DENVER (KDVR) — A pair of Black Hawk helicopters landed in downtown Denver Tuesday as part of a survey of temporary COVID-19 medical facilities.

Lt. Gen. Todd Semonite, Chief of Engineers and Commanding General of the U.S. Army Corps of Engineers, along with other officials, was flown in to visit the Colorado Convention Center. The helicopters landed outside the Denver Performing Arts Complex.

Last week, the Army Corps of Engineers began building a 2,200-bed “Tier 3 Medical Shelter” at the convention center. Plans call for it to be used, if needed, for patients recovering from COVID-19 who need less medical attention, to free up Intensive Care Unit beds for critical patients.

Video: First look inside the convention center in progress

Semonite also toured a similar facility being constructed at the Ranch at the Larimer County Fairgrounds and Events Complex in Loveland.

At a news conference Friday, Gov. Jared Polis said he hopes the state won’t need to use the convention center site, but also said it is possible dozens or hundreds of patients may need to be in the facility.