Formed in Place

A manhole rehabilitation system uses special forms to create structural, monolithic, watertight liners that stand up to wear
Formed in Place
Infratech project manager Ed Brown measures the diameter of a manhole to select the proper-size forms.

Installed in the 1920s, the brick and block manholes in Waupaca, Wis., were failing from age. Some were in danger of collapsing. Most had no flow lines, enabling solids to accumulate and create headloss that reduced hydraulic capacity.

The city consulted senior engineer Taryn...

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