Sediment remediation sites are complex, dynamic environments that require a wide range of capabilities and skills to develop implementable and effective long-term solutions. Challenges at these sites may include debris, aging shoreline structures, underwater utilities, poor sediment stability, adverse hydrodynamic and tidal conditions, high-volume industrial water intakes, deep water, as well as important competing site interests (i.e., navigation, recreation, berthing, and ship offloading) that must be accounted for during design and construction.
EA’s in-house engineers, scientists, and risk assessors have extensive experience with these challenges and complex sediment projects including hands on remedial experience for work in marshes, mudflats, estuaries, lakes, rivers, and industrial waterways. EA’s design experience includes dredging, isolation capping, reactive capping, confined disposal facilities, confined aquatic disposal, upland disposal, enhanced monitored natural recovery, sustainable bioremediation, and habitat restoration. In support of these designs, EA has prepared applicable permits, performed hydrodynamic modeling, conducted dewatering analysis, modeled sediment capping approaches, conducted value engineering and constructability reviews, participated in stakeholder engagement, as well as conducted treatability studies for sediment amendments, chemical stabilization, and water treatment. Our in-house toxicity and bioaccumulation laboratory, fleet of boats, and sediment coring and hydrographic equipment provide an outstanding complement to our sediment remediation design capability.