Success with Iron-Enhanced Sand Filters
A recent ACD inspection shows the Oak Glen Creek Pond and Iron-Enhanced Sand Filter (IESF) are working as intended to keep pollution out of Oak Glen Creek and the Mississippi River. Since 2017, the Oak Glen Creek Pond and IESF, in the City of Fridley, have been cleaning stormwater from a 520-acre watershed. Stormwater flows into the pond where sediment and debris settle out, then through the IESF, where dissolved phosphorus binds to iron, preventing this algae-fueling nutrient from reaching downstream waters. (see picture below)
The combination of settling in the pond and phosphorus capture in the IESF is designed to significantly reduce sediment and nutrient pollution, helping keep Oak Glen Creek and the Mississippi cleaner, clearer, and healthier. This project was made possible through partnerships among the City of Fridley, the Coon Creek Watershed District, the Clean Water Fund, and a private company that donated an easement. For more information contact Mitch Haustein, Stormwater & Shoreland Specialist, at
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