Project 10073 Record — Roseville, California, 14 October 1954

This document details a sighting report from 14 October 1954 in Roseville, California, involving a civilian witness. The report describes a white, sticky substance that was observed falling from the air and wrapping around weeds over a period of five hours. The substance was described as being too strong for a typical spider web, yet light enough to drift with the wind, leading to the colloquial description of 'Angel Hair.' The incident was investigated under Project 10073. Physical evidence was collected and sent to headquarters. An analysis conducted by Colorado College concluded that the material was composed of sheets of silk massed together from spider threads, identified as 'Spider Gossamer.' The report notes that such occurrences are sometimes observed in the Yosemite Valley and are considered a yearly phenomenon. The documentation includes an Air Intelligence Information Report (AF Form 112) and an index card summarizing the findings, which officially categorize the event as spider webs rather than an unidentified aerial phenomenon.