Primghar, Iowa — The DNR has completed their investigation of a fish kill that allegedly started at Summit Dairy near Primghar, and hundreds of thousands of fish are now thought to have died due to the spill.
Initially reported as affecting five, then 12 miles of Mill Creek, a manure discharge from Summit Dairy killed fish for 28 miles of stream. The DNR found elevated levels of ammonia and low levels of dissolved oxygen, along with 865,940 dead fish along the creek beginning west of Primghar in O’Brien County.
Most of the fish were minnows, shiners, dace and chubs. However, DNR fisheries found 4,510 dead catfish, 2,479 sunfish, 459 largemouth bass and 45 smallmouth bass. The fish restitution total is $158,551.63, with investigation costs of $1,945.73 for a total of $160,497.36.
The DNR will take enforcement action and pursue compensation for the fish.