Union Street Railroad Bridge, Railroad bridge in Salem, Oregon

The Union Street Railroad Bridge is a vertical-lift structure spanning the Willamette River with moveable towers that allow river traffic to pass underneath. The crossing features a metal framework typical of early 1900s railroad construction techniques.

The bridge was engineered by Waddell & Harrington and built in 1912–13 for the Salem, Falls City and Western Railway, which Southern Pacific controlled from 1912 and officially purchased in 1915. Regular passenger and freight service ended in 1945, and the last train crossed in the early 1990s. Salem bought the bridge from Union Pacific for one dollar in 2003 and reopened it as a pedestrian and bicycle crossing on April 18, 2009.

The bridge is also known as the Portland, Eugene & Eastern Railroad Bridge, because Southern Pacific planned to use that name for an electric interurban network. Its lift span follows the patented Waddell & Harrington design, and the operator's house that once sat atop the span was removed after 1980.

The bridge links Riverfront Park and downtown Salem on the east bank with Wallace Marine Park and West Salem on the west. Its deck is also engineered to carry emergency vehicles, supplementing the Marion Street and Center Street bridges. The lift span has been inoperable since 1980, so no lift operations occur; the crossing closed in November 2009 for lead-based paint removal and reopened on May 15, 2010.

The City of Salem acquired this National Register historic structure from Union Pacific in 2003 for just one dollar, transforming it into a cherished community landmark. This unusual transaction saved the bridge from demolition and gave it fresh purpose.