Illinois–Indiana State Line Boundary Marker

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Historic site in Indiana, United States

Illinois-Indiana State Line Boundary Marker
Illinois-Indiana State Line Boundary Marker
Location	Chicago, Illinois/Hammond, Indiana, United States
Coordinates	41°42′28″N 87°31′28″W / 41.707842°N 87.524471°W / 41.707842; -87.524471
Built	1838

Chicago Landmark
Designated	September 4, 2002

The Illinois–Indiana State Line Boundary Marker is a sandstone boundary marker obelisk located near the end of Chicago's Avenue G, just west of the State Line Generating Plant of Hammond, Indiana. Since 1988 it has been 159.359 miles (256.463 km) north of the Wabash River.

The obelisk was constructed by the Office of the United States Surveyor General ca. 1838. In 1988, the marker was relocated 191.09 feet (58.24 m) north of its original location, but the structure continues to straddle the state line between Illinois and Indiana. As one of the earliest structures still standing in Chicago, the marker earned Chicago Landmark status on September 4, 2002.

References

Illinois-Indiana State Line Boundary Marker, City of Chicago Department of Planning and Development, Landmarks Division (2003). Retrieved on 18 February 2010.

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