SW3240302_Supplement-EZ Form_20241001

SUPPLEMENT-EZ COVER PAGE
FCRMS CADED
PROJECT INFORMATION
1 Project Name Preserve at Forest Creek Phase2
2 .Project Area(ac) 104.01
3 Coastal Wetland Area(ac) 0
4 .Surface Water Area(ac) 3.75
5 Is this project High or Low Density? High
6 Does this project use an off-site SCM? No
COMPLIANCE WITH 02H.1003(4)
7 Width of vegetated setbacks provided(feet) 30
8 Will the vegetated setback remain vegetated? Yes
r 9 If BUA is proposed in the setback,does it meet NCAC 02H.1003(4)(c-d)? No
10 Is streambank stabilization proposed on this project? No
NUMBER AND TYPE OF SCMs:
11 Infiltration System 0
12 Bioretention Cell 0
13 Wet Pond 6
14 Stormwater Wetland 0
15 Permeable Pavement 0
16 Sand Filter 0
17 Rainwater Harvesting(RWH) 0
18 Green Roof 0
19 Level Spreader-Filter Strip(LS-FS) 0
20 Disconnected Impervious Surface(DIS) 0
21 Treatment Swale 0
22 Dry Pond 0
23 StormFilter 0
_ 24 Silva Cell 0
25 Bayfilter 0
26 Filterra 0
FORMSLOAOED
DESIGNER CERTIFICATION
27 Name and Title: Frank McMahan,PE
28 Organization: Landdesign
29 Street address: 223 North Graham Street
30 City,State,Zip: Charlotte,NC,28202
31 Phone number(s): [phone]
32 Email: [e-mail]
Certification Statement.
I certify,under penalty of law that this Supplement-EZ form and all supporting Information were prepared under my direction or supervision;that
the information provided In the form is,to the best of my knowledge and belief,true,accurate,and complete,and that the engineering plans,
specifications,operation and maintenance agreements and other supporting information are consistent with the information provided here.
Ussigner
s„%els1 CA/30
ooFssio,�
SFAI_ `>igra I Designer
037773
4�INEP. Y'C
.1;6 MG �Os% 9/3 0 Doz
Seat Uale

Y
O a ' in. Td 'G lh o ,0
io O� aO 'r u`�i oQ � � a � Q mo Q Q Qaa � E a
N � z (CNZooz 0 z z zzz••cc
Qm N co `-
M M O
O.
✓ Y
co"CS CI )"i! rA r/1 N .e 4,E J
in 04 Ln 3q�Y.� � °{ v. o < N- < A < < < a< a- o^a
a fD a N ~ „I CO r Z N Z co Z M Z Z 5 z z cl r COD 0
O Z
F^ c') CO N No N r O
l}L a
0
in UA w �n
0 0
a O M O N co v3 N < g a g a O) a a a a a �p�a
Q. a M Q O0 (o c Z r- z z (O Z Z Z z Z 0
NNN .- M N 03 O N �� 0
a
0) Y
Z Q N N H UI V�t) N to fA . p �V
M O� ul oUv co 0N00 NNaga (C Q Q aaa co w M•`oQ
EL m ,- t` N :-E oo N,z 'tZ up z z ZZiR rp�N
OA (0 M O 0) r T 0) r` R CO r CO Z
N M CD N O
3 a
CO Y
CI-,M M M N in t) N N p t°
N _ _0 a,) o C) < < '-< g a a a a a� - te a
aM ") 8 0) z zcs, z CO Z Z ZzzdDvo
w r` ti N M r° v ^ v 0
a
, I
r` _ NC
z N No o a_ ) c
O O O Q en Q Q Q N Q Q a Q Q a 0._ O a
NNQ Z02Z z Z ZZZ �F 0 0N
Lo Z
W CO (O M N a N N M O
a
_ _ m ro
m
a N N N O )~A - - y E
CO (0(O r r O `v)T ti 7 7
0 O o COp IWp N N O Q M Q M Q Q Q Q Q 0 Q Q a 2 Q N
1-N Z O Z M M O 0) Q) p �f0 Z C) Z f�Fp0 Z Z Z Z Z �Z Z Z co iiiC m r3
m V LOU)in co co N N cD O O CC
UJ
c0 m c
t €A n.ti
o .c LU)
C co OC
m 0
IA 2 0 K C F
m y o G 2 c o v O g € •O
(.. m o Cr_ L m O 0
M . m > C m O E c C • `.� m C C D
0 0 g z E E ' ti
c n CD CI 0 x c
CO o 8 E E o m o m HS m
N
C ro Zy.1 O N-. O C m > > `. m o C Q
WmroNa p z v 0 $ a n c rE ,g 0) • ro7
O c c-� o m o c m m m pi, E a (� a m d m
.m m o m m P C Q C ro ,v_ c E (o ,v. Z v -
c a c -mi g'm > Q m m E e a ro Z m
a•E > 3 m cc Lm m n n 8 m � mom- fO - yU.2 O $ o)$ _
�titwa O mm D co m € o' € o• !0 $ rv) Fn ° t
W m o o a u. m m m E o � c a m v o, ar. m m� ..-m =m m c o H .. � � n�
0 v m 2 $ z m a coat rsoc-� c Crr.v,' cm oir{ g)i • m = H�
< g)E a E o 0 U c •c c .E o c Q c ' �>a y n C a a D D 7 7 0 c U. m u
LDoc N Ny� EE < < Q D � 5 3- - rT � mmrnmmCC - .2Zas a < o
Zc a m 7 � ro ro �� o� �m o - wpp 13e c c'- ro rn.E rn rn w > om m � O z
_ N O� Q j D V O ro m m m m .F m F m Y W .0 O O 7 $ c Z C E c o C C C U' M N ,C �
Q .t- m0 uu.-`1' m m O C O 0 QC1 m t an d (n Q' d'LL O _6 ro d) € iA N E 'vi Vi V m C Q o g
7 y O N > g -F- O O F Z 4 Z aO[L ' I Z N Z g S` ilid O CS U 2 O. ro mO_ 2
S C
Q rNM ..4. N ON )01- c0 0) OTN M R in(0 h CO CO 0 N 2
G r r r N N R N O O

WET POND
1 Drainage area number 7 B 9_ 10 _ 11 12 .
2 Minimum required treatment volume(co ft) -1 35481 cf39268 cf 43108 c1�-29955 C) I 17074 cf I_ 16861 cf
tiBIB1,L UDC tilONt1f11. -*rib d
3 Is the SCM sized to treat the SW from a1 surfaces at build.out? [ Yes Yes Yes Yes Yes Yes
4 Is the SCM located away from contaminated soils? 1 Yes Yes Yes _ Yes '- Yes Yes
5 What are the side slopes of the SCM(H:V)? 3:1 3:1 3:1 3:1 3:1 3:1
Does the SCM have retaining walls,gabion walls or other
fi Yes No Yes Yes Yes Yes
engineered side slopes?
7 Are the inlets,outlets,and receiving stream protected from erosion Yes Yes Yes Yes Yes Yes
(10-year storm)? -
8 Is there an overflow or bypass for inflow volume in excess of the Yes Yes Yes Yes Yes Yes
_ )design volume?
9 What is the method for dewatering the SCM for maintenance? Pump(preferred Pump(preferred) Pump,preferrel Pump(preferred) Pump(preferred) Pump(preferred)
101 applicable,will the SCM be cleaned out after construction? Yes Yes Yes _ Yes Yes Yes
11 Does the maintenance access convoy with General MDC(8)? Yes Yes Yes Yes Yes Yes-
12Does the drainag.easement comply with General MDC(9)? Yes Yes Yes _Yes Yes Yes
13 If the SCM is on a single family lot,does(wit?)the plat comply with WA N/A N/A N/A N/A N/A
General MDC(1�? -�
14 Is there an O&M Agreement that complies with General MDC(11)7 Yes Yes Yea Yes Yes Yea
15 Is there an O&M Plan that complies with General MDC(12)? Yes Yes Yes Yes Yes Yes
16 Does the SCM follow the device specific MDC? -_ Yes �- Yes Yes Yes Yes Yes
17 Was the SCM designed by an NC licensed professional? Yes Yes _ Yes Yes Yes Yes
WETPONDMotThO 01N.1013
18 Sizing method used SA/DA SPJDA SA/DA SA/DA SA/DA SA/DA
19 Has a stagae.'storage table been provided in the calculations? Yes_ Yes Yes Yes Yes Yes
Elevation o1 the excavated main pool depth(bottom of sediment * "
20. 639,60 616.50 849.50 649.50 627.50 608.50
(removal)(fmsl}
21,Elevation of the main pool bottom(top of sediment removal)(fmsl) 840.00 617.00 850.00 650.00 628.00 609.00
22)Elevetion of the bottom of the vegetated shelf{Imal) 643.50 621.50 853.50 854.50 632.50 613.50
23 Elevation of the permanent pool{fmsl) 644.00 622.00 • 654.00 _..6__ 655.00 . 633.00 614.00-
24 Elevation of the top of the vegetated shell(Imst) _.... 644.50 ___ •_. 622.50 4 654.50 - 655.50 633-it ,50 614.50 _
25 Elevation of the temporary pool(fmat) 646.30 624.00 856.25 856.80 634.75 615.75
26 Surface area of the mainpermanentpool(sq_uare feet) 20972 15467 19530 -15439 _ j 8285 -� 7955 _
27 Volume of the main permanent pool(cubic feet! _ 71528 cf62285 cf69571 cf61875 cf31369 ci 29266 cf
28 Avera je depth of the main pcol(feet) '- 3.41 fl 4.03 It 3.56 ft 4.01 ft 3.80 ft 3.68 fl
29 Average depth equation used Equation 2 Equation 2 Equation 2 Egwtion 2 Equation 2 Equation 2
30 If using equation 3,mainpoolpedmeter(feet) _ N/A _ N/A N/A _ NIA WA _ N/A
31 Ifusing equation 3,width of submerged veg.shelf(feet) N/A WA -1 N/A N/A N/A N/A
32 Volume of the forebay(cubic feet) 13856 cf 11358 ci 10546 d 10040 ci 4934 CI-1- 4834 d
33 Is this 15-20%of the volume in the main pool? Yes ~ Yes Yes ~ Yes Yes ;- Yes
34 Clean-out depth for forebay(inches) 6 in 6 In _6 In 6 in 6 in 6 in
35 Design volume of SCM(cu fl) - _ - 63480 cf y 42439 d -- 56209 elI 38076 d 18870 cf ' - 19641 el
36 Is the outlet an orifice or a weir? Orifice Orifice _ Orifice Orifice Orifice Odlice
37 If orifice,orifice diameter(inches) 3.00 in 3.00 in 3.00 in 3.00 in 2.00 in _ � 2.25 in
38 N weir,weir heigdl(inches) ___ N/A WA N/A N/A N/A N/A
39 If weir weir length(inches) WA N/A N/A N/A N/A N/A
40 Drawdown time for the temporary pool(days) _3.89 2.82 _ 3.3 _ 2.65 2.81 ' 2.45 ,
41 Are the Intel(s)and outlet located in a manner that avoids shod- Yes Yes - Yes Yes Yes Yes
-_ circuiting?
42 Are berms or baffles provided to Improve the flow path? No No No No No No
43 Depth of forebay at entrance(inches) _ _58 in 70 in 58 In _ 70 in 70 in 70 In
44 Depth of forebay at exit(inches) T- 54 in 66 in 54 In 66 In 66 in 66 in
45 Does water flow out of the forebay in a non-erosive manner? Yes Yes Yes Yes Yes Yes
46 Width of the vegetated shelf(feet) 61t - 6 ft 6 ft 6 ft 611 6 ft
47 Slope of vegetated shell(H:V) 6:1 6:1 8:1 8:1 6:1 8:1
48 Does the orifice drawdown from below the top surface of the Yes Yes Yes Yes Yes Yes
permanent pc ol?
48 Does the pond minimize impacts to the receiving channel from the 1- Yes Yes Yes Yes Yes Yes
-yr,24-hr storm? No
_
50 Are fountains proposed?(11Y,please provide documentation that No No No No No
MDC;9i Is met.;
51 Is a trash rack or other device provided to protect the outlet system? Yes Yes Yes Yes Yes Yes
52 Are the dam and embankment planted in non-dumping turf grass? Yes Yes Yes Yea Yes Yes
HYBRID HYBRID HYBRID HYBRID HYBRID HYBRID
53 Species of turf that will be used on the dam and embankment BERMUDA BERMUDA BERMUDA BERMUDA __ BERMUDA _ BERMUDA
54 Has a planting plan been provided for the vegetated shelf? Yes Yes Yes Yes Yes Yea
ADDITIONAL INFORI ATI0N
Please use this space to provide any additional information about
55 the wet pondisl:
2