Hmm, you're right. This was a comment made to me about a decade or so ago, when this person was at, or had just left, Liddell power station. It was definitely

Hmm, you're right. This was a comment made to me about a decade or so ago, when this person was at, or had just left, Liddell power station. It was definitely gamed in the way I described - the best coal went into the one burner that was actually monitored - and I'm guessing I since assumed that to mean brown went into the other three. Referring to http://www.resourcesandenergy.nsw.gov.au/__data/assets/pdf_file/0003/576543/Quality-of-coal-deposits.pdf http://www.resourcesandenergy.nsw.gov.au/__data/assets/pdf_f... - it looks like NSW has a range of coal qualities being mined, and I'm sure even slight deltas in price, at the quantities we'd be looking at for a power station that size, would reward this behaviour.