Report of Findings: Lake Superior Classified Barrel Disposal Site. DefenseEnvironmental Restoration Program for Formerly Used Defense Sites. Project No. E05MN025501

摘要

This report contains findings of underwater surveys and barrel recoveryoperations conducted in Lake Superior by the U.S. Army Corps of Engineers, St. Paul District in 1990. Twenty-four square miles of lake bottom were electronically surveyed, resulting in the verified location of approximately 105 barrels believed to be classified scrap produced between 1959-1962 by Minneapolis -Honeywell Inc. Two barrels were recovered from a depth of 170 feet, and opened by personnel wearing protective safety equipment. The contents were confirmed by Honeywell personnel to be safety and arming devices for a BLU-3 or BLU-4 anti-personnel grenade/mines. The material had been declassified prior to the initiation of a previous search in 1977. After their discovery, 25 barrels were monitored using an underwater gamma probe. Radiologic data collected in the proximity of the barrels did not indicate any health or safety risks in the area monitored.