Large Diameter Static Pipe Bursting Solution for Replacement of Lined, Large Diameter Ductile Iron Force Main

Trenchless contractor KRG Utility, Inc., Lenoir, N.C., recently completed an emergency project for the city of Wilmington, N.C. The project included bursting and replacing a ductile iron force sewer main. The city of Wilmington was under a Special Order of Consent (SOC) mandate from the state of North Carolina that prevented the city from starting any new construction development until the force sewer main was replaced or repaired. The main had been lined three times, however, due to the pressure requirements of the main, the liner systems failed under pressure testing. KRG Utility was called in to facilitate a solution to the problem. KRG decided to burst and replace the existing main with High Density Polyethylene pipe (HDPE) utilizing the static bursting method with the most powerful static pipe bursting unit available in the world.