Encyclopedia Dubuque
"Encyclopedia Dubuque is the online authority for all things Dubuque, written by the people who know the city best.” —Marshall Cohen, CNN
Affiliated with the Local History Network of the State Historical Society of Iowa, and the Iowa Museum Association
MACADAM
MACADAM. A once popular road-surfacing material made of crushed rock and oil. The surface was used first on Iowa Street in the late 1800s.


