8 Mile Corner, Survey marker sculpture at state borders intersection, Oklahoma, United States
The 8 Mile Corner features a metal manhole cover with markings indicating the meeting point of Kansas, Colorado, and Oklahoma state boundaries.
Established in 1990 by the Bureau of Land Management, this marker replaced an original 1903 monument that served as a reference point for travelers.
The marker represents the connection between three different state territories, each with its own distinct regional identity and administrative jurisdiction.
Visitors need to contact road departments of all three states to access the monument, which sits below road level under a steel protective cover.
The Department of the Interior cadastral survey disk, set in concrete beneath the marker, forms an integral part of the Federal Base Network.
Location: Oklahoma
Operator: Bureau of Land Management
GPS coordinates: 36.99307,-102.04213
Latest update: March 25, 2025 02:35
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