Iamgold Corporation · TSX:IMG

Iamgold — Technical Presentation (September 2017)

36 slides from Iamgold's technical presentation, Sep 12, 2017

1. Slide 1: Saramacca Project Updates

   Saramacca Project Updates September 2017 Suriname Exploration Team September 12th, 2017 “ TSX: IMG NYSE: IAG

2. Slide 2: Qualified Persons & Technical Information

   Qualified Persons & Technical Information The mineral resource estimate, including verification of the data disclosed, has been completed by SRK Consulting (Canada) Inc (“SRK”) and reported in accordance with NI 43-101 requirements and CIM Estimation Best Practice Guidelines. The resource estimate w

3. Slide 3: Consolidating Prospective Land Packages Around Rosebel

   Consolidating Prospective Land Packages Around Rosebel 3

4. Slide 4: Location Map (combined satellite and Lidar)

   Location Map (combined satellite and Lidar) Headley’s Reef Concession Rosebel Mine A new gold trend emerging Thunder Mountain Sarafina Concession Concession Pit Gold showing Concession Boundary Saramacca Concession 5 km Saramacca Resource 4

5. Slide 5: Gold-rich drainages

   drainages Gold-rich Rosebel 25km Some drill pads 5

6. Slide 6: Saramacca - 2016/2017

   Saramacca - 2016/2017 Activity Q4 -2016 Q1- 2017 Q2- 2017 Q3- 2017 Q4- 2017 Drilling * Validation Confirmation drilling Initial Infill and (50m x 50m) Resource peripheral * Foot print 180 DDH (34,126m) Estimate drilling (100m x 50m) 37 RCH (4519m) Other LIDAR Geological and regolith mapping, VTEM Ex

7. Slide 7: Saramacca Mineralization

   Fault Zone N Saramacca Mineralization Gold mineralization associated with a major brittle-ductile vertical Pillowed Basalt fault zone located at the contact between a massive and pillowed basalt units Multiple mineralized structures with main fault and associated sub parallel shear zone within corri

8. Slide 8: Geological Setting

   Geological Setting ® 545000 es Legend © DDH * RC Ore Zone HS Massive Basalt MM Amygdular Basalt BS Pillowed Basalt 677000 678000 679000 680000

9. Slide 9: Highlights of 2017 Drilling

   Highlights of 2017 Drilling SMDD17-084 20m @ 4.26g/t Au 19.5m @ 9.66g/t SMDD17-133 45.4m @ 2.38g/t Au SMDD17-074 32.6m @ 4.05g/t Au 17.8m @ 6.65g/t Au SMDD17-130 N SMDD17-079 46.5m @ 3.07g/t Au SMDD17-166 16.8m @ 7.04g/t Au 34.5m @ 2.23g/t Au* SMDD17-077 SMDD17-122 60.5m @ 40.9g/t Au 15.0m @ 5.45g/t

10. Slide 10: Location of section 1700NW

    Location of section 1700NW N 10

11. Slide 11: Faya Bergi

    SMDD16-011:8.5m @ 5.35g/t SMDD16-042: 55.5m @ 1.99g/t Supergene enrichment SMDD16-011: 33.0m @ 2.22g/t SMDD16-011: 18.0m @ 5.44g/t SMDD17-074:10.5m @ 1.44g/t 100m SMDD17-156: 29.5m @ 1.02g/t SMDD16-002: 22.5m @ 2.79g/t SMDD17-002: 17.7m @ 2.51g/t SMDD16-002: 13.5m @ 3.24g/t SMDD16-002: 18.0m @ 5.35g

12. Slide 12: Mineral Resource Statement – Saramacca (as at August 28, 2017)

    Mineral Resource Statement – Saramacca (as at August 28, 2017) Cut-off Weathering Tonnage Grade Contained Au Category Grade Zone (‘000 t) (g/t Au) (koz) (g/t Au) Laterite 0.25 2,372 1.20 91 Indicated Saprolite 0.25 5,573 2.43 436 Transition 0.35 2,526 2.17 176 Fresh 0.45 3,973 2.49 318 Total Indicat

13. Slide 13: Cross Section 1700NW – Gold Grade Block Model

    Cross Section 1700NW – Gold Grade Block Model Gold in Surface Laterite/Duricrust Saprolite Surface Fault Zone HW Shear Zones 100m Cross Section (looking northwest) OPEN down Plunge (u/g potential) 13

14. Slide 14: Longitudinal Section (looking NE) – Gold Grade Block Model

    Longitudinal Section (looking NE) – Gold Grade Block Model Continuous Envelope of lower grade mineralization along Fault Zone with Higher Grade “Shoots” SE NW Open Fault Zone SMDD16-47 Higher grade shoots presenting exploration Longitudinal Section targets at depth VG (looking northeast) 100m 14

15. Slide 15: Pit Constrained Longitudinal Block Model Section (looking NE)

    Pit Constrained Longitudinal Block Model Section (looking NE) 1500$ pit shell SRK Potential to increase the resources at depth and laterally 15

16. Slide 16: Conceptual Pit

    Conceptual Pit Pit Optimization Parameters • Pit slopes: 30 – 45° (sap to fresh) N • Metal Recoveries (%): 97 (sap), 76(trans), 82 (fresh) • Mining: 95% mining recovery, 5% dilution Optimized Pit Shell 16

17. Slide 17: Conceptual Pit - Gold Price Sensitivity

    Conceptual Pit - Gold Price Sensitivity 17

18. Slide 18: Additional Exploration Targets

    MODD14-06 Tigri prospect from 103: 10.5m @ 1.32g/t Au (Sarafina Additional Exploration concession) Targets MODD14-02 MODD14-07 From 53.25: 12m @ 2.89 g/t Au From 117: 4.5m @ 3.07 g/t Au Extensive SSM workings in drainages from both topo highs MOTR16-11 from 48: 26m @ 2.66g/t Au Poorly tested soil an

19. Slide 19: Next Steps

    Next Steps 1. Increase confidence in resource; convert Inferred to Indicated 2. Expand existing resource along known mineralized trends 3. Evaluate additional exploration targets 4. Q4: ~20,000 metres of diamond and RC drilling in progress 19

20. Slide 20: Plan view of proposed drilling programme for Q3-Q4

    Plan view of proposed drilling programme for Q3-Q4 Preliminary waste Expansion dump outline drilling Exploration drilling Condemnation drilling (RC) to be done in two phases Preliminary pit outline 3 Exploration Several holes with fences (RC) multi objectives; test under explored min Drilling type (

21. Slide 21: Thank you

    Looking to the West and… and to the Future Thank you Saramacca Exploration camp 21

22. Slide 22: Saramacca Project Development

    Saramacca Project Development Saramacca Project Development Martin Beausejour Project Manager Mining September 12, 2017

23. Slide 23: Location Map (combined Lidar)

    Location Map (combined Lidar) Headley’s Reef Concession Sarafina Concession 25 km in plan Saramacca Concession 23

24. Slide 24: Saramacca Project Objective

    Saramacca Project Objective  Saramacca is an opportunity with the Rosebel soft ore depleting  Saramacca Mine could potentially provide soft Mill feed (2-4M tonnes/year) to blend with the Rosebel hard rock feed (8-9M tonnes/year) from 2019 and beyond to maximize Mill throughput and revenue  Delive

25. Slide 25: Operation Philosophy

    Operation Philosophy  Saramacca will be a satellite mine to Rosebel  Maximize synergy with Rosebel (maintenance, warehouse, site services, etc.)  Minimize infrastructure (capex)  Dedicated mining fleet at Saramacca with Rosebel still in full production  Ore processed through existing Rosebel mi

26. Slide 26: Scope of Work 2017

    Scope of Work 2017  Complete ESIA and issue report to NIMOS  Manage permitting to get exploitation rights in H1 2018  Complete the internal scoping study  Complete ore haulage trade-off study  Do study execution plan towards feasibility  Scope required field investigations and characterization

27. Slide 27: Progress to Date

    Progress to Date  43-101 resources estimate  Preliminary economics on ore haulage options  Preliminary study on railway  Lidar survey of ore haulage corridor  Preliminary metallurgical study completed  Crusher mobilized to crush haulage corridor aggregates  ESIA in progress  Permitting in pr

28. Slide 28: Potential Early Activities

    Potential Early Activities  Tree harvesting and land clearing  Road/track construction to Saramacca  Camp construction for workforce (location Saramacca vs Rosebel)  EPC for power (generators and electrical distribution)  Procurement of mining equipment  Procurement of hauling system 28

29. Slide 29: Internal Scoping Study

    Internal Scoping Study  Scoping study objective  Give a high level and global picture to management  Get approval for the next stage which is feasibility  Determine the project scope, budget and schedule  Internal scoping study will be conducted from September to December 2017  Areas of evalua

30. Slide 30: Ore Haulage

    Ore Haulage  Ore will be hauled from Saramacca to Rosebel process plant, approximately 25 km  Requirement of 230 to 460 tph  Recent resources will be used for further evaluation  After internal preliminary comparison, 2 preferred options:  Conventional road trucks  Railway  Trade-off (third p

31. Slide 31: Metallurgy

    Metallurgy  Preliminary metallurgical test work done:  9 composites from Saramacca drill core interval  Grade ranging from 0.7 to 7.7 g/t  Early recoveries:  Saprolite 97.0 %  Transition 76.0 %  Hard rock 82.0 %  Laterite must be tested in next metallurgical test work  Need further:  Ore c

32. Slide 32: Potential Infrastructure Requirements

    Potential Infrastructure Requirements  Small maintenance shop  Explosive magazines  Lunch room  Telecom tower  Generators  Security infrastructure  Fuel tanks  Fueling station  Small office  Small warehouse  Camp for workers (Saramacca vs Rosebel)  First aid station 32

33. Slide 33: Potential Equipment Requirements

    Potential Equipment Requirements  Mining equipment  Ore haulage equipment  Road maintenance equipment  Field maintenance equipment  Light vehicles 33

34. Slide 34: Next Steps - Permitting

    Next Steps - Permitting Target Objective Date Establish operative UJV agreement - Accounting manual Step - Power plan agreement Q4’17 1 - Ore transport and mill configuration studies Complete Environmental and Social Impact Study (ESIA) - Social baseline studies Step - Environmental management plans

35. Slide 35: Next Steps – Project Development

    Next Steps – Project Development  Conduct geotechnical, hydrogeology and geochemical drilling campaign  Award scoping study firm  Build integrated project team  Kick-off scoping study  Start mine design and planning with resources BM  Start ore haulage trade-off  Implement project controls 

36. Slide 36: Thank you!

    Thank you! £1AMGOLD CORPORATION

IAMGOLD — Technical Presentation (September 2017) on 6ix