2,500 'high-risk' U.S. dams are sinking into the ground

Technology Engineering 2,500 'high-risk' U.S. dams are sinking into the ground Radar shows that the damage may be out of sight for inspectors. Breakthroughs, discoveries, and DIY tips sent every weekday. Dams across the United States are in dire need of repairs, and the critical infrastructure may be even worse off than engineers anticipated. According to geoscientists, over 2,500 of the more than 16,700 structures in the country are classified as high hazard potentials and in "poor condition." This classification means that the dams that would cause significant death and destruction if compromised.