ST. CLOUD, Minn. (AP) - Thousands of feet of sewer pipe is being replaced in St. Cloud because some is so weak it can be scraped apart with a putty knife.

The $5.14 million project is for pipe serving St. Cloud, Sartell, St. Joseph and Waite Park.

Workers are using a crane with a vacuum to pick up and lower pipe into a 30-foot-deep pit. A crew member uses a remote control to push 54-inch fiberglass pipes into the existing 60-inch concrete pipes.

Assistant Public Works Director Tracy Hodel says despite the size difference, the flow will actually improve.

The project should be done by the end of March. The cold has delayed the project.