WALTON – Repairs to the three original boreholes downstream of Cannonsville Dam have been completed by the New York City Department of Environmental Protection, ending the second stage of repairs.
That focused on using a stiff grout to seal shut the original boreholes
that created a cloudy discharge of water into the West Branch of the Delaware
River in early July.
During the first stage of repairs, a series of relief wells were installed to reduce pressure from the underground aquifer and provide a new path for the water to flow. By pumping some 100 gallons per minute, the relief wells ended the discharge of cloudy water on August 2. Since then DEP has been testing the repairs.
While repairs have been completed, the agency will continue to monitor the situation until Cannonsville Reservoir refills next spring, officials said.
