Gusty winds later today expected to cause drifting, possible closures on US-95

Snow blows south of Cottonwood on US-95

Drivers should be prepared for drifting and blowing snow on US-95 as the National Weather Service predicts a hazardous combination of snow and wind for the weekend.

“Snow is predicted for all of North Central Idaho, but on the Camas Prairie especially winds could cause drifting from Cottonwood to White Bird Hill,” Foreman Dave Fraser said. “We are keeping a close eye on conditions but would like to warn drivers of low visibility and possible road closures.”

Gusts could exceed 30 mph. If visibility becomes poor, highways could close until conditions improve. Drivers should visit 511.idaho.gov or download the 511 app to keep track of road conditions or closures.

Road closures are also reported on ITD’s Twitter.

Chains are not recommended for White Bird Hill at this time.

Repairs to US-95 slide south of Riggins complete

Photo of the completed slope from across the river

november 24

Long-term repairs to the US-95 slide south of Riggins are complete. The failing slope above milepost 188 has disrupted traffic on the state’s primary north-south route since it first fell July 3 and then again on July 10.

“With the changes we’ve made, we have greatly reduced the likelihood of another slide blocking US-95 again in the area,” Materials Engineer Janet Zarate said.

The unstable rock mass above the highway has been reduced through multiple rounds of blasting and scaling, and the remaining slope has been reinforced with cable netting bolted into the rock.

Watch a video of the various stages of repairs.

Last week crews reconstructed US-95 and repaved Old Pollock Road. The temporary signals that have been used to direct traffic since August 5 were also removed.

“Drivers may notice that the highway had to be shifted to provide room for a larger ditch,” Zarate said.

Within the coming weeks, crews will finish installing guardrail and add fencing on top of it to keep any future loose rock confined to the ditch.

“It’s been a hard push to get to this point, with more than twenty-five other companies involved,” Zarate said. “We appreciate the support given to us by residents and local officials over these last few months.”

november 13

A helicopter helps install cable netting on the US-95 slide south of Riggins
A helicopter helps install cable netting on the US-95 slide south of Riggins
Crews were able to secure cable netting over the slope this last week with the help of a helicopter. Netting will help direct any rock that comes lose down the slope away from the highway and into the ditch.
At least two days of warmer weather are needed to finish paving US-95 and Old Pollock Road. Given variable weather conditions expected over the next week, crews will work when they can. Pay attention to road signs in the area for the latest schedule. During paving, drivers can expect up to 15-minute delays.
Repairs are on track to be completed by Thanksgiving.

november 3

Photo of gravel and cones on Old Pollock Road
Old Pollock Road before final repairs as part of the US-95 MP 188 mitigation project.

A three-day closure is expected this week on Old Pollock Road as crews enter the final phases of long-term repairs to US-95 south of Riggins after a landslide first closed the highway July 3.

Old Pollock Road served as a detour during the initial response to the slide.

“The county road had been closed since 2016 due to its own landslide, so in order to turn it into a viable detour, we had to widen it and improve the driving surface by adding gravel,” Materials Engineer Janet Zarate said. “Now that repairs to the US-95 slide are nearly over and we no longer need an alternate route, we need to take some of the weight off the slide area on Old Pollock Road by removing most of what we added, as well as address distressed pavement.”

The closure is planned Wednesday morning through Friday night. Drivers should pay attention to digital signs in the area for the exact times, as the schedule could vary.

“Once we’re done, there will be sections of new pavement, but drivers should expect a gravel surface and dip in the road across the old landslide area,” Zarate said.

Work also continues on the US-95 slide, with cable netting expected to be laid over the face of the slope the second week of November. A helicopter will be used to hold the netting above the slope as crews attach it to bolts that have already been embedded in the slope.

Helicopter activity is expected for at least two days, during which drivers should plan for 20-minute delays.

Once the netting is secured, crews will finish installing fencing at the base of the slide and repave the highway. Repairs are expected to be complete by Thanksgiving.

october 27

Drilling on the face of the slope is now complete. Next crews will start installing mesh at the top of the slope and removing the rock berm on the south side. Impacts to traffic – delays up to 15 minutes – are expected to remain the same until early November.
Remaining work includes installing cable netting on the face of the slope, installing fencing at the bottom of the slope, repairing the surface of US-95 and making minor changes to Old Pollock Road. Work is expected to wrap up in mid-November.

september 23

View footage from the final major blast in long-term repairs.

september 22

Both US-95 and Old Pollock Road are expected to close today at 11 a.m. PT / 12 p.m. MT to allow crews to blast 1,000 cubic yards of unstable rock from the slope adjacent to the active slide at milepost 188 south of Riggins.

The complete closure is expected to last about 30 minutes. After the blast, traffic will be allowed to travel through the area on the US-95 temporary road around the base of the slide or Old Pollock Road.

“Although this particular slope is not currently sliding, it has the potential to,” Materials Engineer Janet Zarate said. “We plan to proactively address it now while we have the right equipment and people in the area.”

This is the second major and final blast to remove material from the slope and will be much smaller than the first.

After blasting is complete, drivers can anticipate continued 20-minute delays for several weeks while geotechnical experts finish dislodging loose material.

“During those short-duration closures, the temporary signals will turn red,” Zarate said. “It’s important to stop so you’re not driving below boulders as they are being pushed off the rock face.”

Next steps for slope stabilization include reinforcing the remaining slope with bolts and wire fencing. Repairs are expected to take until mid-November to complete.

september 10

Photo of the slope above MP 188 on US-95 after blast
Photo of the slope above MP 188 on US-95 after blast

A small blast is planned for 15 minutes between 3 – 4 p.m. PT / 4 p.m. – 5 p.m. MT to remove additional leftover rock from the first blast. Both Old Pollock Road and the detour around the base of the slide will be closed.

Drivers should expect continued follow-up blasts as geotechnical experts scale and reassess the slope.

september 8

Photo of scalers on the US-95 slope south of Riggins
Photo of scalers on the US-95 slope south of Riggins

A blast at 3 p.m. PT / 4 p.m. MT today at the slide near Riggins will close Old Pollock Road and the detour around the base for 15 minutes. Check 511 for updates. These rocks made it past the first blast and days of scaling (see video), but we’ll get it taken care of today.

SEPTEMBER 2

Photo of the slope at MP 188 on US-95 after the Aug. 28 blast
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Traffic at the US-95 slide south of Riggins is planned to shift from the detour on Old Pollock Road to the temporary road around the base of the slide tonight, thanks to quick progress on cleanup efforts since the blast last week. The route could reopen as early as 5 p.m. PT / 6 p.m. MT, but drivers should check 511.idaho.gov for updates as the deadline approaches.

“We’re able to open this up much sooner than anticipated,” said Janet Zarate, co-manager of the repairs and materials engineer for the Idaho Transportation Department. “Both our contractors and our own employees have worked long hours over the last several days, putting us ahead of schedule.”

In addition to clearing the roadway, crews finished rebuilding protective berms to shield traffic from any additional rock fall.

Traffic conditions will be similar as before the blast, but drivers should plan for additional 30-minute delays as scalers on the slope dislodge loose material. Scaling will continue throughout the week but minimal traffic impacts are anticipated over the holiday weekend.

“In just a few short months, we will have built something that will protect drivers below for decades,” Zarate said. “The inconvenience of delays in the coming days will help keep travelers safe and prevent long-term delays in the future.”

Last Friday, both US-95 and Old Pollock Road were closed for half an hour while crews detonated 6,000 pounds of explosives, removing 14,000 cubic yards of unstable material from the slope.

A second blast in the coming weeks will address stability concerns for the adjacent slope to the south.

For progress updates, drivers should visit itd.idaho.gov/us95rigginsslide and follow ITD on Facebook and Twitter.

August 28 evening update

Still of the blast on US-95 MP 188 south of Riggins
Still of the blast on US-95 MP 188 south of Riggins
Blasting to remove unstable material from the US-95 slide south of Riggins earlier this evening was successful. An estimated 14,000 cubic yards of unstable rock from the slope at milepost 188 were removed, which is the same amount of rock that has already fallen to the road since the first slide on July 3.
Traffic can now run on Old Pollock Road. Cleanup efforts on the detour around the base of the slide are expected to take up to one week, after which traffic will be shifted back on to US-95.

august 28 afternoon update

The one-hour closure is now expected to start at 4:30 p.m. PT / 5:30 p.m. MT at the earliest. For the most up-to-date information, check 511 as conditions may change.

AUGUST 28 morning update

Both US-95 and Old Pollock Road are expected to close tonight from 3 to 4 p.m. PT / 4 to 5 p.m. MT to allow crews to blast an estimated 14,000 cubic yards of unstable rock from the slope at milepost 188. Just as much rock has already fallen to the road since the first slide on July 3.

After the blast, traffic will remain on Old Pollock Road until the slope is determined to be stable and crews can clear the detour around the base of the slide. Cleanup efforts are expected to take up to one week.

This is the first of two blasts planned to correct the slope failure. The second blast has not yet been scheduled.

After blasting, long-term repairs will include reinforcing the remaining slope with bolts and wire fencing.

August 25 update

Photo of drilling equipment preparing the slope above milepost 188 on US-95 for blasting

Both US-95 and Old Pollock Road are expected to close Friday evening (Aug. 28) to allow crews to blast an estimated 14,000 cubic yards of unstable rock from the slope, the same amount that has fallen to the road since the first slide at milepost 188 on July 3.

Traffic will be shifted onto Old Pollock Road Thursday night in anticipation of the blast. The complete closure on Friday is expected to last just one hour, and after the blast, traffic will be allowed to travel through the area on Old Pollock Road.

“Our priority is to ensure that the residual rock is stable after the blast and to clear the temporary road around the base of the slide,” Operations Engineer Jared Hopkins said. “That could take up to a week, during which we will need to keep traffic on Old Pollock Road.”

This blast is the first of two planned to remove material from the slope. An update will be sent later this week with the timing of the blast on Friday evening. The second blast has not yet been scheduled.

Long-term repairs also include reinforcing the remaining slope with bolts and wire fencing. They are expected to take until late October to complete.

Drivers should download the 511 app to check for the latest conditions. For progress updates, drivers should visit itd.idaho.gov/us95rigginsslide and follow ITD on Facebook and Twitter.

August 20 update

A semi passes the temporary signal at the US-95 slide south of Riggins
A semi passes the temporary signal at the US-95 slide south of Riggins

Drilling will begin today at the US-95 slide south of Riggins. This is part of the long-term repairs, which will involve controlled blasting and reinforcing the rock face, that are planned for completion in late October. The unstable slope has affected traffic on the highway since it first slid on July 3 and then again on July 10.

Drilling is the first step in the process of safely removing material from the slope. At the same time, crews will rebuild the rock berm to catch debris during blasting and shield traffic from unexpected rock fall.

“Once those two steps are completed, then we can proceed to blasting,” Operations Engineer Jared Hopkins said. “Drivers won’t be affected until we blast, which is not scheduled until early September.”

An estimated 14,000 cubic yards will be removed by dynamite in one blast, during which there will be no access through the area on the detour around the base of the slide or on Old Pollock Road. More information will be released when a final date is set.  

After blasting, crews will clear the detour around the base of the slide. Geotechnical experts will finish dislodging any loose material before using steel bolts to secure the remaining rock in place. Wire fencing will be positioned to cover the surfaces between bolts, and drains will also be installed.

“Reinforcing the slope with bolts and fencing will be the most time-consuming task but will not impact traffic,” Hopkins said.

Once work on the rock face is complete, contractors will dismantle the berm, repair US-95 and remove the detour around the base of the slide.

“Over the next two months, drivers should expect intermittent closures on US-95 or Old Pollock Road,” Hopkins said. “We will alternate between the two routes to accommodate traffic, with a complete closure of both only planned for the day we blast.”

Repairs are expected to cost $3 million and will be completed by Scarsella Brothers, Inc. out of Seattle.

August 4 update

Traffic runs on a temporary road around the debris field on US-95
Traffic runs on a temporary road around the debris field on US-95

Starting tonight, the Idaho Transportation Department will open US-95 at the slide area south of Riggins for nighttime travel. Moving forward, the temporary road around the base of the highway will be open 24/7 unless closures are required for safety concerns or future repairs.

“We have worked with our geotechnical experts to establish a monitoring and lighting system that allows us to continually observe and survey the slope,” Operations Engineer Jared Hopkins said. “Now that we can do it safely outside of daylight hours, opening up for nighttime travel will better serve our customers who need to make deliveries at night.”

Flaggers will be on site tonight to direct two lanes of traffic through the work area. After tonight, temporary signals will replace the flaggers. The signals will be controlled by a spotter who will observe the slope and coordinate with surveyors on site.

To preserve the route for future use as a detour, Old Pollock Road will continue to be posted for local traffic only.

“This slide has proven to be a complicated issue, and we would like to thank everyone for their patience as we work to resolve it in a safe manner,” Hopkins said.

The temporary road around the base of the slide has been open for daytime travel since July 27.

Plans for long-term repairs are still being designed. They are not expected to be completed this week. Another update will be sent once a contractor has been hired.

july 30 update

ITD toured the site with prospective contractors earlier this week to answer questions prior to putting the design plans for long-term mitigation out to bid.

Based on feedback from the contracting community, additional details are being added to the plans. The contract will likely not be awarded until next week or after.

july 27 update

The temporary gravel road around the base of the slide opened to two lanes today. Flaggers are on site to help traffic in the event that movement is detected on the slope.

At night, flaggers will shift from their current positions closer to the slide to maintain the closure on Old Pollock Road so it may remain viable for future use as a detour.

july 26 update

Tomorrow morning (July 27), the Idaho Transportation Department will open US-95 at milepost 188. Drivers will be able to navigate through the area on a temporary gravel road that was built at the base of the slide.

This temporary roadway was previously used for a short period of time before additional movement of the slope was discovered, which ultimately resulted in further rockfall on the highway.

“Our focus has always been centered on reopening the highway as soon as possible,” Operations Engineer Jared Hopkins said. “The nature of this situation however, requires us to remain diligent and only make decisions when we can ensure the safety of both motorists and our workers.”

Last week, crews worked to blast and remove massive boulders that had fallen on the temporary roadway. Additional maintenance operations occurred over the weekend in order for traffic to begin utilizing the road Monday morning.

The temporary road will be open to one lane traffic during daytime hours only (5 a.m. to 8 p.m. PDT / 6 a.m. to 9 p.m. MDT). Drivers must adhere to flaggers and pilot cars that will be present to direct them through the area.

“We have been monitoring the slope since the initial slide occurred on July 3, and we will continue monitoring the slope while traffic is moving around the base of the slide,” stated Hopkins. “Safe monitoring can only occur during daylight so the hours of travel will be reduced to coincide with such.”

Over the coming weeks, ITD will continue to remove rocks from US-95 and mitigate the stability of the slope.

“We appreciate how cooperative and patient the public has been throughout this process,” Hopkins said. “Our crews have been, and will continue, to work as quickly as possible to safely restore the highway and driving conditions back to normal.”

july 24 update

Workers walk through the shoofly on US-95 at milepost 188 after the biggest boulders were blasted
Workers walk through the shoofly on US-95 at milepost 188 after the biggest boulders were blasted

Over the last week crews were able to drill and blast some of the biggest boulders that have kept the temporary road around the base of the slide on US-95 south of Riggins closed since July 10. With these boulders now much smaller, the route may reopen as early as Monday, July 27.

“Now that the boulders are of manageable size, we will focus on clearing the detour around the base of the slide while continuing to monitor the stability of the slope,” Operations Engineer Jared Hopkins said. “We are still determining what the highway will look like when it reopens, but drivers should be prepared for flaggers and reduced lanes and hours.”

The final repairs to mitigate the slope failure are scheduled to be awarded on July 30. Once awarded, the contractor will be asked to mobilize within 48 hours.

Old Pollock Road will continue to be monitored and maintained for possible use as a detour in the future.

july 17 update

Photo from the top of the failing slope on US-95 at milepost 188 looking at massive boulders
Photo from the top of the failing slope on US-95 at milepost 188 looking at massive boulders

On Monday crews are expected to start removing rocks at the base of the slide on US-95 south of Riggins. The temporary road built around the base has been blocked by massive boulders since the slope failed for a second time last week but may be open in time for next weekend.

“Our entire timeline is dependent on survey results,” Operations Engineer Jared Hopkins said. “If we observe movement, that will limit our ability to have crews working underneath the slope and delay the eventual reopening of the temporary road.”

No significant movement has been detected since late last week, allowing scalers to finish dislodging loose material on the rock face this week.

Removing debris and rebuilding the rock berm to shield the temporary road is planned to take at least all week.

“Some of these boulders are 40 feet wide,” Hopkins said. “We’ll need to drill and blast them into small enough pieces to be removed.”

In the meantime, drivers will continue to be detoured to Old Pollock Road, which is open from 5 a.m. to 8 p.m. PDT / 6 a.m. to 9 p.m. MDT.

To ensure the long-term stability of the slope, ITD has hired WHPacific to design a mitigation plan that will include controlled blasting. Those plans are scheduled to be advertised in a few weeks to allow for construction in late summer. At this time the duration and costs of removal of the rock face are unknown.

july 14 afternoon update

The US-95 slide detour route on Old Pollock Road will open an hour earlier starting tomorrow morning (July 15). Traffic will be allowed on the route from 5 am – 8 pm PDT (6 am – 9 pm MDT). This change in time is to better accommodate local traffic.

All motorists utilizing the route must still adhere to flaggers and pilot cars that are there to safely and efficiently direct traffic through the area.

July 14 morning UPDATE

The Idaho Transportation Department will continue to monitor the US-95 slide south of Riggins (milepost 188) to determine if the area is sufficiently stable for crews to begin working on rock removal.

“The additional rock fall that occurred last Thursday invalidated the survey points we were monitoring,” ITD Operations Engineer Jared Hopkins said. “We have to once again establish a baseline and carefully monitor the slope over a number of days to ensure that no significant movement is continuing to occur that would cause concern.”

A scaling crew was onsite yesterday to evaluate damage resulting from the recent rock fall and assess how the area can be best secured so that crews can begin removing fallen rock off the highway. Scalers also worked to knock off loose rocks and boulders on the slope.

Scaling activities, along with continued monitoring, are expected to carry on throughout the remainder of this week.

“We need to give the slope time to stabilize,” Hopkins explained. “When we are able to safely bring more crews into the area, we will begin rock removal, starting first on the temporary road built at the base of the slide.”

Some of the fallen rock is up to 40 feet in diameter. Various methods will be required to break the massive boulders into pieces and remove them with heavy equipment.

“Blasting in some form will likely occur,” stated Hopkins. “This will be done in a controlled manner and we will continue to carefully monitor the above slope while any work on the ground is underway.”

US-95 will remain closed until it is determined that the slope is stable and crews are safely able to enter the area and remove fallen rock.

Old Pollock Road will continue to serve as a detour around the slide during daytime hours – 6 am – 8 pm PDT (7 am – 9 pm MDT). The detour will remain closed at night as crews perform maintenance operations on the roadway, which typically does not see this amount of traffic.

Hopkins said the goal is to reopen the temporary roadway on US-95 as soon as it’s feasible to do so.

“We have to continue to put the safety of our workers and the traveling public first in every decision we make. Our team is working hourly and diligently on this ever changing situation and we appreciate the patience and cooperation of area residence and motorists as we work to restore the highway.”

July 10 UPDATE

Massive boulders came down last night at the U.S. Highway 95 slide south of Riggins (milepost 188). The slope above the route remains too unstable to allow for traffic or rock removal crews in the area.

“The highway will remain closed until we are able to evaluate this new development and determine the best option to safely stabilize the slope.” Operations Engineer Jared Hopkins said.

The department had already built a temporary gravel road to detour traffic around the base of the slide, but continued significant movement on the slope closed it on July 8.

“The extensive rock fall that occurred last night confirmed that we had made the right decision to completely close that portion of US-95 to traffic,” Hopkins said.

Early next week, crews will again begin scaling the slope and surveying the area.

“Currently there are a lot of overhanging boulders and ledges,” stated Hopkins. “We don’t yet know how stable these are and until we are able to further evaluate the area, crews will not be able to engage in rock removal operations.”

Old Pollock Road will continue to serve as a detour around the slide during daytime hours – 6 am – 8 pm PDT (7 am – 9 pm MDT). The detour will remain closed at night in order for crews to perform maintenance operations on the roadway, which typically does not see this amount of traffic.

“It’s very important that we maintain the integrity of Old Pollock Road so that it can continue to serve as a viable option for detouring traffic during this time,” Hopkins said.

The slope and area around the slide is considered extremely hazardous. ITD is asking citizens to stay away from the area for their safety. The department is also asking drivers choosing to use the detour, to ensure that they drive attentively in order to keep traffic flowing.

“The proven unpredictability of this slide requires that we remain flexible,” Hopkins said. “While our goal is to safely reopen the highway as soon as possible, we are very thankful that no one has been injured and will focus our efforts to ensure that it remains that way.”

Updates will be provided on the status of the slide as they are made available. At present, there is no estimated time for reopening of the highway.

July 8 evening update

The recently reopened detour around the US-95 closure south of Riggins due to a July 3 rockslide will not open tomorrow following discovery of significant movement on the slope. This closure is anticipated to last at least two days.

“Between Monday and today, one of our survey targets moved nearly two inches,” Operations Engineer Jared Hopkins said. “That kind of activity may not sound like much, but in terms of geological movement it is alarming.”

The continued closure at US-95 will allow geotechnical experts to perform intensive scaling activities to dislodge the rock and reassess site conditions.

During the closure, Old Pollock Road will serve as a detour for both passenger and commercial traffic.

“This is a one-lane gravel road that is nearly four miles long,” Hopkins said. “Even with this open, getting through the area could take up to three hours.”

Repairs to Old Pollock Road were completed earlier tonight. Flaggers will be on scene tomorrow morning at 6 a.m. PDT / 7 a.m. MDT to direct alternating traffic.

“Slides are unpredictable, and this one keeps proving that,” Hopkins said. “For the safety of drivers and our workers, we have to close it. Until this problem is solved, we recommend that drivers check 511 every time they travel on US-95.”

July 8 morning update

Operators weigh down protective containers near the temporary road around the US-95 MP 188 slide
Operators weigh down protective containers near the temporary road around the US-95 MP 188 slide

U.S. Highway 95 will open to one lane of traffic between Pollock and Riggins this morning by 10 a.m. PDT/ 11 a.m. MDT and stay open until 8 p.m. PDT/ 9 p.m. MDT for the first time since the July 3 rockslide closed it at milepost 188.

Drivers will pass around the slide on a temporary gravel road. They should expect lengthy delays as only a limited number of vehicles will be allowed to pass underneath the slope at one time. Scaling activity above will also require periodic 20-minute closures over the next couple of days.

“We have built a rock berm and placed large container boxes to shield traffic from any unforeseen rockfall,” Operations Engineer Jared Hopkins said. “A spotter and a surveyor will watch the hillside and be ready to have flaggers close the highway in the unlikely event it becomes unstable.” 

Starting Thursday, ITD plans to open the highway from 6 a.m. PDT /7 a.m. MDT to 8 p.m. PDT/ 9 p.m. MDT each day. Approximately 30 minutes before the highway is closed each night, staff at barricades in Riggins and New Meadows will turn traffic away.

Crews will continue breaking down rocks and pushing them up against the existing berm to make it taller and provide more room for any further debris.

Download a photo of operators filling the container boxes with rocks last week.

Improvements to Old Pollock Road will be completed later today, serving as another one-lane gravel option for local commuters only but not commercial traffic.

“For the time being, motorists should plan for congestion and expect the highway to be closed at night when we can’t monitor the slope,” Hopkins said. “We expect to keep flagging and monitoring for several weeks until we identify a long-term solution.”

Another update will be released when the long-term solution is identified next week.

July 7 update

Rock scalers dislodge loose material on the milepost 188 slide
Rock scalers dislodge loose material on the milepost 188 slide

The Idaho Transportation Department plans to open US-95 to traffic between Pollock and Riggins tomorrow, Wednesday (July 8) following the evaluation of geotechnical experts yesterday and positive results from continued monitoring. The highway will only open during the day to allow observation of the slope.

“Yesterday geotechnical professionals measured the slope to identify short-term options to get the highway safely open,” Operations Engineer Jared Hopkins said. “Today rock scalers will keep dislodging any loose material.”

Crews have closed Old Pollock Road to add gravel and install culverts to help the county repair it for local and commuter traffic. Work is expected to take up to two days.

Recent rain could affect the stability of the slope. More details will be released tomorrow morning.

July 6 evening update

A temporary road is ready around the slide on US-95 at milepost 188.
A temporary road is ready around the slide on US-95 at milepost 188.
Old Pollock Road will be closed from 7 a.m. tomorrow until Wednesday evening as improvements are made for a future non-commercial detour around the slide. 

July 6 morning update

Results from geotechnical surveys on the slide south of Riggins showed significantly less movement on the slope yesterday (July 5), but the highway will remain closed today (July 6) to allow for more monitoring.

Outside experts are examining the slope today to identify short-term and long-term options to stabilize the area. They are also dislodging any loose material.

“By tomorrow morning, we will have more data to compare to the baseline conditions of the slope,” Operations Engineer Jared Hopkins said.

Crews have finished constructing the temporary road around the slide at milepost 188 and have placed barriers to protect future traffic from rockfall.

“When survey results and on-slope evaluations prove that the slide is stable, we will look to open the highway for short periods of time,” Hopkins said. “In the meantime, we are evaluating the condition of Old Pollock Road to see how we may be able to help the county with a locals-only detour.”

The Idaho Transportation Department has submitted feedback to Google Maps to show that Old Pollock Road is currently not open to traffic. There is no detour around the slide.

July 5 update

U.S. Highway 95 will no longer open to traffic between Pollock and Riggins this afternoon to allow for continued monitoring of the slide at milepost 188.

“We know this is contradictory to what we had hoped to accomplish today and will cause long detours for travelers heading home,” ITD District Engineer Doral Hoff said. “However, without enough data and uncertainty about an apparent gap at the top of the hillside, we are concerned it might be active still.”

Yesterday around 4:30 p.m. crews left the site once a crack in the rock face became visible from below. They had been working on a temporary road around the slide as well as building a rock berm and placing container boxes to shield traffic once allowed to pass through.

“The very nature of slides is unpredictable,” Operations Engineer Jared Hopkins said. “At this time, we’re not sure when we will be able to open the highway, but we are continuing to conduct geotechnical surveys and tomorrow will have experts on the slope to pry off any loose material and further analyze its condition.”

July 4 update

An excavator clears rock from the slide at MP 188 on US-95 near Riggins
An excavator clears rock from the slide at MP 188 on US-95 near Riggins

Depending on geotechnical survey results, US-95 between Pollock and Riggins may temporarily open tomorrow afternoon (Sunday, July 5) to allow traffic to drive around the rock slide that has closed the highway since Friday morning.

“We were fortunate that there was no further activity last night, and if repeated surveys show no more movement, we are prepared to open the highway for a short time,” ITD District Engineer Doral Hoff said. “We have surveyors on site right now to periodically gauge the stability of the slope.”

Around 9 a.m. Friday, the slope above milepost 188 crashed onto the highway, leaving a debris field approximately 120 feet long and 40 feet deep at the base. Some rocks measure 25 feet across and just as tall. Continued rockfall throughout the day kept maintenance crews from cleaning up the slide.

Equipment and operators from across the region have been called to the area. Crews are actively working to build a temporary road around the slide with a tall berm and container boxes to protect drivers in the event of more rockfall.

“Even with those protective measures in place, the biggest threat to drivers’ safety will be the stability of the slope above them,” Hoff said. “We cannot open the highway until we know it’s safe, and we won’t know without more surveys taken over time.”

Future conditions for travel are unknown at this time. Drivers should download the 511 app, follow ITD on Facebook and Twitter and pay attention to signs in the area.

Another release will be sent Sunday morning to confirm any opening of the highway.

Transport of oversized windmill loads through North Idaho to begin Thursday night

Picture of a large windmill blade at the Lewiston Port

Update as of 10/16: the first loads are now expected to leave Saturday night.

Approximately 300 oversized loads will travel from the Port of Lewiston to Alberta, Canada over the next two months, with the first load scheduled to leave Thursday night (Oct. 15) at 7 p.m. NexGen Transportation is in the process of delivering the blades and tower sections for 43 windmills, with the largest loads measuring up to 270 feet long and weighing 240,000 pounds.

The loads will depart from the Port of Lewiston every night, except Friday and Saturday nights, to travel north on US-95 to Coeur d’Alene before heading east on I-90 into Montana. Weather conditions may impact the schedule.

Pilot cars will escort the loads on the two-day journey, with flaggers in place to close the following intersections: Idaho Highway 128 and US-12/US-95 (Lewiston), US-95 and Lincoln Avenue/Walnut Way (Coeur d’Alene) and the I-90 and US-95 interchange (Coeur d’Alene).

Drivers can expect delays as the loads move through these intersections. Seven loads are expected each night.

Emergency repairs to Clearwater Memorial Bridge to start tonight

US-12 crosses the Clearwater River.

Update as of 10/16: Work will now take place over the weekend and is anticipated to be complete Sunday night.

Repairs to the Clearwater Memorial Bridge are scheduled to start tonight and run until the end of next week. During this time, joints on the westbound lanes that allow the bridge to expand and contract with the weather will be replaced.

Both directions of traffic will be reduced to one lane each week night from 7 p.m. to 5 a.m. Drivers will be directed to the eastbound side of the bridge to give crews room to work.

Work is scheduled at night to minimize impacts to commuters. However, the nighttime transport of oversized loads between Lewiston and Canada may cause short delays as they leave the port and head north on US-95 for the next two months.

project in 2023 will rehabilitate the 1951 structure, but the joints will not be able to support traffic until then without significant maintenance costs and must be addressed now.

Nez Perce Tribe awarded $19.1 million BUILD grant to support construction of Aht’Wy interchange

Rendering of the interchange planned for the east entrance of the Aht'Wy Plaza and Clearwater River Casino

On September 16, 2020, the Nez Perce Tribe (Tribe) was awarded a $19,134,710 grant by the US Department of Transportation (USDOT) through the Better Utilizing Investments to Leverage Development (BUILD) Transportation Discretionary Grants program to support the rebuild of the Aht’Wy Interchange (Project).  The Project is located on US 95/12, approximately 6 miles east of Lewiston, Idaho; an area which has been recognized as one of Idaho’s most dangerous stretches of road.

“This is great news during what are difficult times for all of us here in the region.  We believe this project will benefit everyone and have a positive impact on the economy of the Lewiston-Clarkston valley,” stated Nez Perce Tribal Executive Committee Chairman, Shannon Wheeler.  “We would like to express our gratitude to MaryBeth Frank-Clark who has worked tirelessly to make this project possible.  We would also like to thank U.S. Senators Jim Risch and Mike Crapo, Congressman Russ Fulcher, Governor Brad Little and State Senator Dan Johnson for their tremendous support of the project,” continued Wheeler.

This Project, in development since 1998, is designed to address the findings of an Idaho Transportation Department (ITD) Traffic Impact Study which identified the need for certain roadway improvements in the area. Over the last 11 years, the Tribe has spent over $2 million of their Tribal Transportation Program funds on the Project.

The Project will include construction of a diamond-shaped interchange and replacement of the current at-grade intersection with an overpass to access the plaza, on the east entrance. There will also be additions of deceleration and acceleration ramps for eastbound traffic. Additionally, a broadband conduit and pedestrian walkway will be included. The anticipated cost of the entire Project is $20,141,800; with the difference being funded by the Tribe.

“This interchange will be a welcomed addition to the infrastructure, not only here locally but statewide as many people throughout the region travel this route.  We are pleased to hear of the Nez Perce Tribe’s success in obtaining this funding and appreciate our continued, strong working relationship,” stated ITD District Engineer, Doral Hoff.

The final plans, specifications, and estimates (PS&Es) are expected to be completed within four to six months. It is anticipated that the Project will be sent out for bids in approximately 12 months.  Once construction begins, following an approved bid, the Project is estimated to take 12-18 months to complete construction.

Some benefits of the Project include reduced delays experienced by the local transit system and improved access to Clearwater River tourist areas and major employment centers. It will also improve the efficiency and safety of freight movement, especially for the agricultural and logging industries.

“The Aht’Wy Interchange Project has been in the works for some time and we are thrilled to finally move toward completion of this vital project,” stated Nez Perce Tribe Transportation Manager, MaryBeth Frank-Clark. “I would like to express my gratitude to the US Department of Transportation and all of those who have supported the effort to make this project a reality. I would specifically like to recognize the former Nez Perce Tribe Executive Director, Rebecca Miles; JUB Engineer Aht’Wy Interchange Project Manager, John Watson; the Bureau of Indian Affairs Northwest Regional Office of DOT; ITD District 2, Doral Hoff and Ken Helm; the Nez Perce Tribe Office of Legal Counsel; Nez Perce Tribe Wildlife Program; Nez Perce Tribe Cultural Resources Program; and the Nez Perce Tribal Executive Committee for their work on the effort.”

Updates on the Aht’Wy Interchange Project can be found by visiting itdprojects.org/ahtwyinterchange.

More than 1,200 cited in two-week long effort to increase seat belt use 

BOISE – The results are in and after statewide enforcement and awareness effort to buckle up, participating officers issued 1,265 citations for seat belt violations. 

In Idaho, the seat belt use rate is 85%. The mobilization efforts exist for the remaining 15% who still don’t buckle up. In the last five years, from 2015-2019, 56 percent of vehicle occupants killed in Idaho were not restrained and 1,207 unrestrained vehicle occupants were critically injured in traffic crashes. 

“Despite major advancements in vehicle protection, the most effective way to reduce serious injury or fatalities in crashes still remains the simplest task of all: wearing a seat belt,” said Highway Safety Grants Officer Josephine Middleton. 

The mobilization launched July 25 and wrapped up August 7. Typically, the Click It or Ticket campaign runs in May, but given the downturn in traffic counts this spring due to COVID-19, the Office of Highway Safety ran the mobilization effort later in the summer when more cars were on the road 

Even with the challenges of this year, many agencies found a way to make sure that Idahoans were buckled up when driving during the 100 Deadliest Days,” added Middleton. 

 

 

 

 

Commerce improved as restrictions reduced on US-95, Idaho’s main north-south highway

BOISE – Commerce within Idaho has been improved as restrictions to most legal loads have been reduced for the 538-mile stretch of US-95 within Idaho, which travels through 13 counties from the Oregon Border north to the Canadian Border. This is the result of a multi-year effort by the Idaho Transportation Board, based on information from industry leaders on the need to allow greater ease of commerce on the highway.

US-95 is the state’s primary north-south route, and was established as one of the country’s first national highways in 1926.

Recent improvements to the highway, particularly between Council and Grangeville, have resulted in a reduction of restrictions to the route. Because of those improvements, the highway will now allow up to 53-foot trailers without a permit and permitted vehicle combinations up to 115 feet in overall length, with a 6.5-foot off tracking and weight limit of up to 129,000 lbs.

“These improvements allow all of US-95 to have the same legal and permitted requirements from one section to the next, thus increasing the safety, mobility and economic opportunity for commercial vehicles specifically, and all motorists in general,” said Idaho Transportation Board Chairman Bill Moad.

Previously, permitted vehicle combinations were only allowed in loads up to 95 feet long and a 5.5-foot off track — a 21% increase in allowable length and 18% increase in allowable off-tracking — allowing more freedom in the movement or goods and services while also maintaining a safe roadway.

Off-tracking refers to the different paths that the front and rear wheels take when cornering. The rear or trailer wheels will take a shorter path around the curve, corner or turn. Thus, the driver has to compensate for this by taking the curve, corner or turn wider. So, the 6.5-foot off-track is the difference in the path of the first inside front wheel and of the last inside rear wheel as the vehicle negotiates a curve.

Idaho Highway 8 to be resurfaced starting Tuesday

Idaho Highway 8 near Bovill

Idaho Highway 8 will be resurfaced from Bovill east toward Elk River over the next two months, with work set to begin Tuesday, August 4. Resurfacing seven miles of the highway from its intersection with Idaho Highway 3 and Ruby Creek will provide a smoother ride for drivers.

Crews will work 5 a.m. to 7 p.m. from Monday through Saturday. During working hours only, the highway will be reduced to one lane.

A nearby project to fill in cracks and resurface 13.5 miles of ID-9 between Harvard and Deary is expected to wrap up in mid-August.

Visit 511.idaho.gov before traveling to see what impacts you may encounter on your route.

Sealcoat on US-12 & US-95 to get underway Wednesday to protect highway surface

US-95 between Spalding and Lewiston that will be sealcoated in July 2020

Crews will begin sealcoating portions of US-12 and US-95 starting Wednesday, July 22 to protect the roadway surface and provide greater traction for motorists. This work is expected to extend into early August.

The work will take place in a 30-mile stretch of US-12, from Spalding Bridge to the west end of Orofino, and a five-mile stretch of US-95, from the Spalding Bridge to the west end of Aht’Wy Plaza. The work will begin near Orofino and progress west.

Delays of up to 15 minutes can be expected, with east- and westbound traffic reduced to one lane each through four-lane sections and all traffic reduced to one lane through two-lane sections during working hours. A pilot car will be used to safely guide traffic. It will be a “rolling” work zone, progressing in two-mile segments as the work moves.

Crews will work a weekday schedule of 7:30 a.m. to 6:30 p.m. No weekend work is anticipated but may be required in order to achieve a timely completion of the project.

Sealcoating is a surface treatment performed during the summer months to preserve and extend the life of Idaho’s roadways by applying a layer of oil and rock chips. The process requires hot temperatures and dry weather for rocks to properly adhere to the oil.

Rock chips placed during sealcoats have potential to cause windshield damage so drivers are cautioned to slow down when traveling to and from these areas.

Community invited to take survey on construction plans for the Clearwater Memorial Bridge

US-12 crosses the Clearwater River.

The Idaho Transportation Department (ITD) is surveying the community this month in relation to plans for replacing the Clearwater Memorial Bridge on US-12 in Lewiston.

A survey will be open until August 3 at itdprojects.org/us12memorialbridge. The department will also conduct in-person surveys of pedestrians and bicyclists on the bridge this Sunday and Monday.

“We recognize that the Clearwater Memorial Bridge is an important asset to this community,” Project Manager Curtis Arnzen said. “As plans are finalized we will speak with stakeholders to learn how we can best accommodate them during construction.”

Construction will include building a new bridge deck over the existing piers. The new deck will feature the same number of lanes but also provide wider sidewalks, shoulders and a painted median.

Design plans will be completed in 2021, and construction is anticipated to begin in 2023.