Project Matrix

Table 3 (below) is a summary of all Mine Waste Technology Program projects performed since its inception in 1991. Each project is categorized by the issue areas addressed by the project. Information on technologies or processes demonstrated, the demonstration site, and a brief description of each project is also given. For information on these projects, refer to the web site: http://www.epa.gov/minewastetechnology/

**Acid Drainage/Water Treatment/Trace Metal Removal**
Project Name								Technology or Process Provider	Demonstrations Site / Location	Comments
Remote Mine Site	*		*			*	*	Aquafix / Aquafix Systems	Crystal Mine, near Basin Montana	Aquafix system was used to deliver lime to AMD emanating from the adit of the Crystal Mine in Montana
Ceramic Microfiltration System	*			*				Ceramic Microfiltration System/ BASX Systems, LLC	Gregory Incline/ Black Hawk and Central City, Colorado	A ceramic microfiltration system was demonstrated.
Physical Solutions for AMD at Remote Sites	*			*		*	*	Active treatment system within mine/MSE Technology Applications	Susie Mine/ Rimini, Montana	This project will evaluate a technology for the removal of heavy metals from acid mine drainage in the Ten Mile Creek area of Montana in support of EPA Region 8.
Thallium Removal from Mine Waste Waters	*			*				Reductive Precipitation/ Montana Tech	Asarco East Helena Smelter water/MSE Technology Applications testing facility	Optimization studies on a thallium removal technology will be performed. The technologies will also be monitored for removal of other selected metals.
Arsenic Oxidation	*			*		*		Photochemical oxidation and UV oxidation/Australian Nuclear Science and Technology Organization	Susie Mine, Rimini, Montana	This project demonstrated and evaluated arsenic oxidation and removal technologies.
Arsenic Removal	*			*		*		Mineral-like Precipitation/ Montana Tech Alumina Adsorption/Zenon Ferrihydrite Adsorption/ optimized by MSE Technology Applications and Montana Tech	Asarco East Helena Smelter TVX Mineral Hill Mine water demonstrated at MSE Technology Applications testing facility	Two innovative technologies and the BDAT were evaluated for arsenic removal from various arsenic-contaminated waters.
Passive Arsenic Removal	*		*					Various reactive medias/ MSE Technology Applications	MSE Technology Applications testing facility/ Butte, Montana
Selenium Removal / Treatment Alternatives	*	*	*	*		*		Biological Selenium Reduction/ Applied Biosciences Catalyzed Cementation/Montana Tech Ferrihydrite Adsorption— Best Demonstrated Available Technology/optimized by MSE Technology Applications	Kennecott Utah Copper Corporation/ Kessler Springs	Three selenium removal technologies were demonstrated (BDAT, Catalyzed Cementation and Biological Selenium Reduction) at the Kessler Springs site at Kennecott Utah Copper Corporation.
Long-Term Monitoring of a Preamble Treatment Wall	*	*	*			*	*	Apatite II treatment media/ Phosphate-induced Metals Stabilization Northwest	Nevada Stewart Mine/near Pinehurst, Idaho	A passive treatment system using apatite was installed at the Nevada Stewart Mine near Pinehurst, Idaho for removal of zinc.
Nitrate Removal	*	*		*				Nitrate Ion Exchange (NIX)/ Altair, Inc. Electrochemical Ion Exchange/ Selentec, Inc. Biological Denitrification/ Montana Tech	TVX Mineral Hill Mine/Gardiner, Montana	Demonstration of biological and electrochemical ion exchange technologies for nitrate removal at the Mineral Hill Mine near Jardine, Montana.
An Investigation to Develop a Technology for Removing Thallium from Mine Waste Waters	*				*			Reductive Precipitation/ Montana Tech	Montana Tech/ Butte, Montana	Two technologies for removing thallium from mine wastewaters were evaluated. One was manganese dioxide adsorption, which effectively removed thallium but was difficult to strip and regenerate. The other was reductive precipitation, in which metallic iron was used to create strongly reducing conditions, under which thallium could be effectively removed by sulfide precipitation. This second technology was very effective and is being further developed.
Modified Ferrihydrite for Enhanced Removal of Heavy Metals from Mine Waste Water	*			*				Modified Ferrihydrite/ Montana Tech	Montana Tech, Butte, Montana	A series of experiments will be conducted to evaluate the adsorptive properties of modified ferrihydrite.
Metal Ion Removal from Acid Mine Waste Water	*		*	*				Neutral chelating polymers/ Montana Tech	Montana Tech/ Butte, Montana	Neutral chelating polymers were investigated for their metal removal potential.
Removal of Arsenic as Storable Stable Precipitates	*			*				Apatite-like mineral precipitation/Montana Tech	Montana Tech/ Butte, Montana	A process was developed to remove arsenic from solution and generate a stable precipitate.
Removing Oxyanions of Arsenic & Selenium from Mine Waste Waters using Galvanically Enhanced Cementation Technology	*			*				Galvanically enhanced cementation/Montana Tech	Montana Tech/ Butte, Montana	This project built on previous work showing cementation with metallic iron was very effective at removing arsenic and selenium (at any oxidation state) from solution. The project evaluated and proved the concept of accelerating the cementation reactions by the use of galvanic couples (particularly the iron-copper couple), which produced electrons for reduction much more rapidly.
Sulfate Removal Technology	*			*				Precipitation/Montana Tech Electrochemical metal reduction/Montana Tech	Montana Tech/ Butte, Montana	Two technologies for lowering sulfate were investigated, including precipitation of sulfate bearing compounds and electrochemical metal reduction of sulfate.
Metal Remediation Cementation	*			*				Reductive precipitation/ cementation/Montana Tech	Montana Tech/ Butte, Montana	This study developed a technology for treating acid mine water by validating the concept of reductive precipitation/cementation for removing heavy metals specifically cadmium, copper, nickel, lead, and zinc.

**Sulfate-Reducing Bacteria - Related Projects**
Project Name											Technology or Process Provider	Demonstrations Site / Location	Comments
In Situ Source Control of Acid Generation using SRBs	*	*	*	*			*	*		*	SRB System within Mine Workings/MSE Technology Applications	Lilly/Orphan Boy Mine/near Elliston, MT	For the past 10 years, a sustainable passive treatment using sulfate-reducing bacteria has significantly improved the quality of water emanating from the Lilly/Orphan Boy Mine, a remote, abandoned mine that discharges into a tributary of the Clark Fork River. The organic nutrient applied to stimulate the naturally occurring SRBs was applied only the first year—the treatment has become self-sustaining. The physical features of the mine were used as part of the treatment eliminating the need for capital investment in equipment, and the treatment has virtually no annual operating costs. The technology has been transferred from the MWTP to various U.S. Forest Service Sites and has led to several other MWTP projects.
Sulfate-Reducing Bacteria Reactive Wall		*	*	*			*			*	SRB Systems of Various Configurations/MSE Technology Applications	Calliope Mine/ near Butte, MT	Three engineered bioreactors were constructed at the Calliope Mine to demonstrate the feasibility of using SRB passive technology.
Integrated Passive Biological Treatment System		*	*	*			*	*		*	Integrated Passive Biological Treatment System/MSE Technology Applications	Surething Mine, near Elliston, Montana	The Integrated Passive Biological Treatment Process project is demonstrating a technology consisting of a series of biological processes for the complete mitigation of acid mine drainage (AMD).
Sulfate-Reducing Bacteria-Driven Sulfide Precipitation		*	*		*					*	Two-stage Bioreactor with Recycle/MSE Technology Applications	Golden Sunlight Mine, near Whitehall, Montana	A unique two-stage bioreactor system was designed to treat acid drainage waters. In one stage, acid drainage influent was mixed with recycled bioreactor effluent to reduce acidity and precipitate metals. Clear solution overflowed to the bioreactor stage where methanol was added as a food source for sulfate-reducing bacteria. Operation greatly improved the water discharged to the environment. The pH of the effluent averaged 6.0. The acidity, copper, aluminum, and zinc were reduced by greater than 99%. Iron was reduced by 94% and sulfate was reduced by 40%.
Gas-Fed Sulfate-Reducing Bacteria Berkeley Pit Water Treatment		*	*		*	*	*				Biosulfide process/ Biomet of Canada	Mike Mansfield Advanced Technology Center, Butte, MT	The Biosulfide process was utilized to separate and recover copper and zinc from Berkeley Pit water. The process included a partial oxidation natural gas burner to produce a hydrogen-rich off gas, which was then fed along with nutrients to a sulfate-reducing bacteria reactor for production of hydrogen sulfide gas from process water. The hydrogen sulfide gas was used to recover copper and zinc as sulfides.
Improvements in Engineered Bioremediation of Acid Mine Drainage		*	*	*				*	*		BEST Model/MSE Technology Applications, Butte, MT	Mike Mansfield Advanced Technology Center, Butte, MT	The BEST model was developed to aid in the design of passive treatment systems for AMD.
Biological Prevention of Acid Mine Drainage (Gilt Edge Mine)	*		*								Redox-mediated Biotransformation/ Green World Science under license to ARCADIS	Gilt Edge Mine/ near Deadwood, South Dakota	Carbon sources (animal feed-grade molasses and methanol) were added to saturated acid-generating waste rock to create reducing conditions and eliminate the production of acid mine drainage.
Organic Degradation Rates, Phase I and II				*				*		*	Natural Wetland/Montana Tech	Upper Blackfoot Mining Complex/ Lincoln, Montana	The primary objectives for this project were to determine the organic matter decay rate in sulfate-reducing wetlands and improve the understanding of how natural wetlands function in metals-contaminated regions.

**Prevention / Source Control**
Project Name									Technology or Process Provider	Demonstrations Site / Location	Comments
Clay-Based Grouting	*					*		*	Ukranian clay-based grout/ Spetstamponazhgeologia Enterprises (STG)	Mike Horse Mine, near Lincoln, Montana	Clay-based grout was injected into the workings of the Mike Horse Mine in Montana
Underground Mine Source Control	*					*		*	Polyurethane expandable grout/de neef Construction Chemicals, Inc.	Miller Mine, near Townsend, Montana	This project demonstrated that grout materials can be used to reduce and/or eliminate the influx of water into the underground mine system by forming an impervious barrier that results in reduced, long-term environmental impacts of the abandoned mine.
Surface Waste Piles/Source Control	*					*		*	Spray-applied urethane grout/ General Polymers, Inc.	Peerless Mine, near Rimini, Montana	A surface waste pile at the Peerless Mine was capped using a spray-applied urethane grout. A French drain system was also installed to control groundwater flow at the site.
Source Control Tailings Cap	*					*		*	IESCRETE/International Engineering Solutions Krystal Bond/Krystal Bond, Inc. Spray-applied, modified polyurea/Quality Maintenance Contractors	Mammoth Mine, near Townsend, Montana	This project identified a source control material for application on tailings at the Mammoth Mine in Montana.
Prevention of AMD Generations from Open-Pit Mine Highwalls	*					*		*	Furfuryl alcohol resin sealant (FARS)/Intermountain Polymer EcoBond™/Metals Treatment Technology Dupont Passivation Porcess/ University Nevada Reno UNR Magnesium Oxide/ University Nevada Reno	Golden Sunlight Mine/Whitehall, Montana	Various grout materials were applied to the highwall of the Golden Sunlight Mine to assess their effectiveness in acid prevention.
Remediation of Underground Mines Using Source Control/Passive Technologies	*	*		*	*			*	Grouting and SRB Technology /MSE Technology Applications	Lee Mountain Mine near Rimini, Montana	This project will use a combination of two technologies to accomplish the remediation of an underground mine system. A source control (grouting) technology will be used to reduce the flow in the underground mine workings. A second, passive water treatment technology will be used to treat residual water discharging from the adit. The combination of the technologies is expected to increase the efficiency, longevity, and decrease the cost to operate the passive treatment system.
Remediation Technology Evaluation at Gilt Edge Mine	*			*	*			*	Silica microencapsulation/Klean Earth Environmental Company Envirobond/Metals Treatment Technologies Passivation Technology/ University of Nevada, Reno	Waste rock at Gilt Edge Mine/near Deadwood, South Dakota	The project generated performance and cost data for promising new technologies for preventing the oxidation of sulfide waste rock. The new technologies were compared to the presumptive remedy of lime treatment as well as to controls in which no treatment is performed.
Microencapsulation to Prevent AMD	*			*		*			Envirobond/Metals Treatment Technologies Silica microencapsulation/Klean Earth Environmental Company	Research Laboratory for Minnesota Department of Natural Resources/ Duluth, Minnesota	Various microencapsulation technologies were demonstrated. Microencapsulation is the isolation of sulfide minerals by precipitating a chemical coating on unoxidized pyrite or where the material is reacted with an oxidizing agent to produce ferric ions.
Electrochemical Tailings Cover	*							*	Electrochemical Tailings Cover/ Enpar Technologies, Inc.	MSE Technology Applications site/Butte, Montana	The purpose of this project was to gather performance and cost data for an electrochemical cover technology.
Biological Cover	*		*		*			*	Biofilm barrier/Center for Biofilm Engineering at Montana State University and MSE Technology Applications	Mammoth Tailings/near Cardwell, Montana	Biological cover placed on tailings to prevent formation of AMD at the Mammoth Tailings site in Montana. This technology was transferred to Golden Sunlight Mine during the Summer of 2004.
Microbial and Geochemical Responses in Acid Producing Tailings	*		*				*	*	Nutrification of tailings/Montana State University’s Center for Biofilm Engineering	Center for Biofilm Engineering on the Montana State University Campus/Bozeman, Montana	This project will evaluate, at laboratory scale, the geochemical properties of mine tailings when microbes are used as the treatment technology.
Passive Remediation of Sulfide Wastes using Covers, Lime and Controlled Diffusion	*			*		*			Various capping scenarios/Montana Tech	Montana Tech, Butte, Montana	The objective of this research is to recreate, in diffusion cells, sample capping scenarios for the mine waste closure of potentially acid generating materials with lime as an amendment. The cell will then be used to measure oxygen flux under a scale of saturation conditions that would accurately describe the oxygen diffusion through the capping alternatives presently being prescribed in the field.
SITE In Situ Mercury Stabilization Technologies	*			*		*			Silica microencapsulation/Klean Earth Environmental Company Phosphate-based treatment/E&C Williams	Sulfur Bank Mercury Mine/ Clear Lake, California	This project was conducted in conjunction with the SITE program. The project demonstrated the effectiveness of various technologies for in situ treatment/ stabilization of mercury contaminated mining materials.

**Pit Lakes**
Project Name									Technology or Process Provider	Demonstrations Site / Location	Comments
Bioremediation of Pit Lakes	*	*	*		*	*		*	Neutra-Mill/Earth Systems Redox-Mediated Biotransformation/ARCADIS Traditional Technologies to make water dischargeable	Gilt Edge Mine, Deadwood, South Dakota	An in situ treatment of the Anchor Hill Pit Lake at the Gilt Edge site in South Dakota is being performed.
Berkeley Pit Water Treatment	*			*	*			*	Two-stage lime treatment/Montana Tech	Berkeley Pit Lake, Butte Montana	A two-stage lime precipitation technology for treatment of Berkeley Pit water was demonstrated.
Berkeley Pit Innovative Technologies Project	*			*	*			*	Zeolite Production Technology/International Hydronics Corporation Octolig™ and Conventional Precipitation/Metre General, Inc. Mine Remediation Services Hydrometrics Purity Systems, Inc. Geo2 Limited (2 projects) SPC International Corporation Technical Assistance International, Inc. Hydroplus Technologies	Berkeley Pit Lake, Butte Montana	Several technologies were investigated for treatment of Berkeley Pit water
Berkeley Pit Limnocorrals	*	*	*		*			*	Nitrification of Limnocorrals Algae/Montana Tech	Berkeley Pit Lake, Butte Montana	Limnocorrals have been used for about 40 years for experimental studies in lakes when it is necessary to test biological, physical, and chemical properties in situ while varying an aspect of the ecosystem on a small scale to determine the outcome. This project will test bioremediation potential in situ using limnocorrals with nitrification and inoculation with the algae as variables.
Dual Ecosystem Enhancement: In-situ Pit lake Remediation by Slag-Silicate Addition	*				*	*			Slag Addition/Montana Tech	Berkeley Pit Lake, Butte Montana	Remediation potential of smelter slag for in-situ treatment of the Berkeley Pit will be evaluated.
Subaqueous Pyrite Oxidation	*				*			*	Characterization Techniques/ Montana Tech	Berkeley Pit Lake, Butte Montana	This project demonstrated the potential importance of subaqueous pyrite oxidation by Fe³⁺, with special attention to the possible role this process plays in the generation of acid in pit lakes. Stable isotopes were used to elucidate the primary mechanism of pyrite oxidation in the Berkeley Pit Lake (i.e., aerobic versus anaerobic).
Integrated Process for Treatment of Berkeley Pit Water					*		*		Spreadsheet Model/MSE Technology Applications	Berkeley Pit Lake, Butte Montana	The objective of this project is to develop integrated, optimized treatment systems for processing Berkeley Pit water.
Pit Lake System--Characterization and Remediation for the Berkeley Pit Pit Lake System--Deep Water Sediment/Pore Water Characterization and Interactions	*				*			*	Characterization Techniques/ Montana Tech	Berkeley Pit Lake, Butte Montana	Interdisciplinary team of Montana Tech researchers studied various aspects of the Berkeley Pit Lake System.
Pit Lake System--Biological Survey of Berkeley Pit Water Pit Lake System Characterization and Remediation for Berkeley Pit?Phase II	*				*			*	Characterization Techniques/ Montana Tech	Berkeley Pit Lake, Butte Montana	Interdisciplinary team of Montana Tech researchers studied various aspects of the Berkeley Pit Lake System.
Pit Lake System Characterization and Remediation for Berkeley Pit--Phase III	*				*			*	Characterization Techniques/ Montana Tech	Berkeley Pit Lake, Butte Montana	Interdisciplinary team of Montana Tech researchers studied various aspects of the Berkeley Pit Lake System.
Algal Bioremediation of Berkeley Pit Water, Phase II	*	*	*		*			*	Adsorption of metals using algae/ Montana Tech	Montana Tech/Butte, Montana	This project was to further investigate some of the previously isolated extremophiles (specifically algae) from the Berkeley Pit Lake system that may be used as a potential solution for bioremediation.

**Biological Cyanide Destruction**
Project Name					Technology or Process Provider	Demonstrations Site / Location	Comments
Biocyanide	*	*	*		Biological cyanide destruction/ Pintail Systems	McCoy Cove Mine, near Battle Mountain, Nevada	Biological destruction of cyanide was demonstrated at McCoy/Cove Mine near Battle Mountain, Nevada.
Cyanide Heap Biological Detoxification	*	*			Biological cyanide destruction/ Whitlock and Associates, Little Bear Laboratories, Compliance Technology, and Applied Microbiology and Biotechnology	McClelland Laboratories, Sparks, Nevada	Large-scale column tests of four biological cyanide destruction technologies were performed.
Cyanide Heap Biological Detoxification	*	*		*	Biological cyanide destruction/ Whitlock and Associates	Cortez Gold Mine, Crescent Valley, Nevada	This demonstration will be conducted at the Gold Acres Heap Leach Pad located at Placer Dome’s Cortez Gold Mine in Crescent Valley, Nevada. The biological technology owned by Whitlock & Associates of Spearfish, South Dakota, will be used to destroy the cyanide present. The effect of the technology on heavy metals of concern will also be monitored.

**Remote Monitoring**
Project Name		Technology or Process Provider	Demonstrations Site / Location	Comments
Calliope Mine Internet Monitoring System	*	Telemetry, monitoring data available on Internet/MSE Technology Applications	Calliope Mine/ near Butte, Montana	This project installed a system for download remote sampling data and images from the Calliope Mine.
Mine Site Telemetry—Fuel Cell	*	Fuel Cell/Fuel Cell Technologies	Susie Mine/ Rimini, Montana	This project will evaluate the performance of a fuel cell supplied by the DOE National Energy Technology Laboratory as the power source for instrumentation and equipment at a remote mine site.
Remote Analytical Monitor	*	Real-time monitor for Cu, Al, Zn/Johns Hopkins University-Applied Physics Laboratory	Johns Hopkins Applied Physics Laboratory/ /Baltimore, Maryland	A system to monitor Cu, Al, and Zn was tested in the laboratory

**Sustainability**
Project Name						Technology or Process Provider	Demonstrations Site / Location	Comments
Phosphate Stabilization of Heavy-Metals Contaminated Mine Waste Yard Soils	*			*		In-situ lead stabilization using phosphoric acid/Missouri Department of Natural Resources	Joplin, Missouri NPL Site	In-situ phosphate stabilization of soils followed by revegetation of the treatment plots in Joplin, Missouri.
Revegetation of Mining Waste Using Organic Amendments and Evaluate the Potential for Creating Attractive Nuisances for Wildlife	*			*	*	Milorganite/Milwaukee Metropolitan Sewage District Ormiorganics/Organic Resource Management, Inc. St. Peter’s compost/City of St. Peter’s, Missouri	Doe Run Company/ Desloge, Missouri	Coarse and fine-grained tailings sites at as Doe Run Company site near Desloge, Missouri were amended with various compost materials and revegetated.
Acid/Heavy Metal Tolerant Plants	*			*	*	Local accessions of grasses and forbs/Bridger Plant Materials Company	Anaconda Smelter Superfund Site/ near Anaconda, Montana	The goal of this project is to compare the performance of local acid/metal tolerant seed mixes against comparable mixes now commercially available.
Mine Dump Reclamation Using Tickle Grass Project	*			*	*	Tickle Grass/Montana Tech	Montana Tech/ Butte, Montana
Investigation of Natural Wetlands Near Abandoned Mine Sites		*	*	*	*	Natural wetlands/Investigated by Montana Tech	Copper Gulch Wetland/near Jefferson City, Montana Fisher Creek Wetland/near Cooke City, Montana	The main objective of this project was to determine how and to what extent metals are being attenuated by natural wetlands at two remote locations in Montana. Representative samples of soil, groundwater, and surface water were collected for metal analysis. The hydrogeology of each wetland was characterized with the help of shallow piezometers to monitor water level and to collect groundwater samples. Each site was visited several times throughout the year to determine seasonal changes in hydrology or metal removal efficiency.
Mercury Transportation from Reclaimed Mine Sites				*	*	Biosamplers (mice)/ Montana Tech	Silver Creek Drainage/near Marysville, Montana High Ore Creek Repository/near Boulder, Montana	This project determined the uptake of mercury by selected plant species and the possible movement of mercury from plants to higher-level consumers such as mice.
Visualization of In-Situ Douglas Fir Roots and Ectomycorrhizae in the Context of Phytoremediation	*			*	*	Ectomycorrhizal Fungi/ Montana Tech	Ectomycorrhizal Fungi/ Montana Tech	Douglas fir trees will be studied to determine physiological attributes that allow toleration of toxic soils and to determine whether the addition of ectomycorrhizal fungi provides a growth advantage for trees in these types of soils.
Monitoring and Evaluation of Remediation Strategies in the Helena National Forest				*	*	PST resin capsules and standard characterization techniques/ Montana Tech	Helena National Forest/near Helena, Montana	This project evaluated the effects of previously selected remediation methods on both abandoned upland as well as wetland mine sites near Helena, Montana.
Use of Biomonitors for Studying Contamination in Residential Areas and Efficacy of Remediation				*	*	Biomonitors/Montana Tech	Residential areas/ Butte, Montana	Domestic dogs will be used to provide information on exposure patterns in mine waste impacted areas in Butte, Montana.

**Miscellaneous Projects**
Project Name							Technology or Process Provider	Demonstrations Site / Location	Comments
Geochemistry and Isotopic Composition of H₂S-Rich Water in Flooded Underground Mine Workings					*	*	Standard characterization techniques/Montana Tech	Travona Mine Shaft/ Butte, Montana	The purpose of this study is to collect water samples from Butte's West Camp for comprehensive chemical and isotopic analysis and to combine these results with geochemical modeling to more fully understand the processes that control the geochemistry of the West Camp mine waters in Butte, Montana.
Sludge Stabilization	*			*			Standard techniques/ Montana Tech	Montana Tech/ Butte, Montana	Montana Tech/ Butte, Montana
Photoassisted Electron Transfer Reactions Research		*	*				Photocatalysts/Montana Tech	Montana Tech/ Butte, Montana	Dissolved and solid photocatalysts were investigated for removal of cyanide and nitrate anions from mine waters.
Lead Abatement				*			PR-40/LEADX™/PR-40AFX™ Carbon dioxide blasting technology	Residential Homes/ Butte, Montana	This project gathered cost and performance data on an innovative set of technologies capable of removing lead-based paint from interior decorative wood in residential housing.
Update of Case Studies							Case Studies/MSE Technology Applications	Gilt Edge Mine, South Dakota Golden Sunlight Mine, Montana Leviathan Mine, California	This project completed three case studies on mine sites initially done using funding from the EPA SITE Program. The work included comment incorporation from reviewers as well as updated information about each site. The three sites profiled in the original document included: Gilt Edge Mine in South Dakota; the Leviathan Mine in California; and the Golden Sunlight Mine in Montana.
Artificial Neural Networks as an Analysis Tool for Geochemical Data					*		Articial Neural Networks/ Montana Tech	Montana Tech, Butte, Montana	This project applies to artificial neural network (ANN) analysis of geochemical and similar data sets, such as those acquired from the Berkeley Pit in Butte, Montana. There are two main types of ANN, supervised and unsupervised networks, and both lend themselves to analyses of this nature.
Sulfide Complexes Formed from Mill Tailings Project						*	Column study/Montana Tech	Montana Tech, Butte, Montana	Montana Tech, Butte, Montana
CALPUFF Modeling of Copper Smelter Emissions					*		CALPUFF Software/ Montana Tech	Anaconda, MT and the surrounding smelter fallout zone	The goal of this project is to use advanced features of the CALPUFF modeling system to study the impact of the Anaconda smelter plume throughout the region.

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