1930s Pipeline Replacement Project (CIPP)
The City is replacing all of the wastewater lines installed in 1936, the year when the first wastewater system was installed as part of President Franklin Roosevelt's Works Progress Administration to put people to work during the Great Depression.
The original pipe has reached the end of its useful life and must be replaced to keep your sewer system working in top condition. Wastewater Services is replacing a portion of the old pipe every year. The new pipe should last another 70 years.
This year's replacement project is done in 2 phases. First, a new CIPP mainline and new cleanouts on laterals near property lines will be installed; second, new CIPP laterals will be installed.
Cure-in-Place Pipe (CIPP)
CIPP is the process of pulling a resin-saturated felt tube into a damaged pipe, inflating it, and then curing the resin with hot water to form a tight-fitting, jointless, and corrosion-resistant replacement pipe inside the damaged pipe. Service laterals are reconnected with remote-controlled robot devices. Little to no digging is required. This process is more environmentally friendly and produces longer lasting replacement pipes than traditional repair methods.
The lining phase is complete. The only work remaining is the lateral grouting, which will take place after the holidays. This remaining work is low impact.
For more information contact Andrew Thorne at 503-618-2190 or Andrew.Thorne@GreshamOregon.gov
This Capital Improvement Project is funded through utility bill rates, a portion of which is designated to pay for repair and replacement projects.