HomeMy WebLinkAboutSW6190901_O&M Agreement_20190920Operation & Maintenance Agreement
Project Name: Hoke Landing Phase 2
Project Location: Club Pond Road, Hoke County, NC
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 II th t
a a apply & corresponding
Bioretention Cell Quantity:
r
O&M tables wil
Location(s):
Dry Detention Basin
Quantity:
Location(s):
Grassed Swale
Quantity:
Location(s):
Green Roof
Quantity:
Location(s):
Infiltration Basin
Quantity:
Location(s):
Infiltration Trench
Quantity:
Location(s):
Level Spreader/VFS
Quantity:
Location(s):
Permeable Pavement
Quantity:
Location(s):
Proprietary System
Quantity:
Location(s):
Rainwater Harvesting
Quantity:
Location(s):
Sand Filter
Quantity:
Location(s):
Stormwater Wetland
Quantity:
Location(s):
Wet Detention Basin
Quantity:
1
Location(s):
Disconnected Impervious Area
Present:
No
Location(s):
User Defined BMP
Present:
No
Location(s):
UU auueu auiOmaucall
Lot 2
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:
Title & Organization:
Street address:
City, state, zip:
Phone number(s):
Email:
Trina T. Riddle
Member Manager, Hoke Landing 3, LLC
4200 Morganton Road, Suite 150
Fayetteville, NC 28314
910-878-1266
riddlecommercialBaol_com
Signature: OLLD.. Date:
I, - a� r S. A.Q A - 2 S a Notary Public for the State of )bf
County of 'w `p,'pi do hearby certify that I r; nay 1 .
personally appeared before me this day of �, i�t$ 1' I �D and
acknowledge the due execution of the ti s an Mai tena ce Agreement.
Witness my hand and official % seal,
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NOTq
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Sul-Ez
Version 1.4 O&M Manual 8/21/2019
Pan'. I of F
Wet Detention Pond Maintenance Requirements
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.
111aNcciw11 acuviues snail De
perrormea as tollows. Any problems that are found shall be repaired immediately.
BMP element:
Potential problem:
How I will remediate the problem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the BMP
Areas of bare soil and/or
erosive gullies have formed.
Regrade the soil if necessary to remove the gully, and then plant a
ground cover and water until it is established. Provide lime and a one-
time fertilizer application.
Vegetation is too short or too
long.
Maintain vegetation at a height of approximately six inches.
The inlet device
The pipe is clogged.
Unclog the pipe. Dispose of the sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Swale.
Regrade the swale if necessary to smooth it over and provide erosion
control devices such as reinforced turf matting or riprap to avoid future
problems with erosion.
Stone verge is clogged or
covered in sediment (if
Remove sediment and replace with clean stone.
applicable).
The forebay
Sediment has accumulated to
a depth greater than the
original design depth for
Search for the source of the sediment and remedy the problem if
possible. Remove the sediment and dispose of it in a location where it
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
the plants rather than spraying.
The vegetated shelf
Best professional practices
show that pruning is needed
Prune according to best professional practices
to maintain optimal plant
health.
Plants are dead, diseased or
dying.
Determine the source of the problem: soils, hydrology, disease, etc.
Remedy 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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Version 1.4 O&M Manual Page 3 of 5
Wet Detention Pond Maintenance Requirements Continued
The main treatment area
Sediment has accumulated to
a depth greater than the
original design sediment
Search for the source of the sediment and remedy the problem if
possible. Remove the sediment and dispose of it in a location where it
will not cause impacts to streams or the BMP.
storage depth.
Algal growth covers over 50%
of the area.
Consult a professional to remove and control the algal growth.
Cattails, phragmites or other
invasive plants cover 50% of
Remove the plants by wiping them with pesticide (do not spray).
the basin surface.
The embankment
Shrubs have started to grow
on the embankment.
Remove shrubs immediately.
Evidence of muskrat or
beaver activity is present.
Use traps to remove muskrats and consult a professional to remove
beavers.
A tree has started to grow on
the embankment.
Consult a dam safety specialist to remove the tree.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair. (if applicable)
The outlet device
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.
The receiving water
Erosion or other signs of
damage have occurred at the
Contact the local NC Department of Environment and Natural
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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Version 1.4 O&M Manual Page 4 of 5
Wet Detention Pond Design Summary
Wet Pond Diaaram
WET POND ID FOREBAY MAIN POND
BMP-1 Permanent Pool El. 244 Permanent Pool El. 244
Temporary Pool El: 245.75 Temporary Pool El: 245.75
Pretreatment other
No Clean Out Depth: 5 Clean Out Depth: 5
than forebay? Sediment Removal El: 239 Sediment Removal El: 239
Has Veg. Filter? No Bottom Elevation: 238 Bottom Elevation: 238
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Version 1.4 O&M Manual Page 5 of 5