Glenwood Canyon's $101 million Phase 8 project moves to 2028 so it does not collide with the Aspen airport closure

The next big rebuild of Interstate 70 through Glenwood Canyon will wait a year, on purpose. In a press release dated Oct. 15, 2026, the Colorado Department of Transportation said the Colorado Transportation Commission has approved funding from the Transportation Commission Program Reserve to address inflation and cost escalation tied to moving the I-70 Glenwood Canyon Phase 8 Project from 2027 to 2028. CDOT leadership recommended delaying the project by one full construction season, the release said, after extensive regional coordination.

The reason is sequencing, not funding trouble alone. The Aspen/Pitkin County Airport Modernization Project requires a full closure of that airport from April 4 to Nov. 19, 2027, according to CDOT and to Pitkin County's own project materials. Pitkin County confirmed the same closure window in its July 24, 2026 announcement of construction teams for the project: the airport is scheduled to close Sunday, April 4, 2027 at 11:00 p.m. through Friday, Nov. 19, 2027 at 7:00 p.m., while crews reconstruct and shift the runway and begin work on a new terminal and fixed base operator facility. Overlapping major construction in the canyon with that closure, CDOT concluded, would compound disruption on the corridor that airport travelers would need most.

strategic timing is everything

Shoshana Lew, Executive Director, Colorado Department of Transportation, in CDOT release, Oct. 15, 2026

Why Eagle County backed the delay

Eagle County is directly in the path of the rerouting. CDOT said airport travel is expected to shift to Eagle County Regional Airport, or prompt travelers to drive from Denver International Airport to the Roaring Fork Valley, which makes keeping Glenwood Canyon moving during the closure critical for the regional and statewide economy. Boards of County Commissioners in both Pitkin and Eagle counties submitted letters of support and appreciation for the change during the Transportation Commission's public comment period, CDOT said. For valley residents, the practical effect is a quieter canyon construction calendar in 2027, the same year the Aspen closure pushes more arrivals through Gypsum and onto I-70.

What Phase 8 will do when it arrives

Phase 8 is the latest in a series of projects to repair aging infrastructure in the canyon, CDOT said. It covers 16.5 miles in Garfield County, between Mile Points 115.5 and 132.0, and represents a $101.16 million investment, including $1.46 million for design and $99.7 million for construction. The work list includes a new concrete surface along the highway lanes and inside both the No Name and Hanging Lake Tunnels, updated pavement markings, permanent traffic crossovers and new guardrails, plus upgrades to bridge decks, supporting walls and other structures throughout the canyon. Weather stations at three canyon locations will be upgraded, and crews will clear remaining debris from the 2021 Grizzly Creek Fire and later floods out of the Colorado River and build protective barriers above the Hanging Lake Tunnels, including debris fences and drainage channels, to reduce the chance of mudslides blocking the highway.

CDOT said it will continue to work with Pitkin County, local municipalities, emergency responders and regional transit agencies through the airport closure and beyond, on traffic management, public communication and keeping disruption down for residents, commuters and visitors across the Western Slope. The department's Glenwood Canyon page remains the official source for current canyon travel conditions, and drivers should check COtrip for live closures and restrictions rather than relying on this summary. What changed this week is the calendar, not the canyon: the rebuild Eagle County drivers have been expecting in 2027 is now a 2028 project, deliberately held until the region's airport detour is over.