Today I made some high-resolution scans of the Boisberg, MN topo map
and scale so I could accurately measure the relationships between the
witness monument and the river, etc. The summary is:
The tri-point, as shown on the map, is 80 feet E of the monument.
The tri-point, as indicated on the monument (66 chains = 594 feet E
of the monument)is in the Bois de Sioux River.
The following link has been updated with this data and a copy of the
high-res scan I used is included:
http://www.bjbsoftware.com/corners/pointdetail.php3?point=58
BJB