Missouri River Commission BOLAND Jerry Penry
In 1948, surveyors from USC&GS found the monument and used it as a station in their own network. At this time, two reference marks were placed consisting of bronze disks in square concrete pads. It is unknown if the USC&GS surveyors actually checked to make sure that the surface monument was directly over the drill hole in the lower stone before accepting the center hole in the triangle of the cap. These heavy cast iron caps measure 5.5" diameter.
Triangulation Station
1889
December 25, 2015
Triangulation station "BOLAND" is located on a gently sloping pasture hill in Charles Mix County, South Dakota, and is approximately 3.5 miles from the nearest shore of the Missouri River. The name given for this station most likely comes from a local landowner named John Boland.
Location of "Boland". The Highway 44 bridge across the Missouri River is at upper left.
The station is 230 yards west of a dirt road.
The hill where the station is located as viewed from the road looking northwest.
Looking northeast over the monument.
The monument set flush with the ground.
Close up view of the 1889 cap.
View showing the pipe which sets upon an 18" square stone.
Reference Mark No. 1.
Reference Mark No. 1 bronze disk.
Reference Mark No. 2.
Reference Mark No.2 bronze disk.
© Jerry Penry 2015
