SW3241001_Supplement-EZ Form_20241022

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name _ MarshvMNe Lake Park
2 Project Area(ac) _ 59.83
3 Coastal Wetland Area(ac) 0
4 Surface Water Area(ac) 14.48
5 Is this project High or Low Density? Low
6 Does this project use an off-site SCM? No
COMPUANCE WITH 02H.1003(4)
7 'Width of vegetated setbacks provided(feet) 30
8 I Will the vegetated setback remain vegetated? Yes
9 I If BUA is proposed in the setback,does it meet NCAC 02H.1003(4)(c-d)?
10 Its streambank stabilization proposed on this project? No
NUMBER 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
24 Silva Cell
25 Bayfilter
26 Filterra
FORMS LOADED
DESIGNER CERTIFICATION
27 Name and Title: I Morgan Woolner,Project Manager
28 Organization: l Beneath
29 Street address: 2359 Perimeter Pointe Parkway
30 City,State,Zip: Charlotte,NC 28208
31 Phone number(s): 704-943-3172
32 Email: [e-mail]
Certification Stalcment
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.
Desianor
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DRAINAGE AREAS
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 area: 1
Is alUpart of this project subject to previous rule
5 versions? No
FORMS LOADED
DRAINAGE AREA INFORMATION Endre Site LD 1
4 Type of SCM WA NIA
5 Total drainage area(sq ft) 3236943.6 3336943.6
6 Onsite drainage area(sq ft) 3236943.6 3236943.6
7 Offsite drainage area(sq ft) 0 0
8_Total BUA in project(sq ft) 49837 sf 49837 sf
New BUA on subdivided lots(subject to permitting)
9 (sq ft)
New BUA not on subdivided lots(subject to
10 permitting)ID 49837 sf 49837 sf
11 Offsite BUA(sq ft)
12 Breakdown of new BUA not on subdivided lots
-Parking(sq ft) 20735 at 20735 sf
-Sidewalk(sq ft) 4904 Si 4904 sf
-Roof(sq ft) 1330 sf 1330 sf
-Roadway(sq ft) 7896 sf 7896 sf
-Future(sq ft) sf sf
-Other,please specify in the comment box below
(sq ft) 11208 sf 11208 sf
New infiltrating permeable pavement on subdivided
13 lots(sq ft)
New infiltrating permeable pavement not on
14 subdivided lots(sq ft) sf
Existing BUA that will remain(not subject to
15 ,permitting)(sq ft) 3764 sf 3764 sf
16 Existing BUA that is already permitted(sq ft; 14148 st 14148 sf
17 Existing BUA that will be removed(so ft) 10384 VI 10384 sf
18 Percent BUA 211. 2%
19 Design storm(inches) N/A N/A
20 Design volume of SCM(cu ft) N/A N/A
21 Calculation method for design volume NIA N/A
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s):
"Other BUA"refers to asphalt multi use path throughout the park

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) 3:1
5 Maximum velocity in the vegetated conveyances during the 10-year storm? 2.03
6 Are curb outlet swales proposed? No
7 Maximum longitudinal slope of curb outlet swale(s)(%)
8 Bottom width of curb outlet swale(s)(feet)
9 Maximum side slope of curb outlet swale(s)(H:V)
10 Minimum length of curb outlet swale(s)(feet)
11 Are treatment swales used instead of curb outlet swales? No
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 Are variations to rule.1003 proposed? No
,ADDITIONAL INFORMATION
15 Please use this space to provide any additional information about this low density project
Curb outlets from parking lot and storm conveyance system discharge to rip rap aprons which in turn discharge to an exislting
vegetated swale along the property line.The existing vegetated swale will be used as the"curb outlet swale"for the project.
Drainage Pervious
Swale BUA Q Slope Vui, V. Flow depth
Are� (ac) area(ae) (�) (%) (ha) (Vs) (ft)
(ac1
2 0.31 0.00 0.21 0.43 1.04 1.80 4.50 1.55 0.31
3 0.14 0.00 0.14 0.30 0.33 2.93 4.50 1.63 0.26
4 0.13 0.00 I 0.13 0.30 0.30 1.37 4.50 1.28 0.28
5 0.13 0.00 0.13 0.30 0.30 1.37 4.50 1.28 0.28
6 0.07 0.00 0.07 0.29 0.16 1.99 4.50 1.21 0.21
7 0.25 0.00 0.21 0.40 0.79 2.05 4.50 2.03 I 0.41
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