Pete C. wrote:

They don't trench those lines, they just pull them in with a vibratory
cable plow. They certainly won't even look at repairing the existing
cable unless it's an extreme length, they'll just plow in a new cable
and hook it up. It's an hour and a half job or so for the contractor
they use for the work and much of that time is unloading and loading
the cable plow from the trailer.

In my area they use a wide wedge on the bottom of a shovel handle. They step
on the thing to open up a slot in the ground for the required path, then
poke a new wire in the furrow. After the wire is laid, they dance around
like Zulus and stomp the dirt back, covering the wire.