HomeMy WebLinkAboutSW3210803_Supplement-EZ Form_20211012SUPPLEMENT-EZ COVER PAGE
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PROJECT INFORMATION
1 iProject Name
. , m.....
Belle Mar Subdivision
2 Project Area (ac)
11.65
3 Coastal Wetland Area (ac)
p
4 Surface Water Area (ac)
0.37
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
f _ 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
)ESIGNER CERTIFICATION
27
Name and Title
Patrick Needham, PE
28
Organization;
McKim &Creed, Inc.
29
'Street address:
j 8020 Tower Point Dr,
30
City, State, Zip
_ Charlotte, NC 28227
31
I'Phone number(s):
704-841-2588
32
Emaik
pneedham(aD_mckimcreed.com
Ceetifucatbn Statempa
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.
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ter
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Signature of Designee - g .......,... m..
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061/10/.7,0.Z
.Date............................................................�.) � -_-----
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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
Fj2EMLI..aaLFP
DRAINAGE AREA INFORMATION
Entire Site
LD 1
4
Type of SCM
N/A
5
Total drainage area (sq ft
507474
6
Onsite drainage area (sq ft
507474
7
Offsite drainage area (sq ft)
N/A
8
Total BUA in project (sq ft)
107920 sf
New BUA on subdivided lots (subject to
9
permitting) (sq ft)
84450 sf
New BUA not on subdivided lots (subject to
10
permitting) (sf)
23470 sf
11
Offsite BUA (sq ft)
Bre..kd.own new
......1.2
...9! ...n.ot ...o.n ...su.b.d..i.v.....i.d.....e....d.......l..o....t..s.....:.....................................................................................................................................................
- Parkin s ft
3120 sf
Sidewalks ft
R22! (sq ft
Roadways ft
20350 sf
- Futures 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
permittin s ft
16
...........................g)....(...........)..............................................................................................................................................................................................................................................................
Existing BUA that is already ermitted (sq ft
17
Existing BUA that will be removed (sq ft
18
Percent BUA
21%
...............................................................................................................................................................................................................................................................................................................................................
19
Resign storm inches
N/A
20
Desi n volume of SCM cu ft
N/A
21
Calculation method for design volume
N/A
ADDITIONAL INFORMATION
Please use this ace sp.to...provid.e..any ......additional information about the
p
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)
31
5
Maximum velocity in the vegetated conveyances during the 10-year storm?
5.43
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 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
15 Please use°°tnls Y space to provide
an additional information about this low density p p Y Y
Swale numbers below correspond to permanent ditch numbers as listed in the attached stormwater report
Drainage
Pervious
BUA
Q
Slope
Va„-
V.1-1
Flow depth
Area
(ac)
area
C
(cfs)
( % )
(fps)
(fPs)
(ft)
ac
ac
T
0.91
0.27
0.64
0.45
3.09
5.00
5.50
3.86
0.38
.................................................................................................................................................................................................................................................1.40
0.22
1.18
0.45
4.76
7.10
5.50
4.61
0.44
0.58
0.17
0.41
0.45
1.97
1.105.50
1.19
0.60
4
.............0...................................0...................................0...................................0......................................................................................................................................................................................................................
2.27
0.43
1.84
0.45
7.71
3.80
5.50
5.43
0.54
5
0.14
0.06
0.08
0.60
0.63
5.50
5.50
1.59
0.23
..................................................................................................................................................................................................................................................................................................................................................................................
6
______7
0.21
0.09
0.12
0.60
0.95
11.10
5.50
3.50
0.18
0.09
0.02
0.07
0.60
0.41
8.30
5.50
1.62
0.17
..................................................................................................................................................................................................................................................................................................................................................................................
8
0.17
0.08
0.09
0.60
0.77
5.50
5.50
1.67
0.26
9
4.11
0.51
1.92
0.50
15.52
0.60
5.50
2.65
1.24
10
1.64
0.29
1.35
0.45
5.57
1.00
5.50
2.47
0.72
11
12
13
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