March H, 1959
Mr. Ban Hestetune,
Oliver Iron Mining,
Tou called last week about the possibility of breasting eastward
from the present 25th Level Shaft Teln stops into the 651 area below
23rd Level. Tou mentioned that this stops is now 37" below 23rd level
and that its eastern end is at approximately 275# coordinate.
I am enclosing a map showing the probable extent of 6§i ore below
23rd level, at an elevation of -977- ^is ®ap i» based on cross sections
constructed from stope maps above 23rd level, and from the map of 23*d
The indicated width of ore ranges from about h* to ll1. If the present
stope is extended to the east, an S-to-9 foo% width should be encountered
at 225W coordinate, or about $0* east of where they are now. The ore then
narrows to about 5 «r f £®«t until 1S0W coordinate is reached. IVom 1S0W
to 1*>W the ore indicated Is B to 11 feet thick except for a thinner zone
It may be worth drilling test holes from available crosscuts on 23rd
level at 105^ s»& 100W. If the crosscut at 100W is used, the hole should
be directed as close to Due Horth as possible in order to intereect the better
width of ore below the level. Angling the holes down at -50° may allow the
drill rig to stay clear of the main drift. If the south crosscut at 220W
is available, it may be a better substitute for the one at 1&5W.
Regarding the proposed hole at the west end of 22nd Level, a direction
of H. 50° V. would be best, with the collar as close to the centerline of
the drift as possible.
Hope this will be of some help.
cc: S. M. Holmes