In November, a pipe ruptured on Dane County's community manure digester, which converts cow waste into power. About 360,000 gallons of manure flowed through a dry ravine, according to Wisconsin Department of Natural Resources spokesman Bob Manwell. The spill entered a creek and reached the village of Waunakee, located more than two miles away, bringing with it an odor.
"As far as environmental damages, there was no immediate fish kill, which is a good sign," Manwell said. About 90 percent of the spill was cleaned up within a week, he said, but some of the spill, located in areas unreachable by equipment, remains.
"We're not saying there were no damages," Manwell said. "This is going to take some time, and we'll continue to monitor to see what impacts there may be."