Calumet and Hecla Mining Company Roundhouse

Calumet and Hecla Mining Company Roundhouse was a roundhouse for the C&H trains.

Structure
The roundhouse is built of coursed mine rock masonry in the shape of a semicircle with a turntable in the center.[4] The original structure, built in 1888 to service locomotives for the Hecla and Torch Lake Railroad, ran approximately 170 degrees around the turntable,[8] and had twelve train stalls ranging from 75 feet (23 m) deep on the south end and 90 feet (27 m) deep on the north.[4] The structure is built of random mine rock with brick arches over the windows with a shed roof.[8] Train bay doors are spanned with cast iron lintels.[8]

A later addition from 1902 increased the circumferential span of the building by 55 degrees, adding five train bays.[8] In 1907, three additions were made: a small shed and drying house, and a 75 feet (23 m) by 60 feet (18 m) machine shop.[8] The machine shop was roofed by a low gable, and the eaves and construction matched that of the original structure.[8] Finally, in 1928 an 80 feet (24 m) by 37 feet (11 m) storage area.[4]