By Erik Robinson
Oregon City, Oregon (AP)

At the base of the basalt-black face of Willamette Falls, Bobby Begay plunged face-down beneath the surface.

Hooking his legs to a rock outcropping, Begay submerged himself for a solid 10 seconds as he felt around underwater nooks and crannies earlier this week. Finally, he popped out of the water with a gasp. In his right hand, he clutched a wildly squirming length of gray cartilage and muscle.