Twin Branch tunnel, was constructed through a sandstone mountain in approximately 1890, using primitive methods. The interior portion of the tunnel has a rough texture with no liner installed. The minimum horizontal clearance in the tunnel is 17 feet and the minimum vertical clearance is 18 feet 6 inches. The total length of the tunnel is 190 feet and is used by one traffic lane. It is on a curved roadway with limited sight distance and has no lighting and was built by Edge Moor Bridge Works of Edgemoor, Delaware in 1890. Information was pulled from the WV DOT.

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