Washington - Mill Streets Sanitary Sewer Cleanout & Rehabilitation

The City of Naperville Department of Public Utilities-Water is contracting with Performance Pipelining, Inc. (PPI) to rehabilitate the City's sanitary sewer laterals in the Old Naperville neighborhood between Washington and Mill St and from 9th Ave to 5th Ave. Crews will generally work Monday – Friday from 7 a.m. – 3:30 p.m. from May 30 to late November/early December 2023, pending unforeseen circumstances. Occasionally it may be necessary that the work continues beyond 3:30 p.m. The project goals include:

  • Extend the life of the sanitary sewer system.
  • Improve the efficiency of the sanitary sewer system.
  • Reduce the risk of sewer backups, overflows and leakage.

Construction Impacts and Accessibility

The project requires minimal excavation and will avert tree loss, landscape damage, and long-term traffic inconveniences.

Work zone: Streets in the impacted area will remain open to traffic and deliveries and emergency vehicles throughout the project’s duration. Driveways will be accessible during the work day. Mail delivery, garbage and recycling will be unaffected by the construction. The sanitary sewers are located underground in parkways, streets, and sidewalks.

Please note: Crews will do their best to minimize the impact of this work on traffic, but construction involves some level of inconvenience.

Residential Water Service Impacts

Water mains will remain in service. During the Phase 4 liner installation process, PPI will ask some residents to refrain from using water from sinks, bathrooms, laundry, dishes or drains for up to four hours. This is because the water could interfere with the liner installation process. PPI will provide 24-hour notice to the impacted residents.

Project Phases: Work Processes and Expectations

Phase one: Locate the sewer lateral.
• Crews will use a camera from the public sewer main to locate the sewer lateral.
• The sewer lateral is a pipe that connects a home or business to the public sanitary sewer system.
• The lateral carries wastewater from the home or business to the sewer main, then transports it to a wastewater treatment plant.
• A white stake or a small spray-painted square will mark the cleanout's location.

Phase two: Install the cleanout.
• A high-pressure vacuum truck will use water excavation to break ground and expose the lateral.
• Crews will install the cleanout and inspect it for leaks.
• After crews backfill the trench, a 4- or 6-inch PVC cleanout will be visible at grade.
• If workers install the cleanout within a sidewalk, crews will cover it with a cast iron "mini manhole" surrounded by cold patches (i.e., temporary asphalt).
• The City of Naperville will rehabilitate any disrupted sidewalk squares or landscape.

Phase three: Inspect and clean the lateral.
• Crews will inspect the lateral and clean off all tree roots and other blockages using the cleanout.
• PPI will then retrieve an accurate measurement for the liner installation.

Phase four: Install the liner.
• Crews will prepare and install the liner using the cleanout and public sewer main, which can take up to four hours.
• Please note that PPI will provide 24-hour notice asking that residents not use water from sinks, bathrooms, laundry, dishes, or drains during installation. In addition, the letter will request residents to ensure there is water in all the floor drains to prevent the possibility of sewer gas and odors from entering a home or business.