SW3190505_Form_(Supp.EZ)_20200107

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name
COURTYARDS ON LAWYERS ROAD
2
Project Area ac
50.337
3
Coastal Wetland Area ac
0
4
Surface Water Area ac
1.041
5
6 _
w _
Is this project High or Low Density?
High
No
Does this project use an offsite SCM?
COMPLIANCE WITH 02H .1003(4)
7
Width of vegetated setbacks provided (feet)
100
8
Will the vegetated setback remain vegetated? _ �� Yes
9
Is BUA other that as listed in .1003(4) c d out of the setback? I Yes
I
Is streambank stabilization proposed on this project? No
NUMBER AND TYPE OF SCMs:
11
Infiltration System
0
12
Sioretention Cell
0
13
Wet Pond
2
14
Storrnwater Wetland
0
15
Permeable Pavement
0
16
Sand Filter
0
17
Rainwater_ Harvesting (RWH)
0
18
Green Roof
0
19
Level Spreader -Filter Stri LS-F5
0
20
Disconnected Impervious Surface (❑IS)
0
21
Treatment Swale
0
22
Dry Pond
0
23
StormFilter
0
24
Silva Cell
0
25 113ayfilter
0
0
26
_
Fiiterra
FORMS LOADED
DESIGNER CERTIFICATION
27 Name and Title:
28 O anization:
30 ]City, State, Zip:
31 Phone number(s):
32 Email:
VINCENT G. KEENE. PE
YARBROUG WILLIAMS & HOULE, INC.
PO BOX 1198
PINEVILLE, NC, 28134
704-556-1990
VINCEKdiY-WH.COM
Certification Statement:
I certify, under pen aity 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.
N11"gJill V11I11118OPP.
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Ignature of DAsigner
Date
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DRAINAGE AREAS
1 Is this a high density ro'ect? Yes
2 If sp, number of drainage areaslSCMs 2
Is alllpart of this project subject to previous rule
3 versions? No
FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
4
Type of 5CM
5
Total BUA in project [sq ft]
932888 sf
685928 Sf
246960 sf
6
_
New BUA on subdivided lots (subject to permitting]
(Sq ft
7
_
New BUA outside of subdivided lots (subject to
ermitting)_(�k
8
offsite - total area (sq ft
9
Offsite BU(.Sq to
10
Breakdown of new BUA outside subdivided lots:
- Parkin s ft
- Sidewalk (sq ft
26222 sf
- Roof (sq ft
- Roadway sg_ft
193140 sf
- Future (sq ft
3500 sf
- Other, please specify in the comment box
below (sq ft
24098 sf
11
New infiltrating permeable pavement on
subdivided lots (sq ft
12
New infiltrating permeable pavement outside of
subdivided lots ft
13
Exiskng BUA that will remain {not subject to
permittin sg ft}_
Existinq BUA that is a]read y permitted {sq ft}
14
15
Existin BUA that will be removed s R
16
Percent BUA
439b
17
Design storm inches
18
Design volume of 5CM cu ft
19
Calculation method for design volume
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
20 drainage area(s):
Other for W.P #1 includes clubhouse, parking, pool deck, courts, etc. for
future amenity. Other for W.P. #2 includes part of a pedestrian trail. Other for
entire site includes future amenity and whole trail. Ex. BUA to remain in O.A.
#1 is for portions of ex. Allen Black Road within drainage area.
Wet Pond Wet Pond
5$5672 sf 368029 sf
385636 sf 300292 sf
169582 sf 67737 sf
344246 sf 19163 sf
5496 sf
19827 sf 1 3117 sf
64385 sf
17500 sf 1 235 sf
4958 sf
41%Flyr---24hr
9%
2intin
124277 ct037
of
lyr-24hr PrelPost
Differenceerence
Pre/Post

WETPOND
1 Drainage area number + 1 2
2}Oasgn volume of SCM (cu ft] 12427�cf43037 If
GENERAL MOC FROM DZH .1050
3 Is the SCM sized to treat the SW from all surfaces at build -out?
*Be
Fes
Yes
3:1
4 Is the SCM located away from contaminated soils?
Yes
5 What are the side slopes of the SCM (H.,V)7
Does the SCM have retaining walls, gabion walls or other engineered
6 side slopes?
Are the inlets, outlets, and receiving stream protected from erosion
(10-year storm)?
Is there an overflow or bypass for inflow volume in excess of the
design volume?
What is the method for dewatering the SCM for maintenance?
If applicable, will the SCM be cleaned out after construction?
3:1
No
No
7
Yes
Yes
8
Yes
Pump_ (preferred)
Yes
Yes
9
Pump (preferred)
10
Yes
Yes
Yes
11
Does the maintenance access comply with General MDC (B)? Yes
12
131
Does the drainage easement comply with General MDC (9)?
If the SCM is on a single family lot, does (will?) the plat comply with
General MDC (10)?
Is there an O&M Agreement that complies with General MDC (11)?
_ _Yes
Yes
Yes
14
i Yes
Yes
15
is there an O&M Plan that complies with General MDC (12)?
Yes
Yes
16 Does the SCM follow the device specific MDC?
17TWas the SCM designed by an NC licensed professional?
WET POND MDC FROM 02H .1053
18 Method used ^�
Yes
Yes
Yes
FDA
Yes
SAIDA
19
Has a stagelstorage table been provided in the calculations?
Ye_s
Yes
20
Elevation of the excavated main pool depth (bottom of sediment
removal) (fmsl)
051,60
652.50
048.00
21
Elevation of the main pool bottom -(top of sediment removal) (fmsl)
649,00
22
Elevation of the bottom of the vegetated shelf(fmsl}
660.00
662.00
23
Elevation of the permanent pool (fmsl)
660,50
662.50
24
Elevation of the top of the vegetated shelf (final}
661.00
66100
25
Elevation of the temporary pool (fmsl)
663.81
665.65
26
Surface area of the main permanent pool (square feet)
21500
Y7600
27
Volume of the main permanent pool (cubic feet)
120650 of
47925 cf
28
Average depth of the main pool (feet)
6.38 ft
7-12 ft
29
Average depth equation used
Equation 3
Equation 3
30
If using equation 3, main pool perimeter (feet)
610,o ft
336.0 ft
If using equation 3, width of submerged veg. shelf (feet)
5.0 ft
3.0 ft
t31
32
Volume of the forebay (cubic feet)
22175 of
7350 cf
33
Is this 15-20% of the volume in the main pool?
Yes
y es,
34
Clean -out depth for forebay (inches)
66 in
124277 ti
78 in
43037 Cf
35
Design volume of SCM (cu ft)
36
Is the outlet an orifice or a weir?
Orrice
Orifice
37
!f orifice, orifice diameter (inches)
5 in
3 in
38
If weir, weir height (inches)
39
If weir, weir iength (inches)
40
Drawdown time for the temporary pool (days)
2
2
41
Are the inlets) and outlet located in a manner that avoids short-
circuiting?
Yes
No
Yes
42
Are berms or baffles provided to improve the flow path?
No
43
Depth of forebay at entrance (inches)
86 in
98 in
44
Depth of forebay at exit (inches) 66 in
78 in
45
Does water flow out of the forebay in a non -erosive manner?
Yes
Yes
46
Width of the vegetated shelf (feet)
10 ft
B ft
47
§lope of vegetated shelf (HA/)
1 p 1
6.11
_ 48
Does the orifice drawdown from below the top surface of the
permanent pool?
_
Yes
Yes
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.)
No
No
51
Is a trash rack or other device provided to protect the outlet system?
Yes
Yes
Y 52
Are the dam and embankment planted in non -clumping turf grass?
Yes
Yes
5S
§pecies of turf that will be used on the dam and embankment
—BERMUDA
BERMLiDA
54
as a planting plan been provided for the vegetated shelf? i
Yes es
A0131TIONAL INFORMATION
55
Please use this apace to provide any additional information about the
wet pond(s):
Wet Pond 1 1:11 PM 2,✓10/2020