An 8-inch terra cotta sewer was failing in the Town of Newburgh, N.Y. The mainline ran beneath the middle of Neversink Drive in a dense subdivision.Flow problems alerted the Depart-ment of Public Works, but blockages prevented a camera from televising the entire line. The inspection did reveal cracks and holes in the top of the pipe, and root intrusion. Boulders 18 inches in diameter protruded into the line, and joint separations created high and low offsets. Fearing the main’s catastrophic collapse, James W. Osborne, P.E., town engineer, hired Stearns and Wheeler LLC, an engineering firm in Middle-town, Conn., to develop
