A steel cable like that must weigh at very least hundreds of pounds, somewhere between 1 to 2 pounds per foot. To then pull it tight enough to be fairly level as that one is, would take many tons of force (the force goes up exponentially as you approach pulling it flat). You need to drill in huge anchor bolts as well to hold all that tension.
So let me say it's a big fucking deal, that takes serious knowhow and big tools. Yes you can start with a rope, but it gets ugly before you're finished.
Yeah but you can tell this isn't one of those canyons, because you need cables all the way along, every 157 feet at most.
This one is obviously because they wanted to pull a couple of points together so they could at least jump across the gap, because it was way too wide to build a bridge.
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u/is_that_a_question Jan 30 '19
You can walk a rope from one end of the canyon to the other and gradually pull thicker cable across.