Hog manure spread too heavily on farmland appears to be the cause of a weekend fish kill on four miles of the Little Floyd River near Sheldon, the Department of Natural Resources said in a statement Monday.
"We found manure ponded on the ground and it appears that, because of over application, manure soaked into the ground and moved through a tile line. Because of the dry conditions in the stream, it does not take much to have a high enough concentration to kill fish," Ken Hessenius, supervisor of the DNR field office in Spencer, said in the statement.
About 2,500 fish, mostly minnows, shiners, darters and chubs, were killed. A beaver dam appears to have slowed the flow of contamination, possibly reducing the impact on the river.
The DNR statement said the agency likely will likely be taking enforcement action against and seeking fish restitution from McCarty Farms, where the manure was spread.