SW6240401_Plansheet - Grading/Drainage Plan_20240701

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PIN 0597-69-2388.000 TEMPORARY SKIMMER BASIN 1 W BAFFLES = 44
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IMPERVIOUS CALCULATIONS > > > TEMPORARY DIVERSION BERM (TDB DEED BOOK 4063, PAGE 823 ��'•F` •��:
3 T TAL DRAINAGE AREA=2.3AC.(7 DAY 3...
PROPERTY AREA: 63,690SF x x x TEMPORARY BSI SILT FENCON E (TSF)ME ME MB 22-91 Q10=(0.3)(7.21N/HR)(2.3AC.)=5.0CFS �'.�N °®°°`°•� �� w
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os D LIMITS OF DISTURBED AREA \ VOL. REQ'D=1,800CF/AC*(1.5AC)=2700CF
¢?, TOTAL DISTURBED AREA=1.6 ACRES \ SURFACE AREA REQ'D=325SF/CFS*(5.00FS)=1625SF
MAXIMUM IMPERVIOUS AREA ALLOWED (24% - LOW DENSITY): 15,286SF --------_100 ———————— EXISTING CONTOUR \ ,
SR 1769 100 FINISH GRADE CONTOUR TOP L=110 , TOP W=15 , D=3
IMPERVIOUS AREA PROPOSED: 15,000 SF (AVERAGE 3,750SF PER LOT INCLUDING AREA — DRAINAGE AREA / (2:1 SIDE SLOPES - 7 DAY STABILIZATION TIME FRAME TYP.) ��0 ACT z
BETWEEN EXISTING R/W & EXISTING MAPLE DRIVE) ®a TEMP. ROCK CHECK DAM (TRCD) SURFACE AREA PROVIDED=1650SF ��� 6 y
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VICINITY \�
VOL. PROVIDED=2844CF Q
7 �Q� 5
NTS NO JURISDICTIONAL WETLANDS ARE PRESENT ON THE PROPERTY PER WETLANDS \ — WEIR WIDTH=4' � o
INVESTIGATION PERFORMED BY ADAM CARTER — WETLAND SOLUTIONS, LLC — P.O. BOX \ SKIMMER SIZE: 1.5" 'ar moo
244 BUNNLEVEL, NC 28323. LETTER DATED 03-27-2024 , \ SKIMMER ORIFICE DIAMETER=1"
DEWATERING TIME: 3.3 DAYS '�3arm Q
PROJECT IS LOCATED WITHIN FIVE MILES OF A COMMERCIAL AIRPORT: o NOTE: CLEAN BASIN WHEN 50% FULL DURING CONSTRUCTION. »V
HARNETT REGIONAL JETPORT MONSOON SWALE WHEN UPSTREAM AREAS ARE STABLE AGAINST EROSION AND
615 AIRPORT RD. 0.2 AC. f PERMISSION HAS BEEN OBTAINED FROM N EQ, REMOVE °
ERWIN, NC 28339 ` Q10-0.7 CFS TEMP. SILT FENCE TEMP. BASIN, INSTALL PERMANENT GRADES, ND SEED ALL
AS SHOWN DISTURBED AREAS PER SEED SPECS.
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STEVE ADAMS 0.5 AC. # ��M� ® o
PIN 0597-69-0274.000 S`� �P
BOOK 089E, PAGE 344Q10=1.8 CFS / ASS
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