19:
1339:. Gold production fell as miners left Colorado to enlist as soldiers during the Civil War. In addition, much of the gold that was on the surface or easy to attain had been exploited, so miners had to sink mine shafts and change their methods for mining for complex refractory ores. This resulted in an end of the Pike's Peak Gold Rush.
1581:
north of the
Arkansas River near a tributary running from a mountain, which he described "a rivulet whose waters rolled down gold dust." His map, however, was "clouded with so much doubt and uncertainty, that no dependence could be placed upon it", according to Antonio de Alcedo and George Alexander
1448:
Among the discoveries in 1859, George A. Jackson's discovery of pay placer gold on South Clear Creek, later called
Chicago Creek, was an important gold discovery in Colorado, which helped fuel further participation in the Pike's Peak Gold Rush. Discoveries continued in other locations in the current
1913:
An estimate of this rush and counter-rush has placed the number of gold-seekers who set out from the
Missouri River during the entire spring of 1859 at 100,000. Probably 50,000 of these reached the end of their journey. And at least 25,000 of those who arrived at the Cherry Creek settlement were so
640:
A fifteen-month strike, precipitated by firing of workers identified as union members and mine owners calling for state intervention, continued into 1904 and resulted in explosions that killed non-union workers, violence, deaths due to unsafe equipment, mine owners "jockeying" for control, and
550:
G.F. Loughlin described the value of zinc in 1915 as an "extraordinarily high price", which resulted in a 30% increase in the overall value of metals that year in
Colorado. Lake County, for instance, saw more than a doubling of the value of zinc sold in 1915 from the previous year, even though
1199:
Tellurium was discovered in
Colorado on Boulder County's Gold Hill in the Red Cloud Mine. The tellurium belt through the Gold Hill, Sugar Loaf, Magnolia, and Sunshine districts of Boulder County is 3 to 6 miles (4.8 to 9.7 km) wide and 15 to 20 miles (24 to 32 km) long.
292:
created the 15-year Grand
Junction Remedial Action Plan in 1972 to clean up sites, like the Climax mill and a total of 594 buildings, that were contaminated during uranium processing. Realizing the implications at other uranium sites in the country, Congress then passed the
569:(1913–14) began when about 12,000 coal miners when on strike in Ludlow on September 23. Some of the workers were forced from their home and established a tent city, and 26 people were killed on April 20, 1914, at the makeshift settlement by agents of the coal mine owners.
1449:
state of
Colorado throughout the year. There were also as many people who returned to their homes the first half of 1859—frustrated by the effort, Indian attacks, and reports of a starved group that resorted to cannibalism—as those who tried to find gold in earnest.
1398:"Rich gold placers" were found in August and September 1859 along Georgia Gulch in what is now Breckenridge, Summit County. Summit County is Colorado's top placer gold producer, most of it coming from the southern Tenmile and Breckenridge districts.
720:
The first mill for radioactive metals was built on La Sal Creek by
Charles Poulot and Charles Voilleque. It produced 15,000 pounds of uranium oxide and then closed in 1902. One year later Western Refining Company operated the mill until 1904.
380:
has purchased property, staked claims, and acquired mineral rights at Iron Hill, which
Bradley S. Van Gosen of the US Geological Survey says it is believed to be "the largest known resources of titanium and niobium in the United States."
1220:) identified in the United States was found at the Wood gold mine in Central City. For several years, small amounts of high quality uranium were taken as a byproduct from gold mining at the Kirk and Wood gold mines on Quartz Hill.
2851:
1434:'s North Fork. When news of the find spread, the population of Gregory increased to 10,000 from 15 in one month and the summer saw of flood of "Pikes Peak or Bust" gold seekers across the plains for Rocky Mountain settlements.
1282:
Silver was first discovered at the headwaters of South Clear Creek on
Glacier mountain at the Coaley claim. This location is one mile south the current town of Montezuma in Summit County. The silver had a high lead content.
139:
The only working underground mine in Colorado in 2008 was the Cash mine, built in 1872, at Gold Hill in Boulder County. Each ton of ore yields about .75 ounce of gold at the mine, which daily extracts about 50 tons of ore.
1011:
in July, 1882 was instrumental in the effective production and shipment of coal from the Franceville Mine. It became the first coal mine that was "worked to any extent", according to Colorado's state coal-mine inspector.
1851:
states that 1863 is the first reliably reported date for commercial coal mining in Colorado. He speculates that residents may have been taking coal from the surface since 1859 when the area was settled. The
1075:
began after a large deposits of silver was found in Leadville, which was one of the first boom towns. This led to another surge in the territory's population, aided by railroad service. For instance,
1561:
recorded in his journal that James Pursley or Purcell had shown him some gold nuggets in Santa Fe, New Mexico that Purcell said that he found in South Park. Pike, though, questioned the finding.
1331:
Within Gilpin County, there are trials of multiple mining methods, including use of chemicals, fire, steam and other crushers. Events in 1861 affected gold mining production: the outbreak of the
125:
The price of uranium dropped between 2007 and 2009. In 2009 it cost more per pound to mine the uranium than it could be sold for and, as a result, the last working uranium mine closed that year.
228:, the country's largest molybdenum mine, was put on care and maintenance status for years. After a long shutdown, the Climax mine reopened and resumed shipment of molybdenum on May 10, 2012.
248:'s Cresson Mine and by 2003 had produced 1.62 million gold ounces. The Cripple Creek district has been the largest producer of gold in the state, with more than 22 million ounces mined.
806:
was discovered in western Montrose County, Colorado in late 1897 or early 1898 and named by Charles Poulet, who built an 1899 mill in the McIntyre mining district of San Miguel County.
2035:
1151:
A copper reverberatory furnace was installed by the Mount Lincoln Smelting Works at the Dudley Smelter in Park County in August to produce copper matte. It ran until January 25, 1874.
4577:
1986:
1297:
The placers near Leadville were exhausted within four years. In April 1860, one of the richest discoveries of Colorado placer gold was discovered at California Gulch, the site of
1874:
Clark, Gruber and Company is the only commercial bank until then and since to issue its own coins. The United States government purchased the Denver establishment in April 1862.
1377:
Austin Clark, Milton Clark, and Emanuel H. Gruber first minted gold coins, many patterned after federal issues, from their Denver bank and assay office beginning July 1860.
1789:
1493:
William Green Russell outfitted in Leavenworth, Kansas and led a group of prospectors, including Cherokee Native Americans, that found gold near Little Dry Creek of the
706:
Cripple Creek produced more than $ 18 million (equivalent to $ 659,232,000 in 2023) in gold, which was more than 2/3 of the gold production for Colorado that year.
938:
Leadville produced almost one half of the Colorado's metals from carbonate ore for the year, valued at a $ 12,072,967.81 (equivalent to $ 409,407,753 in 2023).
1784:
1262:
The first paying silver mine, the Belmont lode, was found 8 miles (13 km) above Georgetown on McClellan Mountain, by Robert Layton, James Huff, and Governor
4470:
The Geographical and Historical Dictionary of America and the West Indies: Containing an Entire Translation of the Spanish Work of Colonel Don Antonio de Alcedo
311:
The Schwartzwalder uranium mine, built in 1953, closed in 2000 after producing a total of 17 million pounds of uranium. Contamination was discovered in 2007.
297:, which resulted in the clean-up of nine mills in Colorado, including other Grand Junction area mills, Durango, Rifle, Maybell, Naturita, and Gunnison mills.
612:
Standard Chemical Company started producing vanadium and radium in 1910 in Paradox Valley at the Jim Dandy mine, which initiated a radium boom in Colorado.
171:
Out of 30 states that produce coal, Colorado was the sixth largest producer of coal in the country. In 2010, Colorado was the eleventh largest producer.
1808:
The Sunday Complex, West Sunday, Sunday/St. Jude, and Topaz uranium mines were in operation between 2007 and 2009, but all were closed by or in 2009.
4623:
2769:
2060:
4618:
1962:"A Socioeconomic Analysis of the Impact of the Proposed Piñon Ridge Uranium Project on Western Mesa, Montrose, and San Miguel Counties, Colorado"
1315:
Joseph W. Marshall, owner the Consolidated Coal Company, operated the first commercial coal mine in Marshall, near Boulder, beginning in 1863.
641:
intervention by the military. For instance, the mining camp at Dunnville was captured by a trainload of soldiers that defeated union miners.
108:
2282:
2852:
Guide to Assessing Historic Radium, Uranium, and Vanadium Mining Resources in Montrose and San Miguel Counties, Colorado (OMB No.1024-0018)
4534:
294:
1234:
Boston & Chicago Smelting Company built an experimental smelter in June 1867 in Black Hawk, which was operational in January 1868.
972:
Zinc, an undesirable byproduct of mining other ores, was first recovered in Colorado in 1885 in Clear Creek, Summit and Lake counties.
472:, six unarmed Colorado Fuel and Iron Company miners were killed and dozens more were injured by ex-state policemen using machine guns.
398:
was first identified by Thomas W. Stern of the US Geological Survey in February 1951 in the Gateway district at the La Sal No. 2 Mine.
2036:"The History and Performance of Vertical Well Solution Mining of Nahcolite (NaHCO3) in the Piceance Basin, Northwestern Colorado, USA"
1356:
1943:
3836:
3829:
958:
in September 1886 between the Seven Mile and Elk Horn creeks. This resulted in a rush of miners to the area along Manhattan Creek.
1856:
book states that William A. Kitchens discovered coal in Marshall in 1859 and sold the property to James Marshall in the mid-1860s.
4140:
857:
1701:
Pueblo's Mineral Palace was completed with "a ceiling formed of 28 domes specimens of all the minerals produced in the State."
4608:
3042:
1961:
1668:
1076:
533:
350:
4426:
4349:
4301:
4207:
4180:
4121:
4094:
4046:
3990:
3695:
3599:
3552:
3519:
3336:
3309:
3232:
3110:
3003:
2740:
2713:
2598:
2542:
2470:
2440:
2413:
2266:
2122:
1099:
mining labor organization in Colorado was formed by Erie coal miners. Mining labor unions continued to be formed thereafter.
626:
Colorado City's Golden Cycle Mill—considered to be a modern, well-equipment plant—processed Cripple Creek ore economically.
1687:
1865:
It cost $ 100,000 (equivalent to $ 3,391,111 in 2023) to build the ditches to transport the water about twelve miles.
595:
496:
Radium Company of Colorado was one of the "world's foremost producers of radium" until a richer grade of radium from the
267:
245:
2171:
2878:
Report of Proceedings of the American Mining Congress: Sixteenth Annual Session, Philadelphia, Pa., October 20-24, 1913
2354:
2283:
Summary Report 1954-1959: Raw Materials Development Laboratory, Winchester, Massachusetts and Grand Junction, Colorado
4020:
820:
Cripple Creek ores were processed through a new Colorado-Philadelphia chlorination mill installed at Colorado City.
2198:
659:
sent troops to Colorado City in 1903 to settle a miner's strike. They set up Camp Peabody at what became the 1903
1008:
864:
sent in the militia to maintain peace—after several deputies and strikers were killed—and to mediate bargaining.
413:
2590:
Disasters, Accidents, and Crises in American History: A Reference Guide to the Nation's Most Catastrophic Events
3963:
3938:
3898:
2636:
1574:
910:
experienced mining booms. One year later, Cripple Creek had the largest gold discovery in the state's history.
536:, which killed 121 miners in Las Animas County on April 27, was the worst mine disaster in Colorado's history.
1117:, which led to construction of a smelter that year, and soon after the founding of the town named Leadville.
2009:
1835:
4613:
3632:
2462:
A Century of X-Rays and Radioactivity in Medicine: With Emphasis on Photographic Records of the Early Years
839:
4628:
2138:
2089:
1724:
1578:
1466:
835:
1544:
mapping expedition of the West, but "the spot is unmarked and was unheralded." See 1874 Lake City item.
1266:
on September 14. This led to a rush to mine silver in the Argentine district over the next three years.
1779:
1430:
On May 6, John H. Gregory discovered the first lode vein at Gregory Diggings", now in Central City, on
38:
1248:
Silver-lead deposits were found in 1866 in Georgetown, in 1874 in Leadville, and about 1880 in Aspen.
1030:
on Roc Creek, near the town of Uranium. Western Colorado is the country's oldest uranium mining area.
1774:
1497:. Author Caroline Bancroft states that Green was the "greatest single cause of the Pikes Peak Rush."
1134:
591:
219:
185:
34:
3435:
Geological Survey (U.S.) (1910). "Colorado Springs Coal Field, Colorado: Developments and Markets".
2959:
3874:
T. S. Lovering & E. N. Goddard (1950), "Geology and Ore Deposits of the Front Range Colorado",
1749:
1519:
1474:
1263:
1162:
760:
340:
203:
3489:
2784:
1620:
The Dakota Group formed with coal deposits east of the Rocky Mountains, such as the modern Denver
3807:
1769:
1764:
1350:
1326:
664:
469:
239:
42:
30:
4486:"Structural Control of the Gold Deposits of the Cripple Creek District, Teller County, Colorado"
3544:
3442:
2920:
2882:
2614:
2112:
2033:
3023:
2588:
2534:
1741:
1460:
1431:
1176:
955:
656:
566:
289:
60:(COMB) is a large area of the state had gold/silver booms. Outside of the UMB & COMB, the
4561:
4510:
4468:
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4253:
4197:
4036:
3858:
3784:
3474:
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3133:
2993:
2974:
2813:
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2730:
2701:
2682:
2487:
2430:
2256:
4339:
4324:
4276:
4170:
4111:
4084:
3980:
3712:
3685:
3616:
3589:
3569:
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3203:
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3153:
3100:
3078:
2935:
2832:
2509:
2460:
2403:
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2307:
2231:
1745:
1683:
689:
441:
326:
57:
4416:
4375:
4291:
4010:
3767:
3729:
3170:
924:
Gold was discovered in Cripple Creek, which resulted in rapid growth of mining in the area.
4538:
3378:
1831:
1515:
1172:
1072:
754:
357:
processed 2000 tons of North/South Dakota lignites, confirming their "reserve of uranium".
4143:. Arthur Lakes Library, Colorado School of Mines, Colorado School of Mines. Archived from
2800:
Colorado's War on Militant Unionism, James H. Peabody and the Western Federation of Miners
2347:
1301:. Another rich discovery was made at McNulty Gulch along the headwaters of Tenmile Creek.
64:
produced small amounts of gold, and the Cripple Creek district had a different gold boom.
8:
4443:
3370:
2914:
1893:
1605:
created during the Miocene age is the source of most gold in the Cripple Creek district.
1488:
1277:
1128:
990:
949:
782:
738:
668:
660:
346:
3801:
3382:
3537:
3394:
3272:
2947:
2876:
2750:
2527:
1901:
1494:
1336:
1332:
1298:
861:
4537:. Lifetime Legacies Productions and San Luis Valley Museum Association. Archived from
4144:
3717:. Denver: Collier & Cleaveland Lithograph Company, State Printers. pp. 21–22.
3436:
1541:
1473:. The gold findings were unsatisfactory and the settlement was abandoned in 1859. The
4422:
4345:
4297:
4270:
4203:
4176:
4117:
4090:
4042:
4016:
3986:
3959:
3934:
3894:
3691:
3655:
3595:
3548:
3515:
3398:
3332:
3305:
3228:
3127:
3106:
2999:
2736:
2709:
2594:
2538:
2466:
2436:
2409:
2384:
2262:
2118:
2054:
778:
449:
417:
4318:
3050:
2728:
551:
production was reduced from 78,763,334 pounds in 1914 to 72,493,170 pounds in 1915.
4012:
Regulating Danger: The Struggle for Mine Safety in the Rocky Mountain Coal Industry
3505:
3386:
1897:
1849:
Regulating Danger: The Struggle for Mine Safety in the Rocky Mountain Coal Industry
1735:
1651:
1360:
1180:
1114:
1096:
1027:
907:
515:
463:
435:
271:
263:
2662:"History of Uranium Prospecting and Mining in Colorado—a Story of Boom and Bust".
878:
The first chlorination plant for the district's ore was erected by Edward Holden.
741:, Boulder County. In 1910, 1,221 tons of tungsten was produced in Boulder County.
448:, which was published in 1941, to have become "the largest steel mill west of the
2897:
594:
was founded in 1913 and its Denver plant began production in June 1914. It was a
574:
2374:
2199:"History of Uranium Prospecting and Mining in Colorado—a Story of Boom and Bust"
3490:
Jerome G. Morse; David H. Hebb; M. S. Curtin, Colorado School of Mines (1977).
2913:
Frank Lee Hess; Waldemar Theodore Schaller (1914). "Geography and Production".
2492:
Mineralogic Classification of Uranium-vanadium Deposits of the Colorado Plateau
2174:. State of Colorado Department of Public Health and Environment. September 2005
1090:
421:
354:
153:
104:
4483:
3390:
2940:
Environmental Geology of the Front Range Urban Corridor and Vicinity, Colorado
2786:
Proceedings of the ... Annual Convention of the United Mine Workers of America
2488:"Geology of Uranium Deposits in Triassic Rocks of the Colorado Plateau Region"
2034:
Max Ramey, American Soda; Michael Hardy, Agapito Associates, Inc (Fall 2004).
1817:
The former National Radium Institute and Superfund site, is now occupied by a
424:). There were also mills at Uravan and Durango that were used by the project.
158:
American Soda pilot project that mined via fracturing ended after 3.75 years.
4602:
4485:
3539:
The Making of Western Labor Radicalism: Denver's Organized Workers, 1878-1905
3210:. Passenger Department of the Colorado Midland Railway. 1888. pp. 38–39.
2388:
1686:
purchased the Lulu City, Colorado mining settlement, which was placed on the
1511:
497:
2732:
The Colorado Labor Wars: Cripple Creek 1903-1904, A Centennial Commemoration
2562:
1522:, South Platte River, and Cherry Creek. The party continued to California's
1477:
began as other prospecting parties looked for gold at other Colorado sites.
500:
made it difficult to compete. Radium mines were closed in Colorado in 1923.
274:
order by the state government concerned with metal levels in water run-off.
4224:
1558:
1523:
663:. Old Colorado City was the location of a 1903 labor strike that spread to
61:
4466:
3621:. Washington, D.C.: Government Printing Office. pp. 10, 76, 189, 190.
2563:"US Geological Survey Bulletin 681: The Oxidized Zinc Ores from Leadville"
1656:
The mining portion of the Creede Underground Mining Museum was completed.
1355:
A consolidated ditch was completed in July 1860 that delivered water from
1043:
Colorado's first labor strike required intervention by the state militia.
3683:
3125:
2401:
1382:
1168:
860:. A key bargaining issue was creation of an eight-hour-workday. Governor
856:
Workers of the Western Federation of Miners went on strike, creating the
371:
225:
3914:
Ben H. Parker Jr. (October 1974). "Colorado School of Mines Quarterly".
2912:
1540:
Gold was said to be found near the present Lake City by a member of the
416:
acquired 54 acres (22 ha) at Grand Junction for a refinery for the
56:
The Uravan Mineral Belt (UMB) is on the west side of the state, and the
18:
4232:
Geological Survey Professional Paper 610, US Department of the Interior
2814:"The Occurrence of Bauxite in Colorado and Wyoming and its Utilization"
1818:
1712:
National Mining Exposition ("Industrial Exposition") opened in Denver.
214:
4377:
Mining in Colorado: a history of discovery, development and production
3769:
Mining in Colorado: a history of discovery, development and production
3618:
Mining in Colorado: a history of discovery, development and production
3571:
Mining in Colorado: a history of discovery, development and production
3355:
Mining in Colorado: a history of discovery, development and production
3189:
Mining in Colorado: a history of discovery, development and production
3155:
Mining in Colorado: a history of discovery, development and production
3080:
Mining in Colorado: a history of discovery, development and production
2899:
Mining in Colorado: a history of discovery, development and production
2511:
Mining in Colorado: a history of discovery, development and production
1133:
Enos Hotchkiss found a gold lode, originally called Golden Fleece, in
892:
In 1892, 3,110 tons of manganiferous iron was shipped from Leadville.
3828:
Spurr, Josiah Edward; Garrey, George H.; Ball, Sydney Hobart (1908).
3591:
Colorado Traveler - Colorado Ghost Towns: Remnants of the Mining Days
3208:
From Plains to Peaks: A Hand-book for Tourists in the Rocky Mountains
2621:. Washington, D.C.: U.S. Government Printing Office. 1916. p. 8.
2313:. US Geological Survey, US Department of the Interior. pp. 2, 23
1987:"US Uranium Mining and Exploration: US Nuclear Fuel Cycle Appendix 1"
1217:
1191:
803:
786:
477:
395:
148:
50:
3710:
3455:
2182:– via Colorado State Publications Library Digital Repository.
1923:
According to Henderson, the year may have been 1849, 1850, or 1852.
1465:
Montana City was established north of the site of the 1857 find by
1413:
986:
729:
365:
4195:
3663:
US Geological Survey, Bulletin 2163, US Department of the Interior
2933:
2375:
Educational Foundation for Nuclear Science, Inc. (February 1948).
1949:. United States Environmental Protection Agency. October 26, 2014.
3129:
Geology and Gold Deposits of the Cripple Creek District, Colorado
2975:"Radium, Uranium, and Vanadium Deposits of Southwestern Colorado"
2494:. Washington, D.C.: U.S. Government Printing Office. p. 127.
2007:
1667:
The Museum of the West was incorporated and was renamed the 1972
1602:
1598:
1587:
685:
452:" and "the largest single industrial establishment in Colorado".
95:
2942:. Washington, D.C.: U.S. Government Printing Office. p. 41.
2706:
Encyclopedia of U.S. Labor and Working-class History: G-N; Index
2110:
3893:. Missoula: Mountain Press Publishing Company. pp. 60–61.
3731:
Bedrock Geology of the Coventry Center Quadrangle, Rhode Island
1959:
1610:
1470:
1359:
to Russell Gulch, south of Central City, along two ditches for
1171:
was discovered in the Crystal River Valley and was used in the
749:
488:
377:
46:
4512:
Annual Report of the United States Geological and Geographical
3656:"Colorado Yule Marble: Building Stone of the Lincoln Memorial"
3476:
Radium, Uranium and Vanadium Deposits of Southwestern Colorado
3371:"On minerals of the cryolite group recently found in Colorado"
2782:
2232:"Water providers raise alert over uranium pollution from mine"
1896:. Legally, lands in the present state of Colorado were in the
4234:. Washington D.C.: US Government Printing Office. p. 116
3250:
2729:
Tim Blevins, Chris Nicholl, and Calvin P. Otto, eds. (2006).
2381:
Bulletin of the Atomic Scientists: Science and Public Affairs
1412:
On July 5, J. D. Peregrine installed the first water powered
206:
produced quality diamonds up to 26 carats beginning in 1996.
4289:
4275:. Colorado State Office, Bureau of Land Management. p.
4222:
3098:
2902:. Washington, D.C.: Government Printing Office. p. 250.
1944:"Pinon Ridge Uranium Mill Rad NESHAPs Construction Approval"
4491:. Washington D.C.: US Government Printing Office. p. 5
3958:. Missoula: Mountain Press Publishing Company. p. 24.
3933:. Missoula: Mountain Press Publishing Company. p. 23.
3873:
3192:. Washington, D.C.: Government Printing Office. p. 76.
3083:. Washington, D.C.: Government Printing Office. p. 12.
2529:
Homicide, Race, and Justice in the American West, 1880-1920
2514:. Washington, D.C.: Government Printing Office. p. 16.
1026:
Tom Talbert discovered the yellow uranium-vanadiaum of the
777:
Ten tons of a particularly rich shipment of carnotite (15%
4272:
Frontier in Transition: A History of Southwestern Colorado
4199:
Heritage Numismatic Auctions US Coin Auction Catalog #1117
4168:
4038:
Walking Into Colorado's Past: 50 Front Range History Hikes
3714:
Report of E. Le Neve Foster, the State Geologist, Colorado
2261:. Oxford University Press. 9 September 2011. p. 266.
1854:
Walking Into Colorado's Past: 50 Front Range History Hikes
1740:
Territorial School of Mines construction began in 1870 by
4373:
4225:"Principal Gold-Producing Districts of the United States"
3765:
3614:
3567:
3351:
3185:
3151:
3076:
2895:
2507:
1137:
near Lake City. The mine was in production for 50 years.
4258:. Mining Reporter Publishing Company. 1902. p. 160.
3434:
2874:
2383:. Educational Foundation for Nuclear Science, Inc.: 88.
1914:
discouraged that they returned home after a brief stay."
1892:
Soon after, the area became part of the self-proclaimed
4484:
A. H. Koschmann, US Department of the Interior (1949).
4196:
Heritage Numismatic Auctions, Inc. (1 September 2008).
3665:. US Government Printing Office. pp. 8, 30, 38, 44
1601:
rock of pre-Cambrian gneiss, schist, and granite in a
1179:, and the outer facade, columns and upper steps of the
3856:
3782:
3417:
4467:
Antonio de Alcedo; George Alexander Thompson (1814).
3799:
3534:
3421:
On the Mesozoic and Cenozoic Paleontology of 186ornia
2114:
Minerals Yearbook, 2007, V. 2, Area Reports, Domestic
1883:
It was also called "claim no. 5 on the Gregory lode".
4389:
4387:
4268:
3786:
Professional Paper - United States Geological Survey
3727:
3684:
William Crowley Kelly; Edwin Newell Goddard (1969).
3126:
Waldemar Lindgren; Frederick Leslie Ransome (1906).
2524:
2305:
3803:
Preliminary report on the lead and zinc of Oklahoma
3472:
3459:
Contributions to the Geology of Uranium and Thorium
3049:(Report). London: Uranium Institute. Archived from
2981:. Economic Geology Publishing Company. p. 509.
2586:
2008:Nick Sutcliffe; Brenden, Harrington (Spring 2008).
1960:Thomas M. Power; Donovan S. Power (December 2010).
688:was reported to have been recently discovered near
4369:
4367:
4365:
4363:
4361:
4316:
3761:
3536:
3227:. University of Oklahoma Press. pp. 130–131.
3147:
3145:
3143:
3072:
3070:
3021:
2820:. Mining Reporter Publishing Company. p. 190.
2526:
2503:
2501:
2172:"Summitville Mine Superfund Site Five-Year Review"
1744:, an Episcopal Bishop. It was sold in 1874 to the
1514:, and other Cherokee prospectors, en route to the
4384:
4082:
3913:
3882:
3759:
3757:
3755:
3753:
3751:
3749:
3747:
3745:
3743:
3741:
3583:
3581:
3094:
3092:
3090:
2699:
2634:
2111:U. S. Department of the Interior (January 2011).
518:'s 400-ton molybdenum mill went into production.
4600:
4563:The United States: With an Excursion Into Mexico
4135:
4133:
4041:. Big Earth Publishing. 2006. pp. 101–102.
3504:
2991:
2402:Best Books on; Federal Writers' Project (1941).
29:is a chronology of precious metal mining (e.g.,
4414:
4358:
4008:
3827:
3789:. U.S. Government Printing Office. p. 161.
3653:
3561:
3462:. U.S. Government Printing Office. p. 244.
3424:. U.S. Government Printing Office. p. 259.
3368:
3140:
3067:
2670:(2). Colorado Geological Survey: 24. Fall 2006.
2498:
2041:. Solution Mining Research Institute. p. 1
1057:Molybdenum was discovered in 1879 near Climax.
763:formation, near Perry Park, beginning in 1898.
246:Cripple Creek & Victory Gold Mining Company
4410:
4408:
4164:
4162:
3978:
3830:Geology of the Georgetown Quadrangle, Colorado
3738:
3635:. U.S. National Park Service. January 17, 2015
3578:
3479:. Eames brothers, state printers. p. 151.
3456:Lincoln Ridler Page; Harriet B. Smith (1956).
3324:
3297:
3291:
3246:
3244:
3168:
3087:
2830:
2789:. United Mine Workers of America. p. 277.
2689:. International Textbook Company. p. 422.
2568:. Washington, D.C.: Government Printing Office
2428:
2331:
2308:"The Iron Hill (Powderhorn) Carbonite Complex"
2152:(2). Colorado Geological Survey: 4. April 2003
842:unsuccessfully attempted to get higher wages.
4582:Western History/Genealogy Digital Collections
4559:
4310:
4202:. Heritage Capital Corporation. p. 390.
4130:
4109:
3823:
3821:
3819:
3817:
3734:. U.S. Government Printing Office. p. 6.
3690:. Geological Society of America. p. 66.
3587:
3511:Encyclopedia of Politics of the American West
3220:
2934:Wallace R. Hansen; Eleanor J. Crosby (1982).
2702:"Cripple Creek Strikes: The 1903-1904 strike"
2560:
2432:Workers in America: A Historical Encyclopedia
2084:
2082:
2080:
2078:
2076:
2074:
2072:
2070:
4418:Central City and Gilpin County: Then and Now
4337:
4262:
4223:A.H. Koschman & M.H. Bergendahl (1968).
4116:. Heritage House Publishing Co. p. 23.
4078:
4004:
4002:
3953:
3928:
3888:
3878:, US Government Printing Office, p. 123
3876:US Geological Survey, Professional Paper 223
3711:Colorado. Office of State Geologist (1885).
3251:Kenneth Jessen, Correspondent (March 2005).
2916:Colorado ferberite and the wolframite series
2735:. Pikes Peak Library District. p. 109.
2229:
2193:
2191:
2189:
2117:. Government Printing Office. pp. 8–2.
2059:: CS1 maint: multiple names: authors list (
107:near Bedrock, Colorado, was approved by the
49:, marble), and rare earth mining (titanium,
4405:
4159:
4076:
4074:
4072:
4070:
4068:
4066:
4064:
4062:
4060:
4058:
4015:. University of Nebraska Press. p. 4.
3806:. Co-operative publishing company. p.
3241:
3132:. U.S. Government Printing Office. p.
2972:
2680:
2556:
2554:
2336:. University of Colorado Press. p. 54.
785:) was made from the Copper Prince claim on
295:Uranium Mill Tailings Radiation Control Act
3814:
3687:Telluride Ores of Boulder County, Colorado
3438:Bulletin - United States Geological Survey
2708:. Taylor & Francis. pp. 329–330.
2655:
2485:
2212:(2). Colorado Geological Survey. Fall 2006
2067:
1989:. World Nuclear Association. November 2014
244:Large-scale open pit gold mining began at
4296:. Oxford University Press. pp. 7–8.
3999:
3574:. Government Printing Office. p. 10.
3358:. Government Printing Office. p. 82.
3158:. Government Printing Office. p. 11.
3043:Early Uranium Mining in the United States
3017:
3015:
2839:. Industrial Reporter Company. p. 2.
2768:CS1 maint: multiple names: authors list (
2458:
2186:
4435:
4055:
3837:United States Government Printing Office
3772:. Government Printing Office. p. 9.
3543:. University of Illinois Press. p.
3369:Cross, C. W.; Hillebrand, W. F. (1883).
3119:
3022:Thomas F.V. Curran (December 20, 1913).
2615:"Formation of National Radium Institute"
2551:
2454:
2452:
1518:panned small amounts of gold in June at
325:The aluminum beer can was introduced by
188:, the Black Cloud Mine, closed in 1999.
17:
4624:Industrial history of the United States
4449:(Report). State Mineral Resources Board
4441:
4401:. Review of Reviews. 1906. p. 337.
4290:Dale Oesterle; Richard Collins (2011).
4155:– via Heritage West, Item #79271.
4086:Colorful Colorado: Its Dramatic History
3594:. American Traveler Press. p. 33.
3253:"Manhattan: Poudre Canyon's ghost town"
3105:. Oxford University Press. p. 21.
3099:Dale Oesterle; Richard Collins (2011).
2936:"Igneous and Metamorphic Rocks: Gypsum"
2811:
2783:United Mine Workers of America (1907).
2533:. University of Arizona Press. p.
1669:Western Museum of Mining & Industry
1626:
1469:and was the first settlement of modern
954:A "rich strike" was discovered west of
737:Ores containing tungsten were found in
4619:History of mining in the United States
4601:
4399:The American Monthly Review of Reviews
4380:. Government Print. Office. p. 8.
3514:. SAGE Publications. pp. 76, 81.
3494:. Colorado School of Mines. p. 8.
3214:
3030:. Western & Company. p. 1165.
3012:
2919:. Government Printing Office. p.
2849:
2630:
2628:
2405:Colorado, a Guide to the Highest State
1416:at Gregory Diggings, near Black Hawk.
1077:Denver and Rio Grande Western Railroad
969:Clear Creek, Summit and Lake counties
534:Victor American Hastings Mine Disaster
446:Colorado, a Guide to the Highest State
351:United States Atomic Energy Commission
45:), building material quarrying (iron,
4175:. The History Press. pp. 55–59.
3224:Colorado Ghost Towns and Mining Camps
3040:
3034:
2995:Mining and Selling Radium and Uranium
2992:Roger F. Robison (December 1, 2014).
2802:, George G. Suggs, Jr., 1972, page 47
2593:. Infobase Publishing. p. 1914.
2449:
103:The Pinon Ridge Mill construction in
4578:"Search: National Mining Exposition"
4395:"Gold Discoveries and Their Results"
4083:Caroline Bancroft (1 January 1959).
2881:. American Mining Congress. p.
2643:. US Environmental Protection Agency
1688:National Register of Historic Places
858:Cripple Creek miners' strike of 1894
4341:The University of Denver: A History
4169:Elizabeth Victoria Wallace (2011).
4141:"Hydraulic mining in Russell Gulch"
2831:Eugene Parsons (January 12, 1918).
2664:Colorado Geological Survey Rocktalk
2625:
2377:"Bulletin of the Atomic Scientists"
1830:In honor of French mining engineer
13:
4535:"Creede Underground Mining Museum"
4374:Charles William Henderson (1926).
3985:. Arcadia Publishing. p. 28.
3979:Mona Lambrecht (5 November 2008).
3766:Charles William Henderson (1926).
3615:Charles William Henderson (1926).
3568:Charles William Henderson (1926).
3492:Colorado Energy Resources Handbook
3352:Charles William Henderson (1926).
3304:. James La Force. pp. 20–21.
3186:Charles William Henderson (1926).
3172:The Trail: A Magazine for Colorado
3152:Charles William Henderson (1926).
3077:Charles William Henderson (1926).
3047:Fourteenth International Symposium
2896:Charles William Henderson (1926).
2635:Rebecca J. Thomas (January 1999).
2508:Charles William Henderson (1926).
2355:United States Department of Energy
989:was discovered by October 1882 at
14:
4640:
4344:. The History Press. p. 26.
2973:R.C. Coffin; et al. (1922).
2875:American Mining Congress (1914).
4570:
4553:
4527:
4503:
4477:
4460:
4331:
4283:
3916:Gold Placers of Colorado, Book 2
3328:Glen Echo, Rustic, and Manhattan
3301:Glen Echo, Rustic, and Manhattan
3221:Sandra Dallas (1 January 1988).
3204:"Leadville: Mining and Smelting"
2348:"Grand Junction, Colorado, Site"
1917:
1907:
1886:
1877:
759:Gypsum has been quarried in the
67:
4293:The Colorado State Constitution
4246:
4216:
4189:
4103:
4029:
3972:
3947:
3922:
3907:
3867:
3857:Ovando James Hollister (1867).
3850:
3793:
3783:U.S. Geological Survey (1917).
3776:
3721:
3704:
3677:
3647:
3633:"Lincoln Memorial Construction"
3625:
3608:
3528:
3498:
3483:
3466:
3449:
3428:
3418:Charles Abiathar White (1885).
3411:
3362:
3345:
3318:
3196:
3179:
3162:
3102:The Colorado State Constitution
2985:
2966:
2927:
2906:
2889:
2868:
2843:
2824:
2805:
2793:
2776:
2722:
2693:
2674:
2641:Superfund Redevelopment Program
2607:
2580:
2518:
2479:
2422:
2395:
2368:
2340:
2325:
2299:
2275:
2249:
2223:
2164:
1868:
1859:
1841:
1824:
1811:
1009:Denver and New Orleans Railroad
838:by a local organization of the
199:State Line Kimberlite District
109:Environmental Protection Agency
3800:Luther Crocker Snider (1912).
3535:David Thomas Brundage (1994).
3331:. James La Force. p. 21.
3028:Engineering and Mining Journal
2683:"Cyaniding Cripple Creek Ores"
2619:Bureau of Mines - Bulletin 102
2435:. ABC-CLIO. pp. 155–156.
2131:
2104:
2027:
2001:
1979:
1953:
1936:
1802:
1575:Antoine-Simon Le Page du Pratz
1:
4609:Timelines of Colorado history
3728:George Emerson Moore (1963).
3054:(web transcript w/o graphics)
3041:Hahne, F J (September 1989).
2525:Clare Vernon McKanna (1997).
2408:. Best Books on. p. 75.
2306:Bradley S. Van Gosen (2009).
2230:Bruce Finley (May 20, 2010).
1930:
1579:map depicted a source of gold
184:The last working mine in the
4473:. J. Carpenter. p. 316.
4338:Steve Fisher (20 May 2014).
3473:Reuben Clare Coffin (1921).
2850:Twitty, Eric (March 1992) .
2587:Ballard C. Campbell (2008).
2459:R.F Mould (1 January 1993).
2288:(Report). September 30, 1959
2258:The Oxford Companion to Beer
2092:. Colorado Geological Survey
1727:formed (incorporated 1897).
840:Western Federation of Miners
353:(A.E.C.) Compound along the
7:
4566:. K. Baedeker. p. 532.
4421:. Caxton Press. p. 2.
4317:Wilbur Fiske Stone (1918).
3918:. Vol. 69. p. 17.
3375:American Journal of Science
1847:James Whiteside, author of
1758:
1725:Colorado Mining Association
10:
4645:
4442:Dickman, Edward D (1954).
3588:Carolyn Bauer (May 1987).
2700:Elizabeth Jameson (2007).
1836:Marie François Sadi Carnot
1780:Uranium mining in Colorado
1212:Central City-Idaho Springs
1079:was in Leadville by 1880.
667:and eventually led to the
37:), fuel extraction (e.g.,
4269:Paul M. O'Rourke (1980).
3863:. S. Bowles. p. 252.
3391:10.2475/ajs.s3-26.154.271
3175:. W.C. Bishop. p. 9.
2998:. Springer. p. 125.
2704:. In Eric Arnesen (ed.).
2465:. CRC Press. p. 41.
1790:purple mining in Colorado
1775:Silver mining in Colorado
950:Manhattan Mining District
903:Cripple Creek and Creede
592:National Radium Institute
186:Leadville mining district
4444:Colorado Lead-Zinc Mines
4415:Robert L. Brown (1994).
4323:. S. J. Clarke. p.
4172:Hidden History of Denver
4089:. Big Earth Publishing.
4009:James Whiteside (1990).
3654:Elaine S. McGee (1999).
3377:. s3-26 (154): 271–294.
2014:Colorado School of Mines
1795:
1750:Colorado School of Mines
1409:Central City-Black Hawk
1335:and the creation of the
1264:Robert Williamson Steele
836:Leadville Miners' Strike
308:Ralston Buttes District
204:Kelsey Lake Diamond Mine
4584:. Denver Public Library
3325:James La Force (2012).
3298:James La Force (2012).
3169:Will C. Bishop (1913).
2833:"The Mines of Colorado"
2429:Robert E. Weir (2013).
2332:Kathleen BruĂżn (1955).
2010:"Hard Rock Gold Mining"
1770:Gold mining in Colorado
1765:Coal mining in Colorado
1216:The first pitchblende (
906:Both Cripple Creek and
470:Columbine Mine massacre
442:open-hearth steel plant
27:Colorado mining history
4560:Karl Baedeker (1904).
4110:Garnet Basque (2012).
3441:. The Survey. p.
3259:. Wellington, Colorado
2857:(Report). p. E-19
2561:G.F. Loughlin (1918).
1785:pig mining in Colorado
1742:George Maxwell Randall
1177:Colorado State Capitol
1007:The completion of the
657:James Hamilton Peabody
567:Colorado Coalfield War
290:United States Congress
23:
3954:S.M. Voynick (1992).
3929:S.M. Voynick (1992).
3889:S.M. Voynick (1992).
3860:The Mines of Colorado
2637:"Denver Radium Study"
1746:Territory of Colorado
1684:National Park Service
1555:South Park districts
1475:Pike's Peak Gold Rush
1467:William Green Russell
690:Buena Vista, Colorado
111:on October 26, 2011.
58:Colorado Mineral Belt
22:Colorado Mineral Belt
21:
4113:Gold Panner's Manual
2681:F.L. Barker (1908).
1902:Nebraska Territories
1834:or French president
1832:Marie-Adolphe Carnot
1627:Mining organizations
1516:California Gold Rush
1173:Tomb of the Unknowns
1073:Colorado Silver Boom
270:) was served with a
4614:History of Colorado
4541:on February 2, 2015
4515:. Vol. 8. 1876
4320:History of Colorado
4147:on January 19, 2015
3982:Boulder:: 1859-1919
3383:1883AmJS...26..271C
2837:The Mining American
2486:W.I. Finch (1957).
1894:Jefferson Territory
1633:
1175:soldier memorials,
783:triuranium octoxide
669:Colorado Labor Wars
347:Climax Uranium Mill
345:The Grand Junction
74:
4629:Mining in Colorado
3283:has generic name (
2761:has generic name (
1631:
1582:Thompson in 1814.
1495:South Platte River
1337:Colorado Territory
1113:Lead was found in
993:near Pike's Peak.
862:Davis Hanson Waite
661:Colorado Labor War
652:Old Colorado City
378:DuPont Corporation
259:Rio Grande County
72:
39:mining for uranium
24:
4447:(official survey)
4428:978-0-87004-363-5
4351:978-1-62584-811-6
4303:978-0-19-977884-3
4209:978-1-59967-296-0
4182:978-1-60949-350-9
4123:978-1-927051-37-5
4096:978-0-933472-13-6
4048:978-1-56579-519-8
3992:978-1-4396-2070-0
3697:978-0-8137-1109-6
3601:978-1-55838-067-7
3554:978-0-252-02075-9
3521:978-1-4522-7606-9
3338:978-1-257-94155-1
3311:978-1-257-94155-1
3234:978-0-8061-2084-3
3112:978-0-19-977884-3
3005:978-3-319-11830-7
2742:978-1-56735-223-8
2715:978-0-415-96826-3
2687:Colliery Engineer
2600:978-1-4381-3012-5
2544:978-0-8165-1708-4
2472:978-0-7503-0224-1
2442:978-1-59884-718-5
2415:978-1-62376-006-9
2268:978-0-19-991210-0
2124:978-1-4113-3027-6
1756:
1755:
1664:Colorado Springs
1624:
1623:
1004:Colorado Springs
983:Colorado Springs
779:vanadium(V) oxide
450:Mississippi River
418:Manhattan Project
285:Western Colorado
4636:
4594:
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4589:
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3525:
3506:Steven L. Danver
3502:
3496:
3495:
3487:
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3464:
3463:
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3447:
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3266:
3264:
3257:North Forty News
3248:
3239:
3238:
3218:
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3211:
3200:
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3193:
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3038:
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3019:
3010:
3009:
2989:
2983:
2982:
2979:Economic Geology
2970:
2964:
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2951:
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2812:J. Ohly (1901).
2809:
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2005:
1999:
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1996:
1994:
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1972:
1967:. pp. 2, 74
1966:
1957:
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1815:
1809:
1806:
1634:
1630:
1361:hydraulic mining
1213:
1181:Lincoln Memorial
1115:California Gulch
1097:Knights of Labor
1028:Colorado Plateau
991:St. Peter's Dome
516:Climax, Colorado
272:cease and desist
264:Summitville mine
75:
71:
4644:
4643:
4639:
4638:
4637:
4635:
4634:
4633:
4599:
4598:
4597:
4587:
4585:
4576:
4575:
4571:
4558:
4554:
4544:
4542:
4533:
4532:
4528:
4518:
4516:
4509:
4508:
4504:
4494:
4492:
4488:
4482:
4478:
4465:
4461:
4452:
4450:
4446:
4440:
4436:
4429:
4413:
4406:
4393:
4392:
4385:
4372:
4359:
4352:
4336:
4332:
4315:
4311:
4304:
4288:
4284:
4267:
4263:
4255:Mining Reporter
4252:
4251:
4247:
4237:
4235:
4227:
4221:
4217:
4210:
4194:
4190:
4183:
4167:
4160:
4150:
4148:
4139:
4138:
4131:
4124:
4108:
4104:
4097:
4081:
4056:
4049:
4035:
4034:
4030:
4023:
4007:
4000:
3993:
3977:
3973:
3966:
3952:
3948:
3941:
3927:
3923:
3912:
3908:
3901:
3887:
3883:
3872:
3868:
3855:
3851:
3842:
3840:
3832:
3826:
3815:
3798:
3794:
3781:
3777:
3764:
3739:
3726:
3722:
3709:
3705:
3698:
3682:
3678:
3668:
3666:
3658:
3652:
3648:
3638:
3636:
3631:
3630:
3626:
3613:
3609:
3602:
3586:
3579:
3566:
3562:
3555:
3533:
3529:
3522:
3508:(14 May 2013).
3503:
3499:
3488:
3484:
3471:
3467:
3454:
3450:
3433:
3429:
3416:
3412:
3403:
3401:
3367:
3363:
3350:
3346:
3339:
3323:
3319:
3312:
3296:
3292:
3280:
3279:
3270:
3269:
3262:
3260:
3249:
3242:
3235:
3219:
3215:
3202:
3201:
3197:
3184:
3180:
3167:
3163:
3150:
3141:
3124:
3120:
3113:
3097:
3088:
3075:
3068:
3059:
3057:
3053:
3039:
3035:
3024:"Carnotite - I"
3020:
3013:
3006:
2990:
2986:
2971:
2967:
2955:
2954:
2945:
2944:
2932:
2928:
2911:
2907:
2894:
2890:
2873:
2869:
2860:
2858:
2854:
2848:
2844:
2829:
2825:
2818:Mining Reporter
2810:
2806:
2798:
2794:
2781:
2777:
2767:
2758:
2757:
2748:
2747:
2743:
2727:
2723:
2716:
2698:
2694:
2679:
2675:
2661:
2660:
2656:
2646:
2644:
2633:
2626:
2613:
2612:
2608:
2601:
2585:
2581:
2571:
2569:
2565:
2559:
2552:
2545:
2523:
2519:
2506:
2499:
2484:
2480:
2473:
2457:
2450:
2443:
2427:
2423:
2416:
2400:
2396:
2373:
2369:
2359:
2357:
2350:
2346:
2345:
2341:
2334:Uranium Country
2330:
2326:
2316:
2314:
2310:
2304:
2300:
2291:
2289:
2285:
2281:
2280:
2276:
2269:
2255:
2254:
2250:
2240:
2238:
2236:The Denver Post
2228:
2224:
2215:
2213:
2201:
2197:
2196:
2187:
2177:
2175:
2170:
2169:
2165:
2155:
2153:
2141:
2139:"Cripple Creek"
2137:
2136:
2132:
2125:
2109:
2105:
2095:
2093:
2088:
2087:
2068:
2052:
2051:
2044:
2042:
2038:
2032:
2028:
2018:
2016:
2006:
2002:
1992:
1990:
1985:
1984:
1980:
1970:
1968:
1964:
1958:
1954:
1946:
1942:
1941:
1937:
1933:
1928:
1927:
1922:
1918:
1912:
1908:
1891:
1887:
1882:
1878:
1873:
1869:
1864:
1860:
1846:
1842:
1829:
1825:
1816:
1812:
1807:
1803:
1798:
1761:
1748:and is now the
1629:
1542:John C. Frémont
1211:
1196:Tellurium Belt
1135:Hinsdale County
575:Ludlow Massacre
409:Grand Junction
70:
31:mining for gold
12:
11:
5:
4642:
4632:
4631:
4626:
4621:
4616:
4611:
4596:
4595:
4569:
4552:
4526:
4502:
4476:
4459:
4434:
4427:
4404:
4383:
4357:
4350:
4330:
4309:
4302:
4282:
4261:
4245:
4215:
4208:
4188:
4181:
4158:
4129:
4122:
4102:
4095:
4054:
4047:
4028:
4021:
3998:
3991:
3971:
3964:
3946:
3939:
3921:
3906:
3899:
3881:
3866:
3849:
3833:(Google books)
3813:
3792:
3775:
3737:
3720:
3703:
3696:
3676:
3646:
3624:
3607:
3600:
3577:
3560:
3553:
3527:
3520:
3497:
3482:
3465:
3448:
3427:
3410:
3361:
3344:
3337:
3317:
3310:
3290:
3240:
3233:
3213:
3195:
3178:
3161:
3139:
3118:
3111:
3086:
3066:
3033:
3011:
3004:
2984:
2965:
2926:
2905:
2888:
2867:
2842:
2823:
2804:
2792:
2775:
2741:
2721:
2714:
2692:
2673:
2654:
2624:
2606:
2599:
2579:
2550:
2543:
2517:
2497:
2478:
2471:
2448:
2441:
2421:
2414:
2394:
2367:
2339:
2324:
2298:
2274:
2267:
2248:
2222:
2185:
2163:
2130:
2123:
2103:
2066:
2026:
2000:
1978:
1952:
1934:
1932:
1929:
1926:
1925:
1916:
1906:
1885:
1876:
1867:
1858:
1840:
1823:
1810:
1800:
1799:
1797:
1794:
1793:
1792:
1787:
1782:
1777:
1772:
1767:
1760:
1757:
1754:
1753:
1738:
1733:
1729:
1728:
1721:
1718:
1714:
1713:
1710:
1707:
1703:
1702:
1699:
1696:
1692:
1691:
1680:
1677:
1673:
1672:
1665:
1662:
1658:
1657:
1654:
1649:
1645:
1644:
1641:
1638:
1628:
1625:
1622:
1621:
1618:
1616:
1613:
1607:
1606:
1596:
1595:Cripple Creek
1593:
1590:
1584:
1583:
1572:
1570:
1567:
1563:
1562:
1556:
1553:
1550:
1546:
1545:
1538:
1535:
1532:
1528:
1527:
1509:
1506:
1503:
1499:
1498:
1491:
1486:
1483:
1479:
1478:
1463:
1458:
1455:
1451:
1450:
1446:
1445:Idaho Springs
1443:
1440:
1436:
1435:
1428:
1425:
1422:
1418:
1417:
1410:
1407:
1404:
1400:
1399:
1396:
1395:Summit County
1393:
1390:
1386:
1385:
1375:
1372:
1369:
1365:
1364:
1353:
1348:
1345:
1341:
1340:
1329:
1324:
1321:
1317:
1316:
1313:
1310:
1307:
1303:
1302:
1295:
1292:
1289:
1285:
1284:
1280:
1275:
1272:
1268:
1267:
1260:
1257:
1254:
1250:
1249:
1246:
1243:
1240:
1236:
1235:
1232:
1229:
1226:
1222:
1221:
1214:
1209:
1206:
1202:
1201:
1197:
1194:
1189:
1185:
1184:
1166:
1160:
1157:
1153:
1152:
1149:
1146:
1143:
1139:
1138:
1131:
1126:
1123:
1119:
1118:
1111:
1108:
1105:
1101:
1100:
1093:
1088:
1085:
1081:
1080:
1069:
1066:
1063:
1059:
1058:
1055:
1052:
1049:
1045:
1044:
1041:
1038:
1036:
1032:
1031:
1024:
1021:
1018:
1014:
1013:
1005:
1002:
999:
995:
994:
984:
981:
978:
974:
973:
970:
967:
964:
960:
959:
952:
947:
944:
940:
939:
936:
933:
932:carbonate ore
930:
926:
925:
922:
921:Cripple Creek
919:
916:
912:
911:
904:
901:
898:
894:
893:
890:
887:
884:
880:
879:
876:
875:Cripple Creek
873:
870:
866:
865:
854:
853:Cripple Creek
851:
848:
844:
843:
832:
829:
826:
822:
821:
818:
817:Cripple Creek
815:
812:
808:
807:
801:
798:
795:
791:
790:
775:
772:
769:
765:
764:
757:
752:
747:
743:
742:
735:
732:
727:
723:
722:
718:
715:
712:
708:
707:
704:
703:Cripple Creek
701:
698:
694:
693:
683:
680:
677:
673:
672:
653:
650:
647:
643:
642:
638:
637:Cripple Creek
635:
632:
628:
627:
624:
623:Colorado City
621:
618:
614:
613:
610:
607:
604:
600:
599:
596:Superfund site
588:
585:
582:
578:
577:
563:
560:
557:
553:
552:
548:
545:
542:
538:
537:
530:
527:
524:
520:
519:
512:
509:
506:
502:
501:
494:
491:
486:
482:
481:
466:
461:
458:
454:
453:
444:was stated in
438:
433:
430:
426:
425:
414:War Department
410:
407:
404:
400:
399:
393:
390:
387:
383:
382:
375:
368:
363:
359:
358:
355:Gunnison River
343:
341:Grand Junction
338:
335:
331:
330:
323:
320:
317:
313:
312:
309:
306:
303:
299:
298:
286:
283:
280:
276:
275:
268:Superfund site
260:
257:
254:
250:
249:
242:
237:
234:
230:
229:
222:
217:
212:
208:
207:
200:
197:
194:
190:
189:
182:
179:
177:
173:
172:
169:
167:
164:
160:
159:
156:
154:Piceance Basin
151:
146:
142:
141:
137:
134:
131:
127:
126:
123:
120:
117:
113:
112:
105:Paradox Valley
101:
98:
93:
89:
88:
85:
82:
79:
69:
66:
9:
6:
4:
3:
2:
4641:
4630:
4627:
4625:
4622:
4620:
4617:
4615:
4612:
4610:
4607:
4606:
4604:
4583:
4579:
4573:
4565:
4564:
4556:
4540:
4536:
4530:
4514:
4513:
4506:
4487:
4480:
4472:
4471:
4463:
4445:
4438:
4430:
4424:
4420:
4419:
4411:
4409:
4400:
4396:
4390:
4388:
4379:
4378:
4370:
4368:
4366:
4364:
4362:
4353:
4347:
4343:
4342:
4334:
4326:
4322:
4321:
4313:
4305:
4299:
4295:
4294:
4286:
4278:
4274:
4273:
4265:
4257:
4256:
4249:
4233:
4226:
4219:
4211:
4205:
4201:
4200:
4192:
4184:
4178:
4174:
4173:
4165:
4163:
4146:
4142:
4136:
4134:
4125:
4119:
4115:
4114:
4106:
4098:
4092:
4088:
4087:
4079:
4077:
4075:
4073:
4071:
4069:
4067:
4065:
4063:
4061:
4059:
4050:
4044:
4040:
4039:
4032:
4024:
4022:0-8032-4752-4
4018:
4014:
4013:
4005:
4003:
3994:
3988:
3984:
3983:
3975:
3967:
3961:
3957:
3956:Colorado Gold
3950:
3942:
3936:
3932:
3931:Colorado Gold
3925:
3917:
3910:
3902:
3896:
3892:
3891:Colorado Gold
3885:
3877:
3870:
3862:
3861:
3853:
3839:. p. 173
3838:
3831:
3824:
3822:
3820:
3818:
3809:
3805:
3804:
3796:
3788:
3787:
3779:
3771:
3770:
3762:
3760:
3758:
3756:
3754:
3752:
3750:
3748:
3746:
3744:
3742:
3733:
3732:
3724:
3716:
3715:
3707:
3699:
3693:
3689:
3688:
3680:
3664:
3657:
3650:
3634:
3628:
3620:
3619:
3611:
3603:
3597:
3593:
3592:
3584:
3582:
3573:
3572:
3564:
3556:
3550:
3546:
3541:
3540:
3531:
3523:
3517:
3513:
3512:
3507:
3501:
3493:
3486:
3478:
3477:
3469:
3461:
3460:
3452:
3444:
3440:
3439:
3431:
3423:
3422:
3414:
3400:
3396:
3392:
3388:
3384:
3380:
3376:
3372:
3365:
3357:
3356:
3348:
3340:
3334:
3330:
3329:
3321:
3313:
3307:
3303:
3302:
3294:
3286:
3281:|author=
3274:
3258:
3254:
3247:
3245:
3236:
3230:
3226:
3225:
3217:
3209:
3205:
3199:
3191:
3190:
3182:
3174:
3173:
3165:
3157:
3156:
3148:
3146:
3144:
3135:
3131:
3130:
3122:
3114:
3108:
3104:
3103:
3095:
3093:
3091:
3082:
3081:
3073:
3071:
3056:on 2014-03-02
3052:
3048:
3044:
3037:
3029:
3025:
3018:
3016:
3007:
3001:
2997:
2996:
2988:
2980:
2976:
2969:
2961:
2949:
2941:
2937:
2930:
2922:
2918:
2917:
2909:
2901:
2900:
2892:
2884:
2880:
2879:
2871:
2853:
2846:
2838:
2834:
2827:
2819:
2815:
2808:
2801:
2796:
2788:
2787:
2779:
2771:
2764:
2759:|author=
2752:
2744:
2738:
2734:
2733:
2725:
2717:
2711:
2707:
2703:
2696:
2688:
2684:
2677:
2669:
2665:
2658:
2642:
2638:
2631:
2629:
2620:
2616:
2610:
2602:
2596:
2592:
2591:
2583:
2564:
2557:
2555:
2546:
2540:
2536:
2531:
2530:
2521:
2513:
2512:
2504:
2502:
2493:
2489:
2482:
2474:
2468:
2464:
2463:
2455:
2453:
2444:
2438:
2434:
2433:
2425:
2417:
2411:
2407:
2406:
2398:
2390:
2386:
2382:
2378:
2371:
2356:
2349:
2343:
2335:
2328:
2309:
2302:
2284:
2278:
2270:
2264:
2260:
2259:
2252:
2237:
2233:
2226:
2211:
2207:
2200:
2194:
2192:
2190:
2173:
2167:
2151:
2147:
2140:
2134:
2126:
2120:
2116:
2115:
2107:
2091:
2085:
2083:
2081:
2079:
2077:
2075:
2073:
2071:
2062:
2056:
2037:
2030:
2015:
2011:
2004:
1988:
1982:
1963:
1956:
1945:
1939:
1935:
1920:
1910:
1903:
1899:
1895:
1889:
1880:
1871:
1862:
1855:
1850:
1844:
1837:
1833:
1827:
1820:
1814:
1805:
1801:
1791:
1788:
1786:
1783:
1781:
1778:
1776:
1773:
1771:
1768:
1766:
1763:
1762:
1751:
1747:
1743:
1739:
1737:
1734:
1731:
1730:
1726:
1722:
1719:
1716:
1715:
1711:
1708:
1705:
1704:
1700:
1697:
1694:
1693:
1689:
1685:
1681:
1678:
1675:
1674:
1670:
1666:
1663:
1660:
1659:
1655:
1653:
1650:
1647:
1646:
1643:Organization
1642:
1639:
1636:
1635:
1619:
1617:
1614:
1612:
1609:
1608:
1604:
1600:
1597:
1594:
1591:
1589:
1586:
1585:
1580:
1576:
1573:
1571:
1568:
1565:
1564:
1560:
1557:
1554:
1551:
1548:
1547:
1543:
1539:
1536:
1533:
1530:
1529:
1525:
1521:
1520:Ralston Creek
1517:
1513:
1512:Lewis Ralston
1510:
1507:
1504:
1501:
1500:
1496:
1492:
1490:
1487:
1484:
1481:
1480:
1476:
1472:
1468:
1464:
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1427:Central City
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1351:Russell Gulch
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1327:Gilpin County
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68:Mining events
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4586:. Retrieved
4581:
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4543:. Retrieved
4539:the original
4529:
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4145:the original
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3051:the original
3046:
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2845:
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2640:
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2570:. Retrieved
2528:
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2380:
2370:
2358:. Retrieved
2351:(Fact Sheet)
2342:
2333:
2327:
2315:. Retrieved
2301:
2290:. Retrieved
2277:
2257:
2251:
2239:. Retrieved
2235:
2225:
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2209:
2205:
2176:. Retrieved
2166:
2154:. Retrieved
2149:
2145:
2133:
2113:
2106:
2094:. Retrieved
2043:. Retrieved
2029:
2017:. Retrieved
2013:
2003:
1991:. Retrieved
1981:
1969:. Retrieved
1955:
1938:
1919:
1909:
1888:
1879:
1870:
1861:
1853:
1848:
1843:
1826:
1813:
1804:
1559:Zebulon Pike
1524:Gold Country
1508:Denver area
1461:Montana City
1378:
1242:silver-lead
1148:Park County
956:Fort Collins
570:
547:Lake County
480:(1890-1930)
473:
445:
62:Denver Basin
55:
26:
25:
15:
4588:January 18,
4545:January 18,
4519:January 17,
4495:January 17,
4238:January 18,
4151:January 17,
3669:January 19,
3639:January 19,
3263:January 20,
2956:|work=
2647:January 21,
2572:January 21,
2360:January 22,
2317:January 22,
2241:January 22,
2178:January 22,
2156:January 21,
2096:January 22,
2045:January 22,
2019:January 22,
1993:January 22,
1971:January 22,
1904:until 1861.
1736:Golden City
1632:Chronology
1432:Clear Creek
1383:Denver Mint
1245:Georgetown
1231:Black Hawk
1169:Yule Marble
1051:molybdenum
508:molybdenum
468:During the
422:atomic bomb
372:carbonatite
226:Climax mine
73:Chronology
4603:Categories
4453:2014-02-09
3965:0878424555
3940:0878424555
3900:0878424555
3843:2014-02-11
3835:(Report).
3404:2014-03-02
3060:2014-03-02
2861:2014-03-02
2292:2014-02-06
2216:2013-02-16
1931:References
1819:Home Depot
1679:Lulu City
1537:Lake City
1357:Fall River
1294:Leadville
1259:Argentine
1110:Leadville
1095:The first
1068:Leadville
1040:Leadville
935:Leadville
889:Leadville
831:Leadville
755:Perry Park
734:Nederland
511:Leadville
370:Iron Hill
215:molybdenum
196:gemstones
181:Leadville
136:Gold Hill
3399:131103050
3273:cite news
2958:ignored (
2948:cite book
2751:cite book
2389:0096-3402
2090:"History"
1690:in 1977.
1640:Location
1489:Englewood
1333:Civil War
1278:Montezuma
1218:Uraninite
1192:tellurium
1129:Lake City
980:aluminum
804:Carnotite
787:Roc Creek
739:Nederland
679:aluminum
655:Governor
598:in 1983.
529:Hastings
478:Coal Wars
440:Pueblo's
396:Coffinite
319:aluminum
220:Leadville
149:nahcolite
84:District
51:tellurium
2206:Rocktalk
2146:Rocktalk
2055:cite web
1759:See also
1502:1850-06
1482:1857-06
1439:1859-04
1421:1859-05
1414:arrastra
1403:1859-07
1389:1859-08
1379:See also
1368:1860-07
1344:1860-07
1312:Boulder
1299:Oro City
1253:1864-09
1225:1867-06
1208:uranium
1020:uranium
987:Cryolite
943:1886-09
847:1894-05
825:1896-07
811:1896-09
797:uranium
781:and 20%
771:uranium
730:tungsten
714:uranium
571:See also
556:1913-14
474:See also
406:uranium
392:Gateway
389:uranium
374:complex
366:titanium
337:uranium
305:uranium
282:uranium
119:uranium
3379:Bibcode
1720:Denver
1709:Denver
1698:Pueblo
1603:caldera
1599:Breccia
1588:Miocene
1374:Denver
1274:silver
1256:silver
1165:Valley
1159:marble
1145:copper
1065:silver
1054:Climax
828:silver
686:Bauxite
606:radium
587:Denver
584:radium
562:Ludlow
349:at the
266:(now a
96:uranium
4425:
4348:
4300:
4206:
4179:
4120:
4093:
4045:
4019:
3989:
3962:
3937:
3897:
3694:
3598:
3551:
3518:
3397:
3335:
3308:
3231:
3109:
3002:
2739:
2712:
2597:
2541:
2469:
2439:
2412:
2387:
2265:
2121:
1898:Kansas
1821:store.
1652:Creede
1611:Eocene
1471:Denver
908:Creede
750:gypsum
489:radium
464:Serene
436:Pueblo
87:Event
47:gypsum
35:silver
4489:(PDF)
4228:(PDF)
3659:(PDF)
3395:S2CID
2855:(PDF)
2566:(PDF)
2311:(PDF)
2286:(PDF)
2202:(PDF)
2142:(PDF)
2039:(PDF)
1965:(PDF)
1947:(PDF)
1796:Notes
1732:1870
1717:1876
1706:1882
1695:1891
1676:1949
1661:1970
1648:1992
1637:Date
1615:coal
1592:gold
1569:gold
1566:1758
1552:gold
1549:1807
1534:gold
1531:1848
1505:gold
1485:gold
1457:gold
1454:1858
1442:gold
1424:gold
1406:gold
1392:gold
1371:gold
1347:gold
1323:gold
1320:1861
1309:coal
1306:1863
1291:gold
1288:1864
1271:1864
1239:1866
1228:gold
1205:1871
1188:1872
1156:1873
1142:1873
1125:gold
1122:1874
1107:lead
1104:1877
1087:coal
1084:1878
1062:1879
1048:1879
1035:1880
1017:1881
1001:coal
998:1882
977:1882
966:zinc
963:1885
946:gold
929:1887
918:gold
915:1890
900:gold
897:1892
886:iron
883:1892
872:gold
869:1893
850:gold
814:gold
794:1898
768:1898
746:1898
726:1899
711:1900
700:gold
697:1900
682:COMB
676:1901
649:gold
646:1903
634:gold
631:1904
620:gold
617:1907
603:1910
581:1913
559:coal
544:zinc
541:1915
526:coal
523:1917
505:1918
485:1923
460:coal
457:1927
432:iron
429:1941
403:1943
386:1954
362:1956
334:1957
327:Coors
322:COMB
316:1959
302:1965
279:1972
256:gold
253:1991
236:gold
233:1995
211:1995
193:1996
176:1999
166:coal
163:2004
145:2004
133:gold
130:2008
116:2009
92:2011
81:Type
78:Date
4590:2015
4547:2015
4521:2015
4497:2015
4423:ISBN
4346:ISBN
4298:ISBN
4240:2015
4204:ISBN
4177:ISBN
4153:2015
4118:ISBN
4091:ISBN
4043:ISBN
4017:ISBN
3987:ISBN
3960:ISBN
3935:ISBN
3895:ISBN
3692:ISBN
3671:2015
3641:2015
3596:ISBN
3549:ISBN
3516:ISBN
3333:ISBN
3306:ISBN
3285:help
3265:2015
3229:ISBN
3107:ISBN
3000:ISBN
2960:help
2770:link
2763:help
2737:ISBN
2710:ISBN
2649:2015
2595:ISBN
2574:2015
2539:ISBN
2467:ISBN
2437:ISBN
2410:ISBN
2385:ISSN
2362:2015
2319:2014
2263:ISBN
2243:2015
2180:2015
2158:2015
2119:ISBN
2098:2015
2061:link
2047:2015
2021:2015
1995:2015
1973:2015
1900:and
1723:The
1682:The
1091:Erie
1071:The
1023:UMB
834:The
800:UMB
774:UMB
717:UMB
609:UMB
590:The
565:The
532:The
493:UMB
412:The
288:The
262:The
224:The
202:The
122:UMB
100:UMB
43:coal
41:and
33:and
4325:134
3545:181
3443:339
3387:doi
3134:139
2883:227
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420:(
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
