By Roy L Hales

Some of PSE&G’s (PSE&G) natural gas  pipelines were laid down a century ago. The New Jersey utility continued using cast iron until the 1950s. Now there is approximately one methane leak for each of the pipeline’s 3,900 miles. Though PSE&G intends to replace the entire cast iron and unprotected steel infrastructure, this is too costly ($1.5 million to $2.0 million per mile)to do overnight. With the help of new technology developed by Environmental Defense Fund (EDF), Google and Colorado State University. PSE&G is natural gas pipeline emissions by 83% in the area surveyed area, while replacing about 1/3 less mileage to do so.