The state basically depended on a high tension line from another state (Victoria) as backup, which largely uses power generated using polluting brown coal. (carlineconomics.com)
third, it is necessary to site nuclear plants near population centers because the energy is gradually lost over miles of high tension lines. (realclimate.org)
I'd be cautious about jackhammer through it in case you hit a tension line etc.. (biggerpockets.com)