on the Peace, Slave and Mackenzie rivers as far downstream as Fort Good Hope. This has made the Peace Valley more suitable for farming, but has had significant impacts on downstream wildlife and riparian communities. The more stable annual flow slows down the spread of essential nutrients which builds up in the form of sediments, thus causing the river to become more polluted. 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. A potential US$1 billion, 1350 MW hydro plant on the Slave River was canceled in 2010 after an agreement could not be reached with First Nations people in the area to be flooded by the reservoir. The Site C Dam on the Peace River, which would generate enough power for about 460,000 households, has been controversial since the 1970s. As of April 2019, despite multiple legal challenges by First Nations and environmental groups the dam was under construction, with a completion date scheduled for 2024. Tributaries Largest Full list See also List of rivers of Canada List of rivers of the Northwest Territories Peace River Country Steamboats of the Mackenzie River Peel Watershed Works cited References External links Information and a map of the Mackenzie's watershed Canadian Council for Geographic Education page with a series of articles on the history of the Mackenzie River. Atlas of Canada's page devoted to Arctic rivers of Canada. MAGS: Daily Discharge Measurements. Rivers of the Northwest Territories Physiographic provinces Physiographic sections Rivers of Yukon