Inspection action recommendations | Minnesota Stormwater Manual

**Inspection action recommendations (Source (adapted):** **USEPA Stormwater Wet Pond and Wetland Management Guidebook** **(USEPA, 2019).**
Frequency Recommendation	Inspection items
Monthly to Quarterly or After Major Storms (>1”)	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 Look for broken signs, locks, and other dangerous items
Several Times per Hot/Warm Season	Inspect stormwater ponds for possible mosquito production
Semi-annual to annual	Identify invasive plants Ensure mechanical components are functional
Every 1 to 3 years	Complete all routine inspection items above Inspect riser, barrel, and embankment for damage Inspect all pipes Monitor sediment deposition in facility and forebay
2 to 7 years	Monitor sediment deposition in facility and forebay
5 to 25 years	Remote television inspection of reverse slope pipes, underdrains, and other hard to access piping