The City of Joliet provides wastewater services to residential, commercial, industrial, private utilities, and private sanitary districts covering over 40 square miles across Will and Kendall Counties. The wastewater collection system consists of thirty-eight (38) sanitary sewer pumping stations, 478 miles of sanitary sewers with pipe diameters ranging from 3” to 72”, and approximately 7,100 manholes. The age of the system ranges from the late 1800s to the present day and is rapidly aging. Failure to maintain the system can result in sanitary sewer overflows, basement back-ups, and unnecessary treatment of excess water at the wastewater treatment plants.
In 2014, the City initiated a comprehensive sewer inspection program in known problem areas. These inspections included flow monitoring, sewer televising, smoke testing, dyed water flooding, and manhole inspections. Based on these investigations rehabilitation recommendations have been generated to decrease infiltration, increase capacity, restore structural integrity, reduce basement back-ups, reduce sanitary sewer overflows (SSOs), and reduce combined sewer overflows (CSOs). The rehabilitation recommendations for these areas are scheduled to be completed over the next five years (2017 – 2021) with a goal of rehabilitating 1% of the system annually. For a map of the proposed project locations click here. The proposed work will utilize cost-effective rehabilitation techniques such as lining, grouting, and/or replacement to ensure capacity, maintain condition, and minimize overflows due to structural or operational deficiencies.
Construction of the identified projects is dependent upon available funding. It may be necessary for the City to modify the program based upon system needs. For more information about the water main rehabilitation program, please contact the Department of Public Utilities Engineering Department at 815-724-4230.