State Road 78 historically extended to the northern tip of of a lake that covers how many sqmi?
Florida State Road 78: State Road 78 (SR 78) is the Florida Department of Transportation designation of the highway that historically extended from Pine Island Center on the Gulf Coast of Florida to the northern tip of Lake Okeechobee. Lake Okeechobee: Lake Okeechobee ( ), also known as Florida's Inland Sea, is the largest freshwater lake in the state of Florida. Lake Okeechobee:  Okeechobee covers 730 sqmi , approximately half the size of the state of Rhode Island, and is exceptionally shallow for a lake of its size, with an average depth of only 9 ft .
730