| Big Walker Mountain Tunnel | |
| Official Name: | Big Walker Mountain Tunnel |
| Lanes: | 4 |
| Location: | Bland County, Virginia, USA |
| Length: | 4229feet |
| Opened: | 1972 |
| Toll: | None |
| Coordinates: | 37.0386°N -81.1308°W |
The Big Walker Mountain Tunnel is a vehicular tunnel in the Appalachian Mountains of Southwest Virginia that carries Interstate 77 through and under Big Walker Mountain. It is located a few miles south of the town of Bland in Bland County and a segment of the Appalachian Trail, and about 20miles south of its longer cousin, the East River Mountain Tunnel.
The 4229feet tunnel was first opened in 1972 after five years of construction labor. It carried a price tag of $50 million (equivalent to $ in), which at the time was the most expensive single project undertaken on Virginia's Interstate system.[1] The opening of the tunnel reduced the travel time from Wytheville to Bland County by 30 minutes.[2]
Preliminary engineering studies for the project were made by Brokenborough & Watkins, consulting engineers of Richmond, Virginia, and the final design of the roadway and tunnel was by Singstad & Kehart, consulting engineers of New York City.
The north tunnel approach and surrounding area can be viewed from the Big Walker Lookout, a 100feet observation tower built on Big Walker Mountain about 5miles west of the tunnel.