An environmental disaster far worse than the Exxon Valdez spill could happen at any moment, according to six senior employees of Alyeska, which operates the 800-mile Alaskan oil pipeline. The six whistleblowers wrote to three U.S. reps and Sir John Browne, chief executive of BP Amoco, which owns 50 percent of Alyeska, providing evidence of compliance failures, falsified safety and inspection records, and frequent violations of government regulations. The whistleblowers say they represent a much larger group of concerned employees afraid to speak out because of intimidation and harassment within the company.