15 unchanged sentences
When considered cost beneficial by the Company, Marshall Miller further conducts a pre-feasibility study to estimate our coal reserves and classify such reserves as either proven or probable.
−Removed: The estimates and reports prepared by Marshall Miller are reviewed by our personnel to ensure such reports have been prepared in accordance
−Removed: with applicable rules and regulations and that estimates are based on reasonable assumptions and reflect known facts and circumstances updated through year-end.
+Added: The estimates and reports prepared by Marshall Miller are reviewed by our personnel to ensure such reports have been prepared in accordance with applicable rules and regulations and that estimates are based on reasonable assumptions and reflect known facts and circumstances updated through year-end.
Economic analysis is a required part of the process of estimating coal reserves and resources.
17 unchanged sentences
Total 315,957 190,761 125,196 8,716 307,241 153,776 162,181
−Removed: (1) Minimum seam height 30 inches for underground mines.
+Added: (1) Minimum seam height generally 30 inches for underground mines.
Coal Reserves (Tons in thousands)
12 unchanged sentences
(2) Recovery percentage defined as estimated coal reserves divided by related estimated in situ measured and indicated coal resources.
−Removed: In determining an initial assessment for purposes of determining coal resources as of December 31, 2022, the following estimated market pricing was utilized:
+Added: In performing an initial assessment for purposes of determining coal resources as of December 31, 2023, the following estimated market pricing was utilized:
Complex Market Pricing Per Ton (1) (2)
8 unchanged sentences
In Situ Coal Resources (2)
−Removed: Reserve Control Stage / Permit Status Exploration Stage
+Added: Resource Control Stage / Permit Status Exploration Stage
Mining Complex Location Total Indicated Measured Owned Leased Permitted Not Permitted
36 unchanged sentences
12/31/2022 12/31/2023
−Removed: Mining Complex Coal Reserves Acquired/Leased Production Pre-Feasibility (1)
−Removed: Change in Mine Plan Other (2)
−Removed: Coal Reserves
+Added: Mining Complex Coal Reserves Acquired/Leased Pre-Feasibility (1)
+Added: Change in Mine Plan Divested (2)
+Added: Production Coal Reserves
Aracoma 40,114 — 2,957 820 — (2,615) 41,276
5 unchanged sentences
Total 336,706 354 9,831 (2,069) (13,902) (14,963) 315,957
−Removed: (1) Mineral areas initially subjected to Pre-feasibility study in current period.
−Removed: (2) Mineral reclassified based on change in expected processing location.
−Removed: The Company plans to develop a new underground mine and re-start its idled Elk Run processing plant (acquired in 2018) in 2024.
−Removed: Coal is expected to be processed at the Elk Run plant and loaded on the CSX rail for delivery to customers.
+Added: (1) Mineral areas subjected to Pre-feasibility study in current period.
+Added: (2) Mineral control released through transfer, termination or lapse of lease, or sale of property.
Changes in Coal Resources (Tons in thousands)
1 unchanged sentence
Mining Complex Coal Resources Initial Assessment (1)
−Removed: Change in Mine Plan Other (2)
−Removed: Coal Resources
+Added: Pre-Feasibility (2)
+Added: Change in Mine Plan Divested Production Coal Resources
Aracoma 143,815 — (14,029) 1,597 — — 131,383
7 unchanged sentences
(1) Mineral areas subjected to initial assessment in current year.
−Removed: (2) Mineral reclassified based on change in expected processing location.
−Removed: The Company plans to develop a new underground mine and re-start its idled Elk Run processing plant (acquired in 2018) in 2024.
−Removed: Coal is expected to be processed at the Elk Run plant and loaded on the CSX rail for delivery to customers.
+Added: (2) Mineral areas subjected to Pre-feasibility study in the current year.
Internal Controls Disclosure
16 unchanged sentences
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.