The Hultman Aqueduct forms part of the water supply system of 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 ...

, managed 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 ...

(MWRA). The aqueduct extends from Southborough to

Weston Weston may refer to: Places Australia * Weston, Australian Capital Territory, a suburb of Canberra * Weston, New South Wales * Weston Creek, a residential district of Canberra * Weston Park, Canberra, a park Canada * Weston, Nova Scotia * W ...

, connecting the

Cosgrove Tunnel The Cosgrove Aqueduct, also called the Cosgrove Tunnel, forms part of the water supply system for the communities of the Greater Boston area in eastern Massachusetts that are served by the Massachusetts Water Resources Authority. It is a man-made t ...

to the distribution network in 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. Opened in 1939, it replaced the

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. ...

. It is now itself a secondary system, having been supplanted as the primary conduit in 2003 by the MetroWest Water Supply Tunnel. From 2009 to 2014, it was rehabilitated and taken offline, in order to repair leaks which were causing losses of at least of water per day in the 1990s. The aqueduct is a pressurized pipe system, consisting of of steel-reinforced pipe at its western end, of bored tunnel under the

Sudbury Reservoir The Sudbury Reservoir (2.02 square miles) is an emergency backup Boston metropolitan water reservoir in Massachusetts, located predominantly in Southborough and Marlborough, with small sections in Westborough and Framingham. It was created when t ...

, and of steel-reinforced concrete pipe to the Norumbega Reservoir, which acts as a pressure regulation facility. Its western end is an intake, with semicircular

diversion dam A diversion dam is a dam that diverts all or a portion of the flow of a river from its natural course. Diversion dams do not generally impound water in a reservoir; instead, the water is diverted into an artificial water course or canal, which ...

, on the open channel of 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 ...

in Southborough, near the later-constructed

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 ...

. Above-ground features of the aqueduct include the intake structure and diversion dam, a headhouse for a shaft at the Sudbury Reservoir (in what is now the Sudbury Dam Historic District), and the gatehouse and dams of the Norumbega Reservoir.

References

{{Crossings navbox , structure = Aqueducts , place =

, bridge = MetroWest Water Supply Tunnel (primary)
Hultman Aqueduct (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)

(backup) , upstream =

(primary)

(secondary) , downstream = Norumbega Covered Storage Facility Aqueducts in Middlesex County, Massachusetts Weston, Massachusetts Southborough, Massachusetts Framingham, Massachusetts Wayland, Massachusetts 1939 establishments in Massachusetts Infrastructure completed in 1939