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Public Works

C-470 multi-modal trail grade separation at Yosemite



Estimated Total Project Cost = $5.5 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 Jan. 27, 2023

Project Hotline: 720-386-3803
Project Email:  [email protected]
Sign up to receive project information including lane closures by clicking here and choosing Road Work / Cone Zone information from the subscriber list.

Trail Closures and Detour Map 

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 (click on detour map above for more info). Motorists can expect intermittent single-lane traffic with flaggers assisting motorists through the work zone.

January 30 – February 13, 2023:

The County’s contractor (Zak Dirt) is on the second phase of construction of the mechanically reinforced retaining walls which are located on both east and west sides of Yosemite Street and involves building the cast-in-place concrete form liner and coping elements as well as hand railing. Concrete trail elements are being constructed on top of the retaining wall-supported structures.

On westbound C-470 from Yosemite Street, a portion of the left lane of the ramp may 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 and one of the left turn lanes, just before Park Meadows Center Drive, will have intermittent closures during these days/times.

Project work will continue through February 2023.


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 $5.5 million. The County was selected to receive $2 million in federal funds through the DRCOG project selection process.

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Project Photos