SW6170603 - MIddleton Townes (3)

JW `' -
SUPPLEMENT -EZ FORM COVER PAGE
Please indicate the types, quantities and locations of SCMs that will be used on this project.
Quantity Location(s)
Infiltration System
Bioretention Cell
Wet Pond 1
Stormwater Wetland
Permeable Pavement
Sand Filter
Rainwater Harvesting
Green Roof
Level Spreader -Filter Strip
Disconnected Impervious Surface 0
Treatment Swale
Dry Pond
Designer information for this project:
Name and Title:
Fleet Temple
Organization-
Enoch Engineers, PA
Street address:
1403 NC 50 S
City, State, Zip:
Benson, NC 27504
Phone number(s):
919-894-7765
Email:
[e-mail]
Designer
Signature of Designer
Z®r7
Date
Project Name:
Middleton Townes
Address
Friendly Rd.
City / Town
Dunn
Applicant:
1 nvlrnnmen
Quality
Company.
RP Wellons Land & Development, LLC
Contact:
Robert P. Wellons
Mailing Address.
2004 W. Cumberland St.
City, State, Zip:
'Dunn, NC 28334
Phone number(s):
910-892-3123
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.
I am aware that there are significant penalties for submitting false
information including the possibility of fines and imprisonment for knowing
violations as well as a report being made to my professional board.
Cover Page 1 1:57 PM 5/30/2017

WET POND
Middleton Townes
THE DRAINAGE AREA
I
Drainage area number
1
Break down of BUA in the drainage area (both new and existing):
Total coastal wetlands area (sq ft)
N/A
Parking / driveway (sq ft)
24419 sf
Total surface water area (sq ft)
NIA
Sidewalk (sq ft)
2758 sf
Total drainage area (sq ft)
662112 sf
Roof (sq ft)
64971 sf
BUA associated with existing development (sq ft)
sf
Roadway (sq ft)
45312 sf
Proposed new BUA (sq ft)
137532 sf
- Other, please specify in the comment box below (sq ft)
Percent BUA of drainage area
21%
JTtal BUA (aq ft)
137532 sf
COMPLIANCE WITH THE APPLICABLE STORMWATER PROGRAM
Stormwater program(s) that apply (please specify):
Design rainfall depth (in)
10 in
Post Construction Stormwater
Minimum volume required (cu ft)
Design volume of SCM (cu ft)
20415 of
23504 cf
GENERAL MDC FROM 02H.1050
#1 Is the SCM sized to treat the SW from all surfaces at build -out?
Yes
#7 If applicable, with the SCM be cleaned out after construction?
Yes
#2 Is the SCM located on or near contaminated solls?
No
#8 Does the mametenance access comply with General MDC (8)?
Yes
#3 What are the side slopes of the SCM (H:V)?
3:1
#9 Does the drainage easement comply with General MDC (9)?
Yes
#3 Does the SCM have retaining walls, gabion walls or other engineered side slopes?
No
#10 If the SCM is on a single family lot, does the plat comply with General MDC (10)?
#4 Are the Inlets, outlets, and receiving stream protected from erosion (10 -year storm)?
Yes
#11 Is there an 0&M Agreement that complies with General MDC (11)?
Yes
#5 Is there a a bypass for flows in excess of the design flow?
Yes
#12 Is there an 0&M Plan that complies with General MDC (12)?
Yes
#6 What is the method for dewatenng the SCM for maintenance?
Pump (preferred)
1#13 Was the SCM designed by an NC licensed professional?
Yes
WET POND MDC FROM 02H.1053
#1 Method used
SAIDA
#6 Width of the vegetated shelf (feet)
6 ft
#1 Surface area of the main permanent pool (square feet)
21463 sf
#6 Location of vegetated shelf
Above Normal Pool
#1 Volume of the main permanent pool (cubic feet)
64222 cf
#6 Elevation of top of shelf (fmsl)
214 ft
#2 Average depth of the main pool (feet)
4 ft
#6 Elevation of bottom of shelf (fmsl)
213 ft
#2 Was the vegetated shelf included in the calculation of average depth?
No
#6 Slope of vegetated shelf (H:V)
6.1
#2 Elevation of the bottom of the permanent pool (fmsl)
208 ft
#7 Diameter of drawdown onfice (inches)
3.0 in
#2 Elevation of the top of the permanent pool (fmsl)
213 ft
#7 Drawdown time for the temporary pool (hours)
50 hrs
#2 Elevation of the top of the temporary pool (fmsl)
214 ft
#7 Does the onfice drawdown from below the top surface of the permanent pool?
Yes
#3 Depth provided for sediment storage (Inches)
121n
#8 Does the pond minimize impacts to the receiving channel from the 1 -yr, 24 -hr storm?
Yes
#4 Are the Inlet(s) and outlet located in a manner that avoids short-circuiting?
Yes
#9 Are fountains proposed?
No
#4 Describe any measures, such as berths or baffles, that will be taken to Improve the flow path:
#9 If yes, is documentation provided per Wet Pond MDC (9)?
#10 Is a trash rack or other device provided to protect the outlet system?
Yes
#5 Volume of the forebay (cubic feet)
11287
#11 Are the dam and embankment planted In non -clumping turf grass?
Yes
#5 Is this 15-20% of the volume in the main pool?
Yes
#11 Species of turf that will be used on the dam and embankment
Bermuda/Centipede—
er muda/Cenbpede#5
#5Depth of forebay at entrance (Inches)
48 in
#11 Describe the planting plan for the vegetated shelf.
#5 Depth of forebay at exit (Inches)
#5 Does water flow out of the forebay in a non-erosive mannan
#5 Clean-out depth for forebay (inches)
#5 Will the forebay be cleaned out when the depth is reduced to less than the above?
421n
Yes
12 in
Yes
50 plants/200sf for a total of 803 plants will be planted of the vegetated shelf. Plant materials will be selected from Table 3
Section C-3 of the NCDEQ Stormwater Design Manual
ADDITIONAL INFORMATION
Please use this space to provide any additional Information about this wet pond that you think is relevant to the review,
Wet Pond 2 1:57 PM 5/30/2017