SW5200201_Supplement-EZ Form_20200413

SUPPLEMENT-EZ COVER PAGE
jPROJECT INFORMATION
1 Project Name Lee Street Athletic Complex Improvements
2 !Project Area (ac) 14.068
3 Coastal Wetland Area (ac) 0 - _ _ -_ -_ _-
- 4 Surface Water Area (ac) 0 =_R -
5 Is this project High or Low Density? Low
6 Does this project use an off -site SCM? No
COMPLIANCE WITH 02H .1003(4)
7 Width of vegetated setbacks provided (feet) _
N/A
8 l Will the vegetated setback remain vegetated? Yes
9 1 Is BUA other that as listed in .1003(4)(c-d) out of the setback? Yes
b_; Is streambank stabilization proposed on this project? No
NUMBER AND TYPE OF SCMs:
11 Infiltration System_
_4__
12 IBioretention Cell
13 Wet Pond
14 .JStormwater Wetland
15 Permeable Pavement
16 'Sand Filter
17 Rainwater Harvesting (RW_ H)____
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�!Ba- alter
26 { Filterra
FORMS LOAr'F-D
DESIGNER CERTIFICATIOP
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TName and Title:
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Organization:
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!Street address: -
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City, State, Zip:
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Phone number(s):
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Email:
Zak Shipman, PE -President
Shipman Engineering, PLLC
137 Middlegreen Place
Holly Springs, NC 27540
[phone]
[e-mail]
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.
Seal
kA
Signature of Designer
7 / &ZO
Date

DRAINAGE AREAS
1 Is this a high density project?--.. . No
2 If so, number of drainage areas/SCMs 1
Is all/part of this project subject to previous rule
3 versions? No
DRAINAGE AREA INFORMATION
Entire Site
4
1 Tye of SCM
5
Total BUA in project sq ft) _
53789 sf
'New BUA on subdivided lots (subject to permitting)
6
(sq ft)
New BUA outside of subdivided lots (subject to
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permitting) (§J
15360 sf
8
Offsite - total area (sq ft)
9
' Offsite BUA (sq ft)
10
Breakdown of new BUA outside subdivided lots:
- Parking (sq ft)
10202 sf ,
- Sidewalk (sq ft)
3494 sf
- Roof (sq ft)
1664 sf
- Roadway (sq ft)
- Future (sq ft)
- Other, please specify in the comment box
below (sq ft)
New infiltrating permeable pavement on
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subdivided lots (sq ft
New infiltrating permeable pavement outside of
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ubdivided lots (sq ft)
JExisitngBUA that will remain (not subject to
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'permitting) (sq ft)
38429 sf
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Existing BUA that is already permitted (sq ft)
15
Existing BUA that will be removed (sq ft)
16
Percent BUA
9%
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Design storm (inches)
18
Design volume of SCM (cu ft)
19
Calculation method for design volume
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
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drainage area(s):

LOW DENSITY
n
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. 1 003(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?
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)
t
11 Are treatment swales used instead of curb outlet swales?
k
L-12 Is 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
.nNow,.
15 Please use this space to provide any additional information about this low density project: µ
No significant drainage conveyances are proposed. Drainage will be conveyed via sheet flow and several minor graded low spots into the
existing drainage system.
Swal
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