dennisSupervising Hydrogeologist

With a background in geochemistry and hydrogeology, Dennis is experienced in public drinking water systems and a variety of groundwater issues. He is a recognized expert in geochemical modeling and routinely provides support for projects conducting various other hydrogeologic and hydrogeochemical studies of groundwater resources.

Dennis has expertise in assessing water supply sources, including delineating time-related capture zones for wells, estimating aquifer sensitivity, and determining chemical compatibility of source and receiving waters during aquifer storage and recovery.

Dennis donates his time and technical experience as a volunteer to the Oregon Health Authority’s Drinking Water Program office in Springfield, Oregon.


  • Registered Geologist, Oregon
  • Professional Geologist, Idaho


  • PhD, Geology and Geochemistry, Oregon State University
  • Graduate Studies, University of North Carolina at Chapel Hill
  • BS, Geology, Portland State University


  • National Research Council Fellowship, Planetary Sciences, NASA, Johnson Space Center, Houston, Texas, 1988-1990.
  • Benjamin J. Nelson (Senator, State of Nebraska) Government Service Award recipient for 2005: The Groundwater Foundation.
  • Commendation from Region 10, U.S. Environmental Protection Agency: “For Diligent Efforts to Promote Drinking Water through the Completion of Oregon’s Source Water Assessments,” 2006.
  • Dennis was a contributing Associate Editor of the 4-volume encyclopedia “Water: Science and Issues,” published by Macmillan Reference USA in 2003.

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