B.N.S.F. - Cascade Tunnel[Map] Tunnel under Cascade Mountains on BNSF Railway (former Great Northern Railway) Open to traffic Longest rail tunnnel in the US, finished in 1929 to bypass old tunnel, switchbacks, and 1.7% grade
B.N.S.F. - Rock Island Bridge[Map] Through truss bridge over Columbia River on single track of BNSF Railway in Rock Island Open to traffic Originally built for the Great Northern Railway in 1892, the main span was reinforced in 1925
Great Northern Railway Old Cascade Tunnel[Map] Abandoned tunnel under the Cascade Mountains on abandoned Great Northern Railway grade Abandoned The Original Cascade Tunnel was finished in 1900 and was built to replace a series of 8 switchbacks used to get over the mountains. Deadliest avalanche in US history occurred March 1, 1910 at Wellington (western portal). 96 people killed.
Harlequin Bridge[Map] Lost Baltimore through truss bridge over Stehekin River on Company Creek Road Replaced by new bridge Built 1948, Removed 2000 Replaced 2001
Old Wenatchee Bridge[Map · Street View] Cantilevered through truss bridge over Columbia River carrying a pedestrian walkway and pipeline Open to pedestrians Built 1908; bypassed by new highway bridge in 1950