This bridge is not a very old example of its type. Its late 1963 construction
date is visually supported by the lack of v-lacing and lattice in built-up
members. This was a period of transition away from rivets. THis bridge has
bolted connections, but the built-up members are of riveted construction.
This bridge serves a freeway near an interchange. To accomodate the ramp
configuration, the north end of the main truss spans splits into two truss
units, one wider than the other, with the narrower truss serving an offramp.
Photo Galleries and Videos: Lewis and Clark Viaduct
Original / Full Size Photos A collection of overview and detail photos. This gallery offers photos in the highest available resolution and file size in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
Mobile Optimized Photos A collection of overview and detail photos. This gallery features data-friendly, fast-loading photos in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
Maps and Links: Lewis and Clark Viaduct
This historic bridge has been demolished. This map is shown for reference purposes only.