Investor Presentation

Coal Reserves ⑆CORSA RS, TSX-V: CSO | OTCQX: CRSXF 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 Source: Technical Report dated December 31, 2023. 14

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