At Milepost 611.30, the new mainline crosses the Willamette River. This location is between Fall Creek Jct. and Dougren.
span #1 - 90' Through Plate Girder,
span #2 - 250' Through Truss Span,
span #3 - 90' Through Plate Girder,
span #4 - 90' Through Plate Girder,
span #5 - 80' Through Plate Girder,
span #6 - 80' Through Plate Girder,
span #7 - 80' Through Plate Girder,
Upstream view of completed bridge
While contruction of the trusses was carried out, falsework for the floor trusses was built across the river using wood piling penetrating 14' into the riverbed. This falsework was needed to build the floor system of the 250' span, and later, the chords and remaining steel work were added. Once the span was completed, the falsework would be removed.
During October 28, 1950, a week long storm dumped over 7 inches of rain. The resulting high water washed away the falsework, causing the 250' Through Truss Span to fall in to the river. Four bents were destroyed, leaving the remaining chords hanging with a 4' to 5' sag. After the remaining bents washed out, the entire span dropped and came to rest 20' downstream. Approximately 325 tons of steel were washed into the river.
Rebuilt span after flooding.
Final construction and painting of the bridge was completed on July 10, 1951
Welcome to Joel's Southern Pacific in The Cascades! If you were directed to this portion of the webpage from an outside source, such as a different webpage, then please click the photo below to go the SP in The Cascades home page.
© Joel Ashcroft