Brett Whaley:
Minnesota Society of Professional Surveyors Marker
Brett Whaley:
U.S. and Canada Boundary Marker
Brett Whaley:
Split Rock Geodetic Marker
Brett Whaley:
U.S. Coast and Geodetic Survey Marker
Brett Whaley:
U.S. Geodetic Survey marker
Brett Whaley:
Geodetic Survey Marker
Brett Whaley:
Devil's Tower Geodetic Marker
Brett Whaley:
Geodetic Survey Marker on top of Scotts Bluff
Brett Whaley:
Scotts Bluff Survey Marker
Brett Whaley:
Scotts Bluff Survey Marker