The Cascades Rapids (sometimes called Cascade Falls or Cascades of the Columbia) 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 (140 m) wide, the river dropped about 40 feet (12 m) in 2 miles (3.2 km). In 1896 the Cascade Locks and Canal were constructed to bypass the Cascade Rapids. In the late 1930s, the construction of the Bonneville Dam led to the submerging of the rapids as well as most of the 1896 structures.