The Minnesota Pollution Control Agency is investigating a fish kill along about 10 miles of the West Fork Beaver Creek south of Danube in Renville County, west of the Cities.
The West-Central Tribune reports “a lot of dead fish and scummy water in Beaver Creek” was called in to the MPCA Wednesday evening. By Thursday morning, observers saw many dead fish and other aquatic life, including northern pike, smallmouth bass, creek chubs, suckers, bullheads, shiners and other minnows, as well as crayfish and dragonflies, the paper reports.
Friday, Southern Minnesota Beet Sugar Cooperative near Renville reported that a valve in its wastewater treatment system had been left open Wednesday night. That resulted in untreated water being discharged into a ditch that goes into the creek, reports the Star Tribune.
The MPCA says the level of dissolved oxygen in the creek had dropped well below that needed to sustain aquatic life, according to WQOW. Investigators don't believe there were toxic chemicals in the creek.