SW6230501_Supplement-EZ Form_20230721

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
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PROJECT INFORMATION ,a
1 Project Name Ila's Way Subdivision
2 Project Area(ac) 28.7
I 3 Coastal Wetland Area(ac) 0
4 .Surface Water Area(ac) 0
5 Is this project High or Low Density? Low
6 ;Does this protect use an off-site SCM? No
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COMPLIANCE WITH 02H.1003(4) u., _,__.,,.�
7 Width of vegetated setbacks provided(feet) 30'
8 '•Will the vegetated setback remain vegetated? N/A
9 *If )(c
BUA is proposed in the setback,does it meet NCAC 02H.1003(4 -d)? N/A
10 j Is streambank stabilization proposed on this project? No
NUMBER AND TYPE OF SCMs:..�
11 !Infiltration System
12 i Bioretention Cell
13 Wet Pond
14 Stormwater Wetland
15 ,Permeable Pavement
16 !Sand Filter
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17 !Rainwater Harvesting(RWH)
18 Green Roof
19 !Level Spreader-Filter Strip(LS-FS)
20 I Disconnected Impervious Surface(DIS)
21 Treatment Swale
22 !Dry Pond
23 IStormFilter
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24 .Silva Cell
I. 25 Bayfilter
+ 26 .Filterra
FORMS LOADED
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DESIf3NER CERTIFICATION 1
27 !Name and Title: Scott Brown,PE-Vice President
28 ,Organization: 4D Site Solutions, Inc
29 ;Street address: 409 Chicago Drive,Suite 112
30 City,State,Zip: Fayetteville, NC 28306
31 !Phone number(s): 910-426-6777
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.
Deslaner
ottl11Ilii,,, I7
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SEAL • - Signature of Designer
027452 =
S,. GINEP. �
c0. P,o 0"1-Z(&23
Seal Date

DRAINAGE AREAS
1 Rts this a high density protect? No
2 . If so number of drainage areas/SCMs 0
3 Does thisproject have low density areas? Yes
4 x If sot number of low density drainage areas 1
Is all/part of this project subject to previous rule
5 wersions7 I No
FORMS LOADED
DRAINAGE AREA INFORMATION Entire Site LD 1
4ape of SCM
5 Total drainage area(sq ft) 1250148 1250148
6 Onsite drainage area(sq ft) 1250148 '' 1250148
7 iOffsitedrainage area(sq ft)
8 Total BUA in project(sq ft) 300030 sf 300030 sf_
New BUA on subdivided lots(subject to
9 :permitting)(eq.ft) 242214 sf 242214 sf
'iNew BUA not on subdivided lots(subject to
10 permittin91(VI_..-- -.- 57816 sf 57816 sf ..__.__.
i 11 LOffsite BUAlsq_ft),__
12 Breakdown of new BUA not on subdivided lots:
� Parkin9(sq ft)..
Side alk(sq ft)�_
Roof(sq ft)
Roadway(sq ft} 57816 sf 57816 sf
Future(sq ft) _...
-Other, please specify in the comment box
below(sq ft)
New infiltrating permeable pavement on
13 isubdivided lots(sq ft) ,
New infiltrating permeable pavement not on
14 subdivided lots ft
I Existing BUA that will remain(not subject to
15 jpermittinq)(sq ft)
16 LExisting_BUA that is already permitted(sq ft) _ -
17 ;Existing BUA that will be removed(sg ft)-
18 !Percent BUA 24% 24%
19 Design storm(inches 1 0 in 1.0 in
20 Design volume of SCM(cu t)
21 !Calculation method for design volume
-ADDITIONAL INFORMATION
!Please use this space to provide any additional information about the i;
22 ;drainage area(s): _.

LOW DENSITY
D G R Ul EMENTS FOR LOW ENSITY ROA S FROM 0 H.1003
1 ;Is project below density thresholds set forth in the applicable stormwater rule? I Yes
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2 Does project maximize dispersed flow and minimize channelization of flow? -Yes
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3 Has the use of piping been minimized per.1003(2)(c)?
I • Yes
4 1Side slopes of the vegetated conveyances(H:V) 3 sf •
5 I Maximum velocity in the vegetated conveyances during the 10-year storm? . ' 3.64
6 Are curb outlet swales proposed? No
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7 f Maximum longitudinal slope of curb outlet swale(s)(%)
_
8 Bottom width of curb outlet swale(s)(feet)
9 1 Maximum side slope of curb outlet swale(s)(H:V)
10 1 Minimum length of curb outlet swale(s)(feet)
11 Are treatment swales used instead of curb outlet swales?
12 ;Is stormwater released at the edge of the setback as dispersed flow? Yes
13 I Have stormwater outlets been designed to prevent downslope erosion? Yes
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14 I Are variations to rule.1003 proposed? No
ADDITIONAL INFORMATION -
15 Please use this space to provide any additional information about this low density project:
Drainage BUA Pervious ,
Swale . Q Slope Va.,, V....1 i Flow depth
Area area C i (cfs) (fps) ! (f)
# (ac) (V (fin)
(act tact
!
1 2.82 0.43 2.39 0.40 7.12 1.20 5.00 2.45 i 0.90
..1.
2 0.52 0.12 0.40 0.45 1.84 1.50 5.00 1.89 . 0.49
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3 13.95 1.07 12.88 0.35 I 30.81 0.30 5.00 2.10 2.13
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4 11.17 0.86 10.31 0.35 24.67 1.50 5.00 3.64 , 1.42
5 0.24 0.06 0.18 0.45 , 0.85 3.00 5.00 2.05 I 0.31
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8 0.97 0.22 0.75 0.45 3.44 0.50 5.00 1,47 0.80
.. . _
7 .0.61 0 14 0.47 0.45 ' 2.13 3.00 5.00 2.57 I 0.46
8 1.09 . 0.25 0.84 0.45 I 3.10 1.20 5.00 1.99 0.64
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