SW6201004_O&M Agreement_20210427

Project Name
Project Location
BKackh@VVk Landing
Rockfish Road, Hoke County NC
Maintenance records shall bekept unthe following B[WP(s). This maintenance record shall bekept inalog inuknown set |ooaho
Any deficient BMP elements noted in the inspection will be corrected, repaired, or replaced immediately. These deficiencies can
affect the integrity of structures, safety ofthe pub|ic, and the pollutant removal efficiency of the B[NP(a).
The BK8P(s)onthis project include (check all that apply &co
Bioretention Cell Quantity:
Dry Detention Basin
Grassed Swale
Green Roof
Infiltration Basin
Infiltration Trench
Levm|SpreadenVFS
Permeable Pavement
Proprietary System
Rainwater Harvesting
Sand Filter
StonnwoharVVetland
Wet Detention Basin
Disconnected Impervious Area
User Defined B[WP
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Present:
ig O&M tables will
Looadon(a):
L000don(a):
Looadon(s):
Locahon(s):
Locadon(s):
Locadon(e):
Looation(s):
Louation(o):
Lonution(s):
Locadon(o):
Lmcadon(s):
Locabon(a):
Locadon(s):
Lonadon(o):
Locabon(a):
I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed
for each B[NPabove, and attached O&M tables. | agree tonotify NCDENRmfany problems with the system o/prior toany
changes tothe system urresponsible party.
^ Responsible Party�
Title &Organization:
Street address:
City, state, zip:
Phonanumbor(s:
Email:
Sign
Hendrix Brothers of Hoke LLC
D. Ralph Huff 111, Member/Manager
e of N C
personally appeared before mathis �r day of and
acknowledge the due execution of the Operations and Maintenance Agreement
Witnes hand and official seal,
OW
My commiss2on �pi
)s
wv
COMMISSION EXPIRES
7/412023
Op, PJJBL�G
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O&M Manual
4m6/2U21
Page 1of4

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 iaprovided.
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
-
matebhehUhep|enteonthevegetatedmhe|t
Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention
If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the
emergency drain should beminimized tothe maximum extent practical.
Once ayear, adam 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.Oinches (or i.Sinches ifinaCoastal County). Records ofoperation and maintenance should bekept ina
known set location and must beavailable upon request.
Inspection activities shall be performed aafollows. 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
Regrade the soil if necessary to rernove the gully, and then plant a
erosive gullies have formed.
ground cover and water until 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.
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
Regrade the swale if necessary to smooth it over and provide erosion
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
The forebay
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 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
the plants rather than spraying.
The vegetated shelf
Best professional practices
Prune according to best professional practices
show that pruning is needed
to maintain optimal plant
Plants are dead, diseased or
Determine the source of the problern: soils, hydrology, disease, etc.
dying.
Remedy the problem and replace plants. Provide a one-time fertilizer
application to establish the ground cover if a soil test indicates it is
Weeds are present.
Remove the weeds, preferably by hand. If pesticide is used, wipe it on
the plants rather than spraying.
STORM-EZ 4/202021
Version /�4 O&M Manual Page 2or4

Wet Detention Pond Maintenance Requirements (Contin4ed)
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 it
original design sediment
will not cause impacts to streams or the BMP.
storage depth.
Algal growth covers over 50%
Consult a professional to remove and control the algal growth.
of the area.
Cattails, phragmites or other
Remove the plants by wiping them with pesticide (do not spray).
invasive plants cover 50% of
the basin surface.
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
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)
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
Contact the local NC Department of Environment and Natural
damage have occurred at the
Resources Regional Office.
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.
4�6�O21
8Toem�sc
vemionl.4 O&M Manual Page aof4

Wet Detention Pond Design Summary
Wet PondjLiaqLpm
WET POND ID FOREBAY MAIN POND
WETPONB Permanent Pool El. 185 Permanent Pool El. 185
Temporary Pool El: 187.3 Temporary Pool El: 187.3
Pretreatment other No Clean Out Depth: 6 Clean Out Depth: 9.5
than forebay? Sediment Removal El: 179 Sediment Removal El: 175.5
Has Veg. Filter? No Bottorn Elevation: 178 Bottom Elevation: 174.5
STORM-EZ 4/26/2021
Version 1.4 O&M Manual Page 4 of 4