SW3191101_O&M Agreement/Plan_20231212

Operation & Maintenance Agreement
Project Name: CAMBRIDGE VILLAGE MULTIFAMILY
Project Location: Cresset Dellinger and N.Pilot Knob Rd.
—
CoverPage
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).
INPUT ADDITIONAL DATA ON INDIVIDUAL O&M
The SCM(s)on this project include(check all that apply&corresponding O&M sheets will be added automatically): PLAN SHEETS IF REQUIRED
Infiltration Basin Quantity: Location(s):
Infiltration Trench Quantity: Location(s):
Bioretention Cell Quantity: Location(s):
Wet Pond Quantity: 2 Location(s):NE and SW Comers of the site ADDITIONAL DATA REQUIRED
Stormwater Wetland Quantity: Location(s):
Permeable Pavement Quantity: Location(s): _
Sand Filter Quantity: Location(s):
Rainwater Harvesting Quantity: Location(s):
Green Roof Quantity: _ Location(s):
Level Spreader-Fitter Strip Quantity: Location(s):
Proprietary System Quantity: Location(s):
Treatment Swale Quantity: Location(s):
Dry Pond Quantity: Location(s):
Disconnected Impervious Surface Present: No Location(s):
User Defined SCM Present Yes Location(s): French Drain-Building 7 and parking lot _ ADDITIONAL DATA REQUIRED
Low Density Present No Type:
I 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:
Titre&Organization: Denver-SI,LLC
Street address: 7 Pecker Square,770 3rd Avenue SW
City,state,zip:Indianapolis,IN 46032
Phone number(s):
Email:
` \ �r ` L
Signature::, �/4 t�J } Date: (2 ( 7 '2 3
I, A*, Sh' � otary Public for the State of
Countyof / /�/,P
�GfYJ//j� ,do hereby certify that /� �/� �'�
personally appeared before me this I
day of �a'!f �' and
acknowledge the due execution of the Operations and Maintenance Agreement.
Witness my hand and official seal,
d 00 eu Abb, L. Shaffer
4 Nota Public-State of Indiana
l' F Coun of Residence:Hamilton
. �.�: Corn ission Number:NP0728115
My C.mmission Expires:08-09 2028
Seal My commission expires 0 5/0 4VZO ZCJ
STORM-EZ 12/7/2023
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.
The perimeter of the wet
Areas of bare soil and/or
Regrade the soil if necessary to remove the gully, plant ground
pond
erosive gullies have
cover and water until it is established. Provide lime and a one -
formed.
time fertilizer application.
The inlet pipe is clogged
(if applicable).
Unclog the pipe. Dispose of the sediment off -site.
The inlet pipe is cracked
or otherwise damaged (if
Repair or replace the pipe.
The inlet device
applicable).
Erosion is occurring in the
Regrade the swale if necessary and provide erosion control
swale (if applicable).
devices such as reinforced turf matting or riprap to avoid 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.
Weeds are present.
Remove the weeds, preferably by hand. If pesticide is used,
wipe it on the plants rather than spraying.
Wet Pond Maintenance Requirements (Continued
SCM element: jPotential problem: I 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.
Algal growth covers over
Consult a professional to remove and control the algal growth.
The main treatment area
50% of the area.
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.
The vegetated shelf
Determine the source of the problem: soils, hydrology,
Plants are dead, diseased
disease, etc. Remedy the problem and replace plants.
or dying.
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.
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.
A tree has started to grow
Consult a dam safety specialist to remove the tree.
The embankment
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
Repair or replace the outlet device.
damaged.
Weeds or volunteer trees
Remove the weeds or trees.
a
are growing on the mat.
Floating wetland island
(if applicable)
The anchor cable is
damaged, disconnected or
Restore the anchor cable to its design state.
missing.
VW L 1 VllL 1V1r1111LG11GL11L+W 1\GL., 1.111 GIIIGiiLJ `%J%J31L1J1WV.L.L
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
101
0
Pretreatment other No
than forebay?
Has Veg. Filter? No
WET POND ID
2
Pretreatment other No
than forebay?
Has Veg. Filter?
FOREBAY
Permanent Pool El.
787.5
Temporary Pool El:
788.5
Clean Out Depth:
3.5
Sediment Removal E
784
Bottom Elevation:
783
Permanent Pool El.
777
Temporary Pool El:
778.3
Clean Out Depth:
4
Sediment Removal E
773
Bottom Elevation:
772
Permanent Pool El.
787.5
Temporary Pool El:
788.5
Clean Out Depth:
5.5
Sediment Removal E
782
Bottom Elevation:
781
Permanent Pool El.
777
Temporary Pool El:
778.3
Clean Out Depth:
7
Sediment Removal E
770
Bottom Elevation:
769

User Defined SCM Maintenance Requirements
Section 1
Important operation and maintenance procedures:
The french drains stem is defined as the pipes and stormwater inlet passively collecting and AddlDelete Row
-Itransmitting drainage from Building T and the parking lot to the wet pond.
nspect opening on pipe to ensure free flow of drainage from building and parking lot.
Regularly clean the pipes and drain inlet by manually removing debris.
nspect stormwater inlet drain and surrounding area to assess base flow.
The system will be inspected at least quarterly. Records of operation and maintenance will be kept in a known set
location and will be available upon request.
Section 2
Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately.
SCM element:
Potentialproblem:
How to remediate theproblem:
French drains stem
Base flow too high.
Evaluate flow impact to wet pond SCM; if base flow prevents
temporary pool elevation from returning to the permanent pool
elevation with 5 da s, remediate as needed.
Drain inletloutlet plipes
Pipes are clogged.
Unclog the pipe. Dispose of the sediment off -site.
Stormwater inlet drain
Sedimentidebris in inlet.
Remove the sediment/debris. Dispose of the sediment off -site.
AddlDelete Row