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1995 Midnite Mine Radiation Survey

Description: Abstract: During the week of September 4, 1995, personnel from the U.S. Bureau of Mines conducted a Ra-226 survey at the Midnite Mine. One hundred thirty measurements were made on a rectangular grid with 150-m spacings. Concurrently, Shepherd Miller, Inc., took gross gamma readings in gR/h at the same grid points. In addition, the USBM collected 17 soil samples to be analyzed for radium, thorium, and potassium. The results of this survey are summarized in this report.
Date: 1996
Creator: Stroud, William P. & Droullard, Robert F.
Item Type: Refine your search to only Report
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Application of Field Measurements and Computer Modeling to Evaluate Deep Mine Shaft Stability in Northern Idaho

Description: Abstract: Researchers at the U.S. Bureau of Mines have developed personal-computer-based data acquisition, instrumentation, and mine visualization and modeling techniques to evaluate a mine accessway in a deep hard-rock mine in northern Idaho. These techniques were applied to a mine shaft in a large silver mine that has been in operation for many years. A very deep, rectangular, timber-supported shaft extending to depths exceeding 2.3 km (7,500 ft) had been deforming continuously as a result of… more
Date: 1996
Creator: Beus, Michael J.; Orr, T. J. & Whyatt, J. K.
Item Type: Refine your search to only Report
open access

Beneficiation of Iron-Copper Ores from Kasaan Peninsula, Prince of Wales Island, Alaska

Description: Report issued by the Bureau of Mines over studies conducted on the beneficiation of iron-copper ores. As stated in the summary, "this report summarizes the results of laboratory testing of copper-bearing magnetite ore from the Poorman, Rush and Brown, and Copper Center deposits, Kasaan Peninsula, Prince of Wales Island, southeastern Alaska" (p. 1). This report includes tables, maps, and illustrations.
Date: February 1957
Creator: Wells, R. R.; Erspamer, E. G. & Sterling, F. T.
Item Type: Refine your search to only Report
open access

Beryl Mountain, Sullivan County, New Hampshire

Description: Report issued by the Bureau of Mines over exploration of mineral deposits on Beryl Mountain. As stated in the introduction, "testing by surface cuts, trenching, and tunneling was conducted by the Bureau of Mines from August to December 1943" (p. 1). This report includes maps.
Date: March 1948
Creator: Levin, S. B.
Item Type: Refine your search to only Report
open access

Bituminous-Coal Deposits in the Vicinity of Eska, Matanuska Valley Coal Field, Alaska

Description: Report of investigations issued by the U.S. Bureau of Mines on the estimated recoverable reserves of bituminous coal found in the Matanuska Valley Coal Field. The investigation includes studies of the area, and methods of mining which include diamond and churn drilling. This report includes maps, photographs, and illustrations.
Date: February 1952
Creator: Jolley, Theodore R.; Toenges, Albert L. & Turnbull, Louis A.
Item Type: Refine your search to only Report
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