SW6240708_Supplement-EZ Form_20241023

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name Robert's Grove Phase 2
2 Project Area(ac) 67.19
3 Coastal Wetland Area(ac) 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(
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: Michael D.Averette PE
28 Organization: Averette Engineering Co.,P.A.
29 Street address: 712 E Lake Ridge Rd
30 City,State,Zip: Raeford,NC 28376
31 Phone number(s): 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
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
5 Total drainage area(sq ft) 2,926,796.40 2926796.4
6 Onsite drainage area(sq ft) 2,926,796.40 2926796.4
7 Offsite drainage area(sq ft) 0 _ 0
8 Total BUA in project(sq ft) 196236 sf 196236 sf
New BUA on subdivided lots(subject to permitting)
9 (sq ft) 122500 sf 122500 sf
New BUA not on subdivided lots(subject to
10 permitting)(sf) 73736 sf 73736 sf
11 Offsite BUA(sq ft)
12 Breakdown of new BUA not on subdivided lots:
-Parking(sq ft)
-Sidewalk(sq ft) 10764 sf 10764 sf
-Roof(sq ft)
-Roadway(sq ft) 62973 sf 62973 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 7% 7%
19 Design storm(inches)
20 Design volume of SCM(cu ft)
21 Calculation method for design volume
ADDITIONAL INFORMATIO
Please use this space to provide any additional information about the
22 drainage area(s):

LOW DENSITY
(DESIGN 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? 1.84
6 Are curb outlet swales proposed? Yes
7 Maximum longitudinal slope of curb outlet swale(s)(%) 1%
8 Bottom width of curb outlet swale(s)(feet) 3 ft
9 Maximum side slope of curb outlet swale(s)(H:V) 3:1
10 Minimum length of curb outlet swale(s)(feet) 2600 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 proposed? No
ADDITIONAL INFORMATION M=I IME �
15 Please use this space to provide any additional information about this low density project:
Swale Drainage BUA Pervious Q Slope Vail,,,, Vaauai Flow depth
Area area
(ac) C (cfs) (%) (fps) (fps) (ft)
(ac) (ac)
1 21.68 4.50 17.18 0.35 22.08 0.10 4.50 2.12 1.43
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