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Train WPX with engines 3004, 3067. 3053, and 3051 is crossing the Rock Creek Bridge just east of Merlin on July 8, 1979. From a different vantage point, train TOF crosses the same bridge on November 4, 1976. Then from a much closer point, engines 3537, UP3478, and 3558 tiptoe across the same structure with train 170 on August 14, 1981. Disk 26