You are correct and I was in error.
1600 MW = 1,600,000 KW
1,600,000 Kw * 24 hrs./day = 38,000,000 Kw/hr/day)
38,000,000 Kw/hr/day * 3412 Btu/(Kw/hr) = 130,000,000,000 Btu/day
Western low sulfur coal about 11,000 Btu/lb at 33% efficiency is 3,600 output/11,000 input.
(130,000,000,000 Btu/day)/(3600 Btu/lb) = 36,000,000 lb./day
36,000,000 lb/day * ton/2000lb = 18,000 tons per day. 12.5 tons per minute.
Dang. Was working from memory using info I remember from a different plant. I must have confused pulverizer capacity with full load coal usage. I had better use a pencil, paper and calculator instead of just a calculator these days!
An excuse! An excuse! Quick, blame someone else! At least blame it on coefficient confusion!
Your 25% efficiency is likely more accurate than 33% since you seem to be working from coal to MW/hrs metered into the grid and I was using only coal to generator output.
PRB coal is 8500 BTUs. Illinois Basin would be in the 11,000 range.
Oh no! another mistake. 3413 btus to the net kw not 3412. Of course that is in a 100% eff world. You see how I am.