The Fremont Bridge is currently undergoing a repaving project on the top deck. For the first time since this photo was taken in 1973, the epoxy asphalt concrete base layer is being replaced. This view is to the northeast.
The component parts for the main span of the Fremont Bridge were built in California but the final assembly was done on Swan Island, as shown here. It would be lifted into place on March 16, 1973, connecting the east and west banks of the Willamette River. At the time it was the heaviest lift, at 6000 tons, ever completed, and it is the second longest tied arch bridge in the world. Here’s a photo of the east and west ramps under construction, before the center span lift.