Construction at System Interchange halfway complete

The historic rebuild of the System Interchange in Pocatello is nearing the halfway point, and motorists will continue to see progress in the coming year.

Major milestones for the upcoming season include building five new bridges and demolishing one bridge. Bridges will be constructed to carry southbound traffic on Interstate 15, traffic over Chubbuck Road and traffic heading east on Interstate 86 to access northbound I-15.

As crews come back from the holidays, next up for the project will be drilling concrete shafts for the foundations of the new southbound bridges on I-15. Each shaft will be 8 feet in diameter and drilled up to 60 feet deep to support the weight of I-15 passing overhead. Motorists will also notice construction of retaining walls for the new ramp from I-86 eastbound to I-15 northbound.

This winter crews will be in multiple locations throughout the worksite. Motorists are reminded to follow posted speed limits and watch for work vehicles entering and leaving the interstate at any time day or night.

Originally built in the 1960s, the interchange is undergoing a $112 million redesign to improve safety and replace aging infrastructure. These safety improvements include:

Redesigning ramps to have drivers trying to head northbound on I-15 from I-86 merge from the right, rather than the left.
Traffic from Pocatello Creek Road will no longer have to cross three lanes to head to Chubbuck. Instead drivers will travel under the northbound and southbound lanes of I-15.
Chubbuck Road will be transformed from an overpass into underpass. This means oversized vehicles will no longer have to detour off the interstate. Those who walk and bike will also be better able to travel from Chubbuck to the Portneuf Wellness Complex on the east side of the interstate.

Construction is slated for completion in 2025. Those wishing to learn more about the project can visit the website at https://itdprojects.idaho.gov/pages/i-86i-15-system-interchange.

Nighttime detours start for System Interchange

aerial view of I-86/I-15 system interchange

Beginning Saturday evening drivers should expect various nighttime detours through next week at the System Interchange in Pocatello as crew demolish old bridges on southbound Interstate 15.

Two detours are scheduled for two nights each.

Eastbound travelers on Interstate 86 trying to head north on Interstate 15 will be detoured to the Pocatello Creek Interchange the following nights:

Saturday, Dec. 16, from 9 p.m. to 7:30 a.m.
Sunday, Dec. 17, from 7:30 p.m. to 7:30 a.m.

Northbound travelers on I-15 trying to head westbound on I-86 will be detoured to the Northgate Interchange the following nights:

Tuesday, Dec. 19, from 7:30 p.m. to 7:30 a.m.
Wednesday, Dec. 20, from 7:30 p.m. to 7:30 a.m.

During these detours it is important that drivers follow posted speed limits. As work will continue through the winter drivers need to be particularly cautious around snowplows by giving them extra room in the work zone.

Ongoing construction at the System Interchange will improve safety and mobility while replacing bridges built in the 1960s. Work is expected to be complete in 2025. Those wishing to learn more about the project can visit the website: https://itdprojects.idaho.gov/pages/i-86i-15-system-interchange.

New I-86 bridge opens at Chubbuck

A new three-lane Interstate 86 bridge at Chubbuck is now open as construction crews head into Thanksgiving week. The new bridge over the Union Pacific Railroad adds capacity, improves traffic flow, and is designed to last 80 years.

While the bridge is complete and open, work continues nearby with the installation of a new sound wall. In addition, paneling will be installed on the bridge to protect the railroad tracks from any debris falling off the bridge.

Crews will continue to work on the I-86/I-15 System Interchange through the winter months. The next major milestone is opening the new I-15 mainline roadway slated for mid-December. Following that contractors will begin demolition of the old I-15 bridges.

This week crews will work until noon Wednesday and return to the construction site on Monday. Still, it is important that drivers be safe while travelling through the System Interchange, particularly with increased holiday traffic.

“Please pay attention to construction signs, be courteous, follow posted speed limits, and drive safe so everyone can go home safely, including workers on the project,” Engineering Manager Aaron Baird said.

New bridge to open at Chubbuck exit

POCATELLO – Tomorrow afternoon the Idaho Transportation Department will open the new bridge on westbound Interstate 86 near Exit 61 for Chubbuck. Traffic patterns are expected to change between 3 p.m. and 4 p.m.

Once the new bridge is open, westbound traffic will no longer be crossed over to the eastbound lanes. Traffic will flow normally, though westbound travelers will only have one lane.

Crews will continue working in the area for another week to open the other lanes on the bridge. Drivers are urged to follow posted speed limits and share the road.

The bridge over the Union Pacific railroad tracks was replaced to create three lanes for westbound traffic to better integrate with the redesign of the I-86 and I-15 System Interchange.

Travelers are reminded to know before they go and check 511.idaho.gov for traffic impacts.

Detour planned for Monday at Fort Hall (Exit 80)

FORT HALL – The northbound off-ramp at the Fort Hall Interchange (Exit 80) is scheduled to close Monday at noon as crews finish paving the new off-ramp. Work is expected to be completed by 5 p.m.

The closure will last approximately four hours and is dependent on favorable weather conditions. During the closure traffic will be detoured to Exit 89.

The Fort Hall Interchange is undergoing a complete reconstruction to replace the outdated bridge and improve on- and off-ramps. The redesign also allows for the planned three lanes northbound and southbound on I-15. Those wishing to learn more about the project can visit https://itdprojects.idaho.gov/pages/i-15-fort-hall-interchange.

Online open house available now for plans to repave I-15 in Blackfoot

BLACKFOOT – The Idaho Transportation Department (ITD) is hosting an online open house starting today, Nov. 1, through Nov. 14 to share design plans and gather input for a repaving project on Interstate 15 from the South Blackfoot Interchange (Exit 89) to the U.S. Highway 26/Blackfoot Interchange (Exit 93).

Community members can join the online meeting at https://itdprojects.idaho.gov/pages/i-15-blackfoot-repaving.

While ITD is also developing plans to widen I-15 to three lanes in each direction between Pocatello and Idaho Falls, the pavement has deteriorated and needs repair. Repaving this portion of I-15 in 2025 will enhance safety and extend the life of the roadway until funding is available to widen it.

Project plans are being designed based on technical data, an environmental evaluation and input from the community. This will be the only meeting that ITD will host to discuss this project. Additional meetings will be scheduled in the future for the widening project.

Those who are interested in learning more are welcome to visit the project website at https://itdprojects.idaho.gov/pages/i-15-blackfoot-repaving, email info@pocatellotoidahofalls.org or call 208-252-5553.

East 1500 North Bridge over I-15 closed until further notice

Damaged girder on East 1500 North Bridge over I-15

The East 1500 North Bridge over Interstate 15 near Shelley will be closed until further notice. A vehicle travelling northbound on I-15 today struck the bridge causing significant damage to a girder. Traffic is currently detoured via South 45th West.

“We’ll have to keep the bridge closed until we can fully inspect the damage,” Operations Engineer Greydon Wright said. “Our bridge crew will come in to do the inspection and decide what work will need to be done to repair it.”

The incident also necessitated the closure of the right lane of northbound I-15 to allow crews to clean debris from the road and ensure the safety of the travelling public.

Travelers are reminded to know before they go and check 511.idaho.gov for traffic impacts.

ITD to host open house to solicit feedback on 2026 US-91 widening

The Idaho Transportation Department (ITD) will hold an open house on Thursday, Nov. 2 from 4 to 7 p.m. to present preliminary plans for improvements along U.S. Highway 91 (Yellowstone Highway) between Park Lawn Drive and Siphon Road.

“This is an important project for the Chubbuck area,” Project Manager Kevin Sonico said. “These improvements will address the traffic growth in the area and make it safer for both drivers and pedestrians. We encourage everyone to stop by Chubbuck City Hall any time from 4 to7 p.m. on Thursday to learn more about the project. We’ll be ready to answer questions and collect comments.”

Plans include widening US-91 from three lanes to five lanes from Park Lawn Drive to Siphon Road. The project will also install a new signal and pedestrian facilities at the Siphon Road intersection. Lighting, curb, gutter, sidewalks and a shared-use path along the east side of US-91 will be constructed. In addition, the Chester Drain will be piped.

For those who cannot attend the public meeting on November 2, ITD will post meeting displays the following day on the project website itdprojects.idaho.gov/pages/park-lawn-and-siphon for review through Nov. 16. If you have questions about the project, or would like to submit feedback, you can contact the project’s public involvement manager, Andrea Gumm, at agumm@jub.com or 208-870-8751.

ITD’s snow & ice team again best in nation!

Despite more competitors than ever before, the ITD maintenance team took home first-place honors at the Snow & Ice Conference and National Snow Roadeo for the second time in three years. They won it in 2021 and placed second nationally last year.

Winning the overall team award again in Colorado September 29 against 300 competitors from all across the country is impressive,” said ITD Chief Deputy and COO Dan McElhinney. “We are proud of our ITD maintenance roadeo team members for their commitment to skill excellence, work zone safety and representing Idaho as the best in the nation!”

The ITD team (pictured at right) featured Kyler Fullmer and Stacey McCurdy of District 6 (East Idaho), Jed Henderson of District 1 (North Idaho), and Brandon Steffens of District 5 (Southeast Idaho). These were also the top four finishers in the state roadeo competition held in July in Salmon, Idaho.

McCurdy, Henderson and Steffens were also on the team that won the national title in 2021.

“I would like to thank the participants,” said first-year roadeo coordinator Alan Huey. “They were proud to represent ITD and showcase the department’s commitment to safety and the skills that translate into service for Idaho’s drivers each winter.”

“The competition was tough, but the team delivered a top-notch performance.”

Each event featured loads of competitors — Single Axle had 53 participants, Grader had 58, Tandem Axle had 59, and Skid Steer had 69. The Loader event featured 100 participants!

“It’s great that we can come together as a team from all different districts to take first place again this year as an agency,” said D1’s Henderson, who made his third straight trip to nationals this year, and was also a part of ITD’s first title team in 2021. “Everyone performed so well, and I look forward to competing again next year.”

Henderson also expressed his appreciation to Kelley Dick, who is moving on from the roadeos next year after promoting to ITD Fleet Manager.

Nighttime detours planned for I-15/I-86 System Interchange next week

Overhead signage at the System Interchange

Beginning Monday and continuing through Wednesday, nighttime closures will be in place for a section of Interstate 15 and Interstate 86 at the System Interchange to allow crews to safely remove overhead signage.

One southbound lane will be closed on I-15, and the southbound ramp to I-86 will also be closed. Drivers looking to head west on I-86 will be detoured off the interstate at Northgate, west to State Highway 91, and then south to the Chubbuck Interchange. The closures will last from 9:30 p.m. until 5:30 a.m. each night.

Ongoing construction at the System Interchange will improve safety and mobility while replacing bridges built in the 1960s. Work is expected to be complete in 2025.

Motorists should exercise caution while travelling through the construction zone. Those wishing to receive email updates about the System Interchange project can sign up at https://lp.constantcontactpages.com/su/g9MMkN9.

Drivers can also check or download the 511 app for the last traffic conditions on all state highways and freeways.