CDOT begins bridge repair and overlay project in Boulder County on July 5

Travel Advisory

June 27, 2022 - Northeastern Colorado - The project is designed to improve the structural integrity and extend the service life of two bridges

Boulder County – Starting overnight on July 5, the Colorado Department of Transportation will begin a bridge repair and polyester concrete overlay project in Boulder County. Work includes repairs to two structures. The first, on Colorado Highway 157 just south of Diagonal Highway in Boulder, will undergo extensive deck repairs and safety improvements. This work will be done during overnight hours to minimize traffic impacts. Rehabilitation on the second bridge on CO 7 in the Town of Lyons will be done during daytime hours and includes scour mitigation and riprap installation. These much-needed bridge improvements are being funded by federal and state grants. Structures, Inc. has been selected as the prime contractor for this project.

The Boulder bridge located at Mile Point 3.52 on CO 157 will undergo deck repairs and expansion device and median curb replacement. Surface work includes polyester concrete overlay, new cover plates, concrete sealer, and spall repairs. Maintenance work on the Lyons bridge at Mile Point 32.973 on CO 7 includes adding abutment protection riprap as a scour countermeasure.

Boulder County bridge repair map

Schedule & Working Hours

  • Boulder bridge: July 5 to mid-November - 9 p.m. to 5 a.m. Sunday to Thursday
  • Lyons bridge: Aug. 1 to mid-September - 7 a.m. to 6 p.m. Monday to Friday

Traffic Impacts

Boulder bridge:

  • Starting on Tuesday, July 5, single lane closures and reduced speeds will be in place during overnight hours.
  • Flaggers and construction devices will be present to direct alternating northbound and southbound traffic through the single lane configuration as well as occasionally on the roadway below the bridge.
  • A 12-foot width restriction will exist during working hours.
  • These closures and restrictions will be in place until mid-November.
  • No weekend or observed holiday work is expected.
  • Lane closures and other traffic notices are posted weekly on
  • All construction schedules are weather dependent and subject to change.

Lyons bridge:

  • Starting Aug.1, single lane closures will exist during working hours (7 a.m. to 6 p.m.) Monday to Friday.
  • On weekdays when construction is active, traffic will alternate through a single lane configuration.
  • During nonworking hours, two-way traffic will be separated by a concrete barrier wall.
  • These closures and restrictions will be in place until mid-September.
  • No weekend or observed holiday work is expected.
  • Lane closures and other traffic notices are posted weekly on
  • All construction schedules are weather dependent and subject to change.

Coping with Construction

Besides lane closures, overnight noise and bright lights can be expected during overnight hours while crews perform repairs to the Boulder bridge. Please contact us via phone or email or refer to the web page for more information.

Project Contact Information

For additional information about this project, contact the project team.

Know Before You Go

Travelers are urged to “know before you go.” Gather information about weather forecasts and anticipated travel impacts and current road conditions prior to hitting the road. CDOT resources include:

Remember: Slow For The Cone Zone

The following tips are to help you stay safe while traveling through maintenance and construction work zones.

  • Do not speed in work zones. Obey the posted speed limits.
  • Stay Alert! Expect the unexpected.
  • Watch for workers. Drive with caution.
  • Don't change lanes unnecessarily.
  • Avoid using mobile devices such as phones while driving in work zones.
  • Turn on headlights so that workers and other drivers can see you.
  • Be especially alert at night while driving in work zones.
  • Expect delays, especially during peak travel times.
  • Allow ample space between you and the car in front of you.
  • Anticipate lane shifts and merge when directed to do so.
  • Be patient!

Download the COtrip App!

The new FREE COtrip Planner mobile app was designed to meet the growing trend of information on mobile and tablet devices for the traveling public. The COtrip Planner app provides statewide, real-time traffic information, and works on mobile devices that operate on the iOS and Android platforms. Visit the Google Play Store (Android devices) or the Apple Store (iOS devices) to download!