Typical inspection/maintenance frequencies for stormwater wetlands Typical inspection/maintenance frequencies for stormwater wetlands

Typical inspection/maintenance frequencies for stormwater wetlands
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Inspection Items	Maintenance Items	Frequency
Ensure that at least 50% of wetland plants survive. Check for invasive wetland plants.	Replant wetland vegetation	One time - After First Year
Inspect low flow orifices and other pipes for clogging Check the permanent pool or dry pond area for floating debris, undesirable vegetation. Investigate the shoreline for erosion Monitor wetland plant composition and health. Look for broken signs, locks, and other dangerous items.	Mowing – minimum Spring and Fall Remove debris Repair undercut, eroded, and bare soil areas.	Monthly to Quarterly or After Major Storms (>1”)
Monitor wetland plant composition and health. Identify invasive plants Assure mechanical components are functional	Trash and debris clean-up day Remove invasive plants Harvest wetland plants Replant wetland vegetation Repair broken mechanical components if needed	Semi-annual to annual
All routine inspection items above Inspect riser, barrel, and embankment for damage Inspect all pipes Monitor sediment deposition in facility and forebay	Pipe and Riser Repair Forebay maintenance and sediment removal when needed	Every 1 to 3 years
Monitor sediment deposition in facility and forebay	Forebay maintenance and sediment removal when needed	2-7 years or 50% loss of sediment forebay storage
Remote television inspection of reverse slope pipes, underdrains, and other hard to access piping	Sediment removal from main pond/wetland Pipe replacement if needed	5-25 years