PROJECT EXPERIENCE - HYDROGEOLOGIC MODELING PROJECTS

The following is a partial list of HydroGeo's experience in hydrogeologic modeling projects:

  • TETRA TECH, INC., BLM, USFS, AND AGRIUM, INC., HUSKY 1 NORTH DRY RIDGE PHOSPHATE MINE, EIS, Caribou County, Idaho. Development of a complex regional numeric groundwater flow and contaminant transport model for a proposed potash mine using the model codes MODFLOW-NWT and UZF-MT3DMS. The model will be used to assess potential environmental impacts for the surface and groundwater sections of an EIS for the Pocatello Field Office of the BLM and the U.S. Forest Service, Caribou-Targhee National Forest, Soda Springs Ranger District, Idaho. (In Progress)
  • ICF INTERNATIONAL, BLM, ENCANA OIL AND GAS, AND CONOCO PHILLIPS, MONETA DIVIDE OIL AND GAS DEVELOPMENT PROJECT, EIS, Fremont and Natrona Counties, Wyoming. Developing a regional watershed model using the Kinematic Runoff and Erosion Model (KINEROS2) and SWAT (Soil and Water Assessment Tool), developed by the U.S. Department of Agriculture (USDA). This model will be used to assess potential environmental impacts for the surface and groundwater sections of an EIS for the Lander and Casper Field Offices of the BLM. (In Progress)
  • ALASKA GOLD COMPANY, NOVAGOLD, ROCK CREEK MINE, Nome, Alaska. Developed a new groundwater injection system and completed a ground water flow model (MODFLOW) to help in the water management and water balance for the entire mine including the tailing disposal site, open pit mine and ground water injection system. The model is currently be used to assist with the closure design for the tailings storage facility. HydroGeo also assisted in the redesigned a stormwater diversion ditch to alleviate sediment discharge issues.
  • KINROSS GOLD USA, KETTLE RIVER OPERATIONS, Washington. Developed numerical ground water flow and contaminant transport model using MODFLOW and MT3DM codes. The model was used to assess potential hydrologic impacts at the Kettle River Tailing Facility and Key Mill Site and to evaluate AKART remediation methods.
  • WESTPORT RESOURCES, CARDINAL DRAW CBM PROJECT, Price, Utah. Analytical ground water flow modeling to assess potential hydrologic effects of pumping CBM wells and injecting produced water into the Navajo Entrada aquifer.
  • U.S. FOREST SERVICE, MONTANORE PROJECT, Kootenai National Forest Montana. Completed a Peer Review of the conceptual and numerical ground water models for the Montanore ENVIRONMENTAL IMPACT STATEMENT for the USFS.
  • TRC MARIAH, AND BLM, JONAH AND SOUTH PINEY PROJECTS, Sublette County, Wyoming. Completed Ground water modeling (MODFLOW) and watershed modeling studies using the Kinematic Runoff and Erosion Model (KINEROS2), developed by the U.S. Department of Agriculture (USDA). These studies were used to access potential environmental impact for surface water sections of two Environmental Impact Statements, for the Pinedale field office of the BLM.
  • ANADARKO PETROLEUM CORPORATION, Carbon County, Wyoming. Completed a Ground Water Technical Report for the Hanna Draw Coal Bed Natural Gas Pilot Project. The study analyzed potential ground water drawdown changes to the area and losses to local wells and springs resulting from project operations and cumulative impacts from other area projects using a three dimensional model (MODFLOW).
  • ANADARKO PETROLEUM CORPORATION, Carbon County, Wyoming. Completed a Surface Water Technical Report for the Hanna Draw Coal Bed Natural Gas Pilot Project. The study analyzed potential flow and chemical (salinity) changes to Seminoe Reservoir and the North Platte River resulting from project operations and cumulative impacts from other area projects using a site specific mixing model developed by the EPA.
  • COEUR ROCHESTER, ROCHESTER MINE, Nevada. Completed a numerical ground water flow and contaminant transport model (MODFLOW & MT3DM) of the mine area to evaluate the extent at current and future contaminant plumes, and to assess the best available technology to remediate the site.
  • THREE OAKS MINE EXPANSION PROJECT, ALCOA ALUMINUM COMPANY, SAN ANTONIO, TEXAS Developed local and regional 3D MODFLOW ground water flow models for support of the Three Oak Mine Expansion Project EIS. The models were designed to assess the potential impact of mine dewatering on local and regional ground water resources and endangered species habitats.
  • SOAPA MINE EXPANSION PROJECT, NEWMONT GOLD COMPANY AND BLM, ELKO, NEVADA - Reviewed and verified a complex regional 3D ground water flow model and code (MINEDW) and completed surface and ground water sections of the environmental impact statement for the project.
  • CUMULATIVE IMPACT STUDY, HUMBOLDT RIVER SYSTEM, BLM, ELKO, NEVADA - Reviewed and verified a complex regional 3D ground water flow model and code (MINEDW) and completed hydrogeology sections of the document. This document was used in support of Newmont's the West Leesville Mine and SOAPA EISs, and Barrick's Post-Betze Mine EIS.
  • MINERA ALUMBRERA, LTD, ALUMBRERA PROJECT, ARGENTINA - Reviewed a regional MODFLOW model developed by an Argentine consulting company for the project.
  • COGEMA RESOURCES MIDWEST PROJECT, SASKATCHEWAN - Developed a 3D MODFLOW model of hydrogeologic system, to determine mine water inflow volumes and sources. The model was developed based on geologic borehole logging and down-hole testing of hydraulic conductivity in newly completed deep wells. A major EIS supporting document on hydrogeology of the ore deposit was prepare for submission to AEC.
  • ALTA GOLD COPPER FLAT PROJECT, NEW MEXICO - Compiled three decades of historical project-area well data, created, calibrated, and ran a 3D finite element groundwater model to predict the effects of mining on local and regional hydrology. Field investigations were performed to provide model input and monitoring data, including drilling, packer-testing, and completing bedrock wells, conducting several aquifer pumping tests in alluvial wells, and sampling wells and surface water bodies.
  • FLUOR DANIEL, BATU HIJAU PROJECT, INDONESIA - Developed a finite difference (MODFLOW) ground water model to simulate a pumping well field in a shoestring alluvial aquifer. Model results were used to design a water supply well field for the mine and to predict the effects of pumping on surface water resources. The potential for seawater incursion into the aquifer was also evaluated. Model results were in good agreement with the installed well field.
  • MINERA ALUMBRERA, LTD, ALUMBRERA PROJECT, ARGENTINA - Completed a MODFLOW model to the Campo Arenal well field. The model was used to design the well field, and assess potential impact from long term pumping on local and regional water resources. The model was used in support of the project's EIA (environmental impact assessment) and permitting.
  • MINERA ALUMBRERA, LTD, ALUMBRERA PROJECT, ARGENTINA - Completed a regional ground water flow and contaminant transport model (MODFLOW and MT3D) for the Alumbrera mine facilities, including the open pit, plant site, and tailings impoundment. The model was used to assess potential impacts of the project and was used in support of the project's EIA (environmental impact assessment) and permitting.
  • FLUOR DANIEL, MINERA ALUMBRERA PROJECT, ARGENTINA - Performed ground water flow modeling (MODFLOW) for the Tailings Impoundment Pump Back System. Project work also included the design, installation, and testing of the well field. Nine large diameter extraction wells were installed to depths of 200 meters.
  • MINERA ALUMBRERA, LTD, ALUMBRERA PROJECT, ARGENTINA - Developed predictive geochemical model for post-mining flooding of the Alumbrera Open Pit.
  • SOCIEDAD MINERIA EL BROCAL, EL BROCAL MINE, PERU - Developed a finite-difference (MODFLOW) ground water flow model to predict inflow to the planned open pit. The effectiveness of using surface extraction wells to dewater the mine was evaluated along with the potential impacts to surface water resources.
  • SOUTHERN PERÚ COPPER CORPORATION, PERÚ - Reviewed and audited surface and ground water monitoring network for Toquapala and Cuajone mines, and SPCC smelter and port facilities. Presented short courses for design of ground water monitoring networks, ground water modeling, and geochemical modeling.
  • ZAMBIA CONSOLIDATED COPPER MINES, LTD, KONKOLA MINE, ZAMBIA - Developed and calibrated a 3D finite element MODFLOW model for mine dewatering and provided recommendations for future dewatering strategies for the Konkola underground copper mine. The Konkola mine is one of the wettest mines in the world and dewatering is a major cost consideration. The mine is located on the Zambian Copperbelt.
  • ALTA GOLD COPPER FLAT PROJECT, NEW MEXICO - Developed and calibrated a regional 3D finite element groundwater flow model (MODFLOW) to predict the effects of well field pumping and open pit mining on local and regional hydrology. Three decades of historical project data were compiled for the development of the model. Modeling results were incorporated into the EIS for new mine operation, and presented in public hearings before the state board.
  • BARRICK GOLDSTRIKE MINES, BETZE-SCREAMER PIT, NEVADA - Reviewed the TRC geochemical pit lake model for Betze-Screamer Pit.
  • BARRICK GOLDSTRIKE MINE, NEVADA - Geochemical modeling of sorption and mineral precipitation/ dissolution reactions for the Betze-Screamer Pit Lake. Particular emphasis was placed on modeling the sorption behavior of arsenic to precipitating ferrihydrite using the program PHREEQC and a modified MINTEQA2 thermodynamic database.
  • LAC MINERALS U.S.A., ORTIZ MINE, NEW MEXICO - Developed a predictive geochemical model for the Ortiz Pit Lake. Equilibrium methods were used to identify and constrain geochemical controls of the pit lake water composition. The model incorporated humidity cell, acid-base accounting, XRD, microprobe and limnologic data to estimate the long-term water quality. Chemical profiles were developed from samples collected at various depths to investigate the potential for stratification of the lake.
  • LAC MINERALS U.S.A., COLISEUM MINE, CALIFORNIA - Developed a predictive geochemical model for closure of the Coliseum Pit Lake. The model used equilibrium methods to identify and constrain geochemical controls of pit lake water quality, and incorporated humidity cell, acid-base accounting, and whole rock geochemical data. Chemical profiles were developed to investigate the potential for stratification of the lake.
  • ECHO BAY MINERALS COMPANY, KEY WEST MINE, WASHINGTON - - Developed a predictive geochemical model for the Key West Pit Lake. Equilibrium methods were used to identify and constrain geochemical controls of pit lake water quality. The study incorporated humidity cell, acid-base accounting, and whole rock geochemical data.
  • ECHO BAY MINERALS COMPANY, KEY MILL AND TAILING FACILITY, WASHINGTON - Developed a predictive geochemical model for the Key Mill and Tailings Facility. The study incorporated seepage and attenuation tests and modeling to determine the transport and fate of cyanide in the case of leaks or spills at the facility. Results of the study were incorporated into the record of decision from the BLM and WDOE.
  • ECHO BAY MINERALS COMPANY, KEY MILL AND TAILING FACILITY, WASHINGTON - Hydro-chemical analysis and impact assessment of expansion of the Kettle River Tailings Facility and other potential sources of contamination at the Key Mill Site.
  • HECLA MINING COMPANY, ROSEBUD MINE, NEVADA - Performed a hydrogeologic characterization of the project area, and evaluated the potential impacts to ground water quality from underground mining. Predictions for post-mining water quality were made based on equilibrium modeling and kinetic data. The final report was included as an appendix to the Environmental Assessment (EA).
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