![manhole_cover-150x150744808-1](https://dehayf5mhw1h7.cloudfront.net/wp-content/uploads/sites/2455/2025/01/31230040/manhole_cover-150x150744808-1.webp)
| By Big Radio News Staff |
If you spot what looks like smoke billowing from an intersection in your neighborhood, don’t fret.
The city of Janesville is working with Insituform Technologies to repair 3½ miles worth of damaged or deteriorated sewer line.
Steve Jenson, an engineering tech with the city, says the work will continue through April.
In the trenchless process — meaning the street surface doesn’t get dug up — crews run a resin-saturated bag into the existing sewer line.
The bag is then inflated and cured in place using hot water or steam, effectively patching any damage in the existing pipes. Jenson says the life expectancy for the repair is 50 years.
The part of the process visible to the public is the steam being expelled near the manhole where crews access the pipes they are servicing.
Jenson says motorists should slow down and give crews space when they see them working.