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Who's responsible for trolley bridge's failure?

Trail connection still on the table, but questions linger


by: PHOTO COURTESY OF KOIN TV - After showing signs of failure, crews dragged the old trolley bridge truss out of the Clackamas River and broke it up into pieces on land.Everything seems like it’s back to normal, minus the bridge.

After it appeared to be nearing collapse March 7, the old trolley bridge truss was dragged out of the Clackamas River and broken up on land. Then the Oregon State Marine Board lifted a temporary Clackamas River closure March 12 after Union Pacific crews took down and dismantled the steel trusses obstructing boat traffic.

Although other options to link the two trails remain on the table, people working to join the Milwaukie-to-Gladstone Trolley Trail to Oregon City’s waterfront path were disappointed at the demolition of the railroad company’s trolley bridge. Showing up at the Gladstone City Council meeting last week, they wanted to know why no one took action earlier to reinforce the rickety bridge and why it started to fall now, when rising waters weren’t as high as in recent flood years.

County Commissioner Paul Savas was among those who lamented the loss of the bridge when Oregon City officials had indentified the bridge abutment as compromised for more than a decade. A common theory is that Lake Oswego-Tigard Water Project’s installation of a cofferdam for constructing a Clackamas River pump station pushed the water current to the opposite side of the river just downstream, expediting the bridge’s collapse.

“There’s probably some connection between the cofferdam and the demise of the bridge much sooner than anyone expected,” Savas said.

Engineers have been evaluating the situation, but the public may never know for sure, and there were various factors at work.

“It’s not just a coincidence that they put in this dam, realigned the river and all of a sudden the bridge drops,” said Gladstone resident Les Poole. “You don’t have to be an engineer to realize that.”

LOT spokewoman Katie Fulton said, “I know that there have been suggestions about that, but we’re not making any statements about the possible correlation between the cofferdam and the bridge.”

It’s unlikely that Lake Oswego would face a lawsuit anyway.

“I don’t know if the railroad has insurance that would be good enough to cover their costs for dismantling the bridge,” Savas said. “There might be some request for recovery of cost, and then we’ll know more.”

Union Pacific spokesman Mark Davis said the railroad doesn’t yet have a cost estimate regarding the removal of the bridge. So it could be awhile before the railroad can talk with its insurance company and determine any possible next step for full reimbursement.

“Usually when there is an emergency like this, we do not have the billing in from the contractors for several months,” Davis said.

Before the abandoned bridge was pulled down, Gladstone received a $200,000 grant to look into using it to connect a walking and biking path to the Oregon City trail. When the renovated Trolley Trail was opened in 2012, the number of people walking along it increased from 14 per hour to 48.

Trail planner Robert Spurlock says Metro will continue looking at all options to link the two trails: from using the Southeast 82nd Avenue bridge, upriver; to using the bridge downriver that carries Highway 99 East; or maybe even building a new bridge.

Crews are continuing to prepare supports and scaffolding for the next stage of forming the pump station floor decking. Once the cofferdam cleanup is complete, a concrete pour will occur for the interior struts of the intake.

Neighbors may notice an increase in noise and truck traffic during the concrete pour. Starting last weekend, work hours increased to six days a week, from 7 a.m. to 6 p.m. Monday to Saturday.

Kristian Foden-Vencil of OPB contributed to this report.



Local Weather

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64°F

Lake Oswego

Light Rain

Humidity: 90%

Wind: 8 mph

  • 23 Sep 2014

    Heavy Rain 72°F 60°F

  • 24 Sep 2014

    AM Showers 67°F 55°F