RV7 Flight over Grand Coulee Dam

If you look beyond the dam to the upper part of the picture, you see Banks Lake and Steamboat Rock. All of this area was part of the great Ice Age Floods, or the Missoula Flood. About 10,000 years ago an enormous glacier or ice dam up around the Canadian border gave way, causing water to storm through many, many miles in central Washington. It swept away all top soil and left enormous rifts in the land. Some of the rifts are still filled with water. Banks Lake is one of them.  
Banks Lake is very long! As we flew along it, wind conditions caused our little airplane to bounce around like popcorn in a hot oil skillet. 
We’ve finally reached the end of the lake. Quite a dam at the end of it. We continued to fly south. A few miles after you reach the end of Banks Lake, you come to Dry Falls. Dry Falls pretty much fits its name. It’s where the glacial flood carved out the rock and made an enormous falls, somewhere around the size of Niagara Falls. Except that there is no water running over it and hasn’t been for about 10,000 years. 
In this picture, we’re on the edge of Dry Falls. You can’t see it well, but it’s right above the wingtip. Looking back you see Banks Lake. You can also visualize the flood waters that covered the land and then dropped over the falls.

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