Sentinel Gap

[1] The gap is "a water gap where erosion by the Columbia River was able to keep pace with folding, faulting and uplifting across the Saddle Mountain anticline".

[2] During Ice Age floods in which waters from the Channeled Scablands found passage to the Pacific Ocean here and at Wallula Gap,[3] this opening was "repeatedly reamed out, which probably widened and steepened the walls of the gap".

[6] The gap is located between the Wanapum and Priest Rapids dams.

Priest Rapids, for which the dam was named, are now submerged beneath the dam's reservoir about 4 miles (6.4 km) downstream from Sentinel Gap.

This Kittitas County, Washington state location article is a stub.