SW6230806_Supplement-EZ Form_20240131

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tOJECT INFORMATION
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1 Proiect Name Brookwood Subdivision Phase 4
2 Project Areaiac) 53.37 -- _,_ _
3 Coastal Wetland Area(act 0
4 Surface Water Area(ac) 0.98
5 Is this project High or Low Density? Low
6,Does this project use an off-site SCM? No
IMPLIANCE WITH 02H.1003(4)
7 Width of vegetated setbacks provided(feet) 30
8 Will the vegetated setback remain vegetated? __ ___.__ Yes __ _ _W_._____._.
9 If BUA*proposed in the setback does it meet NCAC 02H 1003(4Kt-d)? N/A
10 Is streambank stabilization proposed on this project? No
IMBER AND TYPE OF SCMs:
11 Infiltration System
12 Bioretention Cell
13 Wet Pond
14 Stormwater Wetland
15 Permeable Pavement
16 •Sand Filter
17 Rainwater HarvestingjRWHJ _ �
18 Green Roof
19 Level Spreader-Filter Str p Q S-FS) _ __
?0 Disconnected Impervious Surfacep1S2
21 Treatment Swale
?2 Dry_Pond -
?3 StormFilter
?4 ;Silva Cell
?5 .Bayfilter _ - -
?6 Filterra
FORMS LOADED
SIGNER CERTIFICATION
?7 Name and Title: Jackson D.Maples,Protect Manager
28 Organization: LKC Engineering„PLLC _ __-
?9 Street address 140 Aqua Shed Ct.
30 Cily,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 nfom,aton provided here
pesfgner
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us this a high density project? f No
2 If so,number of drainage areaslSCMs 0
3 Does this project have low density areas? Yes
4 if so,number of low density drainage areas 1
Is alUpart of this project subject to previous rule
5 versions? No
FORMS LOAUI-G
tAINAGE AREA INFORMATION Entire Site LD 1
4 Type of SCM
5 Total drainage area(sq ft) 2,324,797 _ 2.324.797
6 Onsite drainage area(sq ft) 2,324,797 2,324;797
7 Offsite drainage area(sq ft) N/A N/A
8 Total BUA in project(sq ft) N/A N/A __
New BUA on subdivided lots(subject to
9 permitting)(sq ft) N/A N/A
New BUA not on subdivided lots(subject to
0 permitting)(sf) 81021 sf 81021 sf
1 Offsite BUA(sq ft)
2 Breakdown of new BUA not on subdivided lots:
-Parking(sq ft)
-Sidewalk(sq ft)
-Roof(sgft)
-Roadway(sq ft) 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(sq ft) _
Existing BUA that will remain(not subject to
5 permitting)(sq ft)
6 Existing BUA that is already permitted(sqi
7 Existing BUA that will be removed(sq ft)
8 Percent BUA <1 du/ac <1 du/ac
9 Design storm(Inches) 6.5_in_
_ 6.5 in
0 Design volume of SCM(cu fl)
1 Calculation method for deslin volume
IDITIONAL INFORMATION
Please use this space to provide any additional information about the
2 !drainage area(s):
e site will use conveyance swales for runoff from the roadway and
persed flow for the individual lots.

LOW DENSITY
DESIGN REUVIREMENTS FOS LQW DBIYPROIEL7SFROMO
1 Is project below density thresholds set forth in the applicable stormwater rule? Yes
2 Does project maximize dispersed flow and minimize channelization of flow? Yes
3 Has the use of piping been minimizedper 1003(2)(c)? Yes
�4 Side slopes of the vegetated conveyances iH•Vi 3 sf
5 Maximum velocity in the vejetated conve1rances during the 10-year storm? 5.3
6 Are curb outlet swales proposed? No
_
7 Maximum longitudinal slope of curb outlet swale(s)(14) N/A
8 Bottom width of curb outlet swale(s)(feet) N/A
9 Maximum side slope of curb outlet swale(s)(H'V) N/A
10 Minimum lentil%of curb outlet swaeel s i(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 slormwater 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 protect
Drainage Pervious
Swale BUA 0 Slope V. Y....., Flow depth
4 Area (cc) WWI C (cis) (%) ((ps) ((Ps) (tt)
fact fact
1 1.58 0.16 1.43 0.27 4.20 1.50 2.59 2.59 0.34
2 2.20 0.220 1.98 0.24 5.83 1.50 2.84 2.84 0.40
3 0.25 0.101 0.15 0.49 1.08 1.50 1.79 1.79 0.18
4 0.69 0.07 0.62 0.27 1.82 1.50 1.96 1.96 0.21
6 0.43 0.17 0.28 0.49 1.83 2.68 2.47 2.47 0.19
6 0.77 0.310 0.46 0.49 3.33 2.68 3 03 3.03 0.27
7 0.17 0.067 0.10 0.49 0.72 2.00 1.53 1.53 0.11
8 0.13 0.04 0.08 0.44 0.49 2.00 1.44 1.44 0.10
9 0.53 0.211 0.32 0.49 2.26 2.00 2.38 2.38 0.23
10 0.89 0.36 0.53 0.49 3.83 2.00 2.73 2.73 0.29
11 0.17 0.088 0.10 0.49 0.73 3.39 2.60 2.60 0.32
12 0.77 0.154 0.62 0.34 2.32 3.39 3.41 3.41 0.48
13 1.33 0.133 1.20 _ 0.24 3.53 2.22 3.24 3.24 _ 0.61
14 1.51 0.604 0.91 0.49 6.49 5.59 5.30 5.30 0.64
15 4.27 0.641 3.63 0.28 11.31 2.00 4.16 4.16 0.96
16 2.43 1.215 1.21 0.56 11.91 3.19 5.03 5 03 0.90
17 0.57 0.057 0.51 0.24 1.50 1.00 1.93 1.93 0.51
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