Southdown Challenger

The Southdown Challenger lets off a little steam while docked at the St. Mary's Cement plant on KK Avenue in Milwaukee.  The Challenger was originally built in 1906, though her cement career started in 1966 as the Medusa Challenger, and she became the St. Mary's Challenger after this photo was taken.  Mark W. Hintz photo, 03/16/05, Milwaukee WI

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