Dam failures are frightening, and they can become disasters. Just how common – or uncommon – are the failures of dams in the U.S.? What are the contributing factors and are there ways we mitigate them?To learn the facts about dam failures, we talk with John Roche, who is Chief of the Dam Safety Permits Division of the Maryland Department of the Environment. John’s work on dams includes emergency preparedness and response, public safety strategy, policy development, hydrology and hydraulics, and natural resources management. John earned his BS in Civil Engineering and MS in Geotechnical Engineering from University of New Hampshire. He’s a registered Professional Engineer in multiple states and is currently Secretary and Board Member of the Association of State Dam Safety Officials.