General Report on the Work at Kölmjärv 20/7 - 10/8 1946

This document is a general report detailing the investigative work conducted at Kölmjärv between July 20 and August 10, 1946. The investigation was prompted by eyewitness accounts of an impact, which left visible traces in the form of uprooted reeds and water lily roots, the latter being approximately the thickness of a human wrist and arranged in a semi-circle. Based on witness testimony, the direction of the impact was estimated, and the angle of impact was calculated to be approximately 45 degrees, possibly steeper. Given the provided information, it was considered highly probable that an impact had occurred. The investigative efforts were divided into two phases. From July 20 to July 29, soil probes were conducted using a linear system, with approximately 35,000 samples taken. This method yielded negative results, suggesting no large objects were present in the deposits above the solid bottom. Further tests using electrical mine-detection equipment also failed to produce positive results, and a check for oil slicks on the water was negative. From July 30 to August 10, search efforts continued using various electrical equipment. A device provided under the direction of engineer Levaux (KAST) proved insufficiently sensitive for the depths involved. However, a modified ore-detection device from Boliden yielded better results. Using this equipment, several suspicious points were marked, but none could be confirmed with certainty to represent metallic objects. The equipment was operated by specialists, including Dr. Malmqvist and a foreman from the Boliden mining company.