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Capstone Reports First Quarter 2020 Results

Financials

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April 28, 2020

Capstone Reports First Quarter 2020 Results

(All amounts in US$ unless otherwise specified)

Vancouver, British Columbia - Capstone Mining Corp. (“Capstone” or the “Company”) (TSX:CS) announces its

production and financial results for the three months (“Q1 2020”) ended March 31, 2020. Copper production

totaled 35.5 million pounds of copper at consolidated C1 cash costs1 of $2.05 per payable pound produced.

“I am proud of Capstone’s response to the COVID-19 pandemic. Our top priority is to ensure the health of our

employees and our communities in which we operate, while maintaining the health of our business,” said Darren

Pylot, President & CEO of Capstone. “Our quick mitigation measures positioned Capstone to weather this current

low copper price environment without delaying the 2021 growth targets we have set.”

“We were well positioned to face the abrupt economic downturn during Q1 2020, having cut nearly $30 million in

annual costs from the business last year,” said Raman Randhawa, SVP & CFO of Capstone. “We were fortunate

to have the flexibility to defer another $32 million in capital costs this year, while having preserved multiple levers

that could be triggered to increase liquidity, if necessary. Also, we have taken actions on additional operating cost

savings of $22 million which include locking in contract purchases and hedges on very low diesel prices,

transportation and the Mexican Peso for the remainder of 2020. This is expected to result in consolidated C1

operating costs and all-in sustaining costs of ~$1.80 and ~$2.20 per pound, respectively, for the balance of this

year.”

COZAMIN UPDATE

On April 7, the Company safely commenced ramping down operations at Cozamin to comply with a Mexican

Federal Government decree which was extended from April 30, 2020 to until May 30, 2020. The decree allows for

normal operations to resume on May 18, 2020 in municipalities which present low or null transmission of COVID -

19. Zacatecas is a low-risk jurisdiction based on current statistics. The Company is taking all steps necessary to

be able to quickly and safely ramp production back up to full capacity by May 18, 2020.

Q1 2020 HIGHLIGHTS AND SIGNIFICANT ITEMS

• Q1 2020 copper production of 35.5 million pounds and C1 cash costs1 of $2.05 per payable pound

produced. Copper sales were lower at 30.4 million pounds due to timing of shipments at Pinto Valley.

• Q1 2020 net loss of $21.9 million impacted significantly by two items, non-cash inventory write-downs ($6.7

million) and provisional pricing adjustments ($9.8 million) related to COVID-19. (Q1 2019 – net income of $8.3

million).

• Q1 2020 operating cash flow of $6.9 million (Q1 2019 of $28.7 million). Operating cash flow was impacted

by approximately $10 million due to one less shipment at Pinto Valley and the build-up of concentrate

inventory during Q1 2020.

• In January and April, Cozamin further announced the results from its 2019/2020 step-out and infill

drilling program, aiming to double the current reserve base. 177 holes of the 200 planned holes are now

released, with updated Mineral Resource and Mineral Reserve estimates expected in late 2020. Positive drill

results are pointing to expected higher grades and wider intercepts than in the current reserve, as well as a

potentially expanded high-grade resource.

• A positive update to Santo Domingo’s Feasibility Study was released in February. The update included

a higher level of capital and operating cost certainty, the receipt of additional key permits and the

development of a Preliminary Economic Assessment with respect to cobalt production.

• The World Health Organization declared the coronavirus (COVID-19) a global pandemic in early March.

Capstone has taken the following measures in response to COVID-19; refer to the Corporate Update

below for more details:

Suite 2100 – 510 West Georgia Street

Vancouver, BC, V6B 0M3, Canada

Tel: 604-684-8894 Fax: 604-688-2180

www.capstonemining.com

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o Implemented rigorous control and prevention measures in order to ensure the health of our

workers at all our offices and operations.

o Safely ramped down operations at Cozamin on April 7, to comply with a government decree.

o Withdrew its full-year 2020 production guidance, due to Cozamin’s temporary ramp down of

operations and the ongoing uncertainty regarding COVID-19. The Company will re-evaluate its full-

year 2020 guidance as the pandemic evolves.

• 2020 cost reduction actions taken to manage liquidity and deliver margins:

o Reduced discretionary capital and exploration expenditures by $32 million.

o Actions taken by management to reduce operating costs for the remainder of 2020 by $22

million. These reductions include lower diesel prices and transportation costs, hedging foreign

exchange and interest rate swaps.

o Operating cost reductions are expected to reduce C1 cash costs to $1.75/lb to $1.85/lb thus

delivering margins at spot copper prices.

o Executed financial hedges on foreign exchange and interest rates to protect approximately half

of the Company’s Mexican Peso exposure from August 2020 through December 2021 and swapped

the floating for fixed rate on the LIBOR portion of our revolving credit facility (RCF) at 0.355%.

Resulting in estimated expected savings against plan of $4 million and $4 million respectively

over the term of the contracts.

CORPORATE UPDATE

COVID-19

In response to the World Health Organization declaring novel coronavirus (COVID-19) a global pandemic in early

March, Capstone has taken the following measures to ensure the health and safety of our people and the

communities in which we operate:

o We have a global COVID-19 response team in place and are assessing any potential health and

business impacts across all our operations.

o Implemented rigorous control and prevention measures at all our offices and operations in order to

ensure the health of our workers, including remote working from home where possible and limiting all

non-essential travel.

o In response to COVID-19 negatively affecting global markets and putting downward pressure on

metal prices, Capstone has taken prudent financial measures to reduce discretionary capital and

exploration expenditures by $32 million in 2020.

o The Company’s financial position as at December 31, 2019 was at a position of strength with low net

debt/EBITDA of 1.56x, net debt of $165 million and total available liquidity of $135 million consisting

of $90 million undrawn on the revolving credit facility (“RCF”) plus cash and short -term investments of

$45 million. As at March 31, 2020, the Company had total available liquidity of $112 million consisting

of $80 million of undrawn credit on the RCF and cash and short-term investments of $32 million.

Subsequent to quarter-end, the Company drew $30 million on the RCF as a precautionary measure

for working capital purposes. The Company is closely monitoring future cash flow projections to

ensure that we can take appropriate further actions as required.

o On April 7, the Company safely commenced ramping down operations at Cozamin to comply with a

Mexican Federal Government decree which was extended from April 30, 2020 to until May 30, 2020.

The decree allows for the normal operations to resume on May 18, 2020 in municipalities which

present low or null transmission of COVID-19. Zacatecas is a low-risk jurisdiction based on current

statistics. The Company is taking all steps necessary to be able to quickly and safely ramp production

back up to full capacity by May 18, 2020.

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2020 Cost Reductions

At the end of December 2019, the Company achieved its target of sustainable annualized cost savings of $27.5

million from the business, using 2018 as a baseline.

In response to COVID-19, Capstone has taken prudent financial measures to reduce discretionary capital and

exploration expenditures by $32 million in 2020.

In addition, in relation to current financial markets, the Company is targeting the following cost reductions in 2020

expected to be reflected in our future operating results. These are additional cost saving measures which would

enable Capstone to reduce our cash operating costs by approximately $22 million over the remainder of 2020.

Operating Cost Items Projected Annualized

Cost Savings

($ million)

Projected 2020 Savings

(Q2 to Q4)

($ million)

Diesel $10 $8

Transportation costs $3 $2

Contractor management freeze $4 $3

Consumables and other inputs costs $4 $3

Mexican peso @ 24.00 versus guidance 19.50 $5 $4

Canadian dollar @ 1.40 versus guidance 1.30 $1 $1

Fixed interest rate swap $1 $1

TOTAL $28 $22

Pinto Valley Cost Reductions

As a result of these cost reduction

measures and expected improvements to

production compared to Q1 2020

(primarily related to grades reverting back

to average of 0.31% copper), we expect

the C1 cash costs1 for Pinto Valley to

reduce dramatically in the remaining

quarters in 2020, compared to Q1 results,

to below $2.00/lb. This is a result of the

following key factors illustrated in the

waterfall chart. (Refer to the Risks and

Uncertainties section in Capstone’s Q1

2020 Management’s Discussion and

Analysis (“MD&A”) and Financial

Statements for updated COVID-19 related

risks.)

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Pinto Valley: PV3 Optimization

PV3 Optimization is an initiative that aims to enhance performance via a series of low capital, quick payback, high

impact debottlenecking steps and operational tweaks. The goal is to sustainably boost throughput, enhance

recovery and lower costs. All required permits are in place to operate at levels up to 79,500 tonnes per day.

The first phase of PV3 Optimization aims to increase reliability and improve performance in the fine crushing plant

and grinding circuit (“Phase 1”). In Q1 2020, the first of two secondary crushers and screen decks arrived and are

scheduled to be installed in July. Also in July, the first of two new ball mill shells are expected to be installed, with

the second scheduled for Q1 2021. The second secondary crusher and six tertiary screen decks are scheduled to

arrive in Q4 2020. Once completed, the expected result is for throughput to reliably achieve higher throughput

levels in the 56,000 to 57,000 tonnes per day range in 2021. During Q1 2020, a mineral processing consultant

was hired to assist in reviewing historical reports and operational data and identify operational improvements to

advance in the short term (“Phase 2”).

Pinto Valley: PV4 Expansion

Preliminary work on Pinto Valley’s potential future expansion to 100,000+ tonnes per day (“PV4 Expansion”)

continues but at a slower rate given COVID-19 restrictions. The update has been delayed for an indeterminate

period. The study is focused on evaluating potential scenarios to take advantage of the one billion tonnes of

Mineral Resources not currently scheduled in the current mine plan pit shell (“PV3”).

Cozamin: Near-Term Expansion Update

In early April 2020, Cozamin completed two major projects that represent a significant achievement on our path to

expanding copper and silver production in 2021. The final key component of this expansion, the Calicanto one-

way ramp, continues as scheduled and on budget to be completed in December 2020. ( Refer to the Risks and

Uncertainties section in Capstone’s Q1 2020 MD&A and Financial Statements for updated COVID-19 related

risks.) The 818-meter raisebore was completed 52 days ahead of schedule, which immediately improved

ventilation and decreased the temperature in the deepest area of the mine. The second milestone is completion of

an upgrade to the underground electrical substation, to boost the mine from 7 .5MW to 9.5MW. In addition, an

additional underground maintenance shop has been completed, increasing fleet maintenance capacity by 50%.

Once completed, the underground expansion is expected to increase production to a new annual run rate of

approximately 50-55 million pounds of copper and 1.5 million ounces of silver in 2021.

Cozamin: Targeting Doubling Mine Life

Updated Mineral Resource and Mineral Reserve estimates for Cozamin are still expected to be completed in late

2020. The 2019/2020 step-out and infill drilling program was progressing well at 85% completed and

approximately three months ahead of schedule, until it was suspended as a non- essential activity by Mexican

national decree. The drilling completed to date will be used to upgrade Inferred Mineral Resources to the

Indicated category and subsequent conversion to Mineral Reserves to target doubling the mine life. Positive drill

results pointing to higher grades and wider intercepts than in the current Mineral Reserve estimates were

released on January 16, 2020 and April 23, 2020.

Santo Domingo Technical Report Update

In February 2020, a positive update to Santo Domingo’s Feasibility Study-level Technical Report, originally

published on January 3, 2019 (“Base Case”), was released on February 19, 2020 and filed on SEDAR on March

24, 2020. The update included a higher level of Capital (“CAPEX”) and Operating Cost (“OPEX”) certainty, receipt

of additional key permits and the development of a Preliminary Economic Assessment with respect to cobalt

production (the “2020 PEA Opportunity”). Highlights included:

• Higher level of CAPEX/OPEX certainty due to confirmation of certain capital and operating costs with the

negotiation of a power purchase agreement, indicative offers for desalinated water purchas e from third

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parties, firm-fixed-price (lump sum) proposal for the construction of plant and mine facilities and firm

actionable quotes for key process equipment.

• Base Case copper-iron-gold project has a post-tax net present value at an 8% discount rate (“NPV8%”) of

$1.03 billion. Initial construction costs are estimated to be $1.51 billion which incl udes a $197 million

contingency on total costs.

• The 2020 PEA Opportunity considers a conceptual plan to mine and process copper, iron- ore and gold at the

onset of the mine. Subsequent to the decision of building the copper-iron-gold mine, a follow-on phase to

initiate engineering and permitting is presented for a cobalt recovery circuit. The 2020 PEA Opportunity

assumes two years for additional permitting and detailed engineering. During this development period, the

cobalt laden pyrite will be stockpiled as a high-density slurry. Copper, iron and gold are mined for the 18-year

mine life and processed over 18 years, and cobalt is mined for 18 years but processed o ver the last 16 years.

o The copper-iron project with the phased cobalt opportunity has a NPV8% of $1.66 billion after tax.

o Incremental CAPEX for a cobalt refining complex of $0.67 billion, for combined construction costs of

$2.18 billion, timed to begin two years after construction begins for the copper-iron-gold plant.

o Production of an average of 10.4 million pounds of cobalt per annum in the form of 22,600 tonnes per

annum (“tpa”) battery-grade cobalt sulfate, at incremental operating costs of $3.70 per pound of

cobalt production costs and incremental C1 cash costs1 of negative -$4.11 per pound of cobalt

production (including by-product sulfuric acid produced in the cobalt operation).

OPERATIONAL OVERVIEW

Refer to Capstone’s Q1 2020 MD&A and Financial Statements for detailed operating results.

Q1 2020 Q1 2019

Copper production (million pounds)

Pinto Valley 26.8 32.7

Cozamin 8.7 8.7

Total copper production (million pounds) 35.5 41.4

Copper sales

Total copper sales (from continuing operations)2 (million pounds) 30.4 35.3

Realized copper price ($/lb.) $2.29 $2.99

C1 cash costs1 ($/lb.) produced

Pinto Valley $2.41 $1.79

Cozamin $0.95 $0.70

Consolidated C1 cash costs1 ($/lb.) produced $2.05 $1.56

1 This is an alternative performance measure; please see "Alternative Performance Measures" at the end of this release.

2 Sales from continuing operations has been utilized due to the Minto mine being classified as a discontinued operation in the comparative

period until the point of its sale on June 3, 2019.

Consolidated

Production of 35.5 million pounds was at the lower end of the original guidance range of 140 to 155 million pounds.

Production levels are expected to ramp up through the year as Pinto Valley mined a lower grade area of the upper

portion of the pit during t he quarter. A focus on maximizing mill throughput continued in Q1 2020 following the

successful December 2019 operational test, announced with the 2019 results in February 2020. A total of 28 days

of over 60,000 tonnes per day was realized during Q1 2020 and an average daily throughput rate during Q1 2020

of 54,900 tonnes per day, or approximately 5% higher than the three-year average from 2017 to 2019. Sustainable

high mill throughput rates are expected in the second half of 2020, helped by the installation of the first of two

secondary crushers and screen decks planned for July 2020. Recoveries during the quarter of 82.4% were impacted

by the low feed grade of 0.284% plus an expected higher than average oxide component. Grade and recovery are

both planned to be higher for the balance of the year.

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C1 cash costs1 were impacted by Pinto Valley costs, overall lower production and less capitalized stripping resulting

from the increased ore delivery to the mill.

The realized copper price in Q1 2020 of $2.29 per pound was lower than the LME average of $2.56 per pound due

to three provisionally priced shipments at March 31, 2020, which were priced at an average of $2.24 per pound. In

addition, there was a ($0.10) per pound negative provisional adjustment on prior shipments due to copper prices

decreasing throughout the quarter. Sales volumes in Q1 2020 were lower than production due to timing of shipments

at Pinto Valley.

Pinto Valley Mine

C1 cash costs 1 of $2.41 per pound in Q1 2020 were higher than Q1 2019, primarily due to 18% lower copper

production compared to the same period last year, as well as higher operating costs (site cos ts were $56 million in

Q1 2020 compared to $216 million in 2019 or a run rate of $54 million per quarter). C1 cash costs 1 were also

impacted by lower capitalized stripping in Q1 2020 of $5.3 million or $0.20 per pound.

Property cost per tonne milled1 of $10.87 was $0.30/tonne lower (-3%) versus the average cost per tonne milled in

2019 and $0.76/tonne lower (-6.5%) than in 2018. This reflects the cost cuts implemented over the course of last

year.

During Q1 2020, the mill was able to achieve mill throughput of 54,899 tonnes per day (highest quarterly total since

Q4 2017) as a result of operational improvements tied to maintenance programs.

Cozamin Mine

Production in Q1 2020 remained consistent at Cozamin compared to Q1 2019. C1 cash costs 1 of $0.95 per pound

were higher than Q1 2019. The primary cause of this is a decrease in by -product credits during the quarter due to

declining commodity prices as a result of current market conditions, as well as less San Rafael zinc ore mined

during the quarter. This was offset by decreases in overall operating costs from cost management efforts, as well

as lower treatment and selling costs.

FINANCIAL OVERVIEW

Refer to Capstone’s Q1 2020 MD&A and Financial Statements for detailed financial results.

Q1 2020 Q1 2019

Revenue2 ($ millions) 70.4 108.9

Net income (loss) ($ millions) (21.9) 8.3

Adjusted net income (loss)1 ($ millions)3 (17.7) 12.0

Adjusted EBITDA1,4 from continuing operations2,3 ($ millions) 11.1 35.6

Cash flow from operating activities2 ($ millions) 6.9 28.7

Operating cash flow before changes in working capital1,2 ($ millions) (3.5) 30.7

March 31,

2020

December 31,

2019

Total assets ($ millions) 1,309.9 1,331.4

Long term debt (excluding financing fees) ($ millions) 219.9 209.9

Net debt1 ($ millions) 188.0 165.5

1 This is an alternative performance measure; please see "Alternative Performance Measures" at the end of this release.

2 In accordance with IFRS 5, Minto’s results are excluded from revenue but included within cash flow amounts in the comparative period.

The Minto mine was sold on June 3, 2019.

3 Certain prior period amounts have been restated to conform with current period classification.

4 EBITDA is earnings before interest, taxes, depletion and amortization.

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OUTLOOK – 2020 PRODUCTION, COST AND CAPITAL GUIDANCE

In light of the temporary ramp-down at Cozamin to comply with a Mexican Federal Government decree which was

extended from April 30, 2020 to until May 30, 2020, and the ongoing uncertainty regarding COVID -19, Capstone

has decided to withdraw its full-year 2020 production guidance. The Company will continue to target safe

execution of its operation plans and will re-evaluate its full-year 2020 guidance as the pandemic evolves.

Prior to the temporary ramp-down at the Cozamin mine, Capstone had taken prudent financial measures, due to

the recent drop in copper prices, to reduce discretionary capital and exploration expenditures of $32 million in

2020, as shown in the table below. The Company does not expect that these reductions will materiall y impact its

growth plans for 2021 and beyond.

Refer to the Corporate Update section for revised 2020 operating cost expectations.

2020 Expenditure Guidance Original Guidance Revised Guidance

Pinto Valley

Sustaining $28 $18

Capitalized stripping $8 $3

Expansionary $19 $12

Total Pinto Valley Capital $55 $33

Cozamin $26 $24

Santo Domingo $93 $64

Total Capital $90 $63

Total Exploration $10 $5

3 On a 100% basis, the figure is $12 million; ownership is 70% Capstone and 30% Korea Resources Corporation.

4 On a 100% basis, the figure is $9 million; ownership is 70% Capstone and 30% Korea Resources Corporation.

CONFERENCE CALL AND WEBCAST DETAILS

Date: Wednesday, April 29, 2020

Time: 11:30 am Eastern Time (8:30 am Pacific Time)

Dial in: North America: 1-877-823-8676, International: +825-312-2240

Webcast: https://event.on24.com/wcc/r/2218097/7C9FE2184A36B0D28729C5A8FBF1B50B

The conference call replay will be available until May 13, 2020.

Replay: North America: 800-585-8367, International: +416-621-4642

Passcode: 5215689

Following the replay, an audio file will be available on Capstone's website at

https://capstonemining.com/investors/events-and-presentations/default.aspx.

This release is not suitable on a standalone basis for readers unfamiliar with Capstone and should be read in

conjunction with the Company’s MD&A and Financial Statements for the three months ended March 31, 2020,

which are available on Capstone’s website and on SEDAR, all of which have been reviewed and approved by

Capstone's Board of Directors.

1 This is an alternative performance measure; please see "Alternative Performance Measures" at the end of this release.

ABOUT CAPSTONE MINING CORP.

Capstone Mining Corp. is a Canadian base metals mining company, focused on copper. We are committed to the

responsible development of our assets and the environments in which we operate. Our two producing mines are

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the Pinto Valley copper mine located in Arizona, US and the Cozamin copper-silver mine in Zacatecas State,

Mexico. In addition, Capstone has the large scale 70% owned copper-iron Santo Domingo development project in

Region III, Chile in partnership with Korea Resources Corporation, as well as a p ortfolio of exploration properties.

Capstone's strategy is to focus on the optimization of operations and assets in politically stable, mining- friendly

regions, centred in the Americas. Our headquarters are in Vancouver, Canada and we are listed on the Tor onto

Stock Exchange (TSX). Further information is available at www.capstonemining.com.

For further information please contact:

Jerrold Annett, VP, Strategy and Capital Markets

647-273-7351

[email protected]

Virginia Morgan, Manager, IR and Communications

604-674-2268

[email protected]

CAUTIONARY NOTE REGARDING FORWARD-LOOKING INFORMATION

This document may contain “forward-looking information” within the meaning of Canadian securities legislation and “forward-

looking statements” within the meaning of the United States Private Securities Litigation Reform Act of 1995 (collectively,

“forward-looking statements”). These forward-looking statements are made as of the date of this document and the Company

does not intend, and does not assume any obligation, to update these forward-looking statements, except as required under

applicable securities legislation.

Forward-looking statements relate to future events or future performance and reflect our expectations or beliefs regarding

future events and the impacts of the ongoing and evolving COVID-19 pandemic. Forward-looking statements include, but are

not limited to, statements with respect to the estimation of Mineral Resources and Mineral Reserves, the realization of Mineral

Reserve estimates, the timing and amount of estimated future production, costs of production and capital expenditures, the

success of our mining operations, the continuing success of mineral exploration, Capstone’s ability to fund future exploration

activities, environmental risks, unanticipated reclamation expenses and title disputes. The potential effects of the COVID-19

pandemic on our business and operations are unknown at this time, including Capstone’s ability to manage challenges and

restrictions arising from COVID-19 in the communities in which Capstone operates and our ability to continue to safely operate

and to safely return our business to normal operations. The impact of COVID-19 to Capstone is dependent on a number of

factors outside of our control and knowledge, including the effectiveness of the measures taken by public health and

governmental authorities to combat the spread of the disease, global economic uncertainties and outlook due to the disease,

and the evolving restrictions relating to mining activities and to travel in certain jurisdictions in which we operate.

In certain cases, forward-looking statements can be identified by the use of words such as “plans”, “expects”, “budget”,

“scheduled”, “estimates”, “forecasts”, “intends”, “anticipates”, “believes” or variations of such words and phrases, or statements

that certain actions, events or results “may”, “could”, “would”, “might” or “will be taken”, “occur” or “be achieved” or the negative

of these terms or comparable terminology. In this document certain forward-looking statements are identified by words

including “anticipated”, “guidance”, “plan” and “expected”. By their very nature, forward-looking statements involve known and

unknown risks, uncertainties and other factors that may cause our actual results, performance or achievements to be

materially different from any future results, performance or achievements expressed or implied by the forward-looking

statements. Such factors include, amongst others, risks related to inherent hazards associated with mining operations and

closure of mining projects, future prices of copper and other metals, compliance with financial covenants, surety bonding, our

ability to raise capital, Capstone’s ability to acquire properties for growth, counterparty risks associated with sales of our

metals, use of financial derivative instruments and associated counterparty risks, foreign currency exchange rate fluctuations,

market access restrictions or tariffs, changes in general economic conditions, accuracy of Mineral Resource and Mineral

Reserve estimates, operating in foreign jurisdictions with risk of changes to governmental regulation, compliance with

governmental regulations, compliance with environmental laws and regulations, reliance on approvals, licenses and permits

from governmental authorities, acting as Indemnitor for Minto Exploration Ltd.’s surety bond obligations post divestiture, impact

of climatic conditions on our Pinto Valley and Cozamin operations, aboriginal title claims and rights to consultation and

accommodation, land reclamation and mine closure obligations, risks relating to widespread epidemics or pandemic outbreak

including the COVID-19 pandemic; the impact of COVID-19 on our workforce, suppliers and other essential resources and

what effect those impacts, if they occur, would have on our business, including our ability to access goods and supplies, the

ability to transport our products and impacts on employee productivity, the risks in connection with the operations, cash flow

and results of Capstone relating to the unknown duration and impact of the COVID-19 pandemic, uncertainties and risks

related to the potential development of the Santo Domingo Project, increased operating and capital costs, challenges to title to