I work for a civil contractor here in WA and our DBYD is actually pretty good and semi-accurate.
We have pretty strict guidelines and managerial KPI's relating to service strikes. I've know contractor's project manager sacked for a strike on a known service. We will also get taken off tender lists based on our performance on and around services.
The point being that we certainly take underground services very serious, but as JayBoRover wrote, it is sometimes near impossible to avoid when they are so old that they are either not marked at all or in a completely different location from where they are shown to be.
Believe me when I say we will not and cannot proceed if a service is shown on DBYD until we physically locate and visually verify its position.
Personal experience has however shown that the Telecommunication network is usually the worst ones for not being where they should be or actually not being shown and indicated at all.
Cheers,
Lou
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