Colorado School Of Mine
Colorado Department of Personnel & Administration (DPA) Division of Information Technologies (DoIT)
School ... Historic Mine Report Files ... Lookout Mountain School for Boys ... [Read More]
Colorado Department of Personnel & Administration (DPA) Division of Information Technologies (DoIT)
On April 17, 2002, Colorado Governor Bill Owens signed a bill passed by the General Assembly designating the Rhodochrosite as the new state mineral. While there was some debate as to whether the state mineral should be gold or silver or another mined mineral historically associated with Colorado, it was decided that the deep red to rose pink manganeze carbonate (MnCO3) mineral, Rhodochrosite, is associated internationally with the state more than any other mineral. It is found in some gold and silver ore-bearing veins. The specimen at left is the world's largest Rhodochrosite crystal, called the Alma King, which is on display at the Denver Museum of Nature and Science. It was found in the Sweet Home Mine near Alma (Park County), Colorado. ... [Read More]
Rebuild Colorado - News
Governor Owens Recognizes Colorado Association of School ... Budget Squeeze? Find a Gold Mine in Your Utility Budget ... Mapleton School District Opens With A Cool Start ... [Read More]
Colorado Department of Personnel & Administration (DPA) Division of Information Technologies (DoIT)
Crowley County Superintendent of Schools Teaching Certificates Endorsed ... School ... Mineral County ... [Read More]
Colorado Department of Personnel & Administration (DPA) Division of Information Technologies (DoIT)
1860 A.D. Rich placer discoveries cause stampede of miners to California Gulch on present site of Leadville. First schoolhouse is built at Boulder. Region continues to be administered variously by Jefferson Territory officials, and Miners' and People's Courts. ... 1914 A.D. Strike of coal miners in southern Colorado fields is climaxed by "Battle of Ludlow" near Trinidad; several men, women and children killed during hostilities between miners and the State militia. August: WWI begins. ... [Read More]
Governor Bill Owens
Coal Mine Board of Examiners ... School of Mines, Board of Trustees of the Colorado ... Mines, Board of Trustees of the Colroado School of ... [Read More]
On-Line Update of OFR 95-23, The Summitville Mine...
Gray and others, 1994b). Prior to mineralization, the volcanicdome rocks that host the deposit were intensely altered by highly acidicvolcanic gas condensates. Sulfide-rich mineral assemblages containingpyrite, enargite, chalcopyrite, and other minerals were subsequentlydeposited in the altered host rocks by hydrothermal fluids. Open-pitmining exposed large volumes of previously unoxidized sulfides toweathering. Acid-mine drainage with high concentrations of metals formsby the reactions of these previously unoxidized sulfides with oxygenatedgroundwaters. Further, the highly altered host rocks have very littlecapacity to react with and consume the acid generated by sulfideoxidation, thereby providing little or no mitigation of the aciddrainage. Evaporation further increases the concentrations of acid andmetals in waters draining mine dumps and open-pit waters. Soluble saltssuch as chalcanthite (a copper sulfate), jarosite (a potassium-ironsulfate), and halotrichite (an iron-aluminum su ... [Read More]
ATSDR - PHA - SUMMITVILLE MINE, SUMMITVILLE (DEL NORTE), RIO GRANDE COUNTY, COLORADO
Connolly SJ, et al. Mineralogical alterations of soil Irrigated with acidic minewater in the Alamosa River Basin. In: Geological Society of America field guide,hydrogeology of the San Luis Valley and environmental issues downstream fromthe Summitville Mine. 1996 Oct. ... EPA is controlling cyanide and metals in the heap-leach pad and the release of water from thesite. Contractors have plugged the major adits, removed and relocated mine waste to the minepit, and reclaimed mine areas. ... [Read More]
Colorado Governor James Peabody
By 1903, the Western Federation of Miners was well entrenched in the miningareas and strove to extend its membership. At Cripple Creek in Teller County,Federation members held most of the political offices including sheriff. Mostnon-union miners had been driven out. The mine employers were intent, however,in their refusal to recognize the legitimacy of the union. Denying completelythe concept of collective bargaining, the mine owners insisted that theirworking relationships with the miners was based on individual contracts. For theunion, the ultimate weapon opposing this policy was the strike which wassupposed to force the owners into negotiation. The mine owners countered thestrikes by employing non-union workers. They believed that if union men lefttheir jobs then other workers would be glad to replace them, which would thenforce the union to disintegrate. ... [Read More]
Colorful Colorado History Page
The first collegiate football game played in Colorado was between the Colorado School of Mines and Colorado College. ... 1877 - Ouray County - The Virginia Mine in the Mt. Sneffels miningdistrict was the first mine in Colorado to use electricity for lightingpurposes. ... First Black American school principal in the state, Jessie Whaley Maxwell, was appointed to Whittier Elementary. ... [Read More]
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