South32 has lowered the estimated coal reserves at its Illawarra Metallurgical Coal project.
The diversified miner says coal reserves for the Bulli seam have been reduced by 22 million wet metric tonnes to 114 million following conclusion of a commercial agreement to relinquish a portion of its mining lease in the Appin area.
Coal reserves for the Wongawilli seam were unchanged, it said in a statement.
The Illawarra project accounts for nearly all of South32's coking coal output.
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