ACCORDING TO PLAN CONSTANCIA MINE SITE VISIT September 2014 - - PowerPoint PPT Presentation

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ACCORDING TO PLAN CONSTANCIA MINE SITE VISIT September 2014 Cautionary Information Forward Looking Information This presentation contains forward -looking statements and forward -looking information (collectively, forward


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SLIDE 1

ACCORDING TO PLAN

CONSTANCIA MINE SITE VISIT September 2014

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SLIDE 2

CONSTANCIA PRESENTATION l 2

Cautionary Information

Forward Looking Information This presentation contains “forward-looking statements” and “forward-looking information” (collectively, “forward-looking information”) within the meaning of applicable Canadian and United States securities legislation. All information contained in this presentation, other than statements of current and historical fact, is forward-looking

  • information. Often, but not always, forward-looking information can be identified by the use of words such as “plans”, “expects”, “budget”, “guidance”, “scheduled”,

“estimates”, “forecasts”, “strategy”, “target”, “intends”, “objective”, “goal”, “understands”, “anticipates” and “believes” (and variations of these or similar words) and statements that certain actions, events or results “may”, “could”, “would”, “should”, “might” “occur” or “be achieved” or “will be taken” (and variations of these or similar expressions). All of the forward-looking information in this presentation is qualified by this cautionary note. Forward looking information includes, but is not limited to, statements with respect to the anticipated timing, mechanics, completion of the subsequent acquisition transaction to acquire the remaining shares of Augusta Resource Corporation (“Augusta”) the permitting, development and financing of Augusta’s Rosemont copper project (the “Rosemont project”), Hudbay’s objectives, strategies, intentions, expectations and guidance and future financial and operating performance and prospects, production at Hudbay’s 777, Lalor and Reed mines and initial production from the Constancia project, continued processing at Hudbay’s Flin Flon concentrator, Snow Lake concentrator and Flin Flon zinc plant, Hudbay’s ability to complete the development of Hudbay’s Lalor and Constancia projects and the anticipated scope and cost

  • f any development plans for these projects, anticipated timing of Hudbay’s projects and events that may affect the company’s projects, including the anticipated issue
  • f required licenses and permits, Hudbay’s expectation that it will receive the remaining deposit amount under its amended precious metals stream transaction with

Silver Wheaton Corp. (“Silver Wheaton”) and that additional funding will be available if needed under Hudbay’s standby credit facility for Constancia, the anticipated effect of external factors on revenue, such as commodity prices, anticipated exploration and development expenditures and activities and the possible success of such activities, estimation of mineral reserves and resources, mine life projections, timing and amount of estimated future production, reclamation costs, economic outlook, government regulation of mining operations, and business and acquisition strategies. Forward-looking information is not, and cannot be, a guarantee of future results or events. Forward-looking information is based on, among other things, opinions, assumptions, estimates and analyses that, while considered reasonable by us at the date the forward-looking information is provided, inherently are subject to significant risks, uncertainties, contingencies and other factors that may cause actual results and events to be materially different from those expressed or implied by the forward-looking information. The material factors or assumptions that Hudbay identified and were applied by the company in drawing conclusions or making forecasts or projections set out in the forward looking information include, but are not limited to: the success of mining, processing, exploration and development activities; the accuracy of geological, mining and metallurgical estimates; the costs of production; the supply and demand for metals Hudbay produces; no significant and continuing adverse changes in financial markets, including commodity prices and foreign exchange rates; the supply and availability of reagents for Hudbay’s concentrators; the supply and availability of concentrate for Hudbay’s processing facilities for the company’s concentrate; the supply and the availability of third party processing facilities for Hudbay’s concentrate; the supply and availability of all forms of energy and fuels at reasonable prices; the availability of transportation services at reasonable prices; no significant unanticipated operational or technical difficulties; the execution of Hudbay’s business and growth strategies, including the success of Hudbay’s strategic investments and initiatives; the availability of financing for Hudbay’s exploration and development projects and activities; the ability to complete project targets on time and on budget and other events that may affect Hudbay’s ability to develop Hudbay’s projects; the timing and receipt of various regulatory and governmental approvals; the availability of personnel for Hudbay’s exploration, development and operational projects and ongoing employee relations; Hudbay’s ability to secure required land rights to complete its Constancia project; maintaining good relations with the communities in which Hudbay operates, including the communities surrounding the Constancia project and First Nations communities surrounding the Lalor project and Reed mine; no significant unanticipated challenges with stakeholders at Hudbay’s various projects, including the company’s newly acquired Rosemont project; no significant unanticipated events or changes relating to regulatory, environmental, health and safety matters; no contests over title to Hudbay’s properties, including as a result of rights or claimed rights of aboriginal peoples; the timing and possible outcome of pending litigation and no significant unanticipated litigation; certain tax matters, including, but not limited to current tax laws and regulations and the refund of certain value added taxes from the Canadian and Peruvian governments; no significant and continuing adverse changes in general economic conditions or conditions in the financial markets; and the timing and completion of a subsequent acquisition transaction in connection with Hudbay’s acquisition of Augusta.

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SLIDE 3

CONSTANCIA PRESENTATION l 3

Cautionary Information (continued)

Forward Looking Information (continued) The risks, uncertainties, contingencies and other factors that may cause actual results to differ materially from those expressed or implied by the forward-looking information may include, but are not limited to, the development of the Rosemont project not occurring as planned, the exercising of dissent and appraisal rights by Augusta shareholders should a subsequent acquisition transaction be undertaken in connection with Hudbay’s acquisition of Augusta, Augusta continuing as a majority-owned subsidiary of Hudbay should a subsequent acquisition transaction not be completed, the inaccuracy of Augusta’s public disclosure and representations in the support agreement upon which Hudbay’s

  • ffer to acquire Augusta was predicated, the failure to obtain required approvals or clearances from government authorities on a timely basis,

risks generally associated with the mining industry, such as economic factors (including future commodity prices, currency fluctuations, energy prices and general cost escalation), uncertainties related to the development and operation of Hudbay’s projects (including the impact on project cost and schedule of construction delays and unforeseen risks and other factors beyond the company’s control), depletion of Hudbay’s reserves, risks related to political or social unrest or change and those in respect of aboriginal and community relations, rights and title claims,

  • perational risks and hazards, including unanticipated environmental, industrial and geological events and developments and the inability to

insure against all risks, failure of plant, equipment, processes, transportation and other infrastructure to operate as anticipated, compliance with government and environmental regulations, including permitting requirements and anti-bribery legislation, dependence on key personnel and employee relations, volatile financial markets that may affect Hudbay’s ability to obtain financing on acceptable terms, uncertainties related to the geology, continuity, grade and estimates of mineral reserves and resources and the potential for variations in grade and recovery rates, uncertain costs of reclamation activities, Hudbay’s ability to comply with its pension and other post-retirement obligations, the company’s ability to abide by the covenants in Hudbay’s debt instruments or other material contracts, tax refunds, hedging transactions, as well as the risks discussed under the heading “Risk Factors” in this presentation and Hudbay’s most recent Annual Information Form. Should one or more risk, uncertainty, contingency or other factor materialize or should any factor or assumption prove incorrect, actual results could vary materially from those expressed or implied in the forward-looking information. Accordingly, you should not place undue reliance on forward-looking information. Hudbay does not assume any obligation to update or revise any forward-looking information after the date of this presentation or to explain any material difference between subsequent actual events and any forward-looking information, except as required by applicable law.

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SLIDE 4

CONSTANCIA PRESENTATION l 4

Cautionary Information (continued)

The scientific and technical information in respect of Hudbay contained in this presentation related to the Constancia project has been prepared by or under the supervision of Cashel Meagher, P.Geo., Hudbay’s Vice President, South America Business Unit. The scientific and technical information related to all other sites and projects of Hudbay contained in this presentation has been prepared by or under the supervision of Robert Carter, P.Eng., Hudbay’s Director, Technical Services. Messrs. Meagher and Carter are Qualified Persons for the purposes of NI 43-101 – Standards of Disclosure for Mineral Projects. (“NI 43-101”). The mineral reserve and resource estimates included in

  • r underlying assumptions referenced in this presentation were prepared in accordance with NI 43-101 and the Canadian Institute on Mining,

Metallurgy and Petroleum Standards on Mineral Resources and Reserves: Definitions and Guidelines. Mineral resources that are not mineral reserves do not have demonstrated economic viability. For a description of the key assumptions, parameters and methods used to estimate mineral reserves and resources, as well as data verification procedures and a general discussion of the extent to which the estimates may be affected by any known environmental, permitting, legal, title, taxation, socio-political, marketing or other relevant factors, please see the Technical Reports for each of Hudbay’s properties as filed on SEDAR at www.sedar.com. The disclosure in this presentation uses mineral resource classification terms and mineral resource estimates that comply with NI 43-101. NI 43-101 establishes standards for all public disclosure a Canadian issuer makes of scientific and technical information concerning mineral

  • projects. Unless otherwise indicated, all reserve and resource estimates contained herein have been prepared in accordance with NI 43-101.

These standards differ significantly from the mineral reserve disclosure requirements of the SEC set forth in Industry Guide 7. Consequently, reserve and resource information contained herein is not comparable to similar information that would generally be disclosed by U.S. companies in accordance with the rules of the SEC. In particular, the SEC’s Industry Guide 7 applies different standards in order to classify mineralization as a reserve. As a result, the definitions

  • f proven and probable reserves used in NI 43-101 differ from the definitions in SEC Industry Guide 7. Under SEC standards, mineralization

may not be classified as a “reserve” unless the determination has been made that the mineralization could be economically and legally produced or extracted at the time the reserve determination is made. Among other things, all necessary permits would be required to be in hand or their issuance imminent in order to classify mineralized material as reserves under the SEC standards. Accordingly, mineral reserve estimates referred to herein may not qualify as “reserves” under SEC standards. In addition, the terms “measured mineral resources,” “indicated mineral resources” and “inferred mineral resources” are used to comply with the reporting standards in Canada. The SEC’s Industry Guide 7 does not recognize mineral resources and U.S. companies are generally not permitted to disclose resources in documents they file with the SEC. Investors are specifically cautioned not to assume that any part or all of the mineral deposits in these categories will ever be converted into SEC defined mineral reserves. Further, “inferred resources” have a great amount of uncertainty as to their existence and as to whether they can be mined legally or economically. Therefore, investors are also cautioned not to assume that all or any part of an inferred resource exists. It cannot be assumed that all or any part of “measured mineral resources,” “indicated mineral resources,” or “inferred mineral resources” will ever be upgraded to a higher category. Investors are cautioned not to assume that any part of the reported “measured mineral resources,” “indicated mineral resources,” or “inferred mineral resources” contained herein is economically or legally mineable. For the above reasons, information contained herein containing descriptions of mineral reserve and resource estimates is not comparable to similar information made public by U.S. companies subject to the reporting and disclosure requirements of the SEC.

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SLIDE 5
  • 1. Project Overview
  • 2. Project Management
  • 3. Mine Operations
  • 4. Human Resources Staffing & Training
  • 5. Corporate Affairs & Social Responsibility
  • 6. Exploration

Appendix

Table of Contents

CONSTANCIA PRESENTATION l 5

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SLIDE 6

1

Project Overview

CONSTANCIA PRESENTATION l 6

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SLIDE 7

CONSTANCIA PRESENTATION l 7

Project Timeline & History

2010 2011 2012 2013 2014 2015

ESIA permit received

Nov 2010

Note: All timelines are estimates

US$116mm Constancia pre- construction program begins

Mar 2011

Initial resource announced at higher grade Pampacancha deposit

Apr 2012

Neighbouring community agreements reached

H1 2012

Beneficiation concession permit received

Jun 2012

Updated capital cost estimate indicates increase of ~10%

Aug 2013

ESIA Modification 1 approved

Sep 2013

Hudbay’s board approves construction of Constancia

Aug 2012

All critical path families resettled

Apr 2014

Pre-stripping commences

Mar 2014

Powerline energized

Aug 2014

Hudbay acquires Constancia

Jul 2011

Expected first

  • re production

Q4 2014

Expected commercial production

Q2 2015

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SLIDE 8

CONSTANCIA PRESENTATION l 8

Construction Progress

Lima

PERU

Constancia

2013 Over 16 million man- hours without lost time accident recently achieved Project ~85% complete as at June 30, 2014 On track for first production in Q4 2014, commercial production in Q2 2015 2014

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SLIDE 9

Location & Infrastructure

Infrastructure & power expected to be available to meet Constancia project schedule

CONSTANCIA PRESENTATION l 9

83km access road from Yauri

>

Upgraded for concentrate haulage post commissioning

Tintaya power substation 70km away

>

Construction of power transmission line from Tintaya complete and was energized in August 2014

>

Socabaya to Tintaya 220kV transmission line upgrade is complete and was energized in April 2014

Rail-head at Imata 150km away

>

Pursuing bi-modal transportation solution

~475km from Matarani Port by road Port access and power supply secured under 10-year contracts

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SLIDE 10

CONSTANCIA PRESENTATION l 10

Key Project Metrics

Ownership 100% Mine life 22 years Daily ore throughput 80k tpd Mine and mill unit cost1,2 US$7.48/tonne Years 1-51 Years 6-221 Life of Mine1

  • Avg. annual Cu production3

116k tonnes 71k tonnes 82k tonnes Cash cost per Cu lb4 US$0.98/lb US$1.37/lb US$1.25/lb

  • Avg. annual sustaining capital

US$80 million US$38 million US$47 million

Source: Hudbay company disclosure

  • 1. LOM as per NI 43-101 Technical Report on the Constancia Project dated October 15, 2012 and subsequent updates to project estimates in public disclosure
  • 2. Combined mine and mill unit operating costs per tonne of ore processed
  • 3. Production is contained metal in concentrate
  • 4. Net of by-products. Includes impact of silver and gold streams. Assumed metal prices per the Silver Wheaton stream agreement are as follows: Gold US$400/oz, Silver US$5.90/oz. Other metal price assumptions

include: Molybdenum 2014-US$12/lb, 2015-US$13/lb, 2016-US$13/lb, LT-US$13.50/lb; Gold 2014-US$1,350/oz, 2015-US$1,325/oz, 2016-US$1,300/oz, 2017-US$1,275/oz, LT-US$1,250/oz. Excludes profit sharing

>

The March 2014 reserve update incorporated an expected tailings facility expansion allowing for the conversion of a portion of the mineral resources into reserves, resulting in a mine life extension to 22 years (from 16 years)

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SLIDE 11

CONSTANCIA PRESENTATION l 11

Flow Sheet

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SLIDE 12

2

Project Management

CONSTANCIA PRESENTATION l 12

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SLIDE 13

Safety Share

Constancia project has over 30 M man-hours worked with only 13 LTI´s and has completed over 16 million man-hours since the last LTI

CONSTANCIA PRESENTATION l 13

Lightning Protection at Constancia Richard Kithil, President, National Lightning Safety Institute (NLSI) LIGHTNING PROTECTION FOR FACILITIES, OPERATIONS & PERSONNEL

>

NLSI Lightning Protection Defenses Template

>

Grounding, Bonding & Surge Protection

>

Air Terminals, other forms of protection

>

Safe Shelter Details

>

Alert methods & protocol

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SLIDE 14

Project Summary

Lima

PERU

Constancia Lima

PERU

Constancia

CONSTANCIA PRESENTATION l 14

Project has US$1.4 billion incurred and has committed an additional US$0.2 billion as of June 30, 2014 Highlights:

>

Project approximately 85% complete as at June 30, 2014

>

Structures in place for water capture, 2015 dry season

>

Mine pre-stripping started in March 2014

>

All 4 mills in place with drives; alignment in progress

>

Flotation cells in place, concentrate filters placed, thickener under construction

>

Power transmission line energized in August 2014

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SLIDE 15

Orientation from Site Visit

AREA 4 TEMASEK PRESENTATION l 15

1 2 3 4

CONSTANCIA PRESENTATION l 15

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SLIDE 16

External Partners

CONSTANCIA PRESENTATION l 16

Stratcon GyM – Mining Contractor and Major Earth Works

>

Established labour force and operating team

>

Experience operating in Peru (Toromocho, El Brocal, Marcona, La Arena)

>

Constancia earth works responsibilities include: bog dam, TMF East and West, WRF and ponds, main sediment pond, haul road, construction roads, access roads, diversion channels, Cunahuiri reservoir

Ausenco – Plant Construction

>

Constructed and delivered similar plants in remote locations (Lumwana, Phu Kham, Cadia East)

>

Assembled sizable team in Latin America

Knight Piesold – Engineering

>

Detailed engineering design

>

Permit modification assistance (environmental compliance)

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SLIDE 17

TEMASEK PRESENTATION l 17

Heavy Civil Works and Mining

CONSTANCIA PRESENTATION l 17

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SLIDE 18

Heavy Civil Works and Mining Milestones

CONSTANCIA PRESENTATION l 18

>

Tailing liner well under way and toe dam in progress

>

Water capture initiated Dec 2013 in main sediment pond

>

Mine pre stripping started in Mar 2014, on schedule for Q4 start-up

Main sediment pond Pre-stripping activities

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SLIDE 19

Pre-Stripping Progress

CONSTANCIA PRESENTATION l 19

>

Approximately 19 million tonnes of material moved to-date

>

Approximately 400k tonnes of ore on the ROM pad

Month Waste (tons) Ore (tons) Total (tons) March 531,976 531,976 April 2,357,194 2,357,194 May 3,479,965 3,479,965 June 4,305,408 4,305,408 July 3,848,495 434,205 4,282,700 August 3,779,699 3,779,699 18,302,737 434,205 18,736,942 Total Pre-Strip Requirement 26 Million

Current ore stockpile at ROM pad

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SLIDE 20

Heavy Civil Scope of Work

TEMASEK PRESENTATION l 20

Facilities List

  • Bog Dam
  • TMF East
  • TMF West
  • WRF and Ponds
  • Main Sediment Pond
  • Topsoil Stockpile
  • Haul Road
  • Access Roads
  • Diversion Channels
  • Landfill Area

CONSTANCIA PRESENTATION l 20

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SLIDE 21

Site Water Management

TEMASEK PRESENTATION l 21 CONSTANCIA PRESENTATION l 21

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SLIDE 22

TEMASEK PRESENTATION l 22

Process Plant Engineering, Procurement and Construction Management

CONSTANCIA PRESENTATION l 22

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SLIDE 23

Process Plant Construction - Current Status

TEMASEK PRESENTATION l 23

Man-hours Time

CONSTANCIA PRESENTATION l 23

>

Engineering is substantially complete and procurement is at 93% complete

>

In the primary crusher area, crusher and the modules of the reclaim conveyors to the grinding area are being completed

>

SAG and ball mill shells and heads are 100% assembled, including trunnion installation, pinion and girth gears, currently under alignment

>

In the flotation area, all rougher cells are assembled as well as all cleaning cells and internal equipment installation

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SLIDE 24

TEMASEK PRESENTATION l 24

Offsite Infrastructure & Services

CONSTANCIA PRESENTATION l 24

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SLIDE 25

Power

TEMASEK PRESENTATION l 25 CONSTANCIA PRESENTATION l 25

Power Transmission Line

>

Engineering and procurement are 100% complete, tie in to high voltage side of substation was completed in April, tower construction is 100% complete

>

Successful negotiations with Glencore Tintaya for ROW agreement

>

System was energized in August 2014

Power Supply

>

Signed 10-year power purchase contract, with 5 year extension right

>

Costs are in-line with expectations

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SLIDE 26

Concentrate Transport

TEMASEK PRESENTATION l 26 CONSTANCIA PRESENTATION l 26

>

Route from Constancia to Matarani is 460 kms total

>

Proposals have been received and reviewed 4 transport companies – trucking firms have lowest rate

>

Final contract negotiations underway and contract expected to be awarded in Q3 2014

>

Service start date of Dec 2014

>

Potential for bimodal transportation in long-term

  • Rail head located 150km away at

Imata

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SLIDE 27

Port Services

TEMASEK PRESENTATION l 27 CONSTANCIA PRESENTATION l 27

TISUR – Port Operator Under concession from the State Facilities & Expansion plans TISUR Grain Warehouse A5

>

Enclose for concentrate service to capacity of 25,000 wmt

Expansion Options

>

Discussions with Ares warehouse for addition capacity

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SLIDE 28

TEMASEK PRESENTATION l 28

Plant Commissioning

CONSTANCIA PRESENTATION l 28

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SLIDE 29

Commissioning Stages

TEMASEK PRESENTATION l 29

Responsibility Construction Team C0 Verification of Plant and Equipment Verification by the construction team that the installation of an individual item of plant or equipment meets the design intent.

CONSTANCIA PRESENTATION l 29

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SLIDE 30

Commissioning Stages

TEMASEK PRESENTATION l 30

Responsibility Construction Team C0 Verification of Plant and Equipment Inspection and no-load energisation of an item of plant or equipment by the commissioning team to verify conformance with design. C1 Dry Commissioning

C0 Checksheets + Punch lists

CONSTANCIA PRESENTATION l 30

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SLIDE 31

Commissioning Stages

TEMASEK PRESENTATION l 31

Responsibility Construction Team C0 Verification of Plant and Equipment Testing of an individual or group of integrated items of plant or equipment under benign load (air or water) ultimately demonstrating stable operation of a process commissioning module under this load. C1 Dry Commissioning C2 Wet Commissioning

C0 Checksheets + Punch lists C1 Checksheets + Punch lists

CONSTANCIA PRESENTATION l 31

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SLIDE 32

Commissioning Stages

Responsibility Construction Team Commissioning Team C0 Verification of Plant and Equipment Initial introduction of ore and process fluids and testing of an individual or group

  • f integrated process commissioning

modules to demonstrate stable operation at pre-determined operation parameters. C1 Dry Commissioning C2 Wet Commissioning C3 Ore Commissioning

C0 Checksheets + Punch lists C1 Checksheets + Punch lists C2 Checksheets + Practical Completion Certificate

CONSTANCIA PRESENTATION l 32

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SLIDE 33

Commissioning Stages

Responsibility Construction Team Commissioning Team Client Operation Team C0 Verification of Plant and Equipment Completion of all commissioning activities including preparation of a Commissioning Closeout Report and handover of agreed commissioning documentation deliverables to the Client C1 Dry Commissioning C2 Wet Commissioning C3 Ore Commissioning C4 Performance Verification C5 Area Acceptance C6 Commissioning Closeout

C0 Checksheets + Punch lists C1 Checksheets + Punch lists C2 Checksheets + Practical Completion Certificate

CONSTANCIA PRESENTATION l 33

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SLIDE 34

Projected Ramp-up vs. Antapaccay

>

The near-by Antapaccay mine recently commenced production and has similar size and flowsheet to Constancia (direct comparable)

>

Projected 9-month ramp-up at Constancia is more conservative than actual ramp- up achieved at Antapaccay

CONSTANCIA PRESENTATION l 34

100 92 92 92 79 79 66 66 45 90 104 104 63 86 92 85 48 24 20 40 60 80 100 120 (% Design) Month

Ore Grinding Ramp-up

CONSTANCIA ANTAPACCAY

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SLIDE 35

Project Closure Planning – De-mobilization

CONSTANCIA PRESENTATION l 35

>

Effective and efficient handover of documentation – data > information > knowledge

>

Closeout of punch lists – defects, warranty issues, early life failures and incomplete work

>

Commissioning and operational ramp-up – roles and responsibilities

>

Multiple systems in commissioning, early operations complexity – steep learning curve

>

Post contract support

>

Integration with Hudbay’s IT systems and ERP

>

Progressive closeout

>

Asset protection – security assessment and implementation

>

Post closeout reviews

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SLIDE 36

3

Mine Operations

CONSTANCIA PRESENTATION l 36

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SLIDE 37

Annual Tonnage Movement

10,000,000 20,000,000 30,000,000 40,000,000 50,000,000 60,000,000 70,000,000 80,000,000 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036

Annual Total Movement

Crusher Waste Dump Rehandle

CONSTANCIA PRESENTATION l 37

Tonnage

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SLIDE 38

Hi Zn SP

Constancia Pit Pampacancha Pit

MG SP HG SP WRF PAG/NAG

NAG SP

Legend

Direct Movement Rehandle Movement Aternative: Pampacancha as Backfill

Process Plant

Copper Concentrate Molybdenum Concentrate

PORT

4.4 Km 2.9 Km 2.5 Km 2.5 Km 2.5 Km 7.0 Km 6.6 Km 4.5 Km 5.0 Km 5.6Km 9.3 Km 6.7Km 3.3 Km 2.4 Km 2.4 Km 2.4 Km

Haulage Network

CONSTANCIA PRESENTATION l 38

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SLIDE 39

Mine Equipment

10 20 30 40 50 60 70 80 90 5 10 15 20 25 30 35 40

2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036

Mine Equipment Requirement

Truck - CAT 793F Drill Rig - Pit Viper 271 - RCS Shovel, Hirachi EX5600 - 6 Loader - CAT 994H P13DEC, Tonnage Movement, Mt

T

  • n

n a g e x m i l l

  • n

U n i t s

  • f

E q u i p m e n t

CONSTANCIA PRESENTATION l 39

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SLIDE 40
  • 1. Mine Planning – MTP (2014-2015)

CONSTANCIA PRESENTATION l 40

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SLIDE 41

Mine Operation – Drilling & Blasting

  • Burden (m): 8
  • Spacing (m): 9
  • Stemming (m): 8.5
  • Blasting projects to date: 14
  • Blasted holes to date: 1,614
  • Tonnage blasted to date: 4,474,852 t
  • Types of blast holes: Production ,buffer and pre-splitting
  • Explosives used: HA28, HA37, HA46, HA64 (depending on

the presence of water and the strength of the rock)

  • Powder factor(explosive kg/break tonnage): 0.14

Pit Viper 271

  • Average

blast hole length (m): 15.8

  • Blast

hole diameter (inch): 9 7/8

  • Instant

Drilling Speed (m/h): 81

  • Average

Drilling Speed (m/h): 55

  • Mechanical

Availability (%): 95

  • Utilization (%): 86

CONSTANCIA PRESENTATION l 41

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SLIDE 42

Mine Operation - Loading

Hitachi EX-5600

  • Bucket capacity (m3): 27
  • Equipment

performance (tph): 3,364

  • Mechanical Availability (%): 94
  • Utilization (%): 95

CAT 994 H

  • Bucket Capacity (m3): 19
  • Equipment

performance (tph): 1,764

  • Mechanical Availability (%): 94
  • Utilization (%): 97

CONSTANCIA PRESENTATION l 42

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SLIDE 43

Mine Operation - Hauling

CAT 793 F

  • Max gradient (%): 10
  • Rolling Resistance (%): 2-4
  • Payload (t): 227
  • Equipment performance (tph):

510

  • Mechanical Availability (%): 86
  • Utilization (%): 85

CONSTANCIA PRESENTATION l 43

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SLIDE 44

Mine Geology: Ore Control Routine – Sampling & Logging BH

Blasthole Sampling Blasthole logging Pit Face Mapping Database Validation

CONSTANCIA PRESENTATION l 44

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SLIDE 45

Weekly Plan – Polygons by Destination (Bench 4335- 4350)

MATPS: Pre-Stripping Material

4335 4350

CONSTANCIA PRESENTATION l 45

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SLIDE 46

Mine Maintenance Reconciliation

MIÉ JUE VIE SÁB DOM LUN MAR 20 21 22 23 24 25 26

EQUIPOS DE OPERACIÓN

1

PE-C0001

250 12 Horas 8 Horas

2

PE-C0002

125 1 Horas 1.5 Horas

6

CF-C0001

125 1 Horas 0 Horas

7

PH-C0001

125 6 Horas 10 Horas

8

PH-C0002

125 2 Horas 2.5 Horas

12

CM-C0001

125 1 Horas 1 Horas

13

CM-C0002

125 1 Horas 0 Horas

14

CM-C0003

250 8 Horas 0 Horas

15

CM-C0004

2000 24 Horas 19.7 Horas

k

CM-C0005

125 1 Horas 1 Horas

18

CM-C0007

125 1 Horas 1 Horas

CM-C0008

125 1 Horas 0 Horas

22

CM-C0011

250 12 Horas 16.7 Horas

23

CM-C0012

2000 24 Horas 24.5 Horas

24

CM-C0013

500 8 Horas 11.5 Horas

25

CM-C0014

500 10 Horas 19 Horas

26

CM-C0015

125 1 Horas 1 Horas

28

CM-C0017

125 1 Horas 0 Horas

29

CM-C0018

125 1 Horas 0 Horas

35

TO-C0001

125 1 Horas 1.6 Horas

36

TO-C0002

125 1 Horas 1 Horas

37

TR-C0001

125 1 Horas 0 Horas

38

MO-C0001

125 1 Horas 0 Horas

MO-C0002

250 5 Horas 8.5 Horas

3 2 1 1 2 2 3 125 Horas 128.5 Horas 103% TIEMPO (Hrs) 3 3 3 3 4 4 4 24 16 67% CANT. (PMs Ejecutados) 21.0 26.0 33.0 13.0 2.0 2.0 2.0 125 Horas

HORAS DE INTERVENCION HORAS REALES

OK

OK se aprovecha euna parada correctiva Se reprograma por horas de trabajo Demora en la prueba de hermeticidad OK Demora en la evaluacion de parametros Equipo en stand by por produccion se re- Se aprovecha el stand by del equipo OK

DETALLE DE LAS DESVIACIONES

Se reprograma el cambio de parabrisas OK TODOS

Item CODIGO EQUIPO AMT

OK Se reprograma por horas de trabajo

Inoperativo por recarga del sistema contra

Demoras en las pruebas de OK Se reprograma por horas de trabajo

Inoperativo por recarga del sistema contra

Se reprograma por horas de trabajo Se aprovecha el stand by del equipo OK OK Se reprograma por horas de trabajo

CONSTANCIA PRESENTATION l 46

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SLIDE 47

Mine Maintenance KPI´s

CONSTANCIA PRESENTATION l 47

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SLIDE 48
  • 3. G&H: Geotechnical Work

A

Section A–A: View

  • f

achieved angles versus design angles. The achieved angles are 60°.

PIT OPERATIONAL WORK NAG OPERATIONAL WORK

The current discharge

  • n the WRF – NAG is

been developed to form the final lifts 4140 and 4160, and to form the lift 4180. Panoramic view of bench 4425 – 4410, Constancia Pit.

CONSTANCIA PRESENTATION l 48

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SLIDE 49

Water Management Plan

Panoramic View Actual - WRF

CONSTANCIA PRESENTATION l 49

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SLIDE 50

4

Human Resources Staffing & Training

CONSTANCIA PRESENTATION l 50

slide-51
SLIDE 51

Operations Management

Operations Director

Eric Caba 23 yrs / Metallurgical Engineer

Process Plant Manager

Hugo Granados 35 yrs/ Metallurgical Engineer

Mine Manager

John Gutierrez 40 yrs / Mining

Technical Services Manager

Javier Toro 17 yrs/ Mining Engineer

Health & Safety Manager

Felix Galvez 12 yrs / Work Relations

Logistics & Admin Manager

John Cederberg 24 yrs / Public Accountant

HR Superintendent

Jose Bandini 19 yrs / Bussiness Administration

Environmental Manager

Julio Roncal 21 yrs / Civil Engineer

Total HC 269

Operations Management Technical Services Process Plant Mine HSE Logistics & Administration Other Functional Support Finance HR

Operations

2 26 149 3 17 37 16 10 9

CONSTANCIA PRESENTATION l 51

slide-52
SLIDE 52

Production Superintendent

Oscar Alvarez 27 yrs/ Chemical Engineer

Electrical/Instrumental Superintendent

Carlos Herrera 32 yrs / Mechanical & Electrical Engineer

Metallurgical Superintendent

Marcial Medina 13 yrs / Metallurgical Engineer

Mechanical Maintenance Superintendent

Manuel Sanchez 30 yrs / Mechanical Eng

Process Plant Manager

Hugo Granados 35 yrs/ Metallurgical Engineer

Administrative Assistant Vacant Operations Director

Eric Caba 23 yrs / Metallurgical Engineer

Tailing Superintendent Vacant

Process Plant

Total HC 149

Admin Ope Maintenance Metallurgical Electrical / Instrumental Production Tailing Operations

2 41 16 32 42 16

CONSTANCIA PRESENTATION l 52

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SLIDE 53

“The objective is to have the right person for the right

job at the right time, and well trained”

TRAINING

  • Train the Trainers:

train staff in safety, technical and leadership competences.

  • Training for Engineers,

Technicians

  • Training for Workers &

Workers from Communities STAFFING FOR SAP

  • Recruit 6

colleagues for SAP Maintenance

  • Interaction with

Ausenco-Rylson in SAP maintenance STAFFING FOR COMMISSIONING

  • Recruit 27 colleagues to

support the pre- commissioning and commissioning phase.

  • A total of 33 colleagues are

involved in Commissioning. READY TO START

  • 100% of positions

duly fit

  • 100% of positions

duly trained.

JAN 2014

NOV 2014

Master Plan for Staffing & Training

STAFFING FOR OPERATIONS

Recruit colleagues for Operations phase, based on recruitment and training planning.

CONSTANCIA PRESENTATION l 53

slide-54
SLIDE 54

28 28 28 28 28 28 28 28 28 59 70 76 89 91 93 105 109 134 195 250 11 6 13 2 2 12 4 25 61 27 19 98 104 117 119 121 133 137 162 223 250 269 20 40 60 80 100 120 140 160 180 200 220 240 260 280 Jan '14 P0 Feb '14 P0a Mar '14 P1 Apr '14 P2 May '14 P3 Jun '14 P4 Jul '14 P5 Aug '14 P6 Sep '14 P7 Oct '14 P8 y P8-C Nov '14 P9

HeadCount Planning Forecast

September 2014

Current HC Lima Current HC Campsite # of HC to Recruit Total HC

Workforce Planning Forecast

CONSTANCIA PRESENTATION l 54

slide-55
SLIDE 55

CONSTANCIA PRESENTATION l 55

Manpower will significantly decline over the coming months as contractors are being demobilized

Total Site Staffing 2014 - Including Contractors

  • 1,000

2,000 3,000 4,000 5,000 6,000

Total Site Staffing

slide-56
SLIDE 56

Recruitment Schedule 2014

(*) Priority P8-C: 17 positions that will be filled by communities’ members, whom were trained by CETEMIN.

Area / Positions Priority Start Recruitment Process Effective Hire Month # of Colleagues to Recruit

Technical Services & Commissioning P0 Nov-13 Jan-14 11 Superintendent / Commissioning P0a Dec-13 Feb-14 6 SAP & Commissioning P1 Dec-13 Mar-14 13 Supervisors P2 Jan-14 Apr-14 2 Superintendent / Supervisor P3 Jan-14 May-14 2 Supervisors / Senior / Auxiliary / Commissioning P4 Feb-14 Jun-14 12 Managers / Technicians P5 Mar-14 Jul-14 4 Supervisors / Senior / Technicians / Auxiliaries P6 Mar-14 Aug-14 25 Supervisors / Operators P7 Apr-14 Sep-14 61 Superintendent / Seniors / Operators P8 y P8-C (*) Apr-14 Oct-14 27 Administratives P9 Jun-14 Nov-14 19

182

Current Positions for Operations - Support Areas 87

269 Total HC Total to Recruit

75

CONSTANCIA PRESENTATION l 56

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SLIDE 57

Ensure the successful of the start up of the plant process, training our colleagues since the beginning, using our own resources, their knowledge, and giving the opportunity to develop our people, and creating our own Hudbay mind-set

> Focus in safety, technical & leadership skills:

  • Safety DS 055-2010 (ISEM / IGH / IPEN)
  • Filters/ Couriers/ Thickeners / Cells (OUTOTEC)
  • Crusher & Mills / Leadership Competencies/ Train of Trainers Simulator

(TECSUP)

  • Simulator (ANDRITZ / TECSUP)
  • DCS (SIEMENS)
  • Mill & Crusher (FLSMIDTH)

> Tools

  • Training presentation
  • Manuals
  • Simulator
  • On the job training in the commissioning phase

Training Strategy

CONSTANCIA PRESENTATION l 57

slide-58
SLIDE 58

Jan - May June July Aug Sep Oct Nov

Training for Commissioning Siemens

Electrical / Instrumental Lima

Training for Workers & Community Workers

Sep '14

Process Plant Construction Completed

Hire for Commissioning Phase (2) Hire for Commissioning & SAP Maintenance Phase (3)

Training for Engineers & Technicians

Aug - Sep'14

Hire for Commissioning & SAP Maintenance Phase (13) Hire for Commissioning Phase (14)

CETEMIN Training Nov ‘13 – May ’14

To fill 17 positions: 2 Mechanical Workshop 6 Samplers operators 6 Tailing Dump Operator 3 Crusher Conveyor Operator

Training Schedule

Start the hiring for Operations (115), based on the schedule

Training for Commissioning Siemens

Electrical / Instrumental Site Aug – Sep ‘14

Tecsup

Supervisors Arequipa Jul – Aug ‘14

Mills & Primary Crusher FLSmidth

Supervisors / Engineers Arequipa

Simulator - Tecsup

Supervisors / Ctrl Room Ope Site

Train the Trainers

Jul - Aug ‘14

Training under Scope of Work of the PO

Outotec

Supervisors Lima Sep – Oct ‘14

Done

Training in Gold Fields La Cima

Aug - Sep ‘14

CONSTANCIA PRESENTATION l 58

slide-59
SLIDE 59

5

Corporate Affairs & Social Responsibility

CONSTANCIA PRESENTATION l 59

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SLIDE 60

Permitting (1/2)

CONSTRUCTION

  • PERMITS FOR CONSTRUCTION ARE IN PLACE:
  • Earthmoving activities, process plant and ancillary facilities, TMF, camps,

MSP, WRF and collection and retention ponds, NAG stockpile, topsoil stockpiles, sediment ponds, haul and access roads and Cunahuiri reservoir.

  • Other permits obtained: authorizations to use and collect water, discharge

permits, fuel permits, water treatment plant permits, permits for power generation and environmental certifications.

OPERATIONS

  • PERMITS TO START PRE-STRIPPING AND CONSTANCIA

DEPOSIT EXPLOITATION ARE IN PLACE

  • Mine permit and its amendment, certificate of mine operator, authorization

to use explosives and permanent magazines and warehouses.

  • PENDING CRITICAL PERMITS FOR OPERATING

PROCESS PLANT

  • Underground Water License Stage 4 / FD: Late Sept-2014
  • Surface Water License Stage 4 / FD: Oct-2014
  • Operation license for TMF 4050 and Process Plant line 2 / FD: Nov-2014
  • Operation license for Process Plant line 1 & moly plant / FD: Jan-2015

CONSTANCIA PRESENTATION l 60

76% 10% 10% 4% Obtained Pending (not required for operation) Pending (required for operations - not critical) Pending (required for operations - critical)

slide-61
SLIDE 61

Permitting (2/2)

RISK DESCRIPTION / ACTIONS

CUNAHUIRI CONTINGENCY PLAN

  • DUE TO LACK OF ACCESS TO ICHUNI VALLEY, A CONTINGENCY PLAN (CP) WAS

DEVELOPED IN ORDER TO MITIGATE the lack of the Cunahuiri reservoir and the possibility to capture water therein for operations and compensation.

  • CP poses a risk because it changes compensation commitment and water balance reflected in other permits.
  • In order to address this change, Hudbay is exploring the possibility to prepare a second environmental

technical report or to include the CP during the round of observations of the ESIA´s second amendment.

  • Likewise, in order to allow construction of infrastructure comprised in the CP (specially NC4

channel), Hudbay has included the CP within the surface water license (Stages 2 and 3). It was approved on April, 2014. CRITICAL PERMITS TIED TO CONSTRUCTION SCHEDULE

  • SOME PERMITS REQUIRE INSPECTIONS TO BE GRANTED. This means that the

corresponding facility must be completed and ready to operate in order to be inspected by the authority.

  • This poses a risk in the case of the Surface water license stage 4 and the Process plant operation licenses.
  • ANY DELAY IN CONSTRUCTION ALSO DELAYS THESE PERMITS.

CONSTANCIA PRESENTATION l 61

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SLIDE 62

Resettlement: Ichuni

NEGOTIATION PROCESS # of families Public deed signed 34 In negotiation 2 Total: 36 HOUSING STATUS # of houses Delivered-To-Owner 32 Pending Delivery Total: 32

CONSTANCIA PRESENTATION l 62

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SLIDE 63

Local Employment and Procurement

CONSTANCIA PRESENTATION l 63

LABOR FORCE

˃ 727 workers from direct & indirect area of Influence

CONTRACT OF RENTAL EQUIPMENT BY COMMUNITIES

˃ Chiloroya: 223 ˃ Uchucarco: 164

FOOD SUPPLIERS IN OPERATION CONTRACT SERVICE

˃ 9 from Uchucarco ˃ 4 from Chilloroya

slide-64
SLIDE 64

2013 Business Invoicing to Project

Chilloroya Uchuccarcco S/. 30,703,201 S/. 10,022,381 S/. 2,988,900 S/. 2,443,488 Rent a Car Food Services

Rent a Car- Equipment and Heavy Equipment

CONSTANCIA PRESENTATION l 64

slide-65
SLIDE 65

2014 Business Invoicing to Project (1/2)

S/. 0 S/. 1,000,000 S/. 2,000,000 S/. 3,000,000 S/. 4,000,000 S/. 5,000,000 S/. 6,000,000 Jan Feb Mar Apr

Rent a Car- Equipment and Heavy Equipment

Chilloroya Uchuccarcco

CONSTANCIA PRESENTATION l 65

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SLIDE 66

2014 Business Invoicing to Project (2/2)

S/. 0 S/. 50,000 S/. 100,000 S/. 150,000 S/. 200,000 S/. 250,000 S/. 300,000 S/. 350,000 S/. 400,000 S/. 450,000 Jan Feb Mar Apr May Jun

Food Services

Chilloroya Uchuccarcco

CONSTANCIA PRESENTATION l 66

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SLIDE 67

Demobilization

637

local workers have been demobilized

(January – August 2014)

Owned Rented Un- registered External TOTAL Heavy equipment 9 16 7 77

109

Light equipment 22 10 7 34

73

Machinery- yellow line 5 4 4 25

38

EQUIPMENT AND MACHINERY DEMOBILIZED

CONSTANCIA PRESENTATION l 67

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SLIDE 68

Grievance Process

CONSTANCIA PRESENTATION l 68

Closed case

92%

Closed/ Permanent monitoring

3%

Processing

5% 5% Grievance Management

Count of status (percentage)

Grand Total: 337 337

76 52 209

Risk of Harm

Number of complaints and grievances

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SLIDE 69

With Cusco Regional Government and Provincial Municipality of Chumbivilcas

To finance the new Hospital of Chumbivilcas’ feasibility studies

With District of Chamaca

To finance three projects approved as a conclusion of the Dialogue & Development Roundtable

With District of Velille

To support the project “Sierra Productiva” (agricultural sector)

With District of Livitaca

To co - finance the improvement and expansion of the service of basic sanitation, together with the district municipality and the community of Chilloroya, as well as to equip the Technologic Institute of Livitaca

Agreements: Local & Regional Governments

CONSTANCIA PRESENTATION l 69

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SLIDE 70

Ministry of Development & Social Inclusion, and Cusco Regional Government

To fully finance the “Development of Competences for Young People in Chumbivilcas” project, to support them to improve their capacities in the transition stage between secondary education and insertion into the productive world

Ministry of Energy & Mines

To support the delivery of kitchens that use liquefied petroleum gas, and to support the distribution and installation of photovoltaic systems -solar panels- in our area of influence

Ministry of Labor

To cooperate in training, bonding and employability of the vulnerable population in our area of influence, in

  • rder to extend the coverage of the State on employment, employability and entrepreneurship

Ministry of Agriculture

To develop the program of agricultural development in Chumbivilcas, seeking sustainable development promoting and boosting the economy of its inhabitants through the use of modernized irrigation systems, cultivation of pastures, breeding of livestock (cattle and sheep), and implementation of dairy plants

Agreements with National Government

CONSTANCIA PRESENTATION l 70

slide-71
SLIDE 71

Asociación Vida Peru

To manage donations of medicines, medical equipment, educational materials and other goods, and to finance all the logistics that is necessary for the distribution of these goods among the poorest health centers and communities of our area of influence

Universidad Nacional San Antonio Abad del Cusco (UNSAAC)

To jointly develop projects for education and training in cultural and productive research in the area

  • f influence of Constancia, and implement the Hudbay scholarship, the “classroom Hudbay", and

the International Centre for the mining production and regional development

Universidad Nacional San Agustín de Arequipa” (UNSA)

To develop joint education and training projects with the participation and resources that both institutions have to promote professional development, infrastructure improvement, and knowledge exchange, and implement the Hudbay scholarship and the “classroom Hudbay"

Others

In addition to the above mentioned agreements, periodically we carry out medical campaigns and solid waste collection campaigns for the benefit of the population of adjacent districts and communities

Agreements with Other Institutions

CONSTANCIA PRESENTATION l 71

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SLIDE 72

6

Exploration

CONSTANCIA PRESENTATION l 72

slide-73
SLIDE 73

Prolific Belt Provides Opportunities

CONSTANCIA PRESENTATION l 73

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SLIDE 74

Aeromagnetic Survey Map

  • Total Cost: $ 582,194
  • Time: 26 days
  • Area-Km2: 3,197.50
  • Line-Km: 7,219.20

CONSTANCIA PRESENTATION l 74

slide-75
SLIDE 75

Appendix

CONSTANCIA PRESENTATION l 75

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SLIDE 76

Current Schedule

Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4

Permitting Front End Engineering Design Construction Camp Procurement Community Agreements Board Approval Power Line TMF and WRF Plant Commissioning and Ramp Up 2011 2012 2013 2014 2015 Mine Permit

Commercial Production Q2 2015

CONSTANCIA PRESENTATION l 76

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SLIDE 77

Access Road Map

CONSTANCIA PRESENTATION l 77

Hudbay access road Las Bambas access road

slide-78
SLIDE 78

Peru Reserves Overview

Constancia Mineral Reserves

Category Ore (M tonnes) Cu (%) Mo (g/t) Au (g/t) Ag (g/t)

Proven 483 0.32 93 0.040 3.04 Probable 94 0.22 61 0.036 2.77

Pampacancha Mineral Reserves

Category Ore (M tonnes) Cu (%) Mo (g/t) Au (g/t) Ag (g/t)

Proven 23 0.52 142 0.298 4.28 Probable 20 0.44 159 0.252 3.74 As at January 1, 2014

Total Mineral Reserves

Category Ore (M tonnes) Cu (%) Mo (g/t) Au (g/t) Ag (g/t)

Total Proven 506 0.33 95 0.052 3.09 Total Probable 114 0.26 78 0.074 2.94 Total Reserves 620 0.32 92 0.056 3.07

Note: totals may not add up correctly due to rounding

CONSTANCIA PRESENTATION l 78

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SLIDE 79

Peru Resources Overview

Constancia Mineral Resources

Category M (tonnes) Cu (%) Mo (g/t) Au (g/t) Ag (g/t)

Measured 68 0.22 59 0.036 2.17 Indicated 293 0.20 58 0.033 1.96 Inferred 200 0.19 51 0.031 1.86

Pampacancha Mineral Resources

Category M (tonnes) Cu (%) Mo (g/t) Au (g/t) Ag (g/t)

Measured 5 0.41 69 0.243 5.46 Indicated 6 0.34 98 0.211 4.68

Total Mineral Resources

Category M (tonnes) Cu (%) Mo (g/t) Au (g/t) Ag (g/t)

Measured + Indicated 372 0.20 59 0.039 2.09 Inferred 200 0.19 51 0.031 1.86 As at September 30, 2013

Note: totals may not add up correctly due to rounding

CONSTANCIA PRESENTATION l 79

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SLIDE 80

Peru Reserves and Resources Information

For additional details relating to the estimates of mineral reserves and resources at the Constancia project, including data verification and quality assurance/quality control processes refer to “The Constancia Project, National Instrument 43-101 Technical Report” as filed on SEDAR by Hudbay on November 6, 2012.

The Constancia and Pampacancha mineral reserves are based on a Peruvian Sole: US Dollar exchange rate of 2.85:1 and the following long term metals prices: copper price of US$3.00 per pound; silver price of US$25.00 per ounce; gold price of US$1,250.00 per ounce; and molybdenum price of US$13.50 per pound.

The Constancia and Pampacancha mineral resources correspond to a resources pit shell. A pit optimization to delimit the portion of the block model having reasonable prospects for economic extraction was performed.

The Constancia resource pit consists of a non-operational pit of Measured, Indicated and Inferred resources diluted to a 10x10x15m full block size using a 0.12% copper cut-off based on a copper price of US$2.88 per pound and a molybdenum price of US$16.00 per pound, copper recovery of 89%, molybdenum recovery of 60%, processing costs of US$5.50 per tonne and mining costs of US$1.30 per tonne.

The Pampacancha resource pit consists of a non-operational pit of Measured, Indicated and Inferred resources diluted to a 10x10x15m full block size using a 0.1% copper cut-off based on a copper price of US$3.00 per pound, a molybdenum price of US$13.50 per pound, silver price of US$25.00 per ounce, gold price of US$1,250 per ounce, copper recovery of 85%, molybdenum recovery of 40%, gold and silver recovery of 65%; processing costs of US$4.72 per tonne and mining costs of US$1.90 per tonne.

The primary consideration to accommodate the increased Constancia mineral reserve in the Constancia life of mine plan (“LOM”) was the confirmation through pre-feasibility investigation to increase the tailings dam height to accommodate this extra tonnage and the waste rock facility configuration. The resulting LOM has increased to 22 years from 16 years. In this process some of the major cost components have been updated to reflect some known actual costs such as energy, fuel, concentrate transport and port charges. The resulting change is an average cost of US$0.72 per pound of copper produced net of by product credits from a previously disclosed US$0.66 per pound of copper in the first full five years of production. Contained copper metal in concentrate is expected to average 116,000 tonnes per year over the first five full years versus 118,000 tonnes as previously disclosed. Over the remaining years, the cost per pound of copper net of by product credits has increased to US$1.14 per pound from US$1.11 per pound; and the contained copper metal in concentrate is expected to average 67,000 tonnes per year versus 77,000 tonnes per year as previously disclosed. The cost per pound of copper net of by product credits does not include the impact of the precious metals streaming transactions.

Measured and indicated mineral resources were estimated in house. The process includes determination of the integrity and validation of the data collected, including confirmation of specific gravity, assay results and methods of data recording. The process also includes determining the appropriate geological model, selection of data and the application of statistical models including probability plots to establish continuity and model validation.

CONSTANCIA PRESENTATION l 80

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SLIDE 81

Precious Metals Stream Overview

US$750 million in upfront deposit payments from Silver Wheaton for delivery of:

 100% of payable gold and silver from 777 mine until the end of 2016;  and 50% of payable gold and 100% of payable silver thereafter for the remainder of

life of mine

 100% of payable silver from Constancia project  Along with upfront payments, Hudbay will receive US$400 per ounce for gold and

US$5.90 per ounce of silver1 Additional US$135 million deposit payment from Silver Wheaton against delivery of:

 50% of payable gold from the Constancia project  In addition to the deposit payment, Hudbay will receive the lesser of the market

price and US$400 per ounce for gold delivered to Silver Wheaton2 Precious metals stream transaction preserves precious metals upside potential for Hudbay shareholders

 Precious metals production from Lalor excluded  Excludes land package outside of Constancia and Pampacancha, including

Chilloroya

1Subject to 1% annual escalation starting 2015 2 Subject to 1% annual escalation starting 2016

CONSTANCIA PRESENTATION l 81

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SLIDE 82

ACCORDING TO PLAN

CONSTANCIA MINE SITE VISIT September 2014