AMERICAN FALLS – The Idaho Transportation Department began repairs on two I-86 bridges in Power County this week. The Sunbeam Road and Seagull Bay bridges will both be receiving new roadway surfaces to protect the integrity of the bridges and improve safety. The first phase of the project will progress for one month while the eastbound bridges are resurfaced. The second phase will also last one month as the westbound bridges are similarly repaired. All work is scheduled to be completed by the end of October.
During construction traffic will be moved to one side of the Interstate prior to the bridges and some exiting traffic will be detoured. After the construction area is passed, traffic will cross back over to the regular side of the Interstate to proceed as usual. Motorists should watch closely for signs indicating lane changes, detours, and speed limit reductions.
During the current first phase, eastbound traffic is being crossed over to the westbound side of the Interstate prior to Sunbeam Road at American Falls. Traffic remains two-way on the westbound side of the Interstate until past Seagull Bay Exit 44. Therefore, eastbound Interstate traffic will not be able to use Exit 40 into American Falls and Exit 44 to Seagull Bay. Motorists should instead exit at the west American Falls / Rockland Exit 36 or the Rainbow Road Exit 49.
American Falls residents will still be able to enter I-86 toward Pocatello at the Exit 40 on ramp. They will progress eastbound until the Seagull Bay Exit 44 where they will detour through the exit and then re-enter the Interstate and merge with through traffic as it crosses back over from the westbound lanes.
Performing work on both bridges at the same time reduces costs and effects repairs in the same construction season. Once completed the new surfaces will be smoother and the bridge decks will be protected against further deterioration.
POCATELLO – Preliminary work on the Idaho Transportation Department’s project to rebuild the I-86/I-15 System Interchange is beginning this week. Originally built sixty years ago, the design needs to be updated to handle greater traffic volumes and to replace aging bridges that are reaching the end of their life. Joint venture contractors Sundt-Cannon is expected to begin moving equipment into the project area before the end of the week.
The scale of the endeavor is truly historic and took years to bring to fruition. When completed, approximately 900,000 cubic yards of excavation will be completed. In addition, about 225,000 tons of base material will be brought in; 111,000 tons of asphalt will be placed; and over 6,500 cubic yards of concreate will be poured. 70,000 square feet of retaining walls will also be built throughout the project area. Finally, ITD will build eight new bridges. Four of those will use precast concrete girders and four will have steel girders. In all, nearly 5,000,000 pounds of steel will be used in the bridges. Crews will work year-round for approximately three years to complete the project.
The two most significant changes motorists will see during construction are a detour for traffic travelling from I-15 northbound to I-86 westbound and the closure of the Chubbuck Road overpass.
In early August, northbound traffic from I-15 exiting west toward Chubbuck will be detoured through the Northgate Interchange and back onto I-15 South to then proceed to I-86 West. To maintain traffic for the anticipated 2-year construction of the project, the ramp will need to be lowered prior to beginning bridge construction. This necessitates the ramp closure and detour through the Northgate Interchange. This work should be completed by early September.
The Chubbuck Road overpass will be closed around August 1st, prior to the beginning of the school year, and will remain closed during the duration of the project. Construction will remove the existing bridge, excavate new embankments, and create bridges for I-15 to pass over Chubbuck Road. The final Chubbuck Road design will be easier and safer to navigate for motorists, bicyclist, and pedestrians. During construction motorists will be detoured through the Northgate interchange.
During the first phase of construction traffic from northbound I-15 intending to travel west will be detoured through the Northgate interchange.
While demolition of the Chubbuck Road overpass will not begin immediately, an important concern for the school district and other interested parties was altering bus routes and student driving routes after the beginning of the school year. This could cause unnecessary delays and confusion for buses, faculty, parents, and students.
“The school district had some real concerns about making a change during the school year and we are doing what we can to accommodate them for the safety of the students and smooth operation of the schools,” said project co-manager Zak Johnson.
The $112 million project to rebuild the system interchange is a massive undertaking that requires extensive coordination with many different parties. ITD has been in close contact with city leaders, ISP, the Bannock County Sheriff’s office, emergency response, schools, regional transit, and others to ensure the safety of Idaho citizens and motorists passing through Southeast Idaho.
An important question some in the community express is, why now?
“The aging bridges will continue to get closer and closer to the end of their design lifespan,” said project co-manager Greg Roberts, “They would still be functional, but weight limits would start to have to be imposed on truck traffic. That would negatively impact Pocatello’s economic future.”
That is an important concern for Idaho businesses. Large loads, called “mega-loads”, travel through the Gate City to Montana and west to other regions of Southern Idaho. Local manufacturing companies need to be able to move their products to their customers quickly and safely.
However, it is not just the age of the 1960’s bridges that is a concern. When the System Interchange was built there was almost no development on the east side of I-15. Today the Highland area has subdivisions, a high school, the fairgrounds, and the Wellness Complex. In addition, development at Northgate has begun and will result in even more traffic.
“We can only expect traffic volume to increase and with it congestion,” said Roberts. “That will cause the ‘weave’ between the Pocatello Creek onramp and the Chubbuck exit to get worse. Traffic entering, I-15 intending to head toward Chubbuck already has difficulty during peak times crossing all the way to the left to head west on I-86.”
The issue for drivers now is finding a gap to slip into so they can head west toward Chubbuck.
“That will only get worse if we do nothing,” added Johnson, “Gaps between cars will become smaller and smaller making it more difficult to safely merge. Drivers will be forced to make more aggressive lane changes to head to Chubbuck. That kind of situation increases collisions. We don’t want to wait until things become dangerous and people get hurt.”
Safety is a primary concern for project managers and the contractors as motorists prepare to drive through the work site. “These are our neighbors and family working out there,” said Roberts. “We do everything we can to make the worksite safe, but it’s really important that drivers follow posted speed limits, watch for lane changes and signs, and give other motorists space on the road.”
The Chubbuck Road detour will take motorists through the Northgate Interchange.
Both Roberts and Johnson have seen severe worksite accidents caused by inattentive drivers. In one instance a motorist followed a work truck directly into the work site. Unfortunately, deaths do occur and it is often the result of a motorist that do not take care in a work zone.
“It’s something that never leaves you,” said Johnson as he reflected on a fatality on a previous project. “We do everything we can to keep people safe, but when it happens it’s hard not to take it personally. We just ask everyone to please keep themselves, their families, and their neighbors safe while this project is being completed.”
Once completed, the new System Interchange will be safer and ready to carry the increased traffic volumes for the fastest growing state in America.
This project is partially funded with Transportation Expansion and Congestion Mitigation (TECM) funds as part of Governor Little’s Leading Idaho initiative. The program allows ITD to accelerate project timelines to address rapid growth and build critical infrastructure today that would otherwise take many years to fund and build.
This video describes how the new interchange will work and improve mobility and safety for the public – https://youtu.be/KRdVBAyXweA
The new design changes Chubbuck Road into an underpass with additional space for pedestrians and bicycle lanes.Vehicles travelling northbound from Pocatello Creek Road will merge with I-86 traffic on a new ramp. Both lanes will then meet with I-15 northbound traffic near Chubbuck Road.
When completed, westbound traffic from Pocatello Creek Road will pass under I-15 to merge with I-86.
Westbound traffic from Pocatello Creek Road will pass under I-15 to merge with I-86.
POCATELLO – The Idaho Transportation Department has accepted a $111.9 million winning bid by Sundt-Cannon, a joint venture, to rebuild the I-86/I-15 system interchange at Pocatello. Work is scheduled to begin mid-July and will continue for approximately three years as the interchange undergoes modernization.
The old interchange was built in the mid-1960s and the aging and obsolete bridges need to be replaced. In addition, Pocatello and Chubbuck have grown significantly to the north of I-86 and east of I-15. Through traffic has also increased resulting in more congestion in the interchange.
Currently, a particularly challenging spot for drivers travelling west toward Chubbuck from the Pocatello Creek onramp. “Drivers have just 2,400 feet to move from the right lane to the far left lane to exit to I-86. This results in difficult maneuvers,” said District Engineer Todd Hubbard.
To eliminate this problem the new design will allow through traffic travelling north toward Idaho Falls to remain in a left lane. Motorists entering the freeway northbound from Pocatello Creek can continue north to merge with northbound traffic or they can merge with westbound traffic passing under a bridge to head toward Chubbuck. “This also eliminates traffic merging from the left coming from Chubbuck. That’s important because drivers expect merging traffic to come from the right,” said Co-Project Manager, Zak Johnson.
Construction will also include a significant change for Chubbuck Road. Currently the road passes over I-15 and has limited accommodation for bicyclists and pedestrians traveling toward the Wellness Complex. The new design makes Chubbuck Road into an underpass with sidewalk and bicycle lanes.
Vehicles travelling northbound from Pocatello Creek Road will merge with I-86 traffic on a new ramp. Both lanes will then meet with I-15 northbound traffic near Chubbuck Road.
In addition, a north-south bicycle and pedestrian pathway is planned to help facilitate linking Pocatello Creek Road with the Portneuf Wellness Complex. This was designed in coordination with the Greenway Foundation. “Bicycle and pedestrian access to the Highland area was something the community saw as very important,” said Co-Project Manager, Greg Roberts.
The joint venture of Sundt Construction from Utah and Cannon Builders from Blackfoot is currently reviewing the project design and preparing a work schedule. Some equipment may be moved into position prior to the mid-July construction start date.
Motorists are encouraged to watch this I-86/I-15 Interchange overview video to understand how the new design will function. During construction it is important that drivers follow signage, slow down, and exercise caution.
This project is partially funded with Transportation Expansion and Congestion Mitigation (TECM) funds as part of Governor Little’s Leading Idaho initiative. The program allows ITD to accelerate project timelines to address rapid growth and build critical infrastructure today that would otherwise take many years to fund and build.
The new design changes Chubbuck Road into an underpass with additional space for pedestrians and bicycle lanes.
AMERICAN FALLS – The Idaho Transportation Department is beginning the summer work schedule with several projects in the I-86 corridor through Power County. These projects include repairing the Rockland Exit 36 bridge, repairing the Sunbeam and Seagull Bay bridges, and a pavement preservation project along I-86 through Power County.
The Rockland Interchange repair is scheduled to begin in June and will consist of surface repairs, girder repairs, and the installation of a new waterproof membrane for the deck. Motorists should expect some delays.
The Sunbeam and Seagull Bay bridge repairs are scheduled to begin in early August. Both will undergo surface repairs and new concrete overlays. During construction, traffic will be moved to one side of the interstate via crossovers and slowed through the construction area. Motorists should expect some detours during this project.
The pavement preservation project will consist of a micro-seal application which is intended to extend the lifespan of the pavement. ITD currently plans to perform this work after the bridge repair projects are completed. The micro-seal application is scheduled to be completed by the end of September. During work there will be lane closures and reduced speeds in work zones.
Drivers are encouraged to check 511.idaho.gov or the 511 app for the latest updates on construction and road conditions.
The westbound off-ramp at Exit 1 on Interstate 86 at the Salt Lake Interchange is expected to be closed tomorrow (Dec. 3) from 8 a.m. to 5:30 p.m.
Motorists heading west from Pocatello to Salt Lake will need to take Exit 216 at the Declo Interchange and re-enter I-84 toward Salt Lake. Eastbound traffic will not be affected by this closure.
“This is follow-up work in connection to the closure that occurred late last month. It will be a short duration closure that will allow us to smooth the asphalt on the off-ramp,” Project Manager Travis Hitchcock said. “The asphalt work and additional signage installation are the remaining items left for this project.”
Drivers are urged to pay close attention to signage and message boards that will direct them through the area.
Wadsworth Brothers Construction of Draper, Utah, is the primary contractor on this project that involves replacement of an aging interchange with a new structure that will better serve motorists in the region.
The westbound off-ramp at Exit 1 on Interstate 86 at the Salt Lake Interchange is expected to be closed from 8 a.m. to 5:30 p.m. tomorrow and Friday (Nov. 19-20).
Motorists heading west from Pocatello to Salt Lake will need to take Exit 216 at the Declo Interchange and re-enter I-84 toward Salt Lake. Eastbound traffic will not be affected by this closure.
“Work on the off-ramp must be done during the day when temperatures are high enough to properly seal the asphalt,” Project Manager Kenny Lively said. “This is one of the final steps needed for us to complete the project this winter.”
Drivers are urged to pay close attention to signage and message boards that will direct them through the area.
Wadsworth Brothers Construction of Draper, Utah, is the primary contractor on this project that involves replacement of an aging interchange with a new structure that will better serve motorists in the region.
As early as Thursday (Oct. 15), traffic will shift on Interstate 84/86 at the Salt Lake Interchange project. Motorists traveling toward Pocatello from Burley on I-84 will be detoured toward Salt Lake. They will take Exit 228 at Yale Road and then enter I-84 westbound and continue on to I-86 toward Pocatello.
“This detour will allow us to complete demolition of the aged eastbound bridge structure.” ITD Project Manager Travis Hitchcock said. “This will be the final demolition phase for this project.”
In addition to the Yale Road detour, westbound traffic progressing from I-86 to I-84 will now continue through the work zone in their designated lane of travel.
“These are new traffic patterns which replace others previously in place throughout this project,” stated Hitchcock. “It’s important that drivers pay close attention to signage and message boards that will be in place to safely direct them through the area.”
Traffic will remain reduced to a single lane in each direction. Drivers should continue to anticipate reduced speeds through the work zone and watch for crews and heavy equipment.
Wadsworth Brothers Construction, of Draper, Utah is the prime contractor on this project.
Underway since May 2018, substantial progress has been made on the Interstate 84/86 Salt Lake City Interchange in Cassia County. With this project, the Idaho Transportation Department is replacing the old interchange with a new structure that will meet current standards and provide a better driving experience for motorists.
“This is a vital travel and commerce corridor for not only this area, but for the entire state,” said ITD Project Manager Travis Hitchcock. “Our goal is to construct an interchange that will serve motorists for many years to come.”
As work proceeds, drivers should anticipate a continuation of reduced speeds and changing traffic patterns through the work zone.
“There will be varying detours over the next several months as work on specific portions of the structure occurs,” stated ITD Project Inspector Jack Kelly. “It’s important that motorists not follow their GPS but instead pay close attention to signage which is in place to safely direct motorists through the area.”
Construction is scheduled to finish by late 2020.
Wadsworth Brothers Construction, of Draper, Utah is the prime contractor on this project.
Beginning tomorrow night (Oct. 29) at 10 p.m., a new detour will be in place for motorists heading east on Interstate 84/86 from Burley toward Pocatello. During this time, crews will install new structures to hold overhead signage.
Weather permitting, this temporary traffic pattern is expected to last until 6 a.m. on Wednesday, October 30.
“Unlike previous detours that have been occurring in this area, this portion of construction requires that we direct motorists completely off of the interstate,” said ITD Project Manager Travis Hitchcock. “Directing traffic to Idaho Highway 77 and Idaho Highway 81 will allow for safe installation of the structures without traffic traveling underneath.”
This is part of the Salt Lake Interchange replacement project, underway since May of last year. Construction is scheduled to finish by late 2020.
Drivers should still anticipate reduced speeds through the work zone and pay close attention to signage in place to safely direct motorists through the area.
Wadsworth Brothers Construction, of Draper, Utah is the prime contractor on this project.
Traffic will be detoured overnight next week for motorists heading eastbound on Interstate 84 from Burley toward Pocatello as crews work to place girders on the newly constructed bridge.
This is part of the Salt Lake Interchange replacement project, underway since May of last year. Construction is scheduled to finish by late 2020.
This temporary traffic pattern is expected to be in effect between the hours of 9 p.m. and 5 a.m. during the nights girders are placed. Work is anticipated to be completed within a week.
“Detouring traffic around this portion of the work zone ensures the safety of motorists who would otherwise be traveling underneath the bridge,” said ITD Project Manager Travis Hitchcock. “Crews will be working to place the girders at night in order to reduce traffic impacts during peak traveling hours.”
Drivers should still anticipate reduced speeds through the work zone and pay close attention to signage which will be in place to safely direct motorists through the area.
Wadsworth Brothers Construction, of Draper, Utah is the prime contractor on this project.
