It is utmost importance that dams, especially those of mining tailings, presents satisfactory and acceptable levels of safety. Thereby, the present work proposes the creation of a methodology for determination and classification of hazard indexes and mapping of potential impacts associated with these structures on hypothetical situations of dam break. The research proposes the use of a multicriteria hierarchy method, known as Analytic Hierarchy Process (AHP) and characterized by decrease of subjectivity during evaluations. Stands out that this type of tool, beyond objective character, allows prevention measures evaluation that ensure the safety and minimize possible events. After quantification and application of statistical techniques, was performed classification of each one evaluated structures according to their danger degree, for example, low, medium and high. Finally, based on obtained results, mainly for Fundão dam, it is concluded that proposed methodology proved to be effective and with practical feasibility, being able to be useful for mining companies. It is also verified that it allows mitigating actions and reduction of events that may contribute to these dams break, purpose of management programs for such ventures.
