of its completion, it was the tallest dam in the world. Its foundation extends below the bed of the river, and the dam contains of masonry. The engineers' tablet mounted on the headhouse nearest the spillway lists the spillway length as and the total length of the dam and spillway combined as . New Croton Dam impounds up to of water, a small fraction of the New York City water system's total storage capacity of . Work began in 1892 at a site on the property of A.B. Cornell downstream of the original dam, which was submerged by the new reservoir. New Croton Reservoir was eventually able to supply a day via a new aqueduct that carried water to Jerome Park Reservoir in the north Bronx, New York City. Repair The bridge over the spillway was replaced in 1975 and again in 2005. In that same year, because of the September 11 attacks on New York City, the New York City Department of Environmental Protection proposed permanent closure of the road across the top of the dam. Pedestrians and emergency vehicles were allowed to use New Croton Dam Road, but all other traffic was re-routed. The department made plans to replace temporary vehicle barriers with permanent barriers after completion of a New Croton Dam Rehabilitation Project in 2011. Discharge Data U.S. Geological survey provides average daily discharge data for the Croton Dam here. Record discharge at the Croton Dam since records began in 1933 was on 1955-10-16 with 33,000 cfs (cubic feet per second); this was after dual hurricanes Connie and Diane. Trails Croton Gorge Park offers views of the dam from directly downstream. The Old Croton Trail, a popular hiking and biking path that roughly follows the route of the Old Croton Aqueduct, has an endpoint near the base of the dam. Teatown Lake Reservation, a nature preserve, lies nearby as does Croton Point Park in Croton-on-Hudson. References External links Dams in New York (state) Croton Watershed Buildings and structures in Westchester County, New York Dams completed in 1906 Historic American Engineering Record in New York (state) Masonry dams 1906 establishments in New York (state)