SW6230705_Supplement-EZ Form_20240304

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
1ROJECT INFORMATION
1 Project Name Serenity Subdivision Ph.3-5
._. . ... ._ _...
2 I Project Area(ac) 163.07
--
____3_1Coastal Wetland Area lac) _ 0
4 IStirface Water Area(ac) 1.26
5 Is this project High or Low Density? Both High and Low Density
6 I Does this project use an off-site SCM? No
;OMPUANCE WITH 02H.1003(4) 1
19...41[SteMfat
Width of vegetated setbacks provided(feet) 100&200
8 IWill the vegetated setback remain vegetated? . Yes
i
9 !If BUA is proposed in the setback,does it meet NCAC 02H.1003(4)(c-d)? ' N/A 1
10 ,I Is streambank stabilization proposed on this project? No a
,. ..
LUMBER AND TYPE OF SCMs: -1
11 !Infiltration System -i 1
12 i Bioretention Cell
13 Wet Pond ,, 5 I
14 iStormwater Wetland ,
. I
,
i
15Permeable Pavement
16 Sand Filter
17 Rainwater Harvesting(RWH)
I
18 'Green Roof ,: I
19 Level Spreader-Filter Strip(LS-FS)
20 Disconnected Impervious Surface(DIS)
21 ;Treatment Swale
!
1
22 ; Pond
,Dry ! t
23 .StormFilter 1 24 ;Silva Cell
25 4-. 1 Bayfilter i
26 I Filterra FORMS LOADED
3ES1GNER CERTIFICATION
27 )Name and Title: C. Scott BrownPE
28 lOrganization: 4D Site, Solutions Inc. .-I!
29 I Street address: 409 Chicago Dr. Ste. 112 1
4 1
30 City State,Zip: Fayetteville, NC 28306 1
i
31 i Phone number(s): 910-426-6777
32 !Ema sbrown©4dsitesolutions.com
.
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.
Designer
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Signature of Designer
027452 .
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Seal Date

DRAINAGE AREAS
1 ___-Is this a high density_project? Yes
2 If so mg number of draa a areas/SCMs 5
3 E Does this project have low density areas? Yes 5
4 ; If so number of low densely draina�eareas 1
!Is all/part of this project subject to previous rule _
(versions? 5
55
IFORMS LOADEDI
j RAINAGE AREA INFORMATION 1 Entire Site 1 2 3 q
4 ;Type of SCM t Wet Pond _Wet Pond 12 Wet Pond 13 Wet Pond 14 Wet Pond 15____
5 Total drainage area(sq ft) 7103334 450039 978807 658114 703037 _
.__6 1_Onsite drainage area(sq ft) 15 7047417 427950 950020 653073 703037
7 __Offsitedrainage area(sq_ft) 55917 22089 28787 5041 0
8Total BUA in project jsq„ftj 1669425 sf 214713 sf 483779 sf 317703 sf 321768 sf,_
{New BUA on subdivided lots(subject to f
_..9_._.'Permittmn.(sq ft.)_.__.. _951012 sf + 120792 sf 264900sf 186180 sf w 202900 sf..__
New BUA not on subdivided lots(subject to
10 rpermtttm (sf) 1 662496 sf i 71832 sf 190092 sf 51 126482 sf 118868 sf
11 ._I Offsite BUA(sg ft)_ _771. 55917 sf _� 22089 sf 28787 sf 5041 sf
12 I Breakdown of new BUA not on subdivided lots f
Parking{sq ft) __
I Sidewalkisq-ftj 129319 sf 13086 sf 35254 sf 26443 sf _ 23771 sf
Roof(salt)._ _
9, Roadway jsq ft). . -,.. 417613 sf 46238 sf - 117534 sf 81843sf _75097 sf _,.
Future.(sq ftj , A,__-,_20000 sf h
I 20000 sf E__
-Other, please specify in the comment box 31
below fsq5ft)_ f 90581 sf 12508 sf 17304 sf 18196 sf 20000 sf
New infiltrating permeable pavement on ...__..__.._.. _._ _ ._.
51
13 ysubdivided:19 s(K.11 ti
New infiltrating permeable pavement not on
14 jsubdivided lots(sg_ft) i i
Existing BUA that will remain(not subject to A
15 permitting)fsq ft) 1
1-id BUA that is alreadypermitted_ ft —
17-4Existmg BUA that will be removed fsq ft)
18 Percent BUA 23% 48% 49% 48% ___ _46%______
19 i Design storm(inches) loin 1.0 in 1 A in ...___. 1 0 in
20 ?Des n volume of SCM(cuftj 19036 cf 46650 cf 28499 cf 28341 cf
21 iCalcu i nlation method for del volume Sim le Sim le _4 - Sim le Sim le
ADDITIONAL INFORMATION
Please
u use
this to provide any additional information about the w 22 e
Other impervious listed is for the surface water of the pond. 50
3

DRAINAGE AREAS
1 GIs this a high densti project? Yes
2 I If so, number of drainage areas/SCMs 5
3 [Does thisproject have low density areas? Yes
4_._. If so,number of low density drainage areas 1
I Is all/part of this project subject to previous rule i
I_ 5...Lversions? _._. _.._ _.. No
FORMS LOADED
DRAINAGE AREA INFORMATION Entire i 1• 5 i LD 1
4 i Type of SCM Wet Pond 4 Wet Pond 16 - i'
5 Total drainage area(sq ft) 7103334 g 548797 3764540 t
6 Onsite drainage area(sq ft) 7047417 I 548797 3764540
7 Offsite drainage area(sq ft) 55917 0
8 tTotal BUA m ro ect ft i 1669425 sf 285107 sf 46355 sf
9 New BUA on subdivided lots(subject to
„9_.1P g91ittmg)_(sq ft.) .. _ 951012 sf 163840 sf ._ 12400 sf
• !New BUA not on subdivided lots(subject to
10 s ermittm sf t 662496 sf t 121267 sf it 33955 sf
11 ,Offsite BUAjsq ftf _ 55917 sf I_ __ g
12 Breakdown of new BUA not on subdivided lots _
Parking(Nit", 4983 sf ii
i
it
Sidewalk(sq ft) 129319 sf.._, 24372 6393 sf E_ . Roof(Sgftl
d ..._.. . .._..
Roaway(sq ft) 417613 sf 74322 sfsf 22579 sf r
be-lo Other, please specify in the comment box 90581 sf 22573 sf
Futures ft_ 20000 sf
t
554 ) _.._. .... ........ ...._ 1
i New infiltrating permeable pavement on
13 subdividedlots.(sq ft) _.. .-. __... .__
New infiltrating permeable pavement not on 1
14 `subdivided lots(sq ft). . .._.. t !
'Existing BUA that will remain(not subject to i,
15 permitting)(sgft)
16 Existing BUA that is already_permitted(so ft)_
17 Existin BUA that will be removed ft)
18 a Percent BUA 23%_
19__tDestgn storm finches) 1.0 in
20 dDesian volume of SCM(cu ft) -. i
i nvolu
21 'Calculation method for des me Sim le 1
ADDITIONAL INFORMATION
'Please use this space to provide any additional information about thel
22drainae area(s).
ti
Other impervious listed is for the surface water of the pond. 1
1
g
i

WET POND
i Drainagp area number
-;- 12 13 14 15 16,
. , . ....... ............ .,
2i Minimum required treatmenlyolur211SWL _ : 17979 cf 40362 cf 26570 cf 27062 cf 23670 cf
5ENERAL DC ROM 02H.1050
,11.60tntstter.M.119 14514..11.9....1100094.1.0.4
31Is the SCM sized to treat the SW from all surfaces at build-out? Yes Yes Yes Yes es
______ ....... _____
4;Is the SCM located away from contaminated soils? Yes Yes Ye sT" Yes sf ..„
5rWhat are the side slopes of the SCM(H:V)? 3:1
3:1
t 3:1 3.1 3:1 .. . __
. 4
Does the SCM have retaining walls,gabion walls or other engineered
6 No il No Yes No 1 Yes!side slopes?
5---
Are the inlets,outlets,and receiving stream protected from erosion ---
7(107year storm
Yes i Yes Yes Yes Yes
)? !
Is there an overflow or bypass for inflow volume in excess of the I 1
8, . Yes , Yes I Yes Yes Yes
idesign volume? : t
1 91_ hat is the method for dewatering the SCM for maintenance? i Pump(preferred) Purrp(preferredyt Pump(preferred) Pump(preferred) PurnpApreferred)I
10'If applicable,will the SCM be cleaned out after construction? Yes Yes Yes Yes Yes
-
11 Does the maintenance access comply with General MDC(8)? . Yes Yes Yes Yes Yes
-
12 Does the drainage easement comp!),with General MDC(9)? Yes Yes Yes Yes, Yes
131'lf the SCM is on a single family lot,does(will?)the plat comply with
N/A N/A N/A N/A N/A
__LGeneral MDC,(10)?
i
14 Is there an O&M Agreement that complies with General MDC(11)? Yes Yes Yes Yes Yes
151Is there an O&M Plan that complies with General MDC(12)? Yes Yes Yes Yes Yes ,
16 Does the SCM follow the device specific MDC? Yes Yes Yes . Yes Yes
17rVVas the SCM desi ned„ImarafIC licensedzof_essional? _ ,,,,, ,. , Yes I Yes
Yes Yes ;:
..„
i F H
SOPMANOWL.A.M.1(111
18!Sizing method used i SA/DA A SA/DA SA/DA SNDA SA/DA
19 i Has a stage/storage table been provided in the calculations? ; Yes i Yes 5- Yes Yes
/ Yes
is
; 1
20i Elevation of the excavated main pool depth(bottom of sediment ' I f 306.50 3 301.50 % 297.50 i 290.50 273.50
;removal)(frnsll ,
-/---- 1 -1
21 Elevation of the main pool bottom(top of sediment removal)(fmsl) ! 307.00
1 302.00 298.00 [ 291.00 274.00
22Elevation of the bottom of the vegetated shelf(fmsl)_ 312.00 i 307.00 302.50 295.00 279.00 i
.
23:1Elevation of the permanent pool(fmsly 312.50 1,, 307.50 " 303.00 ' 295.50 279.50
24 i Elevation of the top of the vegetated shelf(fms1) 1 313.00 308.00 303.50 296.00 280.00
i
254Elevation of the temporarypool(fmsl) f 313.86 309.42 304.82 296.79 281.02
1
26,1Surface area of the main permanent pool(square feet) 9633 16644 10658 16831 . 12144
,i
27Volume of the mainpermanent pool(cubic feet)
34387 cf j, 68687 cf 41003 cf 61958 cf ' 51599 cf
28 lAverag_e depth of the main pool(feet) 4. 3.60 ft 4.10 ft 3.90 ft 3.50 ft
4.20 ft
*Average depth equation used , Equation 2 1 Equation 2 I Equation 2 Equation 2 ; Equation 2
If using equation 3,main pool perimeter(feet) 1
--i
31 If using equation 3,width of submerged veg.shelf(feet) ;-1 2
32 Volume of the forebay(cubic feet) 5917 cf i 12614 cf t 7358 cf ; 9950 cf 6 9538 cf !:
33,Is this 15-20%of the volume in the main pool? Yes 1 Yes t Yes J., Yes f Yes w:
34Clean-out depth for forebay(inches) 66 in Z 66 in t t 50 in t 54 in 66 in a
I
35 Design volume of SCM(cu ft) : 19036 cf 46650 cf 8 t_ 28551 cf - 2 341 cf I 25863 cf 1
1 36 Is the outlet an orifice or a weir? Orifice ,.,; Orifice Orifice Orifice i Orifice
37 If orifice,orifice diameter(inches) 2 in .- 3 in ,,,' 3 in 1 3 in 3 in I
g i t
38 If weir,weir height(inches) ,; 1 1 1 I t-
f39I weir,weir length(pches) , 1 _.' i
40prawdown time for the temporarypool(days), 2 2.8 I 2 2.1 2.2
41 ircuiti Are the inlet(s)and outlet located in a manner that avoids short- , Yes Yes Yes Yes Yes
42 the
/kre berms or baffles provided to improve flow path? ; No No No No No
I
43'i Depth of forebay at entrancelinches) 89 in 86 in 73 in 78 in 87 in
1.--- I
444Depth of forebay at exit(inches) , 73 in 74 in 67 in 61 in 73 in
451Does water flow out of the forebay in a non-erosive manner? I Yes Yes Yes Yes Yes
11
46Width of the vegetated shelf(feet) 6 ft 1 6 ft 6 ft 6 ft 6 ft
I
471Slope of vegetated shelf(H:V) ,
6:1 0
6:1 6:1 6:1 6:1
48i Does the orifice drawdown from below the top surface of the i 1 1
Yes Yes Yes Yes Yes
permanent pool? . •
Does the pond minimize impacts to the receiving channel from the 1- , I
I
Yes Yes Yes Yes Yes
49 vr,24-hr storm?
- -
Are fountains proposed?(If Y,please provide documentation that ,
50! No i No No No No
,MDC(9)is met.)
I
1 - -
1 I
51;Is a trash rack or other device provided to protect the outlet system? Yes Yes Yes Yes i I i
1 Yes Z--,
, 1
52 Are the dam and embankment planted in non-clumping turf grass? Yes Yes 1 Yes Yes Yes
53 Species of turf that will be used on the dam and embankment , centipede [ centipede 1, centipede centipede centipede
541Has a lantin lan beeurovided for th„,e_yagetated,shelf? ,_ : Yes Yes _1 Yes Yes Yes
ADDITIONAL INFORMATION
the
APeN...e.SwtatciaHfl.a.I.t.z..se.R.Wtirt..td.a.k.i.a.N.I.
I Please use this space to provide any additional information about the
55 wet pond(s):
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'A
SCM 1204&
Wet Pond 2 10:21 AM 2/8/2024

LOW DENSITY
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1 1 Is project below density thresholds set forth in the applicable stormwater rule? 1 Yes
2 'Does pruject maximize dispersed flow and minimize channelization of flow? , Yes
3 ;Has the use of piping been minimized per.1003(2)(c)? Yes
4 ;Side slopes of the vegetated conveyances(H:V) 3 sf
5 ;Maximum velocity in the vegetated conveyances during the 10-year storm? 2.2
6 Are curb outlet swales proposed?
7 , Maximum longitudinal slope of curb outlet swale(s)(%) 1%
8 Bottom width of curb outlet swale(s)(feet) i Yes
i
i 2 ft
9 Maximum side slope of curb outlet swale(s)(H:V) ; 3:1
10 Minimum length of curb outlet swale(s)(feet)11 Are treatment swales used instead of curb outlet swales?
!,Is stormwater released at the edge of the setback as dispersed flow? 145 ft
No
; Yes
13 Have stormwater outlets been designed to prevent downslope erosion? Yes
1.--
14 I Are variations to rule.1003 proposed? , No V
ADDITIONAL INFORMATION
15 ,Please use this space to provide any additional information about this low density project:
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1
.1110# ...2.4.....45NIR
Drainage ii BUA Pervious ;
Swale Q Slope ; Va.. 1 V.aa, ;Flow depth
Area ! area ; C ;
#
htcl 1 (ac) tact (cis) (k) I (fps) ; (fps) ; (ft)
'
1 1.90 , 0.79 1.11 0.57 8.11 1.00 ! 4.50 2.20 0.82
,
i... ft ,
2 '
3 ; .
4 ,
it h
5 . t ,
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6 . ; t
7 :
8
9
10
11
12
1 ,
16 ,
17 ;
18 ;
.!. ;
, +21
23 ;
r ;
25 '
27 ,
28 '
29 .
30 ,
_ _ _