Page 298 - Annual Report 2020

Metallurgical Coal

Coal Resources
As at 30 June 2020 As at 30 June 2019
Measured Resources Indicated Resources Inferred Resources Total Resources BHP Total Resources
Commodity Interest
Deposit (1) (2) Mining Method Coal Type Mt %Ash %VM %S Mt %Ash %VM %S Mt %Ash %VM %S Mt %Ash %VM %S % Mt %Ash %VM %S
Metallurgical Coal Operations
Queensland Coal
CQCA JV
Goonyella Riverside OC Met 766 8.8 22.6 0.53 32 11.2 24.3 0.56 40 12.6 25.1 0.54 838 9.1 22.8 0.53 50 856 9.1 22.8 0.53
Broadmeadow UG Met 572 9.4 21.2 0.52 423 10.2 22.9 0.55 15 13.4 24.5 0.59 1,010 9.8 21.9 0.53 1,018 9.8 21.9 0.53
Peak Downs OC Met 1,058 10.2 19.4 0.60 508 10.4 19.1 0.63 424 11.4 20.2 0.75 1,990 10.5 19.4 0.63 50 2,051 10.0 19.6 0.66
Caval Ridge (3) OC Met 332 12.3 22.0 0.56 216 11.9 20.1 0.56 147 11.9 18.8 0.49 695 12.1 20.7 0.54 50 760 13.0 22.1 0.59
Saraji (4) OC Met 803 10.6 17.6 0.64 104 12.0 17.9 0.78 40 11.7 18.6 0.83 947 10.8 17.6 0.66 50 1,023 10.8 17.7 0.66
Norwich Park OC Met 221 9.6 17.6 0.66 128 9.9 17.5 0.71 116 10.3 17.7 0.76 465 9.8 17.6 0.70 50 465 9.8 17.6 0.70
UG Met − − − − 20 9.4 17.4 0.73 22 9.9 17.1 0.65 42 9.7 17.2 0.69 42 9.7 17.2 0.69
Blackwater OC Met/Th 350 5.2 29.6 0.42 528 5.5 29.7 0.44 779 6.6 29.8 0.43 1,657 6.0 29.7 0.43 50 1,659 6.8 27.9 0.42
UG Met/Th − − − − − − − − 222 7.2 29.1 0.36 222 7.2 29.1 0.36 222 7.2 29.1 0.36
Daunia (5) OC PCI 40 9.0 20.8 0.36 14 10.0 19.9 0.30 5.1 13.0 19.3 0.30 59 10.0 20.5 0.30 50 59 10.0 20.5 0.30
OC Met 58 7.0 20.9 0.40 21 7.0 21.1 0.40 5.5 7.0 21.1 0.40 85 7.0 20.9 0.40 92 7.0 20.9 0.40
BHP Mitsui Coal
South Walker Creek OC Met/PCI 207 10.2 13.3 0.31 119 9.4 14.3 0.30 71 10.4 15.7 0.40 398 10.0 14.0 0.32 80 405 10.0 14.0 0.32
UG Met/PCI 36 10.0 13.8 0.31 154 10.4 12.7 0.28 108 9.5 15.2 0.35 298 10.0 13.7 0.31 298 10.0 13.8 0.31
Poitrel OC Met 49 7.9 23.9 0.35 49 8.0 24.1 0.35 59 8.0 24.1 0.36 157 8.0 24.0 0.36 80 163 8.0 24.0 0.36
Metallurgical Coal Projects
Queensland Coal
CQCA JV
Red Hill OC Met − − − − 25 12.4 19.8 0.49 − − − − 25 12.4 19.8 0.49 50 25 12.4 19.8 0.49
UG Met − − − − 1,123 9.8 19.5 0.52 563 10.0 20.4 0.52 1,686 9.9 19.8 0.52 1,686 9.9 19.8 0.52
Saraji East OC Met 458 10.2 16.0 0.63 676 10.3 15.8 0.67 504 10.0 15.3 0.68 1,638 10.2 15.7 0.66 50 1,638 10.2 15.7 0.66
UG Met − − − − 35 8.3 13.6 0.59 16 8.5 13.9 0.59 51 8.4 13.7 0.59 51 8.4 13.7 0.59
BHP Mitsui Coal
Nebo West (6) OC Anth – – – – − − − − 71 10.0 7.2 0.67 71 10.0 7.2 0.67 80 14 9.4 6.6 0.64
Bee Creek OC Met/Th – – – – 9.4 8.9 15.4 0.40 13 9.6 15.0 0.42 23 9.3 15.2 0.41 80 23 9.3 15.2 0.41
Wards Well (7) UG Met – – – – 1,158 8.9 20.9 0.52 149 9.2 20.0 0.52 1,306 8.9 20.8 0.52 80 1,373 8.9 20.6 0.53
(1) Tonnages are reported on an in situ moisture basis. Coal qualities are for a potential product on an air-dried basis.
(2) Cut-off criteria:
Deposit Mining Method Coal Resources Coal Reserves
Goonyella Riverside, Norwich Park, Saraji OC ≥ 0.5m seam thickness, core yield ≥50% and <35% raw ash ≥ 0.5m seam thickness
Peak Downs OC ≥ 0.5m seam thickness and <35% raw ash ≥ 0.5m seam thickness
Caval Ridge OC ≥ 0.3m seam thickness, core yield ≥30% and <35% raw ash ≥ 0.4m seam thickness
Blackwater OC ≥ 0.3m seam thickness, core yield ≥50% and <40% raw ash ≥ 0.3m seam thickness
Daunia OC ≥ 0.3m seam thickness, core yield ≥50% and <35% raw ash ≥ 0.3m seam thickness
Norwich Park UG ≥ 2.0m seam thickness, core yield ≥50% and <35% raw ash −
Blackwater UG ≥ 2.0m seam thickness, core yield ≥50% and <40% raw ash −
Broadmeadow UG ≥ 2.0m seam thickness, core yield ≥50% and <35% raw ash ≥ 2.5m seam thickness
South Walker Creek OC ≥ 0.5m seam thickness, core yield ≥ 50%, <35% raw ash and ≥ 0.3m seam thickness
100m lease boundary buffer
UG ≥ 2.0m seam thickness, core yield ≥ 50% and <35% raw ash −
Poitrel OC ≥ 0.3m seam thickness, core yield ≥ 50% and <35% raw ash ≥ 0.3m seam thickness
Red Hill, Saraji East OC ≥ 0.5m seam thickness, core yield ≥ 50% and <35% raw ash −
UG ≥ 2.0m seam thickness, core yield ≥ 50% and <35% raw ash −
Nebo West OC ≥ 0.5m seam thickness, core yield ≥ 50% and <150m −
below surface
Bee Creek OC ≥ 0.5m seam thickness, <100m below surface, core yield −
≥ 50% and <35% raw ash
Wards Well UG ≥ 2.0m seam thickness and core yield ≥ 50% −
(3) Caval Ridge – The decrease in Coal Resources was mainly due to depletion and removal of coal seams partially off-set by an update in the resource estimate
supported by additional drilling.
(4) Saraji – The decrease in Coal Resources was mainly due to an update in the geological interpretation supported by additional data.
(5) Daunia – The decrease in Met Coal Resources was mainly due to depletion.
(6) Nebo West – The increase in Coal Resources was mainly due to an update in the geological interpretation and increased depth criteria.
(7) Wards Well – The decrease in Coal Resources was due to inclusion of yield in the cut-off criteria.

296 BHP Annual Report 2020