-
Survey benchmark on Brighton Dam
-
Survey measuring point at Vienna Metro station
-
Survey point at Coles Run Reservoir [02]
-
Survey point at Coles Run Reservoir [01]
-
USGS benchmark at Etters Roxbury Store [01]
-
USGS benchmark at Etters Roxbury Store [03]
-
USGS benchmark at Etters Roxbury Store [02]
-
USGS benchmark at Etters Roxbury Store [04]