The crash, which occurred on I-70 at Georgetown, prompted authorities to close the highway as emergency crews responded and worked to clear the scene. Investigators have determined that the semi lost control prior to the multi-vehicle pileup, though further details about the cause and the sequence of events were not immediately available.

The closure disrupted travel through the I-70 mountain corridor, a critical route for commuters, freight haulers and tourists heading to and from the high country. The corridor is known for steep grades, sharp curves and rapidly changing weather conditions that can make driving hazardous, particularly for large commercial vehicles.

Details on injuries and the exact number of people involved were not immediately released. The investigation into what caused the semi to lose control is ongoing.

The crash adds to a long record of serious incidents on the I-70 mountain stretch, where state and local officials have faced pressure to improve safety through better signage, speed management and truck enforcement. For mountain communities like Georgetown, highway closures can also strain local resources and disrupt daily life for residents and businesses that depend on the corridor.

Authorities have not said how long the closure would last or whether additional safety measures would follow. Drivers were advised to expect delays and seek alternate routes while the investigation and cleanup continued.