Executive Summary Introduction >Study Area & Objective Methods Results Summary & Recommendations Acknowledgements & References Statement of Work Appendix A Appendix B PDF Version

The Lake Belt Area consists of an approximately 230 km² (89 mi²) area located in north-central Miami-Dade County, south of the Miami-Dade/Broward County line, west of the Homestead Extension of the Florida Turnpike (HEFT), east of Krome Avenue, and north of Kendall Drive (Fig. 7). Water Management structures for this area includes the ECPL System and a series of drainage canals. The ECPL System includes L-33, L-30, and L-31N, and separates the Lake Belt Area and lands to the east from WCA-3B and the ENP expansion area (Fig. 2). The levees allow higher water levels to be maintained in the WCA and ENP. Providing the primary drainage of lands to the east of the levees is a series of major canals that include the C-9, C-6, C-4, and others (Fig. 2). These levees and canals are operated by the SFWMD. Smaller, secondary canals (such as Black Creek Canal) operated by Miami-Dade County and the South Broward Drainage District drain into the primary canal system.

The SFWMD and the US Geological Survey (USGS) have agreed to cooperatively work on a project to complete a high-resolution, seismic reflection profile of the area around several CERP projects. High-resolution, seismic reflection profiling is a continuously recorded towed geophysical technique that can be used to identify subbottom geologic features beneath bodies of water. The SFWMD needs to develop a better understanding of the geology underlying a number of areas within the Lake Belt Area. Characterization of the stratigraphy to a depth of about 61 m (200 ft) below land surface is considered critical to the success of several SFWMD projects. Analysis of the seismic data may identify sites for further detailed geologic investigation. The USACE is a partner to the SFWMD on all CERP projects.

The Lake Belt Reservoir Pilot Project and the L31N Seepage Management Pilot Project are the primary focus of this study. If time allowed, some seismic profiling may be done in other areas. The USGS, St. Petersburg Team agreed to complete high-resolution, single-channel seismic reflection profiling on up to 90 km (56 mi) of canals within the project area (Fig. 8).

Figure 7. The location of major highways that provide the transportation arteries necessary to deliver rock products in Miami-Dade and southern Broward Counties. [larger image]	Figure 8. Seismic-survey track map showing locations of seismic profiles with shotpoint references. Also shown are locations of core descriptions from previous reports that were used to verify seismic-reflection horizons and features. Colors were used to differentiate and help identify profile overlap. [larger image]

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