SW4240906_Supplement-EZ Form_20240924

SUPPLEMENT-EZ COVER PAGE
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PROJECT INFORMATION
1 Project Name _ The Ridge Event Venue
2 Project Area(ac) 18.25 AC
3 Coastal Wetland Area(ac) _ 0 —
4 Surface Water Area(ac) 0.44 AC
5 Is this project High or Low Density? Low
6 Does this project use an off-site SCM? I No
COMPLIANCE WITH 02H.1003(4)
7 Width of vegetated setbacks provided(feet) _ 50
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)? N/A_ _
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
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DESIGNER CERTIFICATION
27 Name and Title: Andrew Christ,PE _
28 Organization: FEI Civil Engineers and Land Surveyors
29 Street address: _ _ 8518 Triad Drive
30 City,State,Zip: I _ Colfax,NC 27235
31 Phone number(s): 336-544-6438
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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DRAINAGE AREAS
1 +Is this a high density project? No —2 I 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 1
Is all/part of this project subject to previous rule
5 versions? No
I FORMS LOADED
DRAINAGE AREA INFORMATION Entire Site LD 1
4 JType of SCM None None
5 Total drainage area(sq ft) 794,970 794,970
6 Onsite drainage area(sq ft) 794,970 794,970
7 Offsite drainage area(sq ft) 0 sf 0 sf
8 Total BUA in project(sq ft) 74787 sf 74787 sf
New BUA on subdivided lots(subject to permitting)
9 (sq ft) 0sf 0sf ,
New BUA not on subdivided lots(subject to
10 permitting)(sf) 74787 sf 74787 sf
11 Offsite BUA(sq ft) 0 sf 0 sf
12 Breakdown of new BUA not on subdivided lots:
-Parking(sq ft) 10005 sf 10005 sf
-Sidewalk(sq ft) 5995 sf 5995 sf
-Roof(sq ft) 7359 sf 7359 sf
-Roadway(sq ft) _ 40228 sf 40228 sf
-Future(sq ft) 0 sf _ 0 sf
-Other,please specify in the comment box
below(sq ft)
New infiltrating permeable pavement on
13 subdivided lots(sq ft) 0 sf 0 sf
New infiltrating permeable pavement not on
14 subdivided lots(sq ft) 0 sf 0 sf
Existing BUA that will remain(not subject to
15 permitting)(sq ft) 8935 sf 8935 sf
16 Existing BUA that is already permitted(sq ft) 0 sf 0 sf
17 Existing BUA that will be removed(sq ft) 11200 sf 11200 sf
18 Percent BUA 9.8% _ 9.8%
19 Design storm(inches) n/a n/a
20 _,Design volume of SCM(cu ft) n/a _ n/a
21 I Calculation method for design volume n/a n/a
ADDITIONAL INFORMATION _
Please use this space to provide any additional information about the
22 drainage area(s):

LOW DENSITY
DESIGN REO,UIREMENTS FOR LOW DENSITY PROJECTS FROM 02H.1003
1 Is project below density thresholds set forth in the applicable stormwater rule? i 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 to 1
5 Maximum velocity in the vegetated conveyances during the 10-year storm? 5
6 Are curb outlet swales proposed? No
7 Maximum longitudinal slope of curb outlet swale(s)(%)
8 Bottom width of curb outlet swale(s)(feet)
9 Maximum side slope of curb outlet swale(s)(H:V)
10 Minimum length of curb outlet swale(s)(feet)
11 Are treatment swales used instead of curb outlet swales?
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? I No
ADDITIONAL INFORMATION
----....,
15 Please use this space to provide any additional information about this low density project:
Proposed use requires limited slope along the pavement surface provided for vehicular movement and repair.Site has been
designed to utilize the least amout of storm sewer to the maximum extents possible Additional offsite drainage from the southern 1
adjacent property is bypassed with the use of a culvert. _ _
Drainage Pervious
Swale Area BUA area C Q Slope V.0,N, V.i. Flow depth
# lac) (ac) (ac) (cfs) (%) (fps) (fPs) (ft)
` 1 0 78 0.15 0.63 0.42 1.79 3.10% I 8.00 2.00 0.30
2 0 35 0.31 0.04 I 0.37 0.71 1.50% 8.00 1.40 0.30
_ 3 0.34 0.10 0.24 0.48 0.90 3.00% 1 8.00 2.90 0.50
4 0 68 0.68 0.00 0.90 3.39 9.00% I 8.00 I 3.40 0.30
5 1.27 0,77 0.50 0.66 r 4.61 9.00% 8.00 3.60 I 0.33
6 0.54 0.54 0.00 0.90 2.69 I 1.50% I 8.00 2.40 0.65
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