AQUA TERRA Consultants
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John C. Imhoff

Vice President & Manager of Rocky Mountain Office - Ouray, CO


  • Surface and Groundwater Resources Analysis and Planning
  • Chemical Fate, Transport and Exposure Assessment
  • Watershed Modeling
  • Computer Software Design and Application


Mr. Imhoff has more than thirty-five years of professional experience in water resources research and application projects. His specialized experience has focused on four concerns: surface and groundwater resources analysis and planning; chemical fate, transport and exposure assessment; watershed modeling; computer software design and application. He has been heavily involved in project work for the U.S. EPA and FEMA, and his project clients have included the U.S. Geological Survey, DoD, World Bank, U.S. Army Corps of Engineers, U.S. Air Force, the National Science Foundation, several planning commissions and counties.

Mr. Imhoff has had extensive involvement in all aspects of project development including proposal writing, technical guidance, management and administration, client relations, project review and report writing. In addition to project work, his professional activities have included technical training of personnel and clients in formal workshops in the United States and on site in Yugoslavia; serving as a lecturer for a graduate course in water quality modeling at Stanford University; and authoring or co-authoring numerous publications including book chapters on hydrology and water quality for Hydrology for Engineers, modeling rural nonpoint source pollution for Agricultural Management and Water Quality, modeling watershed water quality for Environmental Hydrology, EPA’s Hydrologic Simulation Program -FORTRAN (HSPF) for Computer Models of Watershed Hydrology, the history and evolution of watershed modeling derived from the Stanford Watershed Model for Watershed Models and continuous simulation for Handbook of Applied Hydrology. Mr. Imhoff currently serves as AQUA TERRA's National Marketing Coordinator and Quality Assurance Officer.

Professional Data

  • Stanford University - B.S., Biological Sciences, 1974
  • Stanford University - Honors Cooperative Program in Civil Engineering,1975-1978
  • National Merit Scholar, United States Presidential Scholar
  • Rocky Mountain Biological Laboratory, Member
  • Colorado Foundation for Water Education, Member
  • Tri-County Water Conservancy District Board of Directors, 2013-2015