WASHINGTON - The federal board that authorizes official names of geographic features unanimously rejected a petition Wednesday from a group of conservationists seeking to have Lake Powell known as Glen Canyon Reservoir. The 10-0 vote against the request from the Colorado-based Coalition to Rename Lake Powell came after more than a year of gathering public comment and less than three minutes of discussion by the U.S. Board on Geographic Names. The board met in Jacksonville, Fla., during the Council of Geographic Names Authorities annual conference. U.S. Geological Survey staff attending the meeting said board members dismissed the coalition's argument that Lake Powell did not accurately define the man-made body of water behind Glen Canyon Dam and caused confusion with a small mountaintop lake inside Rocky Mountain National Park in Colorado also named Lake Powell was "nonexistent." Board staff said the amount of comments received on the renaming request was believed to be the most for any naming case in the more than 100-year history of the board, with thousands of people across the country voicing opposition via letters, e-mailed messages, petitions and official comment forms. The popular recreation waterway on the Utah-Arizona border was named Lake Powell by the board in 1959 to honor Maj. John Wesley Powell, who captained the first recorded navigation of the Green and Colorado rivers in 1869. - Christopher Smith