Lake Okeechobee Valley and the Everglades. The trough is underlain by clay deposits that compacted more than the limestone and sand deposits did along both coasts of peninsular Florida. Until about 6,000 years ago, the trough was dry land. As the sea level rose, the water table in Florida also rose and rainfall increased. From 6,000 to 4,000 years ago, wetlands formed building up peat deposits. Eventually the water flow into the area created a lake, drowning the wetlands. Along what is now the southern edge of the lake, the wetlands built up the layers of peat rapidly enough (reaching thick) to
Okeechobee Waterway Okeechobee Waterway The Okeechobee Waterway or Okeechobee Canal is a relatively shallow man-made waterway in the United States, stretching across Florida from Fort Myers on the west coast to Stuart on Florida's east coast. The waterway can support tows such as barges or private vessels up to wide x long which draw less than , as parts of the system, especially the locks may have low water depths of just ten feet. The system of channels runs through Lake Okeechobee and consists of the Caloosahatchee River to the west of the lake and the St. Lucie Canal (C-44) east of