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Disclaimer: I don't know anything about that particular river, however I do know a little about barriers in streams.
Depending on the management goals of the river, dams can hurt or help achieve a plan. Sometimes dams are purposely installed to prevent an unwanted fish from moving upstream (i.e. stop browns or brookies from moving up to an area containing native cutties). But often the dam has been there longer than people have been concerned about maintaining healthy fish populations. . . we just have to live with having an impassable barrier in the river. For naturally reproducing trout, it's a problem because they can't move freely over the course of their lives to find the best habitat. For stocked trout in a put-and-take fishery, the fish aren't ment to survive and reproduce so it's not really a loss.
my 0.02
TP
Depending on the management goals of the river, dams can hurt or help achieve a plan. Sometimes dams are purposely installed to prevent an unwanted fish from moving upstream (i.e. stop browns or brookies from moving up to an area containing native cutties). But often the dam has been there longer than people have been concerned about maintaining healthy fish populations. . . we just have to live with having an impassable barrier in the river. For naturally reproducing trout, it's a problem because they can't move freely over the course of their lives to find the best habitat. For stocked trout in a put-and-take fishery, the fish aren't ment to survive and reproduce so it's not really a loss.
my 0.02
TP