Coal was discovered in 1883 on land owned by the Northern Pacific Railway Company. The company located several mines in 1886. The town of Roslyn was established during these years, was dedicated on November 22, 1889 and incorporated in 1890 with a population on 1,480.
"Early Day Roslyn" (1889). Ellensburg History Photographs. 18.
Local History Collection Photographs, Ellensburg Public Library
Kittitas County (Wash.) -- Cityscapes, Historic districts -- Washington (State) -- Kittitas County, Cityscapes -- Washington (State) -- Kittitas County, Roslyn (Wash.) -- Cityscapes, Coal mines and mining -- Washington (State) -- Roslyn, Northern Pacific Railway Company