Ray J. Sylvester tremolite, near Dunsmuir, California

The Sylvester mine produced tremolite in Shasta County, California, according to the U.S. Bureau of Mines' Minerals Yearbook.^1,5 The yearbook for 1947 said that "Ray J. Sylvester of Mount Shasta produced tremolite in Shasta County near Dunsmuir," and in 1948 it listed him again among the county's tremolite producers.^1,2 For 1949 the yearbook reported that "production of tremolite in the Sylvester mine was reported by the Powhatan Mining Co." of Baltimore, and for 1950 that Powhatan "produced tremolite from the Sylvester mine near Hazel Creek in Shasta County," a different place name from the 1947 report.^3,4 In 1959 the yearbook said Ray Sylvester produced tremolite "from the Sylvester asbestos claim, Shasta County."⁵

The documents report this mine producing asbestos fiber for sale.⁴

Location

Year by year

Every statement about this mine in the documents, in each document's own words, by the year it is about.

1947

• Worked: “Ray J. Sylvester of Mount Shasta produced tremolite in Shasta County near Dunsmuir” (Ray J. Sylvester), p. 2¹

1948

• Worked: “production of tremolite was reported by ... Ray J. Sylvester of Mount Shasta” (Ray J. Sylvester), p. 2²

1949

• Worked: “production of tremolite in the Sylvester mine was reported by the Powhatan Mining Co.” (Powhatan Mining Co.), p. 2³

1950

• Worked: “produced tremolite from the Sylvester mine near Hazel Creek in Shasta County” (Powhatan Mining Co.), p. 2⁴

1959

• Worked: “Ray Sylvester ... tremolite from the Sylvester asbestos claim, Shasta County” (Ray Sylvester), p. 2⁵
• Fiber: “tremolite” (Ray Sylvester), p. 2⁵

Other names

Documents call this mine “Shasta County near Dunsmuir”, “Sylvester mine”, “Sylvester asbestos claim”.

See also

• Asbestos exposure sites in California
• All asbestos mines

References

1. Minerals Yearbook: Asbestos Chapters, 1947 (January 1, 1948), p. 2.
2. Minerals Yearbook: Asbestos Chapters, 1948 (January 1, 1949), p. 2.
3. Minerals Yearbook: Asbestos Chapters, 1949 (January 1, 1950), p. 2.
4. Minerals Yearbook: Asbestos Chapters, 1950 (January 1, 1951), p. 2.
5. Minerals Yearbook: Asbestos Chapters, 1959 (January 1, 1960), p. 2.