Report issued by the U.S. Bureau of Mines discussing metal mines in Colorado. As stated in the summary, "this paper describes the mineral deposits and discusses mining and milling methods and related operating conditions in an important gold, silver, lead, and zinc producing area in Ouray, San Juan, and San Miguel Counties, Colo., embracing 250 square miles" (p. 5). This report includes tables, maps, and illustrations.

From abstract: A reconnaissance radiometric survey of parts of the northwestern San Juan Mountains has revealed the occurrence of uranium-bearing ores in several mining districts in Ouray and San Juan Counties, and the occurrence of thorium-bearing veins in southwestern Gunnison County.

Photograph of the Beaumont Hotel in Ouray, Colorado. A few automobiles are parked in the street near the building. A man can be seen crossing the street. The Beaumont Hotel was built in 1886 and closed in 1964 for thirty years until it reopened in 2003.

Photograph of the Beaumont Hotel in Ouray, Colorado. A few automobiles are parked in the street near the building. The Beaumont Hotel was built in 1886 and closed in 1964 for thirty years until it reopened in 2003. Mountains are visible in the background.

Photograph of the Beaumont Hotel in Ouray, Colorado. A few automobiles are parked in the street near the building. The Beaumont Hotel was built in 1886 and closed in 1964 for thirty years until it reopened in 2003. Mountains are visible in the background.

Photograph of the Beaumont Hotel in Ouray, Colorado. A few automobiles are parked in the street near the building. The Beaumont Hotel was built in 1886 and closed in 1964 for thirty years until it reopened in 2003. Mountains are visible in the background.

Photograph of Carol, Pam, and Byrd Williams IV posing in front of a railroad car in Ouray, Colorado. They stand on the steps of the railroad car, one step below the other. This photograph was taken during a family trip to Colorado. The Beaumont Hotel can be seen in the background.