Lihir Gold Quarterly Report

Rio Tinto PLC 28 July 2000 The following was announced by Lihir Gold Limited on 27 July 2000 Lihir Gold Limited Quarterly Report to Shareholders 1. Highlights * Significant improvement in profit before abnormal items and tax to US$14.4m in the first half, compared with a loss of US$9.7m during the corresponding previous period. * Charges for operating costs were down by US$5.5m. * Total cash costs for the second quarter fell to US$235/oz. compared with US$250/oz. for the first quarter. * Mining contract with Thiess-Roche discontinued on 17 April with expected mining cost reduction from US$1.94/tonne to US$1.45/tonne. * Production of 141,551 ounces in the second quarter. * New ore reserve statement was released on 28 June reflecting a 21% increase to 13.4 million ounces. * As foreshadowed in the ore reserve release, an impairment provision of US$231m pre-tax (US$150m post tax) has been incorporated as an abnormal item in the profit and loss account in compliance with International Accounting Standard IAS 36. * Hedge book represents just 16% of reserves and 33% of the next 12 years' production. 2. Financial Result for Half Year to 30 June 2000 Lihir is pleased to announce a profit before abnormal items and tax for the half year to 30 June 2000 of US$14.4m compared with a loss of US$9.7m for the previous corresponding period. Revenue increased by US$7.8m due to a 14% increase in the average realised price per ounce from US$361 to US$410. Gold ounces sold were down 5% on the corresponding period last year because, as expected, the average grade dropped to 5.46g Au/t compared with 7.0g Au/t last year. Operating costs were US$5.5m or 8% down on the previous half year due to the cost savings arising from renegotiation of supply contracts, reduction in the number of expatriate employees and the move to owner mining (from 17 April 2000). The reduction in the depreciation charge arising from the new ore reserve amounted to US$5.0m for the half year. Impairment Provision (IAS 36) Lihir is incorporated in Papua New Guinea and, as such, reports in accordance with International Accounting Standards. Under the accounting standard IAS36, Lihir is obliged to review the carrying values of its assets every six months. In the light of the company's lower gold price assumption, the Directors have deemed it prudent to recognise an impairment of US$231m pre-tax (US$150m after tax). This non-cash provision has been treated as an abnormal item in the profit and loss statement. The impairment was calculated on discounted cash flows to be derived from existing plant and existing reserves. It excludes the value of the hedge book, future conversion or value of resources-not-included-in-reserves and future expansion opportunities. Conservative economic and valuation assumptions have been used to determine the operation's recoverable amount. After the asset impairment provision and a further net realisable value provision of US$11.4m relating to the low grade stockpile material, the overall loss after tax for the six months was US$148.3. First First Half Half 2000 1999 Gold sold - oz 256,649 269,121 Average price realised US$/oz 410 361 US$'M US$'M SALES REVENUE 105.1 97.3 Operating costs (62.6) (68.1) Depreciation and amortisation (22.3) (24.6) Profit before interest, 20.2 4.6 abnormal items and tax (5.8) (14.3) Net interest expense 14.4 (9.7) Profit / (Loss) before (231.0) - abnormal items and tax (11.4) - Abnormal impairment loss (227.9) (9.7) Other abnormal adjustments 79.7 3.1 Profit / (Loss) before tax 148.3 (6.6) Income tax Profit / (Loss) after tax Capital expenditure 56.6 17.6 Cash flow before financing and (43.6) (14.6) hedge sale First First Half Half 2000 1999 Gross cash cost per ounce US$/oz 281 298 - deferred waste adjustment 6 (41) - low grade stockpile (28) (7) adjustment (16) 5 - inventory adjustments - (1) - corporate expenses US$/oz 243 254 TOTAL CASH COST 3. Production and Sales for the Second Quarter and Half Year As noted in the first quarter's report to shareholders, the relining of the bricks in autoclave 2 limited output to 121,301 ounces. Since 18 May all three autoclaves have been functioning normally. Gold poured in the second quarter of 141,551 ounces represented a 17% improvement on the 121,301 ounces achieved in the first quarter. Despite the disruptions, the 600,000 ounce production target for the full year 2000 remains achievable. First Half 2nd Quarter First 2000 2000 Quarter 2000 Mine Ore mined kt 5,184 2,676 2,508 Material moved kt 17,218 8,053 9,165 Processing Ore milled kt 1,632 841 792 Grade g 5.46 5.64 5.27 Au/t Recovery % 91.5 92.7 90.5 Gold poured Oz 262,852 141,551 121,301 Revenue / Costs Gold Sold oz 256,649 131,014 125,635 Average price US$/oz 410 398 421 Total cash US$/oz 243 235 250 cost 4. Reserves and Exploration An updated ore reserve statement was published on 28 June, reflecting a 21% increase in reserves, despite a reduction in the reserve price from $350 oz to $325. The new reserves as of the end of May 2000 were 117.9mt at 3.53 g Au/t for 13.4 moz contained gold. The second quarter drilling programme concentrated on the north Minifie area, providing infill data into the planned Phase 4 north cut, along with additional geotechnical drilling around the south and southeast Minifie limits. In total, 23 holes for 5,547m were completed. Preparations for the US$5m Lienetz drilling programme are in progress and drilling will commence shortly. 5. Finance Negotiations continue on the introduction of the new five year US$50m revolving credit facility. The objective is to extend the tenure of committed facilities from 2003 to 2005 and cover the Lienetz development period during which higher stripping ratios, lower grade and reduced production prevail. 6. Hedging Lihir's unused hedge position as at 30 June 2000 was as set down below. The mark-to-market value was US$69.9m: Forward Put Spot Sales Options Deferreds Total Min. Min. Min. Min. Ounces price Ounces price Ounces price Ounces price Jul - 72,996 313.45 63,985 407.75 564,192 284.57 701,173 298.82 Sep Oct - 77,996 317.31 63,985 409.86 141,981 359.02 Dec 2001 351,380 319.99 154,125 466.23 505,505 364.58 2002 329,611 342.54 150,413 480.33 480,024 385.72 2003 100,000 336.94 100,000 336.94 2004 40,000 335.00 40,000 335.00 2005 40,000 367.70 40,000 335.00 80,000 351.35 2006 40,000 335.00 40,000 335.00 2007 40,000 335.00 40,000 335.00 2008 40,000 335.00 40,000 335.00 971,983 330.64 632,508 416.47 564,192 284.57 2,168,684 343.69 Hedging Policy Lihir is required under the terms of the loan covenants of both the existing and proposed loan facilities to maintain substantial levels of hedging. Beyond 2005, Lihir is likely to have greater freedom of manoeuvre on hedging although it will continue to avoid speculative activity. Lihir's current intention is to adopt a policy of providing a threshold level of protection for earnings while maintaining extensive exposure to upside movements in the gold price. Lihir's policy will necessarily change over time but the company's present view is that it will procure hedge cover for one-third of annual production for the period 2005 onwards on a rolling 12 year time horizon. The corollary is that two-thirds of annual production will remain unhedged. Placement of the additional hedging will be progressive and will be flexed in terms of quantities according to spot gold price trends. 7. New Investment On 25 July the Board approved investment in a power plant and commissioned a feasibility study including detailed engineering for a fourth autoclave to increase production. 8. Other Matters Share Register - The transfer of the ordinary shares that Niugini Mining held in Lihir Gold Limited to Class B shares with limited rights has now been completed. This reduces the number of issued ordinary shares to 1,142,334,215. As a result of the merger with Niugini Mining, the dissolution of Southern Gold (Bahamas) Limited and the divestment of the shares held by Vengold Inc., the ownership structure of the company has been simplified. For further information, please contact: Media Relations Investor Relations Lisa Cullimore Peter Jarvis + 44 (0) 20 7753 2305 + 44 (0) 20 7753 2401 Website: www.riotinto.com Note to Editors Rio Tinto owns 16.3 per cent of Lihir Gold Limited

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