Drivers heading west from metro Denver into the mountains on Interstate 70 on Monday and Tuesday face overnight closures, and 20-minute stops through Thursday at the base of Floyd Hill, the latest traffic disruptions for bridge building as part of the Colorado Department of Transportation’s $800 million reconstruction of I-70 through Clear Creek Canyon.

The nighttime closures this week, scheduled from 9 p.m. until 5 a.m., are planned around the I-70/U.S. 6 interchange at exit 244 and include on- and off-ramps.

Drivers also should expect to wait at 20-minute stops multiple times per day from 9 a.m. to 3 p.m. on I-70 starting Monday, and continuing through Thursday, according to a CDOT notice.

But officials said there would be no planned traffic disruptions during the holidays from Dec. 20 to Jan. 5.

CDOT contractors will be blasting rock in the canyon above eastbound and westbound I-70 between the Veterans Memorial Tunnels and the Homestead Road interchange near Idaho Springs. And drivers may face intermittent traffic stops along the Central City Parkway, County Road 314, U.S. 6, and U.S. 40, CDOT officials said.

CDOT contractors are building a temporary framework to support their upcoming construction of a concrete bridge on I-70. When it’s done, the bridge will carry westbound drivers through a new route that CDOT officials say will be safer and improve traffic flows through the canyon, which long has loomed as a bottleneck.

The rebuilt highway, with an added westbound express toll lane, eventually will carry drivers through a widened canyon on viaducts 115 feet above Clear Creek. This safer route, designed to improve visibility for drivers, is expected to allow speeds of 55 miles per hour in areas now marked 45 mph.

Depending on the weather this week, disruptive construction work may shift to Wednesday and Thursday, CDOT officials said.

The I-70 Floyd Hill Project involves about eight miles of I-70 in the mountainous area between Evergreen and the eastern edge of Idaho Springs. CDOT officials have promised that, as part of the project, they’ll improve the Clear Creek Greenway trail and ensure safer routes for wildlife.

Construction began in July 2023. The project is expected to conclude in 2029.

Drivers learn more by calling CDOT at 720-994-2368 or by texting floydhill to 21000 and signing up for text alerts. CDOT officials also said information about weather, road conditions, and travel impacts is available at COtrip.org.