Fish Passage Design for Roadway Crossings Guidance
The Fish Passage Design for Road Crossings Guidance is an engineering document intended to provide detailed instructions to assist Caltrans designers in generating projects that will achieve resource agency goals for fish passage within a state highway project context. It is neither intended as, nor does it establish, a legal standard for these functions. The content is subject to amendment as conditions and experience may warrant. Special situations may call for a variation from the described procedures.
Developed in conformance with the California Department of Fish and Game (CDFG) and the National Oceanic and Atmospheric Administration (NOAA) Fisheries Service, Southwest Region (PDF) 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.
Other documents that should be used in the design and development of Caltrans fish passage projects include:
- California Fish & Wildlife (CFW) Part XII: Fish Passage Design and Implementation
- CFW Culvert Criteria for Fish Passage, and
- NOAA Fisheries Service Guidelines for Salmonid Passage at Stream Crossings