The April 20, 2010, BP Deepwater Horizon blowout riveted citizen and elected officials' attention on coastal oil spills in ways not seen since the ill-fated 1989 Exxon Valdez crisis. A commonly voiced lament included why was the tragedy not prevented? Why the seemingly poor safety practices and who is to blame? Could a spill of such catastrophic proportion happen elsewhere in the future? Applying a spill prevention causation framework developed through the examination of other major near-shore incidents over a 23-year period, the author finds Deepwater Horizon exhibited a pattern of shortcomings evident in these other spills. These shortcomings are rooted in policy imperfections, a weak regulatory regime, organizational deviance in lieu of integrity, and interorganizational structure deficiencies.