Isaac Lee Patterson Bridge, Concrete deck arch bridge in Gold Beach, United States.
The Isaac Lee Patterson Bridge is a concrete deck arch bridge in Gold Beach, Oregon, carrying U.S. Route 101 across the Rogue River just before it meets the Pacific Ocean. It consists of seven arches and is listed on the National Register of Historic Places.
Completed in 1932, the bridge was the first in the United States to use the Freyssinet pre-tensioning method for arch construction, a technique developed in Europe. This approach allowed engineers to build longer spans than had been common before.
The bridge's name honours Isaac Lee Patterson, Oregon governor from 1927 to 1929; it was dedicated on 28 May 1932. Its Art Deco detailing includes stepped Moderne pylons at the ends with stylized Palladian windows crowned by sunbursts, and railings using a rectilinear Tuscan order with arches on short ribbed columns.
The bridge is open to vehicles at all times and has two lanes running in both directions. Pedestrians and cyclists can cross it on foot or by bike, but should stay alert as traffic moves continuously.
During construction, a concrete production facility was set up directly on the north bank of the river so materials could be made on site. The reinforcing steel had to be brought in over several miles from Port Orford, which required considerable planning for the time.
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