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Lake County Stormwater Management Commission  

Operations and Maintenance of Stormwater Facilities  

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.

Examples of Proper Maintenance

  • 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).

See also:

  • A Citizen's Guide to Maintaining Stormwater Best Management Practices
  • Homeowners Association Maintenance Responsibilities for Subdivision Stormwater Systems

Photos
Purple loosestrife: Dave Brenner, Michigan Sea Grant 


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