Slide # 23 : Cluster in Time, Spread in Space, Just One

Cluster in Time, Spread in Space, Just One

Here's an example of just one time-cluster, spread out across the main, that we again bet on anodes and won. I like this one, because it's an unusual valve circuit, the main spanning three city blocks. After one break in 87 and another in 1990, it suddenly has this burst of 5 breaks from 1994 through 1997. But we were drastically reducing our main replacement program at the time, and it got missed - then it had no breaks in 98 and 99, we decided to try out our just-invented anode retrofit crew on it in 2000, and it now hasn't had a break since. Another half-million saved.