SW3220403_Supplement-EZ Form_20220429

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
:OMPLIANCE WITH 02H .1003(4)
y 7 Width of vegetated setbacks provided feet _.-._. .. 30
8 Will the vegetated setback remain vejqetated? —Yes -. v
9 If BUA Is proposed in the setback, does it meet NCAC 02H.1003(ji" NIA
10 Is streambank stabliization proposed on this project? No
NER CERTIFICATION
Name and Title:
Mason Greeson, PE _
ftanization: _
Landdestn
Street address:
273 North Graham Street
City, state, Zip: _ ... _ .
— _ + Charlotte, NC, 28202 `
Phone numbs r{s)
(704 333-0325
Email- , T -
[e-mail]
I certify, under penalty of law that this Supplement-EZ form and an 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.
,��tttlllJ��
H CAD�ii��
i�.' 01 L . GRE�
Signature of Designer
Date
3 . 14 . zo2z.

DRAINAGE AREAS
1 Is this a high density project?Yee
2 ft so number of drainage areas/SCMe 2
3 Does this waled have low density areas? No
4 If so number of law density drainage areas 0
Is all/part of We project subject to previous rule
5 versions? No
DRAINAGE
AREA INFORMATION
Entire Sfte
1
2
4
Type of 8CM
WET POND
WET POND
5
Total drainage area ft
783208 of
237402 at
w5a sf
6
Onske drainage areas fl
783208 of
237402 of
of
7
Dlfeile drainage area (sq ft
8
T0ta18UA in prolect fl
500B2o of
190035 sf
310785 sf
9
New BUA on subdivided We (subject to
pannittiral (sq ft
407000 sf
143000 sf
264000 sf
10
New BUA not on subdivided lots (subject to
loannittinal (sn
93820 at
47035 of
46785 of
11
Olfshe BUA ft
12
Breakdown of new BUA not on subdivided lots:
Parka ft
Sidawalk (sq ft
27964 sf
14101 of
13993 of
Roof ft
Roadway R
65838 of
32934 of
329M of
Future Isa ft
Other, please specify in the comment box
below ft
13
New infiltrating permeable pavement on
subdivided lots ft
14
New infiltrating permeable pavement not on
subdivided lots lag ft
15
Existing BUA that wiN remain (not subject to
rmittin ft
16
Ex sno l BUA that is already permitted legR
17
Exist] BUA that wiN be removed (sq ft
18
Percent BUA
80
66
19
Design storm inches
0 in
1,0 in
20
Design volume of SCM cu ft
1 7
94 d
21
Calculation method for design volume
POND PACK
POND PACK
ADDITIONAL
tHFORMATION
22
Please use this space to provide any additional Information about the
drainage areas :

WET POND
1
2
Drai area number
15847 d
35975 d
Minimum re uired treatment volume cu ft
3 Is the SCM sized to treat the SW from an surfaces at build -out?
Yes
Yea
4 Is the SCM boated awe from contaminated soils?
_ 5 Whal ere �e side slopes of the SCM {H:V}7 _
6 Does the SCAR have retaining wa11s, gallon walls or other
er�ineared a da aloma7 .--.... ..
We the Inlets, outlets, and receiving stream protected from erosion
7D 1iLmprstom
Is there an overflow or bypass for Inflow volume in excess of the
8 deFlcn volurre?
9 What is the method for dowatering the SCM for maitenance?
10_lf applicableLwill the SCM be cleaned out after construction?
11 boas the maintenance access comply wNh General MDC 18i?
3:1
3:1
No
..... .. ... .' —
Yes
No
Yes
No
Pu erred
No
Pump femsd
Yes
_ _ Yes
Yea
Yes
Yes
12 Does the dra!nW easement comely with General MDC 9 ?
13 If the SCM Is on a single family lot, does (WIP) the plat comply with
I mor, 60)7
14 lis there an OBNI Agreement that complies with General MDC (11)?
15 Is there an O&M Plan that complies with General MDC {12t?
Yea
I NIA
! Yes
Yea
Yes
Yes
Yes
16
Does the SCM follow the device specific MDC? f Yes
Was the SCM doslIlned bi an NC licensed VofessWmii s Yes
Yes
17
Yes
18
siziffia method used _ -
Has a stagaFslorago table been provided in the calculations?
Elevation of the excavated main pool depth (bottom of sediment
moval Ymsl
SAIDA
SAIDA
19
20
—
Yes
_Yes____
883.00
_
` 564.00
589.00
570.00
21
Elevation of the main pool bottom (top of sediment removal) {fmsl)
571.00
676.00
22
Elevation of the botom of the yepMted shell fmsl)
23
Elevation of the parmanard welffmsif _
Elevation of the WOhvfted shelf
Elevation of the tempprafy pool @FmQ
576.00
_ 24
_ 25
577.00Q
577.06
569.28
26
27
28
Surface area of the main permanent pool );srpare feed
Volume of the mal�rrmanent pwl cubic feetj
_
4045 sf
18552 of
1741.1 of . -_
3.56 ft
78734 of
4.24 ft
Ave d of the main pool (feell
Av2ra deph-e4uation used _
I! us w4uadon 3 main rimeter feet
29
30
g uetion 2
31
I! usequation 3 width of subm shell fleet) arve�. {f ) _..-
Volume.afthe forebay (cubic feet
Is tiis 15.20% of the volume In the main pool? — -
32
33
2882 d
16494 d
Yes
Yes
6 In Y
34
Clean -out de for foreba iff2 esj._ _ _
volume of SCM cu N
the outlet an orifice cr a wele? _ _
8 In
35.Design
36'Is
12207 d
_ 28949 _
Orificed_
Orike
37
6 orifice orifice diameter [Inches) __
H weir, weir he Inches
w 1
2.5
38
—
39 If weir, weir le inches
40' Drewdown time for the tempararkpoal Ways
41 Are the Inlet(s) and cutlet located In a manner that avoids short-
4.49
3_75_
Yes
Yes
Yes
42 Are berms or baffles provided to Improve the flow ?
43' Regth of foreba et entrance inches
Yea
12 in.- .. -
8 in
_ 12 In
6 in
44Depvh of forebay at exit Inches
45 Dces or flow out of the forebain a non -erosive manner?
46NWkth of the veyrtated shelf (feet)
Yes
_ yes-
6 ft
6 ft
Does the orifice drowdown from below the top surface of the
rmana.�kMP
46
Yes
Yes
49 Does the pond minimize Impacts to the receiving channel from the 1- Yes Yes
SFratant-.. -._
50 Are fountains proposed? (If Y. please provide documentation that No No
9lamet)-
51 .Is a trash rack or other device provided to protect the outlet system? J Yes Yes
52 rAre the dam and embankment planted In non -dumping turf grass? i Yes Yea
53 Spades of turf that will be used an the dam and embankment ; HYBRID HYBRID
_ BERMUD_A_ BERMUDA
54 Hasa anti. an been provided for the shelf? Yea Yes
ADDITIONAL INFORMATION
Please use this space to provide any additional information about
55-wa��): _ ....
VM paw a 9:37 AM 3/15/2022