Pipe Materials in Calgary Presentation Slide #17

And 1978-79 were the worst years of all, as the break rate, helped along by some cold winters, skyrocketed from 800 to 1200 per year. It was around this time that we pulled out a few pipes that were less than 10 years old. If there had been any doubt that we had to get a grip on corrosion control, these years put an end to it.