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Home My WebLink AboutSW8000517_COMPLIANCE_20000710STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE El CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE f� COMPLIANCE EVALUATION INSPECTION DOC DATE �z067Go YYYYMMDD DETENTION POND ANALYSIS FILE NAME S IWQSIPOND1000517-2 WK1 PROJECT # SW8 000517-2 Pond 2 PROJECT NAME Marsh Oaks Section 1 REVIEWER Lewis DATE 10-J u I-2000 Receiving Stream Northeast Creek Class SC N_SW Chlorides n/a Drainage Basin White Oak Index No 19-16-0 5 Site Area 7 94 acres Drainage Area 99055.00 square feet needs to be verified Area in Acres 227 acres IMPERVIOUS AREA Rational C-list beside each item below in E15 to E20 Building 1387800 square feet 1 00 Parking 1460900 square feet 1 00 SW & Patio 602400 square feet 1 00 square feet square feet square feet TOTAL 34511 00 Cc= 048 % IMPERVIOUS 34 84% Des Depth 40 TSS 90 SURFACE AREA CALCULATION Rational ? 1 00 If Rational is used put a SA/DA 3 09% "1" in box E26 If not, leave it blank Req SA 3058 square feet Prov SA 4425 square feet [From plan Contours] ORIFICE CALC No of Orifices ILI Bottom 2 00 MSL Perm Pool 6 00 MSL Design Pool 8 00 MSL Design SA 6507 square feet Req Volume 8255 cubic feet Prov Volume 10932 cubic feet Avg Head = Flow Q2, cfs 0 048 Flow Q5, cfs 0 019 Perm Pool Volume= Req Forebay Volume= Provided Volume= Percent= Des Storm Rv= SA @ _ Elevation= 098 ft Area, in 144 Area, in 058 036356216 0 ERR inches 1 Diameter, in 1001 Area = 0 785 in Q, cfs = 0 026 Drawdown = 3 7 days COMMENTS Surface Area , Volume and Orifice are within Design Guidelines DETENTION POND ANALYSIS FILE NAME S IWQSIPOND1000517-1 WK1 PROJECT # SW8 000517-1 Pond 1 PROJECT NAME Marsh Oaks Section REVIEWER DATE 10-J u 1-2000 Receiving Stream Northeas-t Creek Class -$C N 1N Chlorides NIA Drainage Basin White Oak Index No 19-16-0 5 �� I I 1 II 111 I1111� ^I Site Area 7 94 acres Drainage Area 126760 00 square feet needs to be verified Area in Acres 291 acres IMPERVIOUS AREA Rational C-list beside each item below in E15 to E20 Buildings 18873 00 square feet 1 00 Parking 31571 00 square feet 1 00 SW & Patios 8750 00 square feet 1 00 square feet square feet square feet TOTAL 59194 00 Cc= 057 % IMPERVIOUS 46 70% Des Depth 4 0 TSS 90 SURFACE AREA CALCULATION Rational ? 1 00 If Rational is used put a SAIDA 4 04% "1" in box E26 If not, leave it blank Req SA 5116 square feet Prov SA 6509 square feet [From plan Contours] VOLUME CALCULATION Perm Pool Volume= Req Forebay Volume= 0 Bottom 2 00 MSL Provided Volume= Perm Pool �. 6 00 MSL Percent= ERR Design Pool 7 50 MSL Design SA 8431 square feet Des Storm 1 00 inches Req Volume 10563 cubic feet Rv= 047 Prov Volume 11205 cubic feet SA @ _ Elevation= ORIFICE CALCULATION Avg Head = 072 ft Flow Q2, cfs 0 061 Area, in' 216 Flow Q5, cfs 0 024 Area, in 086 No of Orifices IDiameter, in 1 160 Area = 1 767 in Q, cfs = 0 050 Drawdown = 2 4 days COMMENTS Surface Area , Volume and Orifice are within Design Guidelines