Sediment Remediation

DOF has over 20 years of sediment remediation expertise, designing multiple EPA mega projects including the preparation of all design documents required for federal and state agencies.

Click here to see the full sediment remediation SOQ

Remedial Design and Construction

  • Sediment remediation design
  • Habitat restoration/NRDA settlement
  • Barge-to-rail offload design
  • Precision dredging and methods to eliminate residuals
  • Contract documents, Cost estimates, and schedules for in-water construction

Sediment Management Evaluation

  • River hydraulics, sediment transport, and erosion control
  • Bank and Shoreline Rehabilitation Alternatives
  • Remediation technologies: MNR, ENR, capping, carbon amendments, dredging
  • Disposal site identification, selection, and design
  • Dredging material re-handling methods for upland disposal
  • Remedial investigations for EPA Superfund sediment cleanup projects

Data Collection

  • Sediment characterization for dredging and disposal
  • Contaminated sediment sampling and characterization
  • Hydrographic surveys
  • Water sampling and water quality monitoring
  • Feasibility studies for EPA Superfund sediment cleanup projects
  • Compliance monitoring during remediation
  • Long-term monitoring

[Head of Hylebos] remains one of the few sites where cleanup levels were obtained by dredging alone. The sediment remediation project successfully achieved the project SQOs with no residual sediment exceeding the SQOs.“ - The National Research Council

Clients routinely seek our services from pre-design through implementation.

Pre-Design. One size does not fit all. Every stretch of a site has unique physical and land use characteristics, each of which bears on the nature and sustainability of cleanup actions. Evaluation of these site factors allow us to identify viable long-term remedial technologies for each subarea of the site. Results guide our design strategy.

Design Studies. Conceptual remedial designs defined during the feasibility study phase of Superfund activity typically need to be refined by supplemental engineering and sediment characterization studies. The scope, schedule, and data quality objectives of such supplemental studies guide our design strategy. The DOF team of technical experts examines various site factors and issues that influence the design and viability of alternative or multiple remedial technologies.

Remedial Design. Applying the findings of the design studies, DOF’s remediation and construction engineers refine the application of remedial technologies to accommodate the specific conditions in each subarea of the site and prepare key documents.

Remedial Action Implementation. Collaborating with each project owner, DOF’s engineers tailor construction contracts to achieve project objectives while eliminating adverse incentives that can undermine success. Our clients often have us serve as the construction manager, with an on-site resident engineer and staff to monitor the work, collect confirmation sampling data, interact with regulatory agencies, and resolve implementation and performance issues as they arise.