Construction crews will remove a potentially unstable rock ledge from Boulder Canyon, causing a 24-hour closure on Colo. 119 from 8 a.m. Oct. 19 through 8 a.m. Sunday, according to the Colorado Department of Transportation.

The removal work will take place between mile markers 39 to 40. The 3,000-cubic-yard blast is necessary to ensure the safety of motorists who use Boulder Canyon, also known as Colo.119, and will require more cleanup than the regularly scheduled daily blasts, according to a CDOT news release.

Motorists are advised to use alternate routes while Boulder Canyon is closed from Saturday to Sunday.

In light of the start of the school year and bus operations, CDOT officials said the Colo. 119 team has scheduled the extended full closure over a weekend to minimize impacts as much as possible.

During the closure, CDOT officials urge travelers to avoid the Boulder Canyon route, if possible. Local detours are available. From Boulder, a northern alternate route can be taken via Colo. 7, U.S. 36 and Colo. 72. A southern alternate route is available via Colo. 93 and Colo. 72. Motorists taking the southern alternate route should be aware of a project on Colo. 72 in Coal Creek Canyon, between Plainview Road mile point 12.3 and Pinecliffe mile point 24.6.  Motorists should expect lane shifts and short delays at this work zone, the release stated.

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