When finished, the development in Prior Lake some 20 miles southwest of Minneapolis, will feature a new nine-story hotel with 180 rooms alongside a 70,000 sq ft convention center known as Mystic Lake Center. The Shakopee Mdewakanton Sioux Community (SMSC) of Minnesota has broken ground on an expansion to its Mystic Lake Casino Hotel and revealed that it expects to complete construction by the end of next year. Latest Casino and Gambling News, Casino expansion projects, Minnesota