SPECS Encl 4b Cheesequake Creek Jetty (43-140) Physical Analyses.xlsx

This is a physical sediment analysis data sheet for the Cheesequake Creek East Jetty Rehabilitation project. The document presents laboratory test results from six borehole locations (BH-1 through BH-6) at various depths, with samples analyzed for moisture content, Atterberg limits (liquid limit, plastic limit, and plasticity index), and grain size distribution. The grain size analysis breaks down sediment composition into percentages of gravel, sand (coarse, medium, and fine), and fines (silt and clay). Samples were collected at depths ranging from 0-2 feet to 20-22 feet below surface, with moisture content varying significantly from 0 percent to 86.8 percent depending on depth and location. The data indicates diverse soil compositions across the site, with some samples showing high clay and silt content (up to 88.9 percent fines) while others are predominantly sandy or gravelly.

This technical data supports the geotechnical characterization of sediment conditions at the jetty site and would inform design and construction decisions for the rehabilitation project managed by the Department of the Army Corps of Engineers, Engineering District New York. The physical properties documented—including grain size, plasticity characteristics, and moisture conditions—are essential for evaluating sediment stability, dredging requirements, fill material suitability, and construction methodology for the East Jetty Rehabilitation work.