Boulder extremely sunny and windy
My hunch is Boulder will do fine transitioning to renewables- it's very sunny and windy in that part of the country. It's also pretty flat - they could set up a pumped hydro storage plant without much trouble. Or just use battieries. They will pay more for juice, but perhaps not as big a penalty as you might think. Maybe 50% more .... which, considering the increased efficiency of newer light bulbs, air conditioners, and refrigerators, could be recouped pretty easily.