Caliche makes sewer replacement your strongest page, not your worst phone call
The hardest thing to dig through in the valley is also the easiest thing to write about, because almost nobody outside Clark County has to.
Caliche is the hard cemented layer that sits under a great deal of the valley. It is the reason a trench that would take a morning in another market becomes equipment-dependent work here, with cost consequences the homeowner never budgeted for. Any crew that has hit it knows the feeling.
National plumbing content does not mention it. It cannot. A page written in a marketing office two thousand miles away has no reason to know the word, which means a locally written explanation of what caliche does to a sewer line replacement faces almost no real competition.
Write it as an explanation, not a sales sheet. What the excavation actually involves. Why two bids can differ by a wide margin. Why a bid that never mentions the soil is the bid most likely to move mid-project. Stop short of telling a reader what sits under their specific lot, and recommend a site evaluation instead.
The same page does double duty on the phone. When a homeowner has already read why a number might change, the change order conversation is shorter and far less hostile. Bad reviews in this trade are usually about surprise, not about price.