SW6230806_Supplement-EZ Form_20230905

3UPPLEMENT-EZ COVER PAGE
FORM5LOADEC I
ROJECT INFORMATION
1 Project Name _ Brookwood Subdivision Phase 4
2 P 'ect Area - 55.46
3 Coastal Wetland Area(ao)._ 0
4 Surface Water Area(ac) - 0
_5 Is this project High or Low Density? Low
6 Does this project use an off-site SCM? No
COMPLIANCE WITH 02H.1003(4) ,t
7 Width of vegetated setbacks provided ifeet}
8 Will the vegetated setback remain vegetated?
9 if BUA is proposed in the setback,does it meet NCAC 02H.100314)1c-dr WA
10 Is streambank stabilization proposed on this project? NO
UMBER AND TYPE OF SCMs:
11 Infiltration System
12 Bioretention Cell
13 Wet Pond
14 Storm water Wetland f
15 Permeable Pavement
16 I Sand Filter I-
_ _ _
17 Rainwater Harvesting(RWH) _ Y
18 Green Roof_ I
19 iLevelSpreader-Filter Strip(LS-FS)
20 _Disconnected Impervious Su_rface_iDISj
21 Treatment Swale
22 Dry Pond
23 StormFilter
24 !Silva CeN
25 .Silva
266 Filterra
I RAMS WADE!?
SIGNER CERTIFICATION
27 Name and Title: Jackson D.Maples Project Manager
28 _Organization. LKC Engineering, PLLC
29 Street address: 140 Aqua Shed Ct. _
30- City.State,Zip: Aberdeen NC,28315
31 Phone number(s): 910-420-1437
32 Email jackson©Ikcengineering.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
,1p111 I111IIg,
Designer %.�l�1 f A i,,t.,
s T-
a SEAL � 7 _
= 056498 = Sign a of Desi
CO
y-',�C� �GINe���v
Date ll
Seal

DRAINAGE AREAS
1 ,Is this a high density project? No
2 If so,number of drainage areas/SCMs 0
3 Does this project have low density areas? Yes _
4 If so.number of low density drainage areas 1
Is alllpart of this project subject to previous rule
5 versions? No
iORMSIOADt0
INAGE AREA INFORMATION Entire Site LD 1
4 Type of SCM T _
5 Total drainage area(sq ft) 2,511.233 2,511233
6 Onsite drainage area(sq ft) 2,420,193 2,420,193
7 Offslte drainage area(sq ft) 91,040 91040
8 Total BUA in project(sq ft) 289674 sf 289674 st
New BUA on subdivided lots(subject to permitting)
9 (sq ft) _ 181209 sf 181209 sf
New BUA not on subdivided lots(subject to
0 permitting)(st) __ 81021 sf 81021 sf
1 Otfsite BUA(sq ft) 27442 sf 27442 sf
2 Breakdown of new BUA not on subdivided lots:
-Parking(sq ft) _
-Sidewalk(sq ft)
-Roof(sq fl) 181209 sf 181209 sf _
-Roadway(sq fly - 81021 sf 81021 sf
-Future(sq ft)
-Other,please specify in the comment box
below(sq ft)
New infiltrating permeable pavement on
3 subdivided lots(sq ft)
New infiltrating permeable pavement not on
4 subdivided lots ft)_
Existing BUA that will remain(not subject to
5 permitting)(sq ft)
6 Existing BUA that is already permitted(sq ft)
7 Existing BUA that will be removed(sq ft)
8 Percent BUA 12% 12%
9 Design storm(inches) 6.5 in 6.5 in
!0 Design volume of SCM{cu ft)
Calculation method for design volume
bDI ONAL INFORMATION -14111111101111- --
Please use this space to provide any additional information about the
!2 drainage area(s):
he site will use conveyance swales for runoff from the roadway and
spersed flow for the individual lots.

LOW DENSITY
DESIGN REQUIREMENTS FOR LOW DENSITY PROJECTS MOM 02H.1003
1 Is project below density thresholds set forth in the applicable stormwater rule? Yes
2 Does project maximize dispersed flow and minimize channelization of flov✓T 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? 4.35
6 Are curb outlet swales proposed? No
7 Maximum longitudinal slope of curb outlet swale(s)(%) NIA
8 Bottom width of curb outlet swale(s)(feet) NIA
9 Maximum side slope of curb outlet swale(s)(H:V) N/A
10 Minimum length of curb outlet swale(s)(feet) N/A
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
13 Have stormwater outlets been designed to prevent downslope erosion? Yes
14 Are variations to nile.1003 proposed? No
ADDITIONAL INFORMATION
15 Please use this space to provide any additional information about this low density project:
Swale Drainage DUA Pervious 0 V v
Slope ,.,, ,,,,,,, Flow depth
Area (so) area (cfa) (X) (fps) (fps) (It)
(act (ac)
2
3
4
5
5
7 — -
8
9
10
!1
12
13
14 _15
18
17
18
19
20
21
22
23
24
26
26
27
28
29
30