Mackenzie River down the spread of essential nutrients which builds up in the form of sediments, thus causing the river to become more polluted. Other smaller hydroelectric plants are located along the Snare and Taltson River tributaries, providing power to mines in the Great Slave Lake region. There have been many proposals to dam the tributaries of the Mackenzie River which would lead to further impacts on water quality and seasonal flow patterns. The Site C Dam on the Peace River, which would generate enough power for about 460,000 households, has been controversial since the 1970s, and a final decision on the
Bear River (Great Salt Lake) passing through Evanston then weaving along the Utah-Wyoming state line as it flows north. It turns northwest into Bear Lake County, Idaho and flows through the Bear Lake Valley in Idaho, past Montpelier where it receives the short Bear Lake Outlet Canal that drains Bear Lake, which straddles the Idaho-Utah border. At Soda Springs, near the north end of the Wasatch Range, the Bear River turns abruptly south, flowing past Preston in the broad Cache Valley that extends north from Logan, Utah. It re-enters northern Utah, meandering south past Cornish and Newton. It is impounded to form the Cutler Reservoir,