Ok guess I don't know (as usual) should have searched further. Was told Pipe lines are all underground. Say what? Really? If so, then why? Would make more sense to be above to be inspected (visually). But I guess out of sight out of mind until the inevitable leak. Leave it above, minimal underground and if have to cross over it, do what they did for wildlife, built a bridge to go over. Banff National Park over or under pass for wildlife.
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