Timber braced tunnel

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GN - Horseshoe Tunnel (King County, Washington)
Built 1893 bypassed 1929 collapsed on unknown date
Lost Tunnel

Greenbrier River Trail - Droop Mountain Tunnel (Greenbrier County, West Virginia)
Tunnel over Greenbrier River Trail
Open to pedestrians only

Mosier Twin Tunnels (Wasco County, Oregon)
Built 1920, Closed due to rock fall problems 1953, Reopened to public in 2000
Tunnel under Mosier Tunnel on Historical Columbia River Highway Trail
Open to pedestrians

NS - Martin Street Tunnel (Lynchburg, Virginia)
Tunnel under Martin St/ Hillside on NSRR
Open to traffic

Oneonta Tunnel (Multnomah County, Oregon)
Built 1914, Bypassed and Sealed 1948 , Re-Opened to pedestrians 2009; timber lining destroyed by wildfire Sept. 2017
Tunnel under Oneonta Basalt Out-Cropping on Historical Columbia River Highway
Re-Opened to pedestrians in 2009; damaged by fire Sept. 2017

SP - Cascade Summit Wye Tunnel (Klamath County, Oregon)
Built 1926
Lost Tunnel on Cascade Summit Wye Track