Site work for a water / sewer project in Wilmette, Illinois. Conceptual plans call for site work for a water / sewer project.

Sewer lining is a non-invasive technique used to rehabilitate storm sewers by eliminating infiltration, structural defects, and root intrusion. Many of the storm sewers in the Village were installed over 100 years ago, so the list of sewers identified as needing sewer lining grows each year. This expenditure is proposed to be an annual program to address the deterioration of the Village's storm sewer system. The annual lining program currently focuses on the sanitary and combined sewer systems with the intent of reducing infiltration, which contributes to basement backups and combined sewer overflows. The focus of this program will be specific to storm sewers that are in disrepair and that are part of the annual road program. Storm sewers are often in the curb line of streets and are susceptible to degradation from root intrusion from parkway trees. Sewer lining is a more cost-effective way to rehabilitate sewers that exhibit structural defects such as cracks, broken pipe, and holes, as well as deterioration caused by root intrusion when compared to the alternative of excavating and replacing. Lining the sewers would increase the structural integrity of the lines, avoiding collapse and more costly replacement. There are 344,700 linear feet of storm sewer owned by the Village and approximately 10,250 linear feet of storm sewers have been identified that require rehabilitation. More storm sewers are expected to be added each year as sewer televising inspections are completed ahead of the annual road program. As of February 9, 2024, this project is included in the city’s 2024-2028 Capital Improvement Program (CIP). Construction scheduled for FY2025/2027 and is funded FY2025-2033. *Project information has been obtained through a public capital improvement plan (CIP). A CIP is a financial schedule for short- and long-range projects which is updated regularly. Information listed in the CIP often evolves based on funding availability and the project details, including timeline and value, are subject to change. The content management team will continue to pursue additional details as they become available.