SW6100701_Supplement Form_20101011

pproveu `4:,r .1lt 0':um nis
�onstrJ,tian it, cG,"_rc.°anGr. with !hese documents is t
✓ (� ;. uI
required by t!1e stvcmwater rperrnii. North Caroline Permit No
lbD.ao.neaoerowol
rules require that th 1 storrnwaler system designer
Inspect during certify conformity with the
plans and. specs, a'"tr.'. •,";�i;nt}° :ampliance with the
!-?ormwaler rubs. ; `r:-r, NC C' eH .1008(j
Permit # ,ri�✓Cloop f Date
_
by.,____R :t7>— NC Divisin of VVttat--e:jll p17a';!.v
A:,he
t « MET f?ND _S%ff.. _Rovi ;inr 03tr � ' r�
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NCDENR
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STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This 7Drm mud be fill W Ott prr" and SrnmAW
The RoWed Hem Crredrid (Pert flo must be pri'xed tW out and saemllled ebrrg with st of Ux mqured i trmshion.
911
Pmjed natrne
Traertnoar Vide
Contact Pawn
ChrisloOw RDg n, Enodn E Von, PA
Phone number
919 894-7705
Date
5nt14010
Drainage area comber
1
SM CharaclnFatl[s
Drahap area
2,831,400 fe
krp wvipue area, past-develop—nt
1439,%0 e
% imperlilms
50,85 %
Design rairtaY dtVM
1.0 in
Sewage Vofunw: Won -SA Nawn
Mmrwm votune required
120,D00 R' OK
Vdtme provided
510,482 I' OK, vdune Pmvided is equal b or in execs of volume mgterxd.
Storap Volunr: SA Nsfwa
1.5' runlf vaksna
Pre-devabprrw t ", 244e rvW
Postdewkpmed 1-yr, 244v nxe
M'rninun vdtrne required
Vokne provided
Peak flow Calculadm
Is me prdpost axtd of 7ne 1 yr 24rR storm peak flow required?
1-yr. 24-hr rairidl depth
RaWW C. pledev**rnad
Raborai C, pomAew6aprnero
Raiff InlenW. 1-yr, 24-hrsbrm
Pre-deveiopmsnt 1-yr, 207 peek Now
Pad-developmal 1-yr. 244v peak for
PmPrst 1-yr. 244r peak lbw exed
Ek+ratiors
Tenpmq pod devatim
Perrnanert Pool elevation
SHWT elevaafim (apprmr. st the perm. pod eievan%n)
Top of 14R vegetated shelf dev
Bottom of 101 vegetated shelf elexadan
sediment deenoit, top elevation (hottan of pond)
sedowd dwrn bm= elevation
Sedimert storage provided
Is them additional volume stored above the sW*4equv%d temp. pad?
Elevation of the top of the additional volume
fe
R3
R'
Y ' (Y or N)
3,0 in
0.35 (oni =)
0.64 (unibm)
2.10 irvh 4K
47.78 R'7
44.03 1t�lsec
-3.75 R'h et
17700 6rw
173.50 frrd
173.50 frnw
174.00 krsl
173,00 frn8 Data not needed for calgidw option 01, but OK i provided.
170,50 frrd
16930 krd DM rid needed for cgm4i tion option 01, tiut OK t provided.
i 0000 R
y (Y or N)
177.0 hnsl OK
Form SW401-Wei Deem m Ra Rhr.9 W IVD9 - Path I. a a. Design Summery, Papa 1 or 2

Permit No. 5 `✓0 ! 4' C: 7 r
! to o3 xpvob Cr DWO)
_ > r�, . - .. ., . ' F,';. •a 1 ';. is •.:: i:._ : .
Sarfxa Aran
Area, temporary pool 161,488 Rt
Area REQUIRED, pemhanenl pod 94.942 If
S40A ratio 3.00 (unipessJ
Mae PROVIDED, pemranent pool, A,_.� 88,576 �` OK
Area, bottom of 10R vegetated shelf, Ar,-,w 79.311 R`
Area, sediment deamohA, top elevation (bottom of pond), Ar,-P-1 85,775 fe
Volpmrrs
Volume, temporary pod
510,482 ft3 OK
Volume, Pemta WV pod, Vp, jpd
358,070 Re
Volume, lorehay (sun of br'ebays A more than one brebay)
71.704 Rt
Fom" % of permanent pool volume
20.0% % OK
SAIDA Table Data
Design TSS mrnoval
90 %
Coastal SAIDA Table Used?
n (Y o(N)
Moat *VPm&noml SAIDA Table Used?
y (Y or N)
SAIDA ratio
3.00 (unless)
Average depth (used in SAIDA table):
CaloAi6an option 1 hazed? (See Fyure 10-2b)
_ y (Y or N)
Volume, pamtacWlt Pod, V",,,�
359,070 f
Area P'ovided, permtanftV pod, A.,,,,,,o,
88.$76 R`
Av"e depth cafafated
3.00 It OK
Average depth used in SAIDA, d.,, (Round to mearesl 0.51t)
3.0 R OK
Czhiabon option 2 u wd7 (See Fgure 10-2b)
n (Y or N)
Area provided, pemtanent pool. A,,_,,d
88.576 fe
Area, bottom of 1011 vegeialod shelf, Aw to
79.311 R1
Area. sediment cleanou4 top elevation (bottom of pond). A,,,,_rw
65.775 1t'
'Depth' (distanoe b4 bottom of 10R shell and loop of sedit+ertl)
2.50 R
Average depth raladated
fl
Average depth used in SAIDA, d„ (Round to nearrest 0.51t)
R
Drsardown Calartati ina
Dr'ardorm ttrnhgh orifice?
y (Y or N)
Diameter of orifice (if aredar)
5,00 in
Area of orifice (if-non-drWaf)
in7
Coefficient of dtc"e (Go)
0 60 (unillesa)
Driving head (NJ
1.59 It
Drawdown through weal
n (Y or N)
Weir type
tuns)
[ oelficient of dhsrtiaW (Cr)
ICJ
Length of weir (L)
R
Driving head (H)
n
Predevebprnenl 1-yr, 24-ty peak Apr
47,78 Busse
Pcsl-0erelapn erd 1-yr, 244r peak Row
6.30 Rtrsec
Storage volume discharge rate (through discharge offm or weir)
1.66 R'tsec
Storage volume drawdown time
2.53 days
Additional krlormation
Vegetated side slopes
3 :1
Vegetated shaft &lope
10 :1
Vegetated shelf w9dth
10.0 R
Length d powpath b width ratio
7 :1
Lemgyh to width ratio
TO :1
Trash rack for overflow 8 ordiio-7
y (Y or N)
Freeboard provided
1.5 R
Vegetated filar provided?
n (Y or N)
Recorded drainage eha&cment provided?
y (Y or N)
Capues a1 nmdf at utirtate build-oW
y (Y or N)
Drain mechanism for mai tenence or emergencies is:
�-
OK, draws dorm in 2-5 days.
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
Form Sw40t-NM Dwwwon Ba Rrrr O-Wi 7f09 Part: h. a e. Design S rnnrry, Pope 2 or 2