SW4240503_Supplement-EZ Form_20240823

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name WILDERNESS RESERVE PHASE 3
2 Project Area ac 54.48
3 Coastal Wetland Area ac 0
4 Surface Water Area ac 0
5 Is this project High or Low Density? Low
6 1 Does this project use an off-site SCM? No
MPLIANCE WITH 02H.1003(4)
7 Width of vegetated setbacks provided feet >100 FT
8 Will the vegetated setback remain vegetated? Yes
9 If BUA is ro osed in the setback,does it meet NCAC 02H.1003 4 o-d ? N/A
10 Is streambank stabilization proposed on this project? No
BER AND TYPE OF SCMs:
11 Infiltration System
12 Bioretention Cell
13 Wet Pond
14 Stormwater Wetland
15 Permeable Pavement
16 Sand Filter
17 Rainwater Harvesting RWH
18 Green Roof
19 Level Spreader-Filter Strip LS-FS
20 Disconnected Impervious Surface DIS
21 Treatment Swale
22 Dry Pond
23 StormFilter
r2624 Silva Cell
25 Bayfilter
Filterra
FORMS LOADED
SIGNER CERTIFICATION
Name and Title: GREG GOTSCH
L929
Or anization: LAND RESOURCE MANAGEMENT
Street address: 118 CHERRY ST
Cit ,State,Zip: BLACK MOUNTAIN, NC 28711
31 Phone numbers: 828 900-8700
32 Email: [e-mail]
Certification Statement:
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.
Designer
``pu�u��li�lpii
Signature of Designer
�'.,� ,p'••.........••'G o`er
5/28/2024
Date

DRAINAGE AREAS
1 Is this a high density project? No
2 If so,number of drainage areas/SCMs 0
3 Does this ro'ect have low density areas? NO
4 If so,number of low density drainage areas 1
Is all/part of this project subject to previous rule
5 versions? Yes
FORMS LOADED
DRAINAGE AREA INFORMATION Entire Site LD 1
4 Type of SCM N/A
5 Total BUA from project(sq ft) 167770 sf
6 1995 rules
SL 2006-246
2008 rules
2017 rules
New BUA on subdivided lots(subject to
7 permitting)(sq ft)
1995 rules
SL 2006-246
2008 rules
2017 rules
New BUA not on subdivided lots(subject to
8 permitting)(sf)
1995 rules
SL 2006-246
2008 rules
2017 rules
9 Offsite-total area(sq ft) sf sf
1995 rules
SL 2006-246
2008 rules
2017 rules
10 Offsite BUA(sq ft) sf sf
1995 rules
SL 2006-246
2008 rules
2017 rules
11 Design storm(inches) NA NA
1995 rules
SL 2006-246
2008 rules
2017 rules
12 Breakdown of new BUA:
-Parking(sq ft 23106 sf
-Sidewalk(sq ft sf
-Roof(sq ft 86913 sf
-Roadway s ft 57749 sf
-Future(sq ft sf
-Other,please specify in the comment box
below(sq ft sf
New infiltrating permeable pavement on
13 Isubdivided lots(sq ft NA
New infiltrating permeable pavement not on
14 subdivided lots(sq ft NA
Existing BUA that will remain(not subject to
15permitting) s ft NA
16 Existing BUA that is already permitted(sq ft NA sf
17 Existing BUA that will be removed(sq ft NA
18 Percent BUA 7%
19 1 Desi n volume of SCM cu ft cf
20 1 Calculation method for design volume NA
ADDITIONAL INFORMATION
Please use this space to provide any additional
21 information about the drainage area(s):
DRAINAGE AREA INFO IS ONLY FOR WATERSHED WITHIN AN ORW
WATERSHED.

LOW DENSITY
DESIGN REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 021-1.1003
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? 7.6
6 Are curb outlet swales proposed? No
7 Maximum longitudinal slope of curb outlet swale(s)(%) NA
8 Bottom width of curb outlet swale(s)(feet) NA
9 Maximum side slope of curb outlet swale(s)(H:V) NA
10 Minimum length of curb outlet swale(s)(feet) NA
11 Are treatment swales used instead of curb outlet swales? Yes
12 Is stormwater released at the edge of the setback as dispersed flow? Yes
13 Have stormwater outlets been designed to prevent downslope erosion? Yes
14 lAre variations to rule.1003 proposed? I No
ADDITIONAL INFORMATION
15 Please use this space to provide any additional information about this low density project:
ALL AREA IS WITHIN ORW
Drainage Pervious
Swale A BUA area C Q Slope V,i„w V,�,,,i Flow depth
Area# re (ac) ac (cfs) (%) (fps) (fps) (ft)
fac1 0.64 0.22 0.42 0.49 2.18 5.66 15.00 0.90 11.16
2 0.68 0.04 0.64 0.29 1.38 11.41 15.00 1.10 7.68
3
4
5 1.11 0.11 1.00 0.32 2.44 11.95 15.00 1.27 9.96
6 0.51 0.14 0.37 0.45 1.57 13.16 15.00 1.19 7.92
7 0.08 0.08 0.00 0.95 0.52 13.16 15.00 0.60 2.40
8 0.14 0.06 0.08 0.56 0.54 12.16 15.00 0.87 4.80
9 0.71 0.20 0.51 0.45 2.21 11.48 15.00 1.21 9.60
10 1.22 0.35 0.87 0.45 3.78 11.46 15.00 7.58 4.08
11 0.27 0.27 0.01 0.94 1.75 11.46 15.00 0.79 4.56
12 0.79 0.28 0.51 0.50 2.70 8.65 15.00 1.16 11.28
13 0.12 0.07 0.05 0.67 0.55 5.82 15.00 0.66 5.76
14 0.06 0.03 0.03 0.66 0.27 5.82 15.00 0.54 3.96
15
16 0.22 0.12 0.10 0.63 0.96 12.74 15.00 1.01 6.36
17 0.42 0.16 0.26 0.52 1.50 12.93 15.00 1.15 7.80
18 0.47 0.17 0.30 0.51 1.65 13.03 15.00 1.19 8.16
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