7/3/2013
This is the wall running along the SW edge of the operation. The visibility of this wall above the surface partly determined the extent of the operation.
Top elevations (from WSDA1 datum 1):
W side, high rock (top course): 2138.43
W side, low rock (second course?): -44.0 cm
Center:
S side:
Its lowest elevation, measured in the center, is 2136.95 m ASL.