page_title: Cascades Rapids
section_title: Steamboat navigation
hierarchical_section_title: Cascades Rapids / Steamboat navigation
caption_attribution_description: English: photograph of sternwheeler Hassalo running the en:Cascades Rapids, May 26, 1881
context_page_description: The Cascades Rapids were an area of rapids along North America's Columbia River, between the U.S. states of Washington and Oregon. Through a stretch approximately 150 yards wide, the river dropped about 40 feet in 2 miles.
  In 1896 the Cascade Locks and Canal were constructed to bypass the rapids. In the late 1930s, the construction of the Bonneville Dam led to the submerging of the rapids and most of the 1896 structures.
context_section_description: The Cascades were a significant barrier to river navigation. Steamboats could not go upriver through the rapids, and could be brought downriver only at great risk, although this was done a number of times by highly skilled captains.  A canal and lock around the rapids was completed in 1896 at what is now Cascade Locks, Oregon. By 1938 the rapids were gone, submerged under the Bonneville Reservoir as it formed behind Bonneville Dam. Bonneville Lock at the dam, completed in 1937, replaced the old Cascade Locks around the rapids.
caption: Sternwheeler Hassalo running the Cascades of the Columbia, May 26, 1888
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