The DOE Office of Legacy Management took responsibility for the Pre-Schooner II site in 2019. The U.S. Atomic Energy Commission conducted site activities under the Plowshare Program during the 1960s. Project Pre-Schooner II was designed to test cratering characteristics in hard rock. It involved a single explosion of a 85.5-ton nitromethane charge detonated 80 feet below ground surface on Sept. 30, 1965. The test resulted in a crater that measures approximately 200 feet across and 61 feet deep. In 2022, DOE installed an interpretive sign to provide information to visitors on the non-nuclear underground explosives test completed at the site. LM performs minor maintenance and keeps records and histories for the site. For more information about the Pre-Schooner II site and other Plowshare Program sites, view the fact sheet.
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