HomeMy WebLinkAboutStormwater Maintenance PlanINSPECTION AND MAINTENANCE FOR
STORMWATER MANAGEMENT FACILITIES
The Property Owners shall be responsible for the maintenance of the stormwater drainage
facilities within the proposed development.
Storm Water Facilities:
1. Retention Ponds collect storm water runoff and store the water until it evaporates and/or
infiltrates into the ground.
2. Detention ponds collect storm water runoff while allowing some water to drain to
another location.
3. Outlets are points where storm water exits a pipe network.
Post Construction Inspection:
1. Inspect stormwater facilities to make sure that they have been adequately stabilized,
seeded, and that erosion of topsoil is not occurring.
2. Observe that pond outlet structures are clear of any material or obstructions in the drainage
slots. Inspect the structure to insure proper drainage following a storm event. Immediately
identify and remove objects responsible for clogging if not draining properly.
Semi-Annual Inspection:
1. Check retention ponds three days following a storm event exceeding ¼ inch of
precipitation. At this point in time water should have percolated and no standing water
should be present within the swale or pond. Clear any clogs in downspouts.
2. Check for grass clippings, litter, and debris in retention and detention ponds. Flush and/or
vacuum storm water structures if excessive material is observed in the facilities.
Standard Maintenance:
1. Remove sediment and oil/grease from retention & detention ponds if noted.
2. Inspect and remove debris from outlet structures, and retention and detention ponds. Use
a vacuum truck to clean outlet structures if necessary.
3. Monitor health of vegetation and revegetate as necessary to maintain full vegetative
cover.
4. Inspect for the following issues: differential accumulation of sediment, drain time, signs of
petroleum hydrocarbon contamination (odors, oil sheen in pond water), standing water,
trash and debris.
Debris and Sediment Accumulation and Removal:
Grass clippings, and any debris, that accumulate in the facilities can be removed with hand tools
during standard landscape maintenance of the property and included in the Owner’s budget for
landscaping the property.
In most cases, sediment from a retention pond does not contain toxins at levels posing a hazardous
concern. However, sediments should be tested for toxicants in compliance with current disposal
requirements and if land uses in the drainage area include commercial or industrial zones, or if
visual or olfactory indications of pollution are noticed. Sediments containing high levels of
pollutants should be disposed of in accordance with applicable regulations and the potential
sources of contamination should be investigated and contamination practices terminated.