Montana Meridian

The Montana Meridian extends north and south from the initial monument on the summit of a limestone hill, 800 feet (244 meters) high, longitude 110° 38' 50" west from Greenwich, and, with the base line on the parallel of 45° 46' 48" north latitude, governs the surveys in the state of Montana. The initial point lies near Willow Creek, Montana.

Source

• Raymond, William Galt (1914) (via Google Books). Plane Surveying for Use in the Classroom and Field. New York: American Book Company. http://books.google.com/books?id=68I3AAAAMAAJ&dq.