Subject: Re: Underground Transmission Lines
It seems very likely that it is INSANE to considering high voltage lines at that cost.

There is a way to double grid capacity, make it safer, and not have to add a single tower or clear any environmental regulations. It’s called “Reconductoring” the lines.

Most of our existing power lines consist of a steel core surrounded by strands of aluminum.

In reconductoring, advanced conductors replace the steel core with a core made of a composite material, such as carbon fiber that’s not only lighter but stronger. This might seem like a very subtle shift in materials and design; however, it allows power lines to operate at higher temperatures and sag less, significantly increasing their load capacity.

Whereas advanced conductors cost 2-4 times more than conventional power lines, upgrading existing lines using advanced conductors actually costs less than half what a new power line would cost because it does away with much of the construction spending as well as fees from permitting for new rights-of-way, with power companies only needing to apply for a maintenance permit to put new wires, the researchers have found.

https://oilprice.com/Energy/En...

Along with this is would be fairly trivial to add remote monitoring and the ability to shut down high tension wires during significant weather events, especially if a distributed model of conduction was employed to go around lines that had been temporarily shut off. Going underground with all of this is fantasy!