The Cosgrove Aqueduct, also called the Cosgrove Tunnel, forms part of the water supply system for Boston

Boston

Boston is the capital of and largest city in Massachusetts, and is one of the oldest cities in the United States. The largest city in New England, Boston is regarded as the unofficial "Capital of New England" for its economic and cultural impact on the entire New England region. The city proper had...

, Massachusetts

Massachusetts

The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...

, operated by the Massachusetts Water Resources Authority

Massachusetts Water Resources Authority

The Massachusetts Water Resources Authority is a public authority in the Commonwealth of Massachusetts that provides wholesale drinking water and sewage services to certain municipalities and industrial users in the state, primarily in the Boston area.The authority receives water from the Quabbin...

. It is a man-made tunnel connecting the eastern end of the Wachusett Reservoir

Wachusett Reservoir

The Wachusett Reservoir is the second largest body of water in the state of Massachusetts. It is located in central Massachusetts, northeast of Worcester. It is part of the water supply system for metropolitan Boston maintained by the Massachusetts Water Resources Authority . It has an aggregate...

 to the Walnut Hill Water Treatment Plant in Marlborough

Marlborough, Massachusetts

Marlborough is a city in Middlesex County, Massachusetts, United States. The population was 38,499 at the 2010 census. Marlborough became a prosperous industrial town in the 19th century and made the transition to high technology industry in the late 20th century after the construction of the...

, and is linked to the MetroWest Water Supply Tunnel

MetroWest Water Supply Tunnel

The MetroWest Water Supply Tunnel is an advanced underground aqueduct that supplies potable water to residents of much of Greater Boston. It is part of the Massachusetts Water Resources Authority water supply system....

.

The tunnel came on line in 1965, when it replaced the Wachusett Aqueduct

Wachusett Aqueduct

The Wachusett Aqueduct carries water from the Wachusett Reservoir to the John J. Carroll Water Treatment Plant at Walnut Hill in Marlborough, Massachusetts...

 as the main conduit used to deliver water from the Wachusett Reservoir. It has a capacity of 600 million USgals (2,271,247.2 m³) per day.

See also

• Cosgrove aqueduct
  Cosgrove aqueduct
  Cosgrove aqueduct is a navigable cast iron trough aqueduct that carries the Grand Union Canal over the River Great Ouse, on the borders between Buckinghamshire and Northamptonshire at the northwest margin of Milton Keynes in England. The present structure was built in 1811, to replace a previous...
  
  , England