SW5140801_Plansheet C-3.1 - Existing Drainage Area_20220923

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PRE —DEVELOPMENT
ANALYSIS
BASIN
FLOW
FLOWRATE
POINT
DRAINAGE
TYPE
Q1
Q2
NOTES
AREA
(CFS)
(CFS)
(AC)
/
A
SUB -BASIN 'A'
3.80
TOTAL
4.48
6.71
ANALYSIS POINT 'A'
Q POST < Q PRE
B
SUB -BASIN 'B'
1.24
TOTAL
1.14
1.83
ANALYSIS
Q p
/ SPRAYED
POST <OINT PRE'
CONCRETE
BUILDINGS
STORM WA TER
SUMMARY
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(REFER TO CALCULATION BOOKLET FOR ADDITIONAL INFORMATION)
AYED
CRETE
.DINGS
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♦� V vvv vv vx� ��°� ��'_� �� j �� DRAINAGE AREA TO ANALYSIS ♦ ,// i
v v �� �� DRAINAGE- AREA TO ANALYSIS \ \ ���� POINT 'B' = 1 �4—AC
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T ESPA S III V A ♦ / /
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FIRNGING
RAE
SIGN
\ FIRING
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73 _ __ ___----
RANGE ROAD S. R. 1610
60' RIGHT OF WAY
-------- -------------------------------------
18" RCP 11
I N V=472.2011
Q
♦ \ NOW OR F MERLY
\ \\ \ ♦♦♦ '' 1 I� STATE OF ORTH CAROLINA
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♦♦ /49A ♦ II i -- J/10
ANALYSIS POINT 'A'
ANALYSIS POINT 'B'
eTOTAL SITE AREA = 714,000 SF (16.40 AC)
PROJECT AREA = SITE AREA - SURFACE WATER AREA
705 913 SF (16.21 AC)
r DRAINAGE AREAS TO ANALYSIS POINTS
pm No
1 :1 ( PRE -DEVELOPMENT BUILT UPON AREA (BUA) _
21,356-SF (0.49 AC / 37. OF SITE)
THIS DRAWING IS FOR NCDENR REVIEW. DO NOT USE
FOR CONSTRUCTION
GRAPHIC SCALE
40 0 20 40 80 160
( IN FEET )
1 inch = 40 ft.
CLH
DESIGN
CLH Design, PA
400 Regency Forest Dr
Suite 120
Cary, NC 27518
Phone: [phone]
Fax: [phone]
LA: C-106, PE: C-159
��9 c*GINEE y
1888111111111,40
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DRAWN BY: FJS
CHECKED BY. KAL
DATE: 8-21-2014
CLH PROJ. NO: 14-121
S. C.O. ID#: 14-10860-O I A
PRE -DEVELOPMENT
STORMWATER
MANAGEMENT MAP
BID SET
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