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Dry Falls is a 3.5-mile-long (5.6 km) scalloped precipice with four major alcoves, in central Washington scablands. This cataract complex is on the opposite side of the Upper Grand Coulee from the Columbia River , and at the head of the Lower Grand Coulee, northern end of Lenore Canyon. [ 1 ]
Sun Lakes-Dry Falls State Park (formerly, Sun Lakes State Park) is a public recreation area located at the foot of Dry Falls, three miles (4.8 km) west of Coulee City in Grant County, Washington. The state park covers 3,774 acres (1,527 ha) along Route 17 at the head of the Lower Grand Coulee .
Grand Coulee is the longest and deepest of eastern Washington canyons. Its unique characteristics include a lower floor at the head of the channel than at its outlet and the widest and highest dry falls cliff in the middle. [6] It was created through the process of cataract recession, which included a cataract twice as high as its existing Dry ...
Dry Falls in Eastern Washington has been named to the International Union of Geological Sciences “The First 100 Geological Heritage Sties” for its impact in understanding the Earth.
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It started near Soap Lake in Washington State, where less resistant basalt layers gave way before the great erosive power of this tremendous torrent and waterfalls developed. As in the upper Grand Coulee, the raging river yanked chunks of rock from the face of the falls and the falls eventually retreated to their present location.
The Missoula Floods discharged into Lake Spokane, through the Grand Coulee, greatly enlarging it, passed over Dry Falls and then ponded in and inundated the Quincy Basin, covering over 1500 km 2 (585 mi 2) and creating the Ephrata Fan (a deposit of boulders, cobbles, and pebbles where the flood waters discharged into the basin).
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