Tree-related outages are the major cause of system interruptions at Cemig Distribuição. Since 2004, the utility has been facing an increasing number of tree-related outages. In 2009, total tree-related outages numbered 2,250, and the average cost of tending to an event was $180 per outage. The main reason for the increase in outage numbers — tree related or not — is the decrease in maintenance budget, a situation similar to that of other utilities in Brazil and ...

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