3

Looks like it's an old pressure tank. Link No idea why it would be sitting under your lawn, maybe the previous owners replaced it and decided to bury it if they had to pay to get rid of it. Even if the tank itself isn't leaking, maybe there's a membrane inside that is. Looks like the standing one second from the left.


2

These pull boxes are open bottom (most of them) and are meant to have the underground conduits elbowed up into them since they're only 12" deep. Some might have side knockouts but I haven't run across any. The sides aren't intended to have holes knocked out in them. hope this helps. I don't have code backup, only installation backup.


2

Subject to revision depending on your actual loads and how tight the budget is (cheap can be expensive later on, though) I would suggest: 3x 1 AWG aluminum (hot, neutral, hot) 1x 4 AWG Aluminum (but 6 AWG is technically acceptable if cutting it to the bone) Ground. That allows for up to a 100A feed - you may find some use for that, but it also allows for ...


1

There is equipment such as "Ground Penetrating Radar" that can reveal underground artifacts without excavation but the range of such equipment is fairly limited. Another option is to have some "core drill" samples taken on the property, usually in a grid-pattern, to identify any voids or other unexpected materials that may lie beneath the ...


1

Yes, aerial photography is still used to find archaeological sites. But if the tunnels are too deep they will not show up. The resolution of the camera used and the height are also important factors.


1

First, forget 3% That's just the wire size calculators trying to upsell you on wire. Notice they also default to copper :) 3% isn't that important. And NEC even says so; it's an informational note that advises 3% is an ideal to design toward if money is no object. What NEC admonishes is try to avoid more than 8% cumulatively on all segments from the meter ...


1

It would depend on the model. The cast models have recesses that start about 8” down then the recessed channel goes to the bottom. These both in plastic and concrete can be entered from the side but if no recess I would say no.


1

Normally they will only hang their wire on their pole, set in an easement. Your first option "run a power line straight down along the pole" is still your first option. The utility must already have easements to access the pole that would in all likelihood cover burial to your yard. In my State they even need an easement for the overhead to cross neighbors ...


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