SW3221202_O&M Agreement/Plan_20230315

Operation & Maintenance Agreement
Project Name:
Project Location:
Piper Meadows
4004 New Town Rd. Waxhaw, NC 28173
Cover Page
Maintenance records shall be kept on the following BMP(s). This maintenance record shall be kept in a log in a known set
location. Any deficient BMP elements noted in the inspection will be corrected, repaired, or replaced immediately. These
deficiencies can affect the integrity of structures, safety of the public, and the pollutant removal efficiency of the BMP(s).
The BMP(s) on this project include (check all that apply & c
Bioretention Cell Quantity
Dry Detention Basin
Grassed Swale
Green Roof
Infiltration Basin
Infiltration Trench
Level Spreader/VFS
Permeable Pavement
Proprietary System
Rainwater Harvesting
Sand Filter
Stormwater Wetland
Wet Detention Basin
Disconnected Impervious Area
User Defined BMP
Quantity:
Q uantity:
Quantity:
Q uantity:
Quantity
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Q uantity:
Quantity,
Present,
Present:
LI
0
0
0
0
2
No
No
O&M tables will
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s)
I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed
for each BMP above, and attached O&M tables. I agree to notify NCDENR of any problems with the system or prior to any
changes to the system or responsible party.
* Responsible Party: IMike McGee
Title & Organization:I Owner / MHC at P
Street address: 14608 Carriker Rd.
City, state, zip
Phone number(s)
Email
Monroe, NC 28110
[phone]
r Meadows
[e-mail]
Signature:d� Date:
I, L-birarlo
%v v v��► a Notary Public for the State of -Lath CA rU { l
County of do hearby certify that , " 1 CMr/1r�n A LIM .
CA -
personally appeared before me this day of 0 C 1 V � d-C/y in 7AZ and
acknowledge the due execution of the Op ratio s and Maintenance Agree t .
Witness my,hia6t,�,and official seal,
:NOTARY �l
pUBL\G C
ST0,RbbT2
Version 1.4
My commission expires !V V V I C� I t 03/10/2017
C&M lMrraat Page 1 of 5

Wet Det'ntion': ,on ain, enahb6. , eguiremen s
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if
one is provided.
Important maintenance procedures:
Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the
basin should be watered twice weekly if needed, until the plants become established (commonly six weeks).
No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to
establish the plants on the vegetated shelf.
Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention
basin.
If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the
emergency drain should be minimized to the maximum extent practical.
- Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month and within 24 hours after every storm event
greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance should be kept in a
known set location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately.
BMP element:
Potential problem:
IHow I will remediate the problem:
The entire BMP
Trash/debris is present.
IRemove the trash/debris.
The perimeter of the BMP
Areas of bare soil and/or
Regrade the soil if necessary to remove the gully, and then plant a
erosive gullies have formed.
ground cover and water unt I it is established. Provide lime and a one-
time fertilizer application.
Vegetation is too short or too
Maintain vegetation at a height of approximately six inches.
long.
The inlet device
The pipe is clogged.
jUnclogthepipe. Dispose of the sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Regrade the swale if necessary to smooth it over and provide erosion
Erosion is occurring in the
swale.
control devices such as reinforced turf matting or riprap to avoid future
problems with erosion.
Stone verge is clogged or
Remove sediment and replace with clean stone.
covered in sediment (if
applicable).
The forebay
Sediment has accumulated to
Sea cr h for the source of the sediment and remedy the problem if
a depth greater than the
Ipossible. Remove the sediment and dispose of it in a location where it
original design depth for
will not cause impacts to streams or the BMP.
sediment storage.
Erosion has occurred.
Provide additional erosion protection such as reinforced turf matting or
riprap if needed to prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by hand. If pesticide is used, wipe it on
Best professional practices 1Prune
the plants rather than spraying.
according to best professional practices
The vegetated shelf
show that pruning is needed
to maintain optimal plant
health.
Plants are dead, diseased or
IDetermine the source of the problem: soils, hydrology, disease, etc.
dying.
IRemedy the problem and replace plants. Provide a one-time fertilizer
application to establish the ground cover if a soil test indicates it is
necessary.
Weeds are present.
Remove the weeds, preferably by hand. If pesticide is used, wipe it on
the plants rather than spraying.
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y Wet Detention Pond::Maintenance Requirements (Continued)
The main treatment area Sediment has accumulated to Search for the source of the sediment and remedy the problem if
a depth greater than the possible. Remove the sediment and dispose of it in a location where
original design sediment will not cause impacts to streams or the BMP,
storage depth.
Algal growth covers over 50% I
Consult a professional to remove and control the algal growth.
of the area.
The embankment
The outlet device
e receiving water
Cattails, phragmites or other
invasive plants cover 50% of
the basin surface.
Shrubs have started to grow
on the embankment.
Remove the plants by wiping them with pesticide (do not
Remove shrubs immediately.
Evidence of muskrat or
Use traps to remove muskrats and consult a professional to remove
beaver activity is present.
beavers.
A tree has started to grow on
Consult a dam safety specialist to remove the tree.
the embankment.
An annual inspection by an
Make all needed repairs,
appropriate professional
shows that the embankment
needs repair. (if applicable)
Clogging has occurred.
Clean out the outlet device. Dispose of the sediment off -site.
The outlet device is damaged
Repair or replace the outlet device.
Erosion or other signs of
IContact the local NC Department of Environment and Natural
damage have occurred at the
Resources Regional Office.
outlet.
The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not
readily penetrate into accumulated sediments.
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Wet Detention Pond Design Summary
Wet Pond Diagram
WET POND ID
FOREBAY
MAIN POND
Permanent Pool El.
623'
Permanent Pool El.
623'
624,75'
Temporary Pool El:
Temporary Pool El:
624,75'
Pretreatment other No
Clean Out Depth:
Clean Out Depth:
60"
24"
621'
than forebay?
Sediment Removal El:
Sediment Removal El:
618'
620'
Has Veg. Filter? Yes Bottom Elevation:
Bottom Elevation:
619'
WET POND ID
FOREBAY
MAIN POND
2
Permanent Pool El.
620'
Permanent Pool EI,
620'
Temporary Pool El:
622'
Temporary Pool El:
622'
Pretreatment cther No
Clean Out Depth:
48"
Clean Out Depth:
72"
than forebay?
Sediment Removal EI:
616'
Sediment Removal El:
614'
Has Veg. Filter? Yes
Bottom Elevation:
615'
Bottom Elevation:
613'
WET POND ID
FOREBAY
MAIN POND
_ _ I
Permanent Pool El.
Permanent Pool El.
Temporary Pool El:
Temporary Pool El:
Pretreatment other
Clean Out Depth:
0
Clean Out Depth:
0
than forebay?
Sediment Removal El:
Sediment Removal El:
F_
Has Veg. Filter?
Bottom Elevation:
Bottom Elevation:
WET POND ID
FOREBAY
MAIN POND
Permanent Pool El.
Permanent Pool El.
Temporary Pool El:
Temporary Pool El:
Pretreatment other
Clean Out Depth: 0
Clean Out Depth:
0
than forebay?
Sediment Removal El:
Sediment Removal El:
Has Veg, Filter?
Bottom Elevation:
Bottom Elevation:
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Version 1 A O&M Manual Page 5 of 5