The reconstruction of Gilboa Dam is considered to be the most significant dam reconstruction project affecting the water supply system for New York City. In an effort to bring the Gilboa Dam up to today’s construction compliance standards, the spillway and dam face needed to be reconstructed as well as the tunnel around the dam from the Schoharie Reservoir into Schoharie Creek. The $350,000,000 rehabilitation project is expected to extend the useful life of the dam for 50 to 100 years and bring it into compliance with the latest state and federal standards, including an enhanced capacity to safely release water in the event of a dam safety emergency – a design feature critical to protecting the dam and communities downstream. WaterTectonics worked with prime contractor Barnard Construction to provide 800gpm of on-site WaveIonics electrocoagulation treatment.