Wachusett Aqueduct Linear District
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Why it's listed
This twelve-mile aqueduct carried water from the Nashua River area at Clinton southeast to Sudbury Reservoir in Southborough. Built in 1896-98, it combines two miles of tunnel, seven miles of masonry conduit and three miles of open channel, with four chambers, an aqueduct bridge, six vehicular bridges and three small dams. Notable structures include the seven-arch, granite-faced Assabet River Bridge in Northborough and small granite-faced concrete arch bridges over the open channel. Designs came from the office of Chief Engineer Frederic P. Stearns, and several contractors built the work. It was the first project of the Metropolitan Water Board, created in 1895, and it supplemented the Sudbury reservoirs. After the Wachusett Reservoir opened in 1906-07, it conveyed the Boston area's principal supply until the Quabbin Reservoir was completed in the 1940s. The aqueduct was taken out of service when the Wachusett-Marlborough Tunnel bypassed it in the mid-1960s.
Significance in brief: It was the first aqueduct built under the Metropolitan Water Board to increase fresh water supply for the Boston area, and the first project of that board. It belongs to the third stage of the metropolitan Boston water system's development. It also shows design and construction features typical of the water system as it evolved between 1845 and 1926.
Machine-generated summary. This summary was generated by a language model from the official nomination document and has not been reviewed line by line by an editor. It may contain errors. Check the source document before relying on any detail. Source: nomination document (PDF) · National Archives catalog entry. NRHP reference 89002276, listed January 18, 1990. Summary generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29, confidence medium).
Key facts
| Address | Along Wachusett Aqueduct from Wachusett Reservoir to Sudbury Reservoir, Clinton |
|---|---|
| County | Worcester County |
| Listed | January 18, 1990 |
| Reference number | 89002276 |
| Resource type | District |
| Period of significance | 1896-1926 |
| Architect / builder | Designed in the office of Chief Engineer Frederic P. Stearns, with Ruben Shirreffs contributing to the Assabet River Bridge; built by Moulton & O'Malley of Boston, Jones, Pollard & Co. of Baltimore, and E. D. Smith & Co. of Philadelphia. |
| Criteria |
|
| Areas of significance | Community Planning and Development, Engineering, Politics/Government, Architecture |
| Level of significance | State, Local |
| Status (as stated in the nomination) | Listed as not in service; the aqueduct was bypassed by the Wachusett-Marlborough Tunnel in the mid-1960s. General condition is given as fair to good. |
| Acreage | 180 |
| Coordinates | 42.37657, -71.64831 (NPS GIS) |
What listing means for this property
This is a historic district. Buildings within its boundary are either contributing (they add to the district's significance) or non-contributing. Owners of contributing income-producing buildings can claim the 20% federal rehabilitation tax credit; homeowners should look at state credits. National Register districts impose no design review by themselves; a local historic district ordinance, if one exists, does (the difference explained).
General information, not legal or tax advice. Rules change; confirm with your State Historic Preservation Office or a qualified adviser.
Sources and further reading
- National Park Service, National Register of Historic Places database (snapshot May 2026), reference 89002276.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q7958781
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.