Sauvie Island Bridges on April 26, 2008
The Sauvie Island Bridge actually crosses Multnomah Channel, the body of water that diverges from the Willamette River just before it joins the Columbia and separates Sauvie Island from the Oregon mainland before joining the Columbia itself a few miles downriver.
Sauvie Island Bridges on April 26, 2008
Multnomah Channel may have once been the main channel of the Willamette River, and it is so closely associated with the Willamette River that I am counting the Sauvie Island Bridge as a Willamette River Bridge.
Sauvie Island Bridges on April 26, 2008
The original Sauvie Island Bridge was designed by the Oregon Department of Transportation and was constructed in 1950 at a cost of $900,000.
Sauvie Island Bridges on April 26, 2008
The bridge opened on December 30, 1950, replacing the Sauvie Island Ferry, and was transferred to Multnomah County on August 9, 1951.
Old Sauvie Island Bridge on April 26, 2008
The overall length of the entire bridge was 1,198 feet. The main span was a 200-foot long steel Parker through truss bridge, with an overall width of 41 feet, including two 13-foot traffic lanes, without shoulders, and two four-foot sidewalks.
Sauvie Island Bridges on April 26, 2008
200-foot deck truss spans were on each end of the main span, with the ends of the bridge consisting of reinforced concrete deck girders on concrete piers.
Old Sauvie Island Bridge on April 26, 2008
The bridge was not designed to support the weight of modern trucks. Cracks were discovered in the approach spans in 2001, and repairs completed in 2002 allowed the bridge to remain in service until a new bridge could be constructed.
Sauvie Island Bridges on April 26, 2008
| Bridge type: | Parker through truss/deck truss |
| Opened: | December 30, 1950 |
| Designed by: | Oregon Department of Transportation |
| Total Length: | 1,198 feet |
| Main Span Length: | 200 feet |
| Width: | 41 feet |
| Vertical Clearance: | 80 feet |
| Carried: | NW Sauvie Island Road |
| Owned by: | Multnomah County |
New Sauvie Island Bridge Arch at Terminal 2 on July 13, 2007
The new Sauvie Island Bridge was designed by David Evans & Associates. The $38 million project began in December 2005. The main arch is 365 feet long, 77 feet tall and weighs 1600 tons. The arch was fabricated by Fought and Company of Tigard, assembled there, then disassembled and moved by truck to Terminal 2 at 3556 NW Front Avenue in Portland, where it was reassembled.
New Sauvie Island Bridge on April 26, 2008
The arch is held together by over 80,000 bolts. After being placed on the barge at Terminal 2, the arch was jacked up 70 feet above the deck of the barge, supported by hydraulic jacks and a tropical hardwood called ekki.
New Sauvie Island Bridge on April 26, 2008
The move was originally scheduled for October 2007, but due to the availability of the Western Carrier, one of the few barges capable of both carrying the arch and fitting in Multnomah Channel, concerns about spawning salmon and other delays, subcontractor Dix/Norsar didn't take the arch on its 2-hour trip from Terminal 2 eight miles downriver to Sauvie Island until December 28. In transit, the bottom of the arch was about 90 feet above the water and the top of the arch 167 feet above the water.
New Sauvie Island Bridge on April 26, 2008
Multnomah County's 70-year-old senior bridge engineer Ed Wortman delayed his retirement to supervise the project. Wortman was the chief engineer in charge of lifting the main span of the Fremont Bridge in 1973, which was the largest bridge lift ever attempted at the time.
New Sauvie Island Bridge on April 26, 2008
The new Sauvie Island Bridge opened on June 23, 2008. The total cost was $43 million. With the opening of the new bridge, the original Sauvie Island Bridge was demolished and scrapped in August, 2008.
Sauvie Island Bridges on April 26, 2008
| Bridge Type: | Steel Tied Arch |
| Opened: | June 23, 2008 |
| Designed by: | H2L2 Architecture David Evans & Associates |
| Fabricated by: | Fought & Company, Tigard, OR |
| Built by: | Max J. Kuney Company |
| Main Span Length: | 360 feet |
| Arch Height: | 77 feet |
| Vertical Clearance: | 80 feet |
| Width: | 66 feet |
| Cost: | $43 million |
| Carries: | NW Sauvie Island Road |
| Owned by: | Multnomah County |
This concludes the original content of my PORTLAND PLACES: Willamette River Bridges page. To see additional blog entries about Portland, click on the Portland label.
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