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Home My WebLink AboutSW8040401_COMPLIANCE_20040427STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE COMPLIANCE EVALUATION INSPECTION DOC DATE YYYYMMDD Compliance Inspection Report Permit: SW8040401 Effective: 04/27/04 Expiration: Owner: Interstate Business Park LLC Project: Interstate Business Park County: New Hanover Sw Of The Intersection Of Sr 1002 sr 1318 Region: Wilmington Contact Person: Howard A Penton Title: Directions to Project: Southwest of the intersection of SR 1002 & SR 1318 Type of Project: State Stormwater - HD - Detention Pond Drain Areas: 1 - (Prince George Creek) (03-06-23 ) ( C;Sw) 2 - (Prince George Creek) (03-06-23 ) ( C;Sw) 3 - (Prince George Creek) (03-06-23 ) ( C;Sw) 4 - (Prince George Creek) (03-06-23 ) ( C;Sw) On -Site Representative(s): Related Permits: Inspection Date: 1011112010 Entry Time: 10:30 AM Primary Inspector: Angela K Hammers Secondary Inspector(s): Reason for Inspection: Other Permit Inspection Type: State Stormwater Facility Status: ❑ Compliant ❑ Not Compliant Question Areas: 0 State Stormwater (See attachment summary) Wilmington NC 28402 Phone: 910-452-1401 Exit Time: 11:00 AM Phone: 919-796-7215 Ext.7317 Inspection Type: Compliance Evaluation Page: 1 Permit: SW8040401 Owner - Project: Interstate Business Park LLC Inspection Date: 10/1112010 Inspection Type: Compliance Evaluation Reason for Visit: Other Inspection Summary: Project was not built yet. Is the permit active? Signed copy of the Engineer's certification is in the file? Signed copy of the Operation & Maintenance Agreement is in the file? Copy of the recorded deed restrictions is in the file? Comment: Project not built yet. Other Permit Conditions Is the site compliant with other conditions of the permit? Comment: 1■NERNEW Page: 2 4 WETDETENT|ON POND ANALYSIS FILE NAME/ PROJECT#:SVV8 040401.apr04 Pond ' S:1WNQS\POyAD1040401.m r04. ha PROJECT NAME: Interstate Business Park DATE: 27-Apr-04 Ruou|xUngEtpaam: NE-efp� �ear C|000: C Svv Drainage Basin: Cape Fear Index No 8doArem 72.53 oonas Drainage Area 1:::7;'.1:8Z4 33.0WIscluare feet Area in Acres 30.40 IMPERVIOUS AREAS Lobs 813585.00 Gtna*Nn 62300.00 TOTAL SURFACE AREA CALCULATION square feet square feet square feet square feet square feet square feet square feet Rational C %|MPERNOUS 88.15% SA/OARatio 271% Des. Depth 7 Roq.8A 35848 sf sf VOLUME CALCULATION Rational?° Des. Storm d. inches Rv= 0.645 Bottom 16.5mo| Perm. Pool ma| Design Pool 25.5 mo| Storage nnet@a|ev 25.33 ms| Roq.Vo|unna cf Vol. Pnov. at DP cf ORIFICE CALCULATION Avg. Head = F|owO2. ofs Flow O5. cfe No. ofOrifices Diameter, inches Orawdown = COMMENTS 0.93 ft 0.412 ofs 0.165 cfs weir HxVV days * place a "ll" in the box if Rational is used Perm. Pool Vo|ume= 182701 Req. ForaboyVo|umo= 32540.2 ProvidmdVo|unno= 35188.00 Elevation Area Inc. Vol. Acc. Vol. 23.50 36252.00 {]3Area = 12.80 C)5Area = 512 Orifice Area 9.62 Q= 0.310 in x Surface Area@OPFailing Head Drawdown aq.inchea sq. inches oq.incham nfs in 41388 sq.fL 4.0 days WET DETENTION POND ANALYSIS FILE NAME PROJECT#:8VV8 040401.apdJ4 Pond PROJECT NAME: Interstate Business Park S:XWQS1FONO104041.mpr04.xIs DATE: 27-Apr-04 Receiving Stream: NECape Fear River Class: C8w Drainage Basin: Cape Fear Index No. 7ite Area 72.53 acres Drainage Area square feet Area in Acres 1256 IMPERVIOUS AREAS Lots Streets TOTAL SURFACE AREA CALCULATION 33930.00 square feet 37885.00 square feet square feet square feet square feet square feet square feet Rational C Rahono|Co= [i07 %|yWPERV|OUS 67.09Y6 8/VOARotio 27596 Des. Depth 7 Req.SA 15075 af TSS: 80 Pmv.8A af VOLUME CALCULATION * place a "T' in the box if Rational is used Rational ?° Des. Storm inches Rv= 0.654 Bottom 18.5ms| Perm. Pool nns| Design Pool 25.5ms| Storage nnut@e|uw 25.23 ms| Rmq.Vu|ume of Vol. Pmv.atDP cf Avg, Head= Flow O2.cfs Flow O5.cfs No. ofOrifices Diameter, inches Drawdown= [iO5 ft 0.173 ohs 0.069 ofs days FOREBAY Perm. Pool Wduma= Req. FurebamVolume= PnovdedVo|unme= Pement= Elevation Area 23.50' 15619.00 25.50 18756.00 O2Area = 5.30 Q5Area = 2.12 Orifice Area 4.91 Q= 0.160 n x Surface Area @OP= Falling Head Dnawdown= COMMENTS Surface Area , Volume and Orifice are within Design Guidelines. 84481 12896.2 14112.08 Inc. Vol. Acc. Vol. sq. inches sq.|nches sq.|nohes cfs in 18758sq. ft. 3.4doys WET DETENTION POND ANALYSIS FILE NAME PROJECT #:SVV8 040401.apr04 Pond PROJECT NAME: Interstate Business Park S:XWkQS1POND%�40401.apr04.x|s DATE: 27-Apr-04 Receiving Stream: NE Cape Fear River Class: CGw Drainage Basin: Cape Fear Index N Site Area 72.53 acres Drainage Area square feet Area in Acres 15.56 IMPERVIOUS AREAS Rational C Lots 453200.00 square feet Streets 32878.00 square feet square feet square feet square feet square feet TOTAL square feet SURFACE AREA CALCULATION % IMPERVIOUS 71.7496 8AJOARado 2.99% Des. Depth 7 Req.SA 20348 af T88: 80 Pnm. SA af VOLUME CALCULATION * place a "'I" in the box if Rational is used Rodono|?^ Des. Storm inches Rv= 0.696 Bottom 18.5ms| Perm, Pool ms| Design Pool 25.9mo| Storage met@e|ev 25.17 ma| Req. Volume of Vol. Pnov. at DP cf ORIFICE CALCULATION Avg, Head = 0i85 ft Flow Q2. nfs 0.227 cfm Flow {]5. ofs D�081 ofa No, of Orifices Diarneter, inches weir xVV Oravvdown= days FOREBAY Perm. Pool Voun1e= Req. ForebayVo|ume= Pro*idedVo|ume= Elevation Area 23.50 21552.00 25.50 35353.00 Q2Area = 6.88 O5Area = 279 Orifice Area 4.91 C)= 0,160 in x Surface Area @OP= Falling Head Drovvdown= COMMENTS Surface Area , Volume and Orifice are within Design Guidelines. 92834 18588.8 19764.00 Inc. Vol. Acc.lVot eq.inohes aq.|nches aq.inohes cfS in 35358 aq, ft. 47 days WET DETENTION POND ANALYSIS FILE NAME: PROJECT #: SW8 040401.apr04 Pond 4 PROJECT NAME: Interstate 131.1siness Park S:IWQSIPOND1040401.apr04.xls REVIEWER: DATE: 27-Apr-04 Receiving Stream: NE Cape Fear River Class: C Sw Drainage Basin: Cape Fear Index No. Site Area 7 2.53 acres Drainage Area r 00 square feet Area in Acres 5.67 IMPERVIOUS AREAS Rational C Lots 236300.00 square feet Streets 0.00 square feet square feet square feet square feet square feet TOTAL 2330 00' square feet Rational Cc= 0.07 SURFACE AREA CALCULATION % IMPERVIOUS 62.55% Des. Depth 6 TSS: 90 SAIDA Ratio 3.53% Req. SA 13326 sf Prov. SA _ .M 14-149 sf VOLUME CALCULATION * place a "1" in the box if Rational is used Rational ?* Des. Storm .CO; inches Rv= 0.613 Bottom 17 msl Perm. Pool 2OJ' msl ................. . Design Pool 25.5 msl Storage met @elev 24.0£ msl Req. Volume 9297;j cf 1cf Vol. Prov. at DP 4'+sOz3 . ORIFICE CALCULATION Avg. Head = Flow Q2, cfs Flow Q5, cfs No. of Orifices Diameter, inches Drawdown = FOREBAY Perm, Pool Volume= Req. Forebay Volume= Provided Volume= Percent= 46146 (] 9229.2 10050.00 Elevation Area Inc. Vol. Acc. Vol. 23.00 14149.00 25.00 21596.00 35745.00 35745.00 1.21 ft Q2 Area = 3.04 sq. inches 0.112 cfs Q5 Area = 1.22 sq. inches 0.045 cfs Orifice Area 3.11 sq. inches Q= 0.114 cfs weir H x W J in x days Surface Area @DP = Falling Head Drawdown = COMMENTS Surface Area , Volume and Orifice are within Design Guidelines J in 21596 sq. ft. 6.3 days