I got up at 5:15 a.m. on Saturday morning with the idea of driving 100 miles to watch the sun rise over the Sacramento-San Joaquin River Delta. I wanted to show my 84-year-old mom the beauty of one of California’s best-kept secrets. Maybe see some of the Delta’s magnificent sandhill cranes capable of flying up to 400 miles in a single day. But my real goal was to get a clearer perspective on the merit of building a single, 35-mile tunnel to provide a more reliable supply of water for generations of thirsty Californians.