Project 10073 Record: Presque Isle State Park Sighting, 31 July 1966

This document is a comprehensive report on a UFO sighting and subsequent investigation at Presque Isle State Park, Pennsylvania, occurring on 31 July 1966. Three young witnesses reported seeing a metallic, pentagon-shaped object land on the beach, accompanied by a 'black monster' in the nearby woods. The witnesses reported that the object caused their car to vibrate and that they were terrified. Local police and Air Force investigators, including Major William S. Hall and Captain Harry Meier, conducted an extensive investigation. They found triangular indentations in the sand, which were cast in plaster. However, chemical analysis of soil samples revealed the presence of acrylic resin, which was traced to the investigators' own casting process, and urine, which was deemed unremarkable. Investigators concluded that there was no evidence to link the lights, the indentations, and the alleged monster. They noted significant discrepancies in the witnesses' accounts and suspected that the incident might have been a hoax. The report includes various memos, statements, and technical analyses, ultimately concluding that the evidence was insufficient to support the claims of an extraterrestrial event and suggesting that the physical traces were likely man-made or animal-related.