Note 9 - Property, Plant and Equipment (Tables)

9 Months Ended

Sep. 30, 2022

Notes Tables

Property, Plant and Equipment [Table Text Block]

	September 30,		December 31,
	2022		2021
Plant and Equipment	$	3,287,698	$	3,209,232
Coal Properties and Surface Lands		894,573		881,551
Airshafts		479,540		473,866
Mine Development		360,810		357,479
Advance Mining Royalties		328,499		328,677
Total Property, Plant and Equipment		5,351,120		5,250,805
Less: Accumulated Depreciation, Depletion and Amortization		3,397,821		3,272,255
Total Property, Plant and Equipment, Net	$	1,953,299	$	1,978,550