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Home My WebLink AboutSW5210202_Plan (Drainage Area)_20210510I.......... l.............. .. .. . ... . II. . ............... .......... ........... .. . .......... ........... ............. ........... lI........... ... .. . ... ... . ...... ... ... ........... ........... . . . ... . ... ... ... .. ... . . .. . . ... .. ......... IIl`3 ..... ........... .... I. ....... . ... ... ... ... ... ... .. ..... ... ............... . ............ . .. ... .......... . . ... . ... IA ALYSIS . . .. ... . .... IPO INT 9 .......... II...... ...... lPRE 21 Il........... .. .. . .. ... IIlIl11111 II........... ... ....... IIIl....... .. III.......... II...... ... ... lltII.. ...... .......... lI................. I........... /f'//////ll///////,l�/ II.... .... .. t.. .. .... I. . ... .. 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POINT 3 POINT 1 li. ........... . .......... ............ ......... I........... . . .. . ...... I............. lI........... I........ . ..... .. . . . . . ... .. I. . ... ...... . . .... ............. . ... I. . . .. .. .. ... .. .. . . ..... .... . ..................... ...... . . ..... . ..... . .. . 7'" lIII.... . . ..... lIl. ...... ...... .. .. .. .. .. .. .. .. . II............. I. ...... ...... .. ..... ........... I.... ...... lI... .. ...... IIIII. . . .. .. . . -77 . .. . ....... .. .... .. .... II........... . . ............ ........... . .... .. .. .. .. .... .... . . . . ......... ....... .. ... 260,, 11111 ....... ... Il111111 I........... lIell I........... ............ . ... ............. ...... ........ llIll............. 265 . .... . . . . . I..... ...... ... ................... ..................... . ... ... lI............... 70 I........... f........... ll.............. O' ............ .. .......................... .......................... 80 . . .......... 1 60' t PRE-DEVELOPED SITE_ STORMWATER QUANTITY CALCULATIONS - DRAINAGE ANALYSIS POINT 1 AREA (CN) Q1 Q2 Q10 (Acres) PRE -DEVELOPMENT 14.32 81 16.90 23.66 43.11 POST -DEVELOPMENT 1.49 89 0.03 0.03 0.24 (11 WET POND) POST -DEVELOPMENT 12.84 81 15.15 21.21 38.65 (11BYPASS) POST -DEVELOPMENT 14.32 15.18 21.24 38.68 (COMBINED) DRAINAGE ANALYSIS POINT 2 AREA (CN) Q1 Q2 Q10 (Acres) PRE -DEVELOPMENT 13.47 85 23.50 31.53 53.90 POST -DEVELOPMENT 1 13.47 1 85 1 23.50 1 31.53 1 DRAINAGE ANALYSIS POINT 3 AREA (CN) Q1 Q2 Q10 (Acres) FRE-DEVELOPMENT 1 0.37 1 79 1 0.70 1 0.98 1 1 . I POST -DEVELOPMENT 1 0.37 1 79 1 0.70 1 0.98 1 1.80 ................... ................. .......... Ii . . . . ....... . I. . ... ..... .. . ...... ...... II.......... .......... l.......... .......... ........... .. ..................... l.... ................ .1 ................ ....... l........... 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I. .. . ....... il. . ............ - ........... ...... i.......................... 11111111, . ... ...... . . ... . ............ Il........ . .. II00 l........... ............. I.................. ............. / .......... . ... ... lIIISQALE,,1!!=6i ........... ...................... -8i 160' `7 IMPERVIOUS DRAINAGE AREA (SF ON -SITE ENZWBUILDINGS/LOTS 7694 � POST-DEVELOPED SITE STORMWATER QUALITY CALCULATIONS PRE DEVELOPMENT ONSITE IMPERVIOUS SURFACES = 4.46 ACRES ON -SITE STREETS 9281 POST DEVELOPMENT ONSITE IMPERVIOUS SURFACES = 4.99 ACRES ON -SITE PARKING 6237 IMPERVIOUS AREA REQUIRED TO BE TREATED = 0.57 ACRES ON -SITE SIDEWALKS 1 623 IMPERVIOUS AREA BEING TREATED BY WET POND = 0.60 ACRES LEGEND_ M .......... .. //M. IMPERVIOUS DRAINAGE AREA l I I 11 I, W iiiii z = 11111111 I 1, 9 I 0 4208 Six Forks Road, Suite 1 000 Raleigh, NC 27609 p: 919.825.4882 www.sgarc.com Consultants: 104MA Timmons Group 5410 Trinity Road, Suite 102 Raleigh, NC 27607 919.866.4951 MEP: RMF Engineering 8081 Arco Corporate Drive, Suite 300 Raleigh, NC 27617 919.941.9876 Structural Engineer: SCHRADERGROUP 4208 Six Forks Road, Suite 1000 Raleigh, NC 27609 919.825.4882 Communications: Mission Critical Partners 4208 Six Forks Road, Suite 100 Raleigh, NC 27609 888.862.7911 � Professional Seal: CAPO SEAL OW 4�7411 i )02,0 Owner: Franklin County, 1 1 3 Market Street Louisburg, NC 27549 NC Ir- Uj 0 70 CU LO C z 0 r-- 0 C-4 t5 =3 E Z 0 0 a) - CY) 00 Clio =3 z 0 -j LL ISSUED FOR: NO. DESCRIPTION DATE 1 DD SET 02-05-2021 2 100% DESIGN DEVELOPMENT 02-17-2021 3 BUILDING PERMIT SET 04-16-2021 4 ISSUED FOR BIDDING 04-23-2021 DATE: 05/10/2021 SIG PROJECT NUMBER: 20-010 Key Plan: � Drawing Title: STORMWATER COMPLIANCE PLAN Drawing Number: C404