River change could help endangered fishby Cara Hetland,
Minnesota Public Radio For the first time, the U.S. Army Corps
of Engineers is trying to mimic the natural flow of the Missouri
River. The corps has been holding back water for several days at
Gavins Point Dam in South Dakota. It's one of six dams in the
upper basin. For the next several days the corps will release
large amounts of water creating a higher flow just like a spring
rain. Researchers call that a pulse and say that's what tells
fish it's time to spawn. Gavins Point Dam, S.D. — Herb Bollig is
passionate about saving fish. He runs a fish hatchery near
Yankton, South Dakota. His job is to save the endangered pallid
sturgeon. "To me it's somewhat unethical to let a species die
out. Where do you draw a line in the sand and say, 'Ok, we're
not going to accept this any longer. We can save a lot of these
species,'" says Bollig. "The pallid sturgeon is basically an
indicator species of what's happening in the Missouri River.
These aren't the only fish