I once witnessed a pipe of the same dimensions bursting - the difference being that it was carrying 80 degree celsius hot water for central heating...
It was right under a main street (it's standard procedure to put large pipes under streets so you can get to them if anything goes wrong) and within 10 minutes the street looked like an earthquake had hit it - the massive amount of almost boiling water simply eroded the foundation under the street and washed it away. Tonnes and tonnes of 80 degree hot muddy water gushed up and flowed down the street to a nearby low-lying town square that quickly filled up. Luckily they got it shut off within 20 minutes, but it looked like the gates of hell had been opened with all that water and steam just spewing out of the ground.
Luckily nobody was hurt, but it was an interesting experience.
It was right under a main street (it's standard procedure to put large pipes under streets so you can get to them if anything goes wrong) and within 10 minutes the street looked like an earthquake had hit it - the massive amount of almost boiling water simply eroded the foundation under the street and washed it away. Tonnes and tonnes of 80 degree hot muddy water gushed up and flowed down the street to a nearby low-lying town square that quickly filled up. Luckily they got it shut off within 20 minutes, but it looked like the gates of hell had been opened with all that water and steam just spewing out of the ground.
Luckily nobody was hurt, but it was an interesting experience.