The caption on the photo posted by Brian M said: "Pascal Bridge. (from the Richard Purcell Collection) The Autobahn bridge was blown up by the Germans just a few days before the end of the war. Once the ended, some of the bridge building was performed by the German POWs as can be seen in the photograph. The bridge was named after Tec 4 Pascal of the 157th who drowned during the construction of the bridge. "
On this webage about Harold Whiting, 157th ECB,
http://carol_fus.tripod.com/army_hero_157ceb.html
In the history sketch on that page it says:
"The next major job assigned to the unit was bridging of the Salzach River, west of Salzburg, Austria on the autobahn. The unit was engaged in this project on VE Day."
This may be the Pascal Bridge, but it looks like the 157th had many bridge projects going on that time.