Quote:
Originally Posted by curves2000
Facts are weather, cold weather, location of the pipe and more all increase the length of time for the repair as per the City of Calgary since your all about facts and solving problems. I can't believe I am actually arguing with someone from Canada about what happens to water outdoors when it's exploding from the ground everywhere and it's -25 out. A hockey fan no less! LOL. This conversation is beneath me at this point and I am out.
https://www.calgary.ca/water/custome...r-outages.html
" The time it takes to fix a break varies due to several factors including the size of the break, digging in frozen ground, how quickly the break can be located, and the current weather conditions."
"How does temperature impact water mains?
The longer the temperature stays below freezing, the deeper the frost goes, putting pressure on water main and service pipes. Winter frost depths in Calgary typically range from two to three metres. Frozen ground increases the amount of time required to access the water pipes, resulting in a longer time frame to restore water. Pipes are buried around three to four metres deep." |
So they are going to dig up the frozen ground which will take a little longer. Then they will pump out all the water. If they keep the velocity up it won’t freeze before it leaves the hose. Then you hoard in the dug out area, heat it with heaters and do the same repair you would normally. You probably are leaving the hoarding in place all winter because you do t want the line to freeze with non compacted soil over top. It took them 36hrs to drain and dig out the line. So that takes 3 times as long as in summer so an extra 3 days.
What’s your concern again?
I think you also miss that this line carries 60% of our water but we also are able to produce 500 million litres right now so total capacity is 1.25 billion litres. Given that we typically use about 600 million litres right now and peak in the heat dome a few years ago we used 800 million it looks like we have significant enough redundancy to whether a large water main break with the worst case damage being minor inconvenience.