Indigenous people dipnet fishing for salmon at the Cul-De-Sac of Celilo Falls on the Columbia River in the mid 1950s, just prior to completion of the dam known as The Dallas. The resulting reservoir submerged the falls and the dam blocked fish passage. Evidence shows that native people converged upon Celilo going back 15,000 years. in 1805, Lewis & Clark in their journals noted the huge gathering of people there to harvest fish, observing it was the largest they had seen on their journey. Photo courtesy US Army Corps of Engineers.