@Ron beat me to it.
This isn't a small percentage increase. It costs many billions to do this kind of infrastructure. Hell our rates are going up 10% just bc they're running new overground lines in from other states.
So where does the money come from?
You can do it at the private (ish) utility level so its spread evenly based on consumption and harder on lower level consumers, or at the state level so its spread across some other factor like income tax, property tax, whatever. Pick a poison.
Or you jusy bitch about the follies of overground power distrobution while enjoying more money in your pocket.