Chinchaga River Chinchaga River Chinchaga is a river in north-western Alberta. It is a tributary of the Hay River. Through the Hay River, its waters are carried to the Arctic Ocean via Great Slave Lake and Mackenzie River. The name Chinchaga is First Nations, and means "Big Wood River". Much of the Chinchaga watershed burned in 1950 during the Chinchaga fire. Chinchaga River originates in the Chinchaga Lakes, a series of small lakes in the muskeg of north-eastern British Columbia, at an elevation of 795 m. It flows east into Alberta, then continues north-east until west of Keg River, where it turns
Mackenzie River the northwest, establishing the present flow direction to the Arctic. Fluvial deposits and other erosional evidence indicate that around the end of the Pleistocene, about 13,000 years ago, the Mackenzie channel was scoured by one or more massive glacial lake outburst floods unleashed from Lake Agassiz, formed by melting ice west of the present-day Great Lakes. At its peak, Agassiz had a greater volume than all present-day freshwater lakes combined. This is believed to have disrupted currents in the Arctic Ocean and led to an abrupt 1,300-year-long cold temperature shift called the Younger Dryas. The Mackenzie carries a very large