HydroGeoLogica, Inc. provides consulting services in the geologic, hydrogeologic and hydrogeochemical sciences with a focus on mine water and mine waste management. The company was founded by Anita Johnson in Golden, Colorado in 2007 and has grown to include a team of hydrogeologists and geochemists with a breadth and depth of experience in addressing challenges posed to surface and undergound mines around the world, in all climatic conditions.
anita johnson
Anita Johnson is a hydrogeologist with 30+ years of professional experience in environmental consulting and mine water management. Raised and educated in the UK, she is the owner of HydroGeoLogica, Inc, and has worked in Europe, North America, Central and South America, and Asia during her career.
Anita has a B.Sc. in environmental science and an M.Sc. in hydrogeology. Her career in consulting has lead her to specialize in site-specific water balances for industrial, environmental, and mining applications using either visual dynamic systems (GoldSim) or spreadsheets. She is also experienced in the design and implementation of surface water and groundwater investigations and development of water management systems for a variety of sites, primarily mine related. She has extensive experience in aquifer testing design, implementation and analysis, and provides peer review on these subjects.
brent johnson
Brent Johnson is a professional geologist with 30+ years of consulting experience in hydrology, geochemistry, water quality prediction and management. His formal education is in geology, Spanish, international development and geochemistry, with degrees from Virginia Tech, American University and the University of Colorado, Boulder.
Brent conducts hydrogeologic and geochemical studies for all phases of projects including feasibility, permitting, baseline studies, water use optimization, reclamation, and source control.
Brent is familiar with Equator Principals, the International Cyanide Code, and ICMM’s water guidelines. He is experienced in hydrogeologic characterization, saturated and unsaturated groundwater flow modeling, seepage modeling for dams and cover/liner systems. He also has extensive experience in aqueous geochemistry, ARD and metals chemistry, and developing innovative approaches to managing water quality issues.
Mr. Johnson has worked extensively at sites around the world including Asia, Africa, North and South America, and Europe, from tropical to northern latitude conditions, and he is fluent in English and Spanish.
mary ellen wickham
Mary Ellen Wickham is a geoscientist with extensive experience in water resources planning, conservation, and hydrogeology. After obtaining a BSc in Geology from Bowling Green State University, her career began in the desert southwest, preserving groundwater resources while developing conservation programs and water policy, and working in regulatory compliance. Additionally, Mary Ellen has worked on various environmental investigations for water and energy projects, including hydrogeologic characterization, carbon sequestration, coal, and geothermal. She has been an integral team member in both the public and private sectors providing extensive administrative and technical support.
In addition to providing technical support for HydroGeoLogica’s projects, Mary Ellen performs business management and accounting.
Daniel Weber
Daniel Weber is a hydrogeologist and project manager with over 30 years of experience characterizing groundwater resources. His expertise includes managing groundwater exploration projects, analyzing aquifer hydraulic parameters and hydrochemistry, and assessing managed aquifer recharge for municipal, industrial, and mining clients. He has designed and led groundwater exploration programs and groundwater modeling investigations ranging from scoping/conceptual studies to design/build, developing water supplies for mining operations, characterizing in situ recovery operations for copper, and designing long-term groundwater monitoring programs for the full life-cycle of mining and industrial projects.
Distinguishing specialties include conceptual site modeling, water well design, testing, and logging, field management of groundwater exploration and aquifer testing programs, and groundwater sampling and reporting for regulatory compliance.
ANDY WICKHAM
Andy Wickham completed his BSc in Geology at Colorado State University, and earned his MSc in Exploration Geochemistry at University of British Columbia. Andy conducts geochemical characterization studies (static and kinetic) for waste rock, tailings, spent ore, and borrow material. He has developed sampling and analysis plans, representative sample selection, validating and interpreting analytical results, and compiling summary reports within context of local regulations and project scope.
Geochemical modelling experience includes PHREEQC and Geochemist’s Workbench to predict water quality for mine sites, evaluate scaling risks, estimate water quality impacts related to lime waste disposal, and optimize municipal water treatment systems..
Andy also has field experience sampling monitoring wells, lysimeters, and gas monitoring at test plots at active tailings and waste rock facilities.
DEXTER RACE
Dexter Race is a hydrogeologist with 13 years of experience in project management and field program oversight for exploration and well drilling in the mining and oil and gas industries. He completed his BA in geosciences with a thesis in drilling and well development at Hamilton College in upstate New York.
A strong background in surface and underground mining operations has allowed Dexter to support large clients as a consulting hydrogeologist. Dexter has developed and managed drilling programs for exploration, production, water monitoring and dewatering projects in Nevada, Arizona, Idaho, Utah, and New York. He has developed and implemented seeps and springs studies, water quality sampling plans and groundwater monitoring infrastructure for large exploration and production projects focused in Nevada.
Dexter also has significant experience with Vibrating Wire Piezometer planning, installation and monitoring in wells up to 7,000 plus feet deep in both surface and underground operations. He has focused primarily on drilling operations in exploration, production, and monitoring wells in recent years to help clients successfully implement drilling programs with a wide range of contractors and drilling technologies.
EMILY FRISBEE
Emily Frisbee is a hydrogeologist and groundwater modeler with 15 years of experience in water resources, water rights litigation, and hydrogeologic investigations. She completed her BS in Earth Science from UNC Charlotte and her MS in Geology from New Mexico Tech.
Emily's experience in groundwater modeling includes site conceptualization, development of three dimensional framework, calibration, verification, and post-processing. Most of this modeling work is completed using MODFLOW, Groundwater Vistas, Leapfrog Geo, and ArcGIS.
Other specialties include a broad range of experience in tribal water rights and water resources issues in the American Southwest. This includes developing past, present, and future water rights claims and hydrogeological investigations for municipal water supply wells including placement of well sites, preliminary well design, and pipeline placement. Emily also has experience in mine related environmental impact assessments and feasibility studies.
