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The original item was published from 9/11/2020 9:31:00 AM to 9/17/2020 2:00:47 PM.

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Posted on: September 4, 2020

[ARCHIVED] POSTPONED: I-5 Interstate Bridge northbound span closure begins Sept. 12

Interstate Bridge Trunnion Replacement Project Logo

ODOT has postponed the I-5 Interstate Bridge Trunnion Replacement Project to keep the highway system as clear as possible for wildfire evacuees.
ODOT News Release: https://content.govdelivery.com/bulletins/gd/ORDOT-29fb8f1?wgt_ref=ORDOT_WIDGET_8

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At 12:01 a.m. Saturday, Sept. 12, crews will begin closing the northbound span of the Interstate Bridge, which will remain closed until 11:59 p.m. Sunday, Sept. 20 while crews replace mechanical parts that help raise and lower the bridge.

During the nine-day closure, northbound and southbound traffic will share the three lanes and sidewalk on the southbound span. Movable concrete barriers will allow two lanes of traffic in the busiest direction, with two southbound lanes open for the morning commute and two northbound lanes open for the afternoon commute.

The sidewalk on the southbound span will remain open at all times for people walking or riding bicycles.

Ramp closures

During the bridge closure, four ramps in the project area will close for traffic control and to ensure a safe work zone:

  • Marine Drive on-ramp to I-5 north in Portland.
  • Hayden Island on-ramp to I-5 north in Portland.
  • I-5 north to SR 14 off-ramp in Vancouver.
  • SR 14/Washington Street on-ramp to I-5 south in Vancouver.

Signs will direct travelers to detour routes. Learn more on the project website. 

Sept. 21-27: Lane closure on I-5 south

The left lane on the southbound span will close Sept. 21-27 around the clock as crews upgrade the median barrier, remove equipment and wrap up the project.

Other impacts

Before and after the September closure, travelers should expect occasional night lane closures on I-5, up to 30-minute bridge lifts on the northbound span and nighttime ramp closures between Victory Boulevard in Portland and SR 14 in Vancouver.

Learn more

About the bridge

The Interstate Bridge is jointly owned by Oregon and Washington and is maintained and operated by ODOT. The two states are sharing the $13 million cost of this project. The northbound span opened in 1917 and the southbound span in 1958.


About the project

The northbound span of the Interstate Bridge will close from Sept. 12–20, 2020 as crews replace mechanical parts that help lift and lower the bridge. The Interstate Bridge is located on I-5 where it connects Oregon and Washington across the Columbia River.

The bridge closure is scheduled for September in part due to the low river levels, which allow most vessels to travel under the Interstate Bridge without a bridge lift. This is essential for marine traffic, because the Columbia River is an international shipping channel.

Additional Info...
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