Resumption of work on the Alton sewer project

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ALTON – Work to replace Illinois American Water’s storm sewers in Alton has resumed after the holidays as the company works to separate Alton’s combined sewer system and install new sanitary sewers.

More than six miles of sanitary sewer line is being installed in the Alton, Turner Tract, Shields Valley and Piasa Valley areas. Work started in February and will continue until 2023.

When Illinois American Water acquired the Alton regional wastewater system in 2019, the company made a commitment to meet the requirements set out by the Illinois Environmental Protection Agency to address combined sewer overflows.


In the Turner Tract area, the west end of the lane west of Lincoln Street between McPherson and Douglas streets is closed to traffic. The lane south of McKinley Boulevard is expected to be closed east of Lincoln from soon, with Douglas Street east of Lincoln Street scheduled to close later in January.

In the Shields Valley area, the west end of Greenwood Street is closed. Joesting Avenue is expected to be closed to all traffic over the coming month and will continue to be closed for several weeks.

In the Piasa Valley area, 6th Street east of Alby Street is closed to George Street and Alby Street is closed from 7th Street south to 6th Street. The intersection of 5th and Court Street is also closed.

The southern half of the public square will be closed to traffic, the northern half being temporarily two-way. 7th Street east of the plaza to Alton Street is closed with the next block closed in the coming week or so.

Work in the Piasa Valley area began this spring, focusing on nearly five miles of sanitary sewer line. This work is expected to continue for more than two years, with projects progressing in all neighborhoods during this period.

Signs will be placed prior to construction to notify customers of upcoming closures.

A copy of the long-term control plan can be viewed online at https://www.amwater.com/ilaw/resources/PDF/Water-Quality/ILAW_ALTON_CSO_LTCP_REV.pdf .

Customers with questions are asked to call 800-422-2782.


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