Montana Department of Transportation

Malcolm “Mack” Long, Director

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Active Project - Bonner Bridges Project Weekly Updates

Bonner Bridges Project Weekly Updates

Bonner Bridges Project

Weekly Updates

September 2, 2021

  • The Montana Department of Transportation (MDT) and Montana Rail Link (MRL) have agreed upon a pier removal and bridge mitigation alternative in the Blackfoot River. At this time, MDT and MRL are working together to implement the preferred design option as funding and timeline are determined.
  • At the end of 2019, the Montana Department of Transportation (MDT) completed the reconstruction of the Interstate 90 bridges crossing the Blackfoot River. However, the piers at the Bonner Bridges site were not removed due to additional costs that would be incurred. These costs include the maintenance costs for another bridge (MRL) in the Blackfoot River that would be required if the piers were removed.
  • Since completing the Bonner Bridges project in 2019, MDT has continued to seek opportunities and funding to remove the piers.
  • The Montana Department of Transportation was in conversation with numerous stakeholders in order to determine the best possible solution for pier removal moving forward. MDT's primary factors when considering solutions were safety, efficiency, and environmental sensitivity.
  • Recently, MDT has partnered with consultants to review various alternatives for the removal of the two piers from the Blackfoot River. These options take into consideration the Montana Rail Link bridge located just south of the piers and the protection of the surrounding environment.
  • MDT and MRL have now come to an agreement on an alternative that requires piles socketed into the bedrock next to the piers to stabilize the structure. The alternative would lower the footprint in the river, increase safety for fish, recreationalists, and wildlife and offer a solution for all parties. The total price tag for mitigation of the MRL bridge and pier removal is approximately $9 million in total.
  • The Montana Department of Transportation and Montana Rail Link are hard at work to acquire the necessary funding to complete this project and determine when it can take place. We understand that the removal of the piers in the Blackfoot River is a priority and are doing everything possible to move the project along swiftly.
  • Questions? Please email Becca at becca@bigskypublicrelations.com with questions. Prefer to be updated via text? Text Bonnerbridges to 41411.

Previous Updates

May 7, 2021

  • Thank you for your patience as the Montana Department of Transportation (MDT) continues working with Montana Rail Link (MRL) regarding the Bonner Bridges project. Team members are in communication to propose next steps for Blackfoot River pier removal.
  • As you know, over the past few months, MDT has been in contact with consultants to review various alternatives for the removal of the two piers from the Blackfoot River. These options take into consideration the Montana Rail Link bridge located just south of the piers and protection of the surrounding environment.
  • Later this month, MDT will be holding a meeting with MRL partners to review and discuss proposed pier removal options that are currently in the works. Updates will be communicated promptly to stakeholders as more details become available.
  • Please email Becca at becca@bigskypublicrelations.com with questions.
  • Prefer to be updated via text? Text Bonnerbridges to 41411.

February 5, 2021

  • The Montana Department of Transportation (MDT) continues working with Montana Rail Link (MRL) to determine the best appropriate next steps for Blackfoot River pier removal.
  • Through February, MDT will be working with consultants to review pier removal alternatives. The project team will have additional information in March.
  • To provide project background for those that may not have received previous email updates, MDT reconstructed Interstate 90 bridges crossing the Blackfoot River near Bonner in late 2019. However, the piers at the Bonner Bridges site were not removed due to additional mitigation costs for the upstream Montana Rail Link (MRL) bridge. Since this time, MDT has continued to seek opportunities and funding sources to remove the old I 90 bridge piers and are currently working towards this goal.
  • The general public and media will be updated as soon as more information is available. Please reach out with any questions.

January 4, 2021

  • As many now know, the Montana Department of Transportation (MDT) reconstructed Interstate 90 bridges crossing the Blackfoot River near Bonner completing the construction in late 2019. However, the piers at the Bonner Bridges site were not removed due to additional mitigation costs for the upstream Montana Rail Link (MRL) bridge. Since this time, MDT has continued to seek opportunities and funding sources to remove the old I-90 bridge piers.
  • The original analysis of the pier removal, and its impact to the MRL bridge, was completed with a one-dimensional hydraulic model in 2018. This study measured the river’s scour, or impact, on the MRL bridge if the piers were removed. This model determined that pier removal would have a negative effect on the MRL bridge causing a pause in the pier removal schedule in 2019.
  • The most recent analysis completed by MDT has been accomplished with a two-dimensional model to measure the impact of pier removal on the MRL bridge. This updated analysis method has been approved and results have been re-tested by both an outside consultant as well as the Federal Highway Administration resource center to confirm its validity. The results indicate that removal of the piers would increase scour, or impact, on the MRL bridge. However, the water pressure below the surface is actually decreasing. Therefore, the negative impact of pier removal on the MRL bridge is not as significant or concerning as it was earlier determined.
  • All this said, the Montana Department of Transportation is continuing to work with Montana Rail Link to identify the appropriate next steps for pier removal and are hopeful for a solution in the near future. The time frame for pier removal is dependent on both MRL bridge mitigation and federal funding opportunities.
  • Please call 406-207-4484 or email Becca at with any questions or to sign up for project updates.

December 7, 2019

  • At the end of 2019, the Montana Department of Transportation (MDT) completed the reconstruction of the Interstate 90 bridges crossing the Blackfoot River. However, the piers at the Bonner Bridges site were not removed due to additional costs that would be incurred. These costs include the maintenance costs for another bridge in the Blackfoot river that would be required if the piers were removed.
  • Since completing bridge stabilization on the Bonner Bridges in 2019, MDT has continued to seek opportunities and funding to remove the piers.
  • At this time, as of December 2020, the Montana Department of Transportation is in conversation with numerous stakeholders in order to determine the best possible solution for pier removal moving forward. MDT’s primary factors when considering solutions are safety, efficiency and environmental sensitivity.
  • The general public and media will be updated as soon as more information is available.
  • Please call 406-207-4484 or email Becca at with any questions or to sign up for project updates.

November 8, 2019

  • This will be the final regularly scheduled construction update for the Bonner Bridges project. As construction is winding down, winter weather is picking up and MDT encourages all motorists to drive safely in all construction zones.
  • Weather-permitting, look for big changes in the coming week! Traffic will be able to drive on the newly built westbound bridge, likely with a one-lane configuration. A similar configuration will exist on the eastbound structure. Contractor and crews will continue to work in the area, and traffic will return to a normal configuration before the Thanksgiving holiday.
  • No additional closures will take place on the Blackfoot River as associated to bridge reconstruction. A notice will be released when the pedestrian path is available for local access.
  • Please reach out if you have questions by calling our hotline at 406-207-4484. It has been our pleasure to provide updates and information throughout the life of the project. Additional updates may come through in the coming weeks as needed; however, construction is now complete and all travelers can enjoy these improved structures.

November 1, 2019

  • As construction is winding down, winter weather is picking up and MDT encourages all motorists to drive safely in the construction zone.
  • The endcap logos are being hung as work wraps up- a sneak peek is attached. Please remember the pedestrian path is closed at this time, but will be open soon.
  • At present, the Blackfoot River is open under the Bonner Bridges (though it may be a little chilly for recreation).
  • Please reach out if you have questions by calling our hotline at 406-207-4484.

October 25, 2019

  • Final construction on the Bonner Bridges is wrapping up. The pedestrian path is currently closed, but will be available for public use in the coming months. Though construction is winding down, winter weather is picking up and MDT encourages all motorists to drive safely in the construction zone.
  • At present, the Blackfoot River is open under the Bonner Bridges (though it may be a little chilly for recreation).
  • In early November, the endcap logos will be hung. We'll notify the community when these are available for viewing from the newly completed pedestrian path.
  • Please reach out if you have questions by calling our hotline at 406-207-4484.

October 18, 2019

  • Final construction on the Bonner Bridges is wrapping up. The pedestrian path is currently closed, but will be available for public use in the coming months. Please note that the work bridge over the Blackfoot River will be removed in the coming weeks.
  • At present, the Blackfoot River is open under the Bonner Bridges.
  • In early November, the endcap logos will be hung. We'll notify the community when these are available for viewing from the newly completed pedestrian path.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly SMS texting updates by texting “BONNER” to 41411.
  • Please reach out if you have questions by calling our hotline at 406-207-4484.

October 11, 2019

  • Construction continues at the Bonner Bridges project on Interstate 90. In October, deck grooving, approaches, guard rail, and path work will be underway. The pedestrian path is currently closed, but will be available for public use in the coming months.
  • At present, the Blackfoot River is open under the Bonner Bridges.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly SMS texting updates by texting “BONNER” to 41411.
  • Please reach out if you have questions by calling our hotline at 406-207-4484.

October 4, 2019

  • Construction continues at the Bonner Bridges project on Interstate 90. In October, deck grooving, approaches, guard rail, and path work will be underway. The pedestrian path is currently closed, but will be available for public use in the coming months.
  • At present, the Blackfoot River is open under the Bonner Bridges.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly SMS texting updates by texting “BONNER” to 41411.
  • Please reach out if you have questions by calling our hotline at 406-207-4484.

September 27, 2019

  • Construction continues at the Bonner Bridges project on Interstate 90. Deck pouring activities continue into the coming week, with some work to prepare for the bridge completion in the coming months. In October, deck grooving, approaches, guard rail, and path work will be underway. The pedestrian path will still be closed, but is approaching completion.
  • At present, the Blackfoot River is open under the Bonner Bridges.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly SMS texting updates by texting “BONNER” to 41411.
  • Please reach out if you have questions by calling our hotline at 406-207-4484.

September 13, 2019

  • Construction continues at the Bonner Bridges project on Interstate 90. Deck pouring activities will begin next week. Please continue to avoid using the pedestrian facilities under the Bonner Bridges.
  • At present, the Blackfoot River is open under the Bonner Bridges.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly SMS texting updates by texting “BONNER” to 41411.
  • Pedestrian facilities running under the Bonner Bridges are closed during active construction and the construction deck is not open to the public.
  • Please reach out if you have questions by calling our hotline at 406-207-4484.

September 6, 2019

  • Construction continues at the Bonner Bridges project on Interstate 90. Deck pouring activities are likely to start in the coming weeks.
  • At present, the Blackfoot River is open under the Bonner Bridges.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly SMS texting updates by texting “BONNER” to 41411.
  • Pedestrian facilities running under the Bonner Bridges are closed during active construction and the construction deck is not open to the public.
  • Please reach out if you have questions by calling our hotline at 406-207-4484.

August 23, 2019

  • Construction continues at the Bonner Bridges project on Interstate 90. Preparation to pour the deck is ongoing- expect to see crews placing rebar, and setting up for the bridge deck pours. Weather permitting, crews will begin pouring the new deck in early September.
  • Plan ahead for greatly decreased speeds and potential short delays between East Missoula and Turah. Sign up for text alerts (see info below) in the case of extended delays.
  • Wide loads restricted after East Missoula, exit 106. Find more information at Travel Conditions.
  • At present, the Blackfoot River is open under the Bonner Bridges.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly SMS texting updates by texting “BONNER” to 41411.
  • Pedestrian facilities running under the Bonner Bridges are closed during active construction and the construction deck is not open to the public.
  • Please reach out if you have questions by calling our hotline at 406-207-4484.

August 16, 2019

  • Construction continues at the Bonner Bridges project on Interstate 90. Decking is ongoing, with no delays at the work site.
  • Plan ahead for greatly decreased speeds and potential short delays between East Missoula and Turah. Sign up for text alerts (see info below) in the case of extended delays.
  • Wide loads restricted after East Missoula, exit 106. Find more information at Travel Conditions.
  • At present, the Blackfoot River is open under the Bonner Bridges.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly SMS texting updates by texting “BONNER” to 41411.
  • Pedestrian facilities running under the Bonner Bridges are closed during active construction and the construction deck is not open to the public.
  • Please reach out if you have questions by calling our hotline at 406-207-4484.

August 9, 2019

  • Construction continues at the Bonner Bridges project on Interstate 90.
  • Plan ahead for greatly decreased speeds and potential short delays between East Missoula and Turah. Sign up for text alerts (see info below) in the case of extended delays.
  • Wide loads restricted after East Missoula, exit 106. Find more information at Travel Conditions.
  • At present, the Blackfoot River is open under the Bonner Bridges.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly SMS texting updates by texting “BONNER” to 41411.
  • Pedestrian facilities running under the Bonner Bridges are closed during active construction and the construction deck is not open to the public.
  • Please reach out if you have questions by calling our hotline at 406-207-4484.

August 2, 2019

  • Construction continues at the Bonner Bridges project on Interstate 90.
  • Plan ahead for greatly decreased speeds and potential short delays. Sign up for text alerts (see info below) in the case of extended delays.
  • Traveling east on I90, expect construction zones from Wye - Turah. Plan for additional travel time and consider alternate route if possible.
  • Wide loads restricted after East Missoula, exit 106. Find more information at Travel Conditions.
  • At present, the Blackfoot River is open under the Bonner Bridges.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly SMS texting updates by texting “BONNER” to 41411.
  • Pedestrian facilities running under the Bonner Bridges are closed during active construction and the construction deck is not open to the public.
  • Please reach out if you have questions by calling our hotline at 406-207-4484.

July 19, 2019

  • Traveling east on I90, expect additional work zones as construction continues at East Missoula and Bonner.
  • Construction continues at the Bonner Bridges project on Interstate 90. All traffic is transitioned onto the eastbound bridge.
  • Crews are setting girders in the coming week. Please anticipate short delays; plan ahead for greatly decreased speeds and potential short delays. Sign up for text alerts (see info below) in the case of extended delays.
  • At present, the Blackfoot River is open under the Bonner Bridges. River users should sign up for text alerts to receive up-to-date information on the river closure status.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly SMS texting updates by texting “BONNER” to 41411. Regular updates are sent during active construction to those who have registered.
  • Pedestrian facilities running under the Bonner Bridges are closed during active construction and the construction deck is not open to the public.
  • Please reach out if you have questions by calling our hotline at 406-207-4484.

July 8, 2019

  • Construction continues at the Bonner Bridges project on Interstate 90. All traffic is transitioned onto the eastbound bridge.
  • Be aware of traffic control devices, decreased speeds and two-way traffic across the bridge. Slow down in the work zone; follow all posted signage and traffic control.
  • Crews are working to prepare to set girders in the coming weeks. The current bridge sections are in place to allow for forming and pouring of pier caps.
  • At present, the Blackfoot River is open under the Bonner Bridges. River users should sign up for text alerts to receive up-to-date information on the river closure status.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly SMS texting updates by texting “BONNER” to 41411. Regular updates are sent during active construction to those who have registered.
  • Pedestrian facilities running under the Bonner Bridges are closed during active construction and the construction deck is not open to the public.
  • Please reach out if you have questions by calling our hotline at 406-207-4484.

June 28, 2019

  • Construction continues at the Bonner Bridges project on Interstate 90. All traffic is transitioned onto the eastbound bridge. In the coming week, expect work to pause by the end of the day on Wednesday, July 3 to accommodate for holiday travel.
  • However, all traffic control devices, decreased speeds and two-way traffic across the bridge will remain in place through the holiday weekend. Slow down in the work zone; follow all posted signage and traffic control.
  • Crews plan to finish forming pier caps and pouring those caps the week of June 30.
  • At present, the Blackfoot River is open under the Bonner Bridges. River users should sign up for text alerts to receive up-to-date information on the river closure status.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly email updates by contacting Sarah . SMS texting updates are also available by texting “BONNER” to 41411. Regular updates are sent during active construction to those who have registered.
  • Pedestrian facilities running under the Bonner Bridges are closed during active construction and the construction deck is not open to the public.

June 21, 2019

  • Construction continues at the Bonner Bridges project on Interstate 90. All traffic is transitioned onto the eastbound bridge. Motorists should expect traffic control devices, decreased speeds and two-way traffic across the bridge. Slow down in the work zone; follow all posted signage and traffic control.
  • Crews will start forming and placing concrete for the pier columns that will sit atop the drilled shafts. Expect some noise while slope stability pilings are hammered.
  • At present, the Blackfoot River is open under the Bonner Bridges. River users should sign up for text alerts to receive up-to-date information on the river closure status.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly email updates by contacting Sarah . SMS texting updates are also available by texting “BONNER” to 41411. Regular updates are sent during active construction to those who have registered.
  • Pedestrian facilities running under the Bonner Bridges are closed during active construction and the construction deck is not open to the public.

June 14, 2019

  • Construction is underway at the Bonner Bridges project on Interstate 90. All traffic is transitioned onto the eastbound bridge. Motorists should expect traffic control devices, decreased speeds and two-way traffic across the bridge. Slow down in the work zone; follow all posted signage and traffic control.
  • Crews are working on drilled shaft and abutment construction. Drilled shafts are the in-ground supports for new columns that will be constructed at each end of the bridge. Work on abutments is intended to provide additional support at the bridge ends. Looking ahead to the week of June 17, crews will start forming and placing concrete for the pier columns that will sit atop the drilled shafts. Expect some noise while slope stability pilings are hammered.
  • At present, the Blackfoot River is open under the Bonner Bridges. River users should sign up for text alerts to receive up-to-date information on the river closure status.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly email updates by contacting Sarah . SMS texting updates are also available by texting “BONNER” to 41411. Regular updates are sent during active construction to those who have registered.
  • Pedestrian facilities running under the Bonner Bridges are closed during active construction and the construction deck is not open to the public.

June 7, 2019

  • Construction is underway at the Bonner Bridges project on Interstate 90. All traffic is transitioned onto the eastbound bridge. Motorists should expect traffic control devices, decreased speeds and two-way traffic across the bridge. Slow down in the work zone; follow all posted signage and traffic control.
  • At present, the Blackfoot River is open under the Bonner Bridges. River users should sign up for text alerts to receive up-to-date information on the river closure status.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly email updates by contacting Sarah . SMS texting updates are also available by texting “BONNER” to 41411. Regular updates are sent during active construction to those who have registered.
  • Pedestrian facilities running under the Bonner Bridges are closed during active construction and the construction deck is not open to the public.

May 31, 2019

  • Construction is underway at the Bonner Bridges project on Interstate 90. All traffic is transitioned onto the eastbound bridge. Motorists should expect traffic control devices, decreased speeds and two-way traffic across the bridge. Slow down in the work zone; follow all posted signage and traffic control.
  • At present, the Blackfoot River is open under the Bonner Bridges. River users should sign up for text alerts to receive up-to-date information on the river closure status.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly email updates by contacting Sarah . SMS texting updates are also available by texting “BONNER” to 41411. Regular updates are sent during active construction to those who have registered.
  • Pedestrian facilities running under the Bonner Bridges are closed during active construction and the construction deck is not open to the public.

May 24, 2019

  • Get an up-close look at bridge demolition at the Bonner Bridges.
  • All crews will be off of construction sites today, Friday May 24 at noon to accommodate for holiday traffic. Crews will return to work on Tuesday, May 28. Please continue to decrease speed and follow all signage in the work zone.
  • Construction is underway at the Bonner Bridges project on Interstate 90. All traffic is transitioned onto the eastbound bridge. Motorists should expect traffic control devices, decreased speeds and two-way traffic across the bridge. Slow down in the work zone; follow all posted signage and traffic control.
  • At present, the Blackfoot River is open under the Bonner Bridges. River users should sign up for text alerts to receive up-to-date information on the river closure status.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly email updates by contacting Sarah . SMS texting updates are also available by texting “BONNER” to 41411. Regular updates are sent during active construction to those who have registered.
  • Pedestrian facilities running under the Bonner Bridges are closed during active construction and the construction deck is not open to the public.

May 17, 2019

  • Get an up-close look at bridge demolition at the Bonner Bridges.
  • Construction is underway at the Bonner Bridges project on Interstate 90. All traffic is transitioned onto the eastbound bridge. Motorists should expect traffic control devices, decreased speeds and two-way traffic across the bridge. Slow down in the work zone; follow all posted signage and traffic control.
  • At present, the Blackfoot River is open under the Bonner Bridges. River users should sign up for text alerts to receive up-to-date information on the river closure status. While the river closure is in effect, all recreationists should take out at the Weigh Station. The river closure extends from the Weigh Station on Highway 200 to the Milltown State Park. Once the river is safe for recreational use, Fish, Wildlife and Parks will reopen the river.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly email updates by contacting Sarah . SMS texting updates are also available by texting “BONNER” to 41411. Regular updates are sent during active construction to those who have registered.
  • Pedestrian facilities running under the Bonner Bridges are closed during active construction and the construction deck is not open to the public.

May 10, 2019

  • Construction is underway at the Bonner Bridges project on Interstate 90. All traffic is transitioned onto the eastbound bridge. Motorists should expect traffic control devices, decreased speeds and two-way traffic across the bridge. Slow down in the work zone; follow all posted signage and traffic control.
  • Good news! The Blackfoot River closure will be lifted tomorrow, Saturday, May 11. At that time, floating will be allowed under the Bonner Bridges.
  • River users should sign up for text alerts to receive up-to-date information on the river closure status. While the river closure is in effect, all recreationists should take out at the Weigh Station. The river closure extends from the Weigh Station on Highway 200 to the Milltown State Park. Once the river is safe for recreational use, Fish, Wildlife and Parks will reopen the river. For your safety, please do not float through the project area.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly email updates by contacting Sarah . SMS texting updates are also available by texting “BONNER” to 41411. Regular updates are sent during active construction to those who have registered.
  • Pedestrian facilities running under the Bonner Bridges are closed during active construction and the construction deck is not open to the public.

May 2, 2019

  • Construction has begun at the Bonner Bridges project on Interstate 90. All traffic is transitioned onto the eastbound bridge. Motorists should expect traffic control devices, decreased speeds and two-way traffic across the bridge. Slow down in the work zone; follow all posted signage and traffic control.
  • Due to construction, the Blackfoot River is closed under the Bonner Bridges. River users should sign up for text alerts to receive up-to-date information on the river closure status. While the river closure is in effect, all recreationists should take out at the Weigh Station. The river closure extends from the Weigh Station on Highway 200 to the Milltown State Park. Once the river is safe for recreational use, Fish, Wildlife and Parks will reopen the river. For your safety, please do not float through the project area.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly email updates by contacting Sarah . SMS texting updates are also available by texting “BONNER” to 41411. Regular updates are sent during active construction to those who have registered.
  • Pedestrian facilities running under the Bonner Bridges are closed during active construction and the construction deck is not open to the public.

April 26, 2019

  • Construction has begun at the Bonner Bridges project on Interstate 90. All traffic is transitioned onto the eastbound bridge. Motorists should expect traffic control devices, decreased speeds and two-way traffic across the bridge. Slow down in the work zone; follow all postage signage and traffic control.
  • Due to construction, the Blackfoot River is closed under the Bonner Bridges until late spring. River users should sign up for text alerts to receive up-to-date information on the river closure status. While the river closure is in effect, all recreationists should take out at the Weigh Station. The river closure extends from the Weigh Station on Highway 200 to the Milltown State Park. Once the river is safe for recreational use, Fish, Wildlife and Parks will reopen the river. For your safety, please do not float through the project area.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly email updates by contacting Sarah . SMS texting updates are also available by texting “BONNER” to 41411. Regular updates are sent during active construction to those who have registered.
  • Pedestrian facilities running under the Bonner Bridges are closed during active construction and the construction deck is not open to the public.

April 19, 2019

  • Construction has begun at the Bonner Bridges project on Interstate 90. All traffic is transitioned onto the eastbound bridge. Motorists should expect traffic control devices, decreased speeds and two-way traffic across the bridge.
  • Slow down in the work zone; follow all postage signage and traffic control.
  • Due to construction, the Blackfoot River will be closed under the Bonner Bridges until late spring. River users should sign up for text alerts to receive up-to-date information on the river closure status.While the river closure is in effect, all recreationists should take out at the Weigh Station. The river closure extends from the Weigh Station on Highway 200 to the Milltown State Park. Once the river is safe for recreational use, Fish, Wildlife and Parks will reopen the river. For your safety, please do not float through the project area.
  • Those looking for continual updates about the Bonner Bridges project are advised to sign up for weekly email updates by contacting Sarah . SMS texting updates are also available by texting “BONNER” to 41411. Regular updates are sent during active construction to those who have registered.
  • Pedestrian facilities running under the Bonner Bridges are closed during active construction and the construction deck is not open to the public.

August 30, 2018

August 6, 2018

  • The Montana Department of Transportation wishes to thank all participants in the recent design workshop for this project; community input will be used to shape endcap design options for the Bonner Bridges once they are completed. See the Community Participation section below for more information.
  • Work to remove the piers under Interstate 90 continues. Currently, crews are working on the strengthening the substructure of the bridge. Starting July 23, slope stabilization will begin as well; some noise may accompany this work. Noise will occur during work hours between 7:30 am and 6:00 pm on workdays.
  • Two-way traffic is routed onto the existing westbound bridge, and traffic is reduced to single lanes in each direction through the work zone. During the construction, travelers on Interstate 90 should expect lower speed limits and traffic congestion. Please be mindful of signage. Pedestrian facilities running under the Bonner Bridges are closed during active construction.
  • Community Participation:
  • Save the Date for an open house for the Bonner Bridges project. The project team will be on-hand to answer questions, including those questions about timeline, budget and construction. A voting session will also be held at the Open House to help determine the design on the Bonner Bridge endcaps.
  • When: Monday, August 6th 3:00 - 6:00 p.m.
    Where: Bonner School
    Who: Everyone is invited to attend
    What: Open House
    Why: Learn more about the project and vote on the design of endcaps
  • River Closure Information:
  • Fish, Wildlife and Parks has lifted the closure of the Blackfoot River from the Weigh Station to the Milltown State Park. The next planned closure of the Blackfoot River is scheduled for August 27 - September 8, 2018 (closures dates subject to change due to weather and river conditions).
  • Project Information:
  • To sign up for text alerts about the project, please text BONNER to 41411 (standard data and messaging rates apply).
  • Wide loads should refer to detailed passage instructions here.
  • In the continual effort to provide regular and updated communication to the public, the Montana Department of Transportation will be hosts a weekly meeting at the Salvation Army in Missoula each Tuesday from 1:30 - 2:30 p.m. This time is designed for members of the public to stop by to ask questions or provide feedback on any of the Missoula urban-area projects; including Russell Street – Broadway to Dakota, the Van Buren Street Interchange, Bonner Bridges and ADA improvements.

July 20, 2018

  • Work to remove the piers under Interstate 90 continues. Currently, crews are working on the strengthening the substructure of the bridge. Starting July 23, slope stabilization will begin as well; some noise may accompany this work. Noise will occur during work hours between 7:30 am and 6:00 pm on workdays.
  • Two-way traffic is routed onto the existing westbound bridge, and traffic is reduced to single lanes in each direction through the work zone. During the construction, travelers on Interstate 90 should expect lower speed limits and traffic congestion. Please be mindful of signage. Pedestrian facilities running under the Bonner Bridges are closed during active construction.

July 13, 2018

  • The Montana Department of Transportation wishes to thank all participants in the recent design workshop for this project; community input will be used to shape endcap design options for the Bonner Bridges once they are completed. See the Community Participation section below for more information.
  • Work to remove the piers under Interstate 90 continues. Currently, crews are working on the strengthening the substructure of the bridge. Starting July 23, slope stabilization will begin as well; some noise may accompany this work. Noise will occur during work hours between 7:30 am and 6:00 pm on workdays.
  • Two-way traffic is routed onto the existing westbound bridge, and traffic is reduced to single lanes in each direction through the work zone. During the construction, travelers on Interstate 90 should expect lower speed limits and traffic congestion. Please be mindful of signage.
  • Pedestrian facilities running under the Bonner Bridges are closed during active construction.
  • Community Participation:
  • Save the Date for an open house for the Bonner Bridges project. The project team will be on-hand to answer questions, including those questions about timeline, budget and construction. A voting session will also be held at the Open House to help determine the design on the Bonner Bridge endcaps.
  • When: Monday, August 6th 3:00 - 6:00 p.m.
    Where: Bonner School (room TBD)
    Who: Everyone is invited to attend
    What: Open House
    Why: Learn more about the project and vote on the design of endcaps
  • River Closure Information:
  • Fish, Wildlife and Parks has lifted the closure of the Blackfoot River from the Weigh Station to the Milltown State Park. The next planned closure of the Blackfoot River is scheduled for August 27 - September 8, 2018 (closures dates subject to change due to weather and river conditions).
  • Project Information:
  • To sign up for text alerts about the project, please text BONNER to 41411 (standard data and messaging rates apply).
  • Wide loads should refer to detailed passage instructions here.
  • In the continual effort to provide regular and updated communication to the public, the Montana Department of Transportation will be hosts a weekly meeting at the Salvation Army in Missoula each Tuesday from 1:30 - 2:30 p.m. This time is designed for members of the public to stop by to ask questions or provide feedback on any of the Missoula urban-area projects; including Russell Street – Broadway to Dakota, the Van Buren Street Interchange, Bonner Bridges and ADA improvements.

July 6, 2018

  • Work to remove the piers under Interstate 90 continues. Two-way traffic is routed onto the existing westbound bridge, and traffic is reduced to single lanes in each direction through the work zone. During the construction, travelers on Interstate 90 should expect lower speed limits and traffic congestion. Please be mindful of signage. Pedestrian facilities running under the Bonner Bridges are closed during active construction.

June 29, 2018

  • Work to remove the piers under Interstate 90 continues. Two-way traffic is routed onto the existing westbound bridge, and traffic is reduced to single lanes in each direction through the work zone. During the construction, travelers on Interstate 90 should expect lower speed limits and traffic congestion. Please be mindful of signage. Pedestrian facilities running under the Bonner Bridges are closed during active construction.
  • For the July 4 holiday, crews will not be on the Bonner Bridges work site. However, traffic control and decreased speeds are in effect throughout the project zone. The work zone will become active again at 7:00 a.m. on Thursday, July 5.

June 15, 2018

  • Work to remove the piers under Interstate 90 continues. Two-way traffic is routed onto the existing westbound bridge, and traffic is reduced to single lanes in each direction through the work zone. During the construction, travelers on Interstate 90 should expect lower speed limits and traffic congestion. Please be mindful of signage. Pedestrian facilities running under the Bonner Bridges are closed during active construction.

June 8, 2018

  • Work to remove the piers under Interstate 90 continues. Two-way traffic is routed onto the existing westbound bridge, and traffic is reduced to single lanes in each direction through the work zone. During the construction, travelers on Interstate 90 should expect lower speed limits and traffic congestion. Please be mindful of signage.
  • Additionally, Fish, Wildlife and Parks has lifted the closure of the Blackfoot River from the Weigh Station to the Milltown State Park. All river users should refer to signage at river access sites and use extreme caution when floating through the construction area under the Bonner Bridges construction zone.The next planned closure of the Blackfoot River is scheduled for August 27 - September 8, 2018 (closures dates subject to change due to weather and river conditions).

June 1, 2018

  • Work to remove the piers under Interstate 90 continues. Two-way traffic is routed onto the existing westbound bridge, and traffic is reduced to single lanes in each direction through the work zone. During the construction, travelers on Interstate 90 should expect lower speed limits and traffic congestion. Please be mindful of signage.
  • Additionally, Fish, Wildlife and Parks has extended the closure of the Blackfoot River from the Weigh Station to the Milltown State Park to ensure the safety of river users. Once the river is safe for recreational use, Fish, Wildlife and Parks will reopen the river at their discretion.

May 25, 2018

  • Work to remove the piers under Interstate 90 continues. During the holiday weekend, from noon on Friday, May 25 to Tuesday, May 29, crews will not be present in the work zone, however two-way traffic will still be routed onto the existing westbound bridge, and traffic will be reduced to single lanes in each direction through the work zone. During the construction, travelers on Interstate 90 should expect lower speed limits and traffic congestion. Please be mindful of signage.
  • Additionally, Fish Wildlife and Parks has extended a planned closure of the Blackfoot River from the Weigh Station to the Milltown State Park through the holiday weekend to ensure the safety of river users. Once the river is safe for recreational use, Fish, Wildlife and Parks will reopen the river at their discretion.
  • Project Information:
  • To sign up for text alerts about the project, please text BONNER to 41411 (standard data and messaging rates apply).
  • Wide loads should refer to detailed passage instructions here.
  • In the continual effort to provide regular and updated communication to the public, the Montana Department of Transportation will be hosts a weekly meeting at the Salvation Army in Missoula each Tuesday from 1:30 - 2:30 p.m. This time is designed for members of the public to stop by to ask questions or provide feedback on any of the Missoula urban-area projects; including Russell Street – Broadway to Dakota, the Van Buren Street Interchange, Bonner Bridges and ADA improvements.