Dams and hatcheries have a wide and detrimental impact on steelhead, salmon and stripers (among other fish), their spawning habitat and their ecosystems.
Cutting the Noose From the Salmon's Neck by David James Duncan
Fly Fishing Catalog 2003
Everything But Salmon by Ted Williams
Hatcheries: The High Price of Losing a Bet by Jim Lichatowich
Fly Fishing Catalog 2001