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Home arrow Illinois arrow Alexander County arrow The Beginning of the Third Principal Meridian IL149
The Beginning of the Third Principal Meridian IL149 Print E-mail
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Picture courtesy of Jim Kuntz

The beginning of the third principal meridian is located in the Ohio River, 1,810 feet directly north of this point. In November, 1803, this was the mouth of the Ohio River. At this location, the Lewis and Clark Corps of Discovery encamped for six days.

Illinois Survey Society.
US-51, žmile S. of Cairo, Alexander County Illinois
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