Category: South-Central

On Monday the Idaho Transportation Department will begin a scrub coat on State Highway 75 through Bellevue. Work is expected to take through Wednesday, Oct. 9, and will cause one lane in each direction to close each day from 7 a.m. to 5 p.m.

A scrub coat is a thin overlay of asphalt to help fill cracks and reduce maintenance costs on the roadway.  While there will not be a speed reduction, drivers should anticipate some delays during commute times and be extra cautious in the area. For traffic updates go to Idaho 511.

Early utility work on State Highway 75 in Ketchum will begin Monday, Oct. 7. Intermountain Gas and the City of Ketchum will be relocating utilities along SH-75 ahead of the Idaho Transportation Department’s project to improve SH-75 between Elkhorn Road and River Street. Roadway construction for the project is anticipated to begin early next year.
SH-75 will be closed in both directions from Serenade Lane to River Street. Traffic will be detoured through Serenade Lane and 2nd Avenue, similar to what has been in place for the downtown Ketchum construction. The utility work is anticipated to take four weeks to complete.
ITD has worked with many utility partners throughout the design process to prepare for construction on SH-75. Other utility work later this year will include the burying of power lines by Idaho Power. In addition, tree removal work is expected to begin soon in preparation for the roadway work.
“ITD appreciates the collaboration between agencies on this project,” ITD Project Manager Brock Dillé said. “More information about construction plans for this project will be available at our open house at the end of this month.”
ITD will be sharing final design plans for the project along with anticipated construction information at a final project open house. Community members can participate in-person at the Limelight Hotel on Oct. 29 from 4-7 p.m. or join online Oct. 29 – Nov. 12. Click here for details.
For more information about the SH-75, Elkhorn Road to River Street project, please visit: itdprojects.idaho.gov/pages/idaho75.

The Idaho Transportation Department (ITD) will install a new traffic signal at the intersection of U.S. Highway 93 and State Highway 25 in Jerome. Construction is anticipated to begin this fall, in conjunction with work at US-93 and 300 South.

ITD has been conducting engineering analysis on this intersection for several years to determine the need for a traffic signal to ensure safe traffic mobility. Based on traffic volumes, ITD is preparing to install a signal. Electrical conduit and components were installed at this intersection during a past project to aid in future construction.

Historically, signal components have been on backorder so a completion date for the installation has not been identified but ITD anticipates beginning construction this fall with a final completion in the spring.

Update Sept. 12, 2024 – State Highway 21 remains closed as the Wapiti Fire continues to burn between Lowman and Stanley. Despite ongoing fire activity, the Idaho Transportation Department has completed a damage assessment of the area.

Emergency contracts have been established, and repair efforts are actively underway. Crews are currently removing hazard trees along the highway, and assessments indicate that approximately 49 road signs and several miles of guardrail will need to be replaced in Boise County. The guardrail is crucial, given the steep slopes along this mountainous highway.

“We are taking a proactive approach to this situation, and as long as it is safe to do so, we will continue our work in the area. Completing the damage assessment was a critical first step, allowing us to secure the necessary resources and determine what needs to be done to safely reopen the highway when the time comes,” Field Operations Manager Eric Copeland said.

Throughout the duration of this fire, ITD crews will continue to conduct twice-daily patrols using loaders to clear burnt trees, rocks, and debris from the highway, ensuring that fire crews and emergency responders can safely access the affected areas.

To date, the Wapiti Fire has burned more than 120,000 acres and is currently 12% contained. As multiple fires continue to impact Southwest Idaho, ITD encourages travelers to check road conditions at 511.idaho.gov before planning their journeys.

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Update Sept. 6, 2024 – Both directions of State Highway 21 remain closed from Sourdough Lodge to Stanley (MP 84 to 130). At the time of this update, the fire has burned more than 100,000 acres and is 12% contained. Traffic to/from the Stanley area can use State Highway 75 as an alternate route. There is no estimate on when SH-21 will reopen.

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Update Aug. 27, 2024 – Lower Stanley is being evacuated due to the movement of the Wapiti Fire. State Highway 75 will be closed at Museum (MP 190), Gateway (MP 192) and Casino Creek (195). Both directions of SH-75 are closed due to the fire risk. State Highway 21 from Stanley to Sour Dough Lodge is still closed in both directions.

We will continue to monitor fire movement and issue road closures as needed. Drivers in the area should keep an eye out for signage about the fire and avoid areas that are blocked off. The road closures include pedestrian, bicycling and other modes of transportation.

Go to 511.idaho.gov for up to date information on road closures and more. You can also follow Wapiti Fire Info 2024 for more fire information.

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Update Aug. 23, 2024 – The State Highway 21 closure has been expanded from Sourdough Lodge to Stanley (MP 84 to 130) due to wildfire activity from the Wapiti Fire. Only local traffic is permitted between the Sourdough and Warm Springs Airstrip. There is no public access from the highway to surrounding areas including Grandjean, Bull Trout, Cape Horn, Boundary Creek, or Seafoam.

Traffic to/from the Stanley area can use State Highway 75 as an alternate route. Access to local businesses in Lowman and Stanley remains open at this time. Please check with the Boise and Sawtooth National Forests for area closure information. Please check with the Boise and Custer County Sheriffs’ Offices for local road closures and evacuation orders.

There is no estimate on when SH-21 will reopen. Fire information can be found on the National Interagency Fire Center’s website.

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Update Aug. 22, 2024 – State Highway 21 remains closed from Warm Springs Creek to Stanley (MP 92 to 130) due to wildfire activity from the Wapiti Fire. There is currently no public access to the Grandjean area, as the fire’s currently burning on both sides of the highway. Motorists planning to travel between Boise and Stanley must take an alternate route through Ketchum on State Highway 75. There is no estimate for when the road will reopen as fire activity remains unpredictable at this time.

If you are traveling on SH-21, please stay alert for increased fire traffic. It’s crucial not to slow crews down as they work to manage the fire. Avoid traveling to closure points to wait. For your safety, check 511.idaho.gov before you go!

Fire information can be found on the National Interagency Fire Center’s website.

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Aug. 20, 2024 – The Wapiti Fire burning in the Boise National Forest has forced the closure of State Highway 21 near Grandjean. Motorists planning to travel between Boise and Stanley will need to take an alternate route through Ketchum on State Highway 75. There is no estimate for when the road will reopen.

The Wapiti Fire is 10% contained and has burned more than 9,000 acres. The Idaho Transportation Department encourages all drivers to check 511.idaho.gov for current conditions on your route.

Here are some additional safety tips for traveling in areas with wildfires:

• Power outages are common near wildfires. Treat non-working traffic signals as four-way stops.
• Bring additional food and water in case your trip is delayed.
• Driving in smoke is similar to driving in heavy fog. Slow down, maintain a steady pace, and stay alert.
• Turn on headlights when driving in smoky areas.
• The safest place to wait for a highway to reopen is at home.  Avoid traveling to closure points to wait, as closures could last for days.

Fire information can be found on the National Interagency Fire Center’s website.

Lower Stanley is being evacuated due to the movement of the Wapiti Fire. State Highway 75 will be closed at Museum (MP 190), Gateway (MP 192) and Casino Creek (195). Both directions of SH-75 are closed due to the fire risk. State Highway 21 from Stanley to Sour Dough Lodge is still closed in both directions.

We will continue to monitor fire movement and issue road closures as needed. Drivers in the area should keep an eye out for signage about the fire and avoid areas that are blocked off. The road closures include pedestrian, bicycling and other modes of transportation.

Go to 511.idaho.gov for up to date information on road closures and more. You can also follow Wapiti Fire Info 2024 for more fire information.

State Highway 21 is now indefinitely closed in both directions from Warm Springs Creek to Stanley due to the Wapiti Fire.  

SH-21 between Boise and Lowman closed Tuesday, but due to fire growth the closure has been extended to Warm Springs. The highway is closed between milepost 92 and milepost 130. 

There is no public access to Grandjean at this time, and traffic to and from Stanley will need to use State Highway 75 as an alternate route. There is no estimated reopening time, but travelers should continue to check Idaho 511 for updates. 

Here are some additional safety tips for traveling in areas with wildfires: 

• Power outages are common near wildfires. Treat non-working traffic signals as four-way stops. 
• Bring additional food and water in case your trip is delayed. 
• Driving in smoke is similar to driving in heavy fog. Slow down, maintain a steady pace, and stay alert. 
• Turn on headlights when driving in smoky areas. 
• The safest place to wait for a highway to reopen is at home.  Avoid traveling to closure points to wait, as closures could last for days. 

Fire information can be found on the National Interagency Fire Center’s website.

Update Aug. 23, 2024 – The State Highway 21 closure has been expanded from Sourdough Lodge to Stanley (MP 84 to 130) due to wildfire activity from the Wapiti Fire. Only local traffic is permitted between the Sourdough and Warm Springs Airstrip. There is no public access from the highway to surrounding areas including Grandjean, Bull Trout, Cape Horn, Boundary Creek, or Seafoam.

Traffic to/from the Stanley area can use State Highway 75 as an alternate route. Access to local businesses in Lowman and Stanley remains open at this time. Please check with the Boise and Sawtooth National Forests for area closure information. Please check with the Boise and Custer County Sheriffs’ Offices for local road closures and evacuation orders.

There is no estimate on when SH-21 will reopen. Fire information can be found on the National Interagency Fire Center’s website.

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Update Aug. 22, 2024 – State Highway 21 remains closed from Warm Springs Creek to Stanley (MP 92 to 130) due to wildfire activity from the Wapiti Fire. There is currently no public access to the Grandjean area, as the fire’s currently burning on both sides of the highway. Motorists planning to travel between Boise and Stanley must take an alternate route through Ketchum on State Highway 75. There is no estimate for when the road will reopen as fire activity remains unpredictable at this time.

If you are traveling on SH-21, please stay alert for increased fire traffic. It’s crucial not to slow crews down as they work to manage the fire. Avoid traveling to closure points to wait. For your safety, check 511.idaho.gov before you go!

Fire information can be found on the National Interagency Fire Center’s website.

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Aug. 20, 2024 – The Wapiti Fire burning in the Boise National Forest has forced the closure of State Highway 21 near Grandjean. Motorists planning to travel between Boise and Stanley will need to take an alternate route through Ketchum on State Highway 75. There is no estimate for when the road will reopen.

The Wapiti Fire is 10% contained and has burned more than 9,000 acres. The Idaho Transportation Department encourages all drivers to check 511.idaho.gov for current conditions on your route.

Here are some additional safety tips for traveling in areas with wildfires:

• Power outages are common near wildfires. Treat non-working traffic signals as four-way stops.
• Bring additional food and water in case your trip is delayed.
• Driving in smoke is similar to driving in heavy fog. Slow down, maintain a steady pace, and stay alert.
• Turn on headlights when driving in smoky areas.
• The safest place to wait for a highway to reopen is at home.  Avoid traveling to closure points to wait, as closures could last for days.

Fire information can be found on the National Interagency Fire Center’s website.

The Idaho Transportation Department will have daytime ramp closures at Exit 141, both on and off ramps, for up to two weeks during work to rehabilitate the pavement on US-30. Closure of the ramps will ensure the work is completed more efficiently and for the safety of the work crews.

During the daytime ramp closures at Exit 141, all drivers will be detoured to Exit 137 about four miles west of Bliss. Ramps at Exit 141 will be opened as work concludes each day; impacts are expected to be complete by July 29.

The ramp closures are part of a project to extend the life of US-30 through Bliss by recycling the existing asphalt, adding cement to better stabilize the roadway base, and repaving the roadway. Construction on US-30 through Bliss is expected to be completed in early fall.

For more information on this project go to Idaho 511