Modoc Mine

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From the California Journal of Mines and Geology, Vol. 47, No. 1, Jan. 1951:

The Hearst Estate, San Francisco, California, owns 5 patented claims, the Modoc, Confidence, Lookout, Keyes, and Hearst, and 3 unpatented claims, the Colorado, Delta, and Valley View. The deposit and mine workings are fully described by Tucker and Sampson. No additional work was done on the property until 1944 when L.D. Foreman and Company, Salt Lake City, Utah, started shipping ore from slag and mine dumps. Smelter reports on these shipments show the following:

Slag dump:-Lead: 10%-Zinc: 10%-Silver: 4.8oz.
Mine Dump:-Lead: 11.07%-Zinc: 5.2%-Silver: 12.83%-Gold: 0.12oz.

Total shipments estimated at 15,000 tons, most of which was dump material. In 1947, an exploratory drift was started from the No. 2 tunnel, but no ore was found. The property is idle.


*W.B. Tucker and R.J. Sampson in an earlier 1938 publication.