California Department of Transportation

Fish Passage Design for Road Crossings

This guide is intended to provide detailed instructions to assist designers in generating projects that will acheive resource agency goals for fish passage within a state highway project context.

Developed in conformance with both state (California Department of Fish and Game) and Federal (NOAA Fisheries Service, Southwest Region) criteria, "Fish Passage Design for Road Crossings" provides worksheets, flow charts, design examples and other design aids to assist the designer in achieving permit achievable projects.

In addition to the Caltrans’ Fish Passage for Road Crossings guidance document, CA Fish & Wildlife’s (CFW) Part XII: Fish Passage Design and Implementation document, CFW’s Culvert Criteria for Fish Passage, and NOAA Fisheries Service Guidelines for Salmonid Passage at Stream Crossings document, should all be used in the design and development of Caltrans’ fish passage projects.

For any questions regarding this guide please contact Bruce Swanger, Office of Hydraulics and Stormwater Design at (916) 653-1302.


This page last updated October 17, 2014