[Eric in the Ozarks]

PRB coal is 8500 BTUs. Illinois Basin would be in the 11,000 range.

[Iris7]

Thanks, Eric. Should have been more careful.

My coal consumption estimate was wrong for more reason than overestimating HHV and so water consumption was also. Say 30,000,000 gallons per day, not 169,000,000, and 55,000 households not 375,000. A 10" pipe not a 24".