Douglas County secures nearly $6 million for infrastructure projects
Castle Pines tied $1.5 million to the I-25 and Happy Canyon Road interchange, but the federal money still needs final appropriations action.
$1.5 million for the I-25 and Happy Canyon Road interchange moved forward with nearly $6 million for four infrastructure projects in Douglas County. The interchange work would support a long-planned redesign that includes a new bridge north of the existing structure, demolition of the current bridge, rebuilt I-25 ramps and signal and intersection improvements.
Douglas County began studying the Happy Canyon Road and I-25 corridor in 2015, using 2030 and 2040 traffic projections, alternatives analysis and conceptual design plans to map out long-term changes. The preferred option is a diverging diamond interchange, being evaluated with Douglas County, the Colorado Department of Transportation and the Federal Highway Administration because it is expected to move traffic more efficiently than a signalized diamond and cut delay at the ramp termini. A pre-construction open house on June 4 gave residents a chance to review the design, ask questions and hear about traffic impacts.
Construction on the Happy Canyon project was anticipated to start in July 2026 and finish in mid-2028. A roundabout at Happy Canyon Road and Lagae Road was completed in 2024 as early work for the future interchange, and the next phase of construction had been expected to begin in late 2026 or 2027 depending on funding from Douglas County and other partners.
The county’s share includes $2 million for the Quebec Street and C-470 interchange, a project Commissioner Kevin Van Winkle said was a “major victory for Highlands Ranch residents and anyone who uses the corridor daily.” Earlier Colorado Department of Transportation work around that bridge included a 2007 maintenance agreement that referenced widening the Quebec Street bridge and adding an adjacent pedestrian bridge.
Rep. Lauren Boebert helped secure more than $16 million in community project funding requests for Colorado’s Fourth Congressional District as part of FY27 appropriations bills advanced by the House Appropriations Committee. Sixteen requests from the district moved through the committee, and the committee’s FY27 community project funding page required members to post each request publicly online, with consolidated tables still forthcoming.
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