03/22/2016 - Laserfiche WebLink

Home Browse Search

Sgptember 2015 3-17 14-14979 The relatively low-permeability upper portion of this formation combined with the lower portion of the Avon Park Formation make up the confining unit that overlies the Boulder Zone. Cedar Keys Formation The Cedar Keys Formation is of the Paleocene Age. The top of the Cedar Keys Formation is anticipated to be at a depth of approximately 3,200 ft at the Site. The upper portion of the Cedar Keys Formation is often dolomite and dolomitic limestone, while the lower portion consists of thick beds of anhydrite. The Cedar Keys Formation is generally considered to be the lower confining unit to the Floridan Aquifer System. 3.3.1.2 Detailed Site Litholg& The surface soils of the Site consist of nearly level,poorly drained, sandy soil to a depth of more than 80 inches. Loamy or organically coated subsoil may be present. These soils are deposited in areas of flatwoods, sloughs and on hammocks and identified on the general soil map of the Soil Survey of Okeechobee County, Florida (USDA, 2003) as the Riviera-Basinger-Myakka unit over the majority of the Site, and the Riviera-Basinger-Myakka unit to the western edge of the Site. Based on the Custom Soil Resource Report (Appendix 3, Ardaman, 2015), the majority(>80 percent) of the soils to more than 80 inches are Myakka fine sand and Basinger fine sand with 0 to 2 percent slopes. These soils are classified as Hydrologic Soil Group A/D. Based on boring data, soils at the Site consist generally of loose to medium dense fine sand with varying amounts of clay and shell fragments from the ground surface to depths of about 43 to 48 feet followed by moderately hard slightly clayey, poorly cemented sand and shell and sandy shell to depths of about 58 to 63 feet, in turn followed by alternating layers of lose to medium dense slightly clayey to clayey fine sand with shell fragments and medium stiff to stiff clay to the termination depth of our deepest boring at about 100 feet (Ardaman, 2015). Groundwater in the boreholes of the SPT borings was observed at depths of approximately 0.5 to 2 feet below the ground surface in the area of the OCEC and at depths of about 3 to 7 feet beneath the entrance roadway. 3.3.1.3 Geologic Maps Figure 3.3.1-2 provides a map depicting Pleistocene age marine terraces of Okeechobee County. Figure 3.3.1-3 provides an isopach map of the Surficial Aquifer. The low-permeability Hawthorn Group underlies the Surficial Aquifer. Attachment lb PRL 200