SW6210204_Plan (Ex. DA)_20210422

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UGPUGPUGPUGPUGPUGPUGP
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UCATV
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INV. IN=264.36'UGPUGPT
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XXXMETAL
STORAGE
BUILDING
FFE=266.86
270 270265
270270
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INV. OUT=263.34'
18" RCP
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A
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UCATVUCATVUCATVUCATVCONSTRUCTION LIMITS
CONSTRUCTION LIMITS
CONSTRUCTION LIMITSCONSTRUCTION LIMITSCONSTRUCTIONLIMITSCONSTRUCTIONLIMITSCONSTRUCTIONLIMITSS1°14'17"W329.72'S1°47'43"E50.00'S9°41'43"E29.30'S86°02'17"W
496.13'N11°40'43"W411.20'N86°02'17"E
580.19'266267268269 272272 270271272273273269
269
265261261
262
262 263264 2662
6
7
267
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2
6
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6
0 2612
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2 26126226326226
3
26
5
264
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26
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4
26
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6
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263
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261 268267268266267263262
263
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269 267
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4266 268
269
267
267
267
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2
6
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266
26
7
264262
261264 268269
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6
7 268268
SHWT BORING 1
ELEV.: 260.20
SHWT
BORING 2
ELEV.: 260.00
SHWT BORING 3
ELEV.: 259.50
SHWT BORING 4
ELEV.: 261.33
SHWT BORING 5
ELEV.: 261.50
SHWT BORING 6
ELEV.: 262.50
ANALYSIS POINT A
ANALYSIS
POINT B
B
A
SUBSURFACE
DETENTION
ASSEMBLY
(SEE SHEET C5.6)
JOB NO.
SHEET NO.
SCALE
DESIGNED BY
CHECKED BYDATEDRAWN BY
DATEREVISION DESCRIPTIONYOUR VISION ACHIEVED THROUGH OURS.5410 Trinity Road, Suite 102 | Raleigh, NC 27607TEL [phone] FAX [phone] www.timmons.comTHIS DRAWING PREPARED AT THERALEIGH OFFICEN O R T H C A R O L I N
AP R O F E S S I O N A
LE N G I N E E R
0 3 3 6 1 2N O R T H C A R O L I N
AP R O F E S S I O N A
LE N G I N E E RN O R T H C A R O L I N
AP R O F E S S I O N A
LE N G I N E E RN O R T H C A R O L I N
AP R O F E S S I O N A
LE N G I N E E R
S E A LN O R T H C A R O L I N
AP R O F E S S I O N A
LE N G I N E E RN O R T H C A R O L I N
AP R O F E S S I O N A
LE N G I N E E RN O R T H C A R O L I N
AP R O F E S S I O N A
LE N G I N E E RF R A N C I S S L I N S K Y, I I I2020-DEC-01
NCNG RAEFORD POV & MOV EXPANSION305 TEAL DRIVE RAEFORD, NORTH CAROLINA, 28376, NCNG# 3720140172 / SCO# 18-19694-01A43358
J. LEWIS
F. SLINSKY
F. SLINSKY
PRELIMINARY PLANS
FOR REVIEW ONLY
DO NOT USE FOR CONSTRUCTION
NAD 830
SCALE 1"=30'
60'30'
C3.1 PRE-DEVLOPMENT STORMWATER MANAGEMENT PLAN1" = 30'
ANALYSIS POINT A
DRAINAGE
AREA
(Acres)
COMPOSITE CPRE-DEVELOPMENT
3.82
Q1 Q10
0.62 7.24 11.42
EXISTING IMPERVIOUS (BUILT BEFORE 1997)
NOTE: POST-DEVELOPMENT FLOW IS LESS THAN PRE-DEVELOPMENT FLOW AT ALL ANALYSIS POINTS.
REFER TO CALCULATION BOOKLET FOR ADDITIONAL INFORMATION.
Q100
14.83
EXISTING IMPERVIOUS (BUILT AFTER 1997)
PRE-DEVELOPMENT IMPERVIOUS AREA AND WATER QUALITY TREATMENT
PRE-DEVELOPMENT STORMWATER QUANTITY CONTROL
ANALYSIS POINT B 1.34 0.65 2.15 3.49 4.66
PRE DEVELOPMENT ONSITE IMPERVIOUS SURFACES (BUILT BEFORE 1997) = 2.16± ACRES
POST DEVELOPMENT ONSITE IMPERVIOUS SURFACES = 3.75± ACRES
IMPERVIOUS AREA REQUIRED TO BE TREATED = 1.59± ACRES
IMPERVIOUS AREA TREATED WITH STORMWATER FILTERS = 1.59 ± ACRES
STORMWATER QUALITY CALCULATIONS
DRAINAGE AREA
TIME OF CONCENTRATION FLOW LINE
TIME OF
CONCENTRATION
LINE AREA 'A'
TIME OF
CONCENTRATION
LINE AREA 'B'