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

Greater Boston Greater Boston is the metropolitan region of New England encompassing the municipality of Boston (the capital of the U.S. state of Massachusetts and the most populous city in New England) and its surrounding areas. The region forms the northern ar ...

area in eastern

Massachusetts Massachusetts (Massachusett language, Massachusett: ''Muhsachuweesut assachusett writing systems, məhswatʃəwiːsət'' English: , ), officially the Commonwealth of Massachusetts, is the most populous U.S. state, state in the New England ...

that are served by the

Massachusetts Water Resources Authority The Massachusetts Water Resources Authority (MWRA) 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 th ...

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

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 Massachuset ...

to the

John J. Carroll Water Treatment Plant The John J. Carroll Water Treatment Plant (CWTP) is a water treatment plant operated since 2005 by the Massachusetts Water Resources Authority (MWRA) to treat water bound for Greater Boston. The plant is located at the town lines of Marlborough, N ...

Marlborough Marlborough may refer to: Places United Kingdom * Marlborough, Wiltshire, England ** Marlborough College, public school * Marlborough School, Woodstock in Oxfordshire, England * The Marlborough Science Academy in Hertfordshire, England Austral ...

. From the treatment plant, water is delivered to the Boston area primarily by the MetroWest Water Supply Tunnel. The tunnel came on line in 1965, replacing the

Wachusett Aqueduct The Wachusett Aqueduct is a secondary aqueduct that carries water from the Wachusett Reservoir to the John J. Carroll Water Treatment Plant at Walnut Hill in Marlborough, Massachusetts. It is part of the public water supply system for the commu ...

as the main conduit used to deliver water from the Wachusett Reservoir. It has a capacity of per day. The Wachusett Aqueduct now forms part of the backup water supply system, and was briefly reactivated in 2003 to facilitate the interconnection of the Cosgrove Tunnel to the MetroWest Water Supply Tunnel.

References

{{Crossings navbox , structure = Aqueducts , place =

, bridge = Cosgrove Tunnel (primary)

(secondary) , upstream =

, downstream = MetroWest Water Supply Tunnel (primary)

Hultman Aqueduct The Hultman Aqueduct forms part of the water supply system of eastern Massachusetts, managed by the Massachusetts Water Resources Authority (MWRA). The aqueduct extends from Southborough to Weston, connecting the Cosgrove Tunnel to the distributi ...

(secondary)

Sudbury Aqueduct The Sudbury Aqueduct is an aqueduct in Massachusetts. It runs for from Farm Pond at Waverly Street in Framingham to Chestnut Hill Reservoir in Boston’s Chestnut Hill neighborhood. A later built extension main runs from the Farm Pond gateh ...

(backup)

Weston Aqueduct The Weston Aqueduct is an aqueduct operated by the Massachusetts Water Resources Authority (MWRA). Now part of the MWRA backup systems, it was designed to deliver water from the Sudbury Reservoir in Framingham to the Weston Reservoir in Weston. ...

(backup) Aqueducts in Middlesex County, Massachusetts Transportation buildings and structures in Worcester County, Massachusetts Aqueducts in Massachusetts