In response to the threatened loss of the Twins, the Minnesota private and public sector negotiated and approved a financing package for a replacement stadium— a baseball-only outdoor, natural turf ballpark in the Warehouse District of downtown Minneapolis— owned by a new entity known as the Minnesota Ballpark Authority. Target Field was constructed at a cost of $544.4 million (including site acquisition and infrastructure), utilizing the proceeds of a $392 million public bond offering based on a 0.15% sales tax in Hennepin County and private financing of $185 million provided by the Pohlad family. As part of the deal, the Twins also signed a 30-year lease of the new stadium, effectively guaranteeing the continuation of the team in Minnesota for a long time to come. Construction of the new field began in 2007, and was completed in December 2009, in time for the 2010 season. Commissioner Bud Selig, who earlier had threatened to disband the team, observed that without the new stadium the Twins could not have committed to sign their star player, catcher Joe Mauer, to an 8-year, $184 million contract extension. The first regular season game in Target Field was played against the Boston Red Sox on April 12, 2010, with Mauer driving in two runs and going 3-for-5 to help the Twins defeat the Red Sox, 5–2.