Page 302 - Annual Report 2020

Energy 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 Mining Coal Interest
Deposit (1) (2) Method Type Mt %Ash %VM %S KCal/kg CV Mt %Ash %VM %S KCal/kg CV Mt %Ash %VM %S KCal/kg CV Mt %Ash %VM %S KCal/kg CV % Mt %Ash %VM %S KCal/kg CV
Energy Coal Operations
Australia
Mt Arthur Coal OC Th 814 21.5 31.2 0.65 6,170 1,333 19.4 29.9 0.61 6,150 1,255 20.6 29.3 0.62 6,050 3,402 20.3 30.0 0.62 6,120 100 3,423 20.4 30.0 0.62 6,120
Colombia
Cerrejón (3) OC Th 2,989 3.9 34.9 0.52 6,560 1,173 3.9 34.8 0.51 6,570 620 4.7 34.0 0.55 6,370 4,782 4.0 34.8 0.52 6,539 33.33 4,600 3.9 34.8 0.52 6,540
Energy Coal Project
Australia
Togara South UG Th 719 12.1 29.6 0.31 6,700 177 13.5 28.9 0.31 6,500 1,051 16.8 28.4 0.31 6,210 1,947 14.8 28.9 0.31 6,420 100 1,947 14.8 28.9 0.31 6,420

Coal Reserves
As at 30 June 2020 As at 30 June 2019
Proved Probable Total
Reserves Reserves Reserves Proved Marketable Reserves Probable Marketable Reserves Total Marketable Reserves Reserve BHP Total Marketable Reserves Reserve
Commodity Mining Coal Life Interest Life
Deposit (1) (4) (5) (6) Method Type Mt Mt Mt Mt %Ash %VM %S KCal/kg CV Mt %Ash %VM %S KCal/kg CV Mt %Ash %VM %S KCal/kg CV (years) % Mt %Ash %VM %S KCal/kg CV (years)
Energy Coal Operations
Australia
Mt Arthur Coal (7) (8) OC Th 269 299 568 211 15.9 28.6 0.52 5,990 225 14.7 28.2 0.46 6,100 436 15.3 28.4 0.49 6,050 20 100 453 15.3 28.4 0.49 6,050 21
Colombia
Cerrejón (9) (10) OC Th 192 137 329 186 12.3 32.3 0.61 6,070 133 11.0 33.0 0.60 5,980 319 11.8 32.6 0.61 6,032 14 33.33 333 11.2 32.4 0.61 6,101 15
(1) Cut-off criteria:
Deposit Coal Resources Coal Reserves
Mt Arthur Coal ≥ 0.3m seam thickness and ≤35% raw ash ≥ 0.3m seam thickness, ≤ 32% ash, ≥ 40% coal washery yield
Cerrejón ≥ 0.35m seam thickness ≥ 0.35m seam thickness
Togara South ≥ 1.5m seam thickness −
(2) Qualities are reported on an air-dried in situ basis. Tonnages are reported as in situ for Mt Arthur Coal and Togara South, and on a total moisture basis for Cerrejón.
(3) Cerrejón – The Coal Resources are restricted to areas which have been identified for inclusion by BHP based on a risk assessment.
(4) Approximate drill hole spacings used to classify the reserves were:
Deposit Proved Reserves Probable Reserves
Mt Arthur Coal 200m to 800m (geophysical logged, ≥95% core recovery) 400m to 1,550m (geophysical logged, ≥95% core recovery)
Cerrejón >6 drill holes per 100ha 2 to 6 drill holes per 100ha
(5) Overall product recoveries for the operations were:
Deposit Product Recovery
Mt Arthur Coal 77%
Cerrejón 97%
(6) Total Coal Reserves were at the moisture content when mined (9% Mt Arthur Coal; 13.2% Cerrejón). Total Marketable Reserves were at a product specific
moisture content (9.6% Mt Arthur Coal; 14.5% Cerrejón) and at an as received quality basis for Mt Arthur Coal and at a total moisture quality basis for Cerrejón.
(7) Mt Arthur Coal – Coal is delivered to handling plant.
(8) Mt Arthur Coal – Mining studies are in progress that may result in changes in the mine design and the Coal Reserves.
(9) Cerrejón – Marketable Coal Reserves decreased due to depletion partially offset by improved resource classification supported by additional drilling.
Coal is beneficiated by exception.
(10) Cerrejón – In response to ongoing local community legal challenges, some permits remain suspended. BHP continues to monitor the situation for potential
impact on mining.

300 BHP Annual Report 2020