Mackenzie River great depths to bedrock. A characteristic feature of the delta is its numerous pingos, or hills of earth-covered-ice – some 1,400 of them. The Peel River, carrying much of the runoff from the northern Yukon, joins in the delta at a point northeast of Fort McPherson. Below there, the Mackenzie diverges into several large channels with the largest heading north-northeast, emptying into the Beaufort Sea west of Tuktoyaktuk. At , the Mackenzie River drainage basin encompasses nearly 20 percent of Canada. About , or 54 percent of the basin, lies above Great Slave Lake. Permafrost underlies about three-quarters of the
Lake Fork Mohican River U.S. Army Corps of Engineers dam causes the river to form Mohicanville Lake. Lake Fork Mohican River The Lake Fork is a tributary of the Mohican River, 14.7 miles (23.7 km) long, in north-central Ohio in the United States. Via the Mohican, Walhonding, Muskingum and Ohio Rivers, it is part of the watershed of the Mississippi River, draining an area of 344 square miles (891 km²). The Lake Fork is formed by the confluence of the Jerome Fork and the Muddy Fork in southeastern Ashland County, and flows generally south-southwestwardly into northwestern Holmes County, where it joins the Mohican River,