- South Florida Water Management District
- Broward County, Florida
- Our Role
- Geophysical Investigation.
- Subsurface profiles of the levee body and foundation materials for levee segments
- Documentation of the soil borings and MASW survey results
- Identification of subsurface conditions along the ECPL.
Gannett Fleming provided the South Florida Water Management District’s (SFWMD’s) Bureau of Engineering and Construction engineering support for a technical evaluation of a portion of its Everglades Water Conservation Area levees also known as the East Coast Protective Levee (ECPL) System.
SFWMD is pursuing the certification of the ECPL system in accordance with Code 44 of Federal Regulations 65.10 titled, mapping of areas protected by levee systems. It provides the minimum design, operation, and maintenance standards levees must meet in order to be recognized as providing protection from the base flood, also known as one-percent-annual-chance flood on Flood Insurance Rate Maps. For a levee to be accredited by FEMA as providing protection from the base flood, it must be certified by a professional engineer or a federal agency that designs levees along with the submittal of engineering documents complying with this policy.
The MASW survey was effective in identifying anomalous conditions along the ECPL. Because MASW provides a continuous profile of the subsurface, it is ideal for exploring long, narrow easements and alignments, such as levees, roads, dams, and utility corridors. MASW is the only non-destructive geophysical method that can continuously profile to depths of 100 feet and provide a visual profile of the subsurface area.
- The MASW survey results were provided in a report that included shear wave velocity profiles delineating the relative stiffness of the levee body and foundation materials for each levee segment and documentation of the soil borings.
- MASW is a non-invasive, non-destructive, continuous profiling method.