20061379 Ver 1_Stormwater Info_20060925

E L It arc T o n n n A~ s x o s x
~_ ~.., ~..,, PLRiTbIING rLLtiL~7DSCRPE ARCEIIT]JC TCar~~EYQC~]NG+.:GIS
2601 V~TISTON PiiWY, Scar 243, CRRYNC 2'7513
wcrw_etdpa_cam (off 919.678. 1071 (F'j 919.678.1290
Wet Detention Basin #1 Design
Franklin Grove
Type of Impervious Landcover Area (acres)
Residential Lots 1.80
Roadways /Parking 1.80
Total Impervious Landcover: 3.60
Total Drainage Area (DA): 12.18
'percent of Im~ernous~- Oramage;Areay(I) t 29 56...~' ~'
Calculate the required storage volume (Rv)
for the 1" first flush storm event:
Rv = 0.05 + (0.009)
Where I =Percent of impervious from above.
<< .. RvW= 0.32__..,
Calculate the required drainage volume
from the 1"storm to be controlled:
Volume = (design rainfall)(Rv)(Drainage Aarea)
V=1"(1/12) * Rv (1/12)(D)
~~ ; ~ `V= X13,972 :cubic feet
~C~~.
Calculate the required permanent pool
surface area ratios SA / DA (see Table 1.1 in NCDENR Guide):
I = 29.56
ratio @ 3 feet 1.34 percent.
ratio @ 4 feet 1.08 percent
ratio @ 5 feet 0.97 percent
ratio @ 6 feet 0.83 percent
ratio @ 7 feet 0.70 percent
-area @ r, 3 feet i ~ ~~7,110 '~ square feet ~`
area @` 4 feet, 5,730': ~i square feet:
~.~:
area @ ° 5 feet ;- 5,146, : , -: square`feet
-area @ ~ 6 feet ,4,404 - ' ~ .square feet
c area`@.``~7 feet `3,714 square feet
FILE C9PY
By: SN
Date: 5/24/2006
Revised:
q~~~o~

E L ll 7t = O D D D' lel 1t B R O
PLRx2~iQr sLP.1.II] SCAPE ARCF~TP]C 1VISE sIIdC~247G
2601 Wisrox PxWSr, SrL 243s CRILY NC 27513
~o) 919.675. 1071 ~F'j 919:678.1294
Wet Detention Basin #2 Design
Franklin Grove
Type of Impervious Landcover
Total Impervious Landcover to pond:
Total Drainage Area to pond (DA):
Area (acres)
9.00
19.9
erce ~ko ~ 'vas in ~i _ e ~ e - I~ ~ `x;45 ~~,~
Calculate the required storage volume (Rv)
for the 1"first flush storm event:
Rv = 0.05 + (0.009) " I
Where I =Percent of impervious from above.
Calculate the required drainage volume
from the 1"storm to be controlled:
Volume = (design rainfall)(Rv)(Drainage Area)
V=1"(1/12) " Rv (1/12)(D)
'4 m`~/= ~~D~S ~'"~cubic feet
Calculate the required permanent pool
surtace area ratios SA / DA (see Table 1.1 in NCDENR Guide):
I = 45.23
ratio @ 3 feet 1.90 percent
ratio @ 4 feet 1.58 percent
ratio @ 5 feet 1.38 percent
ratio @ 6 feet 1.18 percent
ratio @ 7 feet 1.00 percent
ea ~ ~ 'f 6,4 7:~~ ~.. _ quare~feef ~1
square feed -;
~*;~area are feet' -
E ,area ~~ t~4. qua feet ;<
~~
area @' ~ ~ ~
~
fi
quare feet;
, y,
,
,~ ;
By: SRN
Date: 6/7/2006
Revised:

E z h sc = o n n n A~ s st o s i
By:
_.~ Pl.RN2.IING~.LRI.ID SCRPE ARCF~TEC rcnzE ~,Ebir~xmrG~GIS
2661 w'FS=ox Piiwsr, SxE 263,, Cnx~rNC 27613 Date:
~vwcr_etdpa_cam ~o~ 919.675. 1671 ~~ 919.675.1290
Revised:
Wet Detention Basin #3 Design
Franklin Grove
Type of Impervious Landcover Area (acres)
Residential Lots 1.27
Roadways /Parking 1.27
Total Impervious Landcover: 2.54
Total Drainage Area (DA): 8.56
nt'of lI pervio~ in Drnage~Area`(I) , `~~'`` `°~29 67.
Calculate the required storage volume (Rv)
for the 1"first flush storm event:
Rv = 0.05 + (0.009)'°
Where 1 =Percent of impervious from above.
'' : Rv = 0.32 '
Calculate the required drainage volume
from the 1" storm to be controlled:
Volume = (design rainfall)(Rv)(Drainage Aarea)
V=1"(1/12) * Rv (1/12)(D)
V=~ 9,852 ~ ~ cubic feet
Calculate the required permanent pool
surface area ratios SA / DA (see Table 1.1 in NCDENR Guide):
I = 29.67
ratio @ 3 feet 1.34 percent
ratio @ 4 feet 1.08 percent
ratio @ 5 feet 0.97 percent
ratio @ 6 feet 0.83 percent
ratio @ 7 feet 0.70 percent
..area @ ; 3 feet :4,997 ~`'~ square feet+
urea`@ ~'~=4 beef ~,;' 4,027 ~ ~ ~ square feet
area @ 5~#eet "x:3,617 ' `square feet.
area @ ,6 feet , .3,095 ' ,~~ ~~square feet ~°
-area @ ' ~7 feet ~~ '2,610 ~~~ ~ ~ ~ 'square feet
SN
5/24/2006

E z r. ~ T o n n n A ~c n se o s x
PLRtiI~+7C"r.LAlm SCAPE ARCE~1'F7C T[JR'E ..F~7C~+~Q247G..GIS
2601 WESrox Px~FrY, SrE 203, CarrtNC 27513
~w_etdpa_com (o) 919.678. 1071 (F'j 919.6'78.1290
Wet Detention Basin #4 Design
Franklin Grove
Type of Impervious Landcover Area (acres)
Total Impervious Landcover to pond: 4.48
Total Drainage Area to pond (DA): 10.68
w~ .-.,~.~...... r...~.-n~ _ ....,.,.., ~ ~~. ~,,...,
Percent of fmp ious~n Drainage Area'~I) ~), . µ _.. .41 95 . , M
Calculate the required storage volume (Rv)
for the 1"first flush storm event:
Rv = 0.05 + (0.009) * I
Where I = Percent of impervious from above.
`Rv =: 0.43
Calculate the required drainage volume
from the 1"storm to be controlled:
Volume = (design. rainfall)(Rv)(Drainage Area)
V=1"(1/12) " Rv (1/12)(D)
_ ' V= ,16,575 ~' cubic feet
Calculate the required permanent pool
surtace area ratios SA / DA (see Table 1.1 in NCDENR Guide):
= 41.95
ratio @ 3 feet 1.86 percent
ratio @ 4 feet 1.55 percent
ratio @ 5 feet 1.35 percent
ratio @ 6 feet 1.15 percent
ratio @ 7 feet 0.98 percent
t :,area @: 3 feet ,~ 8,653 ~ square feet .'
~; -area@' 4;feet ~ ~r 7,211 '" square feet
r.~area,@ ' S #eet t { '6,280 ~ ~~ ~~~-square feet
areal@. 6 feed s5;35D : ' ', :square feet ~,
By: SRN
Date: 6/7/2006
Revised:
area.@ r feet 4,559 ~: `:.square feet

E L ~. ~ T a a n n A~ s Et a s i B
~~Pr.nxr~c.:LarmscxnEAlxc.~aracr[rne.:Fx~n~G.GIS Date:
W 2601 Wasrox F'isW3c, SrE 203, Cax3rNC 2"7513
www_etdpa_com ~o~ 919.678.1071 ~F'j 919:6`78.1296
Revised:
Wet Detention Basin #5 Design
FRANKLIN GROVE
Type of Impervious Landcover Area (acres)
Total Impervious Landcover to pond: 3.09
Total Drainage Area to pond (DA): 6.05'
Percent of. envious in aina a Area I ~'~ X51 ~7~'
Calculate the required storage volume (Rv)
for the 1" first flush storm event:
Rv = 0.05 + (0.009) * I
Where I =Percent of impervious from above.
Rv = 0.51 ~~
Calculate the required drainage volume
from the 1"storm to be controlled:
Volume = (design rainfall)(Rv)(Drainage Area)
V=1"(1/12) " Rv (1/12)(D)
~~ ~ U= 11,193 ~cubicfeet
Calculate the required permanent pool
surtace area ratios SA / DA (see Table 1.1 in NCDENR Guide):
I = 51.07
ratio @ 3 feet 2.09 percent
ratio @ '4 feet 1.76 percent
ratio @ 5 feet 1.52 percent
ratio @ 6 feet 1.32 percent
ratio @ 7 feet 1.11 percent
urea @,: ~3 feet ;5,508 i Ysquare feef~
area @_ ~4 feet ~~ , 4,6381'h ~~< square feet
f ,area @' 5 feet x.4,006 ~ ~ ~~square feet '
,..area @..6 feet ,~;,,~, 3,479 .~`,~~ ~7 ?square feet
~~ 'urea'.@ ~ 7 feet ~ '-,2,925, ``.' " `.square feet "
SRN
6/7/2006

~i E z w 7t i o n n n A s[ H~ o s z B~/;
®~ !, ~ : ~ P1.~u~rmac.LatmscarE Axcrarncrcr~..F~r~xnrG..GIS Date:
2601 WPSTON PES~n , SrE 203s Cxxsr NC 2?513
~cvww_etdpz_com ~o~ 919.675.101 ~F'j 919.6'78.1290 Revised:
Wet Detention Basin #6 Design
Franklin Grove
Type of Impervious Landcover Area (acres)
Total Impervious Landcover to pond: 5.37
Total Drainage Area to pond (DA): 9.44
Percentxof Impervious. in Drainage ,Area;(!) ¢ " ~ 56 89 _"
Calculate the required storage volume (Rv)
for the 1"first flush storm event:
Rv = 0.05 + (0.009) * I
Where I =Percent of impervious from above.
~tv = 0.f56 `
Calculate the required drainage volume
from the 1" storm to be controlled:
Volume = (design rainfall)(Rv)(Drainage Area)
V=1"(1/12) * Rv (1/12)(D)
~"V= 19,257 ~ cubic feet
Calculate the required permanent pool
surtace area ratios SA / DA (see Table 1.1 in NCDENR Guide):
I = 56.89
ratio @ 3 feet 2.30 percent
ratio @ 4 feet 1.94 percent
ratio @ 5 feet 1.65 percent
ratio @ 6 feet 1.45 percent
ratio @ 7 feet 1.23 percent
area @~ 3 feet :9,458 : :square feet
~ area @ ~4`~feet ~. 7,977 ~ <~~ ,`,`square feet
~ ~ area@ ` 5.feet ~~ :;,6,773 >square feet
area;@ ~` 6 feet t '5,950 :fix ;~ square feet
' area @ , 7 feet ~ \5,058 ' , _ square feet
SRN
6R/2006

E L d 7i r O D D D A yt H R O S I B\/:
~r ~ Ptnxr~o.LarIDSClar~Aiz.c~r<rmcnrzze.F~r~arG.GIS J
2601 wPSrox Pxwsr, SxE 20 3t Cx~r NC 27513 Date:
wwvv_etdpa_com ~o~ 919.675. 1071 C~ 919.678.1290 Revised:
Wet Detention Basin #7 Design
FRANKLIN GROVE
Type of Impervious Landcover Area (acres)
Total Impervious Landcover to pond: 0.85
Total Drainage Area to pond (DA): 1.809
~. _
cif Im erv' [mss,°in in 'A~ t~) _~ ~ ~ ~ `~
. ~~.~ .... ,~ z ... _ ~.,.., ~~.
Calculate the required storage volume (Rv)
for the 1"first flush storm event:
Rv = 0.05 + (0.009) ` I
Where I =Percent of impervious from above.
R `= 0.47 ,.. ~.
Calculate the required drainage volume
from the 1"storm to be controlled:
Volume = (design rainfall)(Rv)(Drainage Area)
V=1"(1/12) * Rv (1/12)(D)
~.= 3,094. ~~` `cubic feet
Calculate the required permanent pool
surface area ratios SA / DA (see Table 1.1 in NCDENR Guide):
I = 46.79
ratio @ 3 feet 1.96 percent
ratio @ 4 feet 1.64 percent
ratio @ 5 feet 1.43 percent
ratio @ 6 feet 1.23 percent
ratio @ 7 feet 1.03 percent
ea @T"3 feet ~ ~~~f,545~~`:1:, uarfeefc.'
1 '1 #4
e~~@, 4 ~eet~ t 29 q~i~te feet '~'
area @:5 fe~e~ X12 q~i~re-'feet
area @i~_6 felt` 6S~ t square feet
„area ~@ ' 7 feef; ;,~-~ 814, ~, square ~feet_.
SRN
6/7/2006

E L w y[ T o n n n A~ n g o s i B
~~ ~ f PLRld2~d[" aLA1+II75CAPE ARCFIITECTUP.E.F~r~n1G.GIS Date:
Z6O1 WESTON E'xWY, STE 203, C14IZY NC 27513
www_etdpz_co~ ~o~ 919.678. 1071 ~F'j 919.678.1290
Revised:
Wet Detention Basin #8 Design
Franklin Grove
Type of Impervious Landcover Area (acres)
Total Impervious Landcover to pond: 1.70
Total Drainage Area to pond (DA): 4.744
etv~aus in,~rigeArea (I) ~ '~ : ~~~35 8$"~s
_ _.._~ .. f.. _....~tx ~.~
Calculate the required storage volume (Rv)
for the 1"first flush storm event:
Rv = 0.05 + (0.009) "' I
Where I =Percent of impervious from above.
t. g , Rv = 0:37 _
Calculate the required drainage volume
from the 1" storm to be controlled:
Volume = (design rainfall)(Rv)(Drainage Area)
V=1"(1/12)'` Rv (1/12)(D)
_ >V,= 5;421 0 ' °u cubic feet
Calculate the required permanent pool
surface area ratios SA / DA (see Table 1.1 in NCDENR Guide):
I = 35.88
ratio @ 3 feet 1.57 percent
ratio @ 4 feet 1.29 percent
ratio @ 5 feet 1.14 percent
ratio @ 6 feet 0.96 percent
ratio @ , 7 feet 0.82 percent
area @; 3=feet`s ::~3,2~v3 ~; ~.~'~~ " feet ~~
area ~a 4, ~~: ,566 ~" ~ gU~refeei;~
.area @~''S~' 2,352 gt~efe~t~'
Farea,,@.~ 6 ,~8~a° ;;.~ q are'fee~~~
)~~area'@ . 7 feet ..~ , ~ ,695 ~ _ oLL q are"feet ~`,
SRN
6/7/2006

' E L ~- ~ = o n n n A at n s o s i B~/:
I ~I ~ Pi.axrmac~LxrroscnnrAxc~srnci[.rxzE.i~rr~~xn~G.GIS Date:
2601 WF,iON PKWY, SiE 243s CAiarNC 27513
~vww_etdpa_com ~o) 919.675. 1471 ~F'j 919.678.1294
Revised:
Wet Detention Basin #9 Design
FRANKLIN GROVE
Type of Impervious Landcover Area (acres)
Total Impervious Landcover to pond: 4.49
Total Drainage Area to pond (DA): 9.43
erc~en~f;~e~ous in DrRaina~ Area;. I) ..~ ~~~47 6~'~
Calculate the required storage volume (Rv)
for the 1"first flush storm event:
Rv = 0.05 + (0.009) " I
Where I =Percent of impervious from above.
~' ~Rv '- 0:48..; ` '~`~
Calculate the required drainage volume
from the 1"storm to be controlled:
Volume = (design rainfall)(Rv)(Drainage Area)
V=1"(1/12)'` Rv (1/12)(D)
-V= 16380 ,cubic feet
Calculate the required permanent pool
surface area ratios SA / DA (see Table 1.1 in NCDENR Guide):
I = 47.61
ratio @ 3 feet 1.99 percent
ratio @ 4 feet 1.67 percent
ratio @ 5 feet 1.45 percent
ratio @ 6 feet 1.25 percent
ratio @ 7 feet 1.05 percent
rear@a, ,'C7 ,~ ,...square-feet
~ }~~e~ pszx» ~~ ,~
r~a @~, ~ ee G ~;sgEEu.,are feet
1 T '31 S Y7 l C
='area @{y~ het ~ X5,9 fi ~~s uare'feet
Fared @ :S feet y~'` ~.5,13a.,n~'~ F~ s uare feetx>
Ilfi _ .~. F ~°~+~4,i. mss.. .w ~- ~ z'~air ~v~rr.~«
}.;urea'@' 7~eet ~ __4,313, ~ `;square: feet ~ ,
SRN
6/7/2006

E z~ at T o n n n' A si x3 sz o s x
I PLRN2-II~TG.LAHI]SCRPE.ARCFIITDC TUAE..F1~7C~27NGrGIS
2601 WPSiON PKWY, STE 203, CRRY NC 2'7513
mw~r_etdpa_cam ~o) 919.678. 1671 ~'j 919.675.1290
Wet Detention Basin #10 Design
FRANKLIN GROVE
Type of Impervious Landcover Area (acres)
Total Impervious Landcover to pond: 0.85
Total Drainage Area to pond (DA): 2.11
s rcent f Impeirvious,in Drainage,,Area (I) i~~ ~; 40 19 '~:
Calculate the required storage volume (Rv)
for the 1" first flush storm event:
Rv=0.05+(0.009)"1
Where I = Percent of impervious from above.
~~' Rv~_ ""0.41
Calculate the required drainage volume
from the 1" storm to be controlled:
Volume = (design rainfall)(Rv)(Drainage Area)
V=1"(1/12) * Rv (1/12)(D)
~~ -V= 3,153 ~"cubicfeet
Calculate the required permanent pool
surface area ratios SA / DA (see Table 1.1 in NCDENR Guide):
= 40.19.
ratio @ 3 feet 1.73 percent
ratio @ 4 feet 1.43 percent
ratio @ 5 feet 1.25 percent
ratio @ 6 feet 1.05 percent
ratio @ 7 feet 0.90 percent
~:~a~ea @ 3 feetx~~ ~,f,1*590. ~ .square feet ,;.
' "urea @ ' 4"feet ~"~~~1,314 ' j ~ ~'` square,feef ,
area @ 5 feet ,`1,149: square feet.
x.,, ..
area,~a ~; 6 feet ,, . ; 965 ,~~ ~ "~_~, _; "square "feet '
By: SRN
Date: 6/7/2006
Revised:
area @ _ 7 feet 827. square feet