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Home My WebLink AboutSW8060622_COMPLIANCE_20060703STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE COMPLIANCE EVALUATION INSPECTION C DOC DATE YYYYMMDD Compliance Inspection Report Permit: SW8060622 Effective: 07/03/06 Expiration: 07/03/16 Owner: Providence Park Properties LLC Project: Providence Park County: New Hanover 3700 N College Rd Region: Wilmington Wilmington NC 28405 Contact Person: Mark L Maynard Title: Phone: 910-251-5030 Directions to Project: Travel 2.70 miles North on US 117 from the intersection of Gordan Rd. & US 117. The site is located on the right and can be accessed from an existing service road that runs parallel to US 117. Type of Project: State Stormwater - HD - Detention Pond Drain Areas: 1 - (Prince George Creek) (03-06-23) (C;Sw) 2- On-Site Representative(s): Related Permits: Inspection Date: 05/04/2010 Entry Time: 12:30 PM Primary Inspector: Angela K Hammers Secondary Inspector(s): Reason for Inspection: Other Permit Inspection Type: State Stormwater Facility Status: ■ Compliant 0 Not Compliant Question Areas: ® State Stormwater (See attachment summary) Exit Time: 01:00 PM Phone: 919-796-7215 Ext.7317 Inspection Type: Stormwater Page: 1 Permit: SW8060622 Owner - Project: Providence Park Properties LLC Inspection Date: 05/04/2010 Inspection Type: Stormwater Beason for Visit: Other Inspection Summary: This project was found in compliance with O&M permit conditions, although it is noted that construction is not complete for all of the proposed buildingslparking areas. This permit has been issued for the same project area as SW8 001120, Currin Tract. File Review 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: Built Upon Area Is the site BUA constructed as per the permit and approval plans? Is the drainage area as per the permit and approved plans? Is the BUA (as permitted) graded such that the runoff drains to the system? Comment: 13 of 20 buildings were observed as constructed. Yes No NA NE 0 ❑ ❑ ❑ Yes No NA NE Operation and Maintenance Yes No NA NE Are the SW measures being maintained and operated as per the permit requirements? ■ ❑ ❑ ❑ Are the 5W BMP inspection and maintenance records complete and available for review or provided to t7WQ ❑ ❑ ❑ upon request? Comment: Page: 2 N DETENTION POND ANALYSIS FILE NAME: G:\DATA\WPDATA\WQS\POND1060622-1.WK1 PROJECT#: SW8 060622-1 REVIEWER: P.Bartlett Pond #1 PROJECT NAME: Providence Park DATE: 03-Jul-06 13 Receiving Stream: Prince George Creek Class: C; Sw Drainage Basin: Cape Fear Index No. 18-74-53 Site Area 38.61 acres Drainage Area 128536- 7:] square feet Area 29.60 acres k"'1. W- IMPERVIOUS AREAS OS Bldgs OS Prkg OS Sidewalks TOTAL SURFACE AREA CALCULATION % IMPERVIOUS 46.79% Des. Depth 4 TSS: 90 Rational C 182081.00 square feet 0.95 352400.00 square feet 0.95 68825.00 square feet 0.95 square feet square feet square feet 6.03306','00] square feet Rational Cc= 0,55 SA/DA Ratio 4.04% Req. SA 52133 sf Prov. SA -7-4 0.72:1 sf VOLUME CALCULATION * place a "ll" in the box if Rational is used Rational ?* Des. StormOOi inches Rv= 0.47 Bottom 24 msl Perm. Pool msl Design Pool 28.66 msl Design SA 77763 sf Req. Volume VO: cf :1 Prov. Volume cf ORIFICE CALCULATION FOREBAY Perm. Pool Volume-- Req. Forebay Volume= Provided Volume= Percent= SA @ Elevation= 241266 48253.2 48887,00 Avg. Head = 0.27 ft Q2 Area = 16.94 sq. in. Flow Q2, cfs 0.293 cfs Q5 Area = 6.78 sq. in. Flow Q5, cfs 0.117 cfs Orifice Area 7.07 sq. in. No. of Orifices Q= 0.122 cfs; Diameter, inches weir H X W in x in Drawdown days COMMENTS Surface Area , Volume and Orifice are within Design Guideline,,: DETENTION POND ANALYSIS FILE NAME: G:IDATAIWPDATAIWQSIPOND1060622-2.WK1 PROJECT #: SW8 060622-2 REVIEWER: P.Bartlett Pond #2 PROJECT NAME: Providence Park DATE: 03-Jul-06 Receiving Stream: Prince George Creek Class: C; Sw Drainage Basin: Cape Fear Index No. 18-74-53 Site Area 38.61 acres Drainage Area =8398:€ € square feet Area = 2.05 acres IMPERVIOUS AREAS Rational C OS Bldgs square feet 0.95 OS Prkg square feet 0.95 OS Sidewalks square feet 0.95 OS Roads 24394.00 square feet 0.95 square feet square feet TOTAL 439OQ. square feet Rational Cc= 0.40 SURFACE AREA CALCULATION % IMPERVIOUS 27.32% Des. Depth 4 TSS: 90 SA/DA Ratio 2.46% Req. SA 2195 sf Prov. SA €€56'Q' sf VOLUME CALCULATION * place a "1" in the box if Rational is used Rational ?* Des. Storm €Qfl€ inches Rv= 0.30 Bottom 28 msl Perm. Pool 32 msl Design Pool 33.91 msl Design SA 7851 sf Req. Volume €20 cf Prov. Volume 12893` cf ORIFICE CALCULATION Avg. Head = Flow 02, cfs Flow Q5, cfs No. of Orifices Diameter, inches Drawdown = FnRFRAY Perm. Pool Volume= Req. Forebay Volume= Provided Volume= Percent= SA @ - Elevation= 10849 2169.8 3421.00 Q2 Area = 0.39 sq. in. Q5 Area = 0.16 sq. in. Orifice Area 0.20 sq. in. Q= 0.006 cfs in x in COMMENTS Surface Area , Volume and Orifice are within Design Guideline: CIL IN Rs a40 ��- 0 '/{s' = 1 P u e 1 ' S70'08'33"E 75,00' C P & L POWERLINE R/W AREA"Aw k �a 206.44 TIE LINE AREA "C' C2 w 98.04' N16'32'31"W 871.83 NORTH COLLEGE ROAD (NC 132) 200' R/IN (PUBLIC) S00 13'14"E 18.70' WETLAND AREA "A" WET FLAG BEARING DISTANCE WET FLAG Al N79'45'49'W 38.69 A2 A2 S84'59'40 36.14 p P S50'50'1G"W 106.87 PA P L S30'52'09' 31.50 A7 A7 S56'04'11"E 39.22 _ A8 A8 S34'02'57"E 40.92 A.9 A9 S6177'32'E 45.28 A10 A.10 S69'48'10"E 45.09 All All S83-35'37'L 47.73 Al2 Al2 N42-12'09" 40.80 A13 A13 N00'44'10"W 41.51 A14 A14 N2523'39'W 48.20 A15 A15 N17'59'S5" ' 50.97 A16 A16 N53'42'56" 43.03 Al AREA=29,432.8 S .ft. PERIMETER =656.1 LF WETLAND AREA_'B' WET FLAG BEARING DISTANCE WET FLAG B1 N77'23'05'W 35.32 82 82 N67'23'13'W 40.34 B3 B3 N40'41'57'W 10.59 B4 84 N61'04'34"E 35.53 B5 B5 N72-54'0a:L 47.57 66 86 N34'19'S9'E 36.50 B7 B7 N72- 28'3t"E 31.22 68 88 577'14'12"E 41.54 39 09 566-46.04"E 44.4b 810 B1t} S63'56'09'E 45.57 ell 611 S68'58'43"E 41.69 812 S60''02''21'E 36.66 B13 B13 S74-16'31"E 41.95 B14 I S75'30'50'E 40.03 615 '0S26410"E 21.08 B16 .89Ol3"W 309.74 B1 AREA=28,959.9 S .ft. PERIMETER-890.B LF 72�o 1 of 1 CIL IN i A TE40 320, rpi AREA"A"- .��g 700833E 75.0At24/216.45.. C p & L POWERLINE RW ` TIE LINE AREA, "C' C2 Lo Cv fy�a 6z N i 6'32'31 "W 871.83' r'} NORTH COLLEGE ROAD (NC 132) 200' R/W (PUBLIC) 4 { V€CINITY MAP I S00'13' 14"E 18, 70' } WETLAND AREA "A" WET FLAG BEARING DISTANCE WET FLAG Al N79-45'49'W 38,69 A2 A2 S64'59'40'W 36.14 p p S50'50'10"W 106.87 p p L S30'52'09'E 31.80 A7 A7 S56-04'11"£ 39.22 A8 AS S34'02'57'E 40.92 A9 A9 56127'32'E 45.28 A10 Al S69'48'10'E 45.09 A11 A11 S83'35'37'E 47.73 Al2 Al2 N42'12'09'E. 40.80 A13 A13 N00'44'10"W 41.51 A14 A14 N25'23'39"W 48.20 A15 A15 NI7'S9'S5"W 50.97 A16 ! Alb N53'42'56"W 43.03 Al AREA=29,432.8 S .tt. PERIMETER=656.1 LF WETLAND AREA 'B' WET FLAG BEARING DISTANCE WET FLAG 61 N77 23'05'W 35.32 92 82 M67'23'13"W 40.34 83 53 f440-41'57"W 41.59 B4 84 N61'04'34"E 35.53 B5 85 N72'54'08'E 47.57 B5 B6 N34'19'59"E 36.50 B7 B7 N72'28'31"E. 31.22 BB 98 S77"14'12E , 41.54 B9 B9 S66'46'04"E 44.46 B10 BID S63'56'09"E 45.57 1311 B11 S58'58'43"E 41.59 612 B12 550'02'21"E 36.66 813 813 S74 f6'31"E 41.95 B14 B14 S75'30'50"E 40.03 815 B15 526.41'00"E 21.08 B16 616 S89'01'30"w 309.74 Bf AREA=28,959.9 Sg.ft. PERIMETER=890.8 LF sco11e: 1 =400 ? 0U 1 of i