Douglas County commissioners received an update Tuesday on a number of road projects happening in the area to address growth.
Of the millions of dollars in construction planned, this year’s biggest project is widening Colorado Highway 85 from four lanes to six lanes from Highlands Ranch Parkway to C-470, which is expected to total around $105 million.
The cost of the project will be heavily shouldered by Douglas County, though the Denver Regional Council of Governments is contributing $26.2 million and the Colorado Department of Transportation is paying $7.6 million.
Construction has been delayed by the need to relocate a City of Englewood water line. Douglas County Project Manager Art Griffith said Englewood officials are negotiating a permit with the Army Corps of Engineers for moving the water line.
“It is essentially the last thing that prevents us from bidding the project,” Griffith said, adding he still hopes to bid the project in May.
Another project that will consist of multiple phases and upgrades is the work identified on Lincoln Avenue from Park Meadows Drive to Oswego Street, known as Advancing Lincoln Avenue.
Griffith said project staff are currently evaluating six different options for the Havana Street intersection and 12 alternatives for the Interstate 25 interchange.
“There are 72 options on the table, so we’re going through the screenings and once we (finish screening), we’ll do detailed traffic analysis on the top four and move forward with one preferred alternative,” Griffith said.
Pre-construction work for Advancing Lincoln Avenue is slated to be finished this December in preparation for final designs, which are planned for 2023 or 2024.
Nearby in Lone Tree, the city and county are also partnering on a future Lone Tree mobility hub off I-25 near Sky Ridge. Griffith said the project aims to improve existing Bustang operations in the area.
Similar to the Lincoln Avenue work, project managers are in the process of choosing the best of three location options for the mobility hub, which will need bus stations on both sides of I-25.
For the $20 million hub, CDOT is putting up half of the funds, while the county and city hope to contribute $1 million each, with the remaining money planned to come from the Denver Regional Council of Governments.
“There’s a similar mobility hub concept at US 36 and McCaslin,” Griffith said. “So essentially you have parking and direct connections to the buses.”
In Parker, the town and county are working on extending Dransfeldt Road from the Twenty Mile Road intersection to connect with Motsenbocker Road, north of Salisbury Park. Final designs for the $18 million construction are expected this month with construction following next year.
“It helps provide a more resilient transportation network with less reliance on (Colorado Highway 83),” Griffith said.
Highway 83 will see its own updates this summer, with just under $700,000 to be spent improving signage, striping and traffic signal modifications. Another $50 million in intersection improvements have been identified, but not all of the funding has been dedicated.
A roundabout is also in progress at the intersection of Highway 83 and Palmer Divide Road.
Douglas Forum Transportation plans to recommend that these projects, as well as the Crystal Valley Interchange, further widening on Highway 85 and a study of a portion of Colorado Highway 86, take priority in future CDOT planning at a meeting on April 6.