Area (sf) 75,799 43,598 61,878
Off-Site Drainage Area (sf) - - 1 -
Proposed Impervious Area (sf) 13,000 1 8,440 19,078
%Impervious Area 17% 19% 31%
Site Location Total Impervious %
Area(sf.) Area(sf.) Impervious
Substation pad 52,679 - 0.0% _
Substation Shoulder 15,299 15,299 100.0%
Access Apron 4,936 4,936 100.0%
Concrete Driveway 1,413 1,413 100.0%
Laydown/Parking Area-West 15,340 15,340 100.0%
,Laydown/Parking Area-East 3,528 1 3,528 100.0%
Remaining Project Area 88,080 - 0.0%
Total Area 181,275 sf.
Total Impervious 40,516 sf.
Total%Impervious 22.4%
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