When Duke Energy Corp. proposed the Edwardsport plant in southwest Indiana in 2006, the project was billed as a "technological marvel" that would help usher in a new era of clean coal — a pillar of Duke's plan to be a climate change leader under then-CEO Jim Rogers. While much cleaner than conventional coal, an IGCC plant's complex systems are also what turbocharged Edwardsport's cost and the challenge of keeping it running smoothly — a reality the plant's operators are still grappling with.