December 20, 1979 – With the official groundbreaking taking place, construction began on the Metrodome and it was built by the state of Minnesota at a cost of approximately $68 million. The Metrodome becomes baseballs’ third domed facility when it opened in 1982.
The Minnesota Twins moved out of the Metrodome after the 2009 season and moved across town to their new digs at Target Field. The last season that the NFL Minnesota Vikings played there was in 2013.
The Dome was then gutted and almost completely torn down starting in January 2014 and the new Minnesota Vikings $1+ billion US Bank Stadium is being built and will be ready for the Vikings 2016 season.
The US Bank construction cam can be seen here. Metrodome on Wiki.