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I-84, Blacks Creek Interchange

The bridge has reached the end of its lifespan and is in need of replacement

The replacement bridges were constructed off of the roadway and then slid into place.

Ramps have also been upgraded to meet standards for the 80 MPH speed limit.
Work is substantially complete, and is on track to be entirely wrapped up by late fall 2020.

Estimated Completion
Fall 2020
Construction Cost
Current Conditions
Check 511

Innovative Bridge Construction

This project will be executed using an Accelerated Bridge Construction method known as Slide-In Bridge Construction. The new bridges will be constructed off to the side of the interstate. Once complete, traffic will be shifted to one side of the interstate, the old bridge demolished, and the new bridge slid into place. The same method will be repeated for the other bridge.

In comparison to traditional bridge construction methods, Slide-In Bridge Construction significantly reduces the amount of time each bridge needs to be closed, providing greater safety, mobility, and economic opportunity for Idaho.

This step of the project is anticipated to start in summer 2020.

Watch the process for a bridge in McCall

Traffic Impacts

Interstate 84

Blacks Creek Road

For current project impacts, visit Idaho 511
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