Sudbury Aqueduct

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Sudbury Aqueduct Linear District
Echo Bridge.JPG
North side of Echo Bridge which carries Sudbury Aqueduct over the Charles River between Needham and Newton
Location Framingham, Sherborn, Natick, Wellesley, Needham, and Newton, Massachusetts, United States
Built 1875
Architect Clough, George A.; Et al.
Architectural style No Style Listed
Governing body Massachusetts Water Resources Authority
MPS Water Supply System of Metropolitan Boston MPS
NRHP Reference # 89002293[1]
Added to NRHP January 18, 1990

The Sudbury Aqueduct is an aqueduct in Massachusetts. It runs for 16 miles (26 km) from Farm Pond at Waverly Street in Framingham to Chestnut Hill Reservoir in Boston. Going east from Framingham, it runs through Sherborn before entering Natick. From Natick it runs east through Wellesley and Needham to the Charles River, which it crosses on the Echo Bridge into Newton. It ends at the Chestnut Hill Reservoir on the Newton side of the Newton-Boston line.[2] The Massachusetts Water Resources Authority (MWRA) operates the aqueduct.

Construction[edit]

The Sudbury Aqueduct was constructed between 1875 and 1878, and was in use for almost 100 years. It was designed to carry water from the watershed of the Sudbury River to Boston and its surrounding communities. Reservoirs in Framingham and Southborough were constructed to impound this water at the time of the aqueduct's development, and additional reservoirs in Ashland and Hopkinton were constructed in the 1880s in an attempt to meet increased demand. Finally in the 1890s the Sudbury Reservoir was created in 1898, significantly increasing the amount of water available for distribution.

The aqueduct consists primarily of a horseshoe-shaped brick lining that is 8.5 feet (2.6 m) in diameter and 7.667 feet (2.337 m) high. The bricks are set in concrete atop a foundation of concrete and stone rubble. The aqueduct is covered by an arch built of brick. The aqueduct was initially designed to carry 80 million gallons of water per day, limited by the Rosemary Brook Siphon. An additional barrel was later added to the Rosemary Brook Siphon increasing the design capacity to 110 mgd. The main conduit from Farm Pond to Chestnut Hill Reservoir is inclined one foot per mile. At a number of places on the aqueduct small buildings were built to house control equipment of various sorts. These include a gate house at Farm Pond (abandoned after a channel was constructed feeding the aqueduct from Framingham Reservoir #1 due to poor water quality at Farm Pond), a metering house in southeastern Framingham, and control houses over weirs where the aqueduct crosses over other bodies of water. These control points allow water from the aqueduct to be diverted into the watersheds it crosses. There are also control houses on either end of the Rosemary Brook siphon in Wellesley, where the water is sent through cast iron pipes to traverse an extended low spot on the route. This stretch of the aqueduct illustrates a number of the techniques used in its construction: parts of the aqueduct here are raised on an embankment, while others are in a cut, due to significant changes in local topography. Portions of the aqueduct in Natick and Newton were created by tunneling, the longest being a 4,635-foot (1,413 m) tunnel in Newton. In addition to the Echo Bridge, the aqueduct also passes over the "Waban Arches" bridge. Located in Wellesley near the Elm Bank Reservation, this nine-arch bridge carries the aqueduct across a valley containing Waban Brook near its mouth at the Charles River. The aqueduct formally ends at a terminal house just above the Chestnut Hill Reservoir in Newton.

Relegation to backup service[edit]

In the 20th century the aqueduct's functions were first augmented and then replaced by the Weston Aqueduct, the Hultman Aqueduct, and the MetroWest Water Supply Tunnel. The aqueduct was taken out of regular service in 1978,[3] and now forms part of the MWRA's emergency backup systems.

Waste Weir A and its control house in Sherborn

It was put into emergency use on May 1, 2010 when a 10-foot (3.0 m) wide supply pipe (only seven years old) broke in Weston.[4][5] Clean water was directed through alternate pipelines to bypass the break, but to provide all the water needed, but the Massachusetts Water Resources Authority supplemented the water supply by tapping the Chestnut Hill Reservoir; water from the Sudbury Reservoir was sent through the Sudbury Aqueduct to Chestnut Hill to keep that supply going. The Chestnut Hill water was untreated, so about 2 million residents in about 30 communities in the Boston area were under orders for about three days to disinfect tap water by boiling.[6]

On January 18, 1990, the route, buildings and structures associated with the aqueduct were added to the National Register of Historic Places as the Sudbury Aqueduct Linear District.[1] Much of the aqueduct's route is open to the public as an unimproved walking trail.

See also[edit]

References[edit]

  1. ^ a b "National Register Information System". National Register of Historic Places. National Park Service. 2008-04-15. 
  2. ^ Scott Johnson, The Sudbury Aqueduct, December 16, 2004
  3. ^ "MWRA history". Retrieved 2012-06-16. 
  4. ^ "Governor Patrick Lifts Boil Water Order for all 30 MWRA Communities". Official Website of the Governor of Massachusetts. May 4, 2010. Retrieved 2014-06-11. 
  5. ^ Martin Finucane, Beth Daley, and John M. Guilfoil, Globe Staff, and Sean Teehan and Caitlin Castello (May 1, 2010). "'Boil-water' order issued for nearly 2 million in Mass.". The Boston Globe. Retrieved 2010-05-04. [dead link]
  6. ^ Liz Tsai (May 4, 2010). "Water main repaired". The Tech. Retrieved 2010-05-04. 

External links[edit]