Ehrgott has said the holes can be up to 10 inches deep and more than 10 feet long. The large potholes have formed between County ... dolphins and other aquatic life need to thrive. Mississippi River ...

Just north of the famous Gorge Amphitheatre are two enormous lake-filled canyons that appear to feed into the Columbia River. But the canyons of Potholes Coulee weren’t carved by rivers, and the lakes ...

According to the RAC, the term "pothole" can be traced back to the Roman Empire, when potters who could not afford clay stole from roads built on a layer of clay, causing deep holes in the surface.