Pipe Materials in Calgary Presentation Slide #08

You can see why when I superimpose the map of all the mainbreaks the area has had since 1960, as red dots. All of the dots on the green PVC happened to the CI or DI pipe that the PVC replaced. Some of the YDI is replacements, but most is original. As you can see, YDI does have some breaks, and a few blocks out here in the far east end are becoming a concern.