Helping juvenile salmon migrate out to sea has long been difficult and controversial. Barging is a common way to get the fish around dams.
The salmon are hauled around eight dams in the Columbia and Snake rivers. Idaho Conservation groups say this practice harms fish — and needs to stop now.
Seven groups sent a letter to NOAA Fisheries and the U.S. Army Corps of Engineers, asking the agencies to this spring stop sending salmon along their migration route in barges.