Table 3.

Synthesis of the human failures related to geology

FailureOriginCategoryType
Choice of Professor Corroy, a geologist not specialized in dams (chosen for his proximity)OrganizationalDecisionInduced
Skill management
Decision by André Coyne to move the dam site and to build an arch dam instead of a gravity dam (with only mail consultation of the geologist)IndividualDecisionInduced
Overconfidence
Communication
Agreement of the new dam's site by Georges Corroy (without further field investigations)IndividualCommunicationInduced
Risk appreciation
Absence of strengthening work after the rock excavation and during the constructionOrganizationalRisk appreciationInduced