As the traditional logging industry deals with unsteady prices and the challenges of globalization, the value of a new crop is coming to light: trees hidden under reservoirs, long given up for lost. Sawn, but not forgotten. Photo: Triton Logging Inc. While no exact count of these "rediscovered" forests -- which are being logged primarily in North and South America, Russia, and Malaysia -- seems to exist, one estimate puts it at about 200 million trees, a global supply worth about $40 billion. These watery woods have been preserved by cold water and protected from rot and insect infestation. The …