Bio-Retention Raingarden and Infiltration Swale
This project included native grass plantings, wildflower and shrub plantings, hardwood mulch, underdrain system, outlet structure with tile, and sand filter in swale.
The Installed Raingarden on the Property
Year Completed:
2012
Major Watershed:
North Fork Crow River
The landowners approached the Stearns Conservation District about managing stormwater on their property on Lake Koronis. The Stearns Conservation District and West Central Technical Area designed a system to treat runoff directly impacting Lake Koronis from the road, driveways, homes, garages, and sidewalks.
To address the poorly drained soils on-site, an underdrain with an overflow outlet was installed in 2012 as part of a stormwater drainage system. This system channels rainwater to an infiltration swale along the property line and ultimately to a shared raingarden.
Benefits:
Sediment reduction
Nutrient reduction
Wildlife habitat
Landscaping feature
Pollution Reduction Estimates:
Phosphorus: 0.05 lbs./yr.
Sediment: 16 tons/yr.
Partners on this project included the landowner, Stearns Conservation District, and the West Central Technical Service Area (WCTSA).
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