Narrow-gauge railroads in the United States - Wikipedia
https://en.wikipedia.org/wiki/Narrow-gauge_railroads_in_the_United_States
In New England, the first narrow-gauge common-carrier railroad was the Billerica and Bedford Railroad, which ran from North Billerica to Bedford in Middlesex County, Massachusetts from 1877 to 1878. There were extensive 2 ft (610 mm) gauge lines in the Maine forests early in the 20th century. In addition to hauling timber, agricultural products and slate, the Maine lines also …
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