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Idaho Transportation Department


New Landslide Database Gives Tools for Site Development

The Idaho Geological Survey (IGS) is helping the Idaho Transportation Department (ITD) learn more from landslides in the Gem State. A new statewide inventory database of landslide and rock fall hazards released by IGS in late June will assist ITD, emergency managers and planners with forecasting and hazard mitigation by identifying problematic hot spots....


U.S. 95, ID-53 Construction Project Taking Shape in Idaho

The Idaho Transportation Department (ITD) is reconfiguring several roadways near the current U.S.-95 junctions with ID-53 and Garwood Road north of Hayden. The proposed project will:Construct a new interchange at U.S.-95 and ID-53;Realign and widen ID-53 from Ramsey Road to U.S.-95;Replace the existing deficient ID-53 bridge over the Union Pacific Railroad (UPRR);Provide a grade separation at Garwood Road over U.S.-95 and the UPRR (eliminate direct access to U.S.-95 at Garwood Road);Construct a new east-side frontage road from ID-53 to Garwood Road;Construct an assortment of connector roadways....


Knife River Executes Bridge Slides on I-84

The twin east-west bridges – 112 ft. long, two lanes each – at the Blacks Creek Interchange on I-84 in Ada County, Ida. (20 mi. east of Boise and built in 1963) reached the end of their lifespan and have been replaced – hence the Idaho Transportation Department's (ITD) $12.1 million project awarded to Knife River Corporation that had prefabricated two new bridges off-site that were eventually slid into place....


Knife River Corp. Replacing 80-Year-Old Idaho Bridge

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....


ITD Remembers 1995 Noseeum Creek Flooding on U.S.-12

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....


New Design of U.S. 95 Corridor Coming Soon to Idaho

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....


Population Growth Sparks $340M Treasure Valley Project

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....


Idaho Transportation Department Oversees $17.5M St. Maries, St. Joe Bridge Replacements

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....


ISU Receives $150K Grant to Test Seismic Resiliency of Precast Concrete Bridges

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....


ITD Finds Innovative New Method to Replace 17 Bridges

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....






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