Just off the highway near Washington’s Tri-Cities, 20 miles southeast of Pasco, Steve Angster steps into a giant trench. In it, the U.S. Geological Survey geologist is hoping to find evidence of a fault line.
He looks out through the morning fog. It’s hard to see the surrounding landscape, but Angster knows it well.
“On a clear day you could see Rattlesnake Mountain, and then, we have what we call the rattles, which are those little buttes along the way,” Angster says.