Historic Hood River
Whiteson Bridge, 1937
I have no idea what connection this has with Hood River, but it’s an interesting photo and it’s in our archives. The Whiteson Bridge was in Yamhill County, where Highway 99W crosses the Yamhill River near Amity. I was only slightly surprised to find there is a Bridge Failure Database on the internet which gives further details. The cause of this bridge collapse was “Height of truck bigger than maximum headroom of portal frame.” Now we know why they go through such trouble to indicate the maximum clearance on such structures.
If this post sparks further interest in the subject, the database was developed as part of a 2004 doctoral thesis in engineering by Daniel Imhof. In a field rife with technobabble, it is nice to see Dr. Imhof uses chapter headings such as “Why Bridges Fall Down.”