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US-12: Clearwater Memorial Bridge

The Idaho Transportation Department is making plans to rehabilitate and retrofit the bridge to improve safety, functionality and economic opportunity in the region.

Constructed in 1951, some components of the Clearwater Memorial Bridge are nearing the end of their service life.

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What this project includes

The new bridge deck will include the same number of lanes on US-12 but provide wider shoulders and sidewalks as well as a painted median. As a result of a feasibility study in 2018, ITD will replace the deck using the existing piers.

ITD is completing an environmental analysis to guide the design of the improved bridge.

Final design plans are expected to be completed in 2021, and construction is expected to begin as early as 2023.

fact sheet
After construction the bridge will be wider and able to support more traffic, cyclists and pedestrians Rendering of existing conditions on the bridge Rendering of proposed conditions on the bridge

Community input

Community input is extremely important to ITD’s design process. During the summer of 2020, ITD collected community input in Lewiston. More than 330 community members participated. ITD would like to thank everyone for their input. ITD has reviewed all input and will incorporate it into final design and construction plans.

A cloudy morning looking at the Clearwater River from the top of the Lewiston grade
Spring 2019
Project begins
Summer 2019
Public open house
Summer 2020
Community input
Fall 2020
Environmental document
Winter 2020
Preliminary design
Fall 2021
Final design
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US-12, Clearwater Memorial Bridge

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