The Massachusetts Dept. of Public Utilities selected Dynamic Risk Assessment Systems Inc. to analyze the gas state's entire gas distribution system. 

While 45-miles of natural gas pipeline affected by a Sept. 13 gas explosion will be replaced nearly three weeks early, the restoration of full gas service will be delayed by about a month.

Federal investigators said that the Sept. 13 gas explosion in Massachusetts was the result of too much pressure surging through a pipeline. 

The dust has settled from a methane explosion last month that brought down the roof of a sludge concentration building at the Calumet water reclamation plant on Chicago’s far south side, but there is still uncertainty as to what triggered the blast.

Connecticut’s highest court in November rejected the claims of workers seeking lost wages as a result of a 2010 explosion at a power-plant under construction.