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Ketellapper, V.L.; Williams, L.O.; Bell, R.S.; Cramer, M.H. |
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Title |
The control of acid mine drainage at the Summitville Mine Superfund Site |
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1996 |
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Proceedings of the Symposium on the Application of Geophysics to Environmental and Engineering Problems (SAGEEP), vol.1996 |
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303-311 |
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acid mine drainage Colorado Del Norte Colorado gold ores metal ores mines mining mining geology open-pit mining pollutants pollution remediation Rio Grande County Colorado Summitville Mine Superfund sites surface mining United States water quality 22, Environmental geology |
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The Summitville Mine Superfund Site is located about 25 miles south of Del Norte, Colorado, in Rio Grande County. Occurring at an average elevation of 11,500 feet in the San Juan Mountain Range, the mine site is located two miles east of the Continental Divide. Mining at Summitville has occurred since 1870. The mine was most recently operated by Summitville Consolidated Mining Company, Inc. (SCMCI) as an open pit gold mine with extraction by means of a cyanide leaching process. In December of 1992, SCMCI declared bankruptcy and vacated the mine site. At that time, the US Environmental Protection Agency (EPA) took over operations of the water treatment facilities to prevent a catastrophic release of cyanide and metal-laden water from the mine site. Due to high operational costs of water treatment (approximately $50,000 per day), EPA established a goal to minimize active water treatment by reducing or eliminating acid mine drainage (AMD). All of the sources of AMD generation on the mine site were evaluated and prioritized. Of the twelve areas identified as sources of AMD, the Cropsy Waste Pile, the Summitville Dam Impoundment, the Beaver Mud Dump, the Reynolds and Chandler adits, and the Mine Pits were consider to be the most significant contributors to the generation of metal-laden acidic (low pH) water. A two part plan was developed to control AMD from the most significant sources. The first part was initiated immediately to control AMD being released from the Site. This part focused on improving the efficiency of the water treatment facilities and controlling the AMD discharges from the mine drainage adits. The discharges from the adits was accomplished by plugging the Reynolds and Chandler adits. The second part of the plan was aimed at reducing the AMD generated in groundwater and surface water runoff from the mine wastes. A lined and capped repository located in the mine pits for acid generating mining waste and water treatment plant sludge was found to be the most feasible alternative. Beginning in 1993, mining wastes which were the most significant sources of AMD were being excavated and placed in the Mine Pits. In November 1995, all of the waste from these sources had been excavated and placed in the the Mine Pits. This paper discusses EPA's overall approach to stabilize on-site sources sufficiently such that aquatic, agricultural, and drinking water uses in the Alamosa watershed are restored and/or maintained with minimal water treatment. |
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The control of acid mine drainage at the Summitville Mine Superfund Site; GeoRef; English; 2002-027195; Symposium on the Application of geophysics to engineering and environmental problems, Keystone, CO, United States, April 28-May 2, 1996 References: 11; illus. incl. geol. sketch map |
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CBU @ c.wolke @ 16654 |
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334 |
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Dunn, J.; Russell, C.; Morrissey, A. |
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Title |
Remediating historic mine sites in Colorado |
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1999 |
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Min. Eng. |
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51 |
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8 |
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32-35 |
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Reclamation and conservation Groundwater problems and environmental effects geological abstracts: environmental geology (72 14 1) geomechanics abstracts: excavations (77 10 10) abandoned mine acid mine drainage environmental effect remediation United States Colorado |
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This article provides examples of reclamation and remediation in Colorado watersheds. The projects were undertaken by the US Environmental Protection Agency (EPA) Region 8, in cooperation with the Colorado Division of Minerals and Geology (CDMG), Colorado Department of Public Health and Environment (CDPHE), US Forest Service (USFS), the Bureau of Land Management (BLM), Bureau of Reclamation (BOR) and the US Geological Survey (USGS). These agencies collaborated on the environmental problems at abandoned mines. These samples involved the interaction of surface and ground waters with sulfide-bearing rocks, mine workings and surface mine spoils that produce acid solutions charged with heavy metals that are toxic to organisms. In these examples, acid mine drainage from historic mines in Colorado has been approached cooperatively with stakeholders. Each example emphasizes one aspect of the three-stage process. These stages include characterization and prioritization, hydrologic controls and the evaluation of long-term remediation activities. |
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J. Dunn, US Environmental Protection Agency, Region 8, 999 18(th) St., Suite 500, Denver, CO 80202-2466, United States |
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0026-5187 |
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Remediating historic mine sites in Colorado; 0434641; United-States; Geobase |
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CBU @ c.wolke @ 17547 |
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398 |
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Plumlee, G.S. |
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Mine-drainage waters as potential economic resources |
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1995 |
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SEG Newsletter |
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22 |
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6-7 |
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acid mine drainage; Colorado; concentration; geochemistry; hydrochemistry; metals; mine drainage; mineral resources; mines; remediation; Rio Grande County Colorado; Summitville Mine; United States; utilization 27A, Economic geology, geology of ore deposits |
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Mine-drainage waters as potential economic resources; 2004-033372; References: 7; 1 table United States (USA); GeoRef; English |
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CBU @ c.wolke @ 6428 |
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268 |
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Stewart, D.; Norman, T.; Cordery-Cotter, S.; Kleiner, R.; Sweeney, E.; Nelson, J.D. |
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Utilization of a ceramic membrane for acid mine drainage treatment |
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1997 |
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Tailings and Mine Waste '97 |
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453-460 |
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acid mine drainage; Black Hawk Colorado; Central City Colorado; ceramic materials; Colorado; cost; disposal barriers; geochemistry; Gilpin County Colorado; heavy metals; mines; organic compounds; pollution; remediation; surface water; tailings; United States; utilization; volatile organic compounds; volatiles; waste disposal mine water treatment |
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BASX Systems LLC has developed a treatment system based on ceramic membranes for the removal of heavy metals from an acid mine drainage stream. This stream also contained volatile organic compounds that were required to be removed prior to discharge to a Colorado mountain stream. The removal of heavy metals was greater than 99% in most cases. A decrease of 30% in chemicals required for treatment and a reduction by more than 75% in labor over a competing technology were achieved. These decreases were obtained for operating temperatures of less than 5 degrees C. This system of ceramic microfiltration is capable of treating many different types of acid mine waste streams for heavy metals removal. |
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90-5410-857-6 |
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Jan 13-17; Utilization of a ceramic membrane for acid mine drainage treatment; Isip:A1997bg96u00050; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 8744 |
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135 |
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Yernberg, W.R. |
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Improvements seen in acid-mine-drainage technology |
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2000 |
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Min. Eng. |
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52 |
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9 |
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67-70 |
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acid mine drainage; bacteria; chemical weathering; coal mines; Colorado; copper ores; effects; geochemistry; hydrogen; inorganic acids; international cooperation; ions; lead ores; medical geology; metal ores; mines; molybdenum ores; oxidation; pH; pollution; prediction; pyrite; reclamation; remediation; research; risk assessment; silicates; soil treatment; solid waste; sulfides; sulfuric acid; Summitville Mine; tailings; tailings ponds; technology; United States; waste disposal; weathering; zinc ores 22, Environmental geology |
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0026-5187 |
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Improvements seen in acid-mine-drainage technology; 2000-069686; illus. incl. sect., sketch map United States (USA); GeoRef; English |
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CBU @ c.wolke @ 5808 |
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73 |
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