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CDOT has begun construction to replace aging I-76 bridges over York Street in Adams County – Colorado Department of Transportation

Adams County – The Colorado Department of Transportation and Flatiron Constructors Inc. have begun work to replace aging I-76 bridges on York Street and rebuild much of the driving surface on I-76 in the York Streets in Dahlia in Adams County. The project is expected to be completed in the fall of 2024.

Built in 1967, the I-76 bridges are deteriorating, requiring multiple repairs. They must be permanently replaced for the long term safety of the traveling public. Other pavement improvements, such as a new pavement, will greatly improve the driving surface.

“The replacement of the I-76 bridges on York Street offers the opportunity to improve the quality of life for those who regularly travel to the project area for work, school and other daily needs,” said Jessica Myklebust, CDOT Region 1 Director of Transportation. “This project also benefits the freight community that relies on the infrastructure to make deliveries of many goods and services by creating a safer merge with I-76. Investment in this project will have lasting benefits for the local and regional economy.

How will the project be delivered?

  • Replacement of the I-76 bridge on York Street: There are currently two I-76 bridges over York Street, one going east and the other going west. These aging bridges are narrow with a gap in between. The project will replace these two separate bridges with a stronger combined structure. The new bridge will remain two lanes in each direction with wider shoulders, making the structure safer and stronger. A barrier will be installed in the median to reduce glare from traffic lights at night.
  • Westbound I-76 Auxiliary Lane: An auxiliary lane will be added on I-76 westbound from 74th Avenue to the I-270 exit ramp. This auxiliary lane will improve safety for traffic entering and exiting westbound I-76 from 74th Avenue and the I-270 exit ramp, solving bottleneck issues.
  • Reconstruction of the 74th Avenue ramps: The driving surface will be rebuilt on the 74th Avenue ramps connecting to I-76. This work, in conjunction with the auxiliary lane on westbound I-76, will improve traffic safety as it merges into and out of westbound I-76 from 74th Avenue and at the exit ramp from I-270, while alleviating bottleneck issues.
  • Pavement reconstruction: Most of the roadway will be rebuilt on I-76 from York to Dahlia streets.

Traffic impacts

Motorists should watch for traffic changes on the I-76 bridge over York Street as crews begin work on the bridge. Two lanes of traffic will be maintained in each direction during daytime and peak hours, but the traffic lanes will be narrow. Work takes place behind concrete barriers on weekdays. Single lane closures in either direction may occur from 9 p.m. to 5 a.m. Sunday through Thursday. It is extremely important that motorists pay attention and obey the speed limit in this tight construction zone for the safety of crews and motorists.

Later this fall, there will be short-term complete overnight closures of I-76 (eastbound or westbound, but not both) from I-270 to 88th Avenue to install overhead signs and install beams or deck supports. It would be three one night closings. During these closures, York Street will be closed from 66th Avenue to East 74th Avenue to allow for the erection of beams, the demolition of bridges and the pouring of the deck.

There will be long-term ramp closures from 74th Avenue to I-76 starting in late summer, with detours in place.

Stay informed

Know before you go

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

Remember: slow for the cone area

The following tips are intended to help you stay safe when traveling through maintenance and construction work areas.

  • Do not accelerate in work zones. Obey the posted speed limits.
  • Stay alert! Expect the unexpected.
  • Watch the workers. Drive with caution.
  • Do not change lanes unnecessarily.
  • Avoid using mobile devices such as phones while driving through work areas.
  • Turn on the headlights so workers and other drivers can see you.
  • Be especially vigilant at night when driving through work areas.
  • Expect delays, especially during peak hours.
  • Leave enough space between you and the car in front of you.
  • Anticipate lane changes and merge when prompted.
  • Be patient!

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