HEC-26 FHWA Fish Passage Culvert Design Guide
WEST Consultants assisted in the development of Hydraulic Engineering Circular (HEC) No. 26, “Aquatic Organism Passage Design Guidelines for Roadway Culverts” for the Federal Highway Administration (FHWA). This document presents procedures and best practices for culvert designs that facilitate aquatic organisms. The circular refines and optimizes geomorphic-based design approaches to provide for aquatic organism passage while providing a procedure based on quantitative best practices.

WEST researched existing fish passage design methodologies, developed conceptual design procedures and methodologies, and applied the selected design methodology to case study examples. Our researchers authored sections of HEC-26 circular, Published in October, 2010.