Not an expert on this, but why do the cables have to be buried? Couldn't you put them into a trench with some kind of cover, that could be quickly be opened again for maintenance?
That’s one way cables are often routed next to railroad tracks. A concrete trench with concrete covering slabs. I’m sure it’s more expensive than just digging, though it serves to make the cables serviceable.
That’s one way cables are often routed next to railroad tracks. A concrete trench with concrete covering slabs. I’m sure it’s more expensive than just digging, though it serves to make the cables serviceable.