Encyclopedia Dubuque
"Encyclopedia Dubuque is the online authority for all things Dubuque, written by the people who know the city best.”
Marshall Cohen—researcher and producer, CNN
Affiliated with the Local History Network of the State Historical Society of Iowa, and the Iowa Museum Association.
GROTIELOCH
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GROTIELOCH. A vast swamp that once existed in northern Dubuque, "Grotoeloch" was formed by springs that constantly flowed down the hills in the area of present-day Diagonal Street. The waters were blocked by the slightly higher ground along Jackson Street. Spreading over the level ground, the waters created a stagnant slough that caused White Street to end in the late 1800s at 24th Street.
