22.175 O&M Plan for Recording196 Cooke Ave
Northampton, Massachusetts Stormwater Management System
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Stormwater Management System
Operation & Maintenance Plan
Broad Brook Greenway Parking Area &
Housing Development
196 Cooke Ave, Northampton, MA
Post-Construction (City-retained property/Boggy Meadow Road)
Stormwater Management System Owner:
City of Northampton
Party Responsible for Operation & Maintenance:
City of Northampton
Inspection & Maintenance Schedule:
1) Water Quality Unit
The water quality unit shall be inspected and maintained according to the manufacturer’s
recommendations. At a minimum, maintenance shall include the following:
Maintenance shall be completed on the structure at least once per year, or more often
based on sediment accumulation. Maintenance or cleaning shall be performed when the
stored volume reaches a 6” depth or 15% of the sump storage capacity. Cleaning shall also
be performed when oil has accumulated to 1 inch or greater depth, or immediately in the
event of a fuel or oil spill. All material removed from the StormCeptor shall be disposed in
accordance with applicable local, state, and federal guidelines and regulations.
Post-Construction (Residential Development Property)
Stormwater Management System Owner:
Developer of the Housing Units
Party Responsible for Operation & Maintenance:
Developer of the Housing Units
Inspection & Maintenance Schedule & Log:
1) Stone Diaphragm Drain
The diaphragm drain shall be inspected at least four times per year and cleaned every three
years or any time collected sediment is visible at the surface. Failure of the system to drain
(ponding after the end of the storm) shall result in inspection and cleaning.
196 Cooke Ave
Northampton, Massachusetts Stormwater Management System
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Inspections shall identify any damage or signs of erosion within and adjacent to drain, which
shall be repaired immediately.
Drain shall be cleaned by removing and replacing pea stone top-dressing and removing any
sediment collected on the exposed filter fabric. Stone may be washed and re-used.
Oil and sediments shall be removed and disposed of in accordance with local, state and federal
guidelines and regulations. It is recommended that sediment removal be performed after the
completion of the spring snow melt.
2) Water Quality Swale
The sediment forebay shall be inspected multiple times in the first few months after
construction, and twice per year thereafter. Sediment or debris shall be cleaned out as needed,
at least annually (preferred time is early spring after snow melt). Inspections shall identify any
damage or signs of erosion within basins or the overflow berm. Damage shall be repaired
immediately.
At least twice per year, mow the buffer area, side slopes, and basin bottom. Remove grass
clippings and accumulated organic matter to prevent an impervious organic mat from forming.
Remove trash and debris at the same time. Use deep tilling to break up any clogged surfaces and
revegetate immediately.
Overflow level spreader curb shall be inspected for signs of erosion or bypassing. Any damage,
erosion, or loss of vegetation shall be repaired immediately. Discharge of underdrain piping shall
be inspected for erosion, damage, or flow blockage.
3) Infiltration Basin
The infiltration basin shall be inspected after every major storm for the first three months and
two times per year thereafter. Sediment or debris shall be cleaned out as needed, at least
annually (preferred time is early spring after snow melt). Failure of the system to drain (ponding
48 hours after the end of the storm) shall result in inspection and cleaning. Inspections shall
identify any damage or signs of erosion within basins or the overflow berm. Damage shall be
repaired immediately.
At least twice per year, mow the buffer area, side slopes, and basin bottom. Remove grass
clippings and accumulated organic matter to prevent an impervious organic mat from forming.
Remove trash and debris at the same time. Use deep tilling to break up any clogged surfaces and
revegetate immediately.
Remove sediment from the basin as necessary but wait until the floor is thoroughly dry. Use
light equipment to remove the top layer so as to not compact the underlying soil. Deeply till the
remaining soil and revegetate as soon as possible. Rake sediment from stone areas and remove.
It is recommended that sediment removal be performed after the completion of the spring
snow melt.
Overflow level spreader curb shall be inspected for signs of erosion or bypassing. Any damage,
erosion, or loss of vegetation shall be repaired immediately.