Federal officials plan to spend $38 million in northern Idaho's Coeur d'Alene River Basin this summer cleaning up toxic pollution left from a century worth of mining in the region.
The Environmental Protection Agency said that up to 125 residential and commercial properties will be cleaned up.
Agency spokesman Ed Moreen says that more than 17 miles of paved roads in eight upper basin communities will be repaired or replaced.
Work will also include water treatment projects and the construction of multiple mine-waste repositories.
The Coeur d'Alene River Basin is one of the nation's largest Superfund sites, with heavy metals poisoning land, streams, wildlife and humans. The wastes washed into waterways and moved downstream, some extending into the state of Washington.