Grady O'Brien
Principal Hydrogeologist
Mr. O’Brien has over 30 years of hydrogeology experience for mining, agricultural, industrial, commercial, and governmental clients. He specializes in mining hydrogeology that includes characterization, predictive modeling, permitting, and operational dewatering. He has experience in the design, planning, and implementation of characterization programs that support the groundwater flow and chemical transport modeling. He employs a variety of pumping and injection testing methods to estimate the hydraulic properties of soft and hard-rock aquifers and fractured systems. He develops an understanding of the physical processes and long-term trends by monitoring groundwater, surface water, and water quality. He has directed and installed vibrating-wire piezometers, traditional piezometers, monitoring wells, and temporary monitoring wells according to the project-specific needs.
Mr. O’Brien directs the conceptualization, construction, and calibration of groundwater flow models that represent the natural hydrologic system and the built environment. He uses predictive modeling to support environmental impact evaluations, mine dewatering programs, open-pit designs, and pit slope stability analysis. These analyses are used to support mine permits, feasibility studies, environmental impact statements, mine operations, and CERCLA site closure actions.
Education
Master of Engineering (Geological Engineering), 1997
Colorado School of Mines, Golden, Colorado, USA
Bachelor of Science (Geology), 1986
University of Wyoming, Laramie, Wyoming, USA