this is for small salmon headed out to sea. it is NOT necessary to remove the dam. what is necessary and mandatory is to create a funneling effect perhaps even with an electrical current; to guide the small fish during this time of the year into a pipe which is laid on the bottom of the lake. which then releases its water through an appropriate change in the lift gates of the dam. small fish will naturally find the fastest flowing water and follow it; which will be in this pipe. attention must be paid to how they are released/ NOT onto concrete.