SW6100701_Supplement Form_20101011 (4)

Approved Starmwet& P arrrllt Documents
Construrlion in accordance with these documents is j C✓� (u .�� O
Permit No.
required by the stormwater permit. North Carolina(Jo beP-VdedbyDWQ)
rules require that the stormwater system designer
Inspect during constru::tlon; certify conformity with the
plans and specs', and certify compliance with the
stormwater rules.( 15A NCAC 2H .1008 (j) )
Permit# S�✓Cloo fin/ bate l!'r 1ra
by NC Division of Wato Q ality
Cher:t #_wF� r3ND SN/Y Revision Date 5 1°rr° �A of w�tF4
O pG
HICKM
� 'c
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This roan must be W ot4 pied and ub mb'ed.
The RaWsdftm Ono) at (Paul 110 must bepited, Mad out end suanded akxtp WM dof die required inlbrmation.
:e�•C'.h-y-,i"i -� • -F: — �_ �,.`•Ir. ��.ti',.• -rem-i,a• f"N.•�•.
77
Propd narne
Tr"noor Wop
ConbC petsm
CIN ftO 0 Ropers, Enodm FirphW%, PA
Phone number
819894 7765
papa
S11pQ010
Oralnage area number
1 T—
-MEW T
Sid U►woCbrhrtlea
Drainage area
2,931.400 fly
ImmViots am. prstAevdopmM 1.439,860 tr
% inpervieua
50,85 %
Design rairdW depdm
1.0 in
Skwagr Votuma: lion -SA W*M
MMinun Volume required
Volione provded
storage Volume: SA wars,
1.5' runoff vokma
Pre-devebpmerd 1-rr, 244v nrKA
Post4evelopment I-V, 24fir runoff
Minimum Volume rewired
volume pveided
Peak Mau Cakelibm
Is the pre4md corArd of ire l yr 20r Storm peak flow req,*W?
1-yr. 244r ruin depth
Ratiww C. pe�evdopmant
Rational C, post-de+elopRant
Rana) lneensity:1 •yr, 244w storm
Pre-devdepment 1-yr,"peek tips
Post-devefoprnaM 1-yr, 244Y peak low
Preftst 11r, 244v peek Dow control
Elmatiorra
rtmporary pod dt3ratidm
Permanent pod elevation
SHWT'eieva un (appmt. at the perm. pool elevation)
Top d toff vegetated shell devotion
Bottom of 10R vegetated shad elevation
Sedimert dwmut, pop devation (bottom of pond)
Sediment deffo botlam elevation
Sedmene storage povOW
Is hire additional volume stared above time state-mquirad temp. pods
EWvWm of the top of the additional volume
120,000 ft'
510,482 f,
OK
OK Volume provided's equal b oa in excess d volume requhed.
R'
R3 .. r
na
r? R1�
I? /-) a°
y (Y or N)
3.0 in
0.35 (Witless)
0.64 (urimess)
2.70 nmr OK
47,78 R'!sx
44.03 ff'lsec
3.75 ltalsec
r AL
9517
i�
�`•.'�'.G 1 N ��Q b�.
m.0o Ins!
173.50 fmsl
173.50 Imsl
174.00 hnsl
173.00 his! Data not needed IN C*UlabM op6ptt $1. tail OK 0 provided.'
170.50 Imsi
169.50 ins! Data not needed for c 4mlapon option 01. but OK if pviided.
1.00 It
y (Y or N)
177.0 Ind OK
Form SW401•Wet Detnitim BaarRw.m3WIM9 Pens 1. & u, Dawpn Sunrtiry, Peps 1 of 2

Permit No. •S
00 b3 pfoYax by DWQ)
7
SurfarA Anies
Area. Iernpixary pool 161,488 f?
Area REQUIRED, permanent pool "2. —84.942r?-
SACA ratio 3.00 (uri6ess)
Area PROVIDED, perrnanerd pool, A,_,_xd 88.576 iY OK
Area. bolforn of 1 Oft vegetated sheiff. A,,_,, 79.311 ft'
Area, sediment deanooA top devation (bottom of Pond). Aw_,,d 65.775 ff
Volurros
Volurne, temporary pool
Volume, perrnarient pool, V'.'W
Volume, brebay (sum of brebM if rnore, than one biebay)
Forebay % of pem~ pool volume
SAIDA Table Data
Design M removal
Coastal SAIDA Table Used?
MouritaWoedrnont SAIDA Table Used?
SAIDA ratio
Average depth (used in SAIDA table):
Calculation option I used? (See Figure 10-2b)
Vol", permanent Pod, VW.-PW
Area provided, permanent pod, Ap-,pd
Average depth calixilated
Average depth used *in SAIDA, d., (Round to nearest 0.51t)
Ulciultation option 2 used? (See Figure I(Qb)
Area pr-0ed, permanent pod, Ap—_"
Area, bottom of IN vegetated shell, Ab&.#,,
Area, sediment dearoA top elevation (bottom of pond), AwLpom
-Depth' (distance b1w bottom of IN shelf and top ofsediinierill)
Average depth calctiated
Average depth used in SAIDA, d— (Round to nearest 0.5ft)
DrMWdQWrr C4kU11bDft
Drdwdmn ftmQh orifice?
Diameter of orifice fill 6irctiar)
Area of orifice
CzeMcient of dWiarge fCo)
Driving heW (Hj
Draw~ ftmigh weir?
Weir type
Coeftient of discharge (Cj
Length of we: (L)
Driving head (H)
Pre -development I -yr, 20r peak flow
Post4evelcipment 1 -yr, 24-W peak kw
Storage vol unne discharge rate (through disctorge orifice or weir)
Storage vd" dirawdow time
510,482 irl" OK
358,070 ft"
71.704 ft'
20.0% % OK
90%
n CY or NJ
(Y or N)
3 DD (unftss)
y ' (Y or NJ
358,070 ft'
88,576
100 A OK
10—ft CW
n (Y or NJ
88,576 fe
79,311 fe
65,775 re,
2.50 ft.
y (Y orN)
5.00 in
0.60 (undm)
IN (y or N)
(ems)
47.78 e1w
6.30 f0jsec;
1.66 e/sm
2.53 dap OK, draws down in 2-5 days.
AddRINW khxmabM
Vegetated Bide dopes
3 :1
OK
Vegetated &W slope
10 :1
OK
Vegetated shell width
10.01
OK
Length of swpah to width ratio
7 A
OK
Length to width ratio
7.0 :1
OK
Trash rack for civerlow, & orifice?
(Y or NJ
OK
Freeboard provided
1.5 ft
OK
Vegetated filler provided?
n (Y or M)
OK
Recorded drainage easorent provided?
y (Y or NJ
OK
Capures all runag at ubnate build out?
y (Y or NJ
OK
Drain macharism for maintenance or emergencies is:
Form SW401 -Wei Detention BasiiFRev 8-WI7/09 Paft L & 11. DesW Surnfrnwy. Page 2 of 2