Study suggests dams can benefit California salmon runs by releasing cold water as fish spawn
May 1, 2008
California's vast network of reservoirs — which destroyed more than 5,000 miles (8,000 kilometers) of salmon habitat when their dams were erected decades ago — could turn out to be a savior for a species on the brink of collapse, according to a new study....
http://www.iht.com/articles/ap/2008/05/01/america/NA-GEN-US-Disappearing-Salmon.php