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 "Grande Dixence Dam"): With the primary purpose of hydroelectric power generation, the dam fuels four power stations, totaling the installed capacity to 2,069 MW , generating approximately 2,000 GWh annually, enough to power 400,000 Swiss households.
Relevant evidence: No