The mile-long East River Mountain Tunnel on Interstate 77 opened on Dec. 20, 1974 after five years, four months and 13 days of work. ... News. Today's news; US; Politics; World; Tech.

West Virginia oversaw the tunnel construction and Virginia oversees the day-to-day operations. According to VDOT, Approximately 11.3 million vehicles drive through East River Mountain Tunnel annually.

East River Mountain Tunnel is 5,654 feet long. The tunnel is located 54% in Virginia and 46% in West Virginia. The tunnel is jointly owned and financed by Virginia and West Virginia.