Site No. JF00-072 is a

survey monument Survey markers, also called survey marks, survey monuments, or geodetic marks, are objects placed to mark key survey points on the Earth's surface. They are used in geodetic and land surveying. A ''benchmark'' is a type of survey marker that i ...

located at the

quadripoint A quadripoint is a point on Earth where four distinct territories meet. The territories can be of different types, such as national and provincial. In North America, several such places are commonly known as Four Corners. Several examples exist ...

Republic A republic () is a "state in which power rests with the people or their representatives; specifically a state without a monarchy" and also a "government, or system of government, of such a state." Previously, especially in the 17th and 18th c ...

and Washington counties in Kansas and

Jefferson Jefferson may refer to: Names * Jefferson (surname) * Jefferson (given name) People * Thomas Jefferson (1743–1826), third president of the United States * Jefferson (footballer, born 1970), full name Jefferson Tomaz de Souza, Brazilian foo ...

and

Thayer Thayer may refer to: Places ;United States * Thayer, Illinois * Thayer, Indiana * Thayer, Iowa * Thayer, Kansas * Thayer, Michigan * Thayer, Missouri * Thayer, Nebraska *Thayer, West Virginia * Thayer County, Nebraska * Thayer Street, Providence, ...

counties in Nebraska. The monument marks the intersection of the sixth principal meridian and its baseline, the

40th parallel north The 40th parallel north is a circle of latitude that is 40 degrees north of the Earth's equatorial plane. It crosses Europe, the Mediterranean Sea, Asia, the Pacific Ocean, North America, and the Atlantic Ocean. At this latitude the sun is vis ...

; it serves as the

initial point In surveying, an initial point is a datum (a specific point on the surface of the earth) that marks the beginning point for a cadastral survey. The initial point establishes a local geographic coordinate system for the surveys that refer to that ...

of all land surveys in Kansas and Nebraska, as well as most of Wyoming and Colorado, and part of South Dakota. The original sandstone monument was tall. U.S. Deputy Surveyor Charles A. Manners set the monument in 1856. The monument was later buried under a county roadbed; it was unearthed and reburied twice before being dug up for good in 1986, though its middle section is now missing. The monument was added to the National Register of Historic Places on June 19, 1987.

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Monuments and memorials on the National Register of Historic Places in Kansas Monuments and memorials on the National Register of Historic Places in Nebraska Buildings and structures completed in 1856 Buildings and structures in Washington County, Kansas Buildings and structures in Republic County, Kansas Buildings and structures in Jefferson County, Nebraska Buildings and structures in Thayer County, Nebraska National Register of Historic Places in Washington County, Kansas National Register of Historic Places in Republic County, Kansas Historic surveying landmarks in the United States Borders of Nebraska Borders of Kansas Boundary markers 1856 establishments in Kansas Territory 1856 establishments in Nebraska Territory {{Kansas-NRHP-stub

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