Franco Oboni & Cesar Oboni


Table 4. The good, bad and ugly failure mode and annualized PoF


Table 5. Main causalities per dam


In the good dam the “design” causality leads with 51%, Investigation 24%, Construction 5% and Inspections, monitoring and maintenance are at 20%. This last value does not change for the bad and the ugly, because the other factors variations are more significant in the specific case. Indeed, in the Bad and the Ugly dams investigation grows to 28%, while design reduces to 42% (because there are many factors of ignorance that impact the other key performance indicators). Hence Investigations and construction increase respectively to 28% and 10%.


7. Preparing Scripts to Study Mitigative Alternatives


7.1. Example for an existing inactive dam undergoing a possible buttress construction In this section we examine which data would change if a buttress were built at a dam, leading to the possibility of preparing a script for buttress mitigation. Indeed, a number of dam’s data will be better due to the studies to undertake to design the buttress and the enhanced stability conditions. Operations, maintenance, monitoring etc. should also improve.


190 | Dam Engineering | Vol XXXIII Issue 3


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