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Home My WebLink AboutSW8040522_COMPLIANCE_20040527STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW��D�� DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE COMPLIANCE EVALUATION INSPECTION DOC DATE 42(�S 2-7 YYYYMMDD INFILTRATION TRENCH ANALYSIS Filename: S:IWPDATAIWQSIINTRENCH1040522.may04 Project # 040522,may04 Project Name The Pavilion at Carolina Beach Recvng Stream Snows Cut Drainage Basin Cape Fear Site Area 2.74 acres Impervious Area Calculation Buildings 27660 Parking/Asphalt 67960 Concrete 350 Total Volume/Storage Calculation If Rational Method is used, place a 1 in this box Required Provided Design Storm RV Volume toStore Pipe Diameter Length Of a Single run of Pipe Number of Pipe Runs in Trench Storage In Piping Total Storage in Piping Cross -Sectional Area Of Pipe Runs Length Of Trench Width Of Trench Height Of Trench Cross -Sectional Area Of Trench Voids Volume, 40% Trench Volume per linear foot Minimum Trench length required Total Volume Provided Elevation Of Bottom Of Trench Elevation Of SHWT Overflow Elevation Exfiltration Rate / Drawdown Reported Hydraulic Conductivity Bottom Surface Area Date 27-May-04 Reviewer L S Munn Classification SC Index # *18-87-31.5 Drainage Area 119354 SF 2.74 Acres Rational Cc (list C after each BUA) % Impervious: 80.4% Cc: 0.61 2 in 0.77 5330 CF Pipe Size 1 1 Pipe Size 2 Comments: Required volume, storage, and drawdown guidelines are met. 21.7 Mean Sea Level 18 Mean Sea Level 25.8 Mean Sea Level 6.95 Cubic Feet Per Hour Per Sq Ft 8994.7 Square Feet "10 2 3 5' hours J;