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
South Central Florida Express, Inc. at Marcy and interchanges with the Florida East Coast Railway at Fort Pierce, with haulage rights to CSX and Norfolk Southern at Jacksonville, Florida. The of track on the west side of Lake Okeechobee between Sebring and Lake Harbor was previously a CSX line (Sebring Subdivision along the mainline to the sugar fields, and Okeelanta Subdivision on the spur to Lake Harbor). The northernmost 42 miles of the west side between Sebring and Harrisburg (just south of Palmdale) was built in 1916 by the Atlantic Coast Line Railroad as part of an effort to extend their Haines City Branch south