20061436 Ver 1_Stormwater Info_20061127

FREELAND AND KAUFFMAN, INC.
Engineers O Landscape Architects
209 West Stone Avenue
Greenville, South Carolina 29609
[phone]
FAX [phone]
LETTER OF TRANSMITTAL
Date November 22, 2006
Attention: Amy Chapman
RE
TO Raleigh Regional Office
NC Division of Water Quality
2321 Crabtree Blvd.
Raleigh, NC 27604
[phone]
We are sending to you ®Attached ^Under separate cover via
^Shop Drawings ^ Prints ®Plans
^ Copy of Letter ^ Change Order ^ Disk
Stormwater Management Submittal

The following:
^ Paper Vellums ^ Specifications
^Other
COPIES DATE NO. DESCRIPTION
2 Wet Detention Basin Supplement
2 Grading Plan Sheets
1 5420 Review Fee Check
`~ ~--d-- 11- a1 - o

THESE ARE TRANSMITTED as checked below:
^For approval
®For your use
^As requested
^For review and comment
FOR BIDS DUE
REMARKS
COPY TO
PRINTS RETURNED AFTER LOAN TO US
Copies for approval
Copies for distribution
Corrected prints
NvV 2 "i 2006
^Approved as submitted ^Resubmit
^Approved as noted ^Submit
^Return for corrections ^Return
L"~EiVR - vUA7ER QUALi~"Y
<, ~ ,~,::'~S,~NO STOftMYVATER BRAPICFI
This is the stormwater management submittal. Please call Craig Winnall at (864)
672-3443 with any questions. Thanks!

FR~ELAND and KAUFFMAN, INC.
EhGAEER$ • LAII~SCAPE f~RC~~ffTECTS
Affiliate
Freeland-Kauffman
and Fredeen, Inc.
Bentonville, Arkan5a5
~ ~ - ~ ~-~
November 22, 2006
Ms. Amy Chapman
Raleigh Regional Office
NC Division of Water Quality - 401 Unit
2321 Crabtree Blvd.
Raleigh, NC 27604
[phone]
Re: Stormwater Management Submittal
Proposed Lowe's of Waxhaw
Waxhaw NC
Dear Ms. Chapman:
Enclosed you will find the stormwater management submittal for the proposed Lowe's of
Waxhaw in Waxhaw, North Carolina. This submittal consists of two (2) copies of thewet
detention basin supplements, two (2) copies of the grading plan, and a check in the
amount of $420 for the review fee. Please call or email me to confirm receipt of this
package.
If there are any questions or comments concerning this submittal, don't hesitate to call me
directly at [phone].
Sincer
Craig S. in all, PE
[e-mail]
Enclosures: Wet Detention Basin Supplement - (2 copies)
Grading Plan (SP-2) Sheet - (2 copies)
$420 Review Fee (Check #1 125)
209 West Stone Avenue • Greenville, South Carolina 29609 • Telephone [phone] • Fax [phone]

Permit No. ~ ~ ` ~ ~ ~lv
(to be provided by DWQ,~
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form may 6e photocopied for use as an original
DWO Stormwater Management Plan Review
A complete stormwater management plan submittal includes an application form, a wet detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
I. PROJECT INFORMATION
Project Name:
Contact Person:
For projects with multiple basins, specify which basin this worksheet applies to:
elevations
Basin Bottom Elevation
Permanent Pool Elevation
Temporary Pool Elevation
F~~ . ~ ft.
ft.
53• ft.
(floor of the basin)
(elevation of the orifice)
(elevation of the discharge str•uctur•e overflow)
areas
Permanent Pool Surface Area~~~_~ sq. ft. (water surface area at the orifice elevation)
Drainage Area ~, i~ ac. (on-site and off-site drainage to the basin)
Impervious Area ~ ac. (on-site and off-site drainage to the basin)
volumes
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
1 ~° cu. ft.
~~~- cu. ft.
~ cu. ft.
(combined volume of main basin and forebay)
(volume detained above the permanent pout)
(approximately 20% of total volume)
Other parameters
SA/DAl
Diameter of Orifice
Design Rainfall
Design TSS Removal 2
. ~'~
~~ in.
Q• in.
V~
(surface area to drainage area ratio from DWQ table)
(2 to S day temporary pool draw-down required)
(minimum 85% required)
~~~~~~~
N~iII 2 7 200E
Form SWU-102 Rev 3.99 Page 1 of 4 UEN~ - l~i,`{1~ER t1u~u?~r
~E? IAIVDS A~G~ S? t?RRAW.4?ER BR~IGH

~~ ootnotes:
when. using the Division SA~l:)A t~~bkes, t:kmc correct SAl1~A ratio for pem~anent poet siring shauld be computed based upon the
actlaak imperviaus % arrd perm~rnent paoi dck7tlr. Linear interpalati+.~ti shauld be aarrployed to determine the correct value '1:or non-
standard table: entries.
Tn the 2.0 c;oasta.l counties, the requrLmen.t far a vegetative filter may be waived ii'the: wet detention basin is desi~med to provide
90% T'ss rerrzoval. "f'l~:e NC[)FNR.I3MP ananual provides design tabkes tc3r ksath 85°/~ Tss removal and 9n% TSS r~emc>val.
I:[. iE~E(~lU~i$li.""D I'T1V1i~IS (~;HiEtr;l~:~:~IS ~'
7'he following checklist outlines design requirements per the Stortnwater Best 14~Ianagerricnt Practices IVCanu.al
{i'd.C;. I~epartrnent of .~nviroriment, i-icaith erect 7vatttxal i2esot~rces, i~ebruaty i~~~j attcl Adrnirristrative ~ ode;
Soctic)n: ' ~ a N~'Ar; 2~I .lQt?~:
Initial in the spade provided to indicate the following dosign requirements Dave been. rziet anti supportrng
documentation is attached, If the applicant has designated an agent in the Stormwater Maxaagement l?errnit
~pplicatirn Forrrt, the agent may initial below. II° a x~egeer°~r~~ret has rent been nest, att~~ch j~stlf~:atlcaxa.
~pphcant Entreats
a. 't'he perm<~ncnt pool depth. is between 3 and 6 :feet (required minimum a9° 3 feet).
__ _ _ .___.___ , -- b. Tho forebay vott~me is appro~matoly equal. to ;~U% of the basin. volume.
_ _ ._-- ___._ ..-_-.. c, The, temporary pool controls rttnoff f`rorrt rho design storm event.
_ .... ~'~`_._- ---_... d. "1'he terrtpc)t°at°y pool. draws dowta. in 2 to 5 days,
~" ~__.___. o. if rogni:rocl, a 30-foot vogetativ~: fiiltor is provided at t:he outlet (include n.on~-erosive flow
calculations}
___...__ __:- ~__.___..--- . f, T11c basin length. to width ratio is groatee° than 3:1.
I,~ _ g, The basin side slopes above rho porxnanent pool. a;re rto steeper than 3:1.
_ _.-
_ __. 1~. ~. submerged artd vogetatod perimetor ~holf wittt <t slope of 6: t or less (show dotail).
-------_...__ - i. "~Iegetati.vc; cover abovo tlrc portnanent 1)ctol elovation is specified.
_ _.._.
j. A trash rack ot° similar device; is provided for both the overllt)~v anal orihco.
_- _-__. k:. ~ rc;c:°ot~tle;cl drainage ease;trt.ent is provided fir each. basin inciu-cling ~tc;cess to no<trest rig„ht-
oi-way.
1. fthe basin is used l~c)r sedimcr~t and erosion control during constrttction, clean ott.t o`6:1~0
basin. is specified. prior to use as a wet detention basin.
_. ~___....._ __.. rrt-. ~. rraocl~a.nsrrz is specified which will drain tl7e basit~t for tnaintortanco c)r an ert~c~rgct~~cy.
~..R~o r.r 8y ~~~.6~i Y. .~'~i l'V ~.~.0.1,~ 4.~9.~, 1. °1 ~.D~I~.L't1~E'~.r3. I.~~L.~ .f.`~.1~.~.7 lYffiL~.L. °f1 .1 R~L~~~1~~.. ~~1,..$~C.`~a.~~~r A!a 1.V ~. d:/1gr1..
`t'he; vet detc:tztion basin system is tle;frt.cd cis the wet detention. basin, pretrcatnacrtt irtclt:tding forebays encl. f; ~e
v~;got<:tted filter if ono is providod.
"l"leis systr'ru (~iva~~c~~C rarr~~ U dries da~os neat
`T`his sysi.an (~~~~lr ~~a~~ 0 does does nest
irecopoe°ate a vegetated #iltee° at the outletM
ir~~~~rp~)rate pr°otreatmont ot~ r than ~~ foroha~y~
1°c~rm swtl-tilt Rcv:f.E)t) Ps~,t ~. ? 0£4

aintenanc~.e activities shall be performed as follows:
1. ~f'ter° every si~gxiificant rur-offproducing rainfall event and at least monthly:
a. Inspect the wet detenti.orx basin. system for sediment a,cczatrz~~latian, erosiozz, trash accumulation,
vegetated cover, and general condition.
b. Check and. clear the ox°ifice of any ol7strc~ctions such that drawdown af'the terrrporary pool occurs wif;hin.
2 to S days as designed.
2, :repair eroded areas inzaxzediatPly, re-s(~dd as neccssaz-y to nxaintairz good vegetative cover, rr<aw vegetative
caner to maintain a nx<zximuxn height of six inches, arzd renxavc trash. as needed.
3. Inspect and repair the collection system (i.e. catch. basins, pipizxg, swales, riprap, etc.) quarterly to nx.aizxtain
proper fi~.nct7oniz~.g.
~. remove accumulated sedirrzent [:tone the; wet detention basin system. semi-a.nxxcially or when depth is
reduced to 75°/a cif the origna}. design depth (sec cliaga-azxz bclow~. Tzemovccl scdiznent steal} be clisposecl of
in an appropriate manner and shall be handled iia a m<znn.er that will. not acivcrsely impact water quality (,e.
StaclCj31}.trig near a wet Cleten.tzaT'1 baSrn. Ur strei~.nx, etC;.~.
'1'he measuring device used to deterrrzine the sediment elevation shall be such th~xt it will give an accurate.
d.eptl~ reading azxd not readily penetrate iota accumulated sediments.
'~hcn the perananc;nt pacxl depth reads __, °~"` ____. feet irr the zxxain pond, tla.e sediment shall be rerrzaved.
Then the pcrnrancnt pool depth reads _._.._°__._ .._ feet ire the 1'or~ba:y, the sediment shall lze rerrsc~vecl.
I3r~~SIl~t I~I~ ~ l
lfzr ~~ t~~ r,r~~~5)
t'ez~rnanend; t~aa~ elevation °
Sedi7rzent'~t~.e c~~val tit. _~~~ 75 ~,
_.-_._ ~.~- _-__. ._ se,r~rrncntRerxrov,~lt;levatx>tr„ ___.... 75`lr
_,..__.._.__.. __.Aw~...~..
I3ottorrr tle atr`vLL~Y.__.._..__...-
and °,. %' t3otiorn ~ lc. _. -_ ,a.
v~~trrln _ `~ 25`~/u

l~crnove cattails arts} other indigenocas wetland pla~.xts ~ihen tlxey covc;r SO% of the laasin srarfac~„ "1'liese
pla,zxts shall be encotzs°aged to grew along the vegetated shelf and f'orebay bean.
£~. ,If`the basix~~ rriust be drained for aa-t c~txzerge°ncy or tcz ls~rf~z~:rrz zxz~~inten<zzzc;e, tl~.e f(uslzing ofscdi~ncr~t throzzgh
tl~c e;merl?cncy dl"aiT] shall be mir~irriiced to the rrta~crrznrt~ extent practical.
tae>,:rri ~wF..f-t(t~ lfiev ;3.~~~) k'~~te 3 of"4

Y
I. ~ ~.ll cortapc~ner~i:s efi'th{~ wct cic~te~aati~n basin sysf:en~ shall. be i~n~~itatairae~-1 in ~;c~ca~ cvc~a•~:in~; ordc;r,
l acknowledge grid agree by my signattare below that I am responsible; f€~a° the perf®rrriance of tlae sewn
maintenance procedaare;s listed above. I agree to notify I)yVQ of any probicaris with. the system or prior to any
changes to the system or responsible party.
Print. raarne:__.-~~/o~J___.._....._.._ ......__...._____--- -.. _ .... _._ .__... ...... .... ..._._.... __..._.__..__...._._...°..__..
Note: The legally responsibly party should. clot be a homeowners association unless more than. 50°io of the lots Dave Keen sold and a
resid~,nt ol'thc siabdivisi.on Izas been named the=, presitlcr-t.
~.,.. }
~ ~_ d;~ ~~, I r ~' r- t' t~. V r r ~ ~~ a ~Olaa.~ 1~tablaG ~o~ floe. ~tatf." Of..~'=-`r-.%/~.~_..//./_~."i_~ ~~/RP?_<.~'-.__n
r .
C",o~.anty c)i' <~...r~:i~~ ~r. ~,~ >~~~_~ ~` ~ ---__._._, cln hcrel~y ccrt;ify that ___.~`..`-_fu~1...~~__...~r~~"~ ,_.. ~~. ~ .,..,:m~._~:~.--.__.___.__.________
_ ~
i)errsc»aally appeared before zn~,.thzs .~~ ~+`.... day of~ `..;<, .~ ~_._._:~~ ~~_~,~~~ _--> __r~ ~~~~?.~, and as~knowl.ccil;c the dttc
e~.e;c;tatioaa ofthe° forgoing wet ~ieteration basin rriai.ntenancc recl~.airemcnts. Witness gray hanc:~ and olfcial seal,

Pv1y cornmassiarz o~pire;s- ._ . __ ..~'~ ~. ~~ ~
i~orr~~ s~`J[J~_1t)~ h.yv 3.x)9 1'a~;y ~ a~~f ~
Title: "~ ~~.~. ~