I don't understand why it is not just cheaper to clear the above ground rights of way. There are multiple reasons why transmission lines are not typically under

I don't understand why it is not just cheaper to clear the above ground rights of way. There are multiple reasons why transmission lines are not typically underground. The 240 from the pole to the house sure. The 240k from the plant to your local substation not so much. Subterrainian cables are more expensive and less energy efficient than aerials. High capacitive losses, higher maintenance and installation costs, more expensive shielding and jacketing materials needed.