Geological specialists serving metal mining and industrial minerals, and aggregate producers

Who We Are

Mark W. Osterberg, Ph.D., P.G

Address                                                                        

            1507 West 4th Street                                                                       
            Marshfield , WI 54449
            520-405-8922
            markosterberg@minemappers.com

Expertise

Dr. Mark Osterberg has worked for major gold and base metal mining companies and has over twenty-six years experience in the mining business. He has provided high level technical expertise to projects in the USA and overseas and has managed multiyear exploration and development projects as well. He has expertise and experience in porphyry copper and molybdenum systems, carlin-type gold systems, shear-zone and volcanic-hosted mesothermal gold systems, magmatic Cu-Ni-PGE and construction materials. His project related experience includes grass-roots, green-fields reconnaissance programs, brownfields exploration and development programs, mine geology and modeling. He has developed innovative mapping techniques for regional and mine scale programs, has excellent computer skills and is an expert GIS for Geology practitioner.

Certification

Professional Geologist - Wisconsin and Arizona

Project Experience

Mining/Minerals - Related

·         Geological Mapping, Cobriza Area Exploration projects, Ayacucho, Peru.  Mapped lithology, structure, alteration and mineralization in porphyry Cu-skarn prospect. Logged exploration drill holes and designed and implemented follow-up drilling as part of deposit definition project. For The Doe Run Company.

·         43-101 Evaluation, Lemhi County, Idaho. Authored 43-101 certification document for Blackbird type Cu-Co prospect. For Toro Resources Corporation.

·         Geological Mapping, Tripp-Veteran Pit, Robinson Nevada Mining Company, Ely, Nevada, USA. Mapped lithology, structure, alteration and mineralization in a structurally disrupted porphyry copper deposit. Project undertaken to determine geological controls on ore and waste distributions, on geotechnical stability and to test and prove geological modeling based on drilling information. For Robinson Nevada Mining Company.

·         Geological Mapping, Cottonwood Peak Project, Elko County, Nevada, USA. Mapped lithologies, structure, alteration and mineralization in a volcanic hosted epithermal exploration project, managed geochemical and geophysical portions of the exploration project and prepared the project for drill testing in Spring, 2006. For Ventura Gold Corporation.

·         Geological Mapping, Midas District, Humboldt County, Nevada, USA.  Mapped lithologies, structure, alteration and mineralization in a 40-square km project area around a major epithermal gold district. Project undertaken to provide client with geological controls for future exploration projects. For Newmont Mining Company.

·         43-101 Evaluation, Humboldt County, Nevada, USA. Authored 43-101 certification document for Carlin-type gold property. For Nevada Mine Properties II, Inc.

·         Geotechnical and Geological logging, Eagle Cu-Ni-PGE deposit, Marquette County, Michigan, USA. Geotechnical and geological logging of drill core to determine rock mechanical characteristics and deposit modeling for newly discovered Magmatic Cu-Ni-PGE deposit. For Kennecott Mining Company

·         Partial Extraction Geochemical Survey, SW Bingham Canyon Project, Tooele County, Utah, USA. Undertook partial extraction geochemical survey and interpretation for client in area where natural and man-made contamination was expected. For Grand Central Silver Mines, Inc.

·         Porphyry Copper Exploration Program Technical Evaluation, SE Arizona, SW New Mexico, USA. Conceived and participated in the implementation of ongoing buried target program, involving geological mapping and interpretation, airborne and ground geophysics, total and partial extraction geochemistry. For BHP Billiton.

·         District and Regional Geological Consulting (Technical), Cobriza Cu Program, Peru. Undertook geological evaluation of concession holdings around the Cobriza Cu-Zn mine east central Peru. Mapping, field supervision of geophysical program, drilling and modeling for skarn and porphyry targets. For Doe Run Mining Company.

·         Reserve Delineation and Definition, Colgate Plant, Waukesha County, Wisconsin, USA. Supervised 10-hole drilling program designed to substantiate and prove mining reserve at large sand and gravel operation in suburban Milwaukee. Worked up sectional model and calculated mining reserve. For Lafarge-North America.

·         District Geological Mapping, Questa Molybdenum Mine, Taos County, New Mexico, USA. Re-mapped surface lithology, alteration and mineralization for the Questa mining district. Provided mapping constraint for re-modeled sectional geological interpretation and refined rock stability controls for slope stability studies. For SRK Consultants and for MolyCorp.

·         Reserve and Materials Volume Estimation, Central and Northeastern Wisconsin, USA. Determined reserves, built simple mining plans and developed DCFROR based financial evaluations for construction materials operators in Wisconsin and Michigan. For Rocky Mountain Enterprises, Gillett Cement Products, Inc., Pewabic East Partnership, Rising Rock, L.L.C., NorRok, Inc., Lincoln County Road Commission.

·         Permitting, Central and Northeastern Wisconsin, USA. Wrote reclamation and storm water permits, wetlands remediation plans, and special use permits for construction materials operators in Wisconsin. For +25-company client base.

·         Concession Evaluation, Tintaya, Peru. Led Tintaya concession minerals exploration activities and managed 30-person Spanish language office. Mapped 50 by 30 km area at 1:5000 scale, completed 5 ground EM and 3 geochemical surveys in 5 months and drilled and modeled 38 diamond drill holes. Released area around Antapaccay porphyry Cu-Au discovery for development and construction activities. Estimated concession mineral potential for long range planning purposes. Completed project ahead of time and under-budget. For BHP. 

·         Worldwide Diamond Exploration. Undertook exhaustive survey of South American Diamond occurrences, including fact-finding trip to Chile, Argentina, Uruguay and Brazil. For BHP.

·         San Carlos Apache Reservation Copper Exploration, Arizona, USA. Conceived and implemented exploration, contract negotiation, public and governmental affairs programs. Explored five priority areas for copper mineralization on the San Carlos Reservation. Negotiated a 30-percent reduction in contract terms and established working partnership with San Carlos Apache Tribal Office of Mineral Resources, Tribal Office of Economic Development and Tribal EPA. Represented company in quarterly oversight meetings with Tribal Natural Resources oversight board. Represented company in five public hearings called t o present results and proposed plans to Tribal members. For BHP.

·         AZSON Porphyry Copper Exploration Program, Arizona-New Mexico-Sonora. USA and Mexico. Identified and tested of 10 advanced exploration targets, participated in field trials for partial extraction geochemical and Geology from Geophysics techniques, participated in minerals policy negotiations with New Mexico State Land Office. For BHP.

·         Geological modeling, Ok Tedi Porphyry Copper Mine, Papau, New Guinea. Authored first geological interpretation model for control of mining operations at Ok Tedi Cu-Au mine in Papua New Guinea, increasing the operations capital efficiency and profitability. For Ok Tedi Mining Ltd.

·         Concession Evaluation, Mongolia. Geological evaluation, including mapping, geochemistry and geophysics for gold concession in southern Mongolia. Taught  Western hemisphere evaluation techniques and standards to resource evaluation group in Mongolia. For BHP.

·         Acquisition Evaluation Study, Twin Buttes Mine, Arizona, USA. Build ore-reserve model for Twin Buttes Mine for use by senior management strategic planning and acquisitions teams. For BHP.

·         Mine Geology and District Exploration, Pinos Altos Cu-Zn-Ag-Au skarn, New Mexico, USA. Mapped underground geology and developed ore control model for Pinos Altos polymetallic skarn. Participated in surface and underground exploration programs that lead to a 50-percent increase in ore reserves at Cyprus Pinos Altos mine. For Cyprus Mining Company.

·         El Abra Acquisition Evaluation, Chile. Mapped approximately one-fourth of the surface extent of the El Abra Porphyry Copper Prospect in northern Chile as part of acquisition evaluation team charged with determining up-side potential for grades and tonnes. For Cyprus Mining Company.

·         Evaluation of the Bagdad Porphyry Copper District, Arizona, USA. Mapped pit and district lithology, structure and alteration and determined the exploration potential for the Bagdad district. For Cyprus Mining Company.

·         Property Exploration and Reserve Calculation, California, USA. Property mapping, drilling and sectional reserve calculation for mesothermal shear-zone hosted, greenstone-type gold deposits in historic Mother Lode region of California. For Meridian Gold Corporation and for Gold Fields Mining Corporation.

·         Geological Investigations, Ph. D. Study, Chimney Creek Carlin-type Gold Deposit, Nevada, USA. Mapped outcrop lithology, structure, alteration and mineralization over approximately 10 square km property centered on the Chimney Creek Carlin-type gold deposit. Logged 30-plus core holes within and adjacent to the deposit and examined isotopic, radiogenic, fluid inclusion and geochemical constraints. Developed genetic model and determined salient ore controls. For Gold Fields Mining Corporation and the University of Arizona. \

Professional Employment History

Geological Consultant (present)

Principal Geoscientist, BHP, Tucson, Arizona, USA (1994-2001)

Senior Geologist, Cyprus Mining Company, Tucson, Arizona USA (1990-1994)

Consulting Geologist, Meridian Gold Company, Sutter Creek, California (1989)

Geologist, Gold Fields Mining Corporation (1981-1989)

Education

Ph.D., Geology, (Economic Geology) - University of Arizona (1990)

M.S., Geology - University of Minnesota (1983)

B.S., Geology, University of Wisconsin (1979)

Professional Affiliations

Society of Economic Geologists

Arizona Geological Society

American Association of Petroleum Geologists

Professional Development/Continuing Education

Exploration Management Course II, Andrew White and Associates Geelong, Victoria, Australia

Economic Evaluation and Analysis, Tucson, AZ

Global Leadership Program I, Hong Kong

Management Training Workshop, Scottsdale, AZ

Diamonds Workshop, Kelowna, B.C.

GIS for Geologists, Tucson, AZ

Advanced GIS for Geologists, Denver, CO

Iron Oxide Copper Gold, Stratiform copper and Mt. Isa-type deposits, Golden CO

EM for Geologists, Tucson, AZ

Aeromagnetic Imaging and Interpretation, Denver CO

Geosoft Oasis Montaj, Golden, CO

Arcview GIS, Tucson, AZ

Mine Safety and Health Administration

Gearld F. (Jerry) Willis, M.Sc.

Address                                                                

14 Tavalopa Road
Los Lunas , NM 87031
505-977-5945
jerrywillis@minemappers.com

Expertise

Mr. Jerry Willis has worked for thirty-one years in the mining industry, including twenty years in positions of increasing responsibility at operating mines. He has expertise and experience in shear zone and volcanogenic gold deposits, epithermal gold and Carlin-type gold systems, magmatic Cu-Ni-PGE's, Skarn hosted systems and porphyry copper systems. His project related experience includes mine geology, reserve base management and grass-roots exploration and development programs. He has developed innovative mapping techniques for regional and mine scale programs resulting in significant increases ore reserves and new approaches to district-wide mineral exploration.

Project Experience

Mining/Minerals - Related

·         Project Management,  Magdalena, New Mexico.  Directed preliminary drilling and evaluation of ledge type uranium occurrence in the Riley-Datl uranium district. For Max Resources.

·         Geological Mapping, Gold Gulch Exploration Project,  Morenci District,  Arizona. Mapped lithology, structure, alteration and mineralization in potential copper-gold skarn setting. Directed geochemical sampling and ground geophysical surveys to aid in target delineation and drill site location. For Ventura Gold Corporation.

·         Geological Mapping, Cobriza Area Exploration projects, Ayacucho, Peru.  Mapped lithology, structure, alteration and mineralization in porphyry Cu-skarn prospect. Logged exploration drill holes and designed and implemented follow-up drilling as part of deposit definition project. For the Doe Run Company.

·         Geological Mapping, Tripp-Veteran Pit, Robinson Nevada Mining Company, Ely, Nevada , USA.  Mapped lithology, structure, alteration and mineralization in a structurally disrupted porphyry copper deposit. Project undertaken to determine geological controls on ore and waste distributions, on geotechnical stability and to test and prove geological modeling based on drilling information. For Robinson Nevada Mining Company.

·         Geological Mapping, Cottonwood Peak Project, Elko County , Nevada , USA.   Mapped lithologies, structure, alteration and mineralization in a volcanic hosted epithermal exploration project, managed geochemical and geophysical portions of the exploration project and prepared the project for drill testing in Winter, 2006/2007. For Ventura Gold Corporation.

·         Geological Mapping, Midas District, Humboldt County , Nevada , USA .  Mapped lithologies, structure, alteration and mineralization in a 40-square km project area around a major epithermal gold district. Project undertaken to provide client with geological controls for future exploration projects. For Newmont Mining Company.

·         Geotechnical and Geological logging, Eagle Cu-Ni-PGE deposit, Marquette County, Michigan, USA . Geotechnical and geological logging of drill core to determine rock mechanical characteristics and deposit modeling for newly discovered magmatic Cu-Ni-PGE deposit. For Kennecott Mining Company

·         Partial Extraction Geochemical Survey, SW Bingham Canyon Project, Tooele County , Utah , USA . Undertook partial extraction geochemical survey and interpretation for client in area where natural and man-made contamination was expected. For Grand Central Silver Mines, Inc.

·         Reserve Base Evaluation, Mesquite Au Mine, Imperial County , California , USA . Undertook critical evaluation of mine block and ore-control model for mature mine. Examined modeling methodology, geotechnical systematics and controls, reserve base and resource evaluation plans. Project undertaken to provide input for asset financial evaluation.

·         GD Resources/Triangle Minerals, Winnemucca , Nevada , USA . Managed all aspects of US and International mineral exploration, relying on grass roots research as to preferred methods of operation for precious metal and gemstone extraction and sale on the international market.

·         District Exploration, Twin Creeks Property, Humboldt County , Nevada , USA . Supervised district exploration, development and production geology, and modeling for Carlin-type deposits in the Twin Creeks Mine area.

·         Mine Geology and District Exploration, Mesquite Mine, Imperial County , California , USA . Responsible for mine geology, modeling and resource development for Southern California and Arizona .

·         Property Exploration and Reserve Calculation, Battle Mountain-Eureka Trend , Nevada , USA . Managed exploration for Carlin-type and gold skarn deposits along this highly productive, mineralized region.

·         Mine Geology, Ortiz Mine, Santa Fe County , New Mexico , USA . Conducted district-wide mineral exploration and mine mapping and reserve calculation in gold bearing breccia pipe and skarn setting.

·         Anaconda Copper Company, Stillwater Complex , Montana , USA . Directed Basal Zone Ni-Cu exploration and drilling. Participated in surface and underground exploration, and pre-development of the JM Reef-PGE deposit.

·         US Bureau of Mines, Federal Center , Lakewood , Colorado , USA . Evaluation of mineral potential on Bureau of Land Management “Instant Study” Wilderness Areas.

·         Burlington Northern Railroad, Billings , Montana , USA . Exploration for base, precious metal and uranium deposits on the land holdings of the Burlington Northern Railway in Montana , Idaho , Washington and Oregon .

·         Johns Manville Stillwater Corporation, Stillwater Complex , Montana , USA . Participated in grass-roots exploration that led to the discovery of the JM Reef-PGE deposit in the layered intrusive Stillwater Complex.

·         Geological Investigations, M. Sc. Study, Geology of the Birch Creek Molybdenite Prospect, Pioneer Mountains , Montana , USA . Conducted detailed geologic mapping and evaluation of raw molybdenite prospect. Project funded by AMAX Exploration, Helena , Montana , USA .

Professional Employment History

            Geological Consultant (1998-present)

            Exploration Manager, Triangle Minerals (1997-1998)

            District Exploration Manager, Santa Fe Pacific Gold Corporation (1992-1997)

            Project Geologist/Chief Geologist/District Manager, Gold Fields Mining Corporation (1980-1992)

            Geologist, Anaconda Copper Company (1979-1980)

            Geologist, Field season and part-time, Johns-Manville Stillwater Corporation, AMAX, Burlington Northern Railroad, US Bureau of Mines               

            (1974-1979)           

Education

B.S. Geology - Boise State University (1976)  

M.S. Economic Geology - University of Montana (1978) 

Selected Publications

Willis, G. F., 1988a, Geology and mineralization of the Mesquite open pit gold mine, in Schafer, R. W., Cooper, J. J., and Vikre, P.G., eds., Bulk mineable precious metal deposits of the Western United States: Geologic Society of Nevada Symposium Proceedings, 1987, p. 473-486.

Willis, G. F., 1988b, Geology of the Big Chief orebody, Mesquite district, Imperial County, California: Society of Mining Engineers Preprint, no. 88-16, 6p.

Willis, G. F., Tosdal, R. M., and Manske, S. L., 1987, The Mesquite mine, southeastern California: Epithermal gold mineralization in a strike-slip fault system (abs.): Geologic Society of America Abstracts with Programs, v. 19, p. 892.

Willis, G. F., Tosdal, R. M., and Manske, S. L., 1989, Structural control on epithermal gold veins and breccias in the Mesquite district, southeastern California (abs.): U. S. Geologic Survey Circular 1035, p. 78.

Willis, G. F., and Tosdal, R. M., 1992, Formation of gold veins and breccias during dextral strike-slip faulting in the Mesquite district, southeastern California: Economic Geology, Vol. 87, pp. 2002-2022.

Additional publication titles available upon request.

Professional Development/Continuing Education

Structural Geology of the Walker Lane, Western Nevada, John Oldow, University of Nevada Reno, Continuing Education

Isotope Lab training, USGS, Menlo Park, California

Management Skills For Supervisors, Maddux Associates

Essential Skills of Supervision, Systems Four Associates

Avoidance of Management Liabilities in the Workplace, Management Associated Results Co.

Management Action Response, Management Associated Results Co.

Safety Training Observation Program (STOP), DuPont

Leadership Performance System, De La Porte Associates

Business, Employee and Personal Management, Center for Executive Management

GIS for Geologists, Tucson , AZ

Mine Safety and Health Administration Training

Expertise

Dr. Osterberg is a senior geoscientist with diversified experience in field investigations, applied research, and project management in the minerals and consulting industries.  His expertise includes application of geologic, hydrogeologic, geochemical, and geophysical studies to earth science problems including minerals exploration and development, groundwater investigations, environmental studies, water balance analysis, and mining reclamation-related geologic studies.  He is experienced in mapping and evaluation of multiple ore deposit types including volcanogenic massive sulfides, Iron Oxide-Cu-Au, mesothermal and epithermal gold systems, magmatic Cu-Ni-PGE, porphyry copper, and diamonds.  Dr. Osterberg is based in Denver , Colorado .

Certification

Professional Geologist - Wisconsin , Wyoming , and Arizona

Project Experience

Mining/Minerals - Related

•       Mineral Potential Analysis, Boss-Bixby Iron-Copper-Gold Deposit, SE Missouri, U.S.A.  Detailed lithologic assessment of drill core, geochemical, and geophysical data on a historic Proterozoic iron oxide-copper-gold system in mid-continent USA resulting in approximate doubling of historic-recognized resource and recognition of untested potential for further expansion.  For The Doe Run Company.

•            Project Management & Geological Mapping, Cobriza Area Porphyry Copper/Skarn Exploration Projects, Ayacucho , Peru . Provided on-site project management for porphyry Cu-skarn prospect.  Assisted with project-level geologic mapping, drilling management, and core logging including structure, alteration and mineralization, and ArcGIS compilations.  For the Doe Run Company.

•          Epithermal Gold Geochemical Sampling, Cottonwood Peak Project, Elko County , Nevada , USA . Assisted with completion of geochemical survey of a volcanic hosted epithermal precious metals exploration project.  For Ventura Gold Corporation.

•           Geological Mapping, Midas District Epithermal Gold, Humboldt County , Nevada , USA .  Geologic mapping around in the epithermal gold-silver district with emphasis on recognition of volcanic stratigraphy, alteration, paleovolcanic hydrothermal structures, volcanic facies, and late structural controls on mineralization.  Field and follow-up ArcGis compilation, including development of cross-section folio series designed to identify critical geological controls on mineralization as a guide for on-going exploration projects. For Newmont Mining Company.

•           Geotechnical Core Logging, Eagle Magmatic Cu-Ni-PGE deposit, Marquette County, Michigan, USA .  Diamond drill geotechnical core logging for collection and documentation of rock mechanical data critical for mine modeling and planning.  For Kennecott Mining Company

•           Geologic Mapping and Lithochemical investigations, Volcanogenic Massive Sulfide and Epithermal Systems, Northwestern, Ontario .  Completed detailed physical volcanological facies field-mapping, stratigraphic, alteration, and metamorphic analysis for recognition of critical paleovolcanic controls on massive sulfide development.   Work completed at Winston Lake Mine, and several exploration projects.   For Minnova, Inc., Geological Survey of Canada , Univ. of Minnesota , Duluth .

•            Iron Oxide-Copper-Gold Investigations and Reviews, Midwestern and Western U.S.A., Canada , Bolivia , Brazil , Australia , and Sweden .  Completed geologic and geochemical investigations of iron oxide-associated base and precious minerals, and uranium in five regions with local follow up studies.  Conducted site visits to several major world-wide mines and other occurrences including:  Salobo , Brazil ; Ernst Henry and Olympic Dam , Australia ; Kiruanavara , Sweden ; Jurassic, Nevada , and Mid-continent USA; and paper reviews of most other world-wide IOCG occurrences.  For BHP Minerals.

•            Regional Mineral Potential Evaluation Project, Midcontinent U.S.A.   Completed field review and exploration potential analysis of southeast Missouri metallogenic districts.  For Western Mining Corporation.

•           Polymetallic Mineral Resource Potential Evaluation, North America .  Developed and completed base (VMS, SEDEX, BHT) and precious metals (mesothermal gold), uranium, and diamond exploration programs for base metals, and mineral potential evaluations across North America and internationally. Evaluations included regional and local geologic, geophysical, and geochemical compilations and terrane evaluations.  For BHP Minerals.

•           Evaluation of Pederson Sediment-hosted Gold Project, Bolivia .  Led independent project review to assess potential for economic gold mineralization.  Evaluation included detailed geologic mapping and structural analysis of controls on disseminated gold mineralization.  For BHP Minerals.

•            Contract Geologist, Various Locations, U.S.A. and Canada .  Completed regional and detailed bedrock and alluvial geologic mapping, soil, rock, and water geochemical surveys; extensive drill-core logging; and surface and borehole geophysical surveys to conclusively test precious, base, and uranium metals projects.  Completed preliminary resource tonnage analyses.  For Minnova, Inc.; Noranda, Inc.; Kerr-McGee; and St. Joe American Corp.

•           Geological Logging, Misery Kimberlite Pipe , Northwest Territories , Canada .  Logged drill cuttings during definition drilling on major diamondiferous occurrence in the Lac de Gras area.  Logging including identification and cataloging of indicator minerals and gangue materials.  For BHP Minerals.

•            IPO Prospectus Development , St. Joe Minerals, Colorado , USA .  Provided assistance in writing and preparation of technical documents related to proposed public listing.  Included technical review and preparation of descriptive documents on Iron Oxide-Copper-Gold, MVT-Zinc, Porphyry Cu/Skarn, and Sediment-hosted Gold occurrences.  For St. Joe Minerals.

•            Metallic Minerals and Diamonds Assessments, Western USA .  Completed GIS-based assessments of precious and base metal ( Nevada , Wyoming ) potential, and diamonds ( Wyoming ) in Western USA including geologic, geophysical, and geochemical parameters, along with public and private land status assessments.  For BHP Minerals, St. Joe Minerals, and The Doe Run Company.

•            Hydrogeologic Analysis of Discharge Options for Mine Process Wastewater, Minahasa Raya Mine, Indonesia .  Project Manager and geologic-hydrogeologic technical lead investigator for site characterization and development of options for long-term management of heap leach discharge waters.  For PT Newmont Minahasa Raya, North Sulawesi, Indonesia . 

•             Baseline Hydrologic Characterizations, Monitoring Network, Water Supply Analysis, Water Balance Assessments for EIAA and Feasibility Design Documents, San Bartolome Project, Bolivia.  Completed field and follow-up investigations related to fast-track development of EIAA and ALBA environmental permit documents, and feasibility design report for mine development.  Investigations were directed at geologic, geophysical, geotechnical, hydrogeologic, and geochemical characterization, including robust water balance anlaysis of proposed tailings storage facility and plant site areas.  For Coeur d’Alene Mines and Smith Williams Consultants, Inc., Potosi , Bolivia .

•             Hydrogeologic Analysis, Water Supply Development, and Aquifer and Vadose Zone Characterization and Monitoring Analysis, Bald Mountain Mine , Nevada , U.S.A.   Completed comprehensive compilation of geologic, hydrogeologic, and chemical data from previous investigations and follow-up field investigations directed at development of a new high capacity groundwater supply and delivery system for mine expansion.  Completed geotechnical and geochemical evaluation of vadose zone materials to assess potential for migration of leach pad contaminants into groundwater from hypothetical leaking leach pads.   For Placer Dome U.S. , Nevada .

•            White Paper Review of Surface and Underground Dewatering Technologies, Cortez Hills Project , Nevada , U.S.A.   Supported overview analysis of surface and underground dewatering technologies for construction and operation purposes.  Analysis provided basis for selection of techniques most applicable to new mine development at Cortez Hills.  For Cortez Gold Mine.

•          Technical Review of Hydrogeologic Aquifer Analyses and Groundwater Uranium Contamination, Dawn Mining Company, Washington , U.S.A.   Completed independent review and evaluation of hydrogeologic modeling of alluvial aquifer at uranium tailings storage facility.  Results were incorporated into design for in-situ biochemical treatment of groundwater contamination.  For Dawn Mining Company, Ford, Washington.

•           Technical Review of “Extent of Contaminant Groundwaters Hydrologic Analysis”, Western U.S.A.   Completed independent review of a basin-wide hydrologic model incorporating monitoring and pumping well data that was developed to characterize groundwater flow through a complex alluvial aquifer extensively impacted by mine tailings and waste rock.  For confidential client, Arizona .

•             Hydrogeologic Investigations, Water Supply Development and Environmental Studies, San Cristóbal Project, Nor Lípez Province , Bolivia .  Designed and completed geologic and hydrogeologic and geochemical investigations directed at identification, and testing of potential wellfield water supply to support development and operation of a major Ag-Zn-Pb deposit in development.  Developed water treatment options, reservoir siting, analysis of wastewater disposal options, and completed baseline EIAA studies.  For Apex Silver Mines, Colorado .

•          Maqui Maqui Pit Lake Study and Conceptual Pit Closure Plan , Peru .  Completed hydrogeologic-geochemical evaluations of the Maqui Maqui Norte and Sur Pits for development of a conceptual plan for pit reclamation and permanent closure.  For Minera Yanacocha S.R.L.

•           Mina Antamina Pit Lake Hydrogeologic and Hydrochemical Investigation, Peru .  Project manager and geologic-hydrogeologic technical leader for predictive analysis of pit in-filling after mining, including pit lake water quality.  For Compania Minera Antamina

•             Hydrologic Characterization and Prediction of Groundwater Quality and Quantity, Homestake Mine , South Dakota , U.S.A.   Supported hydrologic characterization and development of water management plan for closure of  the historic Homestake Mine.  For Homestake Mining Co.

•             Mineral Potential Review , Colorado , U.S.A.   Completed resource analysis of gas, oil, metallic, coal, and coal bed methane potential for properties within the Denver Basin in Arapaho County , CO as part of due-diligence review for property sale.  For Murphy Family Trust.

•          Hydrogeological Analysis of Groundwater Discharge, Pallca Mine Project, Department of Anchash , Peru .  Develop a predictive analysis of groundwater discharge quantity from a proposed underground polymetallic sulfide mine based on assessment of geologic and hydrogeologic information, mine development plans, estimation of surface infiltration, and impacts of karstic conditions.  For Mitsui Mining and Smelting Company.

•          Mine Site Construction Quality Assurance, Round Mountain Gold Mine, Nevada .  Completed engineering inspection oversite to contractors during construction of major leach pad facility.  For Round Mountain Gold.

Groundwater/Environmental-Related

•            Groundwater Exploration and Resource Evaluation, Front Range of Colorado , U.S.A.   Compilation and evaluation of geologic and hydrogeologic data and historic borehole geophysical data used in evaluation of confined aquifer potential for proposed Front Range water supply development studies.  For confidential client, Colorado .

•            Annual Groundwater Monitoring Report Preparation—Chromium, Nitrate, and VOC Contaminated Site, Dodge City , Kansas .  Compilation, analysis, and report preparation of RCRA site annual groundwater monitoring report for compliance with Kansas Department of Health and Environment and USEPA requirements.  For Koch Nitrogen Company.

•            Aquifer Characterization and Sampling for PCE and 1-4 Dioxane Contamination, Colorado .  Hydrogeologic characterization of PCE Plume within the Widefield Aquifer near Willows Springs Ponds to assess groundwater inflow into fisheries resource.  For El Paso County .

•            Hydrogeologic Analysis of Groundwater Contamination, Nevada , U.S.A.   Litigation support through completion of technical and time-line analysis of organic contaminant source in local groundwater supplies for identification of responsible party.  For confidential client, Nevada .

•       Water Resources Investigation, Arkansas River Basin , Colorado , U.S.A.   Directed geologic, hydrogeologic and geophysical field investigations to locate and test a high-capacity (585 gallons per minute [gpm]) pilot test well for expansion of the water supply to the Buena Vista state fish hatchery. Developed GIS-based Groundwater Monitoring Protocol.  For the State of Colorado , Division of Wildlife.

•