Karst Investigations

• Lithological and structural mapping
• Karst mapping
• Dye tracer testing (qualitative or quantitative)
• Speleology (cave mapping)
• Water chemistry characterization
• Springshed delineation
• Installation of continuous monitoring stations
• Open channel flow gauging
• Groundwater contamination and remediation studies
• Drilling & installation of groundwater monitoring network
• Groundwater resource development
• Mine dewatering
• Geohazard investigations
• Geophysics to map shallow karst features
• GIS based aquifer risk assessment
• Conceptual modeling of karstic groundwater system
• Numerical modeling
• Expert witness

Features Projects

	Antamina Mine, Peru Various Hydrogeological Studies in Karstic Mountainous Terrain Hydrogeological characterization to predict environmental impact from proposed waste rock dumps within mountainous terrains of the Tucush and Vallecito Valleys. The investigations included: hydrogeological mapping, drilling and installation of multi-level wells, pumping tests in fractured rock, 5 separate tracer tests, 3D numerical modeling, impact analysis.
	Cerro Corona Mine, Peru Karst Hydrogeological Study of Tailings and Mine Waste Areas Hydrogeological characterization of mountainous karstic terrain surrounding proposed tailings impoundment. The investigation included: karst mapping, hydrogeological mapping, drilling and installation of over 50 multi-piezometers, hydraulic testing, 6 dye tracer tests, speleology of 12 caves, hydrochemical analysis, 3D numerical modeling and impact analysis.
	Las Bambas Project (now MMG), Peru Karstic Aquifer Vulnerability Mapping Hydrogeological characterization of karstic terrain surrounding proposed open pit mines tailings, and waste areas. The investigation included: hydrogeological mapping, GIS aquifer vulnerability mapping, geophysical surveys, drilling and installation of multi-level piezometers in the tailings area, hydrochemical analysis, preliminary impact analysis, and recommendations for mine waste facilities.
	Michiquillay Project, Peru Karst Hydrogeological Study of Tailings and Mine Waste Areas Hydrogeological characterization of mountainous karstic terrain surrounding proposed tailings impoundment. The investigation included: karst mapping, hydrogeological mapping, drilling and installation of over 50 multi-piezometers, hydraulic testing, 6 dye tracer tests, speleology of 12 caves, hydrochemical analysis, 3D numerical modeling and impact analysis.
	Port Colborne Refinery, Ontario, Canada Hydrogeological Study and Groundwater Remediation in Micro Karst Aquifer Hydrogeological characterization of a 100 year old nickel refinery. This 5 year investigation included: ground water/surface water quality investigation, geophysical surveys, multi-well installations, hydrochemistry, contaminant plume delineation, ground water modeling, design and implementation of a purge well system for containment purposes.
	Tintaya Mine, Peru Hydrogeological Study of Tailings Impoundment in Karstic Setting Characterization of karstic terrain surrounding existing tailings facility. The investigations included: karst and hydrogeological mapping, drilling and installation of wells, hydraulic testing, dye tracer tests., hydrochemical analysis, and closure options.
	Galeno Project, Peru Hydrogeological Components of a Mining Project in Karstic Mountainous Terrain Characterization of karstic terrain surrounding mine, tailings and waste storage areas. hydrogeological and karst mapping, geophysical surveys, drilling and installation of piezometers, test wells, pumping tests, 3D numerical modeling and impact predications.
	San Vicente Mine, Peru Mine Dewatering Investigation in Karstic Terrain Underground mine surrounded by karstic terrain. The investigations included: surface and underground mapping, geophysical surveys, drilling and installation of piezometers, dye tracer testing, 3D numerical modeling and mine inflow predications.

David Evans, M.App.Sc. Principal Hydrogeologist

• 27 years of groundwater and business management experience with most of his career working in fractured and karstic limestone areas.
• Hydrogeological leader on some of the largest karst hydrogeological investigations in Peru for companies such as Antamina, Anglo American, Barrick, Gold Fields, Mitsui, Volcan, and Xstrata.
• Karst Commission Member for the International Association of Hydrogeologists (IAH) - position held since 2009. The goal of the karst commission is to promote a defensible scientific basis and professional practice for the sustainable management of karst water resources.
• Currently Co-founder and Managing Director for FloSolutions.
• Global Mining Hydrogeology Sector Leader for MWH (2011-2013) and led the largest and most diverse center for hydrogeology within MWH globally and one of the largest and most diverse hydrogeological groups worldwide.
• Founder and Managing Director of Groundwater International (GWI), the largest hydrogeological consulting group in Peru between 2004 and 2008.
• Chairman, Mine Water Solutions in Extreme Environments Conference, Lima, Peru, April 15-20, 2013
• Founder and General Manager of HCI-Itasca (Lima, Perú), 2002 – 2004.