Statistics of Mines and Mining in the States and Territories West of the Rock Mountains

Drift west , Oakes & Reese vein , $ 30 per foot . 3. Drift south , blue lead , $ 25 per foot . Thus it will be seen that in these three contracts the mine owners save as follows : 1. Sinking 50 - foot shaft , at $ 30 . $ 1,500 00 2.

Statistics of Mines and Mining in the States and Territories West of the Rock Mountains


Statistics of Mines and Mining in the States and Territories West of the Rocky Mountains

It may here just as well be mentioned that the " rim - rock " on the eastern side of Table Mountain is a great deal higher than the " rim - rock " on the western or valley side , and that the plateau of Table Mountain itself has a ...

Statistics of Mines and Mining in the States and Territories West of the Rocky Mountains


The Mining Magazine

MF J107, MF J162 FN J36, Supps. Jan. 25, Apr. 24 Western Areas Gold Mining Co. Supps. Jan. 25, Apr. 24, MF J283, ME J348 Western Deep Levels M J27, FN J34. MF J108, FN J188, MF J281. ME J283, FN J327, Supp. Apr. 24 West Driefontein Co.

The Mining Magazine


Statistics of Mines and Mining in the States and Territories West of the Rocky Mountains Being the 1st 8th Annual Report of Rossiter W Raymond U S Commissioner of Mining Statistics

The western extension of the Gold Hill mine is owned by Chandler & Co. , who have a tunnel in some 40 feet on the ledge . The vein is from 1 to 3 feet wide , and contains good ore , giving upward of $ 30 per ton in the mill .

Statistics of Mines and Mining in the States and Territories West of the Rocky Mountains  Being the  1st 8th  Annual Report of Rossiter W  Raymond  U S  Commissioner of Mining Statistics


Costs of Strip Mine Reclamation in the West

The performance standards of the act and all subsequent reclamation programs for mining on Federal land will be ... By contrast , reclamation laws and standards of other Western States seem less stringent than the new Federal law and ...

Costs of Strip Mine Reclamation in the West


Surface Subsidence Over a Room and pillar Mine in the Western United States

both the third- and fourth - west panels had been retreated . The average mining height in this area was 7 ft ; the maximum subsidence was approximately 16 pct of the mining height . This lack of subsidence indicates that the support ...

Surface Subsidence Over a Room and pillar Mine in the Western United States

This report summarizes the results from the subsidence research study completed by the U.S. Bureau of Mines at the Roadside Mine, Powderhorn Coal Co., Palisade, Co. This research was conducted from February 1981 to August 1985, with additional data obtained during July 1991, to evaluate residual subsidence. The Bureau studied subsidence at three district room-and-pillar sections at separate locations over the mine and determined the maximum subsidence values and surface subsidence profiles for each mining section. Maximum subsidence of 3.0 ft occurred over the room-andpillar sections, with overburden depths ranging from 50 to 600 ft. Surface tension cracks had occurred, and were still evident during the residual subsidence survey.

Evaluation of the environmental effects of western surface coal mining

Land Use Although there are many different uses of western land , the premining land use for almost all of the land that has been or is being mined in the west is grazing of cattle , sheep , and horses . This is a desirable feature from ...

Evaluation of the environmental effects of western surface coal mining


Thick seam Mining in the Western United States geological Considerations

Western thick seams often have a high susceptibility for spontaneous combustion , A main reason for this susceptibility is the presence of coal remaining in the section during or after mining . The process of spontaneous combustion is ...

Thick seam Mining in the Western United States  geological Considerations


The Mining Journal Annual Review

Welkom Gold Mining Wesselton Mine in West African Portland Cement West Driefontein Gold Mines West Rand Consolidated Mines 33 , 39 , 51 , West Rand Investment Trust . West Vlakfontein Gold Mining West Witwatersrand Areas Western ...

The Mining Journal  Annual Review


Environmental Effects of Western Coal Surface Mining

The Edna Coal Mine and the recipient stream , Trout Creek , were chosen for study on the following bases . The mine operation is such that a gradation of aged ( weathered ) to new spoils could impact the stream as it progresses along ...

Environmental Effects of Western Coal Surface Mining


The Mining and Smelting Magazine

Although the bottom levels in West Seton are comparatively poor, the rich ore-ground having cut out at the 110, the prospects of the mine remaining a permanently profitable one are not seriously impaired. The great resources of this ...

The Mining and Smelting Magazine


Western Energy Company s Rosebud Mine Area D

Before beginning to mine , Western Energy would dewater the pit by pumping the water sediment ponds . During dewatering , maximum inflows to the pit from the Rosebud coal would be about 80 gallons per minute ( gpm ) .

Western Energy Company s Rosebud Mine  Area D


Gold Rushes and Mining Camps of the Early American West

... Salt Lake City 66 Old prospector The Romance of Mining by T. A. Rickard 67 Assay Office author Recorder's Office Idaho Historical Society , Boise 68 " On the Road to Pike's Peak ” Denver Public Library , Western History Collection ...

Gold Rushes and Mining Camps of the Early American West

Distributed by the University of Nebraska Press for Caxton Press Vardis Fisher and Opal Laurel Holmes bring together the stories of all of the remarkable men and women and all of the violent contrasts that made up one of the most entrhalling chapters in American history. Fisher, a respected scholar and versatile creative writer, devoted three years to the writing of this book.

Interim Report Relating to the Gold mining Industry of Western Australia

£87,000 Since the fire the Company has spent the following :— Cost of keeping mine unwatered and protection of underground ... The management in October, 1925, placed before the Minister for Mines of Western Australia a well-considered ...

Interim Report Relating to the Gold mining Industry of Western Australia


Western Energy Company Rosebud Mine Area C Block 1

1966 , Western Energy , a wholly owned subsidiary of MPC , was formed to manage and develop the properties . In 1968 , Western Energy began mining the coal of the Rosebud seam adjacent to Northern Pacific's old workings in an area ...

Western Energy Company Rosebud Mine Area C  Block 1


Graymont Western Inc Indian Creek Mine Expansion

Dolomite is sometimes used as a flux for smelting of iron and steel . public land identified in the Proposed Action is reasonably incident to the Project in accordance with 43 CFR 3715 - Use and Occupancy under the Mining Laws .

Graymont Western  Inc  Indian Creek Mine Expansion


Multislice Mining for Thick Western Coal Seams

Thick western coal seams may be more prone to spontaneous combustion than thinner eastern seams . Mining underneath a spontaneous combustion heating in the upper slice gob would be extremely hazardous . Additionally , allowing time for ...

Multislice Mining for Thick Western Coal Seams


Undercut Block caving Method of Mining in Western Copper Mines

INFORMATION CIRCULAR DEPARTMENT OF COMMERCE -- BUREAU_OF_MINES UNDERCUT BLOCK - CAVING METHOD OF MINING IN WESTERN COPPER MINES 1 By E. D. Gardner 2 INTRODUCTION This paper is a progress report on the study of mining methods and costs ...

Undercut Block caving Method of Mining in Western Copper Mines