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
Lake Eva (Lake Alfred, Florida) Lake Eva (Lake Alfred, Florida) Lake Eva, located west of Polk County Road 557, is on the north side of the city of Lake Alfred, Florida. This lake is somewhat kidney-shaped and has a surface area of . Lake Eva in inside the Lake Alfred city limits and is west of Polk County Road 557. Its east shore is bordered by some homes with large lots. The northeast, north and west shores are bordered by citrus groves. A swampy area is on the south shore and a grassy area is along the southeast shore. Lake Eva is completely surrounded by