Sediment / Dredged Material Management

KEI is a recognized leader with more than 45 years’ experience in performing marine and freshwater sediment quality studies and the planning, collection, and evaluation of dredged materials from ports, harbors, estuaries, rivers, lakes, and the open ocean. KEI has performed sediment quality studies in conjunction with industrial and other discharges in near- and offshore environments along coastal California, Hawaii, and Alaska.



  • Vibracore and gravity core sampling

  • Sampling and analysis plan (SAP) preparation

  • Sediment grab sampling (e.g. Van Veen grab, Ponar grab, box core, pipe dredge)

  • Long tube column settling tests

  • Boat, barge, and crane operations

  • Disposal suitability determinations

  • Regulatory compliance support

  • Contaminated sediments management plans

  • Contaminated sediment remediation studies

  • Ecological risk assessments

  • Presentations to regulators

  • CWA Section 404(b)(1) evaluations

  • MPRSA ocean dumping evaluations


For dredged materials investigations, KEI’s team of sediment scientists evaluates physical, chemical, and biological test results according to published testing manuals to produce technical reports for permitting agencies. These reports detail suitability for reuse/placement options for dredged material including upland fill, beach nourishment, habitat restoration, unconfined in-bay aquatic placement, confined aquatic disposal, and open-ocean disposal. 

Surface sediment scrape/grab for wet weather monitoring in Camp Pendleton, CA