A $250-million tax break is expected to resurrect expansion plans at the Mall of America. The owners of the Bloomington megamall say that the $1.5-billion project would double the size of the mall by adding hotels, a waterpark, a performing arts center, officer towers and hundreds of stores. When the expansion project will begin is still unknown. The plan was developed in 2006, but remained on the shelf as backers hoped for a subsidy. State lawmakers passed the tax break just before the legislative session ended at midnight Monday. The Mall of America attracts 42-million visitors each year.