Okeechobee Waterway of Orlando and extending southward through the Kissimmee River Basin to the Everglades National Park to Florida Bay. The U.S. Army Corps of Engineers manages five locks and dams along the Okeechobee Waterway. The St. Lucie lock was built in 1941 for navigation and flood-control purposes. In 1944, the connecting spillway structure was built for flood and regulatory flow control through the St. Lucie Canal to manage the water level in Lake Okeechobee. The Port Mayaca Lock and Dam was built in 1977 for navigation purposes, to permit the raising of water levels in Lake Okeechobee, and to moderate the
Kissimmee/Okeechobee Lowland Its southern most part also contains Okeechobee Plain. The soils are Pleistocene lagoonal deposits of coastal sand and shelly silty sand. The lakes are alkaline, eutrophic, with color. Kissimmee/Okeechobee Lowland The Kissimmee/Okeechobee Lowland is one of 47 distinct lake regions within the state of Florida, United States. The Kissimmee/Okeechobee is located in the central part of the state bounding Lake Okeechobee to the south and extending north to the Osceola Slope in Osceola County. It is bounded on the west by the Lake Wales Ridge system and on the east by the Eastern Flatlands. Counties within its borders are Osceola,