USACE routinely dredges several projects on the Oregon Coast and Columbia River to maintain their federally authorized navigation channels. In accordance with the Clean Water Act, USACE conducts sediment sampling and analysis at these projects prior to dredging to determine suitability for unconfined in-water disposal of dredged sediments and aquatic exposure of the post-dredge surface material. There is an ongoing need in the Lower Willamette River (LWR) federal navigation channel (FNC) to maintain access for large, deep-draft commercial shipping vessels to Portland Harbor via this channel. This project evaluates sediment quality for three critical shoals in the LWR FNC project area.
The data quality objectives for this sediment characterization were to:
ANAMAR was responsible for coordinating all field logistics, subcontracting a suitable vibracore vessel, leading and supervising all field sample collection and sample processing activities, coordinating shipping logistics with the laboratories to ensure samples arrived in good condition and were processed within holding times, performing data QA/QC, compiling results into tables, and identifying exceedances of screening criteria.
Roles/Responsibilities