HYDRAULIC & MECHANICAL DREDGING

Great Lakes E&I’s on-water dredging capabilities include hydraulic and mechanical dredging and the placement of subaqueous caps and covers. Most recently, Great Lakes E&I team members completed a multi-year hydraulic dredging project on the Kalamazoo River removing oil-impacted sediment that resulted from a spill. This project was operationally active from 2012 to 2015 with a value of nearly $100M. Great Lakes E&I’s patented Sed-Vac technology (U.S. Patent No. 7,526,884) is a unique system for removal of sediment and oil from water utilizing industrial cleaning technology. The use of an industrial vacuum loader allows sediment to be pulled from the affected area with little or no re-suspension of contaminated sediments. High pressure water is conveyed to the suction end of the vacuum pipe through flexible hose. The suction pipe is outfitted with high pressure nozzles that are angled toward the removal area. Hardened sediments are broken loose with the high pressure water and immediately vacuumed from the affected area.

PROJECT HIGHLIGHT

SHIPPING CANAL DREDGING & PCB SOIL TREATMENT
LAKE CHARLES, LA

  • PCB contaminated soils dredging and treatment
  • GPS guided hydraulic dredging operations
  • Removal of 12,000 cy of non-tsca and 2,500 cy tsca impacted sediment
  • Onsite dewatering and treatment
  • Geotube sediment solidification

The Shipping Canal project involved the dredging of PCB-contaminated soils from a shipping canal at a carbon electrode facility. The sediment needed to be removed in accordance with an Administrative Order issued by the Louisiana Department of Environmental Quality. Several stakeholders were involved in the completion of this project and our crews interfaced with numerous client representatives and government entities.

PROJECT HIGHLIGHT

SHIPYARD SEDIMENT CLEANUP & IMPROVEMENTS
PORT of EVERETT, WASHINGTON

Port Everett WA

  • Demolition/disposal of the existing Travel Lift/Boat Haul-Out facility, marine railway,
    and designated marina docks, floats, piles, gangways, and timber bulkhead elements
  • Installation of a new sheet pile bulkhead and tieback anchor system along
    bulkhead Segments A and B
  • Excavation and landfill disposal of contaminated soil in Upland Area A

The Everett Shipyard Site Sediment and Central Marina Improvements – Phase I project was performed at the Port of Everett’s Waterfront Redevelopment area, an area of approximately 15 acres equally split between upland and marine acreage. In 2001, the Port of Everett began the waterfront redevelopment by removing several shipyard industrial buildings and a fisherman’s net shed. Various industrial activities over the past 120 years had left both soils and in-water sediments contaminated with a variety of petroleum and tar based contaminants that required removal prior to redevelopment.

ENVIRONMENTAL REMEDIATION PROJECTS

ENVIRONMENTAL REMEDIATION PROJECTS