Question: What company owns a hydroelectric, concrete gravity dam; located on the Columbia River, between the Yakima Firing Range and a mostly decommissioned nuclear production complex operated by the United States federal government on the Columbia River in the U.S. state of Washington?
Sentence (from "Hanford Site"): Plutonium manufactured at the site was used in the first nuclear bomb, tested at the Trinity site, and in Fat Man, the bomb detonated over Nagasaki, Japan.
Relevant evidence: No