New Orleans in the US benefited from on-site power last week, when Hurricane Isaac threatened the city’s capacity to cope with flood water.

The city’s drainage system continued to pump at full capacity while battling intermittent power outages, Sewerage & Water Board Executive Director Marcia St. Martin said.

Hurricane Isaac

This was thanks to the city’s 24 drainage pump stations being powered by on-site generators and electricity from the board’s own power plant.

The S&WB produces an uncommon kind of electricity known at 25-cycle or 25-hertz, which powers much of the drainage system west of the Industrial Canal in New Orleans, she said. Drainage pumps farther east operate on the more common 60-cycle, reports the Bayeux Buzz.

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