Wednesday, January 28, 2015

Willamette River Bridges: Ross Island Bridge

IMG_2128 Ross Island Bridge in Portland, Oregon on June 10, 2006
Ross Island Bridge on June 10, 2006

Though it looks like a deck arch bridge, the Ross Island Bridge is the only cantilever truss bridge in Oregon.

IMG_7503 Ross Island Bridge in Portland, Oregon on July 13, 2007
Ross Island Bridge on July 13, 2007

Despite its name, it does not physically connect to Ross Island in any way and is located about 800 feet north of the island.

IMG_7505 Ross Island Bridge in Portland, Oregon on July 13, 2007
Ross Island Bridge on July 13, 2007

It was designed by Gustav Lindenthal, built by Booth & Pomeroy at a cost of $1.9 million and opened on December 21, 1926.

IMG_7506 Ross Island Bridge in Portland, Oregon on July 13, 2007
Ross Island Bridge on July 13, 2007

The entire bridge is over 3,700 feet long. The cantilever truss is 1,819 feet long, with a 535-foot main span.

IMG_7507 Ross Island Bridge in Portland, Oregon on July 13, 2007
Ross Island Bridge on July 13, 2007

The Ross Island Bridge carries US Highway 26. It was originally owned by Multnomah County, but was transferred to the Oregon Department of Transportation in 1976.

IMG_8553 View of Ross Island Bridge from the Portland Aerial Tram in Portland, Oregon on August 19, 2007
Ross Island Bridge on August 19, 2007

Bridge Type: Cantilever Truss
Opened: December 21, 1926
Designed by: Gustav Lindenthal
Built by: Booth & Pomeroy
Total Length: over 3,700 feet
Truss Length: 1,819 feet
Main Span Length: 535 feet
Construction Cost: $1.9 million
Carries: U.S. Highway 26
Built for: Multnomah County
Owned by: Oregon Department of Transportation

IMG_1013 Portland Spirit under the Ross Island Bridge in Portland, Oregon on December 5, 2009
Ross Island Bridge on December 5, 2009

In this view the cruise boat Portland Spirit is passing under the Ross Island Bridge on December 5, 2009.

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