New natural gas infrastructure

Workers work on installing a new 18 inch valve medium pressure header main on the 5200 block of W. Grace in Chicago. People's Gas is undergoing a massive underground overhaul of its residential natural gas pipe system.

( José M. Osorio, Chicago Tribune / April 24, 2012 )

Workers work on installing a new 18 inch valve medium pressure header main on the 5200 block of W. Grace in Chicago. People's Gas is undergoing a massive underground overhaul of its residential natural gas pipe system.

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