Montana Department of Transportation

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Big Sky Bridge Decks

Weekly Updates

August 10-14, 2020

  • The Big Sky Bridge Decks project continues construction for the week of August 10. Crews are working on the bridge nearby Little Coyote Road and the bridge by the intersection of MT 64 and US 191.
  • On the bridge by Little Coyote Road, workers are paving bridge ends in the middle of the week to create a smooth transition from road to bridge. They are also installing guardrail near the structure and preparing the eastbound side of the bridge to open. Traffic is expected to switch to the completed side and work will start on the westbound deck during the week of August 17.
  • On the bridge by the intersection of MT 64 and US 191, workers are paving the bridge ends early in the week. This bridge is expected to finish and open to two-way traffic by the end of the week. Crews will then start work on the US 191 bridge two miles north of the turn to Big Sky during the week of August 17.
  • Please note that there is a utility company performing work in the area and this work can add to delay times. This is not associated with the Big Sky Bridge Decks project.
  • Wide loads wider than 11 feet are restricted and will need to find another route throughout construction.
  • Our project hotline is open for questions between 9 a.m. and 5 p.m., Monday through Friday. Call 406-207-4484 to reach us. Text updates are also available. To register, text BIGSKYBRIDGES to 41411.

Previous Updates

July 3-7, 2020

  • The Big Sky Bridge Decks project continues construction for the week of August 3. Crews are working on the bridge nearby Little Coyote Road and the bridge by the intersection of MT 64 and US 191.
  • On the bridge by Little Coyote Road, workers are finishing installing new barrier rails on the sides of the bridges and will reconstruct the bridge ends, forming a smooth surface for the area where the road connects to the bridge. A smooth connection from the road to the bridge not only makes driving easier, it can also keep the bridge from deteriorating more rapidly as water does not easily seep into the structure. Crews will also be removing the bridge deck forms, the equipment used in helping to form the bridge deck.
  • On the bridge by the intersection of MT 64 and US 191, workers are finishing creating a smooth transition from the bridge to the road in order to prep for paving on the bridge ends. Paving the bridge ends is set to start at the end of the week, around August 7. Crews will also be in the area landscaping around the bridge.
  • Crews anticipate that the bridge by the intersection of MT 64 and US 191 will return to two-way traffic by the week of August 10.
  • Wide loads wider than 11 feet are restricted and will need to find another route throughout construction.
  • Our project hotline is open for questions between 9 a.m. and 5 p.m., Monday through Friday. Call 406-207-4484 to reach us. Text updates are also available. To register, text BIGSKYBRIDGES to 41411.

July 27-31, 2020

  • The Big Sky Bridge Decks project continues construction for the week of July 27. Crews are working on the bridge nearby Little Coyote Road and the bridge by the intersection of MT 64 and US 191.
  • On the bridge by Little Coyote Road, workers have poured the concrete surface on the eastbound side of the bridge and the deck is now curing. The crew is now focused on installing new barrier rails on the sides of the bridge and are working on the bridge ends, building a smooth transition from the road to the bridge.
  • On the bridge by the intersection of MT 64 and US 191, crews are pouring concrete on the westbound bridge deck and also working on the bridge ends. They will create a smooth and connected surface from road to bridge in preparation for paving. Paving the bridge ends is expected to occur during the first week of August.
  • Construction on the US 191 bridge two miles north of the turn to Big Sky is expected to start in mid-August, once the MT 64 bridge returns to two-way traffic. The entire project is still on track to finish this fall.
  • Wide loads wider than 11 feet are restricted and will need to find another route throughout construction.
  • Our project hotline is open for questions between 9 a.m. and 5 p.m., Monday through Friday. Call 406-207-4484 to reach us. Text updates are also available. To register, text BIGSKYBRIDGES to 41411.

July 20-24, 2020

  • The Big Sky Bridge Decks project continues construction for the week of July 20. Crews are working on the bridge nearby Little Coyote Road and the bridge by the intersection of MT 64 and US 191.
  • On the bridge by Little Coyote Road, workers are finishing construction on the bottom layers of the eastbound deck and are laying concrete down to form the top surface. The deck will then begin curing, the chemical process needed for the surface to properly harden.
  • On the bridge by the intersection of MT 64 and US 191, workers are making repairs to the westbound bridge deck. They will also remove the asphalt where the bridge connects to the road so that they can make repairs and build a smooth transition from the road to the bridge.
  • Thank you for your patience as we continue work to improve these bridge decks. MDT understands that the bridge deck by MT 64 and US 191 can be busy even without construction and is working to finish this deck as efficiently as possible. Construction on this structure is anticipated to wrap up in early August. Please continue to slow down for the work zone and avoid blocking entrances when waiting in line for the signal.
  • Wide loads wider than 11 feet are restricted and will need to find another route throughout construction.
  • Our project hotline is open for questions between 9 a.m. and 5 p.m., Monday through Friday. Call 406-207-4484 to reach us. Text updates are also available. To register, text BIGSKYBRIDGES to 41411.

July 13-17, 2020

  • The Big Sky Bridge Decks project continues construction for the week of July 13. Crews are working on the bridge by Little Coyote Road and the bridge by the intersection of MT 64 and US 191.
  • On the bridge by Little Coyote Road, workers are reconstructing the bridge deck by forming the bottom layer of the deck. The old bridge deck has been fully removed on phase 1. Crews will continue rebuilding the deck next week as well.
  • On the bridge by the intersection of MT 64 and US 191, crews are paving the bridge ends today and will reconfigure traffic in order to work on the second half of the bridge early next week. Paving was delayed due to problems with the asphalt plant. Once traffic has switched, crews will begin hydro-milling, using high-pressure water to remove the top surface of the bridge deck. This process breaks up the surface while keeping the bottom layers safely intact. Once the surface is removed, crews can fix damage to the underlying layers and re-pave.
  • The Montana Department of Transportation reminds drivers to slow down when in the work zone for both driver safety and the safety of the crew. Fines double in work zones. Additionally, wide loads wider than 11 feet are restricted and will need to find another route throughout construction.
  • Our project hotline is open for questions between 9 a.m. and 5 p.m., Monday through Friday. Call 406-207-4484 to reach us. Text updates are also available. To register, text BIGSKYBRIDGES to 41411.

July 6-10, 2020

  • The Big Sky Bridge Decks project continues construction for the week of July 6. Crews are working on the bridge by Little Coyote Road and the bridge by the intersection of MT 64 and US 191.
  • On the bridge by Little Coyote Road, workers have fully finished demolishing one side of the old bridge deck. They will begin the reconstruction process by installing the bottom layer of the deck on the girders, the beams that the bridge deck will lay on.
  • Rainy weather has caused delays for the bridge by the intersection of US 191 and MT 64. The major work on this structure this past week involved paving the bridge ends to ensure a smooth transition. This paving is dependent on good weather. As a result, work has been shifted to the week of July 6th. Crews will be paving near the ends of the bridge and anticipate shifting traffic to the completed side towards the end of the week.
  • The Montana Department of Transportation reminds drivers to slow down when in the work zone for both driver safety and the safety of the crew. Fines double in work zones.
  • Please be mindful of vehicles turning in and out of the businesses located near the intersection of MT 64 and US 191. Avoid blocking entrances when waiting in line for the traffic signal. Wide loads wider than 11 feet are restricted and will need to find another route throughout construction.
  • Our project hotline is open for questions between 9 a.m. and 5 p.m., Monday through Friday. Call 406-207-4484 to reach us. Text updates are also available. To register, text BIGSKYBRIDGES to 41411.

June 29-July 3, 2020

  • The Big Sky Bridge Decks project continues construction for the week of June 29. Crews are continuing to work on the bridge by Little Coyote Road and the bridge by the intersection of MT 64 and US 191.
  • On the Little Coyote Road bridge, crews are finishing up demo work, fully removing the bridge deck on one side of the structure. Next week, workers will begin the reconstruction process, building a new bridge deck. .
  • On the bridge by the intersection of US 191 and MT 64, crews are paving near the ends of the bridge to ensure a smooth transition from the road. Pending no delays or issues, work on one side of the bridge is expected to finish by July 2nd and traffic will be switched to the completed side of the bridge. After the holiday, crews will start work on the second half of the structure. Any changes to that plan will be communicated during next week’s update.
  • Dick Anderson Construction crews will be off the roadway by noon on Thursday, July 2 to help aid in travel ahead of Independence Day. Both bridges will have the portable traffic signal in place but drivers will not have to navigate with workers nearby.
  • Please be mindful of vehicles turning in and out of the businesses located near the intersection of MT 64 and US 191. Avoid blocking entrances when waiting in line for the traffic signal. Wide loads wider than 11 feet are restricted and will need to find another route throughout construction.
  • Our project hotline is open for questions between 9 a.m. and 5 p.m., Monday through Friday. Call 406-207-4484 to reach us. Text updates are also available. To register, text BIGSKYBRIDGES to 41411.

June 22-26, 2020

  • The Big Sky Bridge Decks project continues construction for the week of June 22. Crews are working on the bridge by Little Coyote Road and the bridge by the intersection of MT 64 and US 191. Drivers can expect single-lane traffic with a traffic signal in place at both structures. In addition, a flagger will be in place on Friday, June 19 by the bridge by the MT 64/US 191 intersection to help guide traffic as the concrete surface is poured.
  • On the Little Coyote Road bridge, crews are continuing to demo, or remove one side of the bridge deck. Workers are expected to finish demolition work by the July 4th weekend. In July, crews will focus on building a new bridge deck on one side of the structure.
  • On the Lone Mountain Trail bridge by the intersection of US 191, crews will be working on the ends of the bridge to ensure a smooth transition from road to bridge. The bridge deck itself will be curing, or hardening. Pending good weather and no delays in construction, one side of the bridge will be complete with traffic switched to the other side by the July 4th weekend.
  • Please be mindful of vehicles turning in and out of the businesses located near the intersection of MT 64 and US 191. Avoid blocking entrances when waiting in line for the traffic signal.
  • Wide loads wider than 11 feet are restricted and will need to find another route throughout construction.
  • Our project hotline is open for questions between 9 a.m. and 5 p.m., Monday through Friday. Call 406-207-4484 to reach us. Text updates are also available. To register, text BIGSKYBRIDGES to 41411.

June 15-19, 2020

  • The Big Sky Bridge Decks project continues construction for the week of June 15. Crews are working on the bridge by Little Coyote Road and the bridge by the intersection of MT 64 and US 191.
  • On the Little Coyote Road bridge, crews are removing one side of the bridge deck in preparation of the bridge deck replacement. This is also expected to continue next week as well.
  • On the Lone Mountain Trail bridge by the intersection of US 191, crews are placing a concrete surface down on one side of the bridge. Once this process is complete, the deck will take over a week to fully cure. The curing process is an important step in construction that ensures that the surface properly hardens, making it stronger and less susceptible to deterioration. This side of the bridge is expected to be mostly complete with construction switching over to the other side of the bridge by early July.
  • Please be mindful of vehicles turning in and out of the businesses located near the intersection of MT 64 and US 191. Avoid blocking entrances when waiting in line for the traffic signal.
  • The Montana Department of Transportation also reminds drivers to be prepared to stop near bridge areas for the Big Sky Bridge Decks project. Only proceed when the portable traffic light is green. If vehicles are waiting in line, please remain patient and do not attempt to go around. This is for everyone’s safety, including drivers and the construction crew. Residents can report dangerous driving behavior by calling 911 or the Gallatin County Non-Emergency Dispatch number, 406-582-2100.
  • Wide loads wider than 11 feet are restricted and will need to find another route throughout construction.
  • Our project hotline is open for questions between 9 a.m. and 5 p.m., Monday through Friday. Call 406-207-4484 to reach us. Text updates are also available. To register, text BIGSKYBRIDGES to 41411.

June 8-12, 2020

  • The Big Sky Bridge Decks project continues construction for the week of June 8. Crews are working on the bridge by Little Coyote Road and the bridge by the intersection of MT 64 and US 191. Drivers can expect single-lane traffic with a traffic signal in place.
  • Crews on the Little Coyote Road bridge are continuing to demo the bridge deck in preparation of the full bridge deck replacement. This process can take several weeks to fully complete.
  • Crews on Lone Mountain Trail by the intersection of US 191 are milling the area close to the bridge deck to create a smooth transition from road to bridge. Paving is expected to occur the week of June 15 on one side of the bridge. Towards late June, construction is expected to switch to the other half of the bridge.
  • Please be mindful of drivers attempting to turn into businesses or other lots near the project area. Avoid blocking entrances when waiting in line for the traffic signal, and avoid parking on the shoulder of MT 64, especially by the project area.
  • The Montana Department of Transportation also reminds drivers to be prepared to stop near bridge areas for the Big Sky Bridge Decks project. Only proceed when the portable traffic light is green. If vehicles are waiting in line, please remain patient and do not attempt to go around. This is for everyone’s safety, including drivers and the construction crew. Residents can report dangerous driving behavior by calling 911 or the Gallatin County Non-Emergency Dispatch number, 406-582-2100.
  • Wide loads wider than 11 feet are restricted and will need to find another route throughout construction.
  • Our project hotline is open for questions between 9 a.m. and 5 p.m., Monday through Friday. Call 406-207-4484 to reach us. Text updates are also available. To register, text BIGSKYBRIDGES to 41411.

June 1-5, 2020

  • The Big Sky Bridge Decks project continues construction for the week of June 1st. Crews are working on bridges by Little Coyote Road and the intersection of Lone Mountain Trail and US 191.
  • Crews on the Little Coyote Road bridge are demoing, removing the west half of the old bridge deck in preparation of the full bridge deck replacement. Workers will fully remove and replace the west half of the bridge before moving to the east half.
  • Crews on Lone Mountain Trail by the intersection of US 191 are using hydro-milling to remove the top layer of the bridge deck. Hydro-milling involves using high-pressure water to break up and remove the surface layer of the deck. This is a key part of the repair process as this technique ensures the underlying layers are not damaged. Milling the bridge as if it were a road could cause severe damage to the layers underneath.
  • Please be prepared to stop at both bridge areas even when crews are not present. A traffic signal is in place to help guide drivers through the area. Wide loads wider than 11 feet are restricted and will need to find another route throughout construction.
  • Our project hotline is open for questions between 9 a.m. and 5 p.m., Monday through Friday. Call 406-207-4484 to reach us. Text updates are also available. To register, text BIGSKYBRIDGES to 41411.