McEwen Mining Inc. (49%) and Hochschild Mining Argentina (51%)
Internal classification using, as reference, the CDA guidelines on Consequence Classification Ratings

McEwen Mining Inc (49 % Interest), Hochschild Mining (51% Interest, Mine Operator)

"ANCOLD (2012) Guidelines on the Consequence
Categories for Dams"

ANCOLD (2012a, b) (Australian National Committee On Large Dams)

Coeur Gold New Zealand Limited & Coeur Gold New Zealand II, LLC
New Zealand Building Act, Resource
Management Act, Health and Safety at Work Act.

Kirkland Lake Gold, Fosterville Gold Mine
DPI Environmental Guidelines - Management
of Tailings Storage
Facilities (Nov 2004)
ANCOLD - Guidelines on
Tailings Dams: planning,
design, construction,
operation and closure
(2003)

West Cliff Emplacement Area (Stages 1 - 4)

Anglo American;Inversiones Mineras Becrux SpA (Codelco/Mitsui);Mitsubishi
Anglo American Technical Standard (AA TS 602 001)

south32 corp, Sojitz Alumina Pty Ltd, japan Alumina Accosiate (aus) ltd,

70%OCAL (subsidiary of Glencore), Marubeni Coal Pty Ltd (17%), OCAL Macquarie Pty Ltd (10%) and JFE Minerals (Australia) Pty Ltd (3%)

Internal – based on Canadian Dam Association Guidelines

DMIRS recommended codes of practice Guidelines on Tailings Dams – Planning, Design, Construction, Operation and Closure (Ancold May 2012)

United Collieries [95% Glencore Coal Pty. Ltd. and 5% Construction, Forestry, Mining and Energy Union (CFMEU)]

Mt Arthur Tailings Storage Facility - Stage 1

JX Nippon Mining & Metals Corporation, Mitsubishi Materials Corporation, Mitsubishi Corporation and Marubeni Corporation.
Antofagasta Minerals’ Risk Evaluation Guideline, which is based on the ISO 31000 risk management standard.

Facility is classified under both the DMP, 2013 and ANCOLD,
2012 guidelines and standards

Glencore International AG (73.1%) and First Quantum Minerals Ltd (16.9%)) and ZCCM-IH (10%)
Southern Tailings Storage Facility (South Embankment)

Mineral Resources Limited, Jiangxi Ganfeng Lithium Co., Ltd

Kalgoorlie Consolidated Gold Mines Pty Ltd
Barrick Australia Pacific and Newmont Australia
ANCOLD (2012a, b) (Australian National Committee On Large Dams)

Kalgoorlie Consolidated Gold Mines Pty Ltd
Barrick Australia Pacific and Newmont Australia

Kalgoorlie Consolidated Gold Mines Pty Ltd
Barrick Australia Pacific and Newmont Australia
Uncertain

DEAT guideline document on EIA Regulations (April 1998)

Anglo American Technical Standard (AA TS 602 001)

South African Code of Practice for Mine Residue SANS 0286 (1998)

Liqhobong Mining Development Company (PTY) Ltd Reg. No I96/97- A subsidiary of Firestone Diamonds PLC.

SANS 10862, Code Of Practice for Mine Residue (1998)

Anglo American, Namdeb Diamond Corporation, De Beers, De Beers; Government of the Republic of Namibia
Anglo American Technical Standard (AA TS 602 001)

Anglo American Plc; Industrial Development Corp. of South Africa Ltd; Public Investment Corporation (SOC); Blackrock Investment Management; RMB Morgan Stanley * as at 15 March 2019

Sibanye Gold Limited (trading as Sibanye-Stillwater)

Sociedad Contractual Minera Lumina Copper Chile.
JX Nippon / Mitsui Mining and Smelting Co.
“Decreto Supremo N°
248” by Ministry of
Mining in Chile.

Sociedad Contractual Minera Lumina Copper Chile.
JX Nippon / Mitsui Mining and Smelting Co.
“Decreto Supremo N° 248” by Ministry of Mining in Chile.

Anglo American Plc; Industrial Development Corp. of South Africa Ltd; Public Investment Corporation (SOC); Blackrock Investment Management; RMB Morgan Stanley * as at 15 March 2019
Sishen Mine Dormant Tailings Storage Facility 2

Anglo American Plc; Industrial Development Corp. of South Africa Ltd; Public Investment Corporation (SOC); Blackrock Investment Management; RMB Morgan Stanley * as at 15 March 2019
Sishen Mine Dormant Tailings Storage Facility 1 (near pit)

Sishen Mine (DMS Dams 1 to 4 and JIG
infill Legs 1 to 4)

Chile: SERNAGEOMIN DS 248/2007 and DGA Decreto 50 (2015)

Ojos del Salado Tailings Facility - South

Ojos del Salado Tailings Facility – Central

Ojos del Salado Tailings Facility – North

Xstrata Copper 50% and mana g, p ; er, Goldcorp 37.5%; and Yamana Gold 12.5%

Nchwaning II New Tailings Storage Facility

Nchwaning II existing Tailings Storage
Facility

External Service Provider appointed by SSO
section 123(1) of the National Water Act of 2003

External Service Provider appointed by SSO
section 123(1) of the National Water Act of 2002

External Service Provider appointed by SSO
section 123(1) of the National Water Act of 2001

Rand Uranium Proprietary Limited (Rand Uranium)

ARM holds an effective 26% in GGV, Glencore Operations South Africa (GOSA) owns the remaining 74%

ARM holds an effective 20.2% in PCB, Glencore Operations South Africa (GOSA) owns remaining 79.8%

Blaauwkrantz Co‐ disposal (North ext. and old combined)

Nkomati Joint Venture ARM, Norilsk Nickel Africa (Pty) Ltd
ARM owns 50% of Nkomati Mine, Norilsk Nickel Africa (Pty) Ltd owns the remaining 50%

Rustenburg Platinum Mines (Pty) Ltd; Sibanye‐Stillwater Kroondal Operations (Pty) Ltd

Sibanye Rustenburg Platinum Mines Pty Ltd

SANS 10286
largely unregulated in 1967. Rudimentary guidance was available on tailings storage construction in South Africa which was based on research, internal document by the Chamber of Mines issued in
1959

Lydenburg Smelter (Furnace Slimes - Dam 11)

Anglo American; Public Investment Corporation; Other shareholders

Rio Tinto (80%), State of Madagascar (20%)

Thorncliffe TSF (North Tailings Disposal Dam)

ARM owns 54% of Two Rivers Mine, Impala Platinum Holdings Ltd owns the remaining 46%

41.5% ARM Mining Consortium, 8.5% is held by local communities and 50% Anglo American Platinum Ltd

Anglo American, Debswana Diamond Company, De Beers, Government of Botswana; De Beers Group of Companies

Anglo Coal (Dawson) Ltd;Mitsui Moura Investment Pty Ltd
Queensland ‐ Dept. of Env & Science/ Anglo American Technical Standard (AA TS 602 001)

73% Implats, 9% Mmakau Mining, 9% Tubatse Platinum,
9% Marula Community Trust

73% Implats, 9% Mmakau Mining, 9% Tubatse Platinum, 9% Marula Community Trust

Barrick Gold Corporation(50%), Antofagosta Plc (50%)

BHP-Billiton (57.5%), Rio Tinto (30%), JECO Corporation (10%), International Finance Corporation (2.5%)

Rustenburg Platinum Mines (Pty) Ltd, Atlatsa Resources Corporation

Antofagasta Minerals’ Risk Evaluation Guideline, which is based on the ISO 31000 risk management standard.

Anglo American; Public Investment Corporation; Other shareholders
Local regulations (SANS 10286:1998) and
Anglo American Technical Standard (AA TS No 602 001)

BHP Mitsubishi Alliance (BMA) and BHP Mitsui Coal (BMC)

Jellinbah Group, Marubeni Coal, Sojitz Coal, and AMCI
Queensland Department of Environment and Science ‐ Manual for assessing consequence categories and hydraulic performance of structures

Rio Tinto (50%), Hancock Prospecting (50%)

Glencore (55%), Sumisho Coal Australia P/L (25%), Itochu Coal Resources Australia P/L (10%) and ICRA OC P/L (10%).

Anglo Coal (German Creek) Pty Ltd Jena Pty Ltd Mitsui German Creek Investment Pty Ltd
Anglo Coal (Capcoal
Management ) Pty Ltd
Queensland ‐ Dept. of Env & Science/ Anglo American Technical Standard (AA TS 602 001)

The Oaks Pase & Tailings (Coarse) Co‐ disposal Residue Paddocks

KGHM / SUMITOMO METAL MINING / SUMITOMO CORPORATION
Tailing Storage Facilities Sierra Gorda SCM
Chilean regulations don't have guidelines for this under their classification system.

wholly-owned subsidiary of Puna Operations Inc.
Mina Pirquitas S.A. – Pirquitas Tailings Dam
Canadian Dam Association Consequence Classification Ratings for Dams

wholly-owned subsidiary of Puna Operations Inc.
Canadian Dam Association Consequence Classification Ratings for Dam

Moranbah North Coal Pty Ltd Moranbah North Coal (No 2) Pty Ltd Mitsui Moranbah North Investment Pty Ltd JFEMA Moranbah North Pty Ltd NS Moranbah North Pty Ltd NS Coal (Moranbah North) Pty Ltd NS Moranbah North Pty Ltd Shinsho Moranbah Coal Pty Ltd
Anglo Coal (Moranbah
North Management)
Pty Limite
Moranbah North Mine ‐ Co-Disposal Area / CDA
Queensland ‐ Dept. of Env & Science/ Anglo American Technical Standard (AA TS 602 001)

Rio Tinto Group (53%), Mitsui (33%), Nippon Steel (14%)

NSSMC (8.0%), Marubeni (6.67%) and Sumitomo (3.33%).

Anglo American, Debswana Diamond Company, De Beers, Government of Botswana; De Beers Group of Companies
Orapa Plant 1 Old Slimes dams (A, B, C, D paddocks)

FMG Iron Bridge, Formosa Steel IB, Baosteel
ANCOLD (2012a, b) (Australian National Committee On Large Dams)

Brazilian Mining Agency guidelines to classify its dams on the basis of both Risk Classification "CRI" and Associated Potential Damage "DPA".

Supreme Decree # 248, issued by the sectoral authority (Sernageomin D.S. # 248)

44%-owned by Xstrata plc in joint venture with Anglo American (44%) and a Japanese consortium (12%) comprising Japan Collahuasi Resources BV, Mitsui & Co. Ltd., Nippon Mining & Metals Co. Ltd. and Mitsui Mining & Smelting Co. Ltd.
Collahuasi Pampa Pabellón TFS (TSF Embankment)

Blanket Mine is a Subsidiary of Caledonia Mining Corporation
technical operating risk assessment system (TORAS)

Glencore International AG (73.1%) and First Quantum Minerals Ltd (16.9%)) and ZCCM-IH (10%)
TD 7/8, TD 8, Kennedy's Wall, Saddle Dam 1,4, Saddle Dam 3, TD 7W

Glencore International AG (73.1%) and First Quantum Minerals Ltd (16.9%)) and ZCCM-IH (10%)

Ordinance
70.389/17 - ANM (Mining National Agency), Brazil

Ordinance
70.389/17 - ANM (Mining National Agency),

Anglo Gold Ashanti Corrego do Sitio Mineracao

Specific Mozambican law - Decreto 50 -
2017

Canadian Dam Association Consequence Classification Ratings for Dams

Internal classification using, as reference, the CDA guidelines on Consequence Classification Ratings

Ordinance No. 70.389, May, 17th, 2017 from DNPM (now ANM - National Mining Agency of Brazil)

Rockfill Dam, Single Lift (Segmented Ring Dyke)
Ordinance No. 70.389, May, 17th, 2017 from DNPM (now ANM - National Mining Agency of Brazil)

Mineracao Maraca Industria e Comercio S.A.

Brazil: Tailings Dam Classification System - Departamento Nacional de Produção Mineral (DNPM) Portaria No 70.389 (May 17, 2017)

National Dams Security Policy: law No 12.334/2010.

MMG (62.5%), a wholly owned subsidiary of Guoxin International Investment Co. Ltd (22.5%) and CITIC Metal Co. Ltd (15.0%).
"ANCOLD (2012) Guidelines on the Consequence
Categories for Dams"

Rio Tinto (68.39%), shareholders in the publicly listed Energy Resources of Australia Ltd (31.61%)

Australian National Committee on Large Dams (ANCOLD)

The Northern Ponds were rehabilitated and relinquished in the 1980s, however further rehabilitation activities will be incorporated as part of Gove closure. Part of the Northern Ponds is now outside of current Rio Tinto tenure and rehabilitation activities will involve third party tenure holders.

Glencore 55.03% of Volcan's Class A shares

Glencore 55.03% of Volcan's Class A shares
Vinchos TSF's, (Vinchos 1, 2A, 2B, 3, 4, 6 and 7)

Compania Minera Santa Luisa S.A. ,a subsidiary of Mitsui
Mining & Smelting Co., Ltd.
"Guía Ambiental para la Estabilidad de Taludes de Depósitos
de Residuos Sólidos Provenientes de Actividades Mineras” by
Ministry of Energy and Mines in Peru(DGAA, Vol. XVI –1998)

Xstrata plc (33.75%), BHP Billiton (33.75%), TeckCominco Ltd. (22.5%) and Mitsubishi Corp. (10.0%)

JV with COMPANIA MINERA ANTAMINA S.A. (BHP, Glencore, Mitsubishi, Teck)

Newmont Mining Corp. (51.35%); Minas Buenaventura (43.65%); International Finance Corp (5%)

UN Economic Commission for Europe–Safety Guidelines and Good Practices 2012

UN Economic Commission for Europe–Safety Guidelines and Good Practices 2013

Brazilian Law Portaria 70.389 from the Brazilian National Mining Agency

South Africa Code of Practice for Mine Residue Deposits (SANS 10286)

Internal – based on Canadian Dam Association (2013):
Hazard Category of High according to SEMA No 132 Regulation.

Internal – based on Canadian Dam
Association Guidelines

Internal – based on Canadian Dam Association (2013): Hazard Category of High according to SEMA No 132 Regulation.

Rio Tinto (12%), Companhia Brasileira de Aluminio (10%), Vale (40%), South32 ( (5%). Alcoa Aluminio S.A. (8.58%), AWA Brasil (4.62%), and AWA LLC (5%).
Ordinance
70.389/17 - ANM (Mining National Agency), Brazil

Rio Tinto (12%), Companhia Brasileira de Aluminio (10%), Vale (40%), South32 ( (5%). Alcoa Aluminio S.A. (8.58%), AWA Brasil (4.62%), and AWA LLC (5%).

Rio Tinto (12%), Companhia Brasileira de Alumínio (10%), Vale (40%), South32 ( (5%). Alcoa Aluminio S.A. (8.58%), AWA Brasil (4.62%), and AWA LLC (5%).

Vale (40%), South32 (14.8%), Rio Tinto (12%), Companhia Brasileira de Aluminio (10%), Norsk Hydro (5%), Alcoa (18.2%)
ANM/DNPM Ordinance nº 70.389:
The classification is done by the independent auditor.

French Decree N°2007-1735 of 11/12/2007 « relatif à la sécurité des ouvrages hydrauliques et au comité
technique permanent des barrages et des ouvrages hydrauliques et modifiant le code de l’environnement »

Minera ao Aurizona S.A. which is a wholly-owned subsidiary of Equinox Gold

Regulation of Directorate General of Water Resources Appendices No : 108/KPTS/A/1998

PT Nusa Halmahera Minerals (75% Newcrest)

Barrick Gold Corporation (45%), AngloGold (45%), Societe Miniere de Kilo-Moto (SOKIMO) (10%)
South Africa Code of Practice for Mine Residue Deposits (SANS 10286)

IAMGOLD 95% and Republic of Suriname 5%.

Ghana Minerals
& Mining
(Health, Safety
& Technical
Regulations

Gold Fields Ghana Holdings (71.1%), IAMGOLD (18.9%) and the Ghanaian Government (10%)
Ghana Minerals and Mining Law 1986 and Guidelines on Ghana's Mining Environmental Regulations, Final Draft 1994

Gold Fields Ghana Holdings (71.1%), IAMGOLD (18.9%) and the Ghanaian Government (10%)

Perseus 90% 10% the Ghanaian government.
Hazard Class B/C (GMMR
2012) and High A (ANCOLD)
Ghana Minerals and Mining Regulations 2012
ANCOLD

Australian National Committee on Large Dams (ANCOLD 2012) Guidelines.

AngloGold Ashanti, African Underground Mining Services (AUMS), Rocksure International
Ghana Minerals
& Mining (Health, Safety & Technical Regulations 2012) MINCOM LI 1282

Kinross Gold Corporation. The Government of Ghana 10%

Asanko and Gold Fields both 45% the Government of Ghana 10%.

Perseus 90% 10% the government of Côte d’Ivoire

Canadian Dam Association (CDA) Regulation 2013

Sumitomo Metal Mining Co., Ltd., Mitsui & Co., Ltd., Sojitz Corporation, Nickel Asia Corporation
Sumitomo Metal Mining Co., Ltd. / Mitsui & Co., Ltd. / Sojitz Corporation / Nickel Asia Corporation

Sumitomo Metal Mining Co., Nickel Asia Corporation, Mitsui & Co.
Sumitomo Metal Mining Co. / Nickel Asia Corporation / Mitsui & Co.
Taganito HPAL Nickel Corporation No.1 TSF

Barrick Gold Corporation (89.7%) the State of Cote d’lvoire 10%, Ivorian investors (0.3%)
South Africa Code of Practice for Mine Residue Deposits (SANS 10286)

Perseus owns a 86%, 4% Société Minière de Côte d'Ivoire SARL (SOMICI) and 10% the government of Côte d’Ivoire

Canadian Dam Association (CDA) Consequence Classification Ratings for Dams

BHP (33.3 %), Glencore (33.3 %), Anglo American plc (33.3 %)

Hummingbird resources owns 85% of Glencar Mali SARL (Glencar) and Société Malienne de la Petite Mine, a
private Malian company, owns 5%. The government of Mali owns 10%
Canadian Dam Association, Technical Bulletin: Application of Dam Safety Guidelines to Mining Dams and the South African National Standards, SANS 10286: Code of Practice - Mine Residue, 1998.

AngloGold Ashanti 85% 15% government of Guinea

Barrick Gold Corporation (40%); AngloGold Ashanti (40%), and the State of Mali (20%).

Barrick (80%), and the State of Mali (20%).

AngloGold Ashanti and IAMGOLD, gov of mali

IAMGOLD 90% and Government of Burkina Faso 10%

Cuzcatlan Dry Stack San Jose Mine (Oaxaca, México)
Canadian Dam Association Consequence Classification Ratings for Dams

Cuzcatlan Tailings Dam San Jose Mine (Oaxaca, México)

Downstream Consequence of Failure Classification Interpretation Guideline, Ministry of Forests, Lands and Natural Resource Operations, BRITISH COLUMBIA (2011).

Barrick Gold Corporation (60%) and Newmont Corporation (40%)

Failure analysis and effect analysis (FEMA).

ANCOLD (2012)
Guidelines 7. Consequence
Category

TSF Safety Management Regulations, China/CDA Guidelines

TSF Safety Management Regulations, China/CDA
Guidelines

Minera Saucito, S. A. de C. V. Unidad Saucito.
Fresnillo plc.
Classification of the risk according to the risk (US Army Corps of Engineers), mass movement by failure.

Minera Fresnillo. S. A. de C. V. Unidad Fresnillo.
Fresnillo plc
Classification of the risk according to the risk (US Army Corps of Engineers), mass movement by failure.

Minera Mexicana de Sombrerete. Proyecto Tocayos.
Failure analysis and effect analysis (FEMA).

Ma’aden Barrick Copper Company Limited (Saudi Arabia)
Barrick Gold Corporation (50%), Ma’aden Saudi Arabian Mining co. (50%)
Australian National Committee on Large Dams (ANCOLD)

Tailings Management Facility #1 (TMF #1)
Canadian Dam Association Dam Safety Guidelines (CDA, 2013)

Tailings Management Facility #2 (TMF #2)
Canadian Dam Association (CDA, 2014). Technical Bulletin: Application of Dam Safety Guidelines to Mining Dams.

Sukari South Tailings Storage Facility (TSF 1)

Minera Mexicana La Cienega, S. A. de C. V. Unidad La Cienega.
Fresnillo plc.

Minera San Julian, S. A. de C. V. Unidad San Julian.
Fresnillo plc.

Canadian Dam Association Dam Safety
Guidelines.

DMP (2013) / Taillngs storage practice in western australia

Minera Penmont, S. A. de C. V. Unidad La Herradura.
Failure analysis and effect analysis (FEMA).

Mitsui Kushikino Mining Co., Ltd. ,a subsidiary of Mitsui
Mining & Smelting Co., Ltd.
Ministry of Economy, Trade, and Industry(2012)
"Technical Policies of the ministerial decree defining technical standards of mining facilities"

New Mexico Administrative Code (NMAC 19-25-12)

Canadian Dam Association/Arizona Department of Environmental Quality

We follow the Japanese law (design standard).

We follow the Japanese law (design standard) as minimum requirement, and apply more strict internal rules, as Safety Judgement

TSF Safety Management
Regulations, China/CDA Guidelines

South Carolina Department of Health and Environmental Control - Dam Safety

California Department of Water Resources Division of Safety of Dams

Ministry of Economy, Trade, and Industry(2012)
"Technical Policies of the ministerial decree defining technical standards of mining facilities"

New Mexico Office of the State Engineer (OSE NM)

Canadian Dam Association/New Mexico Office of the State Engineer

California Department of Safety of Dams (DSOD CA)

Nakatatsu Kougyou Co., Ltd. , a subsidiary of Mitsui Mining &
Smelting Co., Ltd.
Ministry of Economy, Trade, and Industry(2012)
"Technical Policies of the ministerial decree defining technical standards of mining facilities"

Nakatatsu Kougyou Co., Ltd. , a subsidiary of Mitsui Mining &
Smelting Co., Ltd.
Ministry of Economy, Trade, and Industry(2012) "Technical Policies of the ministerial decree defining technical standards of mining facilities"

Kirkland Lake Gold, Fosterville Gold Mine
DPI EnvironmentalGuidelines - Management
of Tailings Storage
Facilities (Nov 2004)

Kirkland Lake Gold, Fosterville Gold Mine
DPI Environmental
Guidelines - Management of Tailings Storage Facilities (Nov 2004) ANCOLD - Guidelines on Tailings Dams: planning, design, construction, operation and closure (May 2012)

Nevada Department of Water Resources (DWR NV)

Portugal: Decreto_Lei no. 344/2007, amended by Decreto_Lei no. 21/2018, which establishes the Regulamento de Segurança de Barragens (RSB)

Sand Dam - Property owned by California State Parkes.

Nevada Division of Water Resources, Dam Safety Branch per Nevada Administrative Code 535.140 (http://water.nv.gov/DamGuidelinesHazard.aspx )

State of Nevada Division of Water Resources Hazard Designation

Alacer Gold Madencilik A.S. 80% Lidya Madencilik Sanayi ve Ticaret A.Ş 20%
Canadian Dam Association Safety guidelines (Table 2-1, Dam Safety Guidelines, 2007, 2013 Edition)

State of Nevada Division of Water Resources

Barrick Gold Corporation (61.5%) and Newmont Corporation (38.5%)
Nevada Department of Water Resources (DWR NV)

Utah Department of Natural Resources (DNR UT)

Utah Administrative Code R655-10-1 et seq rules for dam safety hazard classifications

Marigold Mine TSF – inactive, on-land facility with one crescent dam

Canadian Dam Association Consequence Classification Ratings for Dam

International Building Code (IBC) 3.04-01-
2005

Wyoming state/national criteria:
Safety of dams is administered through the Office of the State Engineer. Reservoirs (dams) are governed by WS-41-3-307 to WS-41-3-318. State Engineer's Office (SEO's) Safety of Dams Program and the State of Wyoming's Agreement State Program (Uranium Recovery Program (URP)) have criteria for impoundments and the hazards posed by the Sweetwater Tailings Storage Facility Would be characterized as low.

Canadian Dam Association Dam Safety Guidelines (CDA, 2013)

Not owned or operated, but Rio Tinto retain oversight as former operator

Turquoise Hill Resources (66%, of which Rio Tinto owns 51%), Erdenes Oyu Tolgoi - Mongolian State owned (34%)

Rio Tinto retains oversight as former operator
Conseil Departemental des Bouches du Rhone (regional council)

South Dakota Department of Energy and Natural Resources (DENR SD)

Glencore (Rio Tinto and Glencore jointly perform response actions in accordance with governmental orders and agreements)

Noranda Income Fund, Glencore Canada and CEZinc

Federal Guidelines for Dam Safety - Federal
Emergency Management Agency (FEMA)

Montana Department of Environmental Quality (DEQ MT)

Canadian Dam Association/MNR Ontario Dam Safety Guidelines

Montana Department of Natural Resources and Conservation, Dam Safety Section

Mine 12 Tailings Impoundment East Dam E1, E2,E3, North Dam west dam and south dam

Mine 12 Tailings Impoundment East Dam E2

ArcelorMittal, Cliffs Natural Resources and US Steel Canada.

Ontario Ministry of Natural Resources Classification and Inflow Design Criteria (2011)

Tailings Impoundment Area -7 South Saddle Dam
Ontario Ministry of Natural Resources Classification and Inflow Design Criteria (2011)

Macassa TSF (Upper Dam B, Lower Dam B, Upper Dam E, Lower Dam E, Dam F, Dam G)

Noranda 5 Polishing Pond (South, North-East and West Dyke)

Zhairem Slurry settler, Lead Gravity concentrator

Waite Amulet TSF (Acid rock drainage water pond) (Principal Dike)

Tailings Management Area (TMA), Perimeter Dyke, Corckys Pond, Pond A-C

Tailings Storage Facility 3 (Tailings Dam 3)

Tailings Storage Facility 2 (Tailings Dam 2)

Tailings Storage Facility 1 (Tailings Dam 1)

The hazard category is determined by a general design
body: the Ukrainian State Research and Design & Research
Institute "UKRNYVODOKANALPROEKT", regulatory
document: DBN V.1.2-14-2018 General principles of
ensuring the reliability and constructive safety of buildings
and structures; DBN V.2.4-3:2010- HYDRAULIC
STRUCTURES. FUNDAMENTAL PROVISIONS; LAW OF
UKRAINE On amendments to some legislative acts of
Ukraine on improvement of urban development DSTU-N B
V.1.2-16:2013 Determination of consequence class of
buildings and structures

Geco Tailings Facility (CN1, CN2 , CP, CP3, E1-E3)

BC Health, Safety and Reclamation Code for Mines 2017 (code references CDA Guidelines)

Canadian Dam Association/Quebec Dam Safety Regulations

East Gypsum Dike, West Gypsum Dike, Gypsum Divider Dike, NorthEast Gypsum Dike
BC Health, Safety and Reclamation Code for Mines 2017 (code references CDA Guidelines)

Siliceous No. 1 Dike, Siliceous No. 2 Dike, Siliceous No. 3 Dike
BC Health, Safety and Reclamation Code for Mines 2017 (code references CDA Guidelines)

Central Pond, (Lalanne Dyke and Central Dyke)

Nippon Steel & Sumitomo Metal Corporation

Canadian Dam Association / Ministry of Natural Resources and Forestry

Kazakhstan safe operations rules for
tailings/slurry storage facilities at hazardous production sites, 2014

Fording River 2 Pit - 3 Pit Tailings Disposal Area

Rio Tinto (58.7%), Mitsubishi (26.2%), Labrador Iron Ore Royalty Income Corporation (15.1%)

Fording River Turnbull Pit South Tailings Storage Facility

Federal Law “On industrial waste” as of 24.06.1998 No. 89-FZ (with amendments).
Federal Law “On protection of the environment” as of 10.01.2002 No. 7-FZ (with amendments).

K2; Dykes, Ponds: Phase I, Phase II, Phase III, Phase IV, Phase V.

Act on mine tailings, DECREE OF THE MINISTER OF THE ENVIRONMENT dated 20 April 2007 on the technical conditions for hydrotechnical facilities and their siting, Building Law, ISO 31010

Boss Tailings Storage Facility (Main Dam)

Boss Tailings Storage Facility North Tailings Berm

Tailings storage facility for the Asacha Gold MineRegistered number: 18-18(01)0021-19-ГОР
All hazard ratings are within exclusive remit of Rostekhnadzor, which is governed by the governmental Decree #10(04.02.2002)«On the Approval of the“Instructions on Waterworks and Liquid Industrial Waste Storage Ponds Safety Criteria Determination and Hazard Rating» and the Federal Law« On Waterworks Safety»

Orken LLP Iron ore Division, ArcelorMittal Temirtau
Orken LLP Iron ore Division/ ArcelorMittal Temirtau

European Directive 2006/21/EC - Directive on the management of waste from extractive
industries.

Anglo American Technical Standard (AA TS 602 001); Canadian Dam Safety Association Dam Safety Guidelines (CDA, 2013,2014);Canadian Dam Safety Association Dam Safety Guidelines (CDA, 2013,2014)

Victor Coarse PK & Lo rade Ore Stockpile

Russian State Regulation No 986 of 2.11.2013

"Directive
2006/21/EC of the European Parliament
and of the
Council of 15
March 2006 on the management of waste from extractive industries."

Classification criteria for hydraulic structures (Decree № 986, 02.11.2013, Government of Russian Federation)

Joint Venture: Centerra
(75%, Operator), Sojitz (25%)

TECK COMINCO (61%), BHP BILLITON (29%), and NISSHO-IWAI (CANADA) (10%)

Seabee Mine, East Lake TSF – 3 concrete perimeter dams

East Lake TSF – 3 concrete perimeter dams
Canadian Dam Association Consequence Classification Ratings for Dam

Seabee Mine, Triangle Lake TSF – 2 dams and 2 saddle dikes

Triangle Lake TSF – 2 dams and 2 saddle dikes

Owned: Joint Venture through the Fort Hills Energy LP - Suncor Energy Inc., Teck Resources Ltd., Total
Operated by: Suncor Energy Inc.
Fort Hills Out of Pit Tailings Area (OPTA)
Facility Dams:
West Tailings Dyke, West Overburden Dyke, South Dyke, East Dyke, North East Dyke, North Dyke. (Canada)
Dam Classification is based on the Alberta Dam and Canal Safety Directive (regulation) (equivalent to CDA)

Total SA Joint Venture through the Fort Hills Energy LP - Suncor Energy Inc., Teck
Alberta Dam and Canal Safety Directive (regulation)

Newcrest Red Chris Mining Limited (70% Newcrest), Imperial Metals Ltd. (30%)
Newcrest Red Chris Mining Limited (70% Newcrest)

The current methods of Federal Service for Supervision of Natural Resource Usage
(Rosprirodnadzor)

Sweden: GruvRIDAS Dam Class (2012) and Environmental Code Dam Safety Class “Dammsäkerhetsklass” (DSK) (2016)

Russian state categorisation of hydro technical facilities: I to IV hazard classes (as determined by the State Order on the Classification of Hydro Technical Facilities №986 adopted on 2 November 2013). Hazard class I – extremely high risk; Hazard class II – high risk; Hazard class III – middle risk; Hazard class IV – low risk.

The Swedish
national system from the Swedish environmental law and earlier a consequence
class according to the Swedish Mining industry´s (SVEmin) dam safety guideline (GruvRIDAS). The dam safety class
is approved by the Swedish authorities.

Directive
2006/21/EC of the European Parliament and of the Council of 15
March 2006 on the management of waste from extractive industries. According to the Finnish dam classifications. The Finnish Dam Safety Guide (ELY Centres,
2012). Class is set by the authorities.

Anglo American Technical Standard (AA TS 602 001); CDA; MAC

Rio Tinto (60%), Dominion Diamond Mines (40%)

Directive
2006/21/EC of the European Parliament and of the Council of
15 March 2006 on the management of waste from extractive industries.
The Swedish national system from the Swedish environmental law and earlier a consequence
class according to the Swedish Mining industry´s (SVEmin) dam safety guideline (GruvRIDAS). The dam safety class
is approved by the Swedish authorities.

Sectioned tailings pond at processing plant No.16, stage1
EMERCOM classification, Order No.105 issued by the Russian Ministry of Emergency Situationson 28February2003

EMERCOM classification, Order No.105 issued by the Russian Ministry of Emergency Situationson 28February2003

Directive
2006/21/EC of the European Parliament and of the Council of 15
March 2006 on the management of waste from extractive industries.
The Swedish national system from the Swedish environmental law and earlier a consequence class according to the Swedish Mining industry´s (SVEmin) dam safety guideline (GruvRIDAS). The dam safety class is approved by the Swedish
authorities.

"Directive
2006/21/EC of the European Parliament and of the Council of 15
March 2006 on the management of waste from extractive industries.
The Swedish national system from the Swedish environmental law and earlier a consequence class according to the Swedish Mining industry´s (SVEmin) dam safety guideline (GruvRIDAS). The dam safety class is approved by the Swedish
authorities."

Tailings pond with recycled water fed to the processing plant
EMERCOM classification, Order No.105 issued by the Russian Ministry of Emergency Situationson 28February2003

Tailings pond at processing plant No.3, stage3
Custody of Ministry of ecology, nature management and forestry of the Republic of Sakha (Yakutia) No.18/04/1-01-25-10114

Tailings pond at processing plant No.8, stage1:Tailings dam and secondary dykes

Tailings pond at the Pravy Kieng stream,processing plant No.12 (stage2),Udachny GOK,ALROSA

Hydraulic structures of the tailings pond at the Novy stream, Udachny Division, ALROSA

Directive 2006/21/EC
of the European Parliament and of the Council of 15 March
2006 on the management of waste from extractive industries.
The Swedish national system from the Swedish
environmental law and earlier a consequence class according to the Swedish Mining industry´s (SVEmin) dam safety guideline (GruvRIDAS). The dam safety class is
approved by the
Swedish authorities.

Swedish environmental code MB(1998:808) 11 kap. § 24 -25.

Decree of the Russian Government dd. 02.11.2013 No. 986 “On Classification of Hydraulic Structures”

"Directive
March 2006 on the management of waste from extractive industries. According to the Finnish dam classifications. The Finnish Dam Safety Guide (ELY Centres,
2012). Class is set by the authorities."

CDA
(Alaska Department Natural Resources Dam Safety Guidelines)