My guess is that it's more likely due to the cost of digging/right of way, etc. It gets significantly cold here in MN and most powerlines are underground, but w

My guess is that it's more likely due to the cost of digging/right of way, etc. It gets significantly cold here in MN and most powerlines are underground, but we have a lot of open space. A statistic I remember from when I lived there is that Connecticut has more trees per mile of powerline than any other state. Every time there was an ice storm, thousands of people lost power.