SW6230103_Supplement-EZ Form_20231020

SUPPLEMENT-EZ COVER PAGE
ORMS LOADI
PROJECT INFORMATION
1 Project Name Carter Farms Subdivision-Phase 1
2 Project Area ac 10
3 Coastal Wetland Area ac
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)
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 1 Is streambank stabilization proposed on this project? No
NUMBER AND TYPE OF SCMs:
11 Infiltration S stem 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
Level Spreader-Filter Stri LS-FS 0
r2322
Disconnected Impervious Surface DIS 0
Treatment Swale 0
D Pond 0
StormFilter 0
24 Silva Cell 0
25 Ba filter 0
26 IFilterra 0
FORMS LOADED
DESIGNER CERTIFICATION
27 Name and Title: Mike D.Averette PE
28 Or anization: Averette Engineering Co.,P.A.
29 Street address: 712 E.Lake Ridge Road
30 City,State,Zip: Raeford,NC 28376
31 Phone numbers : 910 488-5656
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
Signature of Designer
07/20/23
Seal Date

DRAINAGE AREAS
1 Is this a high density project? No
2 If so,number of drainage areas/SCMs 0
3 Does this oroiect have low densit areas? Yes
4 If so number of low 4-ify drainage areas 1
Is all/part of this project subject to previous rule
5 versions? No
FORMS LOADED
DRAINAGE AREA INFORMATION Entire Site LID 1
4 Type of SCM
5 Total drainage area(sq ft 435600 435600
6 Onsite drainage area(sq ft 435600 435600
7 Offsite drainage area(sq ft
8 Total BUA in project(sq ft 104107 sf 104107 sf
New BUA on subdivided lots(subject to
9 ermitting)(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 s 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 ermitting)(sq ft
16 lExistina BUA that is already ermitted (sq ft
17 Existing BUA that will be removed(sq ft
18 Percent BUA 24% 24%
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
DESIGN REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 021-1.1003
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 1 Maximum velocity in the vegetated conveyances during the 10-year storm? 3.97
6 JAre curb outlet swales proposed? Yes
7 Maximum longitudinal slope of curb outlet swale(s)(%) 0
8 Bottom width of curb outlet swale(s)(feet) 4 It
9 Maximum side slope of curb outlet swale(s)(H:V) 3:1
10 Minimum length of curb outlet swale(s)(feet) 858 It
11 Are treatment swales used instead of curb outlet swales? No
12 Is stormwater released at the edge of the setback as dispersed flow? No
13 Have stormwater outlets been designed to prevent downslope erosion? Yes
14 Are variations to rule.1003 proposed? No
ADDITIONAL INFORMATION
15 JPlease use this space to provide any additional information about this low density project:
Level Spreader 10-yr discharge=0.74 cfs at 044 fps
'BUA&Pervious areas are for the swale drainage areas only the are portion of Swale 1 areas
Swale V—
Drainage BUA Pervious Q Slope V,,,o,,, , Flow depth
# Area (ac) area C (cfs) (/) (fps) (fps) (ft)
ac ac
1 18.40 2.39 16.01 0.35 38.12 0.00 5.00 225 1.86
2 2.40 0.31' 2.09' 0.35 6.40 1.60 5.00 3.62 0.35
3 2.10 027" 1.83' 0.35 6.53 1.00 5.00 3.49 0.79
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