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.

Let us be your problem-solvers!


Tenmile Creek Water Conservation Project, July, 2018

Together with ERRP we are excited to announce that the SCC has selected our project team's  “Tenmile Creek Water Conservation and Restoration Pilot Planning Project” to receive full funding