SW4221101_Supplement-EZ Form_20221128

SUPPLEMENT-EZ COVER PAGE
FORMSLOADEi
PROJECT INFORMATION
1 Project Name Solace Preserve
2 Project Area ac 24.241
3 Coastal Wetland Area ac 0
4 Surface Water Area (ac) 0.343
1 6 (Does this project use an off -site SCM? I No I
COMPLIANCE WITH 02H .1003(4)
7
Width of vegetated setbacks provided feet
30
8
Will the vegetated setback remain vegetated?
Yes
9
If BUA is proposed in the setback, does it meet NCAC 02H.1003 4 c-d ?
N/A
10
Is streambank stabilization proposed on this project?
No
NUMBER AND TYPE OF SCMs:
11
Infiltration System
0
12
Bioretention 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 LS-FS
0
20
Disconnected Impervious Surface (DIS)
0
21
Treatment Swale
0
22
Dry Pond
0
23
StormFilter
0
24
Silva Cell
Ba filter
0
25
0
26 IFilterra
0
FORMS LOADED
I11]*1Mk,IZI:103ZI:AIIa[ofiAIIQk,
28
Or anization:
29
Street address:
30
City, State, Zip
31
Phone number)
32
Email:
Warren Consulting and Design, PLLC
850 9th Avenue NW
Hickory, NC
[phone]
pwarrenO-brmountainclub.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 that the engineering plans,
specifications, operation and maintenance agreements and other supporting information are consistent with the information provided here.
CA 0
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19 0
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Seal
Signature of Designer
Date

DRAINAGE AREAS
1 1 Is this a high density project? No
2 If so, number of drainage areas/SCMs 0
3 Does this project have low density areas? Yes
4 If so, number of low density drainage areas 14
Is all/part of this project subject to previous rule
5 versions? No
FORMS LOADED
DRAINAGE
AREA INFORMATION
IType of SCM
Entire Site
LD 1
LD 2
LD 3
LD 4
LD 5
LD 6
LD 7
LD 8
LD 9
LD 10
LD 11
LD 12
LD 13
LD 14
4
Grassed Swales
Grassed Swale
Grassed Swale
Grassed Swale
Grassed Swale
Grassed Swale
Grassed Swale
Grassed Swale
Grassed Swale
Grassed Swale
Grassed Swale
Grassed Swale
Grassed Swale
Grassed Swale
Grassed Swale
5
Total drainage area (sq ft
785320.27
223039.89
31843.3
22822.31
16112.38
7649.18
99699.69
249979.62
16616.89
104866.82
131998.12
38856.37
25557.2
96649.77
1879
6
Onsite drainage area (sq ft
720903.98
223039.89
31843.3
22822.31
16112.38
7649.18
99699.69
249979.62
16616.89
62655.09
123594.21
38856.37
25557.2
82849.54
1879
7
Offsite drainage area (sq ft)
64415.87
0
0
0
0
0
0
0
0
42211.73
8403.91
0
0
13800.23
0
8
Total BUA in project (sq ft
34939 sf
8030 sf
2060 sf
1510 sf
1257 sf
1224 sf
2961 sf
1878 sf
1145 sf
632 sf
7026 sf
2158 sf
1591 sf
2928 sf
851 sf
9
New BUA on subdivided lots (subject to
ermitting) (sq ft
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
10permitting)
New BUA not on subdivided lots (subject to
s
34939 sf
8030 sf
2060 sf
1510 sf
1257 sf
1224 sf
2961 sf
1878 sf
1145 sf
632 sf
7026 sf
2158 sf
1591 sf
2928 sf
851 sf
11
Offsite BUA (sq ft
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
12
1 Breakdown of new BUA not on subdivided lots:
- Parking (sq ft
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
- Sidewalk (sq ft
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
- Roof (sq ft
- Roadway s ft
- Future (sq ft
- Other, please specify in the comment box
below (sq ft)
New infiltrating permeable pavement on
subdivided lots (sq ft
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
34939 sf
8030 sf
2060 sf
1510 sf
1257 sf
1224 sf
2961 sf
1878 sf
1145 sf
632 sf
7026 sf
2158 sf
1591 sf
2928 sf
851 sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
13
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
14
New infiltrating permeable pavement not on
1subdivided lots (sq ft
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
15permitting)
Existing BUA that will remain (not subject to
s ft
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
16
Existing BUA that is already permitted s ft
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
17
Existing BUA that will be removed (sq ft
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
sf
18
Percent BUA
5%
4%
7%
7%
8%
16%
3%
1 %
7%
1 %
5%
6%
6%
3%
45%
19
Design storm inches
8.8 in
8.8 in
8.8 in
8.8 in
8.8 in
8.8 in
8.8 in
8.8 in
8.8 in
8.8 in
8.8 in
8.8 in
8.8 in
8.8 in
8.8 in
20
Desi n volume of SCM cu ft
52 cf
15 cf
2 cf
2 cf
1 cf
1 cf
6 cf
15 cf
1 cf
6 cf
9 cf
3 cf
2 cf
6 cf
cf
21
Calculation method for design volume
Rational Method
Rational Method
Rational Method
Rational Method
Rational Method
Rational Method
Rational Method
Rational Method
Rational Method
Rational Method
Rational Method
Rational Method
Rational Method
Rational Method
Rational Method
ADDITIONAL INFORMATION
22
Please use this space to provide any additional information about the
drainage area(s):
All grass swales are proposed as v-ditches with side slopes of 2:1, and lined
with matting as specified on the Plan Sheets. Check dams are included
where necessary. Grassed swales were sized for the 25yr storm using the
Rational Method.

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?
8.67
6
Are curb outlet swales proposed?
No
7
Maximum longitudinal slope of curb outlet swale(s) (%)
N/A
8
Bottom width of curb outlet swale(s) (feet)
N/A
9
Maximum side slope of curb outlet swale(s) (H:V)
N/A
10
Minimum length of curb outlet swale(s) (feet)
N/A
11
Are treatment swales used instead of curb outlet swales?
No
12
Ps stormwater released at the edge of the setback as dispersed flow?
No
13
Have stormwater outlets been designed to prevent downslope erosion?
Yes
14
Are variations to rule .1003 proposed?
No
ADDITIONAL
INFORMATION
15
1 Please use this space to provide any additional information about this low density project:
Water is collected in grassed swales. Stormwater is conveyed under proposed driveways via a series of pipes to minimize interior drainage
areas, pipe sizes, and storm flows and velocities. Permanent matting has been specified via shear stress and velocity calculations for the the
25 year storm. Additionally, check dams are spaced between 25-50' along swales depending on swale slope. Flow from pipe outlets are
conveyed to stilling basins (approved) during the ESC phase; those areas are converetd to rip rap energy dissapators post -construction (once
stabilizaiton is complete). No curb is proposed for the project. All roadways are proposed as gravel. Grassed side slopes are proposed at 2:1
to reduce adjacent cut slope heights. The project area is steep and presently forested; the property owner wishes to minimize cut slopes that
heal slowly in the forested mountain setting regardless of matting and hydroseeding practices (see proposed stabilization measures for cut
slopes).
Swale
#
Drainage
BUA
Area (ac)
Pervious
aarea
C
Q
(cfs)
Slope
N
Va„oW
(fps)
Vactual
(fps)
Flow depth
(ft)
1
223039.89
8029.52
215010.37
0.32
14.57
6.58
6.00
4.62
1.21
2
31843.30
2060.09
29783.21
0.34
2.20
4.70
6.00
2.89
0.77
3
22822.31
1509.57
21312.74
0.34
1.58
0.81
6.00
1.19
0.77
4
16112.38
1257.29
14855.09
0.35
1.14
3.80
6.00
1.95
0.50
5
7649.18
1224.18
6425.00
0.40
0.62
12.00
6.00
2.51
0.31
6
99699.69
2960.87
96738.82
0.32
6.43
10.60
6.00
4.22
0.74
7
249979.62
1877.94
248101.68
0.30
15.40
8.10
6.00
5.10
1.22
8
16616.89
1144.62
15472.27
0.34
1.16
12.00
6.00
3.00
0.41
9
104866.82
631.65
104235.17
0.30
6.44
12.00
6.00
4.80
0.82
10
131998.12
7025.75
124972.37
0.33
8.92
14.90
6.00
8.67
0.68
11
38856.37
2157.50
36698.87
0.34
2.64
11.90
6.00
3.76
0.57
12
25557.20
1590.91
23966.29
0.34
1.76
14.90
6.00
3.70
0.47
13
96649.77
2928.26
93721.51
0.32
6.24
14.90
6.00
5.09
0.76
14
1879.00
850.91
1028.09
0.59
0.23
14.80
6.00
1.87
0.17
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30