Coal ash spilled into Lake Michigan after a bluff collapsed below a coal power plant. But experts tested the waters and say the coal ash is so diluted that it should pose no threat to human health. The Sierra Club is suing the power plant owner. The group claims the company is violating the state's environmental laws and alleges the coal ash does pose a serious threat to health and the environment.
Search for Jayme Closs centers on 13-mile stretch west of Barron
The sheriff's office asked for 100 volunteers.