Two decades of drought had diminished the lake, and motorized river traffic could no longer float overtop. We were ready to quit sloshing through the Escalante River when we finally reached the depleted reservoir and our rented houseboat. Then it took us less than an hour to reach our goal, the place where Gregory Natural Bridge lurked beneath us. Photo: Brett Frazer***If your interest in Glen Canyon Dam is piqued, there are plenty of books on the subject. Check out Russell Martin’s A Story that Stands Like a Dam: Glen Canyon and the Struggle for the Soul of the West.