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  • Melville, NY
  • Iselin, NJ
  • Ossining, NY
  • Mount Laurel, NJ

Rondout-West Branch Bypass Tunnel


Towns of Newburgh and Wappinger, New York<br style='line-height:2px'>New York City Department of Environmental Protection

HAKS, as a 30% subconsultant, is providing Construction Management services to the New York City Department of Environmental Protection (NYCDEP) for the $1.2 billion new Rondout-West Branch Bypass Tunnel and repairs to the existing tunnel to eliminate multiple leaks. The existing Rondout-West Branch Tunnel supplies 50 percent of New York City’s daily water usage. The project for the bypass tunnel began in January 2013 and will take 9 years to complete. 

Our services include shaft and tunnel inspection, office engineering, cost estimating, change order management and resident engineering for the new mainline tunnel.

The project features:

  • Extensive site preparation at the Roseton shaft site (near Newburgh), including the widening of the adjacent Route 9 highway and construction of a dewatering force main to the Hudson River, as well as grading and extension of utilities to the project site.
  • Preparation at the Wappinger site consisting of grading stormwater protection and the extension of utilities to the work site.
  • New access shafts on each side of the river at depths of 700 and 900 feet each.
  • New 2.5-mile-long, 14-foot-diameter bypass tunnel alongside the existing Rondout-West Branch Tunnel with complex interconnection tunnels between the existing and new bypass tunnel.
  • Shutdown and dewatering of the Rondout-West Branch Tunnel to allow for the interconnections to the new bypass tunnel. This was completed within a 14-month window, the estimated period New York City could be without this major water supply.
  • Repairs to the 1,000-foot-deep Rondout-West Branch Tunnel at Wawarsing (near Wappinger), New York.

HAKS also provided a Quality Management System to meet client requirements, including continual improvement and prevention of non-conformances.