Coal Reserves

	43-101 PROPERTIES AS OF 12/31/2023
MNT (Moist, Recoverable Basis)	PROVEN	PROBABLE	TOTAL	PERMITTED	NOT PERMITTED
Surface-mineable	1,811	-	1,811	1,296	515
Auger-minable	18	-	18	18	-
Highwall-mineable	203	-	203	203	-
Underground-mineable	27,467	8,385	35,852	16,710	19,142
Total	29,499	8,385	37,885	18,227	19,657
Casselman (UG)	4,721	1,430	6,151	4,434	1,717
Acosta (UG)			-		-
Upper Kittanning	7,609	1,494	9,103	-	9,103
Middle Kittanning	3,267	956	4,223	4,223	-
Total Acosta (UG)	10,876	2,449	13,326	4,223	9,103
Horning (UG)	1,350	212	1,562	1,562	-
A-Seam (UG)	5,695	797	6,491	6,491	-
Keyser (UG)	4,825	3,497	8,322	-	8,322
All Other	2,032	-	2,032	1,517	515
Grand Total	29,499	8,385	37,885	18,227	19,657

 

Coal Qualities

		WEIGHTED COMPOSITE (MOIST BASIS) AS OF 12/31/2023
RESERVE AREA	SEAM	RECOVERY	ASH	SULFUR	BTU	VM
SURFACE-MINEABLE
Rhoads	Upper Kittanning	92.8%	7.3%	0.5%	12,400	18.5%
Rhoads	Middle Kittanning	64.3%	10.2%	1.1%	12,700	15.6%
Rhoads	Lower Kittanning	75.2%	8.7%	1.6%	13,000	15.9%
Schrock Run	Lower Freeport	94.4%	6.0%	0.7%	13,300	16.5%
Schrock Run	Upper Kittanning	87.9%	8.7%	1.2%	12,900	17.2%
Shaffer	Lower Freeport	94.2%	6.4%	0.7%	13,400	17.7%
Hamer-Byers	Upper Freeport	75.8%	8.7%	0.9%	-	19.9%
Hart	Upper Kittanning	65.4%	10.3%	0.9%	13,100	-
Will Farm	Lower Kittanning	73.5%	8.0%	1.0%	13,100	-
Total		78.6%	8.2%	0.9%	13,100	17.2%
AUGER-MINEABLE
Rhoads	Upper Kittanning	92.8%	7.3%	0.5%	12,400	18.5%
Rhoads	Middle Kittanning	64.3%	10.2%	1.1%	12,700	15.6%
Rhoads	Lower Kittanning	75.2%	8.7%	1.6%	13,000	15.9%
Hamer-Byers	Upper Freeport	75.8%	8.7%	0.9%	-	19.9%
Total		76.0%	8.8%	1.2%	12,800	16.7%
HIGHWALL MINER
Schrock Run	Upper Kittanning	87.9%	8.7%	1.2%	12,900	17.2%
Total		87.9%	8.7%	1.2%	12,900	17.2%
UNDERGROUND-MINEABLE
Casselman	Upper Freeport	79.9%	7.8%	1.1%	-	20.8%
Acosta	Upper Kittanning	81.0%	10.1%	1.8%	14,600	22.1%
Acosta	Middle Kittanning	71.5%	13.9%	1.4%	15,500	19.0%
Horning	Lower Freeport	75.0%	9.8%	1.3%	14,100	18.1%
Keyser	Lower Kittanning	74.1%	7.3%	1.5%	14,600	20.5%
A Seam	Brookville	55.5%	11.2%	0.80%	13,700	18.9%
Total		72.0%	9.9%	1.3%	14,500	20.3%
Grand Total		72.3%	9.8%	1.3%	14,400	20.2%