tailing storage facilities under the direct and indirect ......catalina huanca, peru 2.1 ramahuayco...

Tailing Storage Facilities Under the Direct and Indirect Management of Trafigura

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TAILING STORAGE FACILITIES UNDER THE

DIRECT AND INDIRECT MANAGEMENT OF TRAFIGURA


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Introduction

Trafigura’s Mining Group manages a portfolio of mines in Europe, Africa, North America and Latin America, ranging from wholly owned facilities to joint ventures and minority investments.

The Mining Group has a decentralised management model, whereby mine sites typically operate independently, albeit aligned to a single management system and working under and reporting against a set of overarching policies, principles and guidelines, such as those that relate to Tailings Storage Facilities (TSFs). These policies include, for example, Trafigura’s Code of Business Conduct, Corporate Responsibility Policy and HSEC Business Principles which are mandatory for all Trafigura Group companies.

The Mining Group requires all sites to participate in the Trafigura Group HSEC Assurance Programme and all TSFs undergo an annual audit by an internationally reputed third-party. As part of this process, the safety factor of each TSF is estimated and the impact of a potential failure is evaluated through numerical simulations.

TSFs must have real time monitoring including wall displacement measurement, piezometers and inclinometers.

A training programme is in place for TSF managers and operators, provided by internationally experts.

On the basis that the integrity of TSFs has become a matter of material concern for Trafigura’s stakeholders and the international community as a whole, the following information has been made available with a view to providing an enhanced level of transparency.


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EMINCAR, Cuba

Indicator Description 1 "Tailings Facility" Name/Identifier Presa de Colas 2 Location/ Geographical coordinates 22°38'16.6"N 83°57'55.2"W 3 Ownership EMINCAR (49% Trafigura and 51% Geominera) 4 Status (Active/ In-active/ Closed) Active 5 Date of initial operation 2018

6 Facility operated as per design? Yes. TSF operated within approved designs and under construction for next phase lift.

7 Raising method Downstream rock fill construction 4H:1V Downstream, 3H:1V Upstream slope.

8 Current Maximum Height (m) 18m

9 Current Tailings Storage Impoundment Volume (Mm3) 1.45M m³

10 Max Capacity/ Planned Tailings Storage Impoundment Volume in 5 years time (Mm3)

Max capacity 1.75M m³; Ultimate capacity 2.12M m³;

11 Most Recent Independent Expert Review SRK (2019)

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Do you have full and complete relevant engineering records including design, construction, operation, maintenance, and/or closure?

Yes

13 What is your hazard categorisation of this facility, based on the consequence of failure?

CDA: High risk

14 Guideline used to determine the category?

Canadian Dam Association (CDA) Safety Guideline 2007 (2013 Edition)

15 Has the facility failed in the past? No

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Do you have internal engineering specialist oversight of this facility? Or do you have external engineering support for this purpose?

Yes. Construction specialist and operation support provided by SRK.

17 Failure Modelling? When? Yes (WSP 2016) 18 Is there a closure plan? Yes

19 Does our model account for expected future climate changes? No


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Catalina Huanca, Peru

2.1 Ramahuayco

Indicator Description 1 "Tailings Facility" Name/Identifier Ramahuayco 2 Location/ Geographical coordinates S 13°59´05´ W73°56´17´ 3 Ownership CATALINA HUANCA (100% Trafigura) 4 Status (Active/ In-active/ Closed) Active 5 Date of initial operation 2010 6 Facility operated as per design? Yes 7 Raising method Compacted dry tailing. Slope downstream 1.75H:1V. 8 Current Maximum Height (m) 128.8m



Max capacity up to 4.2M m³. Expansion plan - 5Mt m³more.


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Design yes. Construction yes. Closure is in progress.


Category in function of Peruvian norm: Risk classification A (TBC). CDA: Significant.




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It has internal and external engineering support (SRK Consulting).

17 Failure Modelling? When? In progress by GEO-LOGIC. 18 Is there a closure plan? Yes



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2.2 CR6

Indicator Description 1 "Tailings Facility" Name/Identifier CR6 2 Location/ Geographical coordinates S 14°00´43´ W73°58´21´ 3 Ownership CATALINA HUANCA (100% Trafigura) 4 Status (Active/ In-active/ Closed) Closed 5 Date of initial operation From old operation 6 Facility operated as per design? Yes

7 Raising method Slurry deposit, reinforced soil with geogrids. Slope downstream 1.1H:1V 1H:1V.

8 Current Maximum Height (m) 17.88m



0.05M m³


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Category in function of Peruvian norm: Risk classification B. CDA: High.




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2.3 Pacuni

Indicator Description 1 "Tailings Facility" Name/Identifier Pacuni 2 Location/ Geographical coordinates S14°00´30´´ W73°58´32´´ 3 Ownership CATALINA HUANCA (100% Trafigura) 4 Status (Active/ In-active/ Closed) Closed 5 Date of initial operation 2011 6 Facility operated as per design? Yes

7 Raising method Dry tailing. Slope downstream 1.1H:1V 1H:1V.




0.13M m³


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2.4 CR7

Indicator Description 1 "Tailings Facility" Name/Identifier CR7 2 Location/ Geographical coordinates S14°00´45´´ W73°58´16´´ 3 Ownership CATALINA HUANCA (100% Trafigura) 4 Status (Active/ In-active/ Closed) Active 5 Date of initial operation 2005 6 Facility operated as per design? Yes

7 Raising method Slurry deposit, reinforced soil with geogrids. Slope downstream 1.1H:1V 1H:1V, Upstream 0.75H:1V.




0.13M m³


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Anvil Mining Congo, DRC

3.1 Kapulo

Indicator Description

1 "Tailings Facility" Name/Identifier Main Embankment / Saddle Embankment & Southern Embankment

2 Location/ Geographical coordinates 8°17'40.37"S 29°13'50.91"E

3 Ownership Anvil Mining Congo (indirectly controlled (90% stake) by Galena)

4 Status (Active/ In-active/ Closed) Active 5 Date of initial operation 2014 6 Facility operated as per design? Decant system replaced by floating pumps. 7 Raising method Downstream, compacted laterite. 8 Current Maximum Height (m) 45m

9 Current Tailings Storage Impoundment Volume (Mm3) 1.13Mm3


2.15 Mm3. This is the final volume after phase3 completion.

11 Most Recent Independent Expert Review 2019 (Knight Piesold)

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Do you have full and complete relevant engineering records including design, construction, operation, maintenance, and/or closure

Yes, TSF under construction of last stage.


CDA: Very high.


Canadian Dam Association (CDA) Safety Guideline 2007 (2013 Edition) and ANCOLD publication, ‘Guidelines on Tailings Dams’ (2012).


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Yes, both. Orion Rock (geotechnical & Mining consulting)

17 Failure Modelling? When? Yes, in 2014.

18 Is there a closure plan? Existent rehabilitation and closure concept. Coffey environmental studies and internal standard cover the closure.



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3.2 Dikulushi

Indicator Description 1 "Tailings Facility" Name/Identifier Dikulushi 2 Location/ Geographical coordinates 8°53'14"S 28°16'8"E

3 Ownership Anvil Mining Congo (indirectly controlled (90% stake) by Galena)

4 Status (Active/ In-active/ Closed) Closed 5 Date of initial operation September 2002 6 Facility operated as per design? Dam not in operation anymore. 7 Raising method Starter wall and two upstream earth wall raises. 8 Current Maximum Height (m) 13 -15m.

9 Current Tailings Storage Impoundment Volume (Mm3)


11 Most Recent Independent Expert Review 2019 (Knight Piesold)

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No


High




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Yes, both. Orion Rock (geotechnical & Mining consulting)

17 Failure Modelling? When?

18 Is there a closure plan?



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MATSA, Spain Indicator Description

1 "Tailings Facility" Name/Identifier Main Dam 2 Location/ Geographical coordinates Long -6°50'38.96", Lat 37°46'2.62"

3 Ownership Minas de Aguas Teñidas S.A. (MATSA). JV between Trafigura (50%) and Mubadala Investment Company (50%).

4 Status (Active/ In-active/ Closed) Active 5 Date of initial operation 2008

6 Facility operated as per design? TSF is operated as per approved designs with authorities.

7 Raising method Main dam: slope downstream 2.5H: 1V, slope upstream 2H: 1V. Dam 1, Phase I (upstream): slope downstream: 2.5H: 1V. Wall made of compacted rock.

8 Current Maximum Height (m) 44m

9 Current Tailings Storage Impoundment Volume (Mm3) 7.34M m3


15.54M m3

11 Most Recent Independent Expert Review DMT review on November 2017. GOLDER review during 2018 in order to assurance "TSF Integral Use" construction.

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Yes


TSF is type A category in order to spanish law. CDA: Significant.


RD 975/2009, about waste mining management and mining sites restoration, based on 2006/21/CE european directive and Canadian Dam Association (CDA) Safety Guideline 2007 (2013 Edition).


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MATSAs internal engineering group provides oversight the facility, as established in OMS Manual. External engineering by GOLDER, oversights deposition plan and gives paste management recomendations monthly.

17 Failure Modelling? When? Yes

18 Is there a closure plan?

TSF has a closure plan that was submitted and approved by authorities before deposition started. Closure plan is updated every time that expansion projects for TMF is submitted for authorization.



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MMI, Brazil

5.1 B1 Auxiliar

Indicator Description 1 "Tailings Facility" Name/Identifier B1 Auxiliar 2 Location/ Geographical coordinates Lat: -20°06'12.700" Long: -44°17'17.500" 3 Ownership MMI (40.3% Trafigura and 40.3% Mubadala) 4 Status (Active/ In-active/ Closed) Inactive 5 Date of initial operation ~2007 6 Facility operated as per design? Yes

7 Raising method Upstream and Downstream, made of compacted clay material

8 Current Maximum Height (m) 68



2.4M m³

11 Most Recent Independent Expert Review STATUM (2019)

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Yes


High as per Brazilian regulations. CDA: Extreme.


Brazilian regulations (Ordinance 70 389) and Canadian Dam Association (CDA) Safety Guideline 2007 (2013 Edition).


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Internal engineering specialist and a 3rd party auditors only (STATUM).

17 Failure Modelling? When? 2017 18 Is there a closure plan? Yes

19 Does our model account for expected future climate changes? Yes


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5.2 B1 Ipê

Indicator Description 1 "Tailings Facility" Name/Identifier B1 Ipê 2 Location/ Geographical coordinates Lat: -20°07'11.300" Long: -44°18'26.900" 3 Ownership MMI (40.3% Trafigura and 40.3% Mubadala) 4 Status (Active/ In-active/ Closed) Inactive 5 Date of initial operation ~1991

6 Facility operated as per design? Yes. Current crest elevation not in compliance with permits (3m above), but design was made considering this elevation.

7 Raising method Downstream, made of compacted tailings material 8 Current Maximum Height (m) 55

9 Current Tailings Storage Impoundment Volume (Mm3) ~1.0M m³


~1.0M m³

11 Most Recent Independent Expert Review Terra Cota (2019)

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Yes


Medium as per Brazilian regulations. CDA: High.




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Internal engineering specialist and a 3rd party auditors only (Terra Cota).




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5.3 B1 Tico-Tico

Indicator Description 1 "Tailings Facility" Name/Identifier B1 Tico-Tico 2 Location/ Geographical coordinates Lat: -20°06'06.400" Long: -44°17'20.600" 3 Ownership MMI (40.3% Trafigura and 40.3% Mubadala) 4 Status (Active/ In-active/ Closed) Closed 5 Date of initial operation 1990 6 Facility operated as per design? Yes 7 Raising method Downstream, made of compacted clay material 8 Current Maximum Height (m) 22



0.18M m³

11 Most Recent Independent Expert Review Terra Cota (2019)

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Yes






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Internal engineering specialist and a 3rd party auditors only (Terra Cota).




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5.4 B2

Indicator Description 1 "Tailings Facility" Name/Identifier B2 2 Location/ Geographical coordinates Lat: -20°06'37.550" Long: -44°17'12.020" 3 Ownership MMI (40.3% Trafigura and 40.3% Mubadala) 4 Status (Active/ In-active/ Closed) Inactive 5 Date of initial operation ~1990 6 Facility operated as per design? Yes 7 Raising method Upstream, made of tailings 8 Current Maximum Height (m) 80



1.5M m³

11 Most Recent Independent Expert Review STATUM (2019)

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No






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Internal engineering specialist and a 3rd party auditors only (STATUM).



tailing storage facilities under the direct and indirect ......catalina huanca, peru 2.1 ramahuayco...

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