East Delaware Tunnel

The East Delaware Tunnel is a 25-mile (40 km) aqueduct in the Catskill Mountains of New York State. It was constructed within a six-year period between 1949 and 1955 to transport drinking water from the Pepacton Reservoir to the Rondout Reservoir, both of which supply New York City with drinking water. The tunnel begins near the former site of Pepacton, New York, and ends near the former site of Eureka, New York, passing through Delaware County, Sullivan County and Ulster County. The tunnel has a maximum transmission capacity of 500 million US gallons (1,900,000 m³) and was constructed at a width of 11 feet (3.4 m).

New York City's Water Supply System

Croton reservoirs	New Croton Boyds Corner Middle Branch East Branch / Bog Brook Titicus West Branch Amawalk Muscoot Cross River Croton Falls / Diverting

Catskill / Delaware reservoirs	Ashokan Kensico Schoharie Roundout Neversink Pepacton Cannonsville

Controlled Lakes	Kirk Gilead Gleneida

Waterways	Croton West Branch Middle Branch East Branch Titicus Muscoot Cross Esopus Neversink Rondout Delaware East Branch West Branch

Aqueducts	New Croton Croton Catskill Shandaken Delaware Neversink East Delaware West Delaware

Storage Reservoirs	Croton Distributing Highbridge Hillview Jerome Park Jacqueline Kennedy Onassis Silver Lake Ridgewood Williamsbridge

Distribution Tunnels	NYC No. 1 NYC No. 2 NYC No. 3 (under construction) Richmond

Italics indicate a decommissioned site.