Home Archives May 2007 Bonneville Dam's bridge swings easier with new bearings

Bonneville Dam's bridge swings easier with new bearings

| Print |  Email
Tuesday, May 01, 2007

{safe_alt_text}

CASCADE LOCKS — Most Oregonians know it for its fish ladder and its role in Oregon’s hydropower history, but Bonneville Dam is also home to the one of the world’s few concrete swing bridges. All 4 million pounds of it.

Installed in the early 1990s and measuring about 186 feet, the swing bridge stretches across the navigation channel and opens for tugboat traffic. If the bridge goes out of commission, so does all the upper Columbia barge traffic.

The swing bridge, and other dam bridges across the state, are swinging easier these days, thanks to some innovative self-lubricating bearings made by Eugene-based Columbia Industrial Products (CIP).

The bearings, or wear pads, that the bridge rests on are no small engineering feat. Originally made from bronze or brass, the bearings required oil for lubrication, something that quickly became an environmental issue since the bearings are located near or in water. For eight years the U.S. Army Corps of Engineers sponsored a worldwide testing program to encourage development of cleaner, more cost-effective bearings. CIP’s bearings, made of polyester textiles and resins, emerged as the best product because it needed no exterior lubricant. CIP is now a $2.3 million business.   

The new bearings, installed during the annual weeklong lock outage in March, create less friction than previous models and have their own internal lubrication, making them more environmentally friendly. These multi-tasking wonders keep the bridge, and the river traffic, moving. 

— Colleen Moran

Have an opinion? E-mail This e-mail address is being protected from spambots. You need JavaScript enabled to view it

 

More Articles

How to add positivity to your team

Contributed Blogs
Friday, September 12, 2014
happy-seo-orlando-clientsBY TOM COX | OB BLOGGER

I often talk about what leaders can do. What about followers? If you’re a team member and you’d like to add positivity to your team, what might you do?


Read more...

The Alchemist

September 2014
Tuesday, August 26, 2014
BY LINDA BAKER

David Howitt explains why Portland consumer brands like Stumptown and Voodoo Doughnuts are taking the world by storm.


Read more...

Community colleges and sustainability

Contributed Blogs
Thursday, July 31, 2014
sustainabilityBY MARY SPILDE | OB GUEST CONTRIBUTOR

Faced with the aftermath of the “great recession,” increasing concern about the environment and dwindling family wage jobs, we have some very important choices to make about our future.


Read more...

Poll Wrap-Up

News
Friday, August 15, 2014

2014 NewPoll-report-newsletterthumbIn this week's poll, we asked readers: "Who should pay for the troubled Cover Oregon website?" Here are the results.


Read more...

Two sides of the coin

Contributed Blogs
Monday, August 25, 2014
0825 thumb moneyBY JASON NORRIS | OB GUEST BLOGGER

Ferguson Wellman’s investment views on the economy and capital markets.


Read more...

Powerlist: Colleges and Universities

September 2014
Wednesday, August 27, 2014
BY KIM MOORE

A conversation about higher education with the presidents of the University of Oregon and Clackamas Community College, followed by September's powerlist.


Read more...

Podcast: Interview with Steve Balzac

Contributed Blogs
Tuesday, August 19, 2014

082014BalzacBY TOM COX | OB BLOGGER

Tom Cox interviews Steve Balzac, author of "Organizational Psychology for Managers."


Read more...
Oregon Business magazinetitle-sponsored-links-02
SPONSORED LINKS