REMOVE

1. Ore
2. Warm Springs
3. Cherry Creek
4. Duddleson, T.J.

WHAT

1. GMO (1)
2. Greek American Mines Co. (1)
3. Operations (1)
4. Structures (1)

WHO

1. Backe, C.W. (1)
2. Cannon, L.G. (1)
3. Davidson, H.A. (1)
4. Durkee, R.S. (1)

WHEN

1. 1910s (1)