|Index & Notes|
Terms and Assumptions
The entire topic may be mysterious to some: not a lot of cities are yet taking the in-between option of "rehabilitation".
Rehabiliation includes a number of options. Unlike Toronto, Calgary hasn't tried lining yet, and we found only limited cases for short replacements. But we had huge success with cathodic protection. We can hydrovac 15kg anodes into a main every ten metres for about $110 a metre on average, and main breaks then drop by 80% to 90% for the next twenty years or more.
© Roy Brander, P.Eng 2016