The Bob Marshall wilderness has been the scene of some prospecting activity but no development or production. The only patented claim is located in Teton County on the Sun River just above Gibson Reservoir but the primary reported activity was on the McDermitt Creek placer.
BOUNDARIES OF THE DISTRICT
No references to the Bob Marshall Wilderness or the mines within the area have been located in historical mining sources.
A U.S. Geological Survey report (1978) has the only information concerning district boundaries found in the mining literature. A map of the area shows placer claims on streams in a remote mountainous region that includes portions of Lewis and Clark, Powell, Flathead, Missoula, Lake, Pondera and Glacier counties. The area is one of the most remote and inaccessible wilderness areas in Montana. The only placers in the Bob Marshall district as defined by the AMRB (1994) within the bounds of Powell County are those on McDermitt Creek (Figure 1).
HISTORIES OF SELECTED MINES
McDermitt Creek Placer
The McDermitt Creek placer is located in section 24, T16N, R11W. The mine was developed by a 42 foot long adit, a small pit and an other adit that was caved when observed. The mine worked malachite in argillite and quartzite. There is no information regarding the period of development of the mine (USGS 1978).
Abandoned Mine Reclamation Bureau (AMRB)
1994 Mining districts of Montana. Maps 1:100,000 and Map #94-NRIS-129. Compiled and edited by Joel Chavez. Prepared by Montana State Library Natural Resource Information System (NRIS) for Montana Department of State Lands. Helena
United States Geological Survey and U. S. Bureau of Mines
1978 "Mineral Resources of the Bob Marshall Wilderness and Study Areas, Lewis and Clark, Teton, Pondera, Flathead, Lake, Missoula, and Powell Counties, Montana", Open file Report 78-295. Unedited and unreviewed preliminary report.