Portland Street Railway Company
The Portland Street Railway Company was the first mass transit company and streetcar line in Portland, Oregon, United States. Founded in 1872 by transportation magnate Ben Holladay, it operated horsecars on a two-mile (3.2 km) narrow gauge line on First Street, from a barn on Glisan Street in the north to Porter Street in the south.
Source: Wikipedia — Portland Street Railway Company (CC BY-SA 4.0)