Rio Tinto plc - 1999 Mine-by-Mine Operating Results
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Mine Ore treated ('000 t) Grade (g/t) Gold production (oz) Cash cost (US$/oz) Total cost (US$/oz)

Gold Mines:

Kelian §

Indonesia (90%)

7,673

2.3

440,000

n/a

n/a

Cortez/Pipeline §

US (40%)

3,835

11.2

1,329,000

n/a

n/a

Peak ¶

Australia (100%)

598

7.6

127,000

n/a

n/a

Rawhide §, US (51%)

6,129

0.9

113,000

n/a

n/a

Morro do Ouro §

Brazil (51%)

17,475

0.5

189,000

n/a

n/a

Lihir §, PNG (16.3%)

2,911

7.0

625,00

n/a

n/a

Barneys Canyon

US (100%)

2,331

2.4

112,000

n/a

n/a

Copper-Gold Mines:

Bingham Canyon §

US (100%)

56,595

0.3

367,000

n/a

n/a

Grasberg ¶ § #

Indonesia (12.6%)

80,561

1.4

3,086,000

n/a

n/a

Escondida §

Chile (30%)

46,023

n/a

150,000

n/a

n/a

Attributable total

. .

2,987,000*

n/a

n/a

Underground § Open pit * Includes 194,0000 oz from other sources.

(Source: World Gold)