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The black ruggedised microduct used by Chorus does have a tracer wire. Basically, if your fibre lead-in is not laid in a PVC duct, it is almost certain to be in ruggedised microduct, which means the Dial B4 U Dig people should easily be able to find it.
If it's in a PVC duct, it's probably not ruggedised. It really depends on your situation. If you had an existing serviceable copper duct, the technician may have used the same duct to haul the fibre in to your house. But if your house is older and the copper was direct buried, then the tech is likely to have also direct buried the fibre in ruggedised microduct.
I tested a piece of the ruggedised microduct and found it to be fairly hardy. I attacked it with a sharpened serrated spade by repeatedly stabbing at it on a concrete pathway in an attempt to cut it (and standing/jumping on the spade with the cable wedged under the spade blade), I also tried cutting it with household scissors. Both attempts only caused surface abrasions and didn't get through the outer sheath. I did successfully cut through it with secateurs (albeit with reasonable force).
I'd imagine any large powered tool such as a rotary hoe could concievably cut through it, but more likely it would catch the cable around the rotor and then rip the whole cable length out of the ground in its entirety without severing it - the weakest points being the joints at the FTP and boundary.
In your case it looks like you should find the end of the green conduit where your driveway meets your lawn and do some exploratory digging there to confirm whether the green duct ends there, or if it continues under the lawn.
The views expressed by me are not necessarily those of my employer Chorus NZ Ltd
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