SW6220202_O&M Agreement/Plan_20220223

Operation & Maintenance Agreement
Project Name: Messer Parcels
Project Location: Coats, NC
Cover Page
Maintenance records shall be kept on the following SCM(s). This maintenance record shall be kept in a log in a known set location.
Any deficient SCM 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 SCM(s).
The SCM(s) on this project include (check all that apply & corresponding O&M sheets will
Infiltration Basin Quantity:
Infiltration Trench Quantity:
Bioretention Cell Quantity:
Wet Pond Quantity:
Stormwater Wetland Quantity:
Permeable Pavement Quantity:
Sand Filter Quantity:
Rainwater Harvesting Quantity:
Green Roof Quantity:
Level Spreader - Filter Strip Quantity:
Proprietary System Quantity:
Treatment Swale Quantity:
Dry Pond Quantity:
Disconnected Impervious Surface Present:
User Defined SCM Present:
Low Density Present:
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):
Type:
1
No
No
No
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135.415700.-78.669482 1
CLICK TO UPDATE O&M MANUAL
acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for
each SCM above, and attached O&M tables_ I agree to notify NCDEQ of any problems with the system or prior to any changes to
the system or responsible party.
Responsible Party
Title & Organization
Street address:
City, state, zip:
Phone number(s):
Email:
Lee Smith
Manager, T&L Coats LLC
165 Sommerville Park Road
Raleigh, NC 27604
919.651.0009
[e-mail]
11
Signature. Date: i/
I, a Notary Public for the State of ¢.AJ; r,ie4__,
County of w qkQ - do hereby certify that 4
personally appeared before me this �� day of ),!L:�I&qAt_ �,'212L and
acknowledge the due execution of the Operations and Maintenance A ement .
Witness my hand and official seal,
Catherine Holland Sn 1th
NOTARY PUBLIC
Watauga County, N
My Commission ExpireZ,
2Z -�„
Sea! My commission expires �(�(� �'I S
STORM-EZ 1 /10/2022
Version 1.5 O&M Agreement Page 1 of 1

Wet Pond Maintenance Requirements
Important operation and 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 pond should be fertilized after the initial fertilization that is required to
establish the plants on the vegetated shelf.
Stable groundcover will be maintained in the drainage area to reduce the sediment load to the wet
pond.
If the pond must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain will be minimized as much as possible.
At least once annually, a dam safety expert will inspect the embankment. Any problems that are
found will be repaired immediately.
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.
After the wet pond is established, it will be inspected quarterly 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 shall be
kept in a known set location and shall be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately.
SCM element:
Potential problem:
How to remediate the problem:
The entire wet pond
Trash/debris is present.
Remove the trash/debris.
Areas of bare soil and/or
Regrade the soil if necessary to remove the gully, plant ground
The perimeter of the
erosive gullies have
cover and water until it is established. Provide lime and a one -
wet pond
formed.
time fertilizer application.
The inlet pipe is clogged
applicable).
(ifThe
Unclog the pipe. Dispose of the sediment off -site.
inlet pipe is cracked
or otherwise damaged (if
Repair or replace the pipe.
The inlet device
applicable).
Regrade the swale if necessary and provide erosion control
Erosion is occurring in the
devices such as reinforced turf matting or riprap to avoid
swale (if applicable).
future problems with erosion.
Sediment has
accumulated to a depth
Search for the source of the sediment and remedy the problem
greater than the original
if possible. Remove the sediment and dispose of it in a
design depth for sediment
location where it will not cause impacts to streams or the SCM.
storage.
The forebay
Erosion has occurred.
Provide additional erosion protection such as reinforced turf
matting or riprap if needed to prevent future erosion problems.
Remove the weeds, preferably by hand. If pesticide is used,
Weeds are present.
wipe it on the plants rather than spraying.

Wet Pond Maintenance Requirements (Continued)
SCM element:
Potential problem:
How to remediate the problem:
Sediment has
accumulated to a depth
Search for the source of the sediment and remedy the problem
greater than the original
if possible. Remove the sediment and dispose of it in a
design sediment storage
location where it will not cause impacts to streams or the SCM.
depth.
The main treatment
Algal growth covers over
area
50% of the area.
Consult a professional to remove and control the algal growth.
p g
Cattails, phragmites or
other invasive plants
Remove the plants by wiping them with pesticide (do not
cover 50% of the basin
spray).
surface.
Best professional
practices show that
pruning is needed to
Prune according to best professional practices.
maintain optimal plant
health.
Determine the source of the problem: soils, hydrology,
The vegetated shelf
Plants are dead, diseased
disease, etc. Remedy the problem and replace plants. Provid
or dying.
a one-time fertilizer application to establish the ground cover if
a soil test indicates it is necessary.
Remove the weeds, preferably by hand. If pesticide is used,
Weeds are present.
wipe it on the plants rather than spraying.
Shrubs have started to
Remove shrubs immediately.
grow on the embankment.
Evidence of muskrat or
Consult a professional to remove muskrats or beavers and
beaver activity is present.
repair any holes or erosion.
The embankment
A tree has started to
Consult a dam safety specialist to remove the tree.
grow on the embankment.
An annual inspection by
an appropriate
professional shows that
Make all needed repairs immediately.
the embankment needs
repair.
Clogging has occurred.
gg g
Clean out the outlet device and dispose of any sediment in a
location where it will not cause impacts to streams or the SCM.
The outlet device
The outlet device is
damaged.
Repair or replace the outlet device.
Weeds or volunteer trees
are growing on the mat.
Remove the weeds or trees.
Floating wetland island
(if applicable)
The anchor cable is
damaged, disconnected
Restore the anchor cable to its design state.
or missing.

Wet Pond Maintenance Requirements (Continued)
SCM element:
Potential problem:
How to remediate the problem:
Erosion or other signs of
damage have occurred at
Repair the damage and improve the flow dissipation structure.
the outlet.
The receiving water
Discharges from the wet
pond are causing erosion
Contact the local NCDEQ Regional Office.
or sedimentation in the
receiving water.

Wet Detention Pond Design Summary
1"1-+ Pond Diagram
WET POND ID
SCM #1
Pretreatment No
other than
Has Veg. Filter? No
FOREBAY
Permanent Pool El.
266.5
Temporary Pool El:
267.75
Clean Out Depth:
6
Sediment Removal E
260.5
Bottom Elevation:
260.5
ATTACH ADDITIONAL SHEETS IF NECESSARY
MAIN POND
Permanent Pool El.
266.5
Temporary Pool El:
267.75
1
Clean Out Depth:
6
Sediment Removal El 260.5
Bottom Elevation: 1 260.5