Shawmut, according to 19th-century scholarship, is a term derived from the Algonquian word Mashauwomuk referring to the region of present-day Boston, Massachusetts. It appears in a number of present-day placenames.
It appears in print very early in the history of New England; records from 1630 note that William Blaxton was "dwelling on the other side of Charles River, alone, at a place by the Indians called Shawmutt."
The meaning of Shawmut is uncertain. Most explanations refer to either the salt water surrounding the peninsula, from which come explanations like "canoe landing place" or "place to ferry across", or to the springs of fresh water found within, a major inducement for the settlement of the Massachusetts Bay Colony at that site.
This word appears in several place-names, not all of which can be traced with certainty to the Mashauwomuk place name.
Shawmut is a subway station on the Ashmont branch of the MBTA Red Line, located on Dayton Street in Dorchester, Massachusetts. The station, the only underground station on the Red Line south of Andrew, is in of a shallow cut-and-cover subway tunnel that runs from Park Street in Dorchester south to Peabody Square where it surfaces at Ashmont. Shawmut opened along with Ashmont on September 1, 1928 as part of a southward extension of the Cambridge-Dorchester Line.
In 1872, the Old Colony Railroad took over the Shawmut Branch Railroad, which branched off the main line at Harrison Square and ran through Dorchester to Milton. The branch line originally included stations at Melville Avenue and Centre Street, just one-quarter mile apart, which were consolidated into Shawmut station in 1884. Shawmut station was located between Mather and Centre streets on the east side of the tracks.
The New York, New Haven and Hartford Railroad acquired the Old Colony and took over operations in 1893. In 1924, the Boston Elevated Railway bought the Shawmut Branch Railroad and part of the Milton Branch in preparation for extending the Cambridge-Dorchester Line, although New Haven trains ran on the line until 1926.
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