Mosier Twin Tunnels
1917-1921 MTT constructed
1920 Signs placed at tunnel entrances saying watch for falling rock and enter at your own risk
1920 MTT lined with timbers to prevent rocks from falling on cars
1931 MTT called unsafe with increasing traffic
1932 Traffic signals for one way traffic installed
1953 MTT deemed unsafe by State Highway Commission
1953 MTT and adjacent highway closed
1954 Rockfall at MTT collapses ceilings and blocks entrances
1954 MTT permanently closed and filled with debris
1954 HCRH/MTT segment located in Wasco County returned to adjacent private property owners. HCRH located in Hood River County maintained by HR
1987 Gorge residents want tunnels re-opened
1995 Work begins clearing backfill and rock debris from tunnels
1997 Rock catch structure installed between tunnels
1997 Cliff Walk between tunnels rebuilt including steel fence and bars restricting access
1999 Rock catch structure completed along west approach to tunnels
The
Coronated
Crowned
Bride
Dalton
Multiple
Ainswo
Dod
Warren
Bonney
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