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

https://www.scribd.com/document/1035806412/Foundation-Repair-Near-Me-3-Pre-Call-Essentials-for-Homeowners-218663

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.