u/Far_Space_386

I live in Minnesota and was told that sprinkler lines up here are generally buried roughly 14 inches below ground. I had the yard aerated today and one of the lines got punctured. After digging it up to my surprise the line was only 5 inches below the ground. These were installed about 2 years ago. Is this against industry standard?
Also as far as the repair goes, I plan on 1) shutting of the water 2) cutting the punctured section 3) inserting a coupling with the metal hose clamps on either end. Am I missing anything?

First time doing anything like this. Appreciate the help! Thank you!