The roof of the Metrodome will be deflated for the final time next month. The contractor building the new Minnesota Vikings stadium, Mortenson Construction announced on Friday that it will cut the Metrodome’s power on January 18th. The first step after that is to deflate the Teflon and fiberglass roof. The deflation of the Metrodome is expected to only take about 30 minutes. The roof fabric will then be cut into small pieces and possibly recycled. Preliminary work on the new Vikings stadium has already started around the Metrodome. The team will play two seasons at the University of Minnesota’s stadium. A $400-million business, retail, residential and parkland development around the new stadium got the go-ahead on Friday as well.