Based on our discussion on Right-of-Way access at our July meeting I approached our Engineering department here in Airdrie. Here is what they had to say:
Utility companies are required to apply for line assignments within City rights of way (i.e.: roads, parks, etc.) They are granted an alignment at which time they typically state on the plans the depth they are going (typically 1 meter deep). I do not receive as-builts from these companies. Most companies do not provide as-built depths because they are reluctant to say they are 3 feet deep when someone may have changed the grades and they are actually only 1.5 feet deep.