Neversink Reservoir is one of several in the Catskill Mountains that supply water to New York City and other communities along its water supply network. It is located in Sullivan County's Town of Neversink, 75 miles (120.6 km) northwest of the city.
It is fed by the Neversink River, the longest tributary of the Delaware River. Water collected in the reservoir in turn goes through the Neversink Tunnel a short distance east to Rondout Reservoir to be pooled with that from Pepacton and Cannonsville as well, providing nearly half of the city's daily consumption.(Wikipedia)