"Encyclopedia Dubuque is the online authority for all things Dubuque, written by the people who know the city best.”
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Affiliated with the Local History Network of the State Historical Society of Iowa, and the Iowa Museum Association.
MAR-JO HILLS QUARRIES
MAR-JO QUARRIES. Founded in 1956, the company in 1967 was located along Rockdale Road. The firm produced concrete stone, road surfacing materials, and agricultural limestone.
Directory of Dubuque Industries. Prepared by the Dubuque Industrial Bureau, 1967