To rehabilitate the Newark, New Jersey 150-year-old brick combined sewer system, CDM implemented non-invasive cured-in-place pipe (CIPP) technology, enabling structural rehabilitation without compromising the historic sewers or disrupting traffic in major thoroughfares. CIPP extends sewer system life by 50 to 100 years, and affords considerable cost savings. The construction area is small, enabling fast project delivery through simultaneous rehabilitation at multiple sites and minimizing community interruption.
Proactive upgrade of Newark's brick sewers lowered long-term improvement costs, and safeguarded the public by eliminating potential dangers. Currently, more than 11 miles of sewer ranging from 24- x 20-inch egg-shaped to a 108-inch round segment, have been rehabilitated. The 108-inch line is the largest CIPP installation in the United States to date. Phases III/IV of Newark's rehabilitation program, funded by U.S. Environmental Protection Agency grant money, included closed-circuit TV inspection, assessment of 21 miles of sewer, and a geographic information system (GIS). By applying a priority rating system to rank sewer structural condition, CDM used the GIS to develop repair priorities. Phase V, currently in progress, includes additional data collection, inspections, and as-needed emergency repair designs to address 44,000 feet of brick sewer affected by excessive sedimentation, high flow, and other blockages. CDM updated the GIS to provide data for all sections of the 68-mile system.