The Elk is formed in the Allegheny Mountains in Pocahontas County by the confluence of two short streams, the Big Spring Fork and the Old Field Fork, which join near the community of Slatyfork. It flows above ground for several miles before it sinks into a network of caverns and flows underground for more than five miles. The old riverbed of solid rock, however, remains above ground in this section known as "The Dries." It follows a generally westward course across the unglaciated Allegheny Plateau, through Randolph, Webster, Braxton, Clay, and Kanawha Counties, past the towns of Webster Springs, Sutton, Gassaway, Clay, Clendenin, and Elkview before joining the Kanawha River at Charleston.
The Elk's largest tributaries are the Holly River and the Birch River, both of which join it in Braxton County.
The upper portion of the river, above Sutton Lake, is a popular coldwater trout stream. Some reports of a 2013 Wake Forest University study of selenium contamination in Sutton Lake in North Carolina (allegedly due to coal ash from the Sutton power plant of Duke Energy). erroneously attributed this contamination to Sutton Lake in West Virginia.[7] Sutton Lake in North Carolina is on the Cape Fear River; whereas Sutton Lake in West Virginia is on the Elk River, an entirely different river drainage basin.
[8][9]
Below Sutton Lake, is a high-gradient warmwater fishery well known for its muskellunge, walleye and smallmouth bass fishing. The Elk River serves as the source of water for 1500 miles of pipeline that carry its water to customers in central and southwestern West Virginia.[10]
In January 2014 a spill of the chemical 4-methylcyclohexane methanol, a foaming agent used as a wash component in the coal-preparation process, required West Virginia authorities to supply water to as many as 300,000 people in nine of the state's counties.[12] The effect of the Elk River chemical spill to the critically endangered diamond darter fish, known only to live in the Elk River, is still unknown.[13]
^Stuart A. Welsh & Robert M. Wood (14 Jan 2008). "Crystallaria cincotta, a new species of darter (Teleostei: Percidae) from the Elk River of the Ohio River drainage, West Virginia". ZOOTAXA ISSN 1175-5334 (online edition) (Magnolia Press) (1680 (2008)): 62–68
