Miller Construction Co. owner Gosta Miller, a commercial pilot & aviation engineer, and an employee, and a trucking company owner and a gas station attendant saw an object like two inverted plates attached face to face, matte blue/grey or greenish/grey nonreflective bottom, bright aluminum top reflecting sunlight, 20' diameter, others estimated 15' to 25', 4' to 5' thickness.
Object seen over the north end of town at 3,000' to 5,000' altitude about 4 miles away moving in several directions rocking or rotating in semicircles 6 times, move east descending rapidly to about 700' to 1,000' altitude, rock again a few times with upper side now visible reflecting sunlight, fly southwest to 2 miles west of Dillon, rock again a few times, then rapidly flew over airport 12 miles northeast of Dillon at 1,000' departing rapidly to the east disappearing over mountains.
No sound or trail. Speed greater than 1,000 mph, so great object seemed blurred.
Comments by Capt. John P. Brynildsen, District Commander:
Particular attention is drawn to the fact that the direction of travel of the unconventional aircraft conforms with the radio beams in the Dillon range.