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Calhan (1888, 6,507 feet) was founded by a Rock Island railroad contractor named Callahan, but its name was shortened by the U.S. Post Office. Slovaks began homesteading around Calhan in the 1890s. The farm community, which peaked in the early 1900s at about 900, had a 1990 population of 562.

Writing Credits

Thomas J. Noel

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