Maintenance to begin on I-270 & US 36 bridge over I-25 in Adams County

Travel Advisory

Feb. 27, 2026 - Denver Metro/Central Colorado - Work will extend structure life and improve safety for motorists

Adams County — The Colorado Department of Transportation and its contractor ABCO Contracting, Inc. will begin planned preventative maintenance of the I-270 & US Highway 36 bridge over I-25. This project will perform ground stabilization and replace critical bridge components, extending the lifespan of the bridge and ensuring long-term structural integrity.

Repairs are scheduled to begin the night of March 1 on the eastbound lanes of US 36 at Mile Point 57 over I-25. Work involves removing deteriorated bridge deck concrete and installing new approach slabs and joints.

Crews will move west across the bridge as work progresses. Beginning the week of March 30, work will expand to include the southbound I-25 off-ramp to eastbound I-270 at MP 217.

Project benefits include:

  • Smoother, more comfortable road surface, making travel safer for vehicles, especially in inclement weather
  • Better drainage and weather resilience, preventing clogging from debris and helping avoid water pooling, hydroplaning risks or flooding
  • Extended lifespan of existing structures, reducing the need for more extensive and disruptive replacements in the future
  • Ground stabilization and updated joints improve infrastructure efficiency and environmental impacts

Traffic Impacts

  • Traffic will be shifted to one lane on eastbound US 36 starting at MP 57 with single lane closures through the duration of the project. A minimum of one lane of traffic will remain open throughout the project
  • Nighttime work hours are 10 p.m. to 6 a.m., Sunday through Thursday. Single lane closures will occur throughout this time during March
  • Daytime work hours are 7 a.m. to 7 p.m., Monday through Friday. Single lane closures will occur throughout this time, starting April 1 and continuing through September 2026
  • Motorists are advised to drive with extreme caution as the travel lanes will be narrowed and crews with heavy equipment will be working in the area
  • Minor traffic delays are expected

The construction schedule could change depending on the weather and other factors. Go to COtrip.org for real-time road conditions and closures.

The project is anticipated to be completed by the end of October 2026.

I-270 Bridge Preventative Maintenance Location Map on US 36 and I-270
I-270 Bridge Preventative Maintenance Location Map on US 36 and I-270

Project Information

For additional information about this project:

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!