SW6201004_Supplement-EZ Form_20210126

SUPPLEMENT-EZ COVER PAGE
F- FORMS LOADED I
PROJECT INFORMATION
1 Project Name Blackhawk Landing
2
Project Area (ac)
34.6814
3
Coastal Wetland Area (ac)
4
Surface Water Area
5
Is this project High or Low Density?
High
6
Does this project use an off -site SCM?
No
COMPLIANCE -WITH 02H -1003L4),
7 Width of veqttated setbacks orovided (feet)
8
Will the vegetated setback
9
Is BLIA other that as listed in .1 003(4)(c-d) out of the setback?
No
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
I
14
Stormwater Wetland
0
15
Permeable_Pavement
0
16
Sand Filter
0
17
Rainwater HaLyt§t!j!qjEVHj___---
0
18
Green Roof
0
19
Level Spreader -Filter Strip (LS-FS)
0
20
Disconnected
0
21
Treatment Swale
0
22 _
PD.Eond
0
23
StormFilter
0
24
Silva Cell
0
25
Ba filter
0
26
Filterra
0---J
I FORMS LOADED
SIGNER CERTIFICATION
27 Name and Title: Matt Lowder, PE
28 _
Organization: v
Triangle Site Design, PLLC
29
Street address:
4004 Barrett Drive, Suite 101
30
City, State, Zip:
Raleigh, NC 27609
31
Phone number(s):
919-553-6570
32
Email:
[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
F19-natur4 of Designer
1141(
Date

1
Is this a high density project?
Yes
2
If so, number of drainage areas/SCIVIs
3
Is all/part of this project subject to previous rule
versions?
No
I FORMS LOADED I
DRAINAGE AREA INFORMATION
4 _ Type of SCM
Entire Site
Wet Pond
1
Wet Pond
5
Total BUA in project (sq ft)
478257 sf
478257sf
6
New BUA on subdivided lots (subject to permitting)
(sq ft)
-
7
New BUA outside of subdivided lots (subject to
permitting) (sf)
8
Offsite - total areas ft)
-
-
9
Offsite BUA (sq ft)
248585 sf
248585 sf
10
Breakdown of new BUA outside subdivided lots:
Parkinqjsg ft)
95697 sf
95697sf
I Sidewalks ft)
17560 sf
17560sf
Roofs ft)
366000sf
365000 sf
Roajdwa sq ft)
-
Future (sq ft)
Other, please specify in the comment box
below (sq ft)
11
New infiltrating permeable pavement on
subdivided lots (sq ft)
12
New infiltrating permeable pavement outside of
subdivided lots (sq ft)
13
Exisitng BUA that will remain (not subject to
p2EMittinRas
14
Existing BUA that is already permined (sq ft)
15
Existing BUA that will be removed (sq ft)
16
Percent BUA
31.66%
56.18%
17
lDesIqn storm (inches)
1.0 in
1.0 in
18
JDesign volume of SCIVI cu ft)
60758 cf
60768 cf
19
ADDITIONAL
1 Calculation method for design volume --'§A-/DA
INFORMATION ---'--
SA/DA
20
I Please use this space to provide any additional information about the
drainage area(s):
Line 10 - There is offsite BUA draining towards the wet pond. The wet pond
has been overclesigned to overcompensate the off -site drainage area to
balance out the impervious area not directly draining to the wet pond by Lots
38-42 and Lots 72-73.