615 460 9797

David E. Jackson, Principal Geologist


David E. Jackson is a consulting geologist with over 30 years of experience. Mr. Jackson’s technical interests include characterizing the geological context of stream hydrology, perched water, and groundwater occurrences with regard to site uses, regulatory permitting and agency enforcement. He is registered by state licensing boards as a professional geologist via national and state

Mr. Jackson is certified as a Professional Hydrologist (groundwater emphasis) by the American Institute of Hydrology and is a Qualified Hydrologic Professional certified by the State of Tennessee. He has conducted numerous surface hydrology and groundwater investigations for quarries, mines, impoundments, commercial and manufacturing facilities, landfills, defense sites, and linear projects (pipelines, roads, railroads, etc.). Mr. Jackson has served as an expert witness in federal and state judicial proceedings.

Mr. Jackson’s findings have supported jurisdictional determination of state and federal waters, including determinations under the U.S. Army Corps of Engineers post-Rapanos guidelines. His work has supported Corps NEPA Findings of No Significant Impact regarding project effects to groundwater and surface streams.

Mr. Jackson is experienced in managing remedial groundwater site investigation and closure under CERCLA, RCRA, and state brownfield protocols, including sites in fractured rock and karst terranes. For mining, development, construction and industrial clients, Mr. Jackson has managed surface water quality permit and enforcement matters, including providing expert testimony in state and federal venues. His experience includes conducting socio-economic analysis of impacts to High Quality waters under federal and state antidegradation regulations for proposed transportation, water supply, and power facilities. Mr. Jackson is responsible for negotiating mitigation plans, for water resource projects and is experienced in mitigation banking.



  • 1986-Present – Consulting Geologist
  • 1986-1987 – Executive Director, The Nature Conservancy, Tennessee Chapter
  • 1982-1986 – Senior Geologist, Exxon Company, USA
  • 1978-1979 – Geologist, Union Carbide Corporation


  • “Stream Determination in Tennessee: A Current Overview”, invited presentation to the Nashville Bar Association, Environmental Law Committee, August, 2011.
  • “Stream Determination & Groundwater Hydrology,” invited presentation to the Honorable James H. Fyke, Commissioner, Tennessee Department of Environment & Conservation and senior staff, June, 2008.
  • Jurisdictional Stream Determination in Tennessee, presented to 37th Annual Tennessee Department of Environment & Conservation Solid & Hazardous Waste Convention and Exhibition, Gatlinburg, Tennessee, May, 2008.
  • Hydrology of an Alluvial Fan in Eastern Tennessee Geologic Constraints on Streamflow, Aquatic Habitat, and Flood Hazards, American Water Resources Association Tennessee Section Symposium, 2008.
  • “A Lesson in Definitions: Hydrology and Stream Designations Under TDEC & U.S. Army Corps of Engineers Permit Regulation” presented at Water Resources in Tennessee Continuing Legal Education Seminar, Nashville, Tennessee, May 2005.
  • “Reconsidering the Wet-weather Conveyance: Defining Waters of the State in Tennessee”, presented to the Tennessee Roadbuilders Association, Nashville, Tennessee, April, 2004.
  • “Avoiding Impacts to Federally Endangered Orconectes shoupi: Water Quality Permitting Options at Proposed Sunset School,” presented to Williamson Board of Education, Franklin, Tennessee, March, 2003.
  • “Sediment & Erosion Compliance Under TDEC’s Water Quality Criteria,” presented to Tennessee Homebuilders Association, Franklin, Tennessee, March, 2003.