Welcomes Dr. Tolley to Northern California Team

DBS&A is pleased to announce that Dr. Douglas (Gus) Tolley has rejoined our team in northern California. Gus worked with DBS&A in California and New Mexico prior to returning to graduate school to earn his MS in Hydrology from New Mexico Tech and PhD in Hydrology from University of California-Davis. His dissertation title was “Assessment of Groundwater-Surface-Water Interactions in an Irrigated Agricultural Basin with Groundwater Dependent Ecosystem Using an Integrated Hydrologic Model”.

Dr. Tolley specializes in:

  • Groundwater hydrology
  • Groundwater resources
  • Engineering hydrology
  • Contaminant transport in groundwater

His background with numerical modeling and surface water-groundwater interactions will be beneficial to many of the GLA companies’ water planning and development, mining, solid waste, and litigation clients throughout the West.

Dr. Tolley’s project experience includes providing construction and hydrogeologic support for water supply development projects, groundwater intrusion management, and litigation support related to contaminated soil and groundwater. He has experience with the development, sensitivity analysis, calibration, and uncertainty analysis of integrated hydrologic models, and was one of the lead developers of the Scott Valley Integrated Hydrologic Model (SVIHM), which is currently being used to formulate the Groundwater Sustainability Plan (GSP) for the basin. He will be active in DBS&A’s ongoing Sustainable Groundwater Management Act (SGMA) GSP preparation projects in California and water resource development and management projects in the western U.S.

Contact Gus:
143E Spring Hill Drive
Grass Valley, California 95945
(530) 272-2448 Ext. 125