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Public Works

County Line Road Widening and Reconstruction (University to Broadway)

Under Construction

Contractor

JHL Constructors
[email protected] (720) 795-9622 x2523

Partners

  • City of Centennial
  • City of Littleton
  • DRCOG

Project Update

Updated September 2025:

Construction on County Line Road began in September 2025. Crews will establish the work zone boundaries and complete construction activities on the shoulders of County Line Road. If there are traffic impacts, they will be minimal. Construction hours are Monday through Friday, 7 a.m. to 7 p.m. Saturday work is possible if approved by the Douglas County Engineer.

Later this year, motorists should anticipate a full closure of County Line Road from Clarkson Street to the U-Haul business access area. The closure will last approximately 100 days giving crews time to import dirt for construction at Lee Gulch. Business access will be maintained via County Line Road. Residential access to Clarkson Street will be maintained via Dry Creek Road. More information regarding this closure will be available later this year – stay tuned to our communications. 

Total Project Duration: About 24 months.

Description

Since 2019, Douglas County has worked with partners to advance the final design, acquire right-of-way and prepare utility relocation design for a major water line located within the project area. Douglas County is partnering with the Denver Regional Council of Governments, the City of Littleton and the City of Centennial to fund the project. The total construction cost is estimated to be approximately $30 million for budget planning purposes which includes contingency funds, construction costs and consultant engineering costs to provide project management, inspections, and material testing for the project.

This project will include an additional travel lane in each direction, a new traffic signal at the Clarkson Street/County Line Road intersection, a mill and overlay for the portion of the road within the City of Littleton located between Phillips Avenue and Broadway, as well as adding sidewalks. Construction started in September 2025.

Project Fact Sheet

Project Photos