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Chas. T. Main, Inc. records

Identifier: M152


Chas. T. Main, Inc. was a Boston engineering company founded by Massachusetts Institute of Technology graduate Charles T. Main in 1893. Main was a mechanical engineer working in the textile mills of New England and a major developer in the new field of hydroelectric power. He also served as the American Society of Mechanical Engineers' President from 1918-1919. In 1926, the company was incorporated as Chas. T. Main, Inc. Main and his associates decided that all stock would be privately owned by senior engineers so that the company was free of outside influence and only those who knew the industry best would make decisions. By the 1950s, Chas. T. Main Inc. consulted or worked internationally on projects, including building a hydro-electric plant in Turkey and developing a plan to unify development of the water resources of the Jordan River Valley for its surrounding countries, Jordan, Syria, and Israel. Domestically, Chas. T. Main, Inc. began an association with the Atomic Energy Commission in 1949 and was responsible for supporting plutonium production reactors facilities, water treatment plants, and reactor coolant activities, among other nuclear projects. In 1956, a rock slide in the Niagara River New York destroyed two-thirds of the Niagara power capacity. Chas. T. Main, Inc. was contracted to create a power plant to compensate for the loss of power and save the area's economy. In the late 1980s, suffering management problems, the company was bought by Parsons Corporation of Pasadena, California. In 1992, the company's name was changed to Parsons Main, Inc., located in Canton, Massachusetts as a subsidiary of Parsons Corporation.


  • Creation: 1975-[1977+]


Language of Materials

Material is entirely in English.

Conditions Governing Access:

This collection is unrestricted.

Conditions Governing Reproduction and Use:

Requests for permission to publish material from this collection should be discussed with the University Archivist.


0.15 cubic feet (1 container)

System of Arrangement:

Arranged in one alphabetical sequence by subject.

Physical Location


Finding Aids:

A table of contents by subject is found in Folder 2.

Finding aid for the Chas. T. Main, Inc. Records
Finding aid prepared by Eliana Wachs Cashman
April 2008
Language of description
Script of description

Repository Details

Part of the Northeastern University Archives and Special Collections Repository

Snell Library
360 Huntington Avenue
Boston MA 02115 US