Fish Passage Criteria Evaluation, August, 2018

Together with Normandeau we are excited to announce that CDFW has selected our team to conduct a rigorous evaluation of the Thompson Criteria for assessing fish passage flows.  The Thompson Criteria is used as the standard operating procedure to evaluate salmonid passage; however, it may not be the best or even appropriate in some streams.  We will use 2D and 1D modeling and observations for regional site evaluations.


Our Services

We offer a wide range of environmental consulting services to serve potential client needs.With over four decades combined experience, our staff specializes in instream flow studies, hydraulic habitat modeling, quantitative fish population studies, and the writing of NEPA/CEQA related environmental documents.Please refer to the “Services” tab for a complete detailed listing of our abilities.

Thomas Gast & Associates Environmental Consultants is a California-certified small business (SB# 1796367), dedicated to provide the most cost-effective, innovative, and science-based results for the most challenging natural resource dilemmas. We provide innovative solutions for complex environmental issues.

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