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Thomas R. Payne & Associates (TRPA)

Thomas PayneThomas R. Payne & Associates (TRPA) is a fisheries consulting firm with extensive experience in the analysis of instream flow needs and the impacts of water resource project development on fishery resources. Over the past eighteen years, TRPA has worked on nearly 200 separate projects, conducting instream flow studies, modeling instream water temperatures, evaluating fish habitat and populations, developing fish habitat use criteria curves, and completing environmental impact reviews and assessments.

Service Offerings: Designing and constructing fish habitat enhancement structures, Conducting watershed cumulative impact analyses, Negotiating fishery resource protection provisions, Preparing licensing documents.


Thomas R. Payne & Associates
890 L Street
Arcata, CA 95521
P.O. Box 4678
Arcata, CA 95518