According to Minnesota Sports Facilities Authority chairwoman Michele Kelm-Helgen, adding bird-safe glass to the new football stadium could delay construction by six months and cost as much as $60 million extra. Currently the stadium plans to use clear glass, which some complain would pose a threat to birds. The stadium's glass maker has estimated changing to etched or fritted glass could take as long as 23 extra weeks.
Kelm-Helgren said they will test a number of 3M film coatings which could make the glass safer. As for now, Kelm-Helgren says stadium construction will proceed as planned.