Transcription of I3 — Risk Matrix and Impacts Table - BHP
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I3 — Risk Matrix and Impacts Table - BHP
I3 Risk Matrix and Impacts TableWater management Failure Assessment RegisterConsequenceLevel 1 Level 2 Level 3 Level 4 Level 5 Level 1 Level 2 Level 3 Level 4 Level 5 Happens HighHighExtremeExtremeExtremeCould easily happenModerateHighHighExtremeExtremeCoul d happen and has occurred here or LowModerateHighExtremeExtremeHasn't happened yet but couldLowLowModerateHighExtremeConceivabl e, but only in extreme circumstanceLowLowModerateHighHighPrepar ed for BMA May 2009 ESTABLISH THE CONSEQUENCE OR SEVERITY & ASSIGN A RATING OF LEVEL 1 TO 5 ASSESS THE RISKSPROBABILITY FACTORCONSEQUENCE SEVERITYUSING THE Matrix BELOW DETERMINE THE RISK CATEGORY1 event per 10 to 100 years ( within a single mine life)Less than 1 event per 100 years ( within life of BMA)Frequency ExamplesESTABLISH THE PROBABILITY FACTOR OF THE EVENTD escriptionMore than 1 event per year1 event per 1 to 10 yearsCould easily happenCould happen and has occurred here or elsewhereHasn't happened yet but couldConceivable, but only in extreme circumstancesEnvironmental ImpactLimited damage to minimal area of low signific
Operational water balance model - kept up to date. Monitoring equipment with telemetry system on creeks, dams. Flexible water management system. Monitoring and maintenance of dams and water management infrastructure (e.g. pumps and pipelines). Separation of clean and dirty water systems. Treatment of poor quality mine water. Level 3 Hasn't happened
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