SW4070701_Supplement-EZ Form_20191030

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1
Project Name
Echota IV The Summit at Echota
2
Project Area ac
46.73
3
_
Coastal Wetland Area (ac)
0
4
Surface Water Area ac
0
5
Is this project High or Low Density?
Low
6 1
Does this project use an off -site SCM?
No
COMPLIANCE WITH 02H .1003(4)
7
Width of vegetated setbacks provided feet
280' and greater
8
Will the vegetated setback remain vegetated?
Yes
9
Is BUA other that as listed in .1003 4 c-d out of the setback?
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 (IS-FS)
0
20
Disconnected Impervious Surface (DIS)
0
21
Treatment Swale
0
22
Dry Pond
0
23
StormF(Iter
_
0
24
Silva Cell
_
Y 0
25
BayflIter
0
26
Filterra
0 i
FORMS LOADED
DESIGNER CERTIFICATION
27
Name and Title:
J. Meliski, PE
28
Organization:
McGill Associates
29
Street address:
55 Broad Street
30
City, State, Zip:
Asheville, NC 28801
31
Phone numbers :
828-252-0575
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 knowiedge 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
•4`°r��1 (i�'Rp
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Signature of Designer
Date

DRAINAGE AREAS'
1 Is this a high density project? No
2 If so, number of drainage areas/SCMs 1
Is all/part of this project subject to previous rule
3 versions? Yes
FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
4
Type of SCM
N/A
5
Total BUA in project (sq ft
333087 sf
6
New BUA on subdivided lots (subject to permitting)
(sq ft
N/A
7permitting)
New BUA outside of subdivided lots (subject to
s
N/A
8
Offsite - total area (sq ft
N/A
9
Offsite BUA (sq ft
N/A
10
Breakdown of new BUA outside subdivided lots:
Parking (sq ft
137268 sf
Sidewalk (sq ft
14427 sf
Roof (sq ft
129488 sf
- Roadway s ft
51904 sf
- Future (sq ft
sf
- Other, please specify in the comment box
below (sq ft
11
New infiltrating permeable pavement on
subdivided lots (sq ft
N/A
12
New infiltrating permeable pavement outside of
subdivided lots (sq ft
N/A
13
Exisitng BUA that will remain (not subject to
ermitting) (sq ft
N/A
14
Existing BUA that is already permitted (sq ft
1454933 sf
15
Existing BUA that will be removed (sq ft
sf
16
Percent BUA
12%
17
Design storm inches
in
18
Design volume of SCM cu ft
N/A
19
Calculation method for design volume
N/A
ADDITIONAL
INFORMATION
20
Please use this space to provide any additional information about the
drainage area(s):
Echota IV BUA will be on the ridge.

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? a s r,
3 (o Gj S
6
Are curb outlet swales proposed?
Yes
7
Maximum longitudinal slope of curb outlet swale(s) (%)
13%
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)
5 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
15
1 Please use this space to provide any additional information about this low density project:
Swale
#
Drainage
Area
ac
BUA
(ac)
Pervious
area
ac
C
Q
(cfs)
Slope
(%)
V,,,°w
(fps)
V,�°,i
(fps)
Flow depth (ft)
1
0,
0 . QL5
Q,aL4
2
C - 5;CJ
61 Ll 5
, (
8
3.95
`i.
3
.2O
o
. Cr
`i
(o
4
0,10
O (C)
8
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21