City crews will replace the 75-year-old sewer under Talcott Avenue as part of a $7.6 million project. View Full Caption DNAinfo/Heather Cherone

NORWOOD PARK — A $7.6 million project to replace the sewer under Talcott Avenue is expected to snarl traffic in Norwood Park, Ald. Mary O'Connor (41st) said.

The project will replace 12-inch sewer mains with significantly larger pipes in an effort to prevent nearby homes from flooding, O'Connor said.

However, the "massive" project — scheduled to begin the first week of October — will cause street closures and traffic detours along Talcott from Neva to Ozanam avenues and along Neva Avenue from Bryn Mawr to Talcott avenues, O'Connor said.

Crews will begin working on Neva and Bryn Mawr avenues toward Talcott Avenue, and then along Talcott Avenue to Harlem Avenue. Traffic will be detoured around the construction, which is scheduled to be completed by late November, officials said.

The second stage of the project will include replacing the sewer on Talcott Avenue, and require portions of that street to be closed. It will take a year, officials said.

Parking will be restricted from 7 a.m. to 5 p.m. in the area, officials said.

For more information, call 773-594-8341 or email at ward41@cityofchicago.org.

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