No fish kills were reported Thursday, but the agency will continue to monitor the creek, Althoff said.

Grant County Health Department director Jeffery Kindrai said it’s possible the ground is frozen sufficiently to keep contamination from reaching well intakes for the time being.

Randy Mouw, who owns Misty Morning Dairy, said Friday the farm is working with the DNR to ensure the spill is "completely contained and cleaned up."

"We have also reached out to our neighbors to explain what happened and help them in any way we can,” he said in a statement.

Wood Road resident Chuck Horn said he saw the spill around 7:30 a.m. when he went outside to check the bird feeder in front of his house. A stream of manure roughly 7 inches deep and 18 inches wide was moving over snow and ice that covered a spring flow in his yard, he said.

The spring empties into the creek, which is also known as the Fennimore Branch of the Blue River. The best trout fishing is a few miles downstream, Horn said.

He said he had a strong reaction to seeing where the manure was heading. “You can’t print it in the paper,” Horn said. “Just say I was disappointed, and I kind of had an inkling where it was coming from.”