That's funny you mentioned that Matt. There was a couple posts back 4 or 5 years ago where all the mines products were displayed. Ash percent, Btu's/lb., volitiles, etc. IIRC,,,and that's a big IF, the top 5 tests came from mines with red ash. Superior, C. Lenig's, UAE, Summit, Sherman. At the time, the mines they were pulling from were mostly red ash.
I would love to see those test results, I have been around coal my entire life living in the heart of the coal region, and I can assure you people in these parts, especially the old timers who mined and know coal, DO NOT want red ash coal if given a choice.