SW6230103_Supplement-EZ Form_20240622

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name Carter Farms Subdivision-Phase 1
2 Project Area(ac) 34.48
3 Coastal Wetland Area(ac) _ 0
4 Surface Water Area(ac) 0.005
5 Is this project High or Low Density? Low
6 Does this project use an off-site SCM? No
COMPLIANCE WITH 02H.1003(4) _7 Width of vegetated setbacks provided(feet) _ 30
8 Will the vegetated setback remain vegetated? Yes
9 If BUA is proposed in the setback,does it meet NCAC 02H.1003(4)(c-d)? Yes
10 Is streambank stabilization proposed on this project? No
NUMBER AND TYPE OF SCMs:
11 Infiltration System 0
12 Bioretention Cell 0
13 Wet Pond 0
14 Stormwater Wetland 0
15 Permeable Pavement 0
16 Sand Filter 0
17 Rainwater Harvesting(RWH) 0
18 Green Roof 0
19 Level Spreader-Filter Strip(LS-FS) 0
20 Disconnected Impervious Surface(DIS) 0
21 Treatment Swale 0
22 Dry Pond 0
23 StormFilter _ 0
24 Silva Cell 0
25 Bayfilter 0
26 Filterra 0
FORMS LOADED
DESIGNER CERTIFICATION
27 Name and Title: Mike D.Averette PE
28 Organization: Averette Engineering Co.,P.A.
29 Street address: 712 E.Lake Ridge Road
30 City,State,Zip: Raeford,NC 28376
31 Phone number(s): [phone]
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.
Designer
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03/18/24
Seal Date

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 all/part of this project subject to previous rule
5 versions? No
FORMS LOADED
DRAINAGE AREA INFORMATION Entire Site LD 1
4 Type of SCM
5Total drainage area(sq ft) _ 1501513 1501513
6 Onsite drainage area(sq ft) 1501513 1501513
7Offsite drainage area(sq ft) _
8 Total BUA in project(sq ft) 104107 sf 104107 sf
New BUA on subdivided lots(subject to permitting)
9(sq ft) 71070 sf 71070 sf
New BUA not on subdivided lots(subject to
10 permitting)(sf) 33037 sf 33037 sf
11 Offsite BUA(sq ft)
12 Breakdown of new BUA not on subdivided lots:
-Parking(sq ft)
-Sidewalk(sq ft) 4415 sf 4415 sf
-Roof(sq ft)
-Roadway(sq ft) 28622 sf 28622 sf
-Future(sq ft)
-Other,please specify in the comment box
below(sq ft)
New infiltrating permeable pavement on
13 subdivided lots(sq ft)
New infiltrating permeable pavement not on
14 subdivided lots(sq ft)
Existing BUA that will remain(not subject to
15 permitting)(sq ft)
16 Existing BUA that is already permitted(sq ft) _
17 Existing BUA that will be removed(sq ft)
18 Percent BUA 0.069 0.069
19 Design storm(inches)
20 Design volume of SCM(cu ft)
21 Calculation method for design volume
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s):

LOW DENSITY
ESIGN REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 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 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? 4.83
6 .Are curb outlet swales proposed? Yes
7 Maximum longitudinal slope of curb outlet swale(s)(%) 0.016
8 Bottom width of curb outlet swale(s)(feet) 4 ft
9 Maximum side slope of curb outlet swale(s)(H:V) 3:1
10 Minimum length of curb outlet swale(s)(feet) 1018 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
13 Have stormwater outlets been designed to prevent downslope erosion? Yes
14 Are variations to rule.1003 ro osed? No
ADDITIONAL INFORMATION
15 Please use this space to provide any additional information about this low density project:
Level Spreader 10-yr discharge=0.74 cfs at 0.44 fps
*flow calculated with Time of concentration due to flow length.
PC#3 is not an curb outlet swale
Swale Drainage BUA Pervious Slope V V
achni Flow depth
Area (ac) (ac) area (ac) O (cfs) (%) (fps) (fps) (ft)
1 18.40 2.39 16.01 0.35 34.26* 0.00 4.50 2.19 1.71
2 5.82 1.50 4.32 0.35 16.07 1.60 5.00 4.83 0.58
3 2.10 0.50 1.60 0.35 5.80 1.00 4.50 3.33 0.76
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