Agreement shut downs Kennecott's 3 coal-burning units

SALT LAKE CITY — Rio Tinto Kennecott and Rocky Mountain Power inked a power purchase agreement that will shut down three coal-burning power units a year ahead of schedule, reducing emissions by more than 3,500 tons a year from the mining giant.The nine-year agreement approved Thursday by the Public Service Commission is the result of a contentious new law regarding Rocky Mountain Power, oversight by the Public Service Commission and what impact it may have to ratepayers."Everybody said wha