Loading
Daniel B Stephens
  • Markets & Services
    • Laboratory Services
      • Instrumentation/Automation
      • Research/Development
      • Sensor Calibration
      • Soil Properties Testing
    • Environmental Data
      Management
      • Custom Web Applications
      • Data Management
      • GIS/Mapping
      • GLA-Data
      • Site Visualization/Analysis
    • Oil/Gas/Energy
      • Carbon Management
      • Natural Resources
      • Permitting/Compliance
      • Water Supply/Development
    • Engineering
      • Mining
      • Remediation
      • Stormwater
      • Solid Waste
      • Water/Wastewater/Reuse Systems
      • Funding Assistance
    • Natural Resources
      • Biological Services
      • Clean Water Act Compliance
      • Cultural Resources Services
      • Environmental Impact Studies
      • Watershed Management
    • Contaminated Sites
      • Indoor Air Vapor Intrusion and Risk Assessment
      • Operation/Maintenance/Monitoring
      • Petroleum Storage Tank Sites
      • PFAS Investigations
      • Remediation
      • Superfund Sites
      • Site Investigation/Characterization
      • Vadose Zone Hydrology
    • Water Planning/Development
      • Brackish Water/Salinity
      • Engineering
      • Geochemistry
      • Modeling
      • Public Involvement
      • Recharge/Reuse/Recycling
      • Stormwater
      • Sustainable Groundwater Management
      • Vadose Zone Hydrology
      • Watershed Management
      • Water Planning
      • Water Quality
      • Water Rights
      • Water Workshops and Training
      • Wells/Wellfields
      • Funding Assistance
    • Litigation/
      Expert Services
      • Experts
      • Contaminated Sites
      • Indoor Air Vapor Intrusion/Risk Assessment
      • Mining
      • PFAS Investigations
      • Vadose Zone Hydrology
      • Water Rights/Disputes
    • Mining
      • Closure/Reclamation
      • Engineering
      • Environmental Site Characterization/Remediation
      • Hydrogeology/Geochemistry
      • Permitting/Regulatory Compliance
      • Soils/Geotechnical Laboratory Analysis
      • Water Management/Supply
      • Enhanced Metal Recovery
    • Solid Waste
      • Compliance Monitoring
      • Construction Quality Assurance
      • Interim and Final Closure
      • Laboratory Services
      • Modeling
      • Permitting and Design
      • Stormwater Management
  • About
    • Principal Professionals
    • Representative Projects
    • Publications and Water Plans
    • Awards & Rankings
    • Community
  • News
  • Careers
  • Contact
  • Click to open the search input field Click to open the search input field Search
  • Menu Menu
You are here: Home1 / News2 / Need to Know3 / Welcomes Dr. Tolley to Northern California Team

Welcomes Dr. Tolley to Northern California Team

Need to Know

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
Email
LinkedIn

 

December 2, 2019
Share this entry
  • Share on Facebook
  • Share on WhatsApp
  • Share on LinkedIn
  • Share by Mail
https://www.dbstephens.com/wp-content/uploads/2022/10/DBSA-website-color-logo-300x65.png 0 0 db_stephens_admin https://www.dbstephens.com/wp-content/uploads/2022/10/DBSA-website-color-logo-300x65.png db_stephens_admin2019-12-02 12:59:452019-12-18 16:55:54Welcomes Dr. Tolley to Northern California Team
Search Search

Recent Posts

  • 2026 Land and Water Summit
  • DBS&A Supports NMED Emerging Contaminants Program
  • Carbon Capture, Utilization, and Storage 2026

Daniel B. Stephens & Associates, Inc.


6501 Americas Parkway NE, Suite 200
Albuquerque, NM 87110

Phone  505-822-9400
Fax  505-822-8877

Locations

  • California

  • Colorado

  • New Mexico

  • Texas

  • Washington, DC

Information

  • Services
  • News
  • Community
  • Contact

Work With Us

DBS&A Careers
© 2026 Daniel B. Stephens & Associates, Inc. | Phoenix Web Design by Kinetik IT
  • Link to LinkedIn
  • Link to Youtube
  • Link to Facebook
  • Employee Intranet
  • Legal notice
Link to: Christopher Leibli Joins Midland, Texas Link to: Christopher Leibli Joins Midland, Texas Christopher Leibli Joins Midland, TexasLink to: Dr. Schnaar Presents on PFAS Forensics: How to Identify Sources of Contamination Link to: Dr. Schnaar Presents on PFAS Forensics: How to Identify Sources of Contamination Dr. Schnaar Presents on PFAS Forensics: How to Identify Sources of Contamin...
Scroll to top Scroll to top Scroll to top