A crew from the Department of Public Works found the remains near Saltz and Canton Center roads. They notified Canton Township police, and a death investigation began.
Police said foul play is not expected, but the scene was active Monday evening.
The investigation is taking place next to a subdivision where many people live. Police are searching a wooded area on a dead-end street leading to the subdivision.
Workers were doing sewer maintenance when they went inside the line and found possible human remains. Officials said it's unclear how long the remains have been in the sewer.
Investigators said they will continue to try to remove the remains to learn more about the case.
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Derick is the Lead Digital Editor for ClickOnDetroit and has been with Local 4 News since April 2013. Derick specializes in breaking news, crime and local sports.