SW4070701_Supplement-EZ Form_20200213

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 J Project Name Echota IV The Summit at Echota
2
Project Area (ac)
T 46,73 +7.'-/1 = .54 15
3
Coastal Welland Areaac)
0
4
Surface Water Area act_____
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
280' and greater
8
Will the vegetated setback remain ve etated?
Yes
9
Is BU_A other that as listed in .1003(4)(c-d out of the setback?
Yes
10
Is slreambank stabilization proposed on this project?
No
NUMBER AND TYPE OF SCMs:
11 1 Infiltration System 0
12 113ioretention
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 L( S-FS)
0
20
Disconnected Impervious Surface (DIS)
0
21
_
Treatment Swale
0
22
DryPond
0
23__
StormFilter_
0
24
_
Silva Cell
0
25
26
Bayfilter
Filterra� _
0
0
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, INC 28801
31
Phone number(s):
828-252-0575
32
Email:
j.meliski@mcgillassociates-com
;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
ilhat the engineering plans, specifications, operation and maintenance agreements and other supporting information are consistent
jwith the information provided here.
s�=; QQCv-ESS76
SEAL
'9=
029887
10
Seal
/1�'J
Signature of qi6signer
/
Date

DRAINAGE AREAS
1
Is this a high density project?
No
2
If so, number of drainage areas/SCMs
1
3
Is all/part of this project subject to previous rule
versions?
Yes
FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
4
Type of SCM
N/A
5
Total BUA in project (sq ft
278329 sf
6
New BUA on subdivided lots (subject to permitting)
s ft
N/A
7
New BUA outside of subdivided lots (subject to
permitting) (so
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
109162 sf
Sidewalk (sq ft
11571 sf
Roof (sq ft
108656 sf
Roadway s ft
48940 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
Isubdivided lots (sq ft
N/A
13permitting)
Exisitng BUA that will remain (not subject to
s ft
N/A
14
Existing BUA that is already permitted (sq ft
sf
15
Existing BUA that will be removed (sq ft
sf
16
Percent BUA
12%
17
Design storm inches
in
18
1 Design volume of SCM cu ft
N/A
19
lCalculation 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)
2 sf
5
Maximum velocity in the vegetated conveyances during the 10-year storm?
6
Are curb outlet swales proposed?
No
7
Maximum longitudinal slope of curb outlet swale(s) (%)
0%
8
Bottom width of curb outlet swale(s) (feet)
ft
9
Maximum side slope of curb outlet swale(s) (H:V)
:1
10
Minimum length of curb outlet swale(s) (feet)
ft
11
Are treatment swales used instead of curb outlet swales?
Yes
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?
JADDITIONAL INFORMATION
_15 Please use this space to provide any additional information about this low density project:
No
Swales have been designed to the 25 year storm. Seespreadsheet for swale calculations and chart information.
Swale
#
BUSlope A Q
Drainage Pervious i Area
(ac) area C (cfs) (%) I
ac) (ac)I
V
Vaud act-1 Flow depth (ft)
(fps) (fps)
2
--
3
--
4
(
--
5
6
7
----
8
9
10
11
12
13
14
15
16
17
18
19
20
21

Z
3
Y
Y Y
Y Y
Y Y
Y Y
Y Y
Y Y
Y Y Y
0000000000000000
LL.
O
U
Z
� U
Y
Y Y
Y Y
Y Y
Y Y
Y Y
Y Y
Y Y
Y
0 �
0000000000000000
U>
W`°a
0OMn
COOCD
M
6 m
o00000
m
N
Z'
LL
4] li]
M Ln
In
m
Li LO
In In
IA
2
U�
w
000
LnrOOrcpoNr
mm
NO
h0W?
QQaU
min
Qj00
Nc6
yU
J
Q
R
r
CU
w
a-0(L
f%
N
m m
m
0 q
d in
ch r
m O
O N
m
M
c7 N
N N
M-
N'C'
v v
v a
NNE
>
F
W
Z
J
J
w
ZZ
rNm
v �nt1tM
r`m�
�nm
Qy
2
Q
S
(,
U
Momm
c
mmmmmCl)cn
or000000000000
Oel.mg.mmmLOW)Ln�ain
.
.000000000000000
. .
.
.
0
`
�y
MR
c0
M
m
t n m
V; mN
d'OOf�(O
V V
NON
O M
R N
mmmNmNNmm
O m
N
O h
NN
h
m
0
}
0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0
2
2
F-
0
m
2
aH
9
000000000000000
w
❑
❑
uiinm4to000000m0inL
LnfqlLllqlLq
Ui q
Lo
IL
o
W�
h�o
iah�nvcmm�n�iv)v,�nvc�nio
arnm
moan
inN
❑
m
0000000000000000
N
d
rN
N47N
mI�In
m C')N
cO
CD mC7
f�O�
�LL
U
N M
o
o m
O r
c V r
O
r N
U
OOIn000001n
mmhggqNt
to
,rinmll�hv,rnrn
ONcno00
0000000000000000
w
Z
In
Z
Q
W
QQ
OMNI�ORm
"It lt)
N �r
r'-a{
U,
m m
M MM
In N
V
mNNr�
McnR
_❑
U
O O
O o
0 0
0 000000000
U
Q
a4�
Q
=
O W
d'
cn cn
N V'
m9Nmm
r r
r
O O
to
N
min
Cl!
�nm0
N N
in
Cl! r
cnV
r
(n
7 U
o 0
0 0
0
0 0
0
0 0
0 0
0 0
0 0
Q
m Q
a'
On.
OO
:�t00
CNN
OOOOO
N
NO
y
a�J
NCV
00
ACV
".
rri00000.
�
n
cr0l.0.
d
h
w
cA
~
U
II
a
N
J
J
w
2
ONul
rNm
V'cnmhmmOrNmv�nm
V
t0
QZZ
w
U'

}
p
b
w
mmunrnEncnu)rnu)u)u)
0
aW
w
}>-}}}}}}>-}}>-}
W w
w w
w w
w w
w W
w w
W w
}}}
W
WZ
I-
J
z
3rY
OJ
Y Y
Y Y
Y Y
Y Y
Y Y
Y Y
Y Y
Y
w�w
0000000000000
000
Z0
U.
Z
U
Q
2
U
W
Urn
u)r
MNrO�NMO
11
Q
Q
Il
�
U
V
010
V'f0
C7o
coOOf�CM-
—
� o4
cU
T
T
O�
nW.pavco
cR
Qreo
M cq
q
cOq
J
w
Pi
V (h
(7 C7
M O
'V' V
V
("7 (V
IV
('7
rw
0
w
Z
J
J
W
Z
cn
ZQZ
Q[000
W
LL.U'
2—tJl
ZOa
2
C-9
U
C
M
0
M M
0 0
M M
0 0
M M
0 0
M M
0 0
M M
0 0
M M
0 0
M M
O O
M
O
0
0 0
0 0
0 0
0 0
0 0
0 0
O O
O
p
rM't(Mc�
O
W O
N ONO
N
CON
O
N
N
0
}
O
O O
O O
O O
O O
O O
O O
0 0
0
2
F
p
0
m
a�
Q000000000000o
Q000
p
O
O
w
M
p
,n
,n ,n
,n
,n
,n ,n
,n ,n
u� u)
ui6uiMmmmmmm0uiLO
uiuiui
0
0
d
00
u1 ,n
�a0M
u7 (O
u) W
mr
V'MN
LL
N
N N
N M
M N
N
N N
N
M
LO
6000000000060
600
LL
V;
u) V
N
M(00)ln
,t)NM
M
MNr
N U
O
O o
0 0
0 0
0 0
o o
o 0
O .-
O
1
o
U
N
N N
N N
N N
N N
N N
N N
N N
N
0
0 0
0 0
0 O
0 0
0 0
0 0
000
uJ
J
W
Z
w
w0
LnW
MfD
v
w O)rN
O)CO
v rO)
Q¢
S
Q'
p U
NM
0
NO
0 0
��"
0 0
M
0 0
V' NNE
0 0
0 0
0 0
�<OM
O O
O
U
Q
p
W
a
2
Qw
MM
rn°)rOO000000
m
r
000
=
Z
u)�n
OO
CO
MMOOOc
V N
000
Z
,_jJ
o�
01�
f` r
coup
V V
m V'
o1C)l!)
N
u�
Q
U
r
p
ON
II
N
IL
¢
F
�aa
ww
¢�¢¢aaaaa¢.¢a,
mmm
w
Z
w
v}
co
O
w
a
N.-
N
o
r
Z
J
O
J
w
ON
(n
ZO
QO�U❑
W
wC72
—�YJ�
Z0
W
cn
W<
fn
SN
9=Z
Q
Q
w
cO
CD
U