Human error and corroded pipes were a catastrophic combination on 23 November when a natural gas explosion in Springfield, Massachusetts, injured 21 people and damaged more than 40 buildings.
Gas company officials attributed the incident to an employee puncturing a high-pressure pipeline with a metal probe while looking for a leak. However, the steel pipeline was highly corroded, making it susceptible to damage, according to Mark McDonald, president of the New England Gas Workers Association. "You would have to be Superman to go through steel pipe in good condition," he says.
Ageing natural gas pipelines in the US are increasingly coming under scrutiny. A recent study found 3356 leaks from pipelines under Boston alone. Twenty-five thousand leaks have been reported throughout Massachusetts, some of which have been leaking continuously for more than 20 years, McDonald says. "Enough is enough," he says. "We have to fix the leaks and maintain the gas lines."
The leaks raise safety concerns, and have implications for global warming. Methane is thought to be more than 20 times more effective at trapping heat in the atmosphere than carbon dioxide over a 100 year period.
Incidents involving natural gas pipelines in the US cause an average of $133 million in property damage each year according to data collected by the US Pipeline and Hazardous Materials Safety Administration. Even accounting for inflation, annual damages are several times higher today than they were 20 years ago.
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