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The original item was published from 4/27/2020 3:27:00 PM to 5/30/2020 12:05:02 AM.

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Water Resources

Posted on: April 26, 2020

[ARCHIVED] Sewer Rehabilitation Projects Spring 2020

The Water Resources Division of the Department of Public Works is working with specialized contractors to rehabilitate sewers throughout the City using ultra-violet light and trenchless technology. 

This work is expected to begin late April and continue through the summer. The contractors will complete a pipe segment or two per day and then pack up and move on to the next pipe segment. The work is dependent on weather but impacted properties will receive a letter in the mail and a door hanger just prior to the work being completed.

The sewer rehabilitation is trenchless, meaning there is no digging required. The contractor will pull a resin-filled liner into the existing sewer, inflate it, and then utilize ultra-violet light to cure and harden the liner. This process will essentially create a new pipe that will prevent roots and extra water from entering into the sewer. Sewers are being rehabilitated because there had been a blockage from tree roots or the pipe is fractured and could collapse if not taken care of. This technology allows the City to fix sewers in a day rather than much longer with traditional dig and replace.

Here is a helpful video which explains the process: Ultra-Violet Cured-In-Place-Pipe Lining Technology

While the process does not require any digging, it will cause the lateral (the pipe from a property to the sewer) to be blocked for a couple of hours during the day while the liner is cured and the lateral connections are cut out to restore service. Please limit heavy water such as showering and laundry during this time as excessive water use could back up in the lateral. Impacted properties should be able to use normal amount of water during the morning and evening hours. If a sump pump is tied into the sewer (they shouldn’t be), it may back up. If you experience a backup, please let the contractor know.

Street parking in and around the work area will be limited and may be coned off. Please respect the signage to allow the work to be completed. Depending on the work area, the street may be marked “local traffic only” to limit the amount of vehicles traveling on the street.

We appreciate your cooperation and limited water usage during the work. 

If you have any questions or would like to learn more about sewer rehabilitation in the City of Portland, please send an email to Benjamin Pearson, PE at bnp@portlandmaine.gov - Compliance Coordinator for the Water Resources Division of the Department of Public Works

Example Notice of Work Letter
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