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Public Works

C-470 multi-modal trail grade separation at Yosemite



Estimated Total Project Cost = $7 Million

Project Manager

Neil Sarno
 [email protected]



Zak Dirt


  • City of Lone Tree
  • Colorado Department of Transportation
  • Park Meadows Metro District

Project Update

Traffic Impacts – updated October 3, 2022

Trail Closures and Detour Map (updated September 1, 2022)

October 3 – 10, 2022: The County’s contractor (Zak Dirt) continues to advance construction of the mechanically reinforced retaining walls which are located on both east and west sides of Yosemite Street. The second phase of the retaining wall construction is underway, which involves building the cast-in-place concrete form liner elements. Additionally, Zak Dirt has made significant progress on the bridge abutments, which are complete, except for the coating.

Other traffic issues during October 2022: On westbound C-470 from Yosemite Street, a portion of the left lane of the ramp will be closed daily (Monday – Thursday) from 8:30 a.m. to 3:30 p.m., and on Fridays from 8:30 a.m. to 2 p.m. Additionally, the right lane of northbound Yosemite Street, just before Park Meadows Center Drive, will have intermittent closures during these days/times.

  • During construction, the existing trail access will be closed. Pedestrians and cyclists will be detoured via Yosemite Street, Parkway Drive, and ultimately rejoin the C-470 Trail from both east and west directions (see detour map above).
  • Motorists can expect intermittent single-lane traffic with flaggers assisting motorists through the work zone.

This project will continue through December 2022.

Fun Facts – Update on this Project! (9/1/22)
(Updated September 1, 2022)

Updated Rendering of Project – see below in Photos


A new Douglas County trail improvement project began on Dec. 13, 2021. Designed to improve safety along the trail, the project includes the installation of a pedestrian bridge with the extension of a multi-use trail/sidewalk on the north side of S. Yosemite Street and the C-470 on-ramp.

The current trail requires pedestrians and cyclists to cross at the busy intersection of Yosemite and C-470. With the construction of the new overpass, the trail will be rerouted over the intersection, creating a safer, more convenient connection for pedestrians and cyclists. Additionally, the new pedestrian bridge will improve mobility by reducing congestion and traffic delays on Yosemite Street related to C-470 trail users interfacing with motorists.

The total project is estimated at $7 million. The County was selected to receive $2 million in federal funds through the DRCOG project selection process, and the remaining project costs are Douglas County’s responsibility. The Park Meadows Metro District has agreed to contribute $100,000 toward the construction costs.

Download a Fact Sheet to share


See “Project Update” section above OR Contact the Project (below)

Project Hotline: 720-386-3803
Project Email:  [email protected]

Expect delays. The project is expected to continue through December 2022.

Sign up to receive project information including lane closures by clicking here and choosing Road Work / Cone Zone information from the subscriber list.

Project Manager
Neil Sarno
[email protected]

Project Photos