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Public Works

C-470 multi-modal trail grade separation at Acres Green Drive

Under Construction


Estimated Project Cost = $4 million

Project Manager

Ben Pierce
[email protected] 303-660-7490


  • City of Lone Tree

Project Update

Updated March 22, 2023 – Construction started in December 2022 and is anticipated to be completed by December 2023.  



The County is partnering with the City of Lone Tree and CDOT to build a pedestrian/bicycle bridge that will carry the C-470 multi-modal trail over Acres Green Drive. The project is being advanced to improve safety and mobility and reduce congestion and traffic delays on Acres Green Drive. The final design is currently underway, with no significant utility relocations or ROW acquisition anticipated.

The total project is estimated to cost $4 million to construct. The City of Lone Tree was successful in being selected to receive $2 million for construction in federal funds through the DRCOG project selection process, and the remaining construction costs are to be shared by Douglas County ($1 million) and the City of Lone Tree ($1million). Additionally, the County agreed to contribute $225,000 to Lone Tree to advance a portion (50%) of the final design costs, which got underway in 2021 and was completed in the fall of 2022.

More information may be found at cityoflonetree.com/projects/c-470-trail-bridge-over-acres-green-project


Construction started in December 2022 and is anticipated to be completed by December 2023. 

This is a City of Lone Tree Project – for further information visit their website.

Project Photos