The Beginning of the Third Principal Meridian - Cairo, IL
Posted by: 
YoSam.
N 36° 59.558 W 089° 09.480
16S E 307958 N 4096231
Along side US 51, just north of the Ohio River bridge and Fort Defiance, is this survey marker. There is also, a similar marker at the entrance to the fort just south of here.
Waymark Code: WM16X5Y
Location: Illinois, United States
Date Posted: 10/22/2022
Views: 1
County of marker: Alexander County
Location of marker: US 51, roadside turnout, N. of Fort Defiance
Marker text:
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.
"Must Sees"at this location":
Mississippi River & Ohio River confluence
Fort Site where Lewis & Clark practiced star-navigation
Crumbling town of Cairo
Date Waymark Created: 06/27/2014
Do they allow dogs at this location?: Yes
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Visit Instructions:
Visits only will be logged if there is a picture of the individual at the location, with their GPS in hand submitted as proof of the visit or not having a camera, the person making the find must submit a reasonable "proof" of having visited the site. Examples include: Two or three sentence quote from historical/interpretive signage at the location; adequate descriptive language about the location that provides evidence of a visit; verification by another party present at the find; e-mail sent from the location of the waymark.
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