20061855 Ver 3_Stormwater Plans_20071211

oz-2oso
' Sto~mwate~ Management Calculations

P~~,Y~~nE~~,
~EC,~El,~'~`~
1 Wal+Mart Supercenter
~ Store No. 4447-00
~ Site Plan Submittal
~ Raleigh, NC
1
~{
„~, , ~ rx tG`~J ~l ~,,ti
..~ r~ ~ - 4mq ~% t [.. - .
~~ ~ q_..e 4
.
i _
~_C
{`p'_"~~ n ~ `~~ ~~~ ~w~ ~~'~°"~~
Prepared for:
{~~
4
Inc.
Wa1~Mart Stores
,
Sam Walton Development Complex
2001 SE 10~ Street
' Bentonville, Arkansas 72716-4050
t

^ 1 ^ Kimley-Horn
1 and Associates, Inc.
©Kimley-Hom and Associates, Inc. ?007

1

1

This document, together with the concepts and designs presented herein, as an instrument of service, is intended only for the specific
purpose and client for which it was prepared. Reuse of and improper reliance on this document without written authorization and '
adaptation by Kimley-Horn and Associates, Inc. shall be without liability to Kimley-Horn and Associates, Inc.

WAL~MART SUPERCENTER STORE N0.4447-00
SITE PLAN SUBMITTAL
RALEIGH, NORTH CAROLINA
STORMWATER MANAGEMENT CALCULATIONS
Prepared for:
Wal~rMart Stores, Inc.
Sam Walton Development Complex
2001 SE 10~' Street
Bentonville, Arkansas 72716-4050
Prepared by:
HIMLEY-HORN AND ASSOCIATES, INC.
4651 Charlotte Park Drive, Suite 300
Charlotte, North Carolina 28217
APRIL, 2007
015476046
iu~~o
eA
,....,
ESS
~~/ V eeeeeH~e .~ `~
North Caroli a PE No..030861 i~~~e~lfNli~„~P~~,,`

TABLE OF CONTENTS
OVERVIEW
EROSION AND SEDIMENTATION CONTROLS
SOIL STABII.IZATION
STRUCTURAL CONTROLS
CONCLUSION
SITE MAPS
SITE LOCATION MAP FIGURE 1
FLOOD INSURANCE RATE MAP FIGURE 2
USDA SOIL CLASSIFICATION MAP FIGURE 3
USGS QUADRANGLE MAP FIGURE 4
IMAP SHOWING PARCEL AND PIN NUMBER FIGURE 5
IMAP SHOWING AERIAL FIGURE 6
WATERSHED MAPS
PRE-DEVELOPMENT DRAINAGE MAP FIGURE 7
POST-DEVELOPMENT DRAINAGE MAP FIGURE 8
WATER QUALITY CALCULATIONS
STORMWATER POND DESIGN SiJNIMARY
WET DETENTION BASIN CALCULATIONS
POND DRAWDOWN CALCULATIONS
CONTROL STRUCTURE DESIGN (WATER QUALITY OR IFICE)
CONTROL STRUCTURE DETAIL FIGURE 9
EXTENDED DETENTION WETLAND CROSS SECTION FIGURE 10
WATER QUANTITY CALCULATONS
TIME OF CONCENTRATION CALCULATIONS
PRE VS. POST CURVE NUMBER CALCULATIONS
STORMWATER SCHEMATIC DIAGRAM
PRE-DEVELOPMENT ROUTING INPUT
PRE-DEVELOPMENT HYDROLOGY
POST-DEVELOPMENT ROUTING INPUT
POST-DEVELOPMENT HYDROLOGY
POST-DEVELOPMENT ROUTING RESULTS:
(2-, 15-, 100-YR, 24-HOUR STORM EVENTS)
RIP RAP APRON CALCULATIONS
NITROGEN CALCULATIONS
EXTENDED DETENTION WETLAND PLANTING AND GRADING PLAN

C PY F
O O U.S. ARMY CORPS OF ENGINEERS SECTION 404 GENERAL PERMIT
' NCDENR DIVISION OF WATER QUALITY LETTER
JDE MAP

1

1
t

1

1
OVERVIEW
STORMWATER MANAGEMENT CALCULATIONS
Wal-Mart -Raleigh SE (Sunnybrook)

VIEW
OVER
Background
This report has been prepared to support the Site Plan Submittal for the proposed Wal-Mart
' Supercenter Store No. 4447-00. The approximately 32.6-acre project site is located in the
northeast corner of the intersection of Sunnybrook Road and Rock Quarry Road in Raleigh,
North Carolina (see Figure 1).
t
l
i
s:
ng componen
ow
The project consists of the fol
• Development of the Wal-Mart Supercenter lot and outlots located along Sunnybrook
Road and Rock Quarry Road, which includes the infrastructure required to serve the
proposed lots.
• Five retaining walls for the proposed Wal-Mart Supercenter, one of which will surround
the extended detention wetland, and two which will protect wetlands and a stream.
' A stormwater management system comprised of an extended detention wetland and a
level spreader.
Flood~lain/Floodway
The proposed site does not contain areas within a 100-year floodplain boundary as determined
from FIRM Panel # 37183C0551E and 37183COSSSE, dated March 3, 1992 (see Figure 2).
Streams/Wetlands
based
th
l
h
i
ans, are
e p
own on
te, as s
The existing stream and wetlands located within the project s
on information provided by S&EC and have been field verified by the USACOE and the
NCDWQ. See the attached exhibits, the NCDWQ Letter and USACOE Map. The stream is
located near the northeastern portion of the project site and the wetlands are located through the
center of the project site. A proposed retaining wall has been designed to minimize impacts to
' the stream and wetlands.
Site Topog aphy
' The existing topography of the site ranges from approximately 270 feet along the southern
portion of the property to approximately 210 feet along the northeastern portion of the property.
The areas of the existing wetland and stream are wooded. The remainder of the site is generally
covered with light vegetation, consisting mainly of grasses. The project site will be cleared of all
vegetation on the interior of the site and vegetation will be preserved along the road frontage as
applicable and in most areas near the stream buffer.
Water Quality
Stormwater Best Management Practices (BMP's) will be used to minimize impacts on water
quality to meet State and local requirements. The majority of the site will drain to one proposed
extended detention wetland to treat stormwater. The extended detention wetland has been
designed to provide 85% total suspended solid (TSS) removal and to reduce the project site's
nitrogen export to 9.43 lbs/ac/yr. The permanent pool of water in the wet detention pond is
Stormwater Management Calculations
Wal-Mart Supercenter Store No. 4447-00
Raleigh (SE), North Carolina

designed at 3 feet. The extended detention wetland has been sized to treat the entire site for
water quality except for those areas surrounding the pond, which are to remain pervious and
minimally disturbed.

1

1

Water Quantity
The proposed extended detention wetland has been designed using ICPR to address the City of
Raleigh's water quantity requirements to match pre-development and post-development peak
runoff rates for the 2-year and 15-year 24-hour storm events per a condition of approval from the
City of Raleigh. A spillway for the proposed extended detention wetland has been sized to
convey the overflow of the 100-yr, 24-hour storm event into an existing tributary of the Neuse
River.
Conclusion
The proposed stormwater measures were designed using methods prescribed by the
aforementioned resources. Based on the analyses provided herein, the proposed systems will be
adequate to address the stormwater requirements of the City of Raleigh.
SCS t~letttod Pre-Devela nt Post-Devela meet

Drainage Area
Area (ac) 2-YR
p~k ru:rtcaff
(cfs) 1 ~-YR
peak ruruaff
(cfs)
Alga (ac} 2-YR 1' S-YR
p..ak peak rurtcff Pest < Pre?
runoff (cfs}
DA-1A' 33.52 - - - - - -
DA-98* 12.37 - - - - - -
DA-1 - 39.295 112.Qc~7 - 37.845 111.55 YES
p{~2 17.48 25.178 61.434 12.11 2©.928 45.824 YES
DA-3 2.38 2.376 7.4x8 2.311 2.875 8.259 NQ**
GA-4 21:.31 28.1119 73.803 21.43 29.178 73.736 NC;<'°'
TOTALS 87.12 87.92
1 t?2tr~TOle, €t~el'rIPOR 1`S 3CC~t~tc371G
"` DA-9A and GA-1 B afe subareas c~ DA-1
*' Thg °fo ~iffefgnre for the 2YR & 15Y'R storm e+r~t t~`t~~reen pre and postdevglopn~ent are 21.©"~ artd 13 _fl°!° respecti~~gly.
""* TF~g °#° difference for thg 2YR sto~'t]l e'vgnt beh,~.reett ~ and postdevelopmgnt is 3.8~!n.
Stormwater Management Calculations
Wal-Mart Supercenfer Store No. 4447-00
Raleigh (SE), North Carolina
2

SITE MAPS
STORMWATER MANAGEMENT CALCULATIONS
Wal-Mart -Raleigh SE (Sunnybrook)

SITE LOCATION MAP
STORMWATER MANAGEMENT CALCULATIONS
' Wal-Mart -Raleigh SE (Sunnybrook)

1
W E
S
Q=a WAL-MART SUPERCENTER SITE LOCATION MAP FIGURE
#4447-00 NOT TO SCALE
Kimley-Hom and Associates, inc. RALEIGH, NC ~
n.s na,.o~r. ,oaE,~ i.~x ,~ oawtris wo omwa ~m ~. u ~ .sna~rt ~ ~. a Mom au rnR ,~ ruro~ wo atxr wR wow, a w v~rr~n. ~
of No ~wapot imwKZ a na oocuort wmour emto~ wmo~~ No m w~sr-~aa~ no ~aa~R ~ ~wi. ee rmaur uam m w~tr-riaa no tiasoaats ~

FLOOD INSURANCE MAP
1
~~ v~cmvrlt~~n MANA(rC11~NL (.;4LC'ULATIONS
N'al-Mart -Raleigh SE (Sunnybrook)

1
1
1
1
1
1
1
1
1
1
1
1
1
h~ I NRPDNLL MDD INSUR,IMR PNDGRRN
J v (Brr~irr .90 $IrprYrr ~) ~ ..- ~ ~ ,-I NIRhDRRL i1LDD IMSURIUICE PIDGRAN
$. '.
~ ~ fir. y M ~i ~,~ I ~~
~~ _ ~,, f ~~". ~ = . 3 I i FIRM ~~ I,,~'' FIRM
-'Y'~~~~,.: I, i FlAOD INSURANCE RATE NRP i III' I ROOD INSURANCE RNfE MAP
''~ `.` - ,`~f I '. WAf:E COllNTY, I ~ I WA}:E COUNTY.
~~,uu~ ~'~ Crty Of T]..1 e1g}~ 1 ~ NORTN CAROLINA AND ~ I NORiH CAROLINA AND
.~M,a t`9~~ `- - _ ~Ql 11 1NCORPCIRATID AREAS i lNCORPORATED AREAS
:~ fl>U~ Extraterritorial Jurisdiction ~ ° ,. ~ ~ ,
a rnNU 9sefD1 elo .~~..., IJ ~ rNxu sss DF RiD. .....
~~ ~ _ 370243 ~`~ ~_ ` 999NB N~ ,. o
'~~ ~ ~ ~....rr .~ ~a ,_~ III - - -
- I~~ II ~
NE X
ZO
~,
II
r NAP NUMBER ,~ ' NNP NUNBEk
ZONE X inlim991 E 3n93tD559 E
EFFECOIE DAR EFFFLIIYE DAR
NNtl21 3. 1991 ~ NAR01 3, 1992
/ 'FtlvJ E,enp.eP RL~~n At~l
1~
~e51,
U
r _
CORPORATE LIMITS -~ .~ '~''
a~ fi '
~ ,~ ~~.
20NE X ~' ~ ~ E
~ ~~' ~ ~~
ZONE X
I ~~
I City of Raleigh
370243
~ City Of Ral
SITE 370243
`~ z5az CORPORATE

0
=~ WAL-MART SUPERCENTER F.I.R.M. PANELS:
#4447-00 3718300551 E AND 3718300555 E
Kmley-Hom and Assoaates, inc. RALEIGH, NC SCALE: 1" = 600'
7M3 OOQ11E11E. 700t1tQ MIN TIE OOIIC8IS ND DE9~I3 Fi®Rm 1£1101. A3 AN pBIWNQIt OF 2ERVICF D MEIOFL ONY FOIL 71E FiM'OBE NO QF]II FOR Mql R MAS FiB~PMt>D. IFA19E
OF AND NNOPFR IEIWILE 011 l9LS DOCINOII MIIIOUE MRIiF71 A110101RAlOM AIO AOWWI011 9P NNNEY~90IN1 AIO AS90CIAIFS NIG 911A13. RE MOpUI IARiIIY iO IOlLE1~-IgIN MD I69DO~OF$ NG
ZOt
FIGURE
2

USDA SOIL CLASSIFICATION MAP
STORMWATER MANAGEMENT CALCULATIONS
Wa!-Mart -Raleigh SE (Sunnybrook)

USGS QUADRANGLE MAP

' STORMWATER MANAGEMENT CALCULATIONS
Wal-Mart -Raleigh SE (Sunnybrook)

P~ [Q25476 Vnl-Mart SFteGvR X46 Rate SE CSurn W [me [E~tts oVlc -t~ ~ _
~ ~ `..~'
eF._ ~ ~` ~~ e' ~ " ~`' ' ~~ ? ~ ` ~~ ~ . .. ~~
.,
j ~
= e:•~ ,fir _ .~j ~'`_ ~t ; c , ~--~ 3 i'1 ~` _ - ~'~
F i III... ~y ~ ~~ ~ =. ~.y ~ ~ @
~` c
F
~. ;. ~ ~ ~ ,~_ ~_.-`~.~r„ _ s ~ key ~`~4
~~ _ ~„ ~ - - __ _ y~ f _~"-°~ -
' =
-.
~ ~ ~ ~'~ 1 i F~ '. ~ ~ ~` 3 ~ ' ~~
' ;~ r~wJ.. t ]..X"'cgs' Z~'. .r~.~. ~ _ _ k 0~.-.
'` ~ `~ icy ~} t~~ ~t ' t ~~ ~'' - i
- _
4 ~ -
I ~ ~' ~ ~ _ ~ 'ti tq ~ ..~ 1{ ~ ~ z
~ ~ ~ ~ , F ~ ~,.'
r
`~ _ ~ ~ _ --
z _
~~ ~ ~~~ ~~ ~ ~ t
M ~~`~ _ ~ ~~~~. ~~ ~.~~~. ~-fin *~`F5r ' [•t~_- _ ~iL 5i~.Ti 1 I ,~T`~.~r/__a.+s "r
' E t' ` ~ '~ ~ ~ aM f ~. ~ ~'~ t K S~ .ice ~ t-~.T• ,~~ ` ~ 6_ ~ ~ ~- ~~ `~'~' ~r
,; 1 _
J - F
~` fir' ~~ i~ +~rX` : "~~'~ ~ ~ r~~ ~~ s ~°.~ : _ d_`-:
..~
~~ -.
~ ' '~ "';
4 _~ r1~ . ~ ~i f~ ~S ' ~4y`,~'~ -~Z ~ 'J 1~ ~ }}~ t Ji~• !'4.. [ ~ y '.. ~*.,,~"~~ ~ f
_ - ~,~r ~ ~_ j p
~'"~~~ .tr ~'= ~,_ ~ ~ k, _ ~ `,~~ ~ i k~1 t .r~r` _ ~ i sir ~'
.. ... ~ _ tit
,_ - ~~
r
~..
..
-
~`~`'`~ x
~. .,
~-
~; ~•, ~ ,'r ~~ r ~ ` a~'Y
.c'n~1 _ ~ t _: 4 ~ ~`S i _= w:, r i'='~'~`~,~.. , ~ ~ ,a _ ~ ~ -~. . ~ .d fit.
=~ WAL-MART SUPERCENTER USGS QUADRANGLE FIGURE
' KimleyHom and,4ssociates, lnc. #4447-00 GARNER, NC (1993) 4
RALEIGH, NC SCALE: 1 1000
ns ooandr toaenfn wni ne ~a uo at~aa r~+rtn ~~ a w~ Nsrmn~r aF ~. a moots oNx ran ne No aart ran wHa R ~ r~rMm. ~
ov no v~tn ~~ aM ne noanar rinwart nmtd Nmandanx wo ~awwon er -~r-+-~a wo wssoa~ats. ~ swi. ee rmaur uanr m baFracw~ pro ~ssoa~at~ Nc

IMAP SHOWING PARCEL AND PIN NUMBER
STORMWATER MANAGEMENT CALCULATIONS
Wal-Mart -Raleigh SE (Sunnybrook)

o~
~~ a
; ~
v ~
_ ^
g ~
y~
2 y
No g fOW~
R ~ ~Np
~ m
~g
Sp
A
~o ~
NNA
y A t
i
g~ ~ ~
o= r
° ~ G7 •A C
~~ _~~
0 o rn
Z o
C7 ~
A~
__ rn
o~
~~ m
~ Z7
~~
K
~a
a
ma
E $
~g
SS
7 ~
A
x f
?; ~
x
A
>~
o~
~A
~8
~~
~ , - FEATURE INFQRMATIUN
nAap Coordinates
', rt CUD NBA-' " K:2423188.7807385314
~. I ~,JI) 7() 141 F2Al.i~' )=.13
,. ~" ~ I T E r 7z7ddd .7011010d62
nl 1449 LiL
Parcels
~ / 1722373788
~~ Sr»~ 4838 7086820Q73®
U %,
i'~ '"<,y
t : ~ "!" ~~ -ti R.a.leigh Zoning
f j~{~ awn~ar ~~ ~ ~' '~ ~'~~_ oswaw6
..
~ddrasa ;°~" ~ ~" R•70 ~ tlov
~" ~` C~ ~~~ 11 '
.nee pQrc"al num z • 19ae
Ji accnuni num R,g • t,oa,eee
~~'>~
`~='
~~ interaacticn CU D TD ~~.~
cuu ro
~~~. n 2"26d 998
ik}buF#pr ~ --~~~
r ~ ~ ,ooe ~I
1~7gonsJ l `~~~``--..~ ~} GM- ~~ .~•
j ~~,~ ~}
to en ~ y.,. ~ ~a
Y ~ ~- d fff ~a `~ r' tl '
7 in =747 it
~. ~
p -r
~ x ~ Aa .. CaJ~ .~. 25
Real Estate Data and ti~ a R-4~ ~_ e3aa 7419A96rA74
Revenue Depu'hnent ~ F
- v ~ ~~~~f.~` ~, Plannln~ Jurisdictlan Boundary
~. r~. €~:: L~s:~137:,'. O ~ ...__ r l e ~ RALEIGH
Fuquay-Vacvu ~~ 1~ , f. ~ I ~f-i -~ `r t Ra
~~~ 8133811B92~,8826
Ralei`h Zsniae
lyalce FoiestZoninq '' Adjacent Counties
Soils Legend ~~g~
6iGalk~~rAKe
Floodah,inDaia ~@Q8005 828782381
! ~ !
Electoral Districts
Administrative Districts
Parks-and Greenways
Cultural Facilities J

V
0~
P
P
h
h
m
m
T
~ C
rn

IMAP SHOWING AERIAL
' STORMWATER MANAGEMENT CALCULATIONS
Wal-Mart -Raleigh SE (Sunnybrook)

'. ~a s~. ~ i .~ ~.~.-
~~
• ~ -~ t~ ~ ,~~ _ .~~, ti~~
a ~ ¢ ~
.:.
`b..~` ,, ~ ~ -~
i~ _
•~`
~W:ElC _ ~ r,r ¢
IF
Y f+u_
~~~yyy 'e
s:,., ~.
. ;
s
~ `
rj Y i .R ~"
t'r •ir'' , i irk
~ .. ~ ~r
}}
tt ~• - ~ ~
'rte ~~:." .r,~ elf ~rv J~-~
~: 4 . 7 t
1 en = 625 ft ~ , ,~" ._,~- _ ,'f` . ~`~_~~~,-~,
~~ ~-
S
~ >
r l
..Y
Y_~ . -.~_
~.
.t.
~ ~~
__ ~ a-+..~_3
f ~
~ F
6
E
a=~ WAL-MAR~T4447POORCENTER IMAP FIGURE
Kimsey-tiomandAssociates,~nc. RALEIGH, NC AERIAL INFORMATION 6
716 OOCMR7IL lOOERQ MIX 1NE CONCFAIS ND 061016 PIRg]Ilm XE1~7~ A4 MI NSIIMEM OF gJMOG 0: piflRID OIL7 FOR 7NE PUIP09E ND ClF]If FOR MRCX R MlS PIEPAIFD. REIBE
OF NO Y710PF]l IE3AlICE ON 716 OOOIRE7R MOIOIR MRiBI NIIXOIM/Oldl MO AMF'WgN M IYtY-IIdW NO M500IOFS NG 9W1 6 MI{RIIR LM611Y 70 glEl~-110tH NO IIMDOI17E7; NC.

WATERSHED MAPS
' STORMWATER MANAGEMENT CALCULATIONS
Wal-Mart -Raleigh SE (Sunnybr•ook)

P:\015476 Wal-Mart SiteCivil\046 Raleigh SE CSunnybrook)\Calcs\Storrl\EXHIBITS\SWM Exhibits_recoverwork,dwg
0
O
~, ~`~
:a
I ,.. .
r
,
~ ,_ ~;.
;, , '
,,
„ „
,.
~`
O..` ~ ,
:.
.,
,.
C ~,
..
-~ ,
- ,
c
a. - ! ,
r .~
h-~'
_.
,. ,
r,^%~
~Li . ,
\:
~ ~ I t r~~
a
I I r
1
~,
~. ;
~'~",~~
,~ _ ~ ,
`~ ~ ( (~
A
+~
~g
~ ..1 I ..v,,,r t ` .
, ,: a.
~r. ..: ~....... _ t'
~~~
i. i \
, ,
~•.
_
, CJ~ . ~ . r Z • I I ~I Z _. = - - .. , \ fir- ^^~, ~~i~r~
O ,
, _.. ~ ~"
70 m ~ ., , ~,,..;~ - - - - - ~.,,.
f~
~:,.. _ 4;
~S (,~ . "
....
_ -
~ '
3 i,.
~7
/ ',.~ ~ T
~ - _ ' ~ ~ -~
~7
_. _
. ,. /r
-~ '.
~' ..
.`, ,,
..
,
, _
,~ ~
III
,, ~ ., i JIB Z.\ - _ ~ ~`~ I t.. \ Y
., /~ ,
I ~ . ~
• { IN •,~
... ,
'I
- _ _
_.
,,
~ -
~ i.: .
~„~~__ ~
~~
,
/~ F II; .. ::,~, Ili `' __ \\ ~~~,, \. ~, ®.~ ~~,.
, ~ /~ /
, I
!~ ~ ~
L \\
' ~\ r = \\gS \`~ ~~
I~ \
~p \ t '
! I t~ ~~
• \
;~ •.'~1) ~.\`.`~\.\.\ 1\ • .i t ~i ~ ~ltl):'.~~ ~);1II\ ~ii~),\~ L~\ ~ 't7 --i ~ ~ ® ~~
-o ~ ;. , '6~!" \;'1~\i t~\\\.~\\ •~\ ~ -- , / i.~!!,t/ /l~lit`lllll.lll,l I`l i~~,;'F ~1 ~ ~ I~_, Z ~ g
',. a
v ~i~Fl~ \\ \ \\\'~,~, \ `~ \'' /tI ////.r ,~/~ 't•\,i}tL~il\ ;~ i,1..'f~ W ~ ~g~ _ ,
I , ,
G7 _ , 4Y~¢~'~ Y .`• \ \ \ \,~ r' '\~I~i !/ '% t, \ I I ~.~ F~} i~J- ~.. ~sa~ !
-- '.V I!5'!!IiT \\.. \t ~,\\ 1, l I 'S A 1 (((f /JI) / \\ \ ` ~„x ! ~ ~ ~a, ,~
r v1j_
o ~ L:~r~ -~ ,1 i l I l l` 1 `~~\~ • / Ill) ~li'11 I ~ !~(/ ~ ( i i t \ . ~~ . \^t i~ r 'fv ~' • • '. I
Z I 1 f 1 j ~ /~ : j f~~llllll l,% }l ~ \ ~ ~~ ~ C1 'a
w tr'i '~~~^ l ~I(~ 11~ ;'~~''. ~ I j 11 illifr ((; ,\ ~ '' \ \ , r \ ;~' p _ ' w •
o w ~ r 1~ l ~I~d ,ii, I II}ill,llll1a lj~1t ,,~,\~\, .;~.. , . „~I ly ` _ qI.
°o a '"/~,'Ill~,ill~lJlr.: .i ~,!(j(t%I(!jl(Ir.{•tt~} I \1 \ ~,1\~'I~ ,,per
~' ~ ~ , l I (! :; ~ ! % "';+,, / ~l `~ ' ~ } ":~ t ..111 ,,- ~ ~ •'
f(I~I (j Ir r / // ri i~//~ll!, ~li I \\\ ~. ~.. II \ ! A ~ $'"
• /' }~ Yr~(I,t~IJ ~ ! , ;'/ j/i~.~/ ~ r ~l (l \ t_// ~Il ` f!o• ~ ~°~
/ '~ j(Illl~lllllti'lh~lll '. r ~ j~// r'~'` ( 1 r~.- i / ~ // 91t , ',' ~., ~~ ~ ,
\ l 'Ili e ~ \ .... 4 ~~ I / 'i 'i / .~ ~
"
,~ 1'!t\11y,}~\`_,-mow Y ,~,,,; rl,/i,`..• w-1`I\ ~~ ~ ~~
,.
~, ~, %~; /~ ,~~'+11;11,l~"ts'J'~l`~~"`\,~.~ ~° '\Iit1 ' ll~ ,a ~'
III ~` \' ( ~~ /~ ,.~1\\\ ,\\ ~ ~ ~~1a!I l i~ _ w:~ I- A ,~.
' \ ~\ I)t
rn.
.,
Ti~ f,~
,. ,, ,~1i) ~ ~.
C
r , ~s
, ,
~ ~ w
I A. ,.
•
-r
., ~ ,
r ~ ~ ~ ~ ,-Fit I~/r~~: ,... ~... .. '''~,
~ N•
O
~ •
a ;
I,
r
r - ~
~ '. ', .
., ,
. , :..
\ ,
~ Kimley-Ham
^~^ andAssoc)ates,lnc PRE-DEVELOPMENT FIGURE
,A51 CHARLUT,E PARK PMVE WAL-MART SUPERCENTER
CRARLOITE, NQNN GAROUNA I911J DRAINAGE MAP
5ONE J,P #4447-00, RALEIGH, NC (RALEIGH SE)
PROSe fJOq JJJ-mm
FAN: (JP,) 3JJ-OBeS
THIS DOCUMENT, TOGETHER VA TH THE CONCEPTS AND DESIGNS PRESENTED HEREIN, AS AN INSTRUMENT OF SERVICE, IS INTENDED ONLY FOR THE SPECIFIC PURPOSE AND CLIENT FOR WHICH IT WAS PREPARED. REUSE OF AND IMPROPER
Prl,eu~r nu Tule nnr, PlruT u,TUrv IT wPITTiu ellTUnPlTennu eun enePTe nnN RV Ylu1 rV-NnPN eNn eeennle Tre IN!` eH All PC WITNn11T IIARII ITV TD MINI FV-Hl1PN 1NR ACCnF.Id TFC INf.

015 al- ar Site Iv) 046 aleigh SE CSunnybrook)`Gaits\Storrn`EXHIBITS\SWM Exhibits_recoverwork:dwg
--i
O
:C .
. '~ '-1
~, / '
r ,
.,
_.. .. ,
__.
~,
_,
~ ~ :
O ~ ~ ,
,. .. `.
O
. ,
C - .
, ~
a , '.
4
1
r- ,I~~ v
I E~J)
i ..
~~ ~uu.~
1
•~~ f
~ • ~,, ~Nrl , ~ II y
r
11
~,~ ' '
~ -
•, Z '
;,
e
I j
,~
-, ,
II
: ' tl
. ~ Q
~'... ' ~~.... ~ R.
T ~ •' g
i : ~y
b
..
r..._.
, ~
5 .~,. ~~+ ~~ \ Ii~ c0 N
L ~ .. . •..` ~, .. ~ a~,,.,,:~ . as
r.
..,
~ ,
~- ~
_r~
~. ~ i I I ' -
_ ,
__
~.
\ -
b ,~
\ ....
. •, ~ ~- _
;~ r
~'
`,
- .
F \ i
,; ' 1 % ~ `
...
I
-.
1 .
,,
q~,
,
.~ v , ' ~+1
Y
• r ~ I .~I
of : - '' .• - -
..
,, I,`n Q , ~ I _ _ ~`
' .. ..
.`
.. -
. _ ;.
-, _ , .
,
, , '~ •
~ L? _~
..
. .1
~_
: .
.~ _ ,
~ ~~'
u
t
l
- • . ,.
11,~ ~ ~~1\~1-:+~, ~,!~ , \ .~., // ~ ~ /+ i4`~;'I \ III I i , I i ' 1 0 ° ~ _I~ _g= .
1
to ~ ~'~1 ~`\i\\\\\ ! ! ~ `r %,;~.~ ~\•\,; r,r ~ ..
,'
- I 1 1 r•. , G7t" / ''.; ! A.' ! • , 'o. \ . \ ~ ~ 717.:... +t
' •., ~ ~ / • ,.~'~$~°i`( \\I ``fills:\\ \ \!\\ ~ '~+-1/ "; ~ ')'~', 50 Vf ~ A
r
1~ ~, 1
~ 144 ~. ~\\!\`\+\• ~j i)~I ~,` fltl(~ i%~' `~ I \ ~.~ ~ irk. c7 '- ~ >E~ ,,
~• ", ~ a ~ ,; I,1r~l I i`' ~~ ~ ' r ~1~1 ~M1 Ill ~%~" 1 '~
..
~( ~ n 'i/ - Illi ll~ll l,:{i'~ iii %~^ \; i)I~~.~ 1,1~1';``'11 \ ~~.!- ~- ,~' I & ~ ,,~• ~:
o ~ w cn •' I)Illilll11 ~+rrrr, ~r i. .. r,,.~r'~ ~r~r ~11~ j I I, 1 !i ~ i '.o •
!.
v ,IILI~II~'ii,J i,,~. / /,i ~rfr,1',1 1~1
° ~~°j , ,.. 1 ;r ' ~~' j % ,i/.~. ~; it (i l~~ -. ®~~
~~, ~~ v
l,.
r '/ ~ -; riliJldrlf`jl+ll;~' ; f11L /;~// lr~:'lii .i]l ~; ; ~ ~I-~. ~~ ~
f ,/ r'fi .III~)i'ilrll~,I~Illliii' i/ ~ ;~' , ~ i/+ / + i _ _ • ~ ~ ~. ~
-,' i
.,:, , , I
l ~:~ ~
~I ~.1 ~ 1 \\~~~ `fi -~ - ~~ .fii /r',--\ ~ ~I~11 I .. s= ... ._.. ELF ~\ ~
:
_ !/
~~/ J`~~~ I~n~i, ~ ~ ~i ~i~?filf~ i ^1 l 1 ~i
I~/ ,~ ~ _ ~ cs' I' 111.. I r \ i 1 i ~ O~ \ II
,..
I ~
i ~..~ ~~ - v p,++ i I
.. ~ ~~. ~ ~
_,
• ,
• . ~ ,- o •t
p..
i
,..
.,. ,
C'
a. ,
/ - r ~ r, ~ .
I~ 3
j ~
:
f ~ r
~~ -A',~ I r ~ ~~1~
p ~ I ~~A~
p ~ ~-~,,>.~P
~ ~ ~\~
h ,
~.
r _ ,. ,
_.
r- `~ .y c'~ -1 v
~ `~ z-p
.I~ y
.. _~ a Z
y .,,, ~r~
,. ,' _,, to n~
o~rn":
r •~. ~ ~a
„~
. .
...
,. N
?.
W
,~
^~^ KimleyHam
,BS, CHAR- PMIt oga~ndAssaciales, Ins WAL-MART SUPERCENTER POST-DEVELOPMENT FIGURE
CHIRIOTiE. NORM CAROLINA 18211
SNI~ ]~ #4447-00 RALEIGH NC (RALEIGH SE) DRAINAGE MAP 8
PHONE: (101) ]]]-RIJI
EAM: (701) ]]]-OBIS 1 1
THIS DOCUMENT, TOGETHER WITH THE CONCEPTS AND DESIGNS PRESENTED HEREIN, AS AN INSTRUMENT OF SERVICE, IS INTENDED ONLY FOR THE SPEGFIC PURPOSE ANO CLIENT FOR WHICH IT WAS PREPARED. REUSE OF AND IMPROPER
RELIANCE ON THIS DOCUMENT NITHOUT WRITTEN AUIHORIZAl10N AND ADAPTATION BV NIMLEY-HORN AND ASSOCIATES. INC. SHALL BE WITHOUT LIABILITY TO NIMLEY-HORN AND ASSOCIATES. INC.

WATER QUALITY CALCULATIONS

STORMWATER MANAGEMENT CALCULATIONS
Wal-Mart -Raleigh SE (Sunnybrook)

1

WET DETENTION BASIN
CALCULATIONS

STORMWATER MANAGEMENT CALCULATIONS
' u'al-Mart -Raleigh SE (Sunnybrook)

' /~~ Kimley-Horn
~ ~ and Associates, Inc.
' WET DETENTION BASIN
' Project Information
Project Name: Wal-Mart #4447-00, Raleigh, NC (Raleigh SE)
KHA Project #: 015476046
Designed by: JMH Date: 3/13/2007
' Revised by: Date:
Revised by. Date:
' Site Information
Sub Area Location: DRAINAGE AREA #1
Drainage Area (DA) = 25.97 Acres
Impervious Area (IA) = 21.18 Acres
Percent Impervious (I) = 81.56

Required Surface Area
Permament Pool Depth: 3 ft
SA/DA = 3.42 (85% TSS Removal via Pond)
Min Req'd Surface Area = 38679 sf (at Permanent Pool)

Required Storage Volume:
Design Storm = 1 inch (Project Does Not Drain to SA waters)
Determine Rv Value = 0.05 + .009 (I) = 0.78 in/in
Storage Volume Required = 73909 cf (above Permanent Pool)

Elevations Area (s.f.)
Top of Pond Elevation = 230.00 ft
Temporary Pool Elevation = 224.00 ft 41465
Permanent Pool Elevation = 222.00 ft 40389
Maint. Shelf Beginning Elevation = 222.00 ft
Forebay Weir = 222.00 ft
Maint. Shelf Ending Elevation = 220.00 ft
Bottom Elevation = 219.00 ft
Wet Basin AreasNolumes
' Area @ Top of Temporary Pool = 41361 sf
-
Area @ Top of Permanent Pool -
40390 sf
' Volume of Temporary Storage = 81751 cf
Is Permenant Pool Surface Area Suffici ent (yes/no)?
Volume of Storage for 1"Storm = 81751

(Elevation =
(Elevation =
Yes
Yes
224.00 )
222.00 )
40390 > 38679) sf
81751 > 73909) cf

i

/ ~ /~ Kimley-Hom
\ ~ I ,and Associates, Inc.
WET DETENTION BASIN
Project Information
Project Name: Wal-Mart #4447-00, Raleigh, NC (Raleigh SE)
KHA Project #: 015476046
Designed by: JMH Date: 3/13/2007
Revised by: Date:
Revised by: Date:
Site Information
Sub Area Location: -~
Drainage Area (DA) = 25.97 Acres
Impervious Area (IA) = 21.18 Acres
Percent Impervious (I) = 81.6 % (Drainage Area)
Orifice Sizing
Q2 days = 0.4731 CfS
Qs days = 0.1892 Cfs
Width of Orifice = 5.50 in
Height of Orifice = 2.50
Q o~~ = 0.45 cfs
Drawdown Time = 2.1 days
less than 5 days (yes/no) ? yes
greater than 2 days (yes/no) ? yes
(Flowrate required fora 2 day drawdown)
(Flowrate required fora 5 day drawdown)
(Inches)
(Inches)

POND DRAWDOWN CALCULATIONS
STORMWATER MANAGEMENT CALCULATIONS
Wal-Mart -Raleigh SE (Sunnybrook)

H-d ro
N
~ H
rat N U
O U U U U U U U U U U U tz U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U
~
~
~
~
~
z
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~ G
~' d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
~d~d~d~d~d~d~d~d~d~d~d~dFd~d~d~d~d~d~d~d~d~d~d~d~d~dFd~d~d~d~d~d~d~d~d~d~d~d~d~d~d~d~d~d~d~d~d~d~d~d~d~d~d~d~d
000000000
~` ~
a o0000000000000000000000000000000000000000000000000000000000000000000000000
~ d

S E E EE z E~ E E EE ~ E EE SEE ~E EEE E ~E E E E E ESE
~me~c~~mm~m~c~m~m~r~mr~e~m~~mm~m~m~e~mm~mmme~e~mm~~e~~c~mmm~m~mm~c~~m~me~e~e~~~r~mc~e~m~~mmme~
H H H H H H H H H H H
~~
~
~
~~
y mr
e
e
mc
H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H
P- rororororororororororororororororororororororororororororororororororororororororororororororororororororororororororororororororororororororororororororororororororo
0000000000000000000000000000000000000000000000000000o z
a
000000000000000000000000000000
7d7d~d~d~d~d~d7d~d7d~d~d7d~d~d7d~d~d~d~d~d~d~d~d~d~d~d~d~~d~d~d~d~d~d~d~d~d
7
~
~
~
~
7
7
~
~
7
7
~
~
~
~
7
~
~
~
~
~
~
~
~
~
~
7
~
~
~
~
~
~
7
~
~
~
7
7
~
~
7
~
7
~ m
d
d
d
d
d
d
d
d
d
d
t3
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d

a
7y
0

maaa~tummwmw m m m4v mmmm m mmm44oo romc~ mma,mmwm Sqa7mmmmtomm mm a~mm mm m mrommammmrom rammmmmm mmm
~~+~YT~?~9~~?~~? ~T~? T~T~~T~YY~~~q? T~?~~Y~T~YT ggYY~~T T ~? 9~7~r~?~~? ~~q~~gb~gqq~q? Y? ~T~?~~~~q
N N N N N N N N N N
~
~ n
o
G
~ ~
~?~~T ggYY
Y
N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N
mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm ro
p, mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
-
.
.
('1
M'

W ODW JJJJJ~]JJ~] ~]OI O~O~O~OI OI Ol O~01 O1 VI V11J1 V1 V~lfl lJt Vf l11 VI Ja ~P ~P ~P iP iP iP iP ~P ~P W W W W W W W W W W NNNNNNNNNNHNNNNNNNNN
P W NNO~D 00 JOl Ul Ja W NNOID OJJOI O~~P W NHO~O W JOI OI iP W NNO~O OD ~]OI O~iP W NF-`O ~O OD JO~01 ~p W NNO~D W JOI IJI ~P W NF-`OIpN ~]Oi V~~P W NNO
JO~UI
~

H
.~~{
~
/"'
`~ i
DW
NNO
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W O r4 '~
N (D
© N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N
N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N
N N N N N N N N N N N N N N N N N N W W W W W W W W W W W W W W W W W W W W W ~'
0 N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N
N 000000000000000 F-` N V-` NN N~-'r' ~-'F-`~"' N~''r` H NNNNN N W W W W W iP iP iP ~P OI V11J1 UI O~O~O~J J J J00 W ~D 10 ~0000N F' NN W W W ~P ~P ll1 V1 O~O~ J J OO N~OO
VI Ol 01 Ql Ot Ql J J J J 00 OD N lp ~O O O O N N N W W ~P 111 N Ol J W lD N N W lJt Ol W O N iP O~ OD O N VI J O N O~ OD H ~P ~] O W Ol l0 W 01 O iP J F+ lfl \D W J N 01 O ~P ~D iP OD W W W CO W OD W~ iP O
P N N N W lf1 O N Ol N J iP N O O O N W U1 W W 00 W O ~] VI iP iP lfl Ol OD N Vl ~D N N Oo V1 iP W W W Ol J O iP O
l
l rt
IT a
R ~
D O
~
OD O N iP ~] l0 N ~P Ot l0 N 01 ~O N Ol O iP l0 iP ~O V1 N J ~P !-` b ~ J ~] Oo O iP OD W
N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N
aaaaa~aa~aa.aa~a~aa~aa~aaa~a~~aaa~a.na~c~~aaaaaa,aaaaaaaaaa~a~a.aaa~~c~a~na~a.nau~aa.u>aa.a~a.c.a~~aaaaa.na~aa~
n lP 111 01 (ll 01 VI VI lT V1 Ul OI 01 (fl VI V~ Ul VI VI VI VI 01 VI Ul lIl lT 111 V~ 01 VI VI Ul (fl VI lJl VI O~ lJ1 Vl lJl Ol V1 Vi OI VI OI VI
1 Vl VI lf1 ll1 lT N l
w
N'r
.
OI Vl Vl Vl Vl V1 Vl U1 OI VI Ul V1 (II lJ1 Vl Vi VI Ut N lJ1 Vl V1 VI Ul N VI lJl lJl IJI lJ
00000000000000000000000000000000000000000000o f
ar-
~ o0000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000o rtm~q
~] o0000000000
CD
r

O
aaaaa.aa~a~.n~~aaao~naaa~a~a~a~aaa~a~aaa~aaa~a~.a.aa~~c~.a~aa.aaa.aa~~~aa~aa.aaa~~~.a~aa~caaaaaa~a.aa~aaaaa.n
00000000000000000000000000000000000000000000000000000000000ooooor•rrrrr~rrrrrrrr~~rrrr
rn m m m m rn rn J J J J J a m oo m w oo ~~ ~0 ~~ o 0 0 o N r r-~ r r N N N N W W W ~P iP iP G
h
yr+,
M'{ a
O
((Q a a a ~c a a~ a a ~a ~ a a~ a a a~ a a~ a ~a ~a a a a ~a w a in to vi O+ to in in ut in to m
N N N N N N N W W W W W W ~P iP ~P ~P iP O~ VI OI Ol Ol O~ J J 00 00 ~O l0 O N N N W iP Ul 01 J 00 O N N W 01 T W ~O F-` N ~P Vl ~] ~O N W iP 01 00 O N VI -.1 ~ N W lT ~] O N iP J ~O N iP J lp N ll1 OD O W Ol
P Ol OD O N iP J ~O N lfl 00 N U1 W W J N J N ~O V1 W O l0 W ~] J ~] OD l0 N W 01 lp N Ol N tP H J W 1D J iP N N lD ~D ~O ~O ~D O N F~ N ~P O~ ~O N OI OD N ~] N J W ~O Vt N O J V1 VI
J
O N W rt N (]
N a (D
.
~ i
N N W iP Ot
00

C)
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 H
M O
• 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0000000000000000000000000000000000000000000000000000000000000000000000000000000000o
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 O N rt
rooa
N$ N
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
O
G
0000000000000000000000000000000000000000000000000000000000000000000000000000000000o Mo
00000000000000000000000000 HN 1-'r'~--` F' H F-`F' 1-' N NN N N N N N NN N W W W W W W W W ~^~ ~^~~ ~'P 'P 'P ~'P ~'P 'p' ~ N~ ~ N~ NNE N W N ~~~~
N NNNNNNN W W W W W~~~~~ OI Ol O~ Ol J W W ~O O O N W ~P Ul Ol J W \O O N N W iP (J~ Ol J CO lD l0 O N N W iP V1 01 J N ~D O N N N W iP VI 01 J W ~O O H N W iP VI OI Ol J CO ~O O N N W
J Ol Ol V1 iP iP W N N H O ~O ~O N J O~ O~ O~ iP W W N F' O O l0 W J Ol Ol V~ ~P W W
~
` O ~"'rt
1'T O a
N~ r'
O 00 W
O O
N N W iP V~ Ol Co l0 F-' W V1 J ~O N iP J O W O~ O ll~ l0 iP O O~ W N l0 ~O O N W Vi J a Ot N N J~. W W N N I--
C
O H
~` O
~y o000000000000000000000000000000000000000000000000000000000000000000000000000000000o
000000000000000000000000000000o aHa
rnpr
~ o000000000000000000000000000000000000000000000000000
CD
C
.-~
O o
~o
M
N

POST-DEVELOPMENT
Simulation DRAWDOWN
Node
Group
Time

hrs
Stage

ft
Warning
Stage
ft
Surface
Area
ft2
Total
Inflow
cfs
Total
Outflow
cfs
Total To
Vol In Vol
of
DRAWDOWN WET POND BASE 83.03 222.057 245.000 40420 0.000 0.020 0.0
DRAWDOWN WET POND BASE 84.03 222.055 245.000 40419 0.000 0.019 0.0
DRAWDOWN WET POND BASE 85.03 222.053 245.000 40418 0.000 0.018 0.0
DRAWDOWN WET POND BASE 86.03 222.052 245.000 40417 0.000 0.017 0.0
DRAWDOWN WET POND BASE 87.03 222.050 245.000 40417 0.000 0.016 0.0
DRAWDOWN WET POND BASE 88.03 222.049 245.000 40416 0.000 0.016 0.0
DRAWDOWN WET POND BASE 89.03 222.047 245.000 40415 0.000 0.015 0.0
DRAWDOWN WET POND BASE 90.03 222.046 245.000 40414 0.000 0.014 0.0
DRAWDOWN WET POND BASE 91.03 222.045 245.000 40414 0.000 0.014 0.0
DRAWDOWN WET POND BASE 92.03 222.044 245.000 40413 0.000 0.013 0.0
DRAWDOWN WET POND BASE 93.03 222.042 245.000 40412 0.000 0.013 0.0
DRAWDOWN WET POND BASE 94.03 222.041 245.000 40412 0.000 0.012 0.0
DRAWDOWN WET POND BASE 95.03 222.040 245.000 40411 0.000 0.012 0.0
DRAWDOWN WET POND BASE 96.03 222.039 245.000 40410 0.000 0.011 0.0
DRAWDOWN WET POND BASE 97.03 222.038 245.000 40410 0.000 0.011 0.0
DRAWDOWN WET POND BASE 98.03 222.037 245.000 40409 0.000 0.011 0.0
DRAWDOWN WET POND BASE 99.03 222.036 245.000 40409 0.000 0.010 0.0
DRAWDOWN WET POND BASE 100.03 222.035 245.000 40408 0.000 0.010 0.0
DRAWDOWN WET POND BASE 101.03 222.035 245.000 40408 0.000 0.009 0.0
DRAWDOWN WET POND BASE 102.03 222.034 245.000 40407 0.000 0.009 0.0
DRAWDOWN WET POND BASE 103.03 222.033 245.000 40407 0.000 0.009 0.0
DRAWDOWN WET POND BASE 104.03 222.032 245.000 40407 0.000 0.008 0.0
DRAWDOWN WET POND BASE 105.03 222.031 245.000 40406 0.000 0.008 0.0
DRAWDOWN WET POND BASE 106.03 222.031 245.000 40406 0.000 0.008 0.0
DRAWDOWN WET POND BASE 107.03 222.030 245.000 40405 0.000 0.008 0.0
DRAWDOWN WET POND BASE 108.03 222.029 245.000 40405 0.000 0.007 0.0
DRAWDOWN WET POND BASE 109.03 222.029 245.000 40405 0.000 0.007 0.0
DRAWDOWN WET POND BASE 110.03 222.028 245.000 40404 0.000 0.007 0.0
DRAWDOWN WET POND BASE 111.03 222.027 245.000 40404 0.000 0.007 0.0
DRAWDOWN WET POND BASE 112.03 222.027 245.000 40404 0.000 0.006 0.0
DRAWDOWN WET POND BASE 113.03 222.026 245.000 40403 0.000 0.006 0.0
DRAWDOWN WET POND BASE 114.03 222.026 245.000 40403 0.000 0.006 0.0
DRAWDOWN WET POND BASE 115.03 222.025 245.000 40403 0.000 0.006 0.0
DRAWDOWN WET POND BASE 116.03 222.025 245.000 40403 0.000 0.006 0.0
DRAWDOWN WET POND BASE 117.03 222.024 245.000 40402 0.000 0.006 0.0
DRAWDOWN WET POND BASE 118.03 222.024 245.000 40402 0.000 0.005 0.0
DRAWDOWN WET POND BASE 119.03 222.023 245.000 40402 0.000 0.005 0.0
DRAWDOWN WET POND BASE 120.01 222.023 245.000 40401 0.000 0.005 0.0
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.
Page 2 of 2

CONTROL STRUCTURE DESIGN
(WATER QUALITY ORIFICE)
1
STORMWATER MANAGEMENT CALCULATIONS
Wal-Mart -Raleigh SE (Sunnybrook)

POST-DEVELOPMENT INPUT: CONTROL STURCUTER DESIGN (WATER QUALITY ORIFICE)
Name: CS-WET POND From Node: WET POND
Group: BASE To Node: OUTFACE-1
UPSTREAM DOWNSTREAM
Geometry: Circular Circular
Span(in): 30.00 30.00
Rise(in): 30.00 30.00
Invert(ft): 219.000 216.000
Manning's N: 0.013000 0.013000
Top Clip(in): 0.000 0.000
Bot Clip(in): 0.000 0.000
Upstream FHWA Inlet Edge Description:
Circular Concrete: Square edge w/ headwall
Downstream FHWA Inlet Edge Description:
Circular Concrete: Square edge w/ headwall
Length(ft): 140.00
Count: 1
Friction Equation: Average Conveyance
Solution Algorithm: Automatic
Flow: Both
Entrance Loss Coef: 0.500
Exit Loss Coef: 0.500
Outlet Ctrl Spec: Use do or tw
Inlet Ctrl Spec: Use do
*** Weir 1 of 4 for Drop Structure CS-WET POND ***
TABLE
Count: 1 Bottom Clip(in): 0.000
Type: Vertical: Mavis Top Clip(in): 0.000
Flow: Both Weir Disc Coef: 3.200
Geometry: Rectangular Orifice Disc Coef: 0.600
Span(in): 5.50 Invert(ft): 222.000
Rise(in): 2.50 Control Elev(ft): 222.000
*** Weir 2 of 4 for Drop Structure CS-WET POND ***
TABLE
Count: 2 Bottom Clip(in): 0.000
Type: Vertical: Mavis Top Clip(in): 0.000
Flow: Both Weir Disc Coef: 3.200
Geometry: Rectangular Orifice Disc Coef: 0.600
Span(in): 20.00 Invert(ft): 224.000
Rise(in): 8.00 Control Elev(ft): 224.000
*** Weir 3 of 4 for Drop Structure CS-WET POND ***
TABLE
Count: 2 Bottom Clip(in): 0.000
Type: Vertical: Mavis Top Clip(in): 0.000
Flow: Both Weir Disc Coef: 3.200
Geometry: Rectangular Orifice Disc Coef: 0.600
Span(in): 24.00 Invert(ft): 226.500
Rise(in): 10.00 Control Elev(ft): 226.500
*** Weir 4 of 4 for Drop Structure CS-WET POND ***
TABLE
Count: 1 Bottom Clip(in): 0.000
Type: Horizontal Top Clip(in): 0.000
Flow: Both Weir Disc Coef: 3.200
Geometry: Rectangular Orifice Disc Coef: 0.600
Span(in): 48.00 Invert(ft): 228.500
Rise(in): 48.00 Control Elev(ft): 228.500
~„~~'rcv Q~cl ~~
0~;~~~
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc. Page 1 of 1

CONTROL STRUCTURE DETAIL
STORMWATER MANAGEMENT (,ALCULA[luN~
Wal-Mart -Raleigh SE (Sunnybrook)

Wnl-Mnrt SiteCivil\046 Raleigh SE
4'- 0"
GRATE ELE
CONTROL ST
4' X 4' PRECA
DRAINAGE STI
W
STEEL GRATE USF
#6615 OR APPROVED
EQUAL
10" ORIFICE (2)
LEV. = 225.00
8" ORIFICE (2)
_EV. = 224.00
2.5" ORIFICE
_EV. = 222.00
SLUICE GATE FOR
'ERMANENT POOL DRAWDOWN
PIPE
.00
JRED INVERT TO
:VENT STANDING WATER
_ RISER BOTTOM
(INVERT OUTFACE PIPE)
=~ WAL-MAR~T4447POORCENTER CONTROL STRUCTURE FIGURE
IGmley-Homandassociaies,lnc. RALEIGH, NC DETAIL g
THIS DOCUMENT. TOGETHER WRH THE CONCEPTS AND DESIGNS PRESENTED HEREIN, AS AN INSTRUMENT OF SERVICE, IS INTENDED ONLY FOR THE PURPOSE AND CLIENT FOR WHICH R WAS PREPARED. REUSE
OF AND IMPROPER RELWJCE ON THIS DOCUMEM WTHOUT WRITTEN AUTHORIZATION AND ADAPfAT10N BY KIMLEY-HORN AND ASSOCIATES, INC. SHALL BE WITHOUT UABILf1Y TO KIMLEY-HORN ANO ASSOCIATES. INC.
6'-0"
r ~
ORIFICE ELEVATION

i

' EXTENDED DETENTION WETLAND CROSS SECTION

1

1

STORMN'ATER MANAGEMENT CALCULATIONS
Wal-Mart -Raleigh SE (Sunnybrook)

o~
>~
~;
o~
A° 3 ^
m £
° m ~ 1'
Z ~
~m w
°
o ° Ui
m
fg
a°
0 0
$ `~
F
~o D
s A ~
g ~ ~ ~
>> ~~
> _ -1
o~ ~~~
m
m~ _~~
;~ Zom
~~ n n
°m m
i m Z
~~ m
°° ~
s=
i ~
mA
F °
0 0
a c
A
0
x F
L
o F
rn
o
in
A°
s
~~
TI
~ ~
O C
m
s' 1 z'
BERM AQUATIC
SHELF
ESTABLISH) '`
VEGETATION TO
PERMANENT POOL
ELEVATION. SEE
PLANTING PLAN ON
THIS SHEET
FOREBAY
CONTRACTOR TO APPLY 12"
COMPACTED SOIL LINER MADE
OF SILTS AND CLAYS WITH AT
LEAST 60% FINES
P
O
l
h
i

SEE WETLAND GRADING AND PLANTING PLAN
FOR DETAILED GRADING IN THIS AREA
5'
VARIES
SEE OUTLET CONTROL
STRUCTURE DETAIL THIS SHEET
LOW/HIGH MARSH J
ELEVATION VARIES
(0-12")
OUTLET
MICROPOOL
TYPICAL SECTION

TOP OF BERM
TOP OF SPILLWAY:
SIDE SLOPES = 2.5:1
WIDTH & ELEVATION = SEE
TABLE BELOW
LINE W/ ENKAMAT 7020
AND FGM FROM PROFILE
PRODUCTS
i
n I'II~III"II
II II ~ I ~I Ill~ll III
II I I I II II II .I IIII
I ',1I I I- ~ ~ 1
II II I it l i ~ i~~l I''II J._,
,~. ~iii~. I I ~''il II ~~
EXISTING GROUND
OUTLET PIPE
EXTENDED DETENTION WETLAND
TOP OF BANK = 230.00
SPILLWAY ELEV. = 228.50
SPILLWAY WIDTH = 100'
TEMP POOL = 224.00
PERM POOL = 222.00
BOTTOM ELEV. = 219.00
2-YR HWL = 225.93
15-YR HWL = 228.33
100-YR HWL = 229.08

1

t

1

WATER QUANTITY CALCULATIONS
STORMWATER MANAGEMENT CALCULATIONS
Neal-Mart -Raleigh SE (Sunnybrook)

1
STORMWATER POND DESIGN SUMMARY
1
' STORMWATER MANAGEMENT CALCULATIONS
Wal-Mart -Raleigh SE (Sunnybrook)

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ i ~ ~ ~ ~ ~
C ~„ Kimley-Hom
~ and Associates, Inc.
Pre- & Post- Development Summary
24-Hour Storm Event
Project Information
Project Name: Wal-Mart #4447-00, Raleigh, NC (Raleigh SE)
KHA Project #: 015476046
Designed by: JMH Date: 3/13!2007
Revised by: Date:
Revised by: Date:
SCS Method Pre-Development Post-Development
Time of 2-YR 15-YR Time of 2-YR 15-YR
Area Curve Numbe Concentration peak runoff peak runoff Area Curve Number Concentration peak runoff peak runoff post < Pre?
Draina a Area (ac) *
(CN) (Tc)•* (cfs) (cfs) (ac) *
(CN) (T°).. (cfs) (cfs)
33.52 67.6 19.46 - - - 91.2 5.00 - - -
DA-1 A***
12.37 63.2 21.99 - - - 66.0 16.60 - - -
DA-1 B***
- - - 39.295 112.087 - - - 37.845 111.555 YES
DA-1
17.48 72.9 17.65 25.178 61.434 12.11 76.9 17.65 20.920 46.824 YES
DA-2
2.30 61.3 5.00 2.376 7.438 2.30 64.2 5.00 2.875 8.259 NO****
DA-3
21.31 69.5 13.80 28.109 73.863 21.43 70.2 13.80 29.178 73.736 NO*****
DA-4
TOTALS 87.12 87.12
/ IIGI GIVI G, VGLGIIlIV1I IJ Pl.rli G~./IVVIV
* Curve Numbers from "TR-55, Urban Hydrology for Small Watersheds," pages 2.5 to 2.8
** Time of Concentration calculated by TR-55 methodology
*"* DA-1A and DA-1B are subareas of DA-1
**** The percent difference for the 2 YR and 15 YR storm event between postdevelopment and predevelopment are 21.0% and 11.0% respectively.
***** The percent difference for the 2 YR storm event between postdevelopment and predevelopment is 3.8%.
P:1015476 Wal-Mart SiteCivil\046 Raleigh SE (Sunnybrook)\Calcs\Storm\Runoffnew.xls 1 of 1

' TIME OF CONCENTRATION
CALCULATIONS

STORMWATER MANAGEMENT CALCI~LATIONS
' Wal-Mart -Raleigh SE (Sunnybrook)

~. ena AS Ja~u. YC.
Pre vs. Post Runoff Maiysis
Time of Concentration
Project Information
Project Name: Wat-Mart #4447-00, Raleigh, NC (Raleigh SE)
KHA Project #: 015476046
Designed by: JMH Dale: 3/13/2007
Revised by: Dale:
Revised by: ___ _ Date:
Manning's Two-year, L:ross ~ectlonal Weltetl Average
W alershed Sub Area Flow Length, L Roughness 24-hr rainfall, Paved or Area of Flow, a Perimeter, pw Hydraulic Velocity, V Travel Time, TI
Name Location Type of Flow Cover Description' (ftj Slope, s (fUft) Coefficient, n Pt (in) Unpaved (fl') (fl) radius, r (it) (fVs)" (min)"'
PRE-DEVELOPMENT
Brush-weed-grass mbdura
DA-tA Ouffalll Sheet Good 100 0.020 0.15 3.60
--._
----
.___
-_-
9.24
Shallow Brush-weed-grass mudure
Concentrated Good 1125 0.037 U 3.1 6.05
Channelaed 36' Storm Pipe 71 0.019 0.013 7.07 9.425 0.750 13.04 0.09
Shallow Brush-weed-grass mbaure
Concentrated Good 455 0.029 U 2.9 2.61
Bmsh-weed-grass mudure
Channelaed Good 160 0.019 0.08 18.0 26.54 0.603 1.82 1.47
Ti me of Concentration, T, (min) = 19.46
Brush-weed-grass mbaure
DA-1 B Outfall t Sheet Good 100 0.014 0.15 3.60
----
__
----
10.65
Shallow Brush-weedyress mixture
Concentrated Good 710 0.056 U 3.9 3.03
Bmsh-weed-grass mudure
Channelaed Good 850 O.O1B 0.08 ---- - B.0 13.27 0.603 1.71 6.31
Time of Concentr ation, T, (min) = 21.99
Brush-weed-grass manure
DA-2 Ouffall2 Sheet Good 100 0.020 0.15 3.60
---
---
----
9.24
Shallow Brush-weed-grass mudure

Concentrated
Good
560
0.045 - U _ _--- ___- 3.6 2.69
Channelaed 16' Storm Plpe 146 0.005 0.013 1.76 4.71 0.374 4.20 0.58
brush-weed-grass mMUre
Channelaed Good 340 0.019 O.OB --- ---- 6.4 21.75 0.294 1.13 5.03
Channelaed 24"Storm Drain 90 0.030 0.013 3.14 6.2832 0.500 12.55 0.12
T ime of Concentration, T, (min) = 17.65
DA-3 Ouffall3 5.00
T lmo of f:nnrwnlratlnn_ T_ Imint = 5.00
Brush-weedyrass mhnure
DA-4 Oulfall4 Sheet Good 100 0.035 0.15 3.60
----
---
-°-
--
7.38
Shallow Brush-weed-grass mixture
Concentrated Good 1180 0.036 U 3.1 6.34
Channelaed 36' Storm Pipe 94 0.040 0.013 7.07 9.425 0.750 20.77 0.08
' Cover Descr'plbns par TR-55 Manual
" From TR-55 Manual, Figure 3-1 for Shallow Concentrated Flow and Manning's Equation for Channelaed Flow
"' From TR-55 Manual, T, for Sheet flow = 0.007(nLjo.e 1(Pt)o.ss .~
T, far Shallow Concentrated and Channelaed Flow= L I3600V
P:\015476 Wal-Mart SlleCivll\046 Raleigh SE (Sunnybrook)1Calcs\Slorm\Runoffnew.xls 1 of 2

~~~
C~I~ ,~r~,l~,lm.
Pre vs. Post Runoff Malysis
Time of Concentration
Project Information
Project Name: Wal-Mart ft4447-00, Raleigh, NC (Raleigh SE)
KHA Project p: 015476046
Designed by: JMH Date: 3 /1 312 0 0 7
Revised by: Date:
Revised by: Date:

Watershed
Name
Sub Area
Location

Type of Flow

Cover Description'
Flow Length, L
(ft)

Slope, s (fVfl) Manning's
Roughness
CoefflclenL n Two-year,
24-hr rainfall,
Pz (In)
Paved or
Unpaved cross aecuonal
Area of Flow, a
(flz) wetted
Perimeter, pw
(fl)
Hydraulic
radius, r (fl) Average
Velocity, V
(fVs)"
Travel Time, Tr
(minj"'
POST-DEVELOPMENT
DA-1A Oudall t 5.00
Time of Concentration, T, (min) = 5.00

DA-iB
Oudalll
Sheet Brush-weed-grass mi~dure
Good
100
0.020
0.15
3.60
9.24
Shallow
Concentrated Brush-weed-grass mtdure
Good
1125
0.037
U
3.1
6.05
Channelized 36' Storm Pipe 550 0.019 0.013 7.07 9.425 0.750 13.04 0.70
Shallow
Concentrated Brush-weed-grass mixture
Good
150
0.067
U

----

--

----

4.1

0.61

Channelized Brush-weed-grass mbaure
Good
600
0.030
0.06
16.0
26.54
0.603
2.29
4.36
Ti me of Concentr ation, T, (min) = 16.60

DA-2
Outfall2
Sheet Brush-weedyrass musure
Good
100
0.020
0.15
3.60
----
----

---_

-_-

----

9.24
Shallow
Concentrated Brush-weed-grass mudure
Good
580
0.045
U
3.2
3.02
Channelized 18' Storm Pipe 146 0.005 0.013 1 76 4 71 0.374 4.20 0.56

Channeled Brush-weed-grass mudure
Good
340
0.019
0.06
6.4
21.75
0.294
1.13
5.03
Channelized 24' Stonn Drain 90 0.030 0.013 3.14 6.2632 0.500 12.55 0.12
T ime of Concentration, T,(min) = 17.99
DA-3 Outfall3
T 5.00
lmw of Concentration. T_lminl m 5.00
Brush-weed-grass mudure
DA-4 Outfall4 Sheet Good 100 0.035 0.15 3.60 -•-- - - •--- --- 7.38
Shallow Brush-weed-grass mndure
Concentrated Good 1180 0.036 U 3.1 6.34
Channelized 36" Slonn Pipe 94 0.048 0.013 7.07 9.425 0.750 20.77 0.08
Cover Descriptbns per TR-55 Manual
"From TR-55 Manual, Figure 3-1 (or Shallow Concentrated Flow and Menning's Egualbn for Channelized flow
"' from TR-55 Manual, T, (or Sheet Bow = 0.007(nL)o.e/ (Pr)o.sso.
T, for Shallow Concentrated and Channeled Flow= L 13600V
P:\015476 Wal-Marl SIIeCivll\046 Raleigh SE (Sunnybrook)\Calcs\Slorm\Runotfnew.xls 2 of 2

PRE VS. POST CURVE
NUMBER CALCULATIONS
1
STORMWATER MANAGEMENT CALCULATIONS
Wal-Mart -Raleigh SE (Sunnybrook)

Pre vs. Post Runoff Analysis
Composite Curve Number (CN)
ProJacl InlormaUon
ProJed Name: Wal-Mart #4447-00, Ralelgh, NC (Ralelgh SE)
KHA ProJeU p: 015476048 45.89
Oeslgned Dy: JMH Dale: 3/13/2007
Revised by. Dale:
Revised Dy: Dale:
mpoa e
Drainage Aree Drainage Watershed Hydrologic Shc ProduG o/ Curve Number
Name Location Area (ac) Cover/Boll Name (Type) Cover Descrlplbn' Group Curve N (CN)" ArN (ec) CN x area (CN)
PRE-DEVELOP MENT
BrusRweed-grass mixture
DA-tA Outfall-1 33.52 CoBex (CM), Manlechk lMeA) Far C. 70 8.17 153
Woods-Grass Combnelion
Cdfu (CM), Manlaahie (MeA) Far C 78 O.BB 67
Louisburg ILOC.Lo0). Apptlng lAPO.
PpB2, ApC, ApC2, ApD), Durham BrusRweed-grass miMUre
(DuB, DUC) Fes B 58 2.91 183
Lauebur9lLaC,LOD), Applsg (APO,
Ap82, ApC, ApC2, ApD). Durhan Wanda-Grass CoiMiixlion
(DUB, DUC) Far B 65 21.10 1312 ---

- Orr+i~. 0.».1M.e
- 99 2.18 212
...-
73.52 2288 -.87.8
BruaRweetl-grass mul.xa
DA-1B Oullall-1 12.37 CaBex (CM.Manlachie MeA) Fair C 70 1A8 102 -
_-
W nets-Gress CorMnetion
Coaax(CM),ManDlchielMeA) Fair C 78 0.8 B1 -
Lariaburg (LOC,LoDI. ADde191APe.
Ap82, ApC, ApC2, ApD). Durham BrueRw9ed-grass mixture
(DuB, DuC) Far B 56 925 238
-_
Louisburg (LoC,LOD), AppYrg (Ap0,
Ap82. ApC, ApC2, APD), Dothan Woods-Gress Cmbnaion
IDuB, DUC) fair B BS 5.88 381
-_-
l i ~ 12.37 782 812
rusRweatl-grass raxlure
DA-2 Oulfall-2 17.18 CoSax (CM), Manlachie (MeA) Far C 70 0.88 82 -
W ood9-Gress Carrlbslaian
Cd1u (DM), Manlaohi9 (MBA) Far C 78 0.6{ 99
Louisburg (LOC,LaD). Appling (APB,
Ap82, ApC, ApC2. ApD). Duham BrusRwea>greas mixture
(DuB, DuC) Fair B SB 0.99 27
----
Louisburg (LOC.LOD), APPlh9IMB.
ApB2, ADC, ApC2, ApD), Durham Woods-Grave Cambinelkn
(DuB, DuC Fair B 85 11.18 798
- o,adway
nn•ir
- 98 3.99 391

---_
17.48 1275 ' 72.8
:Lauisbu,g (L[M...L[A). Py1>Vna =~.
I twez, noc, AnC~. AoDI. ou<-. _ ~,~ n „ a mi.iu<e
~
~
DA-3 Oulfall~3 Far
2.d1 I (DUB, DuC) B 58 1.83 102
----
- - _ - - Orlsiie Roedwa 9B 0.81 60
2.d4 182 88.5
erusn-weeu-grass minute
DA-4 Oullall-4 21.31 Cdfex (CM), Menlechia (MeA) Far C 70 1.83 114 --
W Dods-Greta CariNnaion
Coaax (CMI~ Manta:hie (MaA) Far C 78 1.13 B8
Laasburg (LOC,LOD). A9Peng (ADB,
APB2, APC, ApC2, ApD). Durham BmaRweed-grass mlxWre
(DUB, DuC) Far B 58 10.46 588 -
-- -
Louiabur9 (LOC,LODI. ADPan9 (ApB,
ApB2, ADC. ApC2, ApDI. Durham W aotla-Grass CarMYlaian
(W B, DUC) Far B 85 2.97 193 -
OBaae noadwa
.. 99 5.12 502
- 21.31 1481 89.5
'Cover Descrlpllona Der TR-55 Manual
"From 7R-55 Manual, Table 2-2 a 8 c
Pi015478 Wal-Mad SlteClvil\046 Ralelgh SE (Sunnybrook)1Calcs\Storm\RUnoffnew.zls 1 0l2

c~-~ ~k
Pre vs. Post Runoff Malysls
Composite Curve Number (CN)
Project Information
ProJecl Name: Wal-Mart 84447-00, Raleigh, NC (Raleigh SE)
KHA Protect #: 015476046 45.89
Designed by. JMH Dale: 3/73/2007
Revisetl by: Dale:
Revised by: Date:
mpos e
Drainage Area Drainage Walerahe0 Hydrobylc Shc Produd d Curve Number
Name Locallon Aree (ec) Cover/Shc Nama (Type) Cover Oescriplbn' Group Curve 9 (CN)" Area (ac) CN n area (CN)
PORT DEVELO PMENT
Lewna
DA-1A Wei Pond 25.97 M Open Spate Far 8 81 4.IB 292.19
Imparviara Perk' , 8r' a. Sidewalk B BB 21.18 2078
25.87 2368 81.2
rusRweed-grass mi~.lue
DA-1B Oul(all-1 25.17 Cdlas DnA), Manlathia (MBA) Fair C 70 3.id 220
Woods-Grass Cm1b'valbn
CaNan (DM), Mentechie (MeA) Far C 76 0.81 49
Lauiaburg (LOC,LaD), Appang (ApB,
ApB2, ApC, ApC2, ApD), Duharn BrusRwwd-grass mixtue
(DuB, DuC) Fair B 58 7.75 d3/
---
LauiaWrg (LOC,LoD), Appsng (ApB,
Ap02, ApC, ApC2, ApDI. Durllem Woods-Grass Cmibinelion
(DUB, DUC) Far B 85 11.48 7d8

-- ONade Roedw
- 98 2.18 212
25.17 1880 88.0
ms -weed-grass mialue
DA-2 Oulfell-2 12.11 Cdlan (CML Manlechle (MeA Fair C 70 0.80 45
Wtada-Grasf Cambinelion
CaNas (CMj, ManUt.hie (MeA) Far C 78 O.BB 87
Larisburg (LOC,LoDI. AppFng lApB,
ApB2, ApC, ApC2, ApDI. Ouham BN6Rwead-firma mbeuB
(DUB, DuCJ Fek B 85 8.60 429
---
011site RoaTnay 48 7.99 791
12.11 932 78.9
Lauisbug (L ,LaD), Appfing (ApO,
ApB2, ApC, ApC2, ApD), Durham BmaRweed-grew mielus
DA-3 Oulfell-3 2.44 (DuB, DuC) Far B 58 1.83 102

.- Ollslle Raedwe
.. 9B 0.81 60
.-.-
2.44 182 88.5
man-weed-grass m.1ue
DA-4 OuMall-4 21A3 Ccllen (DM), Manlachie (MeA) Far C 70 1.52 106
Woods-Grass Canblrlalitn
Cohan (CnA), Mantachie MeA) Far C 78 1.13 88
-_
Lauisbug (LOC.LaD). Appfing (ApB,
Ap82, ApC, ApC2, ApD), Durham BmsRweed-grass mlalure
(DuB, DuC) Far B 58 10.23 573
---
Lodsbur9 (LOC,LOD), Applirg (ApB,
ApB2, APC, ApC2, ApD), Durham W soda-Grass Cmlbinabn
(DUB, DUC) Far 8 65 297 193
OnsNe Roatlwa 98 5.58 517
21.43 1505 70.2
' Cover Descriptions per TR-55 Manual
"From TR-55 Manual, Table 2-2 e 8 c
P:\015476 Wal-Man SileClvll\046 Raleigh SE (Sunnybrook)\Calcs\Slonn\RunoHnav.da 2 of 2

1
STORMWATER SCHEMATIC DIAGRAM
STORMWATER MANAGEMENT CALCULATIONS
' Wal-Mart - Raleigh SE (Sunnybrook)

-DEVELOPMENT STOHMWA'1'EK SCHEMA'1'll:
Nodes
A Stage/Area
V Stage/Volume
T Time/Stage
M Manhole
Basins
0 Overland Flow
U SCS Unit Hydro
S Santa Barbara
Links
P Pipe
W Weir
C Channel
D Drop Structure
B Bridge
R Rating Curve
H Breach
A : OUTFACE -1 _._.
~ W: SPILLWAY -
U: DA-lA
T:OUTFA~~
T:OUTFALL-2 U: DA-1B
U: DA-2
T:OUTFALL-3
U: DA-3
T:OUTFALL-4
U: DA-4
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.

POST-DEVELOPMENT
Nodes
A Stage/Area
V Stage/Volume
T Time/Stage
M Manhole
Basins
O Overland Flow
U SCS Unit Hydro
S Santa Barbara
Links
P Pipe
W Weir
C Channel
D Drop Structure
B Bridge
R Rating Curve
H Breach
7l: h G MAT 1 l: ll l A(i itAM
D:CS-WET POND
W:SPILLWAY
T:OUTFALL-2
U: DA-2
T:OUTFALL-3
U: DA-3
T:OUTFALL-4
U:DA-4
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.

PRE-DEVELOPMENT ROUTING INPUT
STORMWATER MANAGEMENT CALCULATIONS
Wal-Mart -Raleigh SE (Sunnybrook)

PRE-DEVELOPMENT INPUT: BASINS
Name: DA-lA Node: OUTFACE-1 Status: Onsite
Group: BASE Type: SCS Unit Hydrograph
Unit Hydrograph: Uh464 Peaking Factor: 484.0
Rainfall File: Scsii-24 Storm Duration(hrs): 999.00
Rainfall Amount(in): 999.000 Time of Conc(min): 19.46
Area(ac): 33.520 Time Shift(hrs): 0.00
Curve Number: 67.60 Max Allowable Q(cfs): 999999.000
DCIA($): 0.00
Name: DA-1B Node: OUTFACE Status: Onsite
Group: BASE Type: SCS Unit Hydrograph
Unit Hydrograph: Uh484 Peaking Factor: 484.0
Rainfall File: Scsii-24 Storm Duration(hrs): 999.00
Rainfall Amount(in): 999.000 Time of Conc(min): 21.99
Area(ac): 12.370 Time Shift(hrs): 0.00
Curve Number: 63.20 Max Allowable Q(cfs): 999999.060
DCIA(~): 0.00
------------------------
Name: DA-2 ------------- -----------------------------
Node: OUTFACE-2 ----------------------------------
Status: Onsite
t Group: BASE Type: SCS Unit Hydrograph
Unit Hydrograph: Uh484 Peaking Factor: 484.0
Rainfall File: Scsii-24 Storm Duration(hrs): 999.00
Rainfall Amount(in): 999.000 Time of Conc(min): 17.65
Area(ac): 17.480 Time Shift(hrs): 0.00
Curve Number: 72.90 Max Allowable Q(cfs): 999999.000
DCIA($): 0.00
Name: DA-3 Node: OUTFACE-3 Status: Onsite
Group: BASE Type: SCS Unit Hydrograph
Unit Hydrograph: Uh484 Peaking Factor: 464.0
Rainfall File: Scsii-24 Storm Duration(hrs): 999.00
Rainfall Amount(in): 999.000 Time of Conc(min): 5.00
Area(ac): 2.300 Time Shift(hrs): 0.00
Curve Number: 61.30 Max Allowable Q(cfs): 999999.000

1 DCIA(~): 0.00
------------------------
Name: DA-4 ------------- ----------------------------
Node: OUTFACE-4 -----------------------------------
Status: Onsite
Group: BASE Type: SCS Unit Hydrograph
' Unit Hydrograph: Uh464 Peaking Factor: 484.0
Rainfall File: Scsii-24 Storm Duration(hrs): 999.00
Rainfall Amount(in): 999.000 Time of Conc(min): 13.80
Area(ac): 21.310 Time Shift(hrs): 0.00
Curve Number: 69.50 Max Allowable Q(cfs): 999999.000
DCIA(~): 0.00
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc. Page 1 of 1

1
1
1
1
PRE-DEVELOPMENT INPUT: NODES
Name: OUTFACE Base Flow(cfs): 0.000 Znit Stage(ft): 227.000
Group: BASE Warn Stage(ft): 0.000
Type: Time/Stage
- ----Time(hrs) -- Stage(ft)
0.00 227.000
999.00 227.000
Name: OUTFACE-1 Base Flow(cfs): 0.000 Init Stage(ft): 227.000
Group: BASE Warn Stage(ft): 0.000
Type: Stage/Area
Stage(ft) Area(ac)
--------------- -------'-------
227.000 0.0011
228.000 0.0178
229.000 0.1031
230.000 0.2482
231.000 0.4201
232.000 0.5576
240.000 0.5576
Name: OUTFACE-2 Base Flow(cfs): 0.000 Init Stage(ft): 248.000
Group: BASE Warn Stage(ft): 0.000
Type: Time/Stage
Time(hrs) Stage(ft)
--------------- ---------------
0.00 248.000
999.00 248.000
Name: OUTFACE-3 Base Flow(cfs): 0.000 Init Stage(ft): 234.000
Group: BASE Warn Stage(ft): 0.000
Type: Time/Stage
Time(hrs) Stage(ft)
--------------- ---------- ----
0.00 234.000
999.00 234.000
Name: OUTFACE-9 Base Flow(cfs): 0.000 Init Stage(ft): 248.000
Group: BASE Warn Stage(ft): 0.000
Type: Time/Stage
-----Time(hrs) ------Stage(ft)
0 00 248.000
999.00 248.000
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.
Page 1 of 1

1
1

PRE-DEVELOPMENT INPUT: SPILLWAYS
Name: SPILLWAY From Node: OUTFACE-1
Group: BASE To Node: OUTFACE
Flow: Both Count: 1
Type: Vertical: Mavis Geometry: Trapezoidal
Bottom Width(ft): 4.00
Left Side Slope(h/v): 0.61
Right Side Slope(h/v): 0.61
Invert(ft): 227.000
Control Elevation(ft): 227.000
Struct Opening Dim(ft): 9999.00
TABLE
Bottom Clip(ft): 0.000
Top Clip(ft): 0.000
Weir Discharge Coef: 3.200
Orifice Discharge Coef: 0.600
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.
Page 1 of 1

PRE-DEVELOPMENT HYDROLOGY
STORMWATER MANAGEMENT CALCULATIONS
Wal-Mart -Raleigh SE (Sunnybrook)

PRE-DEVELOPMENT HYDROLOGY: INDIVIDUAL BASIN SUMMARY - 2 YR STORM EVENT
Basin Name: DA-2
Group Name: BASE
Simulation: 002Y024H
Node Name: OUTFACE-2
Basin Type: SCS Unit Hydrograph
Unit Hydrograph: Uh484
Peaking Fator: 484.0
Spec Time Inc (min): 2.35
Comp Time Inc (min): 2.35
Rainfall File: Scsii-24
Rainfall Amount (in): 3.700
Storm Duration (hrs): 24.00
Status: Onsite
Time of Conc (min): 17.65
Time Shift (hrs): 0.00
Area (ac): 17.480
Vol of Unit Hyd (in): 1.000
Curve Number: 72.900
DCIA (8): 0.000
Time Max (hrs): 12.08
Flow Max (cfs): 25.178
Runoff Volume (in):~ 3~~
Runoff Volume (ft3): 82946.162
Basin Name: DA-3
Group Name: BASE
Simulation: 002Y024H
Node Name: OUTFACE-3
Basin Type: SCS Unit Hydrograph
Unit Hydrograph: Uh464
Peaking Fator: 484.0
Spec Time Inc (min): 0.67
Comp Time Inc (min): 0.67
Rainfall File: Scsii-24
Rainfall Amount (in): 3.700
Storm Duration (hrs): 24.00
Status: Onsite
Time of Conc (min): 5.00
Time Shift (hrs): 0.00
Area (ac): 2.300
Vol of Unit Hyd (in): 1.000
Curve Number: 61.300
DCIA (~): 0.000
Time Max (hrs): 12.01
Flow Max (cfs): 276
Runoff Volume (in): 0.678
Runoff Volume (ft3): 5660.482
Basin Name: DA-4
Group Name: BASE
Simulation: 002Y024H
Node Name: OUTFACE-4
Basin Type: SCS Unit Hydrograph
Unit Hydrograph: Uh484
Peaking Fator: 484.0
Spec Time Inc (min): 1.84
Comp Time Inc (min): 1.84
Rainfall File: Scsii-24
Rainfall Amount (in): 3.700
Storm Duration (hrs): 24.00
Status: Onsite
Time of Conc (min): 13.80
Time Shift (hrs): 0.00
Area (ac): 21.310
Vol of Unit Hyd (in): 1.000
Curve Number: 69.500
DCIA (~): 0.000
Time Max (hrs): 12.05
Flow Max (cfs): 2. 8"109
Runoff Volume (in): 1.103
Runoff Volume (ft3): 85307.989
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc. Page 1 of 1

30
PRE-DEVELOPMENT HYDROLOGY: INDIVIDUAL BASIN SUMMARY - 2 YR STORM EVENT
Simulation 002Y024H
DA-4
25
20
15
U
O
LL
10
5
D~1-13
o~
0
DA-2
DA-3
DA-4
5 10 15 20 25 30
Tim e(hrs)
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.

PRE-DEVELOPMENT HYDROLOGY: INDIVIDUAL BASIN SUMMARY - 15 YR STORM EVENT
Basin Name: DA-2
Group Name: BASE
Simulation: 015Y024H
Node Name: OUTFACE-2
Basin Type: SCS Unit Hydrograph
Unit Hydrograph: Uh484
Peaking Fator: 484.0
Spec Time Inc (min): 2.35
Comp Time Inc (min): 2.35
Rainfall File: Scsii-24
Rainfall Amount (in): 6.040
Storm Duration (hrs): 24.00
Status: Onsite
Time of Conc (min): 17.65
Time Shift (hrs): 0.00
Area (ac): 17.480
Vol of Unit Hyd (in): 1.000
Curve Number: 72.900
DCIA ($): 0.000
Time Max (hrs): 12.08
Flow Max (cfs): 61.93,4
Runoff Volume (in): 3.107
Runoff Volume (ft3): 197118.704
Basin Name: DA-3
Group Name: BASE
Simulation: O15Y024H
Node Name: OUTFACE-3
Basin Type: SCS Unit Hydrograph
Unit Hydrograph: Uh484
Peaking Fator: 484.0
Spec Time Inc (min): 0.67
Comp Time Inc (min): 0.67
Rainfall File: Scsii-24
Rainfall Amount (in): 6.040
Storm Duration (hrs): 24.00
Status: Onsite
Time of Conc (min): 5.00
Time Shift (hrs): 0.00
Area (ac): 2.300
Vol of Unit Hyd (in): 1.000
Curve Number: 61.300
DCIA ($): 0.000
Time Max (hrs): 12.01
Flow Max (cfs): 7.436
Runoff Volume (in): 2.05'
Runoff Volume (ft3): 17158.301
Basin Name: DA-4
Group Name: BASE
Simulation: O15Y024H
Node Name: OUTFACE-4
Basin Type: SCS Unit Hydrograph
Unit Hydrograph: Uh464
Peaking Fator: 464.0
Spec Time Inc (min): 1.84
Comp Time Inc (min): 1.84
Rainfall File: Scsii-24
Rainfall Amount (in): 6.090
Storm Duration (hrs): 24.00
Status: Onsite
Time of Conc (min): 13.80
Time Shift (hrs): 0.00
Area (ac): 21.310
Vol of Unit Hyd (in): 1.000
Curve Number: 69.500
DCIA ($): 0.000
Time Max (hrs): 12.05
Flow Max (cfs): 73.863
Runoff Volume (in): 2^ 7TH
Runoff Volume (ft3): 215496.928
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.
Page 1 of 1

PRE-DEVELOPMENT HYDROLOGY: INDIVIDUAL BASIN SUMMARY - 15 YR STORM EVENT
ao
Simulation 015Y024H
DA- `t
60
40
3
0
20
pA ~
DA-2
DA-3
DA-4
~/~'
0~
0
5 10 15 20 25 30
Tim e(hrs)
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.

PRE-DEVELOPMENT ROUTING RESULTS: 2 YR 24 HR STORM EVENT
Max Time Max Warning Max Delta Max Surf Max Time Max Max Time Max
Name Group Simulation Stage Stage Stage Stage Area Inflow Inflow Outflow Outflow
hrs ft ft ft ft2 hrs cfs hrs cfs
OUTFACE BASE 2yr 24 hr 0.00 227.000 0.000 0.0000 0 12.17 39.295 0.00 0.000
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc. Page 1 of 1

PRE-DEVELOPMENT ROUTING RESULTS: 2 YR 24 HR STORM EVENT
35
Simulation 2yr 24 hr
30
25
~ 20
r...
U
3
0
O
15
0
c
10
5
0~
0
5 10 15 20 25 30 35
Time (hrs)
OUTFACE Inflow
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.

PRE-DEVELOPMENT ROUTING RESULTS: 15 YR 24 HR STORM EVENT
Max Time Max Warning Max Delta Max Surf Max Time Max Max Time Max
Name Group Simulation Stage Stage Stage Stage Area Inflow Inflow Outflow Outflow
hrs ft ft ft ft2 hrs cfs hrs cfs
OUTFACE BASE 15yr 24 hr 0.00 227.000 0.000 0.0000 0 12.16 112.087 0.00 0.000
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc. Page 1 of 1

POST DEVELOPMENT ROUTING INPUT
1
STORMWATER MANAGEMENT CALCULATIONS
Wal-Mart -Raleigh SE (Sunnybrook)

' POST-DEVELOPMENT ROUTING INPUT: ALL
___= Basins ------------------------------------------------------------------------------
------------------------------------------------------------------------------
' Name: DA-lA Node: WET POND Status: Onsite
Group: BASE Type: SCS Unit Hydrograph
Unit Hydrograph: Uh484 Peaking Factor: 484.0
Rainfall File: Scsii-24 Storm Duration(hrs): 999.00
Rainfall Amount(in): 999.000 Time of Conc(min): 5.00
Area(ac): 25.970 Time Shift(hrs): 0.00
Curve Number: 91.20 Max Allowable Q(cfs): 999999.000
DCIA($): 0.00

Name: DA-1B Node: OUTFACE-1 Status: Onsite
Group: BASE Type: SCS Unit Hydrograph
Unit Hydrograph: Uh484 Peaking Factor: 484.0
' Rainfall File: Scsii-24 Storm Duration(hrs): 999.00
Rainfall Amount(in): 999.000 Time of Conc(min): 16.60
Area(ac): 25.170 Time Shift(hrs): 0.00
Curve Number: 66.00 Max Allowable Q(cfs): 999999.000
' DCIA($): 0.00
------------------------
Name: DA-2 ------------ ------------------------------
Node: OUTFACE-2 ----------
Status: ------------------------
Onsite
' Group: BASE Type: SCS Unit Hydrograph
Unit Hydrograph: Uh484 Peaking Factor: 484.0
Rainfall File: Scsii-24 Storm Duration(hrs): 999.00
Rainfall Amount(in): 999.000 Time of Conc(min): 17.99
Area(ac): 12.110 Time Shift(hrs): 0.00
Curve Number: 76.90 Max Allowable Q(cfs): 999999.000
DCIA($): 0.00
Name: DA-3 Node: OUTFACE-3 Status: Onsite
Group: BASE Type: SCS Unit Hydrograph
Unit Hydrograph: Uh484 Peaking Factor: 484.0
Rainfall File: Scsii-24 Storm Duration(hrs): 999.00
1 Rainfall Amount(in): 999.000 Time of Conc(min): 5.00
Area(ac): 2.300 Time Shift(hrs): 0.00
Curve Number: 64.20 Max Allowable Q(cfs): 999999.000
DCIA($): 0.00

Name: DA-4 Node: OUTFACE-4 Status: Onsite
Group: BASE Type: SCS Unit Hydrograph
' Unit Hydrograph: Uh484 Peaking Factor: 484.0
Rainfall File: Scsii-24 Storm Duration(hrs): 999.00
Rainfall Amount(in): 999.000 Time of Conc(min): 13.60
Area(ac): 21.430 Time Shift(hrs): 0.00
Curve Number: 70.20 Max Allowable Q(cfs): 999999.000
DCIA($): 0.00
-------------------------
___= Nodes -------------- -----------
----------- ------------------------------
------------------------------ ----------
---------- --------------
--------------
Name: OUTFACE-1
Group: BASE
Type: Time/Stage
Time(hrs) Stage(ft)
--------------- ---------------
0.00 215.000
999.00 215.000
Base Flow(cfs): 0.000 Init Stage(ft): 215.000
Warn Stage(ft): 999.000
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc. Page 1 of 6

' POST-DEVELOPMENT ROUTING INPUT: ALL
' Name: OUTFACE-2 Base Flow(cfs): 0.000 Init Stage(ft): 248.000
Group: BASE Warn Stage(ft): 999.000
Type: Time/Stage
' Time(hrs)
---- Stage(ft)
---------
--------------- --
0.00 248.000
999.00 248.000
--- -
- ---
Name: OUTFACE-3 --
-- ----
Base -----------
Flow(cfs): -----------
0.000 ----------
Init ---g------
Sta elft): ---------
234.000
Group: BASE Warn Stage(ft): 999.000
Type: Time/Stage
' Time(hrs)
-- Stage(ft)
---------
--------------- ----
0.00 234.000
' 999.00 234.000
- -----
----- - -
Name: OUTFACE-4 --
- ----
Base -----------
Flow(cfs): -----------
0.000 ---------
Init -----------
Stage(ft): ------------
246.000
Group: BASE Warn Stage(ft): 999.000
' Type: Time/Stage
Time(hrs)
----- Stage(ft)
---------
--------------- -
0.00 248.000
999.00 248.000
----------------------
Name: WET POND ---------- ----
Base -----------
Flow(cfs): -----------
0.000 ---------
Init -----------
Stage(ft): ------------
222.903
Group: BASE Warn Stage(ft): 245.000
' Type: Stage/Area
Stage(ft) ---- Area(ac)
' -----
222.000 0.9272
223.000 0.9399
224.000 0.9519
225.000 0.9633
226.000 0.9742
227.000 0.9843
228.000 0.9939
229.000 1.0029
230.000 1.0112
1.0191
' 231.000
-----------
------
------------------- -----
___= Cross Sections ____________________________________

____________________

______________
Name: Group: BASE
'
Encroachment: No
' Station(ft) Elevation(ft) Manning's N
--------------- --------------- ---------------
------------------------------------------------
___= Drop Structures -----------------------------------
-----------------------------------
--------------------
--------------------
--------------
--------------
Name: CS-WET POND From Node: WET POND Length(ft): 140.00
Group: BASE To Node: OUTFACE-1 Count: 1
UPSTREAM DOWNSTREAM Friction Equation: Average Conveyance
Geometry: Circular Circular Solution Algorithm: Automatic
'
Span(in): 30.00 30.00 Flow: Both
Rise(in): 30.00 30.00 Entrance Loss Coef: 0.500
Invert(ft): 219.000 216.000 Exit Loss Coef: 0.500
Manning's N: 0.013000 0.013000 Outlet Ctrl Spec: Use do or tw
Top Clip(in): 0.000 0.000 Inlet Ctrl Spec: Use do
Bot Clip(in): 0.000 0.000 Solution Incs: 10
Upstream FHWA Inlet Edge Description:
Circular Concrete: Square edge w/ headwall

Interconnected Channel and Pond Routing Model (ICPR)
t ©2002 Streamline Technologies, Inc.
Page 2 of 6

' POST-DEVELOPMENT ROUTING INPUT: ALL

1

1

Downstream FHWA Inlet Edge Description:
Circular Concrete: Square edge w/ headwall
*** Weir 1 of 4 for Drop Structure CS-WET POND ***
TABLE
Count: 1 Bottom Clip(in): 0.000
Type: Vertical: Mavis Top Clip(in): 0.000
Flow: Both Weir Disc Coef: 3.200
Geometry: Rectangular Orifice Disc Coef: 0.600
Span(in): 5.50 Invert(ft): 222.000
Rise(in): 2.50 Control Elev(ft): 222.000
*** Weir 2 of 4 for Drop Structure CS-WET POND ***
TABLE
Count: 2 Bottom Clip(in): 0.000
Type: Vertical: Mavis Top Clip(in): 0.000
Flow: Both Weir Disc Coef: 3.200
Geometry: Rectangular Orifice Disc Coef: 0.600
Span(in): 20.00 Invert(ft): 224.000
Rise(in): 8.00 Control Elev(ft): 224.000
*** Weir 3 of 4 for Drop Structure CS-WET POND ***
TABLE
Count: 2 Bottom Clip(in): 0.000
Type: Vertical: Mavis Top Clip(in): 0.000
Flow: Both Weir Disc Coef: 3.200
Geometry: Rectangular Orifice Disc Coef: 0.600
Span(in): 24.00 Invert(ft): 226.500
Rise(in): 10.00 Control Elev(ft): 226.500
*** Weir 4 of 4 for Drop Structure CS-WET POND ***
TABLE
Count: 1 Bottom Clip(in): 0.000
Type: Horizontal Top Clip(in): 0.000
Flow: Both Weir Disc Coef: 3.200
Geometry: Rectangular Orifice Disc Coef: 0.600
Span(in): 48.00 Invert(ft): 228.500
Rise(in): 48.00 Control Elev(ft): 228.500
------------
=====Weirs___
___________ _
_________________ _ _
_____
___________________ _ _
____________ _
_____________
Name: SPILLWAY From Node: WET POND
Group: BASE To Node: OUTFACE-1
Flow: Both Count: 1
Type: Vertical: Mavis Geometry: Trapezoidal
Bottom Width(ft): 100.00
Left Side Slope(h/v): 2.50
Right Side Slope(h/v): 2.50
Invert(ft): 228.500
Control Elevation(ft): 228.500
Struct Opening Dim(ft): 9999.00
TABLE
Bottom Clip(ft): 0.000
Top Clip(ft): 0.000
Weir Discharge Coef: 3.200
Orifice Discharge Coef: 0.600
=====Hydrology-Simulations________________________________________________________________
Name: O02YR 24 HR
Filename: P:\015476 Wal-Mart SiteCivil\046 Raleigh SE (Sunnybrook)\Calcs\Storm\ICPR\O02YR 24 HR.R32
Override Defaults: Yes
Storm Duration(hrs): 24.00
Rainfall File: Scsii-24
Rainfall Amount(in): 3.70
Time(hrs) Print Inc (min)
--------------- ---------------
30.000 5.00
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.
Page 3 of 6
1

POST-DEVELOPMENT ROUTING INPUT: ALL
Name: OlOYR 24 HR
Filename: P:\015476 Wal-Mart SiteCivil\046 Raleigh SE (Sunnybrook)\Calcs\Storm\ICPR\OlOYR 24 HR.R32
' Override Defaults: Yes
Storm Duration(hrs): 24.00
Rainfall File: Scsii-24
Rainfall Amount(in): 5.70
' Time(hrs) Print Inc(min)
------------ -- -
30.000 5.00
----------------------------------
Name: O15YR 24 HR ------------------------------------------------------------------
' Filename: P:\015476 Wal-Mart SiteCivil\046 Raleigh SE (Sunnybrook)\Calcs\Storm\ICPR\O15YR 24 HR.R32
Override Defaults: Yes
Storm Duration(hrs): 24.00
Rainfall File: Scsii-24
Rainfall Amount(in): 6.04
Time(hrs) Print Inc(min)
------
--------------- ---------
30.000 5.00
Name: OSOYR 24 HR
Filename: P:\015476 Wal-Mart SiteCivil\046 Raleigh SE (Sunnybrook)\Calcs\Storm\ICPR\OSOYR 24 HR.R32
Override Defaults: Yes
Storm Duration(hrs): 24.00
' Rainfall File: Scsii-24
Rainfall Amount(in): 7.30
Time(hrs) Print Inc(min)
------ ---------------
-
-----
---
30.000 5.00
----------------------------------
Name: 100YR 24 HR ------------------------------------------------------------------
Filename: P:\015476 Wal-Mart SiteCivil\046 Raleigh SE (Sunnybrook)\Calcs\Storm\ICPR\10O.R32
Override Defaults: Yes
Storm Duration(hrs): 24.00
Rainfall File: Scsii-24
Rainfall Amount(in): 8.20
t Time(hrs) Print Inc(min)
--
--------------- -------------
30.000 5.00
----------------------------------------------------------------------------------------------------
Name: DRAWDOWN
Filename: P:\015476 Wal-Mart SiteCivil\046 Raleigh SE (Sunnybrook)\Calcs\Storm\ICPR\DRAWDOWN.I32
Override Defaults: Yes
Storm Duration(hrs): 0.00
Rainfall File: Scsii-24
Rainfall Amount(in): 0.00
Time(hrs) Print Inc (min)
--------------- ---------------
30.000 5.00
------------------------------------------------------------------ -
___= Routing Simulations _________________________________________________________________
Name: 002Y024H Hydrology Sim: 002YR 24 HR
Filename: P:\015476 Wal-Mart SiteCivil\046 Raleigh SE (Sunnybrook)\Calcs\Storm\ICPR\O02Y024H.I32
Execute: Yes Restart: No Patch: No
Alternative: No
Max Delta Z(ft): 1.00 Delta Z Factor: 0.00500
Time Step Optimizer: 10.000
Start Time(hrs): D.O0O End Time(hrs): 30.00
Min Calc Time(sec): 0.5000 Max Calc Time(sec): 60.0000
Boundary Stages: Boundary Flows:
Time(hrs) Print Inc (min)
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc. Page 4 of 6

POST-DEVELOPMENT ROUTING INPUT: ALL
-------------- --------------
11.000 30.000
14.000 5.000
30.000 60.000
Group Run
--------------- ---
BASE Yes
-----------------------------------------------------------------------------------------------
Name: O10Y024H Hydrology Sim: OlOYR 24 HR
Filename: P:\015476 Wal-Mart SiteCivil\046 Raleigh SE (Sunnybrook)\Calcs\Storm\ICPR\O10Y024H.I32
Execute: No Restart: No Patch: No
Alternative: No
Max Delta Z(ft): 1.00 Delta Z Factor: 0.00500
Time Step Optimizer: 10.000
Start Time(hrs): 0.000 End Time(hrs): 30.00
Min Calc Time(sec): 0.5000 Max Calc Time(sec): 60.0000
Boundary Stages: Boundary Flows:
Time(hrs) Print Inc (min)
--------------- ---------------
11.000 30.000
14.000 5.000
30.000 60.000
Group Run
BASE Yes
----------------------------------------------------------------------------------------------------
Name: O15Y024H Hydrology Sim: O15YR 24 HR
Filename: P:\015476 Wal-Mart SiteCivil\046 Raleigh SE (Sunnybrook)\Calcs\Storm\ICPR\O15Y024H.I32
Execute: Yes Restart: No Patch: No
Alternative: No
' Max Delta Z(ft): 1.00 Delta Z Factor: 0.00500
Time Step Optimizer: 10.000
Start Time(hrs): 0.000 End Time(hrs): 30.00
Min Calc Time(sec): 0.5000 Max Calc Time(sec): 60.0000
Boundary Stages: Boundary Flows:
' Time(hrs) Print Inc(min)
--------------- ---------------
11.000 30.000
14.000 5.000
30.000 60.000
Group Run
--------------- -----
' BASE Yes
----------------------------------------------------------------------------------------------------
Name: OSOY024H Hydrology Sim: OSOYR 24 HR
Filename: P:\015476 Wal-Mart SiteCivil\046 Raleigh SE (Sunnybrook)\Calcs\Storm\ICPR\050Y024H.I32
Execute: No Restart: No Patch: No
Alternative: No
Max Delta Z(ft): 1.00 Delta Z Factor: 0.00500
Time Step Optimizer: 10.000
Start Time(hrs): 0.000 End Time(hrs): 30.00
Min Calc Time(sec): 0.5000 Max Calc Time sec): 60.0000
Boundary Stages: Boundary Flows:
Time(hrs) Print Inc(min)
11.000 30.000
14.000 5.000
30.000 30.000
Group Run
--------------- -----
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc. Page 5 of 6

POST-DEVELOPMENT ROUTING INPUT: ALL
BASE Yes
----------------------------------------------------------------------------------------------------
Name: 100Y029H Hydrology Sim: 100YR 24 HR
Filename: P:\015476 Wal-Mart SiteCivil\046 Raleigh SE (Sunnybrook)\Calcs\Storm\ICPR\100Y024H.I32
Execute: Yes Restart: No Patch: No
Alternative: No
Max Delta Z(ft): 1.00 Delta Z Factor: 0.00500
Time Step Optimizer: 10.000
Start Time(hrs): 0.000 End Time(hrs): 30.00
Min Calc Time(sec): 0.5000 Max Calc Time(sec): 60.0000
Boundary Stages: Boundary Flows:
Time(hrs) Print Inc (min)
--------------- ---------------
11.000 30.000
14.000 5.000
30.000 30.000
Group Run
BASE Yes
Name: DRAWDOWN Hydrology Sim: DRAWDOWN
Filename: P:\015476 Wal-Mart SiteCivil\046 Raleigh SE (Sunnybrook)\Calcs\Storm\ICPR\DRAWDOWN.I32
Execute: No Restart: No Patch: No
Alternative: No
Max Delta Z(ft): 1.00 Delta Z Factor: 0.00500
Time Step Optimizer: 10.000
Start Time(hrs): 0.000 End Time(hrs): 120.00
Min Calc Time (sec): 0.5000 Max Calc Time(sec): 120.0000
Boundary Stages: Boundary Flows:
Time(hrs) Print Inc (min)
------------
120.000 --- ---------------
60.000
Group
------------ Run
--- -----
BASE Yes
----------------------------------------------------------------------------------------
___= Boundary Conditions _________________________________________________________________
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc. Page 6 of 6

POST-DEVELOPMENT HYDROLOGY
STORMWATER MANAGEMENT CALCULATIONS
Wal-Mart -Raleigh SE (Sunnybrook)

POST-DEVELOPMENT HYDROLOGY: INDIVIDUAL BASIN SUMMARY - 2 YR STORM EVENT

Basin Name: DA-lA
Group Name: BASE
Simulation: 002YR 24 HR
Node Name: WET POND
Basin Type: SCS Unit Hydrograph
Unit Hydrograph: Uh484
Peaking Fator: 484.0
Spec Time Inc (min): 0.67
Comp Time Znc (min): 0.67
Rainfall File: Scsii-24
Rainfall Amount (in): 3.700
Storm Duration (hrs): 24.00
Status: Onsite
Time of Conc (min): 5.00
Time Shift (hrs): 0.00
Area (ac): 25.970
Vol of Unit Hyd (in): 1.001
Curve Number: 91.200
DCIA ($): 0.000
Time Max (hrs): 12.00
Flow Max (cfs): 99.200
Runoff Volume (in): 2.747
Runoff Volume (ft3): 258928.164
Basin Name: DA-1B
Group Name: BASE
Simulation: 002YR 24 HR
Node Name: OUTFACE-1
Basin Type: SCS Unit Hydrograph
Unit Hydrograph: Uh484
Peaking Fator: 484.0
Spec Time Inc (min): 2.21
Comp Time Inc (min): 2.21
Rainfall File: Scsii-24
Rainfall Amount (in): 3.700
Storm Duration (hrs): 24.00
Status: Onsite
Time of Conc (min): 16.60
Time Shift (hrs): 0.00
Area (ac): 25.170
Vol of Unit Hyd (in): 1.000
Curve Number: 66.000
DCIA ($): 0.000
Time Max (hrs): 12.10
Flow Max (cfs): 24.246
Runoff Volume (in): 0.910
Runoff Volume (ft3): 83113.663
Basin Name: DA-2
Group Name: BASE
' Simulation: 002YR 24 HR
Node Name: OUTFACE-2
Basin Type: SCS Unit Hydrograph
Unit Hydrograph: Uh484
' Peaking Fator: 484.0
Spec Time inc (min): 2.40
Comp Time Znc (min): 2.40
Rainfall File: Scsii-24
Rainfall Amount (in):
Storm Duration (hrs): 3.700
24.00
Status: Onsite
Time of Conc (min): 17.99
Time Shift (hrs): 0.00
Area (ac): 12.110
Vol of Unit Hyd (in): 1.000
Curve Number: 76.900
DCIA ($): 0.000
Time Max (hrs): 12.07
Flow Max (cfs): 20.951
Runoff Volume (in): 1.571
Runoff Volume (ft3): 69077.452
1
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.
Page 1 of 2

POST-DEVELOPMENT HYDROLOGY: INDIVIDUAL BASIN SUMMARY - 2 YR STORM EVENT

Basin Name: DA-3
Group Name: BASE
Simulation: 002YR 24 HR
Node Name: OUTFACE-3
Basin Type: SCS Unit Hydrograph
Unit Hydrograph: Uh464
Peaking Fator: 484.0
Spec Time Inc (min): 0.67
Comp Time Inc (min): 0.67
Rainfall File: Scsii-24
Rainfall Amount (in): 3.700
Storm Duration (hrs): 24.00
Status: Onsite
Time of Conc (min): 5.00
Time Shift (hrs): 0.00
Area (ac): 2.300
Vol of Unit Hyd (in): 1.000
Curve Number: 64.200
DCIA ($): 0.000
Time Max (hrs): 12.01
Flow Max (cfs): 2.933
Runoff Volume (in): 0.818
Runoff Volume (ft3): 6625.546
------------------------
Basin Name: --------------------------------------------------------
DA-4
Group Name: BASE
Simulation: 002YR 24 HR
Node Name: OUTFACE-4
Basin Type: SCS Unit Hydrograph
Unit Hydrograph: Uh484
Peaking Fator: 484.0
Spec Time Inc (min): 1.84
Comp Time Inc (min): 1.84
Rainfall File: Scsii-24
Rainfall Amount (in): 3.700
' Storm Duration (hrs): 24.00
Status: Onsite
Time of Conc (min): 13.80
Time Shift (hrs): 0.00
Area (ac): 21.430
' Vol of Unit Hyd (in): 1.000
Curve Number: 70.200
DCIA ($): 0.000
Time Max (hrs): 12.05
Flow Max (cfs): 29.486
Runoff Volume (in): 1.144
Runoff Volume (ft3): 88958.207
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc. Page 2 of 2

POST-DEVELOPMENT HYDROLOGY: INDIVIDUAL BASIN SUMMARY - 15 YR STORM EVENT

Basin Name: DA-lA
Group Name: BASE
Simulation: O15YR 24 HR
Node Name: WET POND
Basin Type: SCS Unit Hydrograph
Unit Hydrograph: LTh484
Peaking Fator: 984.0
Spec Time Inc (min): 0.67
Comp Time Inc (min): 0.67
Rainfall File: Scsii-24
Rainfall Amount (in): 6.040
Storm Duration (hrs): 24.00
Status: Onsite
Time of Conc (min): 5.00
Time Shift (hrs): 0.00
Area (ac): 25.970
Vol of Unit Hyd (in): 1.001
Curve Number: 91.200
DCIA ($): 0.000
Time Max (hrs): 12.00
Flow Max (cfs): 172.455
Runoff Volume (in): 5.012
Runoff Volume (ft3): 472995.034
Basin Name: DA-1B
Group Name: BASE
Simulation: O15YR 24 HR
Node Name: OUTFACE-1
Basin Type: SCS Unit Hydrograph
Unit Hydrograph: Uh484
Peaking Fator: 484.0
Spec Time Inc (min): 2.21
Comp Time Inc (min): 2.21
Rainfall File: Scsii-24
Rainfall Amount (in): 6.040
Storm Duration (hrs): 24.00
Status: Onsite
Time of Conc (min): 16.60
Time Shift (hrs): 0.00
Area (ac): 25.170
Vol of Unit Hyd (in): 1.000
Curve Number: 66.000
DCIA ($): 0.000
Time Max (hrs): 12.06
Flow Max (cfs): 70.582
Runoff Volume (in): 2.466
Runoff Volume (ft3): 225288.880
' Basin Name: DA-2
Group Name: BASE
Simulation: O15YR 24 HR
Node Name: OUTFACE-2
Basin Type: SCS Unit Hydrograph
Unit Hydrograph: Uh464
Peaking Fator: 464.0
Spec Time Inc (min): 2.40
Comp Time Inc (min): 2.40
Rainfall File: Scsii-24
Rainfall Amount (in): 6.040
Storm Duration (hrs): 24.00
Status: Onsite
Time of Conc (min): 17.99
Time Shift (hrs): 0.00
Area (ac): 12.110
' Vol of Unit Hyd (in): 1.000
Curve Number: 76.900
DCIA ($): 0.000
Time Max (hrs): 12.07
' Flow Max (cfs): 47.092
Runoff Volume (in): 3.499
Runoff Volume (ft3): 153804.009
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.
Page 1 of 2

' POST-DEVELOPMENT HYDROLOGY: INDIVIDUAL BASIN SUMMARY - 15 YR STORM EVENT
Basin Name: DA-3
Group Name: BASE
' Simulation: O15YR 24 HR
Node Name: OUTFACE-3
Basin Type: SCS Unit Hydrograph
Unit Hydrograph: Uh484
Peaking Fator: 484.0
Spec Time Inc (min): 0.67
Comp Time Inc (min): 0.67
Rainfall File: Scsii-24
Rainfall Amount (in): 6.040
Storm Duration (hrs): 24.00
Status: Onsite
Time of Conc (min): 5.00
Time Shift (hrs): 0.00
Area (ac): 2.300
Vol of Unit Hyd (in): 1.000
Curve Number: 64.200
DCIA (8): 0.000
Time Max (hrs): 12.01
Flow Max (cfs): 8.295
Runoff Volume (in): 2.306
Runoff Volume (ft3): 19256.668
--------------------------------------------------------------------------------
Basin Name: DA-4
Group Name: BASE
Simulation: OlSYR 24 HR
Node Name: OUTFACE-4
Basin Type: SCS Unit Hydrograph
Unit Hydrograph: Uh484
Peaking Fator: 484.0
Spec Time Inc (min): 1.84
Comp Time Inc (min): 1.84
Rainfall File: Scsii-24
' Rainfall Amount (in): 6.040
Storm Duration (hrs): 24.00
Status: Onsite
Time of Conc (min): 13.80
Time Shift (hrs): 0.00
Area (ac): 21.430
Vol of Unit Hyd (in): 1.000
Curve Number: 70.200
DCIA (~): 0.000
Time Max (hrs): 12.05
Flow Max (cfs): 76.038
Runoff Volume (in): 2.651
Runoff Volume (ft3): 221792.514
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc. Page 2 of 2

1

f POST-DEVELOPMENT ROUTING RESULTS:
(2-,15-,100-YR, 24-HOUR EVENTS)
1
r

1
1
1
STORMWATER MANAGEMENT CALCULATIONS
' Wal-Mart -Raleigh SE (Sunnybrook)

POST-DEVELOPMENT ROUTING RESULTS: 2 YR 24 HR STORM EVENT
Max Time Max Warning Max Delta Max Surf Max Time Max Max Time Max
Name Group Simulation Stage Stage Stage Stage Area Inflow Inflow Outflow Outflow
hrs ft ft ft ft2 hrs cfs hrs cfs
OUTFACE-1 BASE 002Y024H 0.00 215.000 999.000 0.0000 0 12.08 37.845 0.00 0.000
OUTFACE-2 BASE 002Y024H 0.00 248.000 999.000 0.0000 0 12.08 ~ 0.00 0.000
OUTFACE-3 BASE 002Y024H 0.00 234.000 999.000 0.0000 0 12.00 ~ 0.00 0.000
OUTFACE-4 BASE 002Y029H 0.00 248.000 999.000 0.0000 0 12.08 ~ 0.00 0.000
WET POND BASE 002Y024H 12.27 225.934 245.000 0.0050 42405 12.00 99.152 12.27 14.428
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc. Page 1 of 1

POST-DEVELOPMENT ROUTING RESULTS: 2 YR 24 HR STORM EVENT
Simulation 002Y024H
U
O
C
(d
.~
O
F--
40
30
20
10
OUTFACE-1
OUTFACE-2
OUTFACE-3
~~ OUTFACE-4
0 5 10 15 20 25 30 35
Tim e(hrs)
0
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.

POST-DEVELOPMENT ROUTING RESULTS: 15 YR 24 HR STORM EVENT
Max Time Max Warning Max Delta Max Surf Max Time Max Max Time Max
Name Group Simulation Stage Stage Stage Stage Area Inflow Inflow Outflow Outflow
hrs ft ft ft ft2 hrs cfs hrs cfs
OUTFACE-1 BASE 015Y024H 0.00 215.000 999.000 0.0000 0 12.08 111.555 0.00 0.000
OUTFACE-2 BASE 015Y029H 0.00 248.000 999.000 0.0000 0 12.08 ~i.8~ 0.00 0.000
OUTFACE-3 BASE 015Y024H 0.00 234.000 999.000 0.0000 0 12.00 ~9 0.00 0.000
OUTFACE-4 BASE 015Y024H 0.00 246.000 999.000 0.0000 0 12.08 73.736 0.00 0.000
WET POND BASE O15Y024H 12.14 226.333 245.000 -0.0050 43425 12.00 172.405 12.19 41.618
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc. Page 1 of 1

POST-DEVELOPMENT ROUTING RESULTS: 15 YR 24 HR STORM EVENT
Simulation 015Y024H
120
Ou+f~..il ~
100
80
~~ 4
U
a 60
C
(0
,,.,
O
H
40
20

o~+f~~ 13
o~
0
OUTFACE-1
OUTFACE-2
OUTFACE-3
~~~ OUTFACE-4
5 10 15 20 25 30 35
Tim e(hrs)
Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.

RIP RAP APRON CALCULATIONS
STORMT~T~ATER MANAGEMENT CALCULATIONS
Wal-Mart -Raleigh SE (Sunnybrook)

~~^ KirNey-Hom
\ ~ I 1 and Assodates, Ire.
OUTLET PROTECTION
DESIGN OF RIPRAP LININGS
Project Information
Project Name: Wal-Mart#4447-00, Raleigh, NC (Raleigh SE)
KHA Project #: 015476046
Designed by. JMH Date: 3/13/2007
Revised by: Date:
zs -
20 -
y 15-
F}-
W 10
5-
~ ~r ~' .c e? I I
0' 5' 10' 15' 20' 25'
DIAMETER (Ft.)
Figtu-e 8.06.b.1
All aprons sized using the New York DOT Dissipator Method as outlined by NCDENR (Erosion Control Manual, Section 8.06)
Pipe 10.yr Apron Apron Stone Apron
Description Diameter Velocity Zone Length Width Class Thickness
in (fps) (- (ft) (ft) (-) (in)
30" RCP (Stormwater Oudall From Pond) 30 8.0 2 15 8 B 18
54" RCP (Stortnwater Outfall Into Permanent Pond) 54 12.7 3 36 14 1 24
,6
i~ii~ iii
~~i
iii iii
7
;5
~i~ ~~ii~
~~~
,i~ ,i,
,Z, '3 ~ '4'
,`
Rip-Rap.xls
RipRap Aprons Page 1 of 1

NITROGEN EXPORT CALCULATIONS
(Wal-Mart Raleigh SE (Sunnybrook), Raleigh, NC)
Sources: "City of Raleigh Stormwater Management Design Manual, January 2002"
METHOD 2:
Quantifying TN Export from Residential /Industrial /Commercial Developments when Footprints
of all Impervious Surfaces are shown.
STEP 1: Determine the area for each type of land use and enter in Column (2).
STEP 2: Total the areas for each type of land use and enteral the bottom of Column (2).
STEP 3: Multiply the areas in Column (2) by the TN export coefficients in Column (3) and enter in Column (4).
STEP 4: Total the TN exports for each type of land use and enter at the bottom of Column (4).
STEP 5: Determine the export coefficient for the site by dividing the total TN export from uses at the bottom of
Column (4) by the total area at the bottom of Column (2) and enter the result at the bottom of Column (5).

Nitro en Removal Efficient Percents es
Grass Swale 30.0
Wet Pond 25.D %
Ri avian Buffer 30.0%
Sand Fitter 35.0%
Level S reader 30.0
ConsWcted Wetlands 40.0%
TREATMENT AREA-1
(1) (2) (3) (4) (5) BMP BMP BMP
Type of Land Cover Site TN Export TN Export TN Export TN Removal TN Export TN Export
BMP Area Coeff. by Land Use from Site Efficiency by Land Use From Site
pe (Acres) (Ibs/ac/ r) (Ibs/ r) (Ibs/ac/ r) (%) (Ibs/ r) (Ibslacl r)
Permanently protected Constructed
undisturbed open space Wetland 0.00 0.60 0.00 40.0 % 0.00
forest unmown meadow
Permanently protected Constructed
managed open space (grass, Wetland 4.60 1.20 5.52 40.0 % 3.31
landsca in eta
Proposed: Impervious
surfaces (roads, parking bts, Constructed

driveways, roofs, paved storage
Wetland 21.37 21.20 453.04 40.0 % 271.83
areas eta
TOTAL 25.97 458.6 17.7 275.1 10.59
TREATMENT ARFA_~
(1) (2) (3) (4) (5) BMP BMP BMP
Type of Land Cover Site TN Export TN Export TN Export TN Removal TN Export TN Export
BMP Area Coeff. by Land Use from Site Efficiency by Land Use From Ske
pe (Acres) (Ibs/act r) (Ibsl r) (IbslaG r) (% (Ibsl r Ibs/acl r)
Permanently protect
undisturbed open space Na 3.39 0.60 2.03 0.0 % 2.03
forest unmown meadow
Permanently protect
managed open space (grass, nla 2.07 1.20 2.48 0.0 % 2.48
landsca in etc.
Proposed:lmpervious
surfaces (roads, parking lots,
Na
0.00
21.20
0.00
0
0%
0
00
driveways, roofs, paved storage . .
areas etc.
TOTAL 5.46 4.5 0.8 4.5 O.ti3
OFFSITE ROADWAY
(1) (2) (3) (4) (5) BMP BMP BMP
Type of Land Cover Site TN Export TN Export TN Export TN Removal TN Export TN Export
BMP Area Coeff. by Land Use from Site Efficiency by Land Use From Site
pe (Acres) (Ibs/ac/ r) (Ibs/ r) (Ibs/ac/yr) (%) (Ibs! r (Ibslac/ r)
Permanently proteM
undisturbed open space Na 0.00 0.60 0.00 0.0 % 0.00
forest unmown meadow
Permanently protect
managed open space (grass, Na 0.78 1.20 0.94 0.0 % 0.94
landsca in eta
Proposed: Impervious
surfaces (roads, parking lots,
driveways, roofs, paved storage n/a 2.30 21.20 48.76 0.0% 48.76
areas eta
TOTAL 3.08 49.7 16.1 49.7 16.14
Sl1MMARV TART F

Drains a Area

Area acres
TN (export from site
Ibslacrel r
BMP TN (export
Ibs/ r Final Nitrogen
Loading
Ibslac/ r
Treatment Area-1 25.97 17.7 275.1 10.59
Treatment Area-2 5.46 0.8 4.5 0.83
Offsite Roadwa 3.08 16.1 49.7 16.14
TOTAL 34.51 18.5 329.4 9.54
tstimatetl ~ttset t'ayment Requiretl = (32.6 ac)'(9.47-3.6 Ib/aGyr)'($330/Ib) _ $67,688.41

s
room akcuAnors
.E 15enrrybroek). RalelpM1, Nn
Jeh 2oor
Hwlevn.ns wean peeyHrns
mm
m a caunn PI
n CaVrin (31 m0 elver in CoWmn (4)
bo8am of Ld~mn (4).
1N report rem es•5 m rn< beaam er
rterrlre rtSWt n dx bo[lom of 1.eklnlrl (5)
1N Export 114 Export TN Erpert TN Mseval TN EaP rt TN Expert
G•R W Und Uw hnn Sb El6elernY by EaM Ua• Fron Sls
ObYaahr) MslYr) Rbslaslyr) 1~ lbLyO PbdaeMl
05o DDO 4o DN DaD
-~
126 5.52 406% 3.3f
21.20 453 04 40 51k 211 6]
4565 215.1 1058
PI (q RI ew &!P lk6v
TN Expert lil Expert TH Expert TN Reeewl TH Ezpart ]N Export
© c..+t W una us. re. sb. elnxMaHy by and u» pre. s1u
lbdax Mal r bdaHY•1 114 bfh abd>ehal
060 203 00% 2.D3
! f 1.20 148 ~ OOX 24B _ _
~~ ~ 2121 000 -~ 00N OBD
45 O fi 4.5 D83
OFFSITE ROADWAY
NmlOGEN
TREATxENTAREAS
AREA t
-- j MANAGED OPEN SPACE
i`.;~i 4.60 s
~IMPERYXXISSURFACES
21.37 x
AREA =25.97 x
TN EXPORT = 275.1 Ibslyr
AREA 2
7 UNDISTURBED OPEN SPACE
~' 3.98 ac
MANAGED OPEN SPACE
AREA = 5A6 EIC
TN EXPORT = Iso 6tlyr
OFFSREROADWAY
1 MANAGED OPEN SPACE
IMPERVXwS SURFACES
2.3D x
AREA =3.06 x
TN EXPORT =49.7 6slyr
TOTALAREA=3451ae
TN EXPORT =329.4 02Nyr
FINAL NRROGEN LOADING = 9.54 RISJxJyr
ESTIMATED OFFSET PAYMENT = 567,688.47
~~
D
p
D
P)
TN Expert
Cse1C
IM51asNr) NI
MExpert
by Land Use
MyYrl bl
1N Ex Pert
hem SM
m`aW0 ew
TN Wnswl
9!a»nry
~) N
TN Expert
by UM Uxe
P6Wr1 B!w
TYl Expert
free Slee
PbdaWrl

080 000 DB% 000
lI0 OBS 00X OB4
21.21 d6 ]6 _ 0ON 48.16
49.1 __- 49]
6NV iH hxPert
S61 BB691
BEFORE YOU DIG
~ STOP
TALL 18006324.969
d1ELYk,.~EP
rts T1E uw
GRAPHIC SCALE
(w Peer )
] ;own - 30o n
^:^
Kimley-Hom
and Associates, Inc
nLi~OnE, xceaH can A
ax ow) a>}oera
.•••~,' CARp'•
:'~ti ('.
SEAL
D30661
%9G ~'fy yl HE~~',~1 p:
a S:yN L WPea..
PERMIT SET
RReuknlNnRr
NOT FOR CONSTRUCTION

0
2
6
~W~g
~~~~
~d
~ N WWN.~
~ 8 J F
S
~ N Z
m
W
F» a
5L
W ~ ~~~~
~~ H~~~
b r; o=~~
~z WY3
~w =~_~
~~ UZpZ ~2
~ ~<
Q F
`5 ~ ~
i

W
Q Q
W ~
H Q
Z W
(~ a
Z
DRANK fiT: TCM
CHECKED BY: [{+'Fj
DAh: 05/16/07
PRQIECTt: 015476046
C-10

EXTENDED DETENTION WETLAND
PLANTING AND GRADING PLAN
STORMWATER MANAGEMENT CALCULATIONS
Wal-Mart -Raleigh SE (Sunnybrook)
1

1
1
1
1
1
1
1
1
1
1
1
1

a ~" A ., PoA«LaowTE~
EXTENDED DETENTION WETLAND
SCALE: 1 X30
WETLANDS GRADING & PLANTING NOTES:
TAKEN FROM THE UPDATED DRAFT MANUAL OF STORMWATER BEST MANAGEMENT PRACTICES
1. ADEQUATE ACCESS MUST BE AVAILABLE Fdt INSPECRONS, MAINTENANCE, ANO EQUIPMENT.
2. ALL MAINTENANCE ACRNPES SHOULD BE RECORDED. NOTES SHOULD IN0.UDE THE DATES AND ' gP~&~
PERFORMED THE WORK.
3. DEVELOPMENTAL PHASE MAINTENANCE E%TENDS THRWGH 2 TO 5 GROWING SEASONS ~~
4. AT MATURITY, SOS aF THE INSTALLATION MUST SILL BE GROWING AND HEALTHY.
5. INFERTILE SdLS SHd1lD BE AMENDED BEFORE INSTILLATION ANO THEN FERTUZED PERIODICALLY
6. ACCEPTABLE FERTILIZERS LAN ~: MINERAL, ORGANIC (MANURE). COMPOST OR GREEN CROPS. . °_"~
~. SAPLINGS OF TALL TREES PLANTED IN OR NEAR THE BASIN MAY REQUIRE STAKING. CARE SHd
TREES WHILE STAKING. THE STAKES SHOULD BE KEPT IN PUCE fOR 6 TO 18 MONTHS.
8. NEEDING IS OFTEN NECESSARY IN THE FlRST GRONiNG SEASON. PARTICULARLY IF HERBACEOUS I
VEGETATION GROMM. GRASS SHOULD RE REMOVED TO A80UT fi' ON ALL 90E5 OF THE SdL BII
BELARGELY ELIMINATED BY MININIZING THE AMWNT a SEED USED FOR TEMPORARY EROSION C!
9. SgLS SHd1lD BE LOOSENED TO A OEPTN OF 6'. HARD SdLS MAY REQUIRE DISKING.
10. WHENEVER POSSIBLE. TOPSgL SHOULD BE SPREAD TO A DEPTH OF 4-10' AND LIGHTLY COMPA[
11. THE OPTIMAL PERIOD FOR TRANSPIANTNG EXTENDS FROM EARLY APRIL TO MID-JUNE SO THAT
SEASON TO BUILD THE R00T RESERVES NEEDED TO SURVIVE THE HINTER.
12. POST-NURSERY CARE OF NETLANO PLANTS IS VERY IMPORTANT IN THE INTERVAL BETNEEN DEU ~..
THEY ARE PRONE TO OESICCARpJ. THE STOCK SHOULD BE FREQJENTLY WATERED, FERRU2ED
13. A NET HYDROSEEO MIX OR OTHER METHOD SHOULD BE USED TO ESTABLISH VEGETATVE COVER
FOR RAPID GERMINARON, SCARIFY THE SOIL TO A HALF-INCH PRIOR TO HYDROSEEDING. ~TO^
14. IF THE NEIUND WAS USED DURING CONSTRUCTION AS A SEDIMENT BASH di TRAP, THE BASIN I '~,J..
NITHIN 14 DAYS ~ THE COMPLERON pF THE CONSTRUCTION, FRONDED THAT 7HE DRAINAGE A GLET ~0632~D19
15. BECAUSE MOST STORAIWATER WEIUNDS ARE EXCAVATED TO DEEP SUB-SdLS. THEY OFTEN UC xc a(~ut1
SUPPORT NGOROUS GROWTH OF PLANTS. AT THESE STIES, 12' OF TOPSOIL OR NETLAND MULCH !~-±K~
WETUNO FROM 1 F00T BELOW THE NORMAL POOL TO 6' ABOVE. WETLAND MULCH IS DEFINED
SPREADING THE TOP 12' OF WETUND SdL FRpA A DONOR METLANO OVER THE SURFACE OF A
16. THE NElUNO DRAIN SHOULD BEAFULLY OPENED FOR 0 MORE THANd3 DAIS PRIOR TO THE PL SEE GENERAL NOTES SHEET
wnRKABIUn. FOR SITE PLAN NOTES
)NSTRUCTION TO BE IN ACCORDANCE WITH ALL
F RALEIGH STANDARDS AND SPECIFICATIONS."
GRAPHIC SCALE
( D+ TEET )
T mDn = Do n
PLAN
.' z~LY RY~R HD~
PaME „WAxO Ir ~ µ~~
ronKl eADmiL MA ....--
Tmi/n ar
~_-r ~ FRORp51~ ~~ BNL
`A NmF. sLE LANDSCAPE NmES Lm ra nPE v RuLa uARw.L To ug
~v ;
~X. Y.~
;`j ,;;; TREE PLANTING ON SLOPE
N.T.S.
WA4MART STANDARD DL7AL
ENTERING ROPE 3 TO 1 YAX FDR ROPE
$IABIUlAnIXI AND PLANT YAIERIAL
AdIARt PLANT MAIER1Al (TYP.).
SEF PLANIWC PLAN.
SEE PLANT UST Fdi MAX PLANTING DEPTH
PdID NORMAL WATER LE4EL
PMD 90E ROPES 3 TO 1 MAX
PLANT ALL AWARC MATERIAL IN
1OP501L SEE NOTES FOR DFPTX O< TOPSOIL
EpSRNG UNdSTURBFD AIBGRApE
WATER WETLAND AREA PLANT DETAIL
N.T.S
^~~. (SEE LANDSCAPE NDTES
Fdt TYPE OF MOLd1 )
\~ ~ ~-REMOVE BNRLAP h ROPE
Y xvA FROM TOP 1/1 Df BALL
BACKF6L MI%
dSNPBED SUBSdL
SHRUB PLANTING ON SLOPE
Zz'L N.T.S.
+ WALJDMRWT~~DA~IDEfA1L
Kimley-Horn
and Associates, Inc
.~, ~AAI~„E PA~ d~~
a~~oTmiF, xPB,N ~Aan,xA ze
`A%~ `aw1 ~ s"
© m
PERMIT SET
PRELMINARY
NOT FOR CONBTRUCTION
W
~ ~~~
Q~ o~~~
w wg~_
O WyI<~
M D N W ..
a o~~~
r ,°N
F~ ; o
w
~ m
W Q
~ ¢
~~ Z~~~
$ ~¢~~
Y N ~ Y
Fz wY3
F CT L1
~O a~wz
V! Q Q
J ul
a
~3
O
Z
f~
V
Z
0 'w
//~~ Zv
V r
Z
Z~
J
F
DESIGNED BY: )()(
DRANK BY: ~(.JB
CHECKED BY: J$/{
C-23

COPY OF U.S. ARMY CORPS OF ENGINEERS
SECTION 404 GENERAL PERMIT
STORMWATER MANAGEMENT CALCULATIONS
Yi'al-Mart -Raleigh SE (Sunnybrook)

U.S. ARMY CORPS OF ENGINEERS
WILMINGTON DISTRICT

Action ID. SAW-2006-20745 County: Wake USGS Quad: Garner/Ralei~h E
GENERAL PERMIT (REGIONAL AND NATIONWIDE) VERIFICATION
' Property Owner /
Authorized Agent:

1

Romans Land Development/ Todd Tu~vvell,l{imlev-Horn and Associates
Address: Attn: Michelle Leach Horner
100N Coslett Court
Cary, NC 27513
Telephone No.: 910 457-0777
Size and location of property (water body, road name/number, town, etc.): The site is located in the northeast
quadrant of Rock Quarry and Sunnybrook Roads in Raieiah, Wake County, North Carolina and is
identified as Wal--Mart Store 4447-00 Ralei h SE. A uahc features on site drain to Walnut Creek m the
Neuse River Basin.
Description of projects area and activity: This permit verification allows for permanent impacts to 0.20-
acre of wetlands, and 371inear feet of streams lacking important aquatic functions. Mitigation ~s
required for the permanent impacts to wetlands but not for streams lackms unportant aquatic functions
(see Permit Condition below.
Applicable Law: ®Section 404 (Clean Water Act, 33 USC 1344)
^ Section 10 (Rivers and Harbors Act, 33 USC 403}
Aut'r~orization: Regional General Permit Number:
Nationwide Permit Number: 39
Your work is authorized by the above referenced permit provided it is accomplished in strict accordance
with the attached conditions and your submitted plans. Any violation of the attached conditions or deviation
from your submitted plans may subject the pernuttee to a stop work order, a restoration order and/or appropriate
legal action.
This verification is valid until the NWP is modified, reissued, or revoked. All of the existing NWPs are
scheduled to be modified, reissued, or revoked prior to March 18, 2007. It is incumbent upon you to remain
informed of changes to the NWPs. We will issue a public notice when the NWPs are reissued. Furthermore, if
you commence or are under contract to commence this activity before the date that the relevant nationwide
permit is modified or revoked, you will have twelve {12) months from the date of the modification or revocation
of the NWP to complete the activity under the present terms and conditions of this nationwide permit. If, prior
to the expiration date identified below, the nationwide permit authorization is reissued and/or modified, this
verification will remain valid until the expiration date identified below, provided it complies with all new and/or
modified terms and conditions. The District Engineer may, at any time, exercise his discretionary authority to
modify, suspend, or revoke a case specific activity's authorization under any NWP.
Activities subject to Section 404 (as indicated above} may also require an individual Section 401 Water
Quality Certification. You should contact the NC Division of Water Quality {telephone [phone]) to
determine Section 401 requirements.
For activities occurring within the twenty coastal counties subject to regulation under the Coastal Area
Management Act (CAMA), prior to beginning work you must contact the N.C. Division of Coastal
Management .
Page 1 of 3

This Department of the Army verification does not relieve the permittee of the responsibility to obtain any
other required Federal, State or local approvals/permits.
If there are any questions regarding this verification, any of the conditions of the Permit, or the Corps of
Engineers regulatory program, please contact Jamie Shern [phone] ext 31.
Permit Condition:
In order to compensate for impacts to 0 20-acre of non-riparian wetlands the permittee shall make
' payment to the North Carolina Ecosystem Enhancement Program (NC EEP} in the amount
~1 determined by the NC EEP, sufficient to perform the restoration of 0.40-acre of non-riparian ~er»
wetlands in the Neuse River Basin, Cataloging Unit 03020201.
VV
Construction within jurisdictional areas on the property shall begin only after the permittee has made full
payment to the NC EEP and provided a copy of the payment documentation to the Corps, and the NC EEP has
' provided written confirmation to the Corps that it agrees to accept responsibility for the mitigation work
required, in compliance with the MOU between the North Carolina Department of Environment and Natural
Resources and the United States Army Corps of Engineers, Wilmington District, dated November 4, 1998.
**Note: Habitat type may be described as found in Schafale and Weakley, Classification of the Natural
Communities of North Carolina, Third Approximation, 1990; or in accordance with Cowardin, et al (1979),
Classification of Wetlands and Deepwater Habitats of the of the United States.**
' Corps Regulatory Official: Date: January 16.2007
' Expiration Date of Verification: arch 18.2007

1

1

' Page 2 of 3

1
' WILMINGTON DISTRICT
POST-CONSTRUCTION COMPLIANCE FORM
' Action ID Number: SAW-2006-20745 County: Wake
' Permittee: Michelle Leach Horner
for Wal--Mart Store 4447-00 Raleigh SE, North Carolina
' Date Permit Issued: 1/16107
' Project Manager: Jamie Shern
Upon completion of the activity authorized by this permit and any mitigation required by the permit,
sign this certification and return it to the following address:
US Army Corps Of Engineers
Wilmington District
Raleigh Regulatory Field Office
6508 Falls Of The Neuse Road
Suite 120
' Raleigh, North Carolina 27615
Please note that your permitted activity is subject to a compliance inspection by a U. S. Army Corps of
Engineers representative. If you fail to comply with this permit you are subject to permit suspension,
modification, or revocation.
I hereby certify that the work authorized by the above referenced permit has been completed in
accordance with the terms and condition of the said permit, and required mitigation was completed in
accordance with the permiCconditions.
' Signature of Permittee Date
Page 3 of 3

NATIONWIDE PERNIIT 39 .
DEPARTMENT OF THE ARMY
CORPS OF ENGINEERS
FINAL NOTICE OF ISSUANCE AND MODIFICATION OF NATIONWIDE PERMITS
' ~ FEDERAL REGISTER
AUTHORIZED MARCH 18, 2002
Residential, Commercial, and Institutional Developments. Discharges of dredged or fill
material irito.non-tidal waters of the United States, excluding non-tidal wetlands adjacent to tidal
' waters, for the construction or expansion of residential,.commercial, and institutional building
foundations and building pads and attendant features that are necessary for the use and
maintenance of the structures. Attendant features may include, but are not limited to, roads,
' parking lots, garages, yards, utility lines, stormwater management facilities, and recreation
facilities such as playgrounds, playing fields, and golf courses (provided the golf course is an
integral part of the: residential development). The; construction of new ski areas or oil and gas
~' wells is not authorized by this nationwide permit.
Residential developments include multiple and single unit developments. Examples of
commercial developments include retail stores, industrial facilities, restaurants, business parks,
and shopping centers. Examples of institutional developments include schools, fire stations,
government office buildings, judicial buildings, public works buildings, libraries, hospitals, and
places of worship. The activities listed above are authorized, provided the activities meet all of
the following criteria: .
' A. The discharge does not cause the loss of greater than \1/2\ acre of non-tidal waters of the
United States, excluding non-tidal wetlands adjacent to tidal waters;
B. The discharge does not cause the loss of greater than 3001inear feet of a stream bed; .unless:
for intermittent stream beds this criterion is waived in writing pursuant to a.determination by the'
District Engineer; as specified below; that the project complies with all terms and conditions of
this nationwide permit and that any adverse impacts of the projecton the aquatic environment aze
minimal, both individually and cumulatively;
' C. The permittee must notify the District Engineer in accordance with General Condition. l 3, if
any of the following criteria are met:
1 _ The discharge causes the loss of greater than 11/10\ acre of non-tidal waters of the United
States, excluding non-tidal wetlands adjacent to tidal waters; ar
2. The discharge causes the loss of any open waters, including perennial or intermittent
streams, below the ordinary high water mark (see Note, below), or
' 3. The discharge causes the loss of greater than 300 linear feet of intermittent stream bed.
In such case, to be authorized the District Engineer must determine that the activity complies
i

with the other terms and conditions of the nationwide permit, determine adverse
environmental effects are minimal both individually and cumulatively, and waive the.
limitation on stream impacts in writing before the permittee may proceed:
D. For discharges in special aquatic sites,`including wetlands, the notification-must include a
delineation of affected special aquatic sites;
' E. The discharge is part of a single and complete project;

r F. The permittee must avoid and mizumize discharges into waters of the United States at the
when required, must include a
The notification
racticable
extent
i
h
,
.
p
mum
e max
project site to t
written statement explaining how avoidance and minimization of losses of waters of the United
States were achieved on the project site. Compensatory mitigation will normally be required to
n
ti
tifi
Th
i ca
o
e. no
offset the losses of waters of the United States...{See- General Condition 19.)
must also include a compensatory mitigation proposal for offsetting unavoidablelosses of waters
of the United States. If an applicant asserts that the adverse effects of the project are minimal
mpensato
h
i
i ry
y.co
ng w
without mitigation, then the applicant may submit justification explain
mitigation should not be required for the District Engineer's consideration;
G. -When this nationwide permit is used in conjunction with any other nationwide permit, any .
combined total permanent loss of waters of the United States exceeding 11/101 acre requires that
the pennittee notify the District Engineer in accordance with General Condition 13;
' w rk authorized b this nationwide rmit must not cause more than minimal . "
H. Any o Y Pe
degradation of water quality or more than minimal changes to the flow characteristics of any
' stream (see General Conditions 9 and 21);
I. For discharges causing the loss of \1/101 acre or less of waters of the United States, the
' permittee must submit a report, within 30 days of completion of the work, to the District
"
~ '.
Engineer that contains the following information: (1) The name,: address, and telephone number
of the permittee; (2) The location of the work; (3) A description of the work; (4) The type and
' acreage of the loss of waters of the United States (e.g.,11/2\ acre of emergent wetlands); and (5)
The type and acreage of any compensatory mitigation used to offset the lass "of waters of the
United States (e.g.,11/21 acre of emergent wetlands created on-site);
J. If there are an o en waters or streams within the project azea, the permittee will establish
Y P
and maintain, to the maximum extent practicable, wetland or upland vegetated buffers next to
' those open waters or streams consistent with General Condition 19. Deed restrictions,
conservation easements, protective .covenants, or other means of land conservation and
preservation are required to protect and maintain the vegetated bufeers established on the project
' site. . .

i 2

1

Only residential, commercial, and institutional activities with structures on the foundation(s)
or building pads}, as well as the attendant features, are authorized by this nationwide permit.
The compensatory mitigation proposal required in paragraph (f) of this nationwide permit maybe
either conceptual or detailed.. The wetland or upland vegetated buffer required in paragraph (j) of
this nationwide permit will determined on a case-by-case basis by the District~Engineer for
addressing water quality concerns. The required wetland or upland vegetated. buffer is part of the
overall compensatory mitigation zequirement for this nationwide permit. If the project site was .
previously used for agricultural purposes and the farm owner/operator used Nationwide Permit
40 to authorize activities in waters of the United States to increase production or construct-farm
buildings, Nationwide Permit 39 cannot be used by the developer to authorize additional
activities in waters of the United States on the project site in excess of the acreage limit for .
Nationwide Permit 39 (i.e., the combined acreage loss authorized under Nationwide Permits 39
and 40 cannot exceed \l/21 acre).
5.r•_.~,. - .
. ;-::Subdivisions: For residential subdivisions; the aggregate total loss of waters of Unites States
authorized by Nationwide Permit 39 can not exceedli/2\ acre. This includes any loss of waters
associated with development of individual subdivision lots. (Sections; l0 and 404) .
Note: Areas where wetland vegetation is not present should be determined by the presence or
absence of an ordinary high water mark or bed and bank. Areas that are waters of the United .
States based on this criterion: would require aPre-Construction Notification (PCN) although
water is infrequently present in the stream channel (except far ephemeral waters, which do not
.require PCNs under pazagraph (c)(s), above; however, activities that result.in-the loss of greater ,
than\l/10\ acre of ephemeral waters would require PCNs under-paragraph (c)(1}, above) are
determined by the presence or absence .of an ordinary high water mark or bed and bank.•Areas
that are waters of the United States based on this criteria would require a PCN even though water
is infrequently present in the stream channel (except for ephemeral waters}.
3.

NATIONWIDE PERMIT GENERAL CONDITIONS
The following General Conditions must be followed in order for any authorization by a
NWP to be valid: , -
..l.~Navigation. No activity may cause more than a minimal adverse effect on navigation.
2. Proper Maintenance. Any structure or fill authorized shall be properly maintained,
including maintenance to ensure public safety.
3. Soil Erosion and Sediment Controls. Appropriate soil erosion and sediment controls
mustbe used and maintained ineffective operating condition during construction, and all
exposed soil and other fills, as well as any work below the ordinary high -water mark or high tide
line, must be permanently stabilized at the earliest-practicable date. Permittees are encouraged to
perform work within waters of the United States during periods of low-flow or no-flow.
4. Aquatic Life Movements. No activity may substantially disrupt.the necessary life-cycle
movements of those species of aquatic life indigenous to the waterbody, including those species
that normally migrate through the area, unless the activity's primary purpose is to impound water.
Culverts placed in streams must be installed to maintain low flow conditions.
5. Equipment. Heavy equipment working in wetlands must be placed on mats, or other
measures must be taken to minimize soil disturbance.
6. Regional and Case-By-Case Conditions. The activity must comply with any regional
conditions that may have been added by the Division Engineer (see 33 CFR 330.4(e)) .and with
any case specific conditions added by the Corps or by the state or tribe in its Section 401 Water
Quality Certification and Coastal Zone Management Act consistency determination.
7. Wild and Scenic Rivers. No activity may occur in a component of the National Wild and
Scenic River System; or in a river officially designated by Congress as a'study river" for possible
inclusion in the system, while the river is in an official study status; unless the appropriate
Federal agency, with direct management responsibility for such river, has determined in writing
that the proposed activity will not adversely affect the Wild and Scenic River designation, or
study status. Information on Wild and Scenic Rivers maybe obtained from the appropriate
Federal land management agency in the area (e.g., National Park Service, U.S. Forest Service,
' Bureau of Land Management, U.S. Fish and Wildlife Service).
8. Tribal Rights. No activity or its operation may impair reserved tribal rights, including,
but not limited to, reserved water rights and treaty fishing and hunting rights.
9. Water Quality. .
4

1
1
A
1
1
1
1
1
1
a. In certain states and tribal lands an individua1401 Water Quality Certif cation must be
obtained or waived (See 33 .CFR 330.4(c)).
b. For NWPs i2, 14,.17, 18, 32, 39, 40, 42, 43, and 44, where the state or tribal 401
certification (either generically. ox individually) does not require or approve water quality
management measures, the permittee-must provide water quality managementmeasures that will
ensure that the authorized work does not result in more than minimal degradation of water
quality (or .the Corps determines that compliance with state or local standards, where applicable,
-will ensure no .more than minimal adverse effect on water quality). An important component of
water quality management includes. stormwater management that minimises degradation of the
downstream, aquatic system, including water quality (refer to General Condition 21 for
stormwater management requirements}. Another important component of water quality
management is the establishment and maintenance of vegetated buffers next to open waters,
.including streams (refer to General Condition 19 for vegetated buffer requirements for the,
1\VJEs}: .:.
This condition is only applicable to projects that have the potential to affect water quality.
While appropriate measures must be taken, inmost cases it is not necessary to conduct detailed
studies to identify such measures or to require monitoring.
l0. Coastal Zone Management. In certain states, an individual state coastal zone
management consistency concurrence must be obtained or waived (see 33. CFR 330.4(d)).
11. Endangered Species.
a: No activity is authorized under any NWP which is likely to jeopardize the continued:
existence. of a threatened or endangered species or a species proposed for such designation; as
identified under the Federal Endangered Species Act (ESA}, _or which will destroy or adversely.
modify the critical habitat of such species. Non-federal permittees shall notify the District
Engineer if any listed species or designated critical habitat might be affected or is in the vicinity
of the project, or is located in the designated critical habitat and shall not begin work on the
activity until notified by the District Engineer that the requirements of the ESA have .been
satisfied. and that the activity is authorized. For activities that may affect Federally-listed
endangered or threatened species or designated critical habitat, the notification must include the
name(s) of the endangered or threatened species that may be affected by the proposed work or
that utilize-the designated critical habitat that maybe affected by the proposed work. As a result
of formal or informal consultation with the FWS or NMFS the District Engineer may add
species-specific regional endangered species conditions to -the NWPs.
b. Authorization of an activity by a NWP does not authorize the "take" of a threatened
or endangered species as defined under the ESA. In the absence of separate authorization (e.g., an
ESA Section 10 Permit, a Biological Opinion with "incidental take" provisions; etc.) from the
USFWS or the NMFS, both lethal and non-lethal "takes" of protected species are in violation of
the ESA. Information on the location of threatened and endangered species and their critical
5

habitat can be obtained directly from the offices of the USFWS and NMFS or their World Wide
Web pages at http:l/www.fws.gov/r9endspp/endspp.html and http://www.nfiris.noaa.gov/prot
res/overview/es.html respectively.
i 12.~Historic Properties. No activity that-may affect historic:properties listed, or eligible for
listing, in the National Register of Historic Places is authorized, until the District Engineer has
complied with the provisions of 33 CFR part 325, Appendix C. The prospective permittee must
' notify the District Engineer if the authorized activity may affect any lstoric properties listed,
determined to be eligible, or which the prospective permittee has reason to believe may be
eligible for listing on the National Register of Historic Places, and shall not begin the activity
until notified by the District Engineer that the requirements of the National Historic Preservation
Act have been satisfied and that. the activity is authorized. Information on the location and-
existence of historic resources can be obtained from the State Historic Preservation Office anti
' the National Register of Historic Places (see 33 CFR 33Q.4(g)). For activities thatmayaffect `
historic properties listed in, or eligible for listing in; the National Register of Historic Places, the •
notification must state which historic property maybe affected by the proposed work or include a
vicinity map indicating the location of the historic property.
13. Notification.
a. Timing; where required by the terms of the NWP the prospective permittee must
notify the District Engineer with a preconstruction notification (PCN) as early as possible, The
District Engineer must determine if the notification is complete within 30 days of the date of
receipt and can request additional information necessary to make the PCN complete only once. .
However, if the prospective permittee does not provide all of the requested information, then the
' District Engineer will notify the prospective permittee that the notification is still .incomplete and
the PCN review process will not commence until all of the requested information has been
received by the District Engineer: The~prospective permittee shall not begin the activity:
1. Until notified in writing by the District Engineer that the activity may proceed
under the NWP with any special conditions imposed by the District or Division Engineer; or
. 2. If notified in writing by the District or Division Engineer that an Individual .
Permit is required; or
' 3.' Unless 45 days have passed from the District Engineers receipt of the complete
notification and.the prospective permittee has not received written notice from the District, or
f Division Engineer. Subsequently; the perinittee's right to proceed under the NWP may be
modified, suspended, or revoked only in accordance with the procedure set forth in 33 CFR
330..5(d)(2).
ntents of Notif~cation:~ The notification must be in writing and include the
b. Co
following information:
..
6

1. Name, address and telephone numbers of the .prospective permittee;
2.:Location of the .proposed project; - .
1
1
1
1
1
1
1
1
1
1
1
1
1
1
. 3.13rief description of the proposed project; the project's purpose; direct and indirect
adverse environmental effects the project would cause;• any other NWP(s), Regional General
Permit(s), or Individual Permit(s) used or intended to be used to authorize any part
of the proposed project or any related activity: Sketches should be provided when necessary to
show that the activity complies with the terms. of the NWP (Sketches usually clarify the project .
and when provided result in a quicker decision.); -
4. For NWPs 7;12,14,18, 21,.34, 38, 39, 40, 41, 42, and 43, the PCN
must also include a delineation of affected special aquatic sites, including wetlands, vegetated
shallows (e.g., submerged aquatic vegetation, seagrass beds), and.rifIle and pool complexes (see
paragraph 1-3 (f));
. >; ~5. For NWP 7 (Cutfall Structures and Maintenance), the PCN must include
information regarding the original design capacities and configurations of those areas of the
facility where maintenance dredging or excavation is proposed; - ~ -
6. For NWP 14 (Linear Transportation Projects), the PCN must include a
compensatory mitigation proposal to offset permanent losses of waters of the US and a: statement
describing how temporary losses of waters of the ~US will be minimi?ed to the maximum extent
practicable;
7. For NWP 21 (Surface Coal Mining Activities), the PCN must include an Office
of Surface Mining (OSM) or state-approved mitigation plan, if applicable. To be authorized by
this NWP, the District Engineer must determine that the activity complies with the terms and
conditions of the NWP and that the adverse environmental effects are minimal both individually
and cumulatively and must notify the project sponsor. of this determination in writing;
8. For NWP 27 .(Stream and Wetland Restoration Activities}, the PCN must include
documentation of the prior condition of the site that will be reverted by the permittee;
9. For NWP 29 (Single-Family Housing), the PCN must also:include:
i. Any past use of this NWP by the Individual Permittee and/or the permittee's
spouse;
ii. A statement that the single-family housing activity is for a personal residence
of the permittee;
. iii. A .description of the entire parcel, including its size, and a delineation of
wetlands. For the purpose of this NWP, parcels of land measuring \1/41-acre or less will not

1

1

1

1

require a formal on-site delineation. However, the applicant shall provide an indication of where
the wetlands are and the amount of wetlands that exists on the property. For parcels greater than
\1/41-acre in size, formal wetland delineation must be pxepared in accordance with-the current
method required by the Corps. (See paragraph I3(f}};
iv. A written description of all-land (including, if available,'legal descriptions)
owned by the prospective permittee and/or the prospective permittee's spouse, within c one mile
radius of fhe parcel, in any form of ownership (including any land owned as a partner,
corporation, joint tenant, co-tenant, _or as atenant-by-the-entirety) and any land on which a
purchase and sale agreement or other contract for sale or purchase has been executed;
10. Far. NWP 31 (Maintenance of Existing Flood Control Facilities), the prospective
permittee must either notify the District Engineer with a PCN prior to each maintenance activity
or submit save-year (or less) maintenance plan. In addition, the PCN must include ail of the
following:
i. Sufficient baseline information identifying-the approved. channel depths and
configurations and existing facilities. Minor.deviations.are authorized,:provided the.approved .
flood control protection or drainage is not increased;
ii. A delineation of any affected special aquatic sites; including wetlands; and,
:iii. Location of the dredged material disposal site;
1 1. For NWP 33 (Temporary Construction, Access, and Dewatering), the PCN must
also include a restoration plan of reasonable measures to avoid and minimize adverse effects to
aquatic resources;
12. For NWPs 39, 43 and 44, the .PCN must also include a written statement to the
District Engineer explaining how avoidance and minimization for losses of waters of the US
were achieved on the project site; .
13. For NWP 39 and NWP 42; the PCN must include a compensatory mitigation '
proposal to offset losses of waters ofthe US or justification explaining why compensatory
mitigation should not be required. For discharges that cause.the loss of greater than 300 linear
feet of an intermittent stream bed, to be authorized, the District Engineer must determine that the
activity complies with the other terms and conditions of the NWP, determine adverse
environmental effects are minimal both individually and cumulatively, and waive the limitation
on stream impacts in writing before the permittee may proceed;
14. For NWP 40 (Agricultural Activities), the PCN must include a compensatory
mitigation proposal to offset losses of waters of the US. This NWP does not authorize the
relocation of greater than 304' linear feet of existing serviceable drainage ditches constntcted in.
non-tidal streams unless, for drainage ditches constructed in intermittent nontidal streams, the
8
1
1

District Engineer waives this criterion in writing, and the District Engineer has determined that
the project~complies with all-terms and conditions of this NWP, and that any adverse. impacts of
' the project on_the aquatic environment_are minimal; both individually and cumulatively;
t .15. For NWP 43 (Stormwater Management Facilifies), the PCN must include, far
the construction of new stormwater management facilities, a maintenance plan~(in accordance
with state and local requirements, if applicable) and. a compensatory. mitigation proposal to offset
losses of waters of the US. For discharges that cause the.loss of greater than 3Q0 linear feet of an
intermittent .stream bed, to be authorized, the District Engineer must determine that the activity
complies with the other terms and conditions of the NWP, determine adverse .environmental
' effects are minimal both individually and cumulatively,. and waive the limitation on stream
impacts in writing before the permittee may proceed;
_, _. ::.16. For NWP 44 (Mining Activities), the PCN must include a description. of all
waters of the US adversely affected by the project, a description of measures taken.to minimize
adverse effects to waters of the US, a description of measures taken to comply with the criteria of
the:NWP,.and a reclamation plan (for all aggregate mining activities in isolated waters and
non-tidal wetlands adjacent to headwaters. and any lard rock/mineral mining activities); .
' l7. For activities that may adversely affect Federally-listed endangered or
threatened species, the PCN must include the name(s).of those endangered or threatened species
that maybe affected by the proposed work or utilize the designated critical habitat that may be
' ~ affected by the proposed work; and
18: For activities that. may affect historic properties listed in, or eligible for listing
in, the National Register of Historic Places, the PCN must state which historic, property maybe
' affected by the proposed work or include avicinity-map indicating the location.of the historic:
property.
' a-Form of Notification: The standard Individual Permit application form (Form ENG
4345) may be used as the notification but must clearly indicate that it is a PCN and must include
all of the information required in (b) (1)-(18) of General Condition 13. A letter containing the
' requisite information may also:be used.
' d. District Engineer's Decision: In reviewingahe PCN for the proposed activity,~the
District Engineer will determine whether the activity authorized by the NWP will result in more
than minimal individual or cumulative adverse environmental effects or may be contrary to the
' public interest: The prospective permittee may submit a proposed mitigation plan with the PCN
to expedite the process. The District Engineer will consider any proposed compensatory
mitigation the applicant has included in the proposal in determining whether the net adverse
' environmental effects to the aquatic~environment of the proposed work are minimal. If the
District Engineer determinesthat-the activity complies with the terms and conditions of the NWP
and that the adverse effects on the aquatic environment are minimal, after considering mitigation,
the District Engineer will notify the permittee and include any conditions the District Engineer
9

deems necessary. The District Engineer must approve any compensatory mitigation proposal
' before the permittee corzimezices work: If the prospective permittee is required to submit a
compensatory mitigation proposal with the PGN, the proposal may be either conceptual or
detailed. If the prospective permittee elects to submit a compensatory mitigation plan with the
r ~ PCN, the District:Engineer will expeditiously review the proposed compensatory mitigation plan.
The District Engineer must review the plan within 4S days of receiving a complete PCN and
determine whether the conceptual or specific proposed mitigation would ensure no more than
' minimal adverse effects on the aquatic environment.~If the net adverse effects of the project on
the aquatic environment (after consideration of the compensatory mitigation proposal} are
determined by the District Engineer to be minimal, the District Engineer will provide a timely
written response to the applicant. The response will state that the project can proceed under the
terms and conditions of the NWP.
' If the District Engineer determines that the adverse effects of the proposed work are more
• than minimal, then the District Engineerwill notify the applicant. eithei:
' 1. That the project does not qualify for authorization under the NWP.and instruct
the applicant on the procedures to seek authorization under an Individual Permit;
' ~ 2. that the project is authorized under the NWP subject to the applicant's submission
of a mitigation proposal that would:reduce the adverse effects on the aquatic environment to the
minimal level; or
' 3. that the roject is authorized under the NWP with specific modifications or
P
conditions. Where .the District Engineer determines that mitigation is required to ensure no more
' than minimal adverse effects occur to -the aquatic environment, the activity will be authorized
within the 45-day PCN period. The authorization will include the necessary conceptual or
specific mitigation or a requirement that the applicant submit a mitigation proposal that would ,
' reduce the adverse effects on the aquatic environment to the minimal level. When conceptual
mitigation is included, or a mitigation plan is required under item (2) above, no work in waters of
the US will occui until the District Engineer has approved a specific mitigation plan.
' e. A enc Coordination: The District Engineer will consider any comments from
g Y
Federal and state agencies concerning the proposed activity's compliance with the terms and
' conditions of the NWPs and the need for mitigation to reduce the project's adverse environmental
effects to a minimal level.:
' 'For activities requiring notification to the District Engineer that result in the loss of greater
than 11/21-acre of waters of the US, the-District Engineer will provide immediately (e.g., via
facsimile transmission, overnight mail, or other expeditious manner) a copy to the appropriate
' Federal or state offices (USFWS, state natural resource or water quality agency, EPA, State
Historic Preservation Officer (SHPO), and, if appropriate, the NMFS): With the exception of
NWP 37, these agencies will then have i 0 calendar days from the date the material is transmitted
to telephone or fax the District Engineer notice that they intend to provide substantive,
10

site-specific comments. If so contacted by an agency, the District Engineer will wait an
additional 15 calendar, days. before making a decision.on the. notif cation. The District Engineer
will fully consider agency comments received within the specified time frame, but will provide
no response to the resource agency, except as provided below. The District Engineer will indicate
in the administrative record associated with each notification that the resource agencies' concerns
were considered. As requited by section 305(b)(4)(B) of the Magnuson-Stevens Fishery
Conservation and Management Act, the District Engineer will provide a.response to. NMFS
within 30 days of receipt ofany-Essential Fish Habitat conservation recommendations.
Applicants are encouraged to provide the Corps multiple copies of notifications to expedite
agency notificarion.
f Wetland Delineations: Wetland delineations must be prepared in accordance with the
current method required by the Corps (For NWP 29 see paragraph (b)(9)(iii) for parcels less than
(11!41-acre in size). The permittee mayask the Corps.to delineate the special aquatic site. There
maybe some delay if the Carps does'the delineation. Furthermore, the 45-day period will not
start until the wetland delineation has been completed and submitted to the Corps, where
appropriate:-=:
14_ Compliance Certification. Every permittee who has received NWP verificatYOn from the
Corps will submit a signed certification regarding the completed work and any required
mitigation. The certification will be forwarded by the Corps with the authorization letter and will
include: -
- . a..A statement that the authorized work was done in accordance with the Corps
authorization, including any general or specific conditions;
b. A statement that any required mitigation was 'completed in accordance with the
permit conditions; and -
c. The signature of the peninittee certifying. the completion of the work and mitigation.
15. Use of Multiple Nationwide Permits. The use of more than one NWP.~for a single and
' complete project is prohibited, except when tha acreage. loss of waters of the US authorized by
the NWPs does not exceed the acreage limit of the NWl' with the highest specified acreage limit
' (e.g. if a road crossing over tidal waters is constructed under NWP 14, with associated bank
stabilization authorized by NWP 13, the maximum acreage loss of .waters of the US for the total-
project cannot exceed 11/3\-acre) .
' 16. Water Supply Intakes, No activity, including structures and work in navigable waters of
the US or discharges of dredged or fill material, may occur in the proximity. of.a public water
' supply intake except where the activity is for repaix of the public water supply intake structures
or adjacent bank stabilization.
17. _ Shellfish Beds. No activity, including structures and work in navigable waters of the US
11

- or discharges of dredged. or fill material, may occur in areas of concentrated shellfish
' populations, unless the activity: is directly related to a shellfish harvesting activity .authorized by
NWP 4.
' •:18. Suitable Material. No activity, including structures and work in navigable waters of the
.- US or discharges of dredged or fill material, may consist of unsuitable material- (e:g., trash,
.debris, car bodies; asphalt, etc.) and material used for construction or discharged must be free
from toxic pollutants in toxic amounts (see section 307 of the CWA}.
19. Mitigation. The District Engineer will consider the factors discussed below when-
determining the acceptability of appropriate and practicable mitigation necessary to offset
adverse effects on the aquatic environment that are more than minimal.
a. The project must be designed and constructed to avoid and minimize adverse effects
to waters of the US to the maximum extent practicable at the project site (i:e.; on site).
1 b. Mitigation in all its forms (avoiding, minimizing, rectifying, reducing or
compensating) will be required to the extent necessary. to ensure that the adverse .effects to the
aquatic environment are inixumal: - -
' ~ c. Compensatory mitigation at a minimum one-for=one ratio will be required for all
wetland impacts requiring a PCN, unless the District Engineer determines in writing that some
other form of mitigation would be more environxrientally appropriate and provides a
project-specific waiver of this requirement. Consistent with National policy, the District Engineer .
will establish a preference for restoration of wetlands as compensatory mitigation, with
preservation used only in exceptional circumstances.
d. Compensatory mitigation (i.e., replacement or substitution of aquatic resources for
those impacted) will not be used to increase the acreage losses allowed by the acreage limits of .
same of the NWPs. For example,ll/4\-acre of wetlands cannot be created to change a,\3/4\acre
loss of wetlands to a \1/21-acre loss associated with NWP 39 verification. However, \1/2\-acre of
' created wetlands can be used to reduce the impacts of a \I/21-acre loss of wetlands to the
minimum impact level in order to meet the minimal impact requirement associated with NWPs.
' e. To be practicable, the mitigation must be available and capable of being done
considering costs, existing technology, and logistics in light of the overall project purposes. :-
Examples of mitigation that maybe appropriate and practicable include, but are not limited to:
' reducing the size of the project; establishing and maintaining wetland or upland vegetated buffers
to protect open waters such as streams; and replacing losses of aquatic resource functions and
values by creating, restoring, enhancing,"or preserving similar functions and values, preferably in
' the same watershed.
f. Compensatory mitigation plans for projects in or near streams or other open waters
will normally include a requirement for the establishment, maintenance; and legal protection
12

• (e.g., easements, deed restrictions) of vegetated buffers ~to open waters. In many cases, vegetated.
' buffers will be the only.compensatory mitigation required..Vegetated buffers should consist of
native species. The width of the vegetated buffers required will address documented water
quality or aquatic habitat loss concerns. Normally, the vegetated buffer .will be 25 to 50 feet wide
on each side of the stream, but the District Engineers. may require slightly: wider vegetated buffers
' to address .documented water quality or habitat loss concerns. Where both wetlands and open
waters exist on the project site, the Corps will determine the appropriate compensatory mitigation
(e.g., stream buffers or wetlands compensation} based on what is best for the aquatic
environment or, a .watershed basis. In cases where vegetated buffers aze determined to be the
most appropriate form of compensatory mitigation, the District Engineer may waive or reduce
the requirement to provide wetland compensatory mitigation for wetland impacts.
g, compensatory mitigation proposals submitted with the ",notification" maybe either
'.; conceptual or detailed. If conceptual plans are approved under the verification, .then the Corps
will condition the verification to require detailed plans be submitted and approved by the Corps
prior to construction of the authorized activity in waters of the iJS.
.h._Permittees may propose the use of mitigation banks, in-lieu fee arrangements or .
separate activity-specific compensatory mitigation. In all cases that require.compensatory
' mitigation, the mitigation provisions ,will specify the party zesponsible for accomplishing and/or
complying with the mitigation plan...
20. Spawning Areas. Activities, including structures and work in navigable. waters of the
' US or discharges of dredged or fill material; in spawning areas during spawning seasons must be
avoided to the. maximum extent practicable. Activities that result. in the physical destruction (e.g.,
' excavate, fill, or smother downstream by substantial turbidity} of an important spawning azea are
not authorized.....
21. Management of Water Flows. To the maximum extent practicable, the'activity must be.
' designed to maintain preconstruction downstream flow conditions (e.g., location, capacity, and
flow rates).. Furthermore; the .activity must not permanently restrict or impede the passage of
' normal or expected high flows (unless the primary purpose of the fill is to impound waters),and •
the structure or discharge of dredged or fill material must withstand- expected high flows. The
activity must, to the,maximum extent practicable, provide for retaining excess flows from the
' site, provide for maintaining surface flow rates from the site similar. to preconstruction
conditions, and.provide for not increasing water flows from the project site, relocating water; or
redirecting water flow beyond preconstruction conditions. Stream channelizing will be reduced to
the minimal amount necessary, and the activity must, to the maximum extent practicable, reduce
adverse effects such as flooding or erosion downstream and upstream of the project site, unless
the activity is part of a larger. system designed to manage water flows. Inmost cases, it ,will not.
' be a requirement to.conduct detailed studies and monitoring of water flow.
This condition is only applicable to projects that have the potential to affect waterflows.
While appropriate measures must be taken, it is not necessary to conduct detailed studies to
13

1
1

identify such measures or require monitoring to ensure their.effechveness.•Normally, the Cozps
will defer to state and local authorities regarding management of water flow.
22. Adverse Effects From Impoundments.~If the activity creates an impoundment of water,•
adverse effects to the aquatic system due to the acceleration of the passage of water, and/or the
restricting its~flow shall be minimized to the maximum extent practicable. This includes
~stnxctures and work in navigable waters of the US, or discharges of dredged or fill material:
23. Waterfowl Breeding Areas. Activities, including structures and work in navigable
waters of the US or discharges of dredged or fill material, into breeding areas for migratory
waterfowl must be avoided to the maximum extent practicable.
24. Removal of Temporary Fills. -Any temporary fi lls must be removed in their entirety and
the affected areas returned to their preexisting •elevation.
25. Designated Critical Resource Waters: Critical:resource_waters include; - : ~ `,
NOAA-designated marine sanctuaries, National Estuarine Research~Resexves, National Wild and
Scenic Rivers, critical habitat for Federallylisted threatened and endangered species; coral reefs,
state natuzal heritage sites, and outstanding national resource waters ~or other waters officially
designated by a state as having particular environmental or ecological significance and identified
by the District Engineer after notice and opportunity for public comment. The DistrictEngineer
may also designate additional critical resource waters after notice and opportunity for comment.
a. Except as noted below, discharges of dredged or fill material into waters of the US
are not authorized by NWPs ?, 12, 14, 16; 17, 21; 29, 31, 35, 39, 40, 42, 43, and 44 for any
activity within, or directly affecting, .critical resource waters, including wetlands adjacent to such
waters. Discharges of dredged or fill materials into waters of the US maybe authorLZed by the
above NWPs in National Wild and Scenic Rivers if the activity complies with General Condition
7. Further, such discharges may be authorized in designated critical habitat for Federally listed
threatened or endangered species if the activity complies with General Condition 11 and the
USFWS or the NMFS has- concurred in a determination of compliance with this condition:
b.. For NWPs 3; 8, 10,13, 15, 1 S, 19, 22, 23, 25, 27; 28, 30, 33, 34, 36, 37, and 38,
notification is required in accordance with General Condition 13, for any activity proposed in the
designated critical resource waters including wetlands adjacent to those waters.: The District
Engineer may authorize activities under these NWPs only after it is determined that the impacts;
to the critical resource waters will be no more than minimal.
26. Fills Within 100-Year Floodplains. For purposes of this General Condition, 100-year
floodplains will be identified through the existing Federal Emergency Managexnent Agency's
(FEMA) Flood Insurance Rate Maps or FEMA-approved local floodplain maps.
a. Discharges in Floodplain; Below Headwaters. Discharges of dredged or fill material
into waters of the US within the mapped 100year floodplain; below headwaters (i.e. five cfs},
14
1

resulting in permanent above-grade fills, are not authorized by NWPs 39, 40, 42, 43, and 44.
b. Discharges in Floodway; Above Headwaters. Discharges of dredged or fill material
into waters of the US. within the FEMA or Locally mapped floodway, resulting in permanent
above-grade fills, are not authorized by NWPs 39,.40, 42, and 44.
c. The permittee must comply with any applicable FEMA-approved state or local
floodplain management requirements.
27. Construction Period. For activities that have not been verified by the Corps and the
' project was commenced or under contract to commence by the expiration date of the NWP (or
modification or revocation date), the work must be completed within 12-months after such, date
(including any modification that affects the project).
For activities that have been verified and the project was commenced or under contract. to .
commence within the verification period, the work must be completed by the date, determined by
the Corps.., ~>
,;::;
-For projects that have been verified by the Corps, an extension of a Corps approved
completion date maybe requested. This request must be submitted at least one month before the
previously approved completion date.
TION
FURTHER INFORMA

' 1. ~~Distxict. Engineers have authority to determine if an activity complies with the terms and ~ .
conditions of a NWP.

' Z. NWPs do not obviate the need to obtain other Federal, State, or Local permits, approvals, or
authorizations required by Law.
' 3. NWPs do not grant any property rights or exclusive privileges.
' 4. NWPs do not authorize any injury to the property or rights of others.
' oject
al
d
d F
.
pr
er
e
S. NWPs do not authorize interference with any existing or propose
FI
I
TIONS
N
DE
' -Best Management Practices BMPs}: BMPs are policies, practices, procedures, or structures
implemented to mitigate the adverse environmental effects on surface water quality resulting
from development. BMPs are categorized as structural or nonstructural.. A BMP policy may
affect the limits on a development_ ~ •
15.

' Compensatorv Miti a~ tion: For purposes of Section 10/404, compensatory mitigation is the
restoration,~creation, enhancement,-or in exceptional circumstances; preservation of wetlands
and/or other aquatic Tesources-for the purpose of`coinpensating-for unavoidable adverse impacts,
which remain, after all appropriate-and practicable avoidance and minimization has been
. achieved.
Creation: The establishment of a wetland or other aquatic resource where one did not formerly
eX2St.

1

1

Enhancement: Activities conducted in existing wetlands or other aquatic resources that increase
one or more aquatic functions.
Ephemeral Stream: An ephemeral stream has flowing water only during and for a short duratiozi
after; precipitation events in a typical year.-:-Ephemeral stream beds are located above the water
table year-round. Groundwater is not a source of water for the: stream.. Runnoff from rainfall is
the primary source of water for stream flow_
Farm Tract: A unit of contiguous land-under one ownership that is operated ~as a farm or part of
a farm l
Flood Fringe: That portion of the 100-year floodplain outside of the floodway (often referred to
as "floodway fringe"}.
Floodway: The area regulated by Federal, state, or local xequirements to provide for the
discharge of the base flood so the cumulative increase in water surface elevation is no more than
a designated amount (not to exceed one foot as set by the National Flood Insuratzce Program}
within the 100-yeaz floodplain.
Independent Utility: A test to determine what constitutes a single and complete project in the.
Corps regulatory program. A project is considered to have independent utility if it would be
constructed absent the construction of other projects in the project area. Portions of a multi-
phase project that depend upon other phases of the project do not have independent utility.
Phases of a project that would be constructed even if the-other phases were not built can be
considered as separate single and complete projects with independent utility.
Intermittent Stream: An intermittent stream has flowing water during certain times of the year,
' when groundwater provides water for stream flow.. During dry periods, intermittent streams may
not have flowing water. Runoff from rainfall is a supplemental source of water for stream flow.
Loss of waters of the US: Waters of the US that include the filled area and other waters that are
permanently adversely affected by flooding, excavation, or drainage because of the regulated
activity. Permanent adverse effects include permanent above-grade, at-grade, or below-grade
fills that change an aquatic area to dry land, increase the bottom elevation of a waterbody, or
16

change the use of a waterbody.. The acreage of loss of .waters of the US is the threshold
measurement of the impact to existing waters for determ~n~ng whether a project may qualify.for a
' NWP; it is not a net threshold that~is calculated after considering compensatory mitigation that
maybe used to offset losses of aquatic functions and values. The loss of stream bed includes the
.linear feet of stream bed that is filed or excavated.. Waters of the. US temporarily filled, flooded,
excavated, or drained, but restored to preeonstructioneontours and elevations after construction,
are not included in the measurement of loss of waters of the US. Impacts to ephemeral waters
are only not included in the acreage or linear foot measurements of loss of waters of the US or
loss of stream bed, for the purpose of determining compliance with the threshold limits of the :
NWPs.
has standin
ti
i
it
f
g
a
on
prec
p
Non-tidal Wetland.• An area that, during a year with normal patterns o
or flowing water for sufficient duration to establish an ordinary high water mark. Aquatic
' vegetation within the area of standing or flowing water is either non-emergent, sparse, or absent.
Vegetated shallows are considered: to be open waters. The term "open water" includes rivers,.
streams, lakes; and ponds. For the purposes of the NWPs, this term does not include ephemeral
waters.
.
Perennial Stream: A perennial stream has flowing water year-round during a typical year. The
' water table is located above the stream bed for the most of the year. Groundwater is the primary
source of water for stream flow. Runoff from rainfall is a supplemental source of water for
stream flow.
' US
f th
t
l i
ri
e
,
ers o
nto wa
a
Permanent Above- ade Fill: _ A discharge of dredged or fill mate
including wetlands, that results in a substantial increase in ground elevation and permanently
converts part or all of the waterbody to dry land. Structural fills authorized by NWPs 3, 25, 3b,
etc. are not included. .
Preservation:. The protection of ecologically important wetlands or other aquatic resources in
perpetuity through the implementation of appropriate legal and physical mechanisms.
Preservation may include protection of upland areas adjacent to wetlands as necessary to ensure
protecction and/or enhancem. ent of the overall aquatic ecosystem.
Restoration: Re-establishment of wetland and/or other aquatic resource characteristics and
function(s) at a site where they have ceased to exist, or exist in a substantially degraded state.
Riffle and Pool Complex:. Riffle and pool complexes are special aquatic sites under the 404(b)(1)
Guidelines. Riffle and pool complexes sometimes characterize steep gradient sections of
streams. -Such stream sections are recognizable by their hydraulic characteristics. The rapid
movement of water over a course substrate in riffles results in a rough flow, a turbulent surface
and high dissolved oxygen levels in the water. Pools are deeper areas associated with riffles. A
slower stream velocity, a streaming flow, a smooth surface, and a finer substrate characterize
pools.
17

1
1

1
Single and ComFlete'Project:.=The term "single and complete project" is defined at 33 CFR
~330.2(i) as the total project proposed or accomplished by one owner/developer.or.partnership or
other association of owners/developers .(see defmition of independent utility). For linear
projects, the "single-and complete project" (i.e., a single and complete crossing) will apply to
each crossing of a separate water of the US (i.e., a single waterbody} at that location. An
exception.is for linear projects crossing a single waterbody several times at.separate and distant
locations;-each crossing is considered a single and complete project. However; individual
channels in a braided stream or river, or individual arms of a large, irregularly shaped wetland or
lake; etc., are not separate waterbodies.
Stormwater Management: Stormwater management is the mechanism for controlling stormwater
runoff for the purposes of reducing'downstream erosion,. water quality degradation, and flooding
and mitigating the adverse effects of changes inland use on the aquatic.environment.
Stormwater Management Facilities: $tormwater-management~facilities.arethose facilities,
including brit not limited to, stormwater retention and. detention .ponds and.BMPs; which retain
water for a period of time to control runoff and/or improve the quality (i.e., by reducing the
concentration of nutrients, sediments, hazardous substances-and other.pollutants) of stormwater
runoff.
Stream Channelization: The manipulation of a stream channel to increase the rate of water flow
through the stream channel. Manipulation may include deepening, widening, straightening,
armoring, or other activities that change the stream cross-section or other aspects of stream.
channel geometry to increase the rate of water flow through the stream channel. A channelized
stream remains a water of the US; despite the modifications to increase the rate of water flow:
Tidal YYetland.• A tidal wetland is a wetland (i.e., water of the US) that is inundated by tidal
waters. The defmitions of a wetland and tidal waters can be found at 33 CFR 328.3(b) and 33
CFR 328.3(f), respectively. Tidal-waters rise and fall in a predictable and measurable rhythm or ,
cycle due to the gravitational pulls of the moon and sun. Tidal waters end where the rise and fall
of the water surface can no longer be practically measured in a predictable rhythm due to
masking by other waters, wind, or other effects..Tidal wetlands are located channelward of the
high tide line (i.e., spring high tide line) and are inundated by tidal waters two times per lunar
month; .during spring high tides.
Vegetated Buffer: A vegetated upland or wetland area next to rivers, streams, lakes, or other'
open waters, which separates ahe open water from developed areas, including agricultural land.
Vegetated buffers provide a variety of aquatic habitat functions and values (e.g., aquatic habitat
for fish and other aquatic organisms, moderation of water temperature changes, and detritus for
aquatic food webs) and help improve or maintain local water quality. A vegetated buffer can be
established by maintaining an existing vegetated area or planting native trees, -shrubs, and
herbaceous plants on land next to openwaters. Mowed lawns are not considered vegetated
buffers because they provide little or no aquatic habitat functions and values. The establishment
and maintenance of vegetated buffers I a method of compensatory mitigation that can be used in
18
1

conjunction with the restoration, creation, enhancement or preservation of aquatic habitats to
1 .ensure that activities authorized by NwP s result in minimal adverse effects to the aquatic -
environinent. -(See General Condition 19.)
Vegetated Shallows: Vegetated,shallows are .special aquatic sites under the 404(b)(1}Guidelines.
They are azeas that aze permanently inundated and under normal circumstances have rooted .
aquatic vegetation, such as seagrasses in marine and estuarine systems and a variety of vascular
rooted plants in freshwater systems.
Waterbo A waterbody is any area that in a normal year has water flowing or standing above
ground to the extent that evidence of an ordinary high water mazk is established. Wetlands
contiguous to the waterbody are considered part of the waterbody.
FINAL REGIONAL CONDITIONS FOR NATIONWIDE PERMITS IN THE
. ~:: ~.; ;. ; WILMINGTON DISTRICT
' 1. Waters Excluded from NWP or Subject to Additional Notification Requirements:
a. The Corps identified waters that will be excluded from use of this NWP. These. waters
are:
1. Discharges into Waters of the United States designated by either the North Carolina. .
Division of Marine Fisheries (NCDMF) or the North Carolina Wildlife Resources Commission
(NCWRC) as anadromous fish spawning area are prohibited during the period between February
' 15 and June 30, without prior written approval from NCDMF or NCWRC and the.Corps.
2. Discharges Into Waters of the United States designated as sturgeon spawning areas
' are prohibited during the period between February 1 and June 30, without prior written approval
from the National Marine Fisheries Service (NIVIFS}.
b. The Corps identified waters that will be subject,to additional notification requirements for
activities authorized by this NWP. These waters are:
1. Prior to the use of any NWP.in any, of the following North Carolina designated
waters, applicants must comply with Nationwide Permit. General Condition .13: ~ In addition; the
applicant must furnish.a written statement of compliance with ail of the conditions of the
applicable Nationwide Permit. -The North Cazolina designated waters that require additional:
notification requirements are "Outstanding Resource Waters" (ORW) and "High Quality Waters"
(HQW) (as defined by the North Cazolina Division of Water Quality), or "Inland Primary
Nursery Areas" (IPNA) (as defined by the North Carolina Wildlife Resources Commission), or
contiguous wetlands (as defined by the North Carolina Division of Water Quality), or "Primary
Nursery Areas" {PNA) (as defined by the North Carolina Division of Marine Fisheries).

19

2. Applicants for any NWP in a designated "Area of Environmental Concern" (AEC) in
the twenty (20) coastal counties of Eastern North Carolina~covered bythe North Carolina Coastal
Area Management Act (LAMA), must also obtain the required CAMA permit. ~ Construction '
activities may not commence until a copy of the approved CAMA permit is furnished to the
appropriate Wilmington District Regulatory Field Office (Wilmington Field Office - P.O:Box
1890,~Wihnington, NC 28402 or Washington Field Office - P.O: Box 1000, Washington, NC
27889) .for authorization to begin work.
3. Prior to the use of any NWP on a Barrier Island of North Carolina, applicants must
comply with Nationwide Fermit General Condition 13. In addition, the applicant shall furnish a
' written "statement of compliance .with all of the conditions listed of the applicable Nationwide
Permit.
' 4. Prior to the use of any NWP in a "Mountain or Piedmont Bog" of North Carolina,
applicants shall comply with Nationwide Permit General Condition I3: ~In.addition; .the applicant
shall furnish a written statement of compliance with all of the,conditions listed of the applicable
NWP
Note: The following wetland comriaunity types identified .in the N.C. Natural Heritage Program
document, "Classification of Natural communities of North Carolina (Michael P. Schafale and
Alan S. Weakley, 1990), are subject to this regional condition.
Mountain Bois Piedmont Bois
' Swamp Forest-Bog Complex Upland Depression Swamp Forest
Swamp Forest-Bog Complex (Spruce Subtype)
Southern Appalachian Bog (Northern Subtype)
Southern Appalachian Bog (Southern Subtype}
Southern Appalachian Fen
5. Prior to the use of any NWP in Mountain. Trout Waters within twenty-five, (25)
designated counties of North Carolina,. applicants shall comply with Nationwide General
Condition •13. In addition, the applicant~shall furnish a written statement'of compliance with all
of the conditions listed of the applicable NWP. Notification will include a letter of comments
and recommendations from the North Carolina Wildlife Resources Commission (NCWRC), the
.location of work,- a delineation of wetlands, a discussion of alternatives _to working in the
Mountain TroutWaters; why°other alternatives were not selected, and a plan to provide
compensatory mitigation for all unavoidable adverse impacts to the Mountain Trout Waters. To
facilitate coordination with the. NCWRG, the.proponent may provide a copy of the notification to
' the NCWRC concurrent with the notification to the District Engineer. The NCWRC will
respond -both to the proponent. and directly to the Corps of Engineers:
ie
s are:
The twenty-five (25) designated count
Allegheny Ashe Avery Yancey -
Buncombe Burke Caldwell Wilkes
20

Cherokee ~ Clay .
Haywood ::- :Henderson
Macon Madison
Mitchell Polk
Transylvania ~ :Watauga
Graham Swain
Jackson - Surry
McDowell Stokes
Rutherford
. . 6. Applicants shall notify the NCDENR Shellfish Sanitation Section prior to dredging in
or removing sediment from an area closed to shell fishing where the efIluent may be released to
an area open for shell f skiing or swimming in order to avoid contamination of the disposal area
and allow a temporary shellfish closure to be made. Any disposal of sand to the beach. should
occur between November 1 and Apri130 when recreational usage is low. Only clean sand should
be used and no dredged sand from closed shell fishing areas. If beach disposal was to occur at
times other than stated above or if sand from a closed shell fishing area is to be used, a swim
advisory shall be posted and a press release shall be made. ,NCDENR Shellfish Sanitation
Section must;be notified before commencing this activity.
2. List of Final Corps Regional Modifications and Conditions for All Nationwide Permi#s
a. Individual or multiple NWPs may not be used far activities that result in the cumulative
loss or degradation of greater than 300 total lineaz feet of perennial streambed or intermittent
streambed that exhibits important aquatic function(s).
' b. Prior to the use of any NWP {except 13, 27, and 39} for any activity that has more than a
total of 150 total linear feet of perennial streambed impacts or intermittent streambed impacts.{if
'the intermittent stream has important aquatic function}, the applicant must comply with
' Nationwide Permit General Condition 13. In addition, the applicant shall famish a written
statement of compliance with all of the conditions listed of the applicable NWP. Compensatory
mitigation-is typically required for any impact that requires such notification: jNote: The Corps
uses the Intermittent Channel Evaluation Form, located with Permit Information on the .-
Regulatory Program Web Site, to aid in the determination.oflhe intermittent channel stream
status. Also, NWPs 13; 27 and 39 have specific reporting requirements.)
' c. For all Nationwide Permits which allow .the use of concrete as a building material,
measures will betaken to-prevent live or fresh concrete; .including bags of uncured concrete,
from coming into contact with waters of the state until the concrete has hardened.
d. For all Nationwide Permits that allow for the use of riprap material for bank stabilization,
filter cloth must be placed underneath the riprap as an additional requirement of its use in North
Carolina waters.
e. For all NWPs that involve the construction of culverts, measures will be included in the ~ .
construction that will promote the safe passage offish and other aquatic organisms.
- All culverts in the 20 CAMA coastal counties must be buried to a depth of one foot below the-
Raai3way
Appmack Ffll Baxek£ull'
Culvert busied
helaw stzeasnbed
to appmpxiate
Stseasn depth
Sottosn

bed of the stream or wetland. For all .culvert construction.activities, the dimension, pattern, and
' profile of the stream, (above -and below a pipe or culvert), should not be .modified by widening
the stream channel or by reducing the depth of the stream. Culvert inverts will be buried at least
one foot below the bed of the stream for culverts greaterthan 48 inches in diameter. For.culverts
' 48 inches in diameter or smaller, culverts must be buried below the bed:of the.stream to a depth
. ~ equal to or greater than 20 percent of the diameter of the culvert. Bottomless arch culverts will
.satisfy this condition. A waiver from the depth specifications in this Regional-Condition maybe
' requested in writing.: The waiver will only be issued if it can be demonstrated that the impacts of
complying with this Regional Condition would result in more adverse impacts to the aquatic
environment.
3. Additional Regional Conditions Applicable to this Nationwide Permit
' a. Discharges in wetlands and in perennial streams for stormwater management facilities are
prohibited under this NWP.
' b. Single-family zecreational facilities axe not authorized under NWP 39.
Recreational facilities, if they axe incorporated into and serving an entire residential, commercial,
or institufional development, can be authorized by this NWP.
t ~ ~ .
NORTH CAROLINA DIVISION OF WATER QUALITY
GENERAL' CERTIFICATION CONDITIONS ~ •
GS3362
' 1. Enumerating and Reporting of Impacts:
a: Streams -Impacts to streams as determined by the Division of Water Quality shall he
' measured as length of the centerline of the. normal flow channel. Permanent and%r temporary
stream impacts shall be enumerated on the entire project for all impacts regardless of which 404
Nationwide Permits are used. Stream relocations and streambed -and/or bank hardening are
' ~ considered to be permanent stream impacts. Any activity that results in a loss of use of stream
functions-including but not limited to filling, relocating, flooding, excavation; dredging and
complete shading shall be considered stream impacts. Enumeration of impacts to streams shall
' include streams enclosed by.bottomless culverts, bottomless arches or other spanning structures
when a 404 Permit is used anywhere in a pro}ect unless the entire structure (including
construction impacts) spans the entire bed and both banks of the strew, is only used for a road,
driveway: or path crossing, and is not mitered to follow the stream pattern. Impacts for dam
footprints and flooding will count toward the threshold for stream impacts, but flooding upstream
of the dam will not (as long as no filling, excavation, relocation or other modification of the
' existing stream dimension, pattern or profile occurs) count towards mitigation.
b. Wetlands -Impacts to wetlands as determined by the Division of Water Quality shall be
measured as area. Permanent and/or temporary wetland impacts shall be enumerated on the entire
22
..

project.for all impacts regazdless of which 404 Nationwide. Permits are.used. Any actlvlty that
results in a loss. of use of wetland functions including but nat limited to filling, excavating,
draining, and flooding shall be considered wetland impacts..Enumeration of impacts to wetlands
shall include.activities that change. the hydrology of a wetland when a 404 Permit is used
' anywhere in a project..
c. Lakes and Ponds -Impacts to waters other than streams and wetlands as determined by
the Division of .Water Quality shall be measured as area. Permanent and/or temporary water
impacts shall be enumerated on the entire project for all impacts proposed regardless of Which .
404 Nationwide Permits, are used. Any activity that results in a loss of use of aquatic functions
' including but not .limited to filling and dredging shall be considered waters impacts. Application
Thresholds -Stream, wetland and water impacts that exceed any of the thresholds below require
a complete application and written concurrence to use this Certification:
' Total.stream im acts of eater ore ual to 150 cumulative feet of stream length for the.
P ~' q
entire project require written notification to and approval by the Division of Water Quality, .
and/or ~;..:_.;
Impacts.to waters of equal to or greater than Ili of an acre require written notification to
' and approval by the Division of Water Quality, and/or Wetland impacts of greater or equal to 1/3
of an acre east of I-95 and 1/10 of an acre west of I-95 require written notification to and
approval by the Division of. Water Quality except as specified below: Any. impacts to wetlands
' adjacent to waters. designated as ORW, SA, WS-I; WS-II or Trout or are designated as a North
Carolina or National Wild and Scenic River and wetlands- classified as SWL and/or UWL as well
as wetlands described in.15A NCAC 2H .0506 (e) require a complete application and written
' concurrence from the Division of Water Quality to use this Certification. These thresholds apply
for the entire project regardless of the number of Nationwide Permits applicable to the
Certification that are issued by the USACE for the project;'
' Written notification to DW is re uired for all applications that propose to .use .
Q. q
Nationwide Permit 18. This notification requirement will be satisfied by providing two (2) copies
of the PCN form to DWQ at the same time that the PCN farm is sent to the US Army Corps of
Engineers. A formal application and fee is not required unless DWQ decides that an Individual
Certification will be.required for the project. In-this case, .the applicant will be notified in writing
' from DWQ within 30 days of the receipt of the written notification. . .
Proposed fill oz substantial. modification of any amount of wetlands classified in
accordance with. Z SA NCAC 2B .0101(e)(~ as Unique Wetlands (UWL) shall require written
concurrence from the Division of Water Quality;
' 2. Impacts to any stream length in the Neuse, Tar-Pamlico or Randleman River Basins (or any
other major river basins with Riparian Area Protection Rules [Buffer Rules] in effect at the time :
of application) requires written concurrence for this Certification from DWQ in accordance with
15A NCAC 2B.0200. Activities sted as "exempt" from these rules do not need to apply. for
23

written concurrence under this Certification. New development activities located in the protected
' - 50-foot wide riparian areas (whether jurisdictional wetlands: or not) within the Neuse and Tar-
Pamlico River Basins shall°be limited to `5uses" identified within and constructed in accordance
with 15A.NCAC 2B :0200. All new development shall -be located, designed,~constructed, and
maintained to have minimal disturbance to -protect water quality to the maximum extent
- practicable through the use of best management practices;
3. Additional site-specific stormwater management requirements maybe added to this
Certification at DWQ`s discretion on a case-by-case basis for projects that have ar are anticipated
to have impervious cover of greater than 30 percent. Site=specific stormwater management shall
be designed to remove 85% TSS according to the latest version of DWQ's Stormwater Best
Management Practices -manual "at a minimum. Additionally, in watersheds within` one mile and
draining to 303{d) listed waters; as well as watersheds that are. classified as nutrient sensitive
' waters (NSW), water supply waters (WS), trout waters (Tr), high .quality waters (HQW), and
outstanding resource waters (ORW), the Division shall require that extended detention wetlands,
bio-retention areas, and ponds followed by forested filter strips (designed according to atest .
' version of the NC DENR Stormwater Best Management Practices Manual) be constructed as part
of the stormwater management plan when asite-specific stormwater management plan is .
required. For streams classified as Water Supply, High Quality Waters and Outstanding-
' Resource Waters, post-construction, on-site stormwater management shall be required as
appropriate and as outlined in 15A NCAC 2B .0104(m) and 2H .1000 to .1007, respectively, in
addition to that required' in this General Certification. Alternative designs may' be requested by
' the applicant and will be reviewed on a case-by-case basis by the Division of Water Quality:
Approval of stormwater management plans by the Division of Water Quality's'otherexlsting
state stormwater programs including appropriate local programs are sufficient to satisfy #his
' Condition as Long as the stormwater management plans meet or exceed the `design requirements
specified in this condition. This condition applies unless more stringent requirements 'are in effect
from other state water quality programs.
Unless s ecified otherwise in the approval letter, the final, written stormwater management
P
plan shalTbe approved in writing by the Division of Water Quality's Wetlands Umt before the
' impacts specified in this Certification occur:
The facilities mustbe designed:to treat the runoff from-the entire project, unless otherwise
' explicitly approved by the Division of Water Quality. -
Also, before any permanent building or other structure is occupied at the subject site, the
' facilities (as approved by the Wetlands Unit) shall be constructed and operational, and the
stormwater management plan (as approved by the Wetlands Unit) sliall be implemented.
' 'The structural storx~iwater practices as approved by the Wetlands -Unit as well as drainage
patterns must be maintained in perpetuity. ~ .
' No changes to the structural stormwater practices shall be made without written authorization
24 .

from the Division of Water Quality.
4. -Compensatory stream mitigation shall be required at a 1:1 ratio for all perennial and
intermittent stream impacts equal to or exceeding 150 feet and that require application to. DWQ
in watersheds ciassif~ed as ORW, HQW, Tr, WS-I and WS-II;
5. In accordance with North Carolina General Statute Section 143-215.3D(e), any application for
a 401 Water Quality Certification must include the appropriate fee. If a project also requires a
CAMA Permit, one payment to both agencies shall be submitted and will be the higher of the
two fees; .
6. In accordance with 1 SA NCAC 2H .0506 (h) compensatory mitigation maybe required for
impacts to 150. linear feet or more of streams and/or one acre or more of wetlands for an entire
project.. For linear public transportation projects, impacts equal to or exceeding 150 feet per
stream may~require mitigation. In addition, buffer mitigation may be required for any project with
Riparian Area Protection Rules (Buffer Rules) in effect at the time of application for buffer
impacts resulting from activities classified as "allowable with mitigation" within the "Table of
Uses" section:of°the Buffer Rules or require a.variance under the Buffex Rules. A determinatiozi .
of buffer, wetland and stream mitigation.requirements shall be made for any.Certification for this
Nationwide Permit. The most current design.and monitoring protocols from DWQ shall be
followed and written plans submitted for DWQ approval as required in those protocols. When: .
compensatory mitigation is required fora project, the mitigation plans must be approved by
DWQ,in writing:before the impacts approved by the Certification occur, unless otherwise .
specified in the approval letter. The mitigation.plan must be implemented and/or constructed
before any permanent building or structure on site is occupied. In the case of public road prajects,
the mitigation plan must be implemented before the road is opened to the traveling public. Please
note that if a stream relocation is conducted as a stream restoration as defined in.The Internal
Technical Guide for Stream Work in North Carolina, Apri12001, the restored length can be used
as compensatory mitigation for the impacts resulting from the relocation;
7. For any project involving re-alignment of streams,.a stream relocation plan must be included
with the 401 application for written DWQ approval. Relocated stream designs should include the
same dimensions, patterns and profiles as the existing channel (or a stable reference reach if the
existing channel is -unstable}, to the maximum extent practical. The new channel should be
constructed in the dry and water shall not be turned into the new channel until the banks are
stabilized. Vegetation used for bank stabilization shall be limited to native woody species, and
should. include establishment of a 30 foot wide wooded and an adjacent 20 foot wide vegetated
buffer on both sides of the relocated channel to the maximum exten# practical. A transitional
phase incorporating coir fiber and seedling establishment is allowable. Also, rip-rap, A-Jacks,
concrete, gabions or other hazd structures maybe allowed if it is necessary to maintaixt the
physical integrity of the stream, but the applicant must provide written justification and any
calculations used to determine the extent of rip-rap coverage requested.,If suitable stream
mitigation is not practical on-site, then stream. impact will need to be mitigated elsewhere. Please.
note that if a stream. relocation is conducted as a stream restoration as defined in The Internal
25

1

Technical Guide for Stream Work in North Carolina, Apri12001;'the restored length can be used
as compensatory mitigation for the impacts resulting from the relocation; .
8:. Placement of culverts and -other structures in waters; streams, and wetlands must be placed
below the elevation of the streambed to allow-low flow passage of water and aquatic life' unless it
can be shown to DWQ that providing passage would be impractical. Design and placement of
culverts including open bottom or bottomless arch culverts and other structures including
' temporary.erosion control measures shall not be conducted in a manner that may resulf in
aggradation, degradation or significant changes in hydrology of wetlands or stream beds or
banks, adjacent to or upstream and down stream of the above structures. The applicant is required
' to provide evidence that the equilibrium shall be maintained if requested to do so in writing by
DWQ. Additionally, when roadways, causeways or other fill projects are constructed across
FEMA-designated floodways or wetlands, openings such as culverts or bridges must be provided
' to maintain the natural hydrology of the system as -well as prevent constriction of the floodway
that may result in aegradation; degradation oraignificarit-changes in:hydrology of streams or
wetlands;
' tli
d
s
e
d th
e
l
-
ne
e ou
e
o
or exc
qua
which
9. That a ro riate sediment and erosion control practices
PP P
in the most recent version of the ~"North Carolina Sediment and Erosion Control Plamzung and
' Design "Manual" or the "North Carolina Surface Mining Manual" whichever is more'appropriate
(available from the Division of Land Resources (DLR) in the DENR Regional or Central Offices)
shall be in full compliance with all specifications governing the proper design; installation and
' operation and maintenance of such.Best Management Practices in order to assure compliance
with the appropriate turbidity water quality standard;
' 10. All sediment and erosion control measures placed in wetlands and waters shall be removed
and the original grade restored within two months after the Division of Land Resources has
released the project;
thi
d
d
er
s
un
11. That additional site-specific conditions maybe added to projects propose
Certification in order to ensure compliance with all applicable water quality and effluent
' standards;
12. Measures shall be..taken to prevent live or fresh concrete from coming into contact with
' waters of the state until the concrete: has hardened;
13. If an environmental document is required; this Certification is not valid until a Finding of No
Significant Impact (FONSI} or Record of Decision (ROD) is issued by the -State Clearinghouse;
14. If this Certification is used to access building sites, all lots owned by the applican# must be
' buildable without additional fill beyond that explicitly allowed under other General
Certifications. The applicant is required to provide evidence that the lots are buildable without
requiring additional impacts to wetlands, waters or buffers if required to do so in writing by
' DWQ. For road construction purposes, this Certif cation shall only be utilized from natural high
26

' ground to natural high ground;
15. Deed notifications or similar mechanisms shall be placed on all lots with remaining
jurisdictional wetlands and waters or areas within 50 feet of all streams .and ponds. These
mechanisms shall be put in place within 30 days of the date of issuance of the 401 Certification
' letter or the issuance of the 404 Permit (whichever is later). A sample deed notification format
can be downloaded from the 401/Wetlands Unit web site at http://h2o.enr.state.nc.us/ncwetlands.
DWQ shall be sent copies of all deed restrictions applied to these lots;
' 16. When written concurrence is required, the applicant is required to use the most recent
version of the Certification of Completion form to notify DWQ when all work included in the
' 401 Certification has been completed; .
17. Concurrence.~from DWQ that.this Certification applies to an individual project shall expire
' three years from-:the date of the cover letter from DWQ or on the same day as the expiration date
of the corresponding Nationwide Permit 39, whichever is sooner.
' :NORTH CAROLINA DIVISION OF COASTAL MANAGEMENT
STATE CONSISTENCY
Consistent.

' Citations:
2002 Nationwide Permits -Federal Register Notice 15 Jan 2002
2002 Nationwide Permits Corrections -Federal Register Notice 13 Feb 2002
' 2002 Regional Conditions -Authorized 17 May 2002

1
27
1
1

NCDENR DIVISION OF WATER QUALITY LETTER

STORMWATER MANAGEMENT CALCULATIONS
' Wal-Mart -Raleigh SE (Sunnybrook)

1
NORTH CAROLINA DEPARTMENT OF
EAtVIRONMENT AND T~tATURAI_ RESOURCES
RALEIGH REGIOPiAI. OFFtGE
DMSION OF WATER QUALITY
November 16~9Q~`
i; ~~ r.
Ivlr. Todd Preuninger ~ ~ ,t '!~
S&EC,Inc. ' Nnlf 2 0 2iiifl „ ,
11010 Raven Ridge Road i- 1
Raleigh, NC 27614 t~'
Subject: Neese River Basin
Riparian Buffer Rules
NBRRO 00-285
Rock Quarry Rd / Sunnybrook Rd Project
Wake County
Dear Mr. Preuninger:
On November 13, 2000, I conducted a site visit of the feature involved in the above
referenced project. It was detemvned as a result of the site visit that the water channel
present on the property is subject to the Neese River Basin: Nutrient Sensitive Waters
Management Strategy; Protection and Maintenance of Existing Riparian Areas,
Administrative Code T15A:02]3.0233 (NCAC 0233). The subject water channel and the
approximate start of the neuse buffer are indicated on the attached map. The channel is an
unnamed tributary of Walnut Creek.
This office has assigned the reference number of NBRRO 00-285 to this project.
Thank you for your attention to this matter and if this Office can be of any assistance or if
you have any additional questions concerning this letter, please da not hesitate to contact
me at 571-4700 ext. 237.
Since ly,
les Brown
Environmental Specialist
cc: John Domcy, DWQ
~neusbuf.Iet~nbr00285. tet

MAILING AbDREJ<i: 1626 MAIL lERVIC[ GEHT[It~ RAL[IGH, NORTH CAROLINA 276!l-1626
LOCATION: 3600 CARR[TT DRIVfy lUIT[ 701. RALEtGH~ NC 2760!
PMONE 01 l-671.700 FAX lt!-6Tt-1716
AH EGUAL O-pKTUNITY I AFiIRNATIVE ACTON ErrLOYER - 50'K R[CYCLCO/IOX hOiT-CON/{JM[R rAr[II

-
6-;'
Q- ~. c

1
1
1
1
1
1
1
1
1
1
1
1
- ~ ..r. ~.t o....>dr., n.o.
1lO3D Rrnea RFM Jlee4 ~~ IIoRL (}~d~e Zr61~
. PLo~s: ~917t e+e-waD ~ ~19i ees9~
s - - • r :..a.~~ L / leeMet a OQ627¢
prDJoet -
li~J ~tWd /~eeedasstlr
~,illFrlMd.r7l4~WlaY ~ ~S
DL•wwr~~A/ar'~~~~M1~rD~ar~iMwR t~1
~A~~~r~~~t~d~~
A~~~e 1+e ~/~~~~Y~~~~~ Y11rlO~~
f e.... ~~wrM r^4 e~ ~ewM+epsw~ ~
,,,. r.. y r. a a . n. o• n ~+
. ... _.. r /v / ~~~

~~~
0
•Z
d
~ ~ 7
~~ ,
~ o j
~ a
~~ ~^ ~ ~
~~ ,~~ ~
~~ ~ ~ ,
~~~~~~ ~
r ` o
~ ~ ~~ ~~
~~s ~~ >
t ~~ ~~ ~~ a
~~
~' ~ ~
• ~ ~ ~ .
~~
~~• ~`_ ~
~ •
~ end dotaboees ar6 pubria hdormotion supplied
by variDUS gorennrrd ogenrJe.. iti autlwr aid/ar Ma ~ Y ~ ~ Figure-3
seNer of the software proyran ore b no way ~I ~• 11
re:por~slble er iabls for the information depicted
herein. Ir~fir;es eoncerning tM dots should be 0 135 270 i05 540 OGT 13, 2t0pp
Qirected ie the opp-op-iote government ageney. Scale in feDt

Wake County Sod Survey (shtet 7Q)
Obi77s t" = tuY' Figure 2 -Sop Sutvey ~Io Nciiity ~,
°'~ t~odc ~ Rd ~ suni+ybrootc rta ~ " "~~ Soil & Emrironmenfai Consu[EanEs, Inuc.
tty~.: Sc Raa~ph 11010 Raven K'idge Rd.^ F2eleigh, NC 27614
_ (918} 8465900 •(919} 84G-94fi7
Web Page: www.SandEC.com

Pro}xtt: Smote:
assns t~= ~ Figure t - USGS site
~~
~.: sc tarmroo pity
Rock Quarry Rd i Sunrrybroolc Rd
iRaiefgh
A~ ~~ ~a ~ g ~"'
USGS Tapograghicai Map (Raleigh East Quadrangle)
Soil. & Environmental Consaltan[~, Inc.
11010 Eleven Ridge Rd.• Raleigh, NC 27614
(919) 8465900 • [phone]
VYeb Page: www.Sarx~G,com

JDE MAP
STORMWATER MANAGEMENT CALCULATIONS
Wal-Mart -Raleigh SE (Sunnybrook)

rr rr r^ rr r r +r r~ +r rr r rr rr rr rr r r r r
k S7AJ-1%
\ ~'W~m \~ln $3F~~
, O 1
°\ O~ ~ 17~~ Z vm ~ ~~ S 1
A +~~'~ \ ~a y I
\ \ r P r
~q~ ~ ~
~ _ ° ~ ROCK QUARRY ROAD, ' ~ ~ ~' m
u,:~m ~, (N.C.S.R. 2542 VARIABLE PUBLIC RIGHT-OF-WAY) \
U Miaw ~ ~ 2
~orla C \, , ~'' ~ , F
-----~\p--- ci ,\
~10'h09
M .99~iS.9 ~N
•311-OY
I
'
A ~
O I
~®~
i
~i;s I
I
~~ 1
1
~ '
r I
~ ~
.I
~I
1
III
II
II
II
J
/ ~.
~~~z
$ ~,
~P~~~
z~rmn0
ex~
Q~r~~~
c `s ,,
m
Il
1

9 \
o
~ I
i Gov i
I i~41;1 oo'
~
I
I ~yf~p~'j5~
~Z l a~
I
~~ z~~~mm ~,
N ~~~
=~'F
1 ~ 1
~~
1 p 1
NSF I Z'"Z
~
I..eoom~
~°
1~m Z~y'
I~ C~mpl g
..;
_

~
u~ iy
~ ~
~~ a
' _ ~~~ ~
I (SO 0191 N
\
Jg~ ~o
~NI~OZ~
~~'~ '`
g~
,g y

~__ ~1_ -i.____.b.s___-_~__r =__ ___-__~__~__ __

r eornc Iwwx q b \ ~ , F~ \ \ , $ ry
__--__-____-~ CC tl
r _ .. _ _ ... -..P""~~°~'~iv/elx xrxam AL ~ ~, \! ~ A 1\ ~ ~ r~ S }p I r~ '\ ~ p fij O
1 \~q\ ~ ~ ~~ m ' ~ z g.. cpif
I r\ o, \ A ~\ ~wlo I ~~~ ~\ N1~~
O U' S ~j .TI
v
. ___~ .. .. .. ...~._:-....:.r.r.n~-.....r_.. : ~.~. - _ g
__ ._ N
~~ N °. ~ P
.... ...
Pow II - ~ \\ '•\ ~~\, ~ -/-,i.-" `~\ `
'^ \ ~ _~""
li =B~ \` \ ~ ~S
~\ ~° o `\
1 -ate , z CIQ~p
`\ ~ ~Z \ 8 U \, '~ ~
YZ `\ ~ _ ~
\ s~'~ \ ~ era
.\ ~~ ~-
\ `\~'
'~1 \ '\ ` .
\
I
U= ~
I I ~ 1 '~1 , \ ~ u ~ v / ,
I ~m ~ 1 '1 ~ ~ ~ /"
I ~D ~ v 11 \ /.
~ i N~ ~ 11 ~\ ~ 1 /.
-Np
~~ .o.
I I
I v~ ~~~ ~ ' ~ v o
~ I ~y~ ~~ 111 ~$g°~1 1 ~_ P ~O ~ ~ ~
. I Ci Rl• v 1 , . ~ 1 3~3~,~c~ p
S~ L~ ~ P H ~~ S6 y; Si LL s E~St ~~ ~n #~ ~~
-f.
ks ~~
;,k °P
a: f
a ~
~ YfC
ki 1S
~a E+y
sb n T
k~ l~a
aa
a '{:33
ay
x ub~
§~ ~P
sn °
b

.GG~~
~~
~ t p Fii
r~~'rx~,~ iL4
~~~ .;
~~
Y n
~ $~
U)
IpR ~
a ~ ~~
~~
I~
I ~
I
I R
I
I
I
I
I
I
I
I
I
I
I
I. i•
I
I
I
I
I
I
I
I
I
I
I
I
r-- _ _
I
1
I
I
I
~ ~~
I ~
I~~
I~€
I
I
I
I
I
I
I
I'
I
I
I
I.
I
t
I
~,
F ~dl IR~~ ~' i`'~ ~ v'P~ _ ~
.1 U (7 Z
`~~~ J$~
~ '~ 1 ~~ ~ i
1 1 \ _i'-
~1 ; ~, i
~1 I ~--
l ~ i
~ ~ ~1 n
g~~q{ ~ N
I ! ~ ~c ~~ 11 '1 1 C v -~
1' ` ~ ~~mr~ 1` 1 ~ , ~Z Pp~~o~
IS! ~ ~ ~ ~~ x ~ ~
,! h c ~.. 1 \ 1 ~~ wqo
a ~ 1 '( ,1 ~ ~,1` ~
~ i 1 ~\ I ~ n
~! ~ m 1 ,
r/iS1~ ~,~~~' ,, off' ~~_
' 'N 'el ~~ ' ,IgC ao9 ~ 1 ~ ~ ~ ~ S
E f ~ w"" 1 ~a" -I
!1 ~ ~lau1))sy ~' ~~~~~
. s ---F.ii:cSblp---'-~ ~ SI
\2', ~ ------ ~ 1 ,cye a ~
n a ~_
/ 1 fu ~~~~ ',-
J.s 1 ~
_._.
,_ _ _. .. __~__... ~-- -.._~.- - --a---- ~-
_. __ ;~--- _.~ 1 C ~M ~ d
i 1
~ ~'-
~ 93 ~i
%~ o s`°~Y ~ ~ ~ " B
a.,. gg
~ boo 8 >,v
//~~ o~ p ~~ ~ ~i~o ~ 9
~n 6
8~ r v ~., ~INp~ ~O~
~ ~ s'
°~u~ ~ ~ i~ ~~ ~~ a
i