Article appeared in Trenchless Technology --
A state subsidiary of one of the largest publicly traded water and wastewater utility companies in the United States, New Jersey American Water serves almost 3 million people through 8,600 miles of water and sewer mains ranging in size from 2- to 72-in. in diameter. More than half of the New Jersey American Water distribution system consists of pre-1960s pipelines that require ongoing pipeline rehabilitation of approximately 100,000 ft of pipe every year.
Pipeline rehabilitation typically adds several decades of additional service life. However, one particular rehabilitated water main started leaking and breaking in many different locations simultaneously — less than five years after being cleaned and lined. The costly and time-consuming cleanup and emergency pipeline replacement sent New Jersey American Water in search of a way to avoid similar situations in the future.
"What happened is that we removed the accumulated tuberculation that was essentially holding it together and ensuring pipe integrity," says Wolan. "But the real problem was automatically assuming that a rehabilitated pipe was structurally sound. We needed hard data about the true condition of our pipes — and that's when we began investigating new technology solutions from Echologics that would help us optimize our pipe rehabilitation programs."