No doubt you’ve noticed the lovely new bridge on 99e with its pointed spheres and art deco elements. Here’s a pic of its predecessor from the 1930s:

From the ODOT site:

The original Martin Luther King, Jr., Boulevard (Union Avenue) portion of the structure was built by Hoffman Construction Company of Portland in 1936, at a cost of $459,000. This Roosevelt-era Works Progress Administration project brought many needed jobs to Portland-area residents. The Grand Avenue couplet was added to the viaduct in 1965.  The viaducts provide Oregon Route 99E with a grade-separated crossing over the Union Pacific Railroad tracks.

For other pics, go here.