The 3 things I learned when I had my foundation repaired that shocked me: city maps of utilities can be wrong

https://blogfreely.net/morvetgbfq/h1-b-top-3-things-to-know-before-calling-a-foundation-repair-company-for-nsnk

The 3 things I learned when I had my foundation repaired that shocked me: city maps of utilities can be wrong, private lines hide everywhere, and 811 marking is non-negotiable.