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U.S. Historic Survey Stones and Monuments
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Description:
This category is for non-disk monuments located in the United States whose position was established by surveying.
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Image for C D 2view gallery

SESE22.2 km

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U.S. Historic Survey Stones and MonumentsC D 2

in U.S. Historic Survey Stones and Monuments

Found in Cook County forest preserve.

posted by: Groundspeak Regular Member Team Fawlty

location: Illinois

date approved: 8/18/2006

last visited: 12/19/2009

Image for Number One City Datum - Chicago, ILview gallery

EE38.1 km

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U.S. Historic Survey Stones and MonumentsNumber One City Datum - Chicago, IL

in U.S. Historic Survey Stones and Monuments

Marker for the primary datum for the City of Chicago, the point from which all the heights in the City of Chicago are measured. Located at the NW corner of La Salle & Monroe on the Northern Trust bank headquarters, 50 S La Salle.

posted by: Groundspeak Premium Member adgorn

location: Illinois

date approved: 4/22/2008

last visited: 10/20/2014

Image for Illinois-Indiana State Line Boundary Markerview gallery

EE50.1 km

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U.S. Historic Survey Stones and MonumentsIllinois-Indiana State Line Boundary Marker

in U.S. Historic Survey Stones and Monuments

The northern boundary marker on the Illinois-Indiana State Line.

posted by: Groundspeak Premium Member Shorelander

location: Illinois

date approved: 4/26/2010

last visited: 10/21/2018

Premium Member Downloads: download.GPX Lite File       download.LOC File       download .KML File (Google Earth)