Why does Monticello, a 30-year-old plant, deserve recognition as one of POWER's Top Plants of 2006? Because TXU has been blending Powder River Basin (PRB) coal with local lignite at the plant for the past decade, and steady reductions in air-pollutant emission rates have been the result., That positive experience has made the company confident enough to propose building nearly 9,100 MW of new coal- or lignite-fired capacity in Texas by 2010 at a cost of $10 billion. Read on to share some of the lessons that TXU has learned about. handling PRB coal safely.