From ODOT-
Our work bridge protects the Willamette River from construction debris. It also provides another vital service: it provides river users with a safe passage by protecting them from the construction activities above.
But there are other hazards people should know about. When the Willamette River rises during the rainy season, which is now upon us, it decreases clearance under the bridge for boaters. Natural debris, such as tree branches, creates another boating hazard when it becomes trapped against the work bridge.
Our contractor removes debris buildup as the river levels drop. They can lift some of it from the bridge deck, but most is removed by workers using a motorboat. Crews cut it loose from the bridge supports and allow it to float down the river. This woody debris naturally improves fish habitat when it lodges along the riverbanks downstream of our project or builds up elsewhere in the river.
Thanks to the skill of the workers who maneuver the boat under the work bridge to dislodge branches, the contractor is keeping the river passable so everyone can enjoy it safely.
Rabu, 31 Oktober 2012
Protecting the river and its users
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