projects > L-31N seepage management pilot > scope of work
Project Scope of Work
Project Scope of Work 2003
L-31N Well-Site Data Acquisition
The goal of the L31N Seepage Management Pilot Project is to reduce levee seepage that moves from Everglades National Park to the east. As participants in this pilot project, the South Florida Water Management District (SFWMD), the US Army Corps of Engineers (USACE), and the United States Geological Survey (USGS) are working together to provide a hydrogeologic characterization of the Surficial aquifer underlying the L31N Levee in Miami-Dade County, Florida. Because there is little detailed hydrogeologic data of the Surficial aquifer (to depth) in this area, the L-31N Seepage Management Project Delivery Team (PDT) will install two clusters of monitor wells and four additional coreholes along the levee to provide the necessary detailed hydrogeologic data to the PDT.
The objectives of this data acquisition project are to provide the on-site geologic expertise while the four coreholes and the deepest well in each cluster are drilled and constructed, and to complete the downhole geophysical logging including video and flow meter logging of these boreholes. The USGS on-site geologist will provide technical guidance to the drill crew, describe the lithology of the core and unconsolidated sediments, and store the cores and sediment samples for the duration of the project. USGS staff will provide and run gamma ray, fluid conductivity and temperature, EM-induction, 3-arm caliper, full wave form sonic tools, a heat-pulse flow meter, an OBI-40 Mark III digital optical tool, and the Laval video tool.
This project is scheduled to begin in the summer of 2003 (concurrent with the installation of the L31N Seepage Management Pilot Project monitor wells) and will be completed in approximately five months. The purpose is to provide the L31N PDT with knowledgeable hydrogeologic staff with experience in the general area, to guide geologic data acquisition and, to summarize drilling results.
The USGS geologist will be on site while the drill crew is preparing to drill and while drilling, developing, and constructing the four coreholes and the deepest well in each cluster. The site geologist will:
USGS staff will run USGS geophysical tools, flow meters, and video tools to log the four coreholes and deepest well in each cluster and will calibrate the sonic velocity log to the seismic reflection profile prepared by Jack Kindinger in 2002.
Work Responsibilities of the Parties
Oversight of the drilling contractor and descriptions of the lithology will begin when the drilling contractor begins work. It is expected that this will occur prior to June 15, 2003. A draft geologic cross-section will be available for review by District staff within four months of completion of the four coreholes and two deep monitor wells.
U.S. Department of the Interior, U.S. Geological Survey
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Last updated: 04 September, 2013 @ 02:08 PM(KP)