Routine and non-routine maintenance is necessary in ensuring the longevity of all stormwater best management practices (BMPs). Action must be taken as soon as a problem occurs to limit the potential negative impacts. There will be possible cost-savings in the long run as a result of well-maintained BMP structures as well as overall improved water, aesthetics, and air quality.
- Regularly inspect and clean out debris from inlet and outlet areas (monthly);
- Mow routinely unless there is native vegetation (as needed);
- Check your rain garden, vegetated swale or naturalized detention with native vegetation to ensure that the plants are adequately established;
- Consider periodic burns on a bi-annual schedule or yearly in early spring or late fall for native vegetation;
- Remove non-native vegetation like purple loosestrife.
- Remove woody vegetation from all embankment areas (as needed);
- Stabilize/revegetate side and bottom areas in detention basins and pollution contributing areas to reduce incoming sediments (as needed);
- De-thatch grass to remove accumulated sediment and debris (every 2 years);
- Aerate compacted areas to promote infiltration (every 2-3 years);
- Monitor sediment accumulations, and remove sediment when the pool volume has become significantly reduced (roughly 15-20% of the basin) or when the basin becomes stagnant (semi-annual inspection, remove sediment 2-10 years for dry basin and 5-15 years for wet basins);
- Replace BMP mechanical components, reconstruct embankments and spillways (every 20 years if maintained);
- Inspect for invasive species, replace non-native vegetation with native vegetation (monthly); and
- Replant wetland plants if not sufficiently established (as needed).
- A Citizen's Guide to Maintaining Stormwater Best Management Practices
- Homeowners Association Maintenance Responsibilities for Subdivision Stormwater Systems
Purple loosestrife: Dave Brenner, Michigan Sea Grant