A historic Denver building that was initially going to be saved is being demolished as part of the redevelopment of East 9th Avenue and Colorado Boulevard.

The Research Bridge at the University of Colorado Health Sciences Center was designed by a Chicago architecture firm in 1964. Annie Levinsky, the executive director of Historic Denver, said it’s known for its clean lines and example of mid-century modern architecture.

Continuum Partners and CIM Group, the developers for the project, had discussed converting the bridge into a hotel. This will no longer be the case, and the structure over 9th Avenue is now coming down.

“We’re watching, sadly, the demolition of a great architectural building in Denver,” said architect Tim Pickard.

The building has previously been a laboratory and research building for the hospital, which has been moved to the Anschutz campus in Aurora due to its growth.

“We’re seeing a lot of change in this city, and buildings like this help anchor us,” Levinsky said.

Many buildings that previously existed on the campus are also gone as part of the mixed-use development, which will include apartments, condos, restaurants, shops and even a movie theater.

A parking structure and dormitory for the hospital’s nurses will not be demolished, Levinsky said.