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US-95: Thorn Creek Road to Moscow

Expanding the highway to four lanes on a new alignment will not only add capacity and reduce travel times but also significantly improve safety.

Construction will begin in March 2022.

New alignment
Work begins March 2022
M.A. DeAtley
low bidder for $57.7 million
Contact us


Construction is expected to take three years, with work in the first year focusing on the southern end of the project. Since the highway is being rerouted to the east, impacts to drivers will be minimal and they will have two paved lanes throughout most of construction.

Work in 2023 and 2024 will build a bridge over Eid Road and pave the new set of lanes. Each season of construction will generally occur between March and October.

Drivers will be able to take the new route in fall of 2024.

Envision the new route

The new alignment will tie in at Reisenauer Hill, where the current four-lane section ends, and reconnect near the grain bins on the south end of Moscow.

Compared to the existing route, after construction US-95 will ascend at a more gentle grade up Reisenauer Hill to the prairie below Paradise Ridge. The highway will cut through small hills below the ridge to maintain a consistent grade, cross over Eid Road via a bridge and descend into Moscow.

Generally, US-95 will be shifted to the east less than three-quarters of a mile, and ITD is in the process of relinquishing its jurisdiction of what will be old US-95 to North Latah Highway District.

With a flatter grade and fewer approaches, the new route will provide safer travel between Moscow and Lewiston.

Map of new route (E-2)

Design details

About 6.5 miles of highway will be expanded to four lanes divided by a 34-foot median in the rural section. Shoulders will be widened, curves will be made easier to navigate and the grade will be less steep. New ditches will keep precipitation from gathering on the roadway, and a 30-foot clear zone will provide a safe area if a vehicle goes off the road.

County road intersections will have right and left turn lanes, and some current access points will be combined to limit the number of new intersections and driveways.

In the urban section just south of Moscow, a center turn lane, curbs, gutters and sidewalks will be added.

Leading Idaho

As part of Governor Brad Little’s “Leading Idaho” initiative, the 2021 Idaho Legislature dedicated $126 million of one-time funds from Idaho’s budget surplus to transportation projects statewide. The funds were split 60/40 between ITD and local jurisdictions. This project is partially paid for with ITD’s portion of the funds that will accelerate projects to replace bridges, restore pavements, and improve mobility in communities across Idaho.

More on Leading Idaho funding
ITD begins EA with FHWA to expand US-95 from top of Lewiston Hill to Moscow
Alternative for corridor selected
Project litigated by PRDC, and ITD starts EIS for Thorncreek to Moscow
ITD holds public meetings to identify issues
Workshops allow public to consider multiple alternatives
11 alternatives reduced to three (and a no-build option) after an open house
Southern portion completed in October; ITD prepares draft EIS for Thorncreek
Draft EIS approved by ITD and FHWA
Hearing for draft EIS held with extended comment period; responses to comments sent
December 2014
Final EIS and selected design published and sent for internal and legal review
March 2016
FHWA issued ROD, giving ITD authority to begin final design and purchase land
April 2017
PRDC files lawsuit
August 2017
U.S. District Court rules in favor of ITD and FHWA
January 2018
PRDC appeals
December 2018
The Ninth Circuit of Appeals rules in favor of ITD and FHWA
October 2021

ITD seeks bids

ITD now seeking bids through October 2021, bringing the project one step further to construction.

Read more
March 2021

Wetlands permit approved

On March 9, the U.S. Army Corps of Engineers granted ITD a wetlands mitigation permit. Now ITD will finish right-of-way acquisition so the project can be put out for construction bids, possibly for construction in late 2021.

News story
February 2021

Revised permit application

As of February 2021, ITD has submitted a revised 404 permit application to the U.S. Army Corps of Engineers.  Once the permit is issued, ITD will finish right-of-way acquisition, and the project can be put out for construction bids, possibly for construction in late 2021.As of Ma

April 2020

Revising wetland report

ITD gathered information to update its wetland report in order to submit a revised 404 permit application with the U.S. Army Corps of Engineers. Following that application, ITD will finish right-of-way acquisition. After those two steps are completed, the project can be put out for bids, possibly for construction in 2021.

December 2018

Expansion gets green light

The Ninth Circuit of Appeals ruled in favor of ITD in the latest appeal. Work will continue on final design plans and acquisition of right of way.

News story


M.A. Deatley Construction out of Clarkston, WA, is the apparent low bidder at $57.7 million as of November 9, 2021.

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US-95 Thorncreek to Moscow: contact us

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