ANAMAR was contracted by the US Army Corps of Engineers, Jacksonville District to conduct a sediment evaluation to determine suitability of new work dredged material from the planned Jacksonville Harbor Deepening Project for ocean disposal.
The Jacksonville Harbor Channel Deepening project was a large civil works project that included deepening a portion of the existing channel from -40 feet to -47 feet with 2 feet of over-depth and widening the channel at several locations. ANAMAR led the sampling, testing, and reporting efforts to determine the suitability of the dredge material pursuant to MPRSA Section 103. ANAMAR planned and executed all sampling operations and met strict timelines for all deliverables, which was critical to keeping the larger deepening project on schedule.
Prior to the sampling effort, ANAMAR compiled and reviewed existing environmental data from reports and databases to identify and summarize potential spills and/or contamination that may have affected the sediment proposed for ocean disposal for the Jacksonville Harbor Deepening Project. Using this information and following procedures established in the SERIM and Green Book, ANAMAR developed a detailed SAP/QAPP.
The St. Johns River experiences tidal fluctuations resulting in very strong currents during incoming and outgoing tides; therefore, the sampling team had to plan daily sampling operations during workable currents (i.e., slack tides). Eighty substations, 31 dredged material management units (DMMUs), and several site water stations were sampled to characterize the material to be dredged for the deepening project. Sampling was completed within 4 weeks.