Montana meridian, Principal meridian survey point near Willow Creek, United States.
The Montana meridian is a survey reference point in Montana, United States. The initial monument sits on a limestone hill near Willow Creek and serves as the baseline from which all land surveys in the state are measured.
The meridian was established in 1867 as a baseline for the survey system. It received a brass marker cap in 1922 from the U.S. Land Office to serve as a permanent reference point.
The meridian represents a fundamental element of the Public Land Survey System that shaped land distribution patterns across Montana.
The site is reached through private ranch property, so advance permission is advisable before visiting. The limestone hill marking the location is easily visible once you reach the general area.
Unlike other principal meridians across the country, this location has no official name. It remains one of the lesser-documented survey monuments from the era of westward land division.
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