Colorado utilities are paying more for Wyoming coal

Laramie, WY – The price of coal from the Powder River Basin has risen 67 percent to $13.80 a ton.
The price has risen as more Wyoming coal is shipped to the East Coast as well as overseas, including China. It's apparently selling Colorado now for five dollars a ton.
Analyst James Rollyson said that even if coal jumps to $17 a ton it would still be cheaper to use than natural gas.
Nearly 60 percent of Colorado's electricity is generated by coal power plants although the state's largest utility, Xcel Energy, has proposed replacing three with plants fired by natural gas.