John Sigda, Senior Hydrogeologist

505-246-1600
jsigda@intera.com

PhD, Earth and Environmental Science, New Mexico Institute of Mining and Technology, 2004
MS, Hydrology, New Mexico Institute of Mining and Technology, 1997
BA, Engineering, Harvard, 1981

John Sigda is a Senior Hydrogeologist with 26 years of experience in quantitative hydrogeology.  Mr. Sigda specializes in flow and transport modeling, groundwater remediation, watershed management, geologic controls on hydrologic processes, field and lab measurement of hydraulic properties, and development/application of appropriate technology for water supply and sanitation.  He has applied this expertise to a wide variety of projects involving water supply development, water supply and wastewater treatment design, drought emergency planning, radioactive and hazardous waste landfill permitting, evaluation of existing mine operations and mine expansions, and investigation and remediation of contaminated industrial and federal sites. Some of his recent modeling efforts include conducting variably saturated flow modeling to estimate the long term impacts on water resources from Waste Control Specialists' hazardous and low level radioactive landfill facilities located on the New Mexico-Texas border; performing integrated variably saturated flow and reactive solute transport through and beneath mine waste rock as part of the environmental impact statement assessment of proposed mine expansions in Nevada; using the MODFLOW-SURFACT code to assess the long-term impacts to water resources from mine dewatering for underground workings at a large gold mine; and modeling flow through a karstified limestone aquifer underlying an industrial site in Minnesota to support monitored natural attenuation of a 2-mile long chlorinated solvent plume.