"1908 Built with swing span, 1989 Vertical lift replaces swing span." [Bridge Hunter] The normal reason for replacing a swing span with a lift span is to more than double the width of the navigation channel.
|Steven J. Brown posted|
Amtrak Cascades #504 at the Willamette River Drawbridge in Portland, Oregon - August 1, 2017.
Adam Hinkle That bridge was converted from a swing bridge to a lift in 24 hrs. The towers and span was pre fabed....but still tearing out the swing span and piers and dreadging and installation of the new span....amazing!
Bob Harbison That was an amazing project. I played a small part in that, we built the track on the new bridge, while it was in a drydock upstream a mile or two from the site.
|HAER ORE,26-PORT,8--45 from or0150|
45. Photocopy of postcard (from copy print at Oregon Historical Society, Portland, neg. no. 74133, ca. 1910) SP&S BRIDGE OVER WILLAMETTE RIVER - Burlington Northern Railroad Bridge, Spanning Willamette River at River Mile 6.9, Portland, Multnomah County, OR