The Interstate 70 was closed in both directions from Dotsero to Glenwood Springs.
The rocks about the size of small cars, and the hill is extremely unstable -- making clean up difficult. The slide caused major damage to the roadway, retaining wall, bridge/guardrail.
The Colorado Department of Transportation shared this photo of a semi-trailer that was struck in the rock slide.
No injuries were reported and as of Tuesday evening, the road was still not open.
According to The Colorado Department of Transportation the average daily traffic through the canyon is about 300 vehicles per hour.
The Colorado River carved the scenic canyon, which is popular with anglers and rafters. The chasm is so narrow that one 12-mile section of the interstate runs through three tunnels and across 40 viaducts and bridges. It took 12 years to complete, according to Fox News.
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