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Home My WebLink AboutSW6121004_401 Certification Application_20130510Permit No. (to be provided by DWQ) AOaO� W qT �qQG STORMWATER MANAGEMENT PERMIT APPLICATION FORM o r NCDENR 401 CERTIFICATION APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all of the required information. I. PROJECT INFORMATION _ a Project Name McDonald's #32-1588 Contact Person John Holcomb ;. Phone Number 9lM53-5872: . Date 10/1012012 ' Drainage Area Number 1 Ill., DESIGN INFORMATION,': 4 ,:. Site Characteristics Drainage area ' 37,330,92 `ft2 Impervious area 24,306.48 ;ft Percent impervious 65.11 % Design rainfall depth 2.50 in Peak Flow Calculations 1-yr, 24-hr rainfall depth 3.06 in 1-yr, 24-hr intensity 0.13 inthr Pre -development 1-yr, 24-hr discharge 1,31 ft'lsec Post -development 1-yr, 24-hr discharge 0,00. ft3lsec Pre/Post 1-yr, 24-hr peak flow control -1,31 ft3lsec Storage Volume: Non -SA Waters Minimum design volume required 4,946.00 :ft3 Design volume provided 5,553.08 :ft3 OK for non -SA waters Storage Volume: $A Waters 1.5" runoff volume ft3 Pre -development 1-yr, 24-hr runoff volume ft3 Post -development 1-yr, 24-hr runoff volume ft3 Minimum required volume ft3 Volume provided Soils Report Summary NIA ft3 OK Soil type Loamy Sand Infiltration rate 1.10 inlhr OCT SHWT elevation 292.91 fmsl Basin Design Parameters DENR _ WATER �� TM Drawdowntime 5.60 days OK ds at�8� Basin side slopes 3.00 :1 OK Basin bottom elevation 296.00 fmsl OK Storage elevation 299.20 fmsl ��111I I rt f�� Storage Surface Area .3,221.00. f? '1 H CAI R 0�111 Top elevation 300.00 , : fmsl C�. • • ' Basin Bottom Dimensions Basin length 131'00' ft 4 SEAL �0-; Basin width 17.00 ;ft 035917 Bottom Surface Area 459.00 ft2 �-Z� GIN1 11111E.IHOV \\"w f711 % Form SW401-InriRration Basin-Rev.5 11Apr2011 Parts I. & II. Design Summary, Page 1 of 2 Permit No. {to be provided by DWQ) Additional Information Maximum runoff to each inlet to the basin? 0,53 ,ac-in OK Length of vegetative filter for overflow NIA ft OK Distance to structure 72.00, . - ft OK Distance from surface waters >50 ° `:ft OK Distance from water supply well(s) >100.<;, ft OK Separation from impervious soil layer NIA , . ;ft OK Naturally occuring soil above shwt 7.08 "ft OK Bottom covered with 4-in of clean sand? Y, - -(Y or N) OK Proposed drainage easement provided? Y (Y or N) OK Capures all runoff at ultimate build -out? Y (Y or N) OK Bypass provided for larger storms? N ° (Y or N) Must provide bypass for larger flows Pretreatment device provided Curb inlet and riprap . Form SW401-Infiltration Basin-Rov.5 11Ap2011 Parts I. E 11, Design Summary, Page 2 of 2 i Permit No. (to be provided by DWQ) SA o`'�F Wa rFyQG STORMWATER MANAGEMENT PERMIT APPLICATION FORM n ^c NCDENR 401 CERTIFICATION APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This fora must be filled out, printed and submitted. The Required Items Checklist (Part III) must be prinfed, filled out and submitted along with all of the required information. I.. PROJECT'INFORMATION Project Name ,McDonald's #32-1586 Contact Person Jahn Holcomb Phone Number 919-653-5872 Date 1011012012 ; , Drainage Area Number 2 11. DESIGN, INFORMATION Site Characteristics Drainage area 35,937.00' if<z Impervious area .20,952.36, ;f 2 Percent impervious 58.30 % Design rainfafl depth 2.50 `> .• <:',= in Peak Flow Calculations 1-yr, 24-hr rainfall depth . 3.06 -'i in 1-yr, 24-hr intensity 0.13 t inlhr Pre -development 1-yr, 24-hr discharge 1.31 ' ;fi3/sec Post -development 1-yr, 24-hr discharge O.DD::i :' . W/sec PrelPost 1-yr, 24-hr peak Flow control -1.31 fi3/sec Storage Volume: Non -SA Waters Minimum design volume required 4;303.00 . < ft3 Design volume provided 4,315.32 fi3 0K for non -SA waters Storage Volume: SA Waters 1.5" runoff volume Ift3 Pre -development 1-yr, 24-hr runoff volume i ft3 Post -development 1-yr, 24-hr runoff volume . , ft3 Minimum required volume ft3 Volume provided N/A; ft3 OK p{ �J -it� t + $oils Report Summary s, Soil type ' Loamy Sand ., 0 C 1 Infiltration rate - 3.95 ;in/hr SHWT elevation ' 297,00 ;fmsl u,�� R_'_ WATER_ a-u ITY Basin Design Parameters Drawdown time 5.00 -' : days OK Basin side slopes 3.00-. ` A OK Basin bottom elevation 299.00'- >fmsl OK Storage elevation 302.36'- . ' fmsl Storage Surface Area .2,237,00 ; ftz \\11111/ Top elevation Basin Bottom Dimensions .303.00 ° fmsl \\,�� C A Q�/��i ` *is � Basin length 90 06 ", ft y�?"'�+� a SEAL Basin width 40.00;<•< .,::ft , •• 035917 Bottom Surface Area 487.00 '.': `fi2 , • NE�� # Form SW4014nfiltration Basin-Rev.5 11Ap2011 Parts I. & II, Design Summary, Page 1 of 2 r _ Permit No. (to be provided by DWQ) Additional Information Maximum runoff to each inlet to the basin? 1:22 < ac-in OK Length of vegetative filter for overflow NIA . 'ft OK Distance to structure ;,.72.00'. ft OK Distance from surface waters >50 : ' ft OK Distance from water supply well(s) >100> ;it OK Separation from impervious soil layer NIA . ;ft OK Naturally occuring soil above shwt 7.08 `ft OK Bottom covered with 4-in of clean sand? Y (Y or N) OK Proposed drainage easement provided? Y..,:. .. ; (Y or N) OK Capures all runoff a1 ultimate build -out? Y '. ; (Y or N) OK Bypass provided for larger storms? N '(Y or N) Must provide bypass for larger flows Pretreatment device provided Curb' inlet and riprap - Form SW401-InRratlon Basin-Rev.5 11Apr2011 Parts I. & II. Design Summary, Page 2 of 2