I-70 Glenwood Canyon Joint Work Still Holds a Lane

The Colorado Department of Transportation is still replacing bridge joints on I-70 in Glenwood Canyon, a $7.5 million job scheduled through October. A Sept. 22 Glenwood Springs construction board still listed weekday lane work from mile point 116 in Glenwood Springs to mile point 133 in Dotsero, the 17-mile stretch CDOT assigned to contractor KSK LLC.

The original notice, posted in June 2025, framed a two-season repair with a winter pause and a fall 2026 finish. That finish window is now the current season, and the canyon is carrying more than cones. Hanging Lake’s rebuilt trail opened on June 18, 2026, at Exit 125, inside the same work limits.

Crews Are Still in Glenwood Canyon This Fall

CDOT’s project sheet still prices the $7.5 million joint replacement on I-70 and still dates the contract from May 2025 to October 2026. Field work started in mid-July 2025. Crews are on the road 7 a.m. to 7 p.m., Monday through Friday, on structures near Exit 119 at No Name, Exit 122 at Grizzly Creek Rest Area, Exit 123 at the Shoshone Power Plant, Exit 125 at the Hanging Lake Trailhead, and Exit 129 at Bair Ranch Rest Area, in Garfield and Eagle Counties.

On March 11, 2026, CDOT said the second season would restart on March 16 and would focus on eight remaining bridge joint structures and guardrail work from Glenwood Springs to Dotsero.

#CDOT #News: I-70 Glenwood Canyon Bridge Joints Improvement project restarts March 16. Crews will focus on eight remaining bridge joint structures and guardrail improvements from Glenwood Springs to Dotsero.

📰https://t.co/PcQTxVv75H#KnowBeforeYouGo #SlowfortheConeZone pic.twitter.com/WW4SD7xy0I

— Colorado Department of Transportation (CDOT) (@ColoradoDOT) March 11, 2026

THE JOB ON PAPER

• The cost: CDOT budgets $7.5 million for 23 bridge joints and guardrail repairs.
• The limits: Work runs from mile point 116 to 133, a 17-mile stretch CDOT describes as Glenwood Springs to Dotsero.
• The clock: Day shifts are 7 a.m. to 7 p.m., Monday through Friday, with a printed finish around fall 2026.
• The phone: The project line is 970-896-6953, with email at I70GlenwoodCanyon@gmail.com.

The same Sept. 22 city notice said the Glenwood Canyon Recreation Path from Glenwood Springs to Dotsero is open, and that CDOT is also updating rest areas at Bair Ranch, Grizzly Creek, and No Name. The joint job is not the only orange in the gorge, which is why a weekday trip through the canyon still needs a time buffer even when the bike path is clear.

Why These 23 Joints Matter on a Viaduct Highway

Bridge joints are the gaps that let a deck grow and shrink as temperatures swing and trucks roll over it. CDOT says the hardware connects the roadway to elevated bridges, and that replacing it gives motorists a smoother surface. In Glenwood Canyon that is not a small detail, because so much of I-70 here is not sitting on dirt. It is sitting on structure.

Leave a joint worn and the ride slams, water gets into the gap, and the hits travel into the girders. CDOT’s 2025 season finished five eastbound and westbound joints near Bair Ranch Rest Area at Exit 129, plus work on a larger joint structure near the Shoshone Power Plant at Exit 123. When the agency paused for winter on Nov. 26, 2025, it listed 18 joints still to go, along with guardrail and asphalt paving from mile point 116 to 133.

The March restart narrowed the public message to eight remaining bridge joint structures, including work near Hanging Lake and Shoshone. CDOT did not treat joints and structures as the same unit, and the article does not either. The constant across every notice is 23 joints in the full job.

The 1992 Road That Finished the Interstate

The canyon highway these joints serve was the last hard piece of I-70. CDOT’s Hanging Lake Tunnel page says construction began in 1980 and concluded in 1992, a $490 million project that rebuilt 12 miles of I-70 through Glenwood Canyon. The Hanging Lake Tunnel is a pair of 4,000-foot bores that also houses an operations center, with a live camera network CDOT puts at more than 120 cameras watching the canyon.

Federal highway records describe the Glenwood Canyon project as one of the hardest interstate settings in the country, a narrow gorge that produced a 30-year fight over how to put a freeway through it. Designers used forty-plus bridges and viaducts and a tunnel to keep the road off the river and off the walls. Crash rates dropped 40 percent in the years after the new alignment opened, according to those same records.

1992 BUILD VS. THE JOINT JOB

Thirty-four years of freeze, thaw, and freight will use up the small steel at the ends of those decks. The 2025-26 job is tiny next to the original bill, and it is the part that fails first when a road is a string of bridges.

Five Years After Mud Covered I-70

The joints would have needed work anyway. The canyon made the wait louder. The Middle Colorado Watershed Council records the Grizzly Creek Fire as 32,631 acres over 131 days, beginning Aug. 10, 2020. Burned slopes then loaded every storm. On Aug. 1, 2021, a major debris flow buried I-70, and CDOT later said the highway was closed for nearly 20 days.

U.S. Geological Survey staff have described how travelers in Glenwood Canyon were evacuated before mud buried the highway during the 2021 monsoon bursts. On Aug. 1, 2026, CDOT marked five years since that burial and called it the most destructive event in the I-70 Mountain Corridor’s history, rolling out a six-part series, From Ashes to Asphalt: Glenwood Canyon Recovery.

The joint crews were already back in the canyon when that anniversary posted. The memorial and the maintenance ran in the same season, which is the pattern this stretch of I-70 now lives with: a 1992 showpiece that still has to be taken apart in pieces after fire, flood, and ordinary wear.

FROM OPENING DAY TO THE CONE ZONE

1. 1992: I-70 through Glenwood Canyon opens after a $490 million, 12-year build, with twin 4,000-foot tunnels at Hanging Lake.
2. August 10, 2020: The Grizzly Creek Fire starts and burns 32,631 acres over 131 days.
3. August 1, 2021: Debris buries I-70; CDOT later puts the closure at nearly 20 days.
4. Mid-July 2025: KSK LLC starts replacing 23 bridge joints and repairing guardrail.
5. November 26, 2025: Winter shutdown; five Bair Ranch joints are done and 18 joints remain on CDOT’s list.
6. March 16, 2026: The second season starts, aimed at eight remaining structures, including Hanging Lake and Shoshone.
7. June 18, 2026: The rebuilt Hanging Lake Trail opens at Exit 125.
8. September 22, 2026: Glenwood Springs still lists the joint project on its construction board.

Even after the 2021 mess was cleared, the canyon kept throwing extra closures on top of planned work. On Sept. 15, 2026, CDOT posted intermittent westbound stops at Dotsero for emergency door work at the Hanging Lake Tunnel Complex, a reminder that the 1992 tunnels have their own punch list beside the joints.

Hanging Lake Reopened Into a Work Zone

Hanging Lake is the hidden bill-payer in this construction season. The trailhead is Exit 125, one of the five named work areas on the joint job. After the 2020 fire spared the lake and the 2021 floods wrecked the path, a $4.7 million reconstruction that launched in spring 2024 aimed at a June 18, 2026, reopening. That date held.

Before 2020, Hanging Lake drew more than 72,000 visitors a year and generated $4.6 million a year for the Glenwood Springs-area economy. Glenwood Springs Mayor Marco Dehm has been blunt about what the closure did to town.

The trail itself being closed was devastating. We felt the impacts of people not coming because of Hanging Lake, and that was felt throughout the community.

Marco Dehm, Mayor of Glenwood Springs, on the U.S. Forest Service Hanging Lake feature

The Hanging Lake trail restoration in White River National Forest put in 1,289 stone steps, seven new bridges, and a rebuilt 1.5-mile route that climbs more than 1,000 feet. More than 6,000 people who had held canceled reservations donated those fees instead of taking refunds. Glenwood Springs officials told the National Forest Foundation the new alignment cut average hike time by 30 minutes.

Hikers can buy permits again, and the trail is open. Getting to Exit 125 on a weekday still means sharing I-70 with a joint crew that CDOT placed at that same off-ramp. The trail’s five-year rebuild and the highway’s two-season joint job landed on top of each other, which is a sour joke only if you skip the geology. Fire took the path. Water took the bridges on the path. The same years of weather were working on the expansion joints over the river.

One Lane at 35 mph Through the Gorge

CDOT’s traffic plan for the job is simple and ugly in a canyon with no parallel freeway. Lane closures may run up to two and a half miles in either direction. While joints come out, I-70 drops to one lane in the work zone and the posted speed is 35 mph.

The March 16, 2026, restart got specific. Westbound I-70 went to one lane from near Bair Ranch Rest Area at mile 128.5 to before Hanging Lake Rest Area at mile 126.5, for three joints. Eastbound I-70 went to one lane from near Shoshone at mile 123 to Hanging Lake at Exit 125, for three more. Concrete barriers went in to hold that single-lane shape.

RULES POSTED FOR THE 2026 SEASON

• Hours: Work is 7 a.m. to 7 p.m., Monday through Friday, so weekend and night traffic is the relief valve.
• Speed: The work zone is posted at 35 mph while the lane drop is in place.
• Length: A single closure can run up to two and a half miles in eastbound or westbound lanes.
• Width: A May 2026 Glenwood Springs traffic notice posted an 11-foot limit on commercial and recreational vehicles for the duration of the project.

There is no cheap detour that keeps you on an interstate. Trucks that miss a width limit, hikers aiming at Exit 125, and through traffic bound for Denver or Utah all stack in the same remaining lane. That is the real cost of a $7.5 million joint job in this gorge, and it is why CDOT Executive Director Shoshana Lew kept talking about commerce when she asked for patience.

October Is the Printed Finish Line

When the first season stopped on Nov. 26, 2025, CDOT put both directions back to two lanes, restored normal widths for plows, and paved the decks where joints had already been swapped. Lew used that pause to talk about money moving through the canyon, not about steel in a gap.

In March she came back with a finish-line line that the project page still has to make good in October.

Crews are returning after the winter shutdown to complete this vital bridge work and ensure I-70 remains a safe, reliable link for all of Colorado. By continuing these improvements, we are protecting a key economic artery that supports businesses and keeps our mountain communities connected. We appreciate the public’s patience as we cross the finish line to secure the long-term health of the I-70 Mountain Corridor.

Shoshana Lew, CDOT Executive Director, March 16, 2026 restart notice

The printed dates have not slipped in public. The project page still says October 2026. The June 2025 kickoff still said fall 2026. The Sept. 22 Glenwood Springs board still had the job on the list, with the same 7 a.m. to 7 p.m. weekday window. Hanging Lake is selling hikes. The recreation path is open. The joints, the small hardware on a $490 million road, are what this canyon highway uses up, and they were still in the work plan as that October date sat on the sheet.