Download or read book The East Leadville Mining Co written by East Leadville Mining Company and published by . This book was released on 1883 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Catalpa Mining Company of Leadville Colorado written by Catalpa Mining Company and published by . This book was released on 1880 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Leadville Colorado written by J. L. Loomis and published by . This book was released on 1879 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Leadville Drainage Tunnel Lake County Colo written by Robert A. Elgin and published by . This book was released on 1949 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Leadville mining district (fig. 1) covers approximately 8 square miles adjacent to Leadville, the county seat of Lake County, Colo. It is famous for its large production of rich ores containing zinc, lead, copper, gold, and silver. Some manganiferous ores also have been produced. Most of the ore bodies have been devloped and mined through shafts, and large columes of water have greatly impeded operations and necessitated continual pumping. As the mines reached greater depths, pumping costs increased vastly. When depressed metal prices or labor strikes curtailed operations at various times, the mines became flodded, and costly pumping and rehabilitation were necessary to permit production to resume. All operations ceased in 1933, and the district has remained flooded ever since, except in that part drained by the Yak tunnel. Tunnels to drain all or parts of the district were proposed at various times. A tunnel from Malta was proposed as early as 1892 but never driven. The Yak tunnel (fig. 2), started in 1895 for exploration and drainage purposes, proved so successful that it extended into the eastern part of the district a total length of over 4 miles. The Canterbury tunnel (fig. 2) was started in 1922 and driven over 4,000 feet eastward into Canterbury Hill as a community project. A tunnel 39,300 feet in length and deep enough to drain all the district was proposed as a W.P.A. project in 1934, but was rejected. The Resurrection Mining Co. considered driving a tunnel from the valley of the East Fork of the Arkansas River into Fryer Hill in 1937. Shortages of metals, particularly lead and zinc, resulting from vastly increased consumption for the war, induced intensive exploration from all possible resources. A survey of reserves by the War Production Board resulted in designation of the Leadville district as one of the domestic reserves that could make a notable contribution of lead, zinc, and manganese if the mines were unwatered and rehabilitated within a reasonable time. Unwatering could be done by pumping or by driving a tunnel, but a tunnel would have the advantages of providing continual drainage, access for exploration and development of ore bodies, and possible cheaper haulage. From a study of available information at a conference in Denver on November 11 and 12, 1943, and a field examination in Leadville on November 13 and 14, representatives of the War Production Board, Bureau of Mines, and Geological Survey, concluded that a 2-1/2-mile tunnel driven from a portal on the East Fork of the Arkansas River, about 1-1/2 miles north of the town of Leadville, at an elevation of 9,960 feet, would effectively drain the Fryer Hill, Carbonate Hill, and Iron Hill areas (figs. 2 and 3). A 6,000-foot lateral into the downtown area would provide for pumping at greatly reduced heads there. These four extensively mineralized areas have yielded more than two-thirds of the total production of the Leadville district. Deeper tunnels to drain all of the district completely would be of much greater length and would require a proportionately greater expense and longer time to complete. The Colorado district, western region, of the Bureau of Mines was given the responsibility of making a preliminary surveys for a route and preparing a report. Construction of a tunnel at an estimated cost of $1,348,000 was recommended. The Interior Appropriations Act of 1943 authorized the expenditure of $1,400,000 for construction of a drainage tunnel with laterals, 17,300 feet in total length. Necessary steps prior to construction included obtaining easement rights for the tunnel route by court action and portal rights by negotiation with the Resurrection Mining Co., drawing up a form of contract for construction, and obtaining endorsements of the procedures of the United States Attorney General and the United States Comptroller General. Furthermore, in accordance with a ruling of the Secretary of the Interior that the United States Government take appropriate measures to obtain contributions from the beneficiaries of the project commensurate with the benefits received therefrom, the Department of the Interior negotiated with property owners for the collection of royalties on minerals made accessible, produced, and sold as a result of the drainage program. A cost-plus-fixed-fee contract was negotiated with Stiers Brothers Construction Co. of St. Louis, Mo., an experienced tunnel contractor. Construction work was begun December 6, 1943. Underground conditions proved to be much worse than had been anticipated and were responsible for the extremely high cost of driving the tunnel. Funds were exhausted after 6,600 feet of tunnel was completed, and operations were recessed on August 27, 1945. Most of the equipment had been rented from a subcontractor, the John R. Austin Construction Co., and was removed when the rental contracts were terminated. Equipment necessary to maintain the tunnel was procured, and a small crew was retained for this purpose. A description of the Leadville district follows, particularly of the effect of ground water upon mining, the geology, and planning and driving of the tunnel. The surface-plant and mining equipment are described, and detailed costs of the project to date are tabulated. Appendix 1 comprises the history of driving operations and Appendix 2 embraces the personnel organization and the contractor's wage scale.
Download or read book Report written by Colorado. Bureau of Mines and published by . This book was released on 1922 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report of the Commissioner written by and published by . This book was released on 1927 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1925, Financial report included in 1926.
Download or read book Annual Report for the Year written by and published by . This book was released on 1927 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Summary of Mineral Industry Activity in Colorado written by and published by . This book was released on 1922 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geology and Ore Deposits of the Leadville Mining District Colorado written by Samuel Franklin Emmons and published by . This book was released on 1927 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Colorado Directory of Mines written by Thomas B. Corbett and published by . This book was released on 1879 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Mining Reports written by Robert Stewart Morrison and published by . This book was released on 1903 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Digging Gold Among the Rockies written by George Thomas Ingham and published by . This book was released on 1888 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Not all that glitters is gold," warns George Thomas Ingham in Digging Gold Among the Rockies, a Colorado and Dakota mining book for both the casual reader and hardcore mining historian. As a Deputy Mineral Surveyor for the United States during the late 1800s who was involved daily with the technical aspects of mining, Ingham infuses this book with a wealth of facts and a truly colorful history that defined the mining industry of the time. Digging Gold Among the Rockies provides a brief history of the discovery of gold and silver in the eastern United States and California, but quickly claims the Colorado Rockies and the Black Hills of the Dakotas as its primary focus. In this fascinating book, Ingham explains the differences between placer and lode mining and the equipment used for each. He writes about the first discoveries, early mining laws, mine locations, mining terms, towns that sprang-up in the mining areas, and the contagious boomtown atmosphere that was everywhere. He explains the "salting of mines," warns of robbers and thieves and the dangers of gambling and drinking, and also includes short biographies of some of the mining "giants" of his era. Yet, even with mining being central to this work, Ingham still takes the time to describe the pleasures he experienced while hunting in the mountains and fishing in the area's clear, rushing streams."--Goodreads.com.
Download or read book Finding Gold in Colorado Prospector s Edition written by Kevin Singel and published by Createspace Independent Publishing Platform. This book was released on 2018-05-26 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Travel guide book inspired by the gold prospecting origin of Colorado. Includes touring information on all the major towns founded as gold mining camps as well as summaries of each town's origin story. Includes reviews and recommendations on historic districts to visit, mines to tour, driving tours of ghost towns and places to gold pan. Includes information on 16 historic districts, 31 museums, 18 mines, 186 gold panning sites across the state of Colorado. Thoroughly researched to confirm public access to the panning sites (no private property or areas subject to mining claim has been included - unlike other books.)Written by a long-time Colorado resident and gold prospector. Based on years of research and field work.Get your share of the gold by prospecting for it in historic, urban, and remote locations across the gold districts of Colorado.
Download or read book Abstract of a Report Upon the Geology and Mining Industry of Leadville Lake Co Colorado written by Samuel Franklin Emmons and published by . This book was released on 1855 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mining American written by and published by . This book was released on 1904 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Napoleon Mining Co written by Napoleon Mining Co and published by . This book was released on 1890 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book United States Courts of Appeals Reports written by United States. Courts of Appeals and published by . This book was released on 1896 with total page 874 pages. Available in PDF, EPUB and Kindle. Book excerpt:
