Rent one of these:

Rent one of these:

A hoe trowel will make wonders of stony soil… unless we’re talking rock rocks.
C4. Always C4.
Lucky for you, you don't need to dig very deep. Just deep enough to cover the pipe. So a trenching spade is good enough and fast enough for this job. 70m ain't that far. Otherwise a backhoe is best in stony soils. A ditchwitch would be a poor choice because you need to stop and dig every stone out by hand.
don’t need to dig very deep. Just deep enough to cover the pipe. So a trenching spade
That's the plan. It's just my backyard. It's just a cat6 cable. No risk of injury. It's unlikely to be cut by digging and if it ever does...... I'll decide then and there.
Put in posts, and outdoor rated wire... burying that shit is a pain in the ass and you don't have access to it if something ever happens to it (yea it supposed to be fine in conduit and they sell direct burial but in rocky soil that shit will fail eventually). I ran cat 6 uv rated to a barn of mine via cabling and tall posts. I have rock for soil as well, easy to reach and fix if it ever fails. Plus it acts like a bird perch in the am lol
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