Will Power Company bury high voltages cables?

[Geek-9pm]

Hey, it is off topic. But some of you may know the answer.
Here in California the is much use of hydroelectric power. But the reservoirs are a long ways from the big cities, So high voltage wires are stun up and down the state for hundreds of miles.
You know that. What is new is the fear of  range fires from electric cable sparks in high winds on hot and dry days. Some towers have wires above 50 kilo volts. Now they are telling the public they shall bury cables in the worst areas.

Is that a joke? 

Is there really a viable way to bury high voltage cables.
Does anybody anything about how they might bury high voltage wires?

I don't believe what they say. Please tel me I am wrong! 

Here are links that have recent news about PG&E in California.
https://www.latimes.com/opinion/readersreact/la-ol-le-camp-fire-electric-lines-20190517-story.html

https://www.pge.com/en_US/residential/customer-service/other-services/electric-undergrounding-program/electric-undergrounding-program.page

You can find some videos. I found these on Bing

Videos of Pacific Gas and Electric to bury power cables.

What do you think?

[Salmon Trout]

Burying high voltage cables is expensive, but it can be done. In Britain, where an overhead high voltage transmission line might spoil an area of natural beauty, cables carrying 400 kV have been buried. The technology is well established, and the main problem is the cost. Insulated cables are more expensive, it is more expensive to dig and bury than to build towers, and for a buried line the conductors need to be bigger to reduce heat from resistive losses. If the political will is there it can be done.

UK Grid company report here https://www.nationalgrid.com/sites/default/files/documents/45349-Undergrounding_high_voltage_electricity_transmission_lines_The_technical_issues_INT.pdf