SW3140601_Supplement EZ Cover Page _9/10/2019

SUPPLEMENT-EZ COVER PAGE
CORMSLOADEL,
PROJECT INFORMATION
1 Project Name
2 Project Area
3 Coastal Wetland Area ac
4 Surface Water Area (ac)
Courtyards at Marvin
5 Is this project High or Low Density? High
6 Does this project use an off -site SCM? No
COMPLIANCE WITH 02H .1003(4)
7
Width of vegetated setbacks providedjfeet)
8
Will the vegetated setback remain _ve etated?
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 _jlnfiltration
System ____
0
12
___
Bioretention Cell _ _
0
13
Wet Pond
1
14
Stormwater Welland A
0
15
-_
Permeable Pavement
0
16
Sand Filter
0
17
1 Rainwater Harvesting RWH
0
18
JGreen _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 JSilva
Cell
0
25
Ba�lter _
0
26 I
Filterra
0
FORMS LOADED
DESIGNER CERTIFICATION
27
1 Name and Title: _ _
Brian Rossi, PE
28
Or anization:
EMH&T
29
Street address:
301 McCullough Dr
30
_
City, State, Zip: _
Charlotte, NC 28262
31
Phone numbers : -___
704-548-0333
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.
C A
ESS/p
_ • � SEAL 9l
045526
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Signature of Designer
ne ,B l9
Date

DRAINAGE AREAS
1 Is this a high density project? _ Yes
2 If so, number of drainage areas/SCMs 1
Is all/partof this project subject to previous rule
3 versions? No
FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
1
4
Type of SCM
Wet Pond
5
Total BUA in proiect (sq ft
328780 Sf
6
New BUA on subdivided lots (subject to permitting)
(sq ft
328780 Sf
7
New BUA outside of subdivided lots (subject to
permitting (soSf
8
Offsite - total area (sq ft
Sf
9
Offsite BUA (sq ft
Sf
10
Breakdown of new BUA outside subdivided lots:
- Parkinsl (sq ft
900 Sf
- Sidewalk (sq ft
17015 Sf
- Roof (sq ft
241417 Sf
- Roadway s ft
69448 Sf
- Future (sq ft
Sf
- Other, please specify in the comment box
below (sq ft
Sf
11
New infiltrating permeable pavement on
subdivided lots (sq ft
Sf
12
New infiltrating permeable pavement outside of
subdivided lots (sq ft
Sf
Sf
13permitting)
Exisitng Bl1A that will remain (not subject to
(sq ft)
14
_
Existing BUA that is already permitted (sq ft
Sf
15
Existing BUA that will be removed (sq ft
Sf
16
Percent BUA
0.3
17
Design storm inches
1 In
18
Desi n volu_me of SCM cu ft
61169 Cf
19
Calculation method for design volume
Rational
ADDITIONAL
INFORMATION
20 1drainage
Please use this space to provide any additional information about the
area(s):

WET POND
1 Drainage area number 1
17­1­2[besign volume of SCM (cu ft) 61169 cf
,GENERAL MDC FROM 02H 1050
_3
Is the SCM sized to treat the SW from all surfaces at build -out?
Yes
4
Is the SCM located away from contaminated soils?
Yes
_ 5
What are the side slopes of the SCM (H:V)?
3:1
6
Does the SCM have retaining walls, gabion walls or other engineered
side slopes?
No
7
Are the inlets, outlets, and receiving stream protected from erosion
(10-year storm)?
Yes
8
Is there an overflow or bypass for inflow volume in excess of the
design volume?
Yes
9
What is the method for dewatering the SCM for maintenance?
Drawdown Orifice
10
If applicable, will the SCM be cleaned out after construction?
Yes
11
Does the maintenance access comply with General MDC (8)?
Yes
12
Does the drainage easement comply with General MDC (9)?
Yes
13
If the SCM is on a single family lot, does (will?) the plat comply with
General MDC (10)?
No
14
Is there an O&M Agreement that complies with General MDC (11)?
Yes
15
Is there an O&M Plan that complies with General MDC (12)?
Yes
16
Does the SCM follow the device specific MDC?
I Yes
_ 17
Was the SCM designed by an NC licensed professional?
MDC FROM 02H .1053
Method used
Yes
SA/DA
WET POND
18
19
Has a stage/storage table been provided in the calculations?
Yes
20
Elevation of the excavated main pool depth (bottom of sediment
removal) (fmsl)
582.00
21
Elevation of the main pool bottom -(top of sediment removal) (fmsl)
581.00
22
Elevation of the bottom of the vegetated shelf (fmsl)
589.00
23
Elevation of the permanent pool (fmsl)
589.50
24
Elevation of the top of the vegetated shelf (fmsl)
590.00
25
Elevation of the temporary pool (fmsl)
591.50
26
Surface area of the main permanent pool (square feet)
25475:1
27
Vol ume of the main permanent pool (cubic feet)
175739 cf
28
Average depth of the main pool (feet)
6.00 ft
29
Average depth equation used
Equation 2
30
if using equation 3, main pool perimeter (feet)
31
If using equation 3, width of submerged veg. shelf (feet)
32
Volume of the forebay (cubic feet)
29875 cf
33
Is this 15-20% of the volume in the main pool?
Yes
34
Clean -out depth for forebay (inches)
6 in
35
Design volume of SCM (cu ft)
160539 cf
36
Is the outlet an orifice or a weir?
Orifice
37
efi
If orifice, orice diameter (inches)
4 in
38
If weir, weir height (inches)
39
If weir, weir length (inches)
40
Drawdown time for the temporary pool (days)
3
41
Are the inlet(s) and outlet located in a manner that avoids short-
circuiting?
Yes
42
Are berms or baffles provided to improve the flow path?
Yes
43
Depth of forebay at entrance (inches)
48 in
44
Depth of forebay at exit (inches)
48 in
45
Does water flow out of the forebay in a non -erosive manner?
Yes
46
Width of the vegetated shelf (feet)
loft
47
Slope of vegetated shelf (H:V)
10:1
48
_
Does the orifice drawdown from below the top surface_ of the
permanent pool?
Yes
49
Does the pond minimize impacts to the receiving channel from the 1-
yr, 24-hr storm?
Yes
50
Are fountains proposed? (If Y, please provide documentation that
MDC(9) is met.)
Yes
51
Is a trash rack or other device provided to protect the outlet system?
No
52
Are the dam and embankment planted in non -clumping turf grass?
Yes
53
Species of turf that will be used on the dam and embankment
54
Has a planting plan been provided for the vegetated shelf?
Yes
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
55 wet pond(s):
Wet Pond 3
4:19 PM 8/27/2019