Navigation
The seasonal changes in the Columbia's flow, high in summer and low in winter, affected Celilo Falls dramatically. Lewis and Clark reached Celilo Falls in the late autumn when the water was relatively low, turning the falls into a major barrier. In contrast, when David Thompson passed Celilo Falls in July 1811, the high water obscured the falls and made his passage through the Columbia Gorge relatively easy. Modeste Demers wrote about the seasonal change in 1839: "One may be astonished to learn that these chutes, so terrible at low water, are smooth and still at very high water, which does not happen every year. Then it is that, instead of fearing them, the voyageurs hasten to approach them, to light their pipes and rest." More difficult was the Long Narrows, or Big Dalles, ten miles below Celilo Falls. This section of the river was impassable during high water. During the autumn low water they were passable but with unloaded boats only, and even then the passage was very dangerous. "They are never passed without dread", wrote François Blanchet in 1839. Narcissa Whitman asserted in 1836 that over one hundred "white lives" had been lost at the Dalles.
In the 1840s and 1850s, American pioneers began arriving in the area, traveling down the Columbia on wooden barges loaded with wagons. Many lost their lives in the violent currents near Celilo. In the 1870s, the Army Corps of Engineers embarked on a plan to improve navigation on the river. In 1915, they completed the 14-mile (23 km) Celilo Canal, a portage allowing steamboats to circumvent the turbulent falls. Though the canal's opening was greeted with great enthusiasm and anticipation, the canal was scarcely used and was completely idle by 1919.
Read more about this topic: Celilo Falls/GA1, History