SW6240606_Supplement-EZ Form_20240830

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
'ROJECT INFORMATION .. ano.. "
1 Project Name Village at Rockfish Phase V
2 Project Area(ac) 15.44
3 Coastal Wetland Area(ac) 0
4 Surface Water Area(ac) 1.38 i
5 Is this project High or Low Density? Low .
6 ,Does this project use an off-site SCM? No
.OMPLIANCE WITH 02H.1003(4)
87 :Width
vegetated setbacks
provided Wi)the vege sek repo (feet)
vegetated?
30 ,w Y ".�,,.n s
9 'If BUA is proposed in the setback,does it meet NCAC 02H 1003(4)(c-d)? Yes
10 i Is streambank stabilization proposed on this project? No
!UMBER AND TYPE OF SCMs: I
11 Infiltration System
12 Bioretention Cell
13 :Wet Pond
14 :Stormwater Wetland
15 Permeable Pavement (
16 Sand Filter
17 ,Rainwater Harvesting(RWH)
18 ''Green Roof t
19 Level Spreader-Filter Strip(LS-FS) 1
20 Disconnected Impervious Surface(DIS)
21 :Treatment Swale
22 Dry Pond )
23 !StormFilter l
24 Silva Cell
25 Bayfilter l
i
26 'Filterra
FORMS LOADED
IESIGNER CERTIFICATION
27 Name and Title: C. Scott Brown,PE
28 ;Organization 4D Site Solutions, Inc
29 Street address: 409 Chicago Drive-Ste 112 E
30 City,State,Zip: Fayetteville, NC 28306 l
31 Phone number(s): 910-426-6777 ,
32 Email sbrown@4dsitesolutionscorn l
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
1°" rill,
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,, :
SEAL' Signature of besigner
027452
S'..G/NEED.*�
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L Z. 0 '3 2.
Seal v Date

DRAINAGE AREAS
, 7
1 Ils this a high density project? l No
2 j If so, number of drainage areas/SCMs 0
3 jDoes this project have low density areas? Yes
4 j If so,number of low density drainage areas ' 1
.1
Is all/part of this project subject to previous rule
5 versions? l No .
FORMS LOADED
1RAINAGE AREA INFORMATION 1 Entire Site ' --tD-1-1
4 iType of SCM I Low Density
5 'Total drainage area(sq ft) 672,421
6 Onsite drainage area(sq ft) t li 672421
I
7 1Offsite drainage area(sq ft) ri
1 5
8 jlotal BUA in pfgject(sqft) .1 161378 sf
New BUA on subdivided lots(subject to
9 jpermitting)(sqft) 1 128524 sf 1
New BUA not on subdivided lots(subject to 1 I
g i
10 !permitting)(St) ri 32854 sf
11 IOffsite BUA(sq ft) 1 sf
j..
I i
12 i Breakdown of new BUA not on subdivided lots:-Parking(sq ft)
1
I
-Sidewalk(sq ft) 79 sf
-Roof(sq ft_l j
' -Roadwayisq ft) i i 32775 sf
-Future(sq ft) I
i -
i -Other, please specify in the comment box
jbelow isq_ft)
i
New infiltrating permeable pavement on
i 1
13 'subdivided lots(sq ft)
t 1
INew infiltrating permeable pavement not on
14 jsubdivided lots(sq ft)
1 I i
Existing BUA that will remain(not subject to
15 jpermitting)(sq ft) ir
t 1
16 Existing_BUA that is area ldy permitted(sq ft)
17 I Existing BUA that will be removed(sq ft) 1
18 1—Percent BUA 1 24%
19 rj Design storm Ainches)
20 Desrgn volume of SCM(cu ft)
21 Calculation method for design volume
1.1890011MAM........61......1.1.0.."....war................esommam
ODITIONAL INFORMATION
iFlease use this space to provide any additional information about the
22 i drainage area(s):
,,,

LOW DENSITY
RE UIREMENTS FOR LOW DENSITY PROJECTS FROM 02H.1003
1 DESIGN,Is project below density thresholds set forth in the applicable stormwater rule? Yes
t 2 ,Does project maximize dispersed flow and minimize channelization of flow? Yes
3 Has the use of piping been minimized per.1003(2)(c)? Yes
4 j Side slopes of the vegetated conveyances(H:V) 3:1
5 'Maximum velocity in the vegetated conveyances during the 10-year storm? 4.5
1. 6 Are curb outlet swales proposed? Yes
7 ! Maximum longitudinal slope of curb outlet swale(s)(%) 5%
8 Bottom width of curb outlet swale(s)(feet) 2 ft
9 Maximum side slope of curb outlet swale(s)(H:V) 3:1
10 Minimum length of curb outlet swale(s)(feet) 100 ft
11 Are treatment swales used instead of curb outlet swales? No
12 Is stormwater released at the edge of the setback as dispersed flow? Yes
1. 13 :Have stormwater outlets been designed to prevent downslope erosion? Yes
14 Are variations to rule.1003 proposed? No
ADDITIONAL INFORMATION
15 Please use this space to provide any additional information about this low density project:
ti
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1
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Drainage , Pervious
Swale BUA Q Slope Va. i V,a,,,, Flow depth
Area (ac) area I C
# (cfs) (%) (fps) (fps) (ft)
lac) tact
1 0.39 0.30 0.09 0.80 2.47 0.01 4.50 1.57 0.46
2 1.01 0.47 0.54 0.60 4.79 0.01 2.00 1.66 0.70
3 0.46 0.21 0.25 0.60 2.18 0.01 4.50 1.24 0.50
4 1.16 0.54 0.62 0.60 5.51 0.01 4.50 1.75 0.74
6 0.97 0.45 0.52 0.60 4.60 0.01 2.00 1.98 0.61
6 0.96 0.44 0.52 0.60 4.56 0.01 2.00 1.64 0.69
7 1.96 t 0.75 j 1.21 0.55 8.53 0.01 t 2.00 1.99 0.91
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