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.

TGAEC establishes HSU internship position, February 2,  2018

TGAEC and Humboldt State University have established an internship position to support GIS modeling of potential non-natal coho rearing restoration sites around Humboldt Bay.  We are very excited to work with Dr. Graham and the HSU Geospatial Science Department and provide students with paid working opportunities.  HSU is a great resource and these private/academic partnerships are a huge benefit to the community.



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.

Let us be your problem-solvers!