Most contaminated sediment remedies involve at least some dredging and remedies often require large volumes of sediment to be dredged. Designing dredging operations for contaminated sediments is a complex undertaking. This presentation will cover the latest design and evaluation approaches for all aspects of dredging contaminated sediments. Logical approaches for selecting the appropriate dredging equipment will be presented and the value of operational restrictions discussed. The latest approaches for estimating corollary impacts associated with dredging such as water column and atmospheric releases will be presented. Recently collected data on post-dredging residual contamination will be discussed along with their implications for dredging remedies.
Dredging also necessitates ex-situ sediment management. Managing large volumes of sediments produced continuously at a high production rate presents significant challenges without the presence of contamination. Contamination presents additional challenges. The presentation will discuss sediment management alternatives including the design of confined disposal facilities and ex-situ treatment options.