A section of road between Cortez and Telluride in southwest Colorado was obliterated by two massive boulders, authorities say. The Colorado Department of Transportation says a slide "consisting of dirt, rock, and two huge boulders" hit Colorado 145 on Friday, causing no injuries but leaving a trench 8 feet deep, the BBC reports. The heavier of the two boulders was the size of a building and weighed around 2.5 million pounds, authorities say. The transportation department says the boulder was embedded in the highway, leaving it completely impassable, reports CNN. In a Facebook post late Sunday, the department said the larger rock had been blasted into rubble, while the second one may be left where it sits on the eastern side of the highway. (More Colorado stories.)