The 76 foot long, 64 gt Powell Lake tour boat Desert Shadow went aground at the Wahweap Marina, Page, Arizona on May 11.   The tour boat had just completed refueling and was proceeding away from the dock when it was struck by a strong gust of wind.   The tour boat struck part of the launch ramp before ending up on the beach.    The vessel remained ashore until the tour boat Canyon Odyssey and another barge were able to pull the vessel back into the water.   No one was injured and the Desert Shadow only suffered minor scratches.   There were no passengers on board at the time.    The dock’s sewage pump-out was damaged.