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Public Works

US 85 widening from four to six lanes from Highlands Ranch Parkway to Dad Clark Gulch (located about 1,200-feet north of County Line Road)



Estimated Total Project Cost = Over $100 Million

Project Manager

Art Griffith
[email protected]



Updated April 2022

This project involves widening and reconstructing approximately 2.5 miles of US 85 between Highlands Ranch Parkway and Dad Clark Gulch (which is located approximately 1,200-feet north of County Line Road). The invitation to qualified contractors to bid on this design-bid-build contract is tentatively anticipated to occur on May 26, 2022, with plans available on May 31, 2022. If this deadline is met, then the award of a construction contract will allow the contractor selected to order material before beginning construction in August 2022. Once the notice to proceed is given, construction is estimated to take 30 months to substantially complete. The project team is currently coordinating with several utility companies to resolve hundreds of existing utility conflicts prior to roadway reconstruction. Utility relocations are currently underway and will continue into the first quarter of 2022. Right-of-Way acquisition is substantially complete, and preparation of the final bid documents is almost ready for final approvals from CDOT which will allow the County to advertise the project.

The total project is estimated to cost over $100 million. The project was selected to receive approximately $26.2 million in federal funding via the Denver Regional Council of Governments (DRCOG) through the Transportation Improvement Program (TIP) project selection process. Additionally, CDOT will be contributing $7.6 million while the remainder of the project is Douglas County’s responsibility (approximately $68 million needs to be allocated for environmental clearances, preliminary and final design, right-of-way acquisition, and utility relocations, and for construction and construction engineering services). A portion of Douglas County’s contribution is funded by developers in the Chatfield Basin, which increases as development occurs.

A video of how a Continuous Flow Intersection (CFI) operates and a list of project improvements can be viewed by visiting


Schedule not available yet.

Project Manager
Art Griffith, P.E.
[email protected]

Project Photos