In order to (i) provide a high quality recreational attraction in the western part of the Commonwealth; (ii) expand the historical knowledge of adults and children; (iii) promote tourism and economic development in the Commonwealth; (iv) set aside and conserve scenic and natural areas along the Roanoke River and preserve open-space lands; and (v) enhance and expand research and educational programs, there is created a political subdivision of the Commonwealth to be known as “The Virginia Recreational Facilities Authority.” The Authority’s exercise of the powers conferred by this chapter shall be deemed to be the performance of an essential governmental function.