SW3221006_Supplement-EZ Form_20221214

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1
Project Name
Cottages at Wingate - Phases 18r 2
2
Project Area ac
136.07
3
Coastal Wetland Area ac
NIA
4
Surface Water Area ac
17.43
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 ve etated setbacks provided feet
NIA
8
Will the vegetated setback remain vegetated?
NIA
9
If BUA is proposed in the setback, does it meet IN CAC 02H.1003 4 c-d ?
NIA
10
Is streambank stabilization proposed on this project?
No
NUMBER AND TYPE OF SCMs:
11
Infiltration System
12
Bioretention Cell
13
Wet Pond
4
14
Storrnwater Wetland
15
Permeable Pavement
16
ISand Filter
17
Rainwater Harvesting (RWH
18
Green Roof
18
Level 5 reader -Filter Strip LS-F5
20
Disconnected Impervious Surface DIS
21
Treatment Swale
22
1 Dry Pond
23
StormFilter
24
Silva Cell
25
Ba titer
26
Filterra
FORMS LOADED
,ESIGNER CERTIFICATION
27 Name and Title: Matthew C. Kirchner, PE
28 Oraanizabon: I Eagle Enaineerina. Inc.
30 Pity. State, Zip: I Indian Trail, NC 28079
31 11121hore number[s]: _ 704-882-4222
32 Email: mkirchneraeagleonline.net
Certlr-ation 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.
CA0
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04 0'\I' /22/2022
Signature of Designer
1 1/22/2022
Date

DRAINAGE AREAS
1
Is this a hi h density project?
Yes
2
If so, number of drainage areas/SCMs
4
3
Does this project have law density areas?
No
4
If so, number of low d ensity d rai n ag a areas
0
5
Is alllpart of this project subject to previous rule
versions?
No
FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
1
2
3
4
4
Type of SCM
Wet Pond
Wet Pond
Wet Pond
Wet Pond
5
Total drainage area (sq ft
1496876
1019236
459674
233461
6
Onsite drainage area (sq ft
1391325
1001463
459674
233461
7
Offsite drainage area (sq ft
105550
17773
0
0
8
Total BUA in project (sq ft
596336 sf
376794 sf
174676 sf
65776 sf
9
New BUA on subdivided lots (subject to permitting)
(sq ft
313609 sf
231322 sf
102733 sf
38692 sf
10permitting)
New BUA not on subdivided lots (subject to
s
256591 sf
145472 sf
71943 sf
27084 sf
11
Offsite BUA (sq ft
26136 sf
sf
sf
sf
12
Breakdown of new BUA not on subdivided lots:
- Parkina (sq ft
98010 sf
56192 sf
26136 sf
10019 sf
- Sidewalk (sq ft
42689 sf
25700 sf
4356 sf
2614 sf
- Roof ft
262231 sf
195149 sf
93654 sf
34M sf
- Roadway ft
167270 sf
99752 sf
50530 sf
18295 sf
- Future (sq ft
sf
sf
sf
sf
- Other, please specify in the comment box
below ft
sf
sf
sf
sf
13
New infltreting permeable pavement on
subdivided lots (sq ft
sf
sf
sf
sf
14
New infiltrating permeable pavement not on
subdivided lots (sq ft
sf
sf
sf
sf
15
Existing BUA that will remain (not subject to
rmittin ft
26136 sf
sf
sf
sf
16
Existing BUA that is already permitted (sq ft
sf
sf
sf
sf
17
EASfinq BUA that will be removed (sq ft
sf
sf
sf
sf
18
Percent BUA
40%
37%
38%
28%
19
Design storm inches
5.3 in
5.3 in
5.3 in
5.3 in
20
Design volume of SC cu ft
358487 cf
221084 of
125985 cf
66373 of
21
Calculation method for design volume
I
Incremental Star.
1 Incremental Stor.
Incremental Stor.
Incremental Star.
ADDITIONAL INFORMATION
22
Please use this space to provide any additional information about the
draina a areas :

WETPOND
r I Drai nane area number
Al 1 A2 1 A3 1 8
3
Is the SCM sized to treat the SW from al surfaces at build -out?
Yes
Yes
Yes
Yes
4
Is the SCM located away from contaminated solls?
Yes
Yes
Yes
Yes
5
What are the side slopes of the SCM H:V
3:1
3:1
3.1
:1
6
Does the SCM have retaining walls, gebion walls or other engineered
side slopes?
No
No
No
No
7
Are the inlets, outlets, and receiving stream protected from erosion
10-year storm)?
Yes
Yes
Yes
Yes
8
Is there an overflow or bypass for inflow volume in excess of the
design volume?
Yes
Yes
Yes
Yes
9
What is the method for dewatering the SCM for maintenance?
Pump referred
Pump referred
Pump referred
Pump referred
10
If applicable, will the SCM be cleaned out after construction?
Yes
Yes
Yes
Yes
11
Does the maintenance access comply with General MDC 8 ?
Yes
Yes
Yes
Yes
12
Does the drainage easement comply with General MDC 9 ?
Yes
Yes
Yes
Yes
13
If the SCM is on a single family lot, does (will?) the plat comply with
General MDC 10 ?
NIA
NIA
NIA
NIA
14
Is there an O&M Agreement that complies with General MDC (11)?
Yes
Yes
Yes
Yes
15
Is there an O&M Plan that com plies with General MDC (12)?
Yes
Yes
Yes
Yes
161
Does the SCM follow the devicespecific MDC?
Yes
Yes
Yes
Yes
17
Was the SCM designed b an NC licensedprofessional?
Yes
Yes
Yes
Yes
FT PoNn
Mnr FRnM n7N .7nS:t
18
Sizing method used
SAIDA
SAIDA
SAIDA
SAIDA
19
Has a sta elstore a table been provided in the calculations?
Yes
Yes
Yes
Yes
20
Elevation of the excavated main pool depth (bottom of sediment
removal) (fmsl
507.00
509.00
527.00
493.00
21
Elevation of the main pool bottom [top of sediment removal] {fmsl)
508.00
510.00
528.00
494.00
22
Elevation of the bottom of the vegetated shelf fmsl
512.00
514.00
532.00
498.00
23
Elevation of the permanent pool fmsl
512.00
514.00
532.00
498.00
24
Elevation of the top of the vegetated shelf fmsl
513.00
515.00
533.00
499.50
25
Elevation of the temporary pool fmsl
513.00
515.00
533.00
499.50
26
Surface area of the main permanent pool (square feet
46581
13399
6786
21494
27
Volume of the main permanent pool cubic feet
169384 cf
36061 of
22362 cf
74916 cf
28
Average depth of the main pool feet
3.60 ft
3.30 ft
3.30 ft
3.50 ft
29
Avers a depth equation used
Equation 2
Equation 2
Equation 2
E uation 2
30
[fusing uation 3, main pool perimeter feet
NIA
NIA
NIA
NIA
31
If using equation 3, width of submerged veg. shelf feet
NIA
NIA
NIA
NIA
32
Volume of the foreba cubic feet
28367 cf
6280 cf
3545 cf
14042 of
33
Is this 15-20% of the volume in the mainpool?
Yes
Yes
Yes
Yes
34
Clean -out depth for forebay inches
12 in
12 in
12 in
12 in
35
Design volume of SCM cu ft
358487 cf
125985 of
66373 of
221084 of
3611
Is the outlet an orifice or a weir?
Weir
Weir
Weir
Weir
37
If orifice, office diameter inches
NIA
NIA
NIA
NIA
381
If weir, weir height inches
36 in
36 in
36 in
42 in
391
If weir, weir length Inches
36 In
36 in
36 In
36 in
40 Drawdown time for the temporary pool (days)
3.36
3.02
2.73
2.67
41 Are the inlet(s) and outlet located in a manner that avoids short-
circuiting?
Yes
Yes
Yes
Yes
42
Are berms or baffles provided to Improve the flowpath?
No
No
No
No
43
De th of fareba at entrance inches
54 in
54 in
54 in
54 in
44
Depth of forebay at exit inches
48 in
48 in
48 in
48 in
45
Does water flow out of the forebay in a non -erosive manner?
Yes
Yes
Yes
Yes
46
Width of the vegetated shelf feet
6 ft
6 ft
6 ft
6 ft
47
Slope of vegetated shelf H:V
6:1
6:1
6:1
6:1
48
Does the orifice drawdown from below the top surface of the
1permanentpool?
No
Yes
No
No
No
49
Does the pond minimize impacts to the receiving channel from the 1-
r 24-hr storm?
Yes
Yes
Yes
50Are
fountains proposed? (If Y, please provide documentation that
MDC 9 is met
No
No
No
No
51
Is a trash rack or other device provided to protect the outlet system?
Yes
Yes
Yes
Yes
52
Are the dam and embankment planted in non -clumping turf grass?
Yes
Yes
Yes
Yes
53
SpecAes of turf that Will be used on the dam and embankment
Centipede Grass
Centipede Grass
Centipede Grass
Centipede Grass
541
Hasa planting pien been provided for the vegetated shelf?
Yes
Yes
Yes
Yes
Wet Pond 3 1:48 PM 11/22/2022