Tailings Fact Sheet

Fact Sheet Update The tailings pond water is then recycled back into the Following the merger of Newmont and Goldcorp on April milling process for reuse. The tailings are contained within 18, 2019, Newmont Goldcorp has updated the fact sheet the impoundment facility and once it reaches capacity, the providing information on the combined company’s tailings impoundment is reclaimed with a designed cover system storage facilities. The former Goldcorp sites will be managed used to minimize erosion and infiltration, while maintaining under their existing Tailings Stewardship Program, as containment of the materials, protecting the environment described below, until the facilities are fully integrated under and achieving post-mining designated land use. Newmont Goldcorp’s governance model, standards, technical guidelines and operating procedures (expected by mid-2020). Construction Methods Impoundments are designed and constructed to store background both tailings and water. The construction methods include Tailings are created as mined ore is processed into particles two main types of impoundments: (1) water retention of fine sand through crushing, grinding and milling. Mined ore dams and (2) raised impoundments. Water retention is moved to the milling circuit where the rock is reduced into dams are typically constructed to their full height prior to sand and silt sized particles and then mixed with water and anything being stored upstream and raised impoundments moved as slurry through the gold, silver and copper recovery are raised over time to store additional material. Raised process. The valuable minerals are separated from the rest impoundments are the most commonly used method for of the milled rock particles either through physical or chemical tailings storage facilities (TSFs). The raised impoundment recovery processes. After removal of the valuable minerals, design methods for TSFs are typically downstream, the remaining milled rock slurry, now referred to as tailings, upstream or centerline. This designates the direction in is pumped or flows by gravity to an engineered impoundment which the embankment crest moves in relation to the area. starter dam (dyke) and the base of the embankment. Modified centerline is a combination method using both upstream and centerline.

Upstream Construction of an upstream embankment begins with development of a starter dyke. The tailings are then discharged from the dam crest and form the foundation for future raises. Figure 1 shows an overview of the stages of construction.

Raise construction moves upstream of starter dam

Supernatant Pond

Tailings Raise construction moves upstream of starter Starterdam Dam

Supernatant Pond Figure 1: Upstream construction method

Tailings Downstream Starter Tailings storage facility – Gold Quarry, Nevada Dam Downstream methods start with an impervious starter dyke These engineered impoundments are carefully designed, normally with an internalRaise drainage construction system moves downstream as shown of starteron dam constructed and operated to safely contain the tailings Figure 2. The tailings are first deposited behind the dyke Supernatant Pond and water, even during extreme climatic or seismic events. and the embankment is raised overtime. Depending on the chemical characteristics of the tailings and the surrounding environment, the engineered tailings Tailings Raise construction moves downstream of starter dam impoundment will generally be lined with a composite liner system consisting of a low permeability soil liner overlain by a Supernatant Pond Starter Dam geosynthetic liner such as high density polyurethane (HDPE) to prevent impacts to surface and groundwater systems. As the tailings slurry is deposited in the impoundment, the Tailings water separates from the heavier sand and silt particles and collects to form a decant/reclaim pond on the surface of the Starter Dam impoundment. Figure 2: Downstream construction method Supernatant Pond Raise construction moves upward, newmontgoldcorp.com Version 5 - June 2019 centered on the starter dam Tailings

Supernatant Pond Raise construction Starter Dam moves upward, centered on the starter dam Tailings

Starter Dam Tailings FactRaise construction Sheet moves upstream of starter dam page 2 Supernatant Pond

Tailings Starter Centerline Dam and audits, critical controls and strict application of The centerline method combines both upstream and annual inspections by independent qualified geotechnical downstream designs. Unlike the upstream method, where engineers. Newmont Goldcorp’s Environmental Standard for tailings are normally deposited from the crest when raises Closure and Reclamation Management covers the long-term are required, material is placed on both the tailings and the management of tailings impoundment facilities to ensure Raise construction moves downstream of starter dam existing impoundment. The embankment is raised vertically safe and stable conditions. andSupernatant does Pond not move in relation to the upstream and downstream directions of raises as shown on Figure 3. Newmont Goldcorp has both operational and closed tailings Tailings impoundments in a variety of climatic and topographic

This design method oftenStarter Damalso incorporates internal settings. Newmont Goldcorp conducts extensive siting, drainage. Modified centerline is a combination of upstream engineering, environmental and social studies to support and centerline methods and is done to reduce the volume the specific selection and design of each facility. Annually, of construction material that is required to be placed Newmont Goldcorp safely manages and disposes more downstream from the embankment. than 100 million tonnes of tailings that are placed within engineered, surface containment facilities; used to backfill Supernatant Pond Raise construction former mining pits; or placed as structural backfill paste in moves upward, centered on the underground mines. starter dam Tailings Appendix 1 includes an inventory of existing tailings storage facilities at operating and legacy sites outlining Starter Dam the construction method, maximum height and volume of Figure 3: Centerline construction method material.

Deposition Newmont Goldcorp Standards and Guidelines Tailings can be discharged using subaqueous (below water) or Newmont Goldcorp’s Environmental Standard for subaerial techniques. Subaerial deposition is more common Tailings and Heap Leach Facility Management sets the than subaqueous as it forms a sloping beach toward the minimum requirements for the design and management reclaim/decant pond. Subaerial can be done from single or of tailings storage facilities (TSFs) to protect human multiple discharge points and can be rotated around the health, wildlife, flora, groundwater and/or surface water, facility. Subaqueous deposition is normally completed when prevent uncontrolled release to the environment, manage there is a potential for oxidation that could result in mobilized process fluids, and identifies requirements for closure and acid mine drainage. Subaqueous deposition can be completed reclamation. in conventional impoundments, as well as offshore. The standard works in conjunction with other standards Tailings can be dewatered or modified in other ways prior to and incorporates the International Council on Mining and deposition. The current methods include: Metals’ position statement on ‘Preventing Catastrophic · Thickened tailings (which involves a process of dewatering Failure of Tailings Storage Facilities.’ All Newmont Goldcorp to form a low solids content slurry); sites identify, assess and comply with laws, regulations, permits, licenses, external standards and other relevant or · Paste (which includes dewatering until the tailings do not appropriate requirements. https://www.newmontgoldcorp. segregate as they are deposited and have minimal excess com/wp-content/uploads/2019/04/Tailings-and-Heap- water); Leach-Facility-Management-Standard_September-2017.pdf

· Dry stack (includes dewatering to a filtered wet and dry Planning and Design cake that cannot be transported via a pipeline); and · Sites complete a baseline of conditions prior to design of the TSF, including evaluation of land use, hydrology/ · Co-disposal which includes mixing mine waste with hydrogeology, geochemistry, biodiversity, cultural dewatered tailings (other terminology includes co- resources geology, seismicity, soil and visual aesthetics. mingling, co-placement or co-deposition whereby each has slightly different methods of mixing material). · Management plans must be developed to restrict potential releases to the environment.

Newmont Goldcorp’s Tailings Storage · Management plans are expected to include: design and Facilities operating criteria, schedules for inspections, monitoring Newmont Goldcorp’s engineering, construction and operating and maintenance, applicable regulatory, legal or standards and technical guidance explicitly cover tailings other requirements, management methods, risks management and establish requirements to ensure safe assessments, overview of instrumentation including and stable facilities throughout their operating and post- KPIs/critical controls, organization structure (roles and mine closure life. The design, construction and operation responsibilities), training requirements, emergency of all tailings impoundment facilities are scrutinized through response plans (inundation mapping and analysis) and our Investment System process, supported by inspections concurrent reclamation. newmontgoldcorp.com Version 5 - June 2019 Tailings Fact Sheet page 3

· Fluid management plans that describe management of Performance Monitoring solution levels based on the site-wide water balance. The · Tailings impoundments shall be inspected for erosional plan will also identify trigger alert levels and contingency and geotechnical stability, material characterization plans during operations, closure and reclamation phases. (geochemistry and ARD potential), trigger limits and critical controls. · Characterization and specifications for geochemical and physical properties of the construction and tailings · Annual geotechnical reviews are required by a qualified materials. independent senior geotechnical engineer. Independent tailings review boards (ITRB) have been identified based · Engineering requirements for seepage control, liners, on technical, social and political risks identified by and leak collection recovery systems. With excess Newmont Goldcorp leadership and are conducted as a solutions that may require discharge complying with portion of the TSFs on an annual basis. applicable quality and quantity discharge limits based on downstream beneficial use. · Routine inspections to verify integrity and to support maintenance and repair programs as defined in the · Engineering requirements for geotechnical stability monitoring plans. This includes all instrumentation including systems for storm containment and runoff that including piezometers, inclinometers, settlement reduce erosion potential and impact to the containment. points and rate of rise as defined in the monitoring plans. Inspection and maintenance activities are also · Requirements for piezometers to monitor solution completing following events (rainfall, seismic etc.). pressure in the embankments and tailings. Groundwater monitoring wells to establish baseline and monitor Newmont Goldcorp’s Technical Guidelines potential seepage. and Standard Operating Procedures (SOPs) Newmont Goldcorp’s Technical Services team has · Risk-based assessments determine whether the design developed Tailings Facility Geotechnical Guidelines that criteria ensure adequate levels of protection. define minimum requirements for tailings impoundments:

· Quality control and quality assurance protocols are · Definitions for tailings embankments required to document the construction complies with engineering design. · Responsibilities of engineering and management staff

Implementation and Management · Geotechnical input design criteria guidelines for: · All facilities will have critical controls to mitigate significant · Foundation settlement and consolidation risks with risk assessments conducted annually or at · Seismic loading major milestones. · Liquefaction · Hydraulic properties of the foundation, soil liners and · TSF and fluid management plans must be reviewed and drainage layers updated annually. · Water management systems · Tailings rheology and characteristics · Site-wide water balances are updated over the life of the operations to reflect changes in mine plans, processing · Geotechnical process design for: and operations. · Geotechnical field investigations · Laboratory testing · The tailings facilities must be operated within design · Engineering design specifications including piezometer head in embankments and tailings and the management of the pond with design · Geotechnical design requirements for each level of and operational criteria. Project Design

· A closure and reclamation plan shall incorporate the · Risk analysis requirements of the fluid management plan and support stormwater and erosion management while achieving · Quality assurance/quality control post-mining land use.

· The TSF is managed to be protective of the environment and adheres to the requirements of the International Cyanide Management Code, and permit/license/ regulatory requirements as any other legal obligations or voluntary commitments.

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Newmont Goldcorp’s Technical Services team has also Alignment of Goldcorp’s Tailings developed Seismic Design Criteria Guidelines that define Stewardship Program to Newmont minimum requirements for design, construction and Goldcorp’s Standard operation of tailings impoundments to ensure safe and Goldcorp developed a Tailings Stewardship Program stable operations for region-specific seismic events. Each in 2015 as part of a commitment to the safe and operation develops and implements site-specific Standard environmentally responsible development, operation and Operating Procedures (SOPs) and manuals based the tailings management of tailings storage facilities with focus to impoundment design. Site-specific SOPs consist of per reduce risks by ensuring good practices are implemented shift activities including inspections of pipelines, open liner, at all Goldcorp tailings storage facilities and qualifying embankments, pond levels and leak detection systems. water dams. The current program is based on regulatory requirements, incorporates industry best practices Newmont Goldcorp’s Emergency Response and Goldcorp’s desire to be an industry leader in our Planning and Communications sustainability practices. Tailings stewardship is designed All Newmont Goldcorp operations have Emergency to identify issues and concerns, manage liabilities, identify Response Plans that define chain of command and opportunities for operational efficiency, provide input communications and actions to take during emergencies. into design, construction, operation and mine closure, Additionally, Newmont operations have developed site- educate operators, improve data management, provide a specific dam break inundation analysis plans to support standardized review process, and prepare for upsets. emergency planning including communications and evacuation notification. Dam Safety Inspections and risk assessments are updated annually to manage tailings in a manner that effectively In most jurisdictions, Newmont Goldcorp operations also mitigates environmental, public health and safety, and do joint drills and exercises with local emergency response community impacts while maintaining the long-term security teams to prepare for emergencies. It should be noted that of the tailings facility and sustainable land use options. Newmont Goldcorp has contingency plans in place at every Tailings facilities are managed commensurate with the risks operation that describe trigger levels and detailed actions they pose, with the objectives of preventing performance required to prevent overtopping of tailings impoundments. failures and meeting environmental requirements. All solids This includes reporting that is completed on a monthly basis and water are managed within designated areas that meet associated with critical controls. design intent, and tailings management complies with regulatory requirements and conform to sound engineering Newmont Goldcorp’s Audits, Inspections and practice, company standards, tailings management Reporting framework, and commitments to communities of interest Newmont Goldcorp has a number of programs through the including Indigenous groups. Sustainability & External Relations and Technical Services teams for auditing, inspecting and reporting on the stability A work plan has been developed to integrate Goldcorp’s of our tailings facilities. The Technical Services team routinely tailings storage facilities into Newmont Goldcorp’s standards conducts geotechnical reviews with the internal engineering and governance system within 12 months after closing. team and reviews annual inspection reports prepared This will include gap assessments and action to meet the by independent qualified geotechnical engineers and standards, site visits and inspections and implementation of Independent Technical Review Boards. Reporting on tailings critical controls and independent technical review boards for management systems at the corporate level can be found at: all active operations. https://sustainabilityreport.newmont.com/2018/ environmental-stewardship/tailings-waste-and-emissions

To improve understanding of the potential risks associated with tailings storage facility management, potential catastrophic failure was added as an enterprise risk in 2017 at the corporate, regional and site levels. Critical controls are reviewed and reported on a monthly basis at each operation as part of Newmont Goldcorp’s Enterprise Risk Management program.

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Tailings Dam Inventory (Operating Facilities) The tables below include an inventory of the location and size of tailings storage facilities at both operating and legacy sites. The sites shown are owned and operated by Newmont Goldcorp unless otherwise noted.

Mine Site, Location and Construction Area/Storage Most Recent Nearest Town or Ownership Facility Method Capacity/Max Height Inspection Facility Life Status Body of Water · Area – 1,200 · 20 km from the Residue Upstream/ hectares Hotham River Disposal Modified · Storage Capacity – July 2018 2025 Active · 80 km from the Area Centerline 600 Mt North Dandalup Dam Boddington · Max. Height – 68 m (WA Reservoir) WA, Australia · Area – 1,000 hect- · 20 km from the Inactive/ R4 Residue ares Hotham River Care and Disposal Upstream · Storage Capacity – May 2018 n/a · 80 km from the Mainte- Area 60 Mt North Dandalup Dam nance · Max. Height – 27 m (WA Reservoir) · Area – 110 hectares · 10 km to Hannans Fimiston 1 · Storage Capacity – Upstream July 2018 2028 Active Lake TSF 50 Mt · 3 km to Kalgoorlie · Max. Height – 60 m · Area – 350 hectares Inactive/ · 9 km to Hannans Fimiston II · Storage Capacity – Care and Upstream July 2018 2028 Lake TSF 157 Mt Mainte- · 5.5 km to Kalgoorlie · Max. Height – 60 m nance · Area – 240 hectares · 4 km to Hannans · Storage Capacity – Kaltails TSF Upstream July 2018 2028 Active Lake 124 Mt · 8 km to Kalgoorlie · Max. Height – 60 m Inactive/ · Storage Capacity – Care and Gidji I TSF Downstream 2.7 Mt July 2018 2021 · 16 km to Kalgoorlie Mainte- · Max. Height – 30 m nance · Storage Capacity – Gidji II TSF Downstream 1 Mt July 2018 2021 Active · 16 km to Kalgoorlie KCGM · Max. Height – 25 m WA, Australia Joint Venture · Area – 1.6 hectares Inactive/ · Storage Capacity – Care and - Operator Mullingar Uncertain - n/a · 4 km to Kaloorlie 0.13 Mt Mainte- · Max. Height – 8 m nance · Area – 55 hectares Inactive/ · 2 km from Kalgoorlie · Storage Capacity– Care and Mt. Percy Upstream July 2018 n/a and about 1 km from 12.6 Mt Mainte- Ninga · Max. Height – 23 m nance · Area – 18 hectares Inactive/ · 9.5 km from Hannas · Storage Capacity – Care and Paringa Uncertain - n/a Lake and 3.5 km 1.3 Mt Mainte- from Kalgoorlie · Max. Height – 5 m nance · Area – 15.3 hectares Inactive/ · 600 m from · Storage Capacity – Care and Croesus Uncertain 2012 n/a Kalgoorlie but drains 6.4 Mt Mainte- towards Fimiston Pit · Max. Height – 20 m nance Uncertain, · Area – 5.8 hectares Inactive/ mostly · Storage Capacity – Care and · 1.3 km from Old Croesus - n/a encapsulated 3.2 Mt Mainte- Kalgoorie in waste rock · Max. Height – 23 m nance

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· Area – 83 hectares Inactive/ · Storage Capacity – Care and · 260 km to Lake GTD03 TSF Upstream August 2018 n/a 10.5 Mt Mainte- Mackay · Max. Height – 15 m nance · Area – 71 hectares · Storage Capacity Currently Inactive/ – 6.8 Mt (Currently mined Care and · 260 km to Lake GTD01/02 Upstream August 2018 mined for paste for paste Mainte- Mackay backfill) backfill nance · Max. Height – 15 m · Area – 22 hectares Tanami Shoe · Storage Capacity – · 260 km to Lake In-Pit August 2018 n/a Active NT, Australia (GTD04) 1.5 Mt Mackay · Max Height – 6 m

· Area – 38 hectares Inactive/ Quorn · Storage Capacity – Care and · 260 km to Lake In-Pit August 2018 n/a (GTD05) 6 Mt Mainte- Mackay · Max Height – 12 m nance

· Area – 14 hectares Closed/ Bunkers · Storage Capacity – · 260 km to Lake In-Pit April 2017 n/a Rehabili- (GTD06) 0.6 Mt Mackay tated · Max Height – 3 m · Area – 15.5 hectares · Storage Capacity – Closed/ Bullakitchie n/a (no above ground · 260 km to Lake In-Pit 2005 n/a Rehabili- (GTD07) storage) Mackay tated · Max Height – No above ground storage · Area – 52 hectares Modified · Proximity to the Mill · Storage Capacity – Mill1 TSF Centerline/ September 2018 n/a Closed 1 site and the North 22Mt Upstream Area Offices · Max Height – 90 m · Area – 20 hectares · Storage Capacity Currently Inactive/ · 2.8 km to Betze-Post – 16 Mt (Currently mined Care and Pit (onsite) Mill 4/2 TSF Downstream September 2018 mined for paste for paste Mainte- · 11.8 km to North backfill) backfill nance Area Offices (onsite) Carlin · Max. Height – 195 m Nevada, USA · Area – 37 hectares · 12 km from Pine Mill 3 (Rain) · Storage Capacity – Valley Creek Downstream September 2018 n/a Closed TSF 5.4Mt · 0.02 km from · Max. Height – 107 m Ferdelford Creek

· Area – 200 hectares · 9.7 km from Carlin, · Storage Capacity – NV Mill 5/6 TSF Downstream April 2019 2025 Active 150 Mt · 0.8 km from Maggie · Max. Height – 90 m Creek

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Mine Site, Location and Construction Area/Storage Most Recent Nearest Town or Ownership Facility Method Capacity/Max Height Inspection Facility Life Status Body of Water · Area – 90 hectares · 11.3 km to Carlin, NV Mill 5/6 · Storage Capacity – Downstream April 2019 2025 Active · 1.2 km to Maggie West TSF 60 Mt Creek · Max. Height – 64 m · Area – 210 hectares · Storage Capacity – 27 · 11 km to Carlin, NV Mill 5/6 East Carlin Downstream Mt (Currently under April 2019 2025 Active · 0.6 km to Maggie TSF Nevada, USA construction) Creek · Max. Height – 70 m · Area – 32 hectares · Storage Capacity – James Downstream N/A (majority removed September 2018 n/a Closed · James Creek Creek TSF as part of Gold Quarry layback) · Area – 82 hectares · 24.1 km from Battle Downstream/ · Storage Capacity – Mountain Phoenix TSF Modified September 2018 2028 Active 200 Mt · 2.1 km from Willow Centerline · Max. Height – 158 m Creek Phoenix Nevada, USA Lone Tree · Area – 125 hectares · 8.5 km from Valmy Mine Downstream · Storage Capacity – September 2018 n/a Closed · 3 km from Humboldt Section 23 25 Mt River TSF

· 64 km from Modified · Area – 340 hectares Golconda, NV Juniper TSF Centerline/ · Volume – 300 Mt September 2018 2032 Active · 6.4 km from Rabbit Upstream · Max. Height – 73 m Creek Twin Creeks Nevada, USA · Located near Pinion · Area – 58 hectares oxide ore mill greater Pinon TSF Downstream · Storage Capacity – September 2018 n/a Closed than 64 km from 12.3 Mt Golconda, NV

· Area – 710 hectares Merian · Storage Capacity – · 34 km from Java, Suriname, Merian TSF Downstream August 2018 2029 Active 135 Mt Suriname South America · Max. Height – 47 m

LQ Mill · Area – 60 hectares Inactive/ · 5.6 km to Rio Grande Sands · Storage Capacity – Care and Dam Downstream October 2018 2019 Facility 72 Mt Mainte- · 2.3 km to Rio Rejo Yanacocha South TSF · Max. Height – 80 m nance Dam Peru, South America LQ Mill · Area – 40 hectares · 5.6 km to Rio Grande Sands · Storage Capacity – Dam Downstream October 2018 2024 Active Facility 29 Mt · 2.3 km to Rio Rejo North TSF · Max. Height – 80 m Dam

· Area – 160 hectares Akyem · Storage Capacity – · Mamang River Forest TSF Cell 1 Downstream May 2018 2019 Active Ghana, Africa 43 Mt Reserve · Max. Height – 36 m

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Mine Site, Location and Construction Area/Storage Most Recent Nearest Town or Ownership Facility Method Capacity/Max Height Inspection Facility Life Status Body of Water · Area – 100 hectares Downstream/ · Storage Capacity Under Akyem TSF Cell 2 Modified – 43 Mt (under Under construction 2024 construc- · Adjacent to Cell 1 Ghana, Africa Centerline construction) tion · Max. Height – 30 m · Area – 573 hectares · 4.4 km to Kenyasi Downstream/ Ahafo · Storage Capacity – Resettlement Ahafo TSF Modified May 2018 2038 Active Ghana, Africa 166 Mt · 1.3 km to Dokyikrom Centerline · Max. Height – 40 m Village

· Area – 700 hectares Penasquito Presa de · Storage Capacity – · 2 km south to Las Zacatecas, Centerline August 2018 2028 Active Jales 823 Mt Mesas México · Max. Height – 90 m

· Area – 53 hectares Cerro Negro · Storage Capacity – · 19 km west to Rio Santa Cruz, TSF 1 Downstream October 2018 2021 Active 4.3 Mt Pintura Argentina · Max. Height –38 m RLGM - 2020 Campbell South, West, · Area – 110 hectares (dam raise · Nearest community Complex North West Modified · Storage Capacity – planned June 2018 Active is Balmertown, 0.5 Tailings and North Centerline 2.25 Mt to extend km to the Southwest Ontario, Dams · Max. Height – 13.5 m the life to Canada 2024) North, East End, Splitter · Area – 170 hectares Dyke ½, Modified · Nearest community is · Storage Capacity – Primary Centerline/ June 2018 2024 Active Balmertown, 2.5 km RLGM - Red 1.9 Mt Pond and Downstream to the Southwest Lake Complex · Max. Height – 15 m Tailings Secondary Pond Dams Ontario, Canada Cochenour · Area – 100 hectares Inactive/ · Nearest community Wilanour · Storage Capacity – Care and Centerline June 2018 n/ a is Town of Cochenour Complex 4 Mt Mainte- <0.5 km to the North TMA · Max. Height – 7 m nance · Nearest water Centerline/ body - Zeemel Lake Internal · Area – 215 hectares Musselwhite Tailings is approximately upstream · Storage Capacity – Ontario, Discharge July 2018 2029 Active 450 meters from with 32 Mt Canada Dykes toe of dam; 3.4 perimeter · Max. Height – 21 m km northwest to dams Opapimiksan Lake · 5 km to North to · Area – 500 hectares South Porcupine and Dome No.6 · Storage Capacity – 6 km Northeast to Downstream June 2018 2028 Active TMA 305 Mt Porcupine Lake and Porcupine · Max. Height – 33 m 10 km Northwest to Ontario, Timmins Canada · Area – 20 hectares Inactive/ · Nearest community is Downstream, · Storage Capacity – Care and South Porcupine and Broulan Reef June 2018 n/a buttressed 4.8 Mt Mainte- the nearest water is · Max. Height – 20 m nance Porcupine River

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Mine Site, Location and Construction Area/Storage Most Recent Nearest Town or Ownership Facility Method Capacity/Max Height Inspection Facility Life Status Body of Water · Area – 167 hectares Inactive/ · Nearest community is Dome 1, 2 · Storage Capacity – Care and South Porcupine and Upstream June 2018 n/a and 2A – 65Mt Mainte- the nearest water is · Max. Height – 24 m nance Porcupine River

· Area – 38 hectares Inactive/ · Nearest community is · Storage Capacity – Care and Dome #3 Upstream May 2017 n/a Dome Mine Site and 13 Mt Mainte- Timmins · Max. Height – 18 m nance · Nearest community · Area – 38 hectares Inactive/ is Timmins and · Storage Capacity – Care and Dome #4 Upstream May 2017 n/a nearest water body is 3 Mt Mainte- Porcupine River and · Max. Height – 10 m nance Edwards Lake · Nearest community · Area – 9 hectares Inactive/ is Timmins and · Storage Capacity – Care and Dome #5 Upstream May 2017 n/a nearest water body is 1.3 Mt Mainte- Porcupine River and · Max. Height – 8 m nance Edwards Lake · Area – 26 hectares Inactive/ · Nearest community Paymaster · Storage Capacity – Care and is Timmins and Upstream May 2017 n/a North 5.3 Mt Mainte- nearest water body is · Max. Height – 11 m nance Simpson Lake

· Area – 15 hectares Inactive/ · Nearest community Paymaster · Storage Capacity – Care and is Timmins and Upstream May 2017 n/a Porcupine South 2.8 Mt Mainte- nearest water body is Ontario, · Max. Height – 10 m nance Simpson Lake Canada · Nearest community · Area – 215 hectares Inactive/ is Timmins and · Storage Capacity – Care and McIntyre Upstream June 2018 n/a nearest water body is 59 Mt Mainte- Porcupine River and · Max. Height – 5 m nance Clear Water Lake · Area – 125 hectares Inactive/ · Nearest community · Storage Capacity – Care and is Timmins and Pamour T3 Upstream June 2018 n/a 32 Mt Mainte- nearest water body is · Max. Height – 14 m nance Porcupine River · Nearest community is Timmins (Pamour · Area – 69 hectares Inactive/ Pit between) and · Storage Capacity – Care and Pamour T2 Upstream June 2018 n/a nearest water body 38 Mt Mainte- is Porcupine River · Max. Height – 30 m nance tributaries and Three Nations Lake) · Area – 57 hectares Inactive/ · Nearest community is · Storage Capacity – Care and Pamour T1 Upstream June 2018 n/a Timmons (Pamour Pit 6 Mt Mainte- is between) · Max. Height – 15 m nance · Nearest community · Area – 6 hectares Inactive/ is Timmons (Buffalo · Storage Capacity – Care and Ankerite community) Anour A Upstream June 2018 n/a 1.4 Mt Mainte- and the nearest · Max. Height – 14 m nance water body is Porcupine River newmontgoldcorp.com Version 5 - June 2019 Tailings Fact Sheet page 10

Mine Site, Location and Construction Area/Storage Most Recent Nearest Town or Ownership Facility Method Capacity/Max Height Inspection Facility Life Status Body of Water · Nearest community · Area – 8 hectares Inactive/ is Buffalo Ankerite · Storage Capacity – Care and Aunor B Upstream June 2018 n/a community and 2.3 Mt Mainte- nearest water body is · Max. Height – 18 m nance Porcupine River · Nearest community · Area – 16 hectares Inactive/ is Timmins (Delnite · Storage Capacity – Care and Delnite Upstream May 2018 n/a community) and the 3 Mt Mainte- nearest water body is Porcupine · Max. Height – 16 m nance Ontario, Porcupine River Canada · Area – 47 hectares Inactive/ · Nearest community · Storage Capacity – Care and is Timmins and Hallnor Upstream May 2018 n/a 9.1 Mt Mainte- nearest water body is · Max. Height – 11 m nance Porcupine River

· Area – 49 hectares Inactive/ · Nearest community · Storage Capacity – Care and is Timmins and Conniaurum Upstream May 2017 n/a 9 Mt Mainte- nearest water body is · Max. Height – 10 m nance Porcupine River

Note: 1) This table does not include the three facilities that use filtered tailings. a. Currently filtered tailings are mixed with waste rock into the heap leach facility at CC&V, b. Used as paste backfill for our underground operations at Carlin (Nevada) and Tanami (Australia). c. And dry stacked on the waste rock dump at Eleonore (Quebec, Canada)

2) This table does not identify internal dams to the tailings impoundment

3) Tailings storage facilities that are located on non-operated JVs by Newmont Goldcorp are not included in the table newmontgoldcorp.com Version 5 - June 2019 Tailings Fact Sheet page 11

Tailings Dam Inventory (Legacy Sites)

Mine Site and Location Status Number of Dams/Area Most Recent Inspection · Tailings area – 200 hectares Mt. Leyshon · Storage Volume – 48 Mt Reclaimed and closed February 2019 Queensland, Australia · Max. Height – 43 m · 3 tailings facility · Tailings area – 80 hectares Miramar-Con Mine Reclaimed and closed (2 dams · Storage volume – 4.7 Mt June 2018 North West Territories, Canada with water covers) · Max Height – 13 m · 3 tailings facilities · Tailings area – 80 hectares Golden Giant · Storage Volume – 15.3 Mt Inactive with water cover May 2018 Ontario, Canada · Max Height – 38 m · 1 tailings facility In discussions on reclamation requirements; currently area · Tailings area – 61 hectares Empire Mine State has regrown with forest. · Storage Volume – 15.3 Mt Historic Park Facilities are inactive. July 2017 · Max Height – 21 m California, USA · 2 tailings facilities The Sand Dam is owned by the California State Parks

Facility has been left partially open for brine disposal · Tailings area – 60 hectares Battle Mountain Resources – (treatment facility) and for · Storage Volume – 1.4 Mt San Luis Mine August 2018 management of water during · Max Height – 47 m Colorado, USA plant upset conditions. Facility · 1 tailings facility is inactive.

· Tailings area – 40 hectares Idarado Mining Co · Storage Volume – 17 Mt Reclaimed and closed September 2018 Colorado, USA · Max Height – 30 m · 6 tailings facilities and 1 buried · Tailings area – 14 hectares Resurrection Mining Co – · Storage Volume – approx... California Gulch Reclaimed and closed 1 Mt September 2018 Colorado, USA · Max Height – 29 m · 3 tailings facilities · Tailings area – 54 hectares Resurrection Mining Co – · Storage Volume – 1.4 Mt Black Cloud Mine Reclaimed and closed September 2018 · Max Height – 29 m Colorado, USA · 1 tailings facility · Tailings area – 73 hectares · Storage Volume – 7.2 Mt · Max Height – 9 m Inspections as part of ongoing Dawn Mill/Midnite Mine Reclaimed and closed · 1 Tailings facility was construction activities – no formalized Washington, USA constructed below grade. external inspections There other facility has a small disposal area above ground. · Tailings area – 45 hectares Inactive/care and maintenance. Marlin · Storage Volume – 22.5Mt Ongoing closure - cover August 2018 San Marcos, Guatemala · Max Height – 82.5 m placement · 1 tailings facility

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Tailings Dam Inventory (Legacy Sites)

Mine Site and Location Status Number of Dams/Area Most Recent Inspection · Tailings area - 138 hectares Equity · Storage Volume - 72 Mt Inactive with water cover August 2018 British Columbia, Canada · Max Height – 61 m · 1 tailings facility · Tailings area – 28.6 hectares Dona Lake · Storage Volume - 1 Mt Inactive, care and maintenance February 2016 Ontario, Canada · Max Height – 15 m · 1 tailings facility

Note: 1) For legacy facilities inactive is defined as no longer having deposition activities.

2) Reclaimed and closed refers an inactive dam that has been closed with the placement of a water or soil cover, revegetation and construction of water management structures.

3) The sites with water covers designed for closure and management of acid rock drainage have been defined. newmontgoldcorp.com Version 5 - June 2019