A blackout curtain system at U.S. Bank Stadium needs to block light from coming through the massive glass walls and translucent roof of the 1.7 million-square-foot stadium. The system is a requirement for the venue to host the 2019 NCAA Final Four men’s basketball tournament. (File photo: Bill Klotz)

Five submit bids for Vikings stadium’s blackout curtains

The curtains are a requirement for the venue to host the 2019 NCAA Final Four tournament.