Idaho Transportation Department

Knife River Corporation is constructing the Idaho Transportation Department's (ITD) $7.3 million U.S. 95 Weiser River Bridge Replacement project, which involves rebuilding a two-lane structure that has been in existence for more than 80 years dating back to 1939.

When 400,000 tons of mud, rock, trees and other debris obliterated 1,200 ft. of highway on Nov. 20, 1995, it created "the biggest slide of my career," said Mark Schuster, maintenance foreman of U.S.-12 for the last three decades. "When I got the call from Kati, I'll admit I doubted her." Just weeks on the job, Kati Young was new to Schuster's team, and the one who made the call that Noseeum Creek had overtaken the highway at milepost 124.6.

Several roads at the southern end of the Garwood-to-Sagle U.S. 95 corridor north of Couer D'Alene, Idaho, are being reconfigured as part of a multi-year project to improve traffic flow and safety. The intersection with ID 53 junction near Hayden, Idaho, will be replaced with a unique interchange, while the intersection at Garwood Road will be replaced with an overpass, leaving Lancaster Road as the last signal on U.S.

The Idaho Transportation Department (ITD) has kicked off a $340 million project on the largest highway in the state. The work is happening over 11 miles of I-84 in Ada and Canyon Counties, an area known as the Treasure Valley, the population hub of the state.

Construction crews are finishing work on two bridges in a design-build project in Northern Idaho. The project aims to replace the original structures on Idaho Highway 3 (ID-3) over the St. Maries Railroad and the St. Joe River that have outlived their 50-year design/service life.

The Idaho State University Department of Civil and Environmental Engineering has received a $150,000 grant from the Idaho Transportation Department to test the seismic resiliency of precast concrete bridges. Assistant Professor Mustafa Mashal is principal investigator and Professor Arya Ebrahimpour is co-principal investigator on the project.

When the Idaho Transportation Department identified 17 bridges in Eastern Idaho that did not meet current safety and geometry standards, the agency decided to try a new construction approach that ultimately saved taxpayers millions of dollars and more than a decade in time.

Construction began April 29 on the Lorenzo Bridge on U.S.-20 in Madison County. The bridge rehabilitation is expected to be completed this fall. "This rehabilitation will entail re-surfacing of the bridge deck, replacing the guardrail, improving the bridge approaches and finishing with new pavement," said ITD Project Manager Alecia Johnson.

The Idaho Transportation Department will begin work April 1, 2019 on two bridge construction projects along U.S.-20. The new crossings will be located over Willow Creek in Camas County (MP 164) and Rock Creek in Blaine County (MP 173). During construction, ITD will remove aging culverts and surrounding earthwork at both locations, and construct new crossings over the waterways.

Following a public meeting in November 2018, the Idaho Transportation Department developed a different alternative for the Interstate 90 and Idaho Highway 41 interchange in Post Falls. The new design merges the advantages of the two alternatives that were developed by a special planning team and presented to the public last fall.

Federal Airport Improvement Program (AIP) grants of about $39.5 million will help seven primary (commercial) airports across the state with needed improvements to their passenger and aviation facilities. In addition, AIP grants of almost $10 million will help 18 medium and small General Aviation airports across Idaho maintain and improve their aviation facilities.