HomeMy WebLinkAboutStormwater Maintenance PlanINSPECTION AND MAINTENANCE FOR
STORMWATER MANAGEMENT FACILITIES
The Property Owner shall be responsible for the maintenance of the stormwater drainage
facilities included within Lot 4, Baxter Lane Subdivision No.1 [Plat H-15]
Storm Water Facilities:
1. Drainage swales slope toward retention and detention ponds to collect storm water
runoff and channel it to the retention or detention pond.
2. Pipe Networks convey storm water to different discharge locations.
3. Outlets are points where storm water exits a pipe network.
4. Retention Ponds are storm water collection facilities that collect and temporarily store
runoff and allow it to infiltrate and evaporate
Post Construction Inspection:
1. Observe that catch basins, and outlet structures are clear of any material or obstructions
in the drainage slots. Inspect these structures 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 facilities three days following a storm event exceeding ¼ inch of
precipitation. Failure for water to percolate within this time period indicates clogging or
poor-draining soils. Clear any clogs and replace any poor-draining soils with well-
draining gravely soils.
2. Check for grass clippings, litter, and debris in drainage swales, catch basins, dry wells,
culverts and retention ponds. Flush and/or vacuum drywells or storm water pipes if
excessive material is observed in the facilities.
Standard Maintenance:
1. Remove sediment and oil/grease from retention facilities.
2. Inspect and remove debris from drainage swales, catch basins, dry wells, and retention
ponds. Use a vacuum truck to clean catch basins.
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.
Sediment accumulation:
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.
Equipment Type/Access:
Ponds will be cleaned using vacuum trucks or other equipment. All vacuum trucks will access the
site through the proposed drive aisle and parking lot.
Cost Estimate:
Depending on the amount of rainfall in the given year, the cost to maintain the stormwater
infrastructure will vary. It is estimated that the ponds will need to have sediment removed once
per year, with an estimated cost of $1,500 to do so. The property owner will be responsible for
financing the maintenance of the stormwater infrastructure.