Water for Generations: A Guide for Building Permanent Diversion Structures will give you some insight in how to replace leaky gravel "push-up" diversion berms with a small permanent diversion structure having fish passage capability. This seven minute video showcases some small diversions and also shows simple construction methods - through animation and actual construction sequences. You'll learn how easily small, permanent diversions can be built, with fish passage incorporated in to the basic design.
