The Central and Southern Florida (C&SF) Project,[3] which was first authorized by the U.S. Congress in 1948, is a multi-purpose project that provides flood control, water supply for municipal, industrial, and agricultural uses, prevention of saltwater intrusion, water supply for Everglades National Park, and protection of fish and wildlife resources. The primary system includes about 1,000 miles (1,600 km) of levees, 720 miles (1,160 km) of canals, and almost 200 water control structures. The C&SF Project has performed its authorized functions well, however, the project has had unintended adverse effects on the unique and diverse environment that constitutes south Florida ecosystems, including the Everglades and Florida Bay.