Tri-State Marker

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The Tri-State-Marker is the place where Kansas, Oklahoma, and Missouri meet. More impressive is the manpower and time that it took to map the area in 1857. An astounding 800-man expedition spent half-a-year surveying just 40 miles. In 1938, a stack of stones was used to mark a spot that was thought to be the tri-state area but the location was erroneous. This mistake wasn't corrected until 2004 when the new plaque was set into the ground 50 feet east of the old monument.