A small citizens' committee concerned about the U.S. Army Corps of Engineers' plans for flood control on a downtown section of the Flint River initiated the formation of Riverbank Park. The committee sought a more natural method of flood control and wanted to improve and promote the decaying metropolitan area. Halprin and Associates, an internationally known landscape architecture firm in San Francisco, was hired and citizen workshops were held citywide to guide the future of Riverbank Park. The park utilizes concrete and plant material in angular and geometric forms. Interest points along the river include the Archimedes Screw, a sculptural device that is propelled by water at the falls; two islands; an amphitheater; water walls; a play area; a fish ladder; picnic sites; and sculptures. From spring through fall the park draws people downtown.