"Ice pigging" releases the scales formed on the interior of pipes. A succession of samples show how the ice pigging cleared the pipes.
When municipal water flows through pipes on its way to homes, an inevitable build-up of minerals and what is called "scale" accumulates, and every once in a while, those pipes need cleaning. Lynn Ware Peek has more.
The clock is ticking for Park City to meet the safe drinking water standards for antimony-laced water coming out of the Judge Mine Tunnel. But after the bids for a project to transport the water down to the Quinn's Water Treatment Plant came back $5 million more than budgeted, the city is reworking the project. KPCW's Leslie Thatcher has more.