This seminar provides professionals with a greater understanding of hydraulics and fish passage as they pertain to channel design and stream crossings. Fish behavior/response to different flow condtions is reviewed. It provides tools to understand and assess fish passage. Several simple hydraulic approaches for assessing fish passage are presented. Methods for instream treatments (. vortex weirs, armoured beds) are also discussed in the context of channel hydraulics and ecological benefit. This course assists agency and municipal personnel to ensure that the proper questions are asked when assessing channel designs and other activities that impact aquatic habitat.