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 Originally made from bronze or brass, the bearings required oil for lubrication, something that quickly became an environmental issue since the bearings are located near or in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

Interview: Dr. Mark Goulston

Contributed Blogs
Thursday, July 10, 2014
JustListenBY TOM COX | OB BLOGGER

Tom Cox interviews Dr. Mark Goulston, author of Just Listen, Discover the Secret to Getting Through to Absolutely Anyone.


Read more...

Is this employee right?

Contributed Blogs
Wednesday, August 13, 2014
081314 thumb employeefeelingsBY TOM COX | OB BLOGGER

When I say, “Your Employee is Always Right,” I do not mean “right about the facts,” but rather “right about how they feel” and “right about how they want to be led.”


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...

Oversight? Or gaming the system?

News
Monday, July 14, 2014
AmazonBY VIVIAN MCINERNY | OB BLOGGER

Some people think Amazon’s winking eye logo is starting to look like a hoodwink.


Read more...

The Scott Kveton affair

News
Wednesday, July 09, 2014
ScottKvetonBY LINDA BAKER | OB EDITOR

Scott Kveton, the CEO of Urban Airship is taking a leave of absence from the company. As the story continues to unfold, here’s our perspective on a few of the key players.


Read more...

Why I became an Oregon angel investor

Guest Blog
Monday, July 14, 2014
AngelInvestBY TERRY "STARBUCKER" ST. MARIE

I really didn’t know that much about angel investing, but I did know a lot about the entrepreneurial spirit.


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