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Excellent post! I wasn't aware the IGN used lignite. I had thought the only western road to delve into sub-bituminous or lignite in a big way was Northern Pacific, burning Rosebud sub-bituminous with a BTU of around 8,800 BTU/lb. As an aside, this coal was unfortunately called "lignite" at the time, instead of sub-bitumininous which has misled a lot of people since then. Aren't economics and geography fascinating? I can learn about this stuff all day. I was just told that oil-fired locomotives on one major road usually had a 10-year heavy overhaul cycle while its similar-sized coal-fired locomotives had a 15-year heavy overhaul cycle, because the locomotives that were oil fired had greater thermal shock cycles in their fireboxes, which tore them apart faster. OS
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