At first glance, this structure appears to be an enigma. It’s a bridge between two granite monoliths, an above-ground tunnel, and an aqueduct carrying water over a creek. This structure is actually part of an elaborate water system. The Feather River Canyon is a scenic wonder. Sheer granite slabs rise hundreds of feet above the water. Almost equally impressive are the measures engineers have taken to conquer this rugged terrain. Constructed in 1949, the Cresta Power Dam diverts water through a 21,000-foot-long tunnel bored through solid rock. At 12 feet…
