The original of these two twin three-span tied arch bridges was build on the Pacific Highway (U.S. 99) in 1946, while the twin was built in 1958 during the constriction of Interstate 5. Both structures were three-span tied arch structures flanked by six reinforced concrete deck girder approach spans. The 1946 bridge served northbound traffic while the 1958 span served southbound.
(Historical Highway Bridge of Oregon - 1989)
Length of largest span: 240.0 ft.
Total length: 910.1 ft.
Deck width: 30.0 ft.
Vertical clearance above deck: 19.4 ft.
Approximate latitude, longitude
+44.73722, -123.05250(decimal degrees) 44°44'14" N, 123°03'09" W (degrees°minutes'seconds")