In the United States, there are over 87,000 dams1. Dams Sector assets irrigate at least 10 percent of U.S. cropland, help protect more than 43 percent of the U.S. population from flooding, and generate about 60 percent of electricity in the Pacific Northwest. The National Inventory of Dams lists more than 87,000 dams throughout the United States, of which the private sector owns about 65 percent and State or local entities own about 31 percent1.