Dredges and Crane Barge working in very shallow water upstream of low bridges

Project Highlights

Dredging of PCB's from the Hudson River
Fort Edward, New York

• One of the largest polychlorinated biphenyl (PCB) remediation projects in U.S. history
  
  
• Required dredging of 250,000 yd^3 of PCB impacted materials from the Hudson River and Navigation material from the Champlain Canal
  
  
• Included the construction of a sheet pile cofferdam and dredging within to provide data relating to the effectiveness of this concept.
  Required the placement of over 2 million square feet of single and multi layer backfill, and capping layers.
  
  
• Included the placement of different shoreline protection measure depending on shoreline cut depth and river velocity.
  
  
• Required working 24/6 in two 12 hour shifts with up to 15 dredge platforms, 20 hopper barges, 10 deck barges, 20 tug boats, and 13 support vessels to complete the project
  
  
• Additional Work included:
  
  
• Initial tree trimming and removal along shoreline
  
  
• Debris removal of previously identified targets prior to dredging
  
  
• Installation of resuspension control devices including a rock dike with flow control valves, a silt curtain access gate, and conventional silt curtains
  
  
• Real Time Turbidity Monitoring of dredging and backfill operations
  
  
• Quality of Life monitoring of Noise, Light, Odor, and Navigational Impacts
  
  
• Installation and removal of 120,000 SF of sheet pile