Thousands of fish are reported dead near Dyersville, likely caused by manure washing from an animal feeding operation, the Iowa Department of Natural Resources reported Wednesday.
The fish kill, including white suckers, stonerollers, minnows and creek chubs, was reported Monday, but the caller noticed the dead fish Sunday following a rainfall, the DNR reported.
Searching for the source of the kill, DNR staff started at the Highway 136 bridge in Dyersville and followed dead fish upstream for about five miles to an unnamed tributary of Hickory Creek.
“The likely source of the fish kill is manure washed into the stream from an animal feeding operation in the upper part of the watershed,” the DNR reported.
The DNR probe is ongoing as the agency waits for laboratory test results from water samples. An official count of dead fish will be available later. The DNR will seek enforcement action as appropriate.
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