The information in the table below reflects citations and orders MSHA issued to Rio Tinto duringthe year ended December 31, 2010, as reflected in our records. The data in our system may not matchor reconcile with the data MSHA maintains on its public website. In evaluating this information,consideration should also be given to factors such as: (i) the number of citations and orders mayvary depending on the size and operation of the mine, (ii) the number of citations issued may varyfrom inspector to inspector and mine to mine, and (iii) citations and orders may be contested andappealed, and in that process, may be reduced in severity and amount, and may be dismissed.                                       Section                      104(a)                      Significant                      and Section Section 104(d) Section Section Proposed MSHA      Mine ID   Substantial 104(b) Citations and 110(b)(2)  107(a) Assessments (in     Pending LegalNumber (1) Mine or Operating Name Citations (2) Orders (3) Orders (4) Violations (5) Orders (6) thousands) (7) Fatalities  Action (8)4202040 Kennecott Barneys Canyon Mining  —   —   —   —   —   —   —   — 2000420 Kennecott Eagle Land LLC  —   —   —   —   —   —   —   — 4200149 Kennecott Utah Copper LLC (Bingham Canyon)  9   —   1   —   —   14.5   —   4 4201996 Kennecott Utah Copper LLC (Copperton Concentrator)  1   —   —   —   —   20.6   —   — 0400743 US Borax Inc (Boron)  47   —   —   —   —   137.4   —   — 0402834 US Borax Inc (Owens Lake)  0   —   —   —   —   0.1   —   — 0502962 Colowyo Coal Company LP  12   —   —   —   1   67.8   —   2 0200152 Resolution Copper Mining LLC  1   —   —   —   —   0.6   —   — 4102113 Luzenac America (Houston)  1   —   —   —   —   0.2   —   — 4300150 Luzenac America Inc. (Luzenac America)  4   —   —   —   —   2.6   —   — 2400162 Luzenac America Incorporated (Three Folks)  5   —   —   —   —   9.5   —   — 2402050 Luzenac America Incorporated (Sapppington)  1   —   —   —   —   0.2   —   1 2400163 Luzenac America Incorporated (Yellowstone)  1                   1.9       1  (1) MSHA assigns an identification number to each mine or operation and may or may not assignseparate identification numbers to related facilities. The information provided in this tableis presented by mine identification number. Additionally, because Rio Tinto no longermaintains ownership or operational control of entities it has divested, the MSHA ID numbersfrom any divested entity of Rio Tinto, including but not limited to Cloud Peak Energy LLC, arenot included. (2) Represents the total number of citations issued by MSHA for violation of health or safetystandards that could significantly and substantially contribute to a serious injury if leftunabated. (3) Represents the total number of orders issued, which represents a failure to abate a citationunder section 104(a) within the period prescribed by MSHA. This results in an order ofimmediate withdrawal from the area of the mine affected by the condition until MSHA determinesthat the violation has been abated. (4) Represents the total number of citations and orders issued by MSHA for unwarrantable failureto comply with mandatory health or safety standards. (5) Represents the total number of flagrant violations identified. (6) Represents the total number of imminent danger orders issued under section 107(a) of the MineAct. (7) Amounts represent the total dollar value of proposed assessments received from MSHA and donot necessarily relate to the citations or orders issued by MSHA during the period, or to thepending legal actions reported below. (8) Pending legal actions before the Federal Mine Safety and Health Review Commission (the“Commission”) as required to be reported by Section 1503(a)(3)of the Act. These casesmay involve, among other questions, challenges by operators to citations, orders and penaltiesthey have received from MSHA or complaints of discrimination by miners under Section 105 ofthe Mine Act. The following provides additional information of the types of proceedings thatmay be brought before the Commission: **•** Contest Proceedings — a contest proceeding may be filed with the Commission by anoperator to challenge the issuance of a citation or order issued by MSHA;  **•** Civil Penalty Proceedings — a civil penalty proceeding may be filed with the Commissionby an operator to challenge a civil penalty MSHA has proposed for a violation contained ina citation or order; **•** Discrimination Proceedings — a discrimination proceeding involves a miner’s allegationthat he or she has suffered adverse employment action because he or she engaged in activityprotected under the Mine Act, such as making a safety complaint;  **•** Temporary Reinstatement Proceedings — a temporary reinstatement proceeding involvescases in which a miner has filed a complaint with MSHA stating that he or she has suffereddiscrimination and the miner has lost his or her position; and  **•** Compensation Proceedings — a compensation proceeding may be filed with the Commissionby miners entitled to compensation when a mine is closed by certain closure orders issuedby MSHA. The purpose of the proceeding is to determine the amount of compensation, if any,due to miners idled by the orders.