Integra Announces Simplified Strategy to Advance Permitting and Development of GOLD-Silver Heap Leaching, Substantially Reducing Capital Requirements and Operating Costs, Initiates Exploration to Expand Heap Leachable Resource at Delamar Project
1050 – 400 Burrard Street
Vancouver, British Columbia, Canada
V6C 3A6
Email: [email protected]
FOR IMMEDIATE RELEASE TSXV: ITR ; NYSE American: ITRG
April 21, 2022 www.integraresources.com
INTEGRA ANNOUNCES SIMPLIFIED STRATEGY TO ADVANCE PERMITTING AND DEVELOPMENT OF
GOLD-SILVER HEAP LEACHING, SUBSTANTIALLY REDUCING CAPITAL REQUIREMENTS AND OPERATING
COSTS, INITIATES EXPLORATION TO EXPAND HEAP LEACHABLE RESOURCE AT DELAMAR PROJECT
• 2022 Strategy: Advance permitting and development of the simple, low-cost heap leach stage as
a stand-alone mine project capable of producing an average of 136,000 ozs per year of gold
equivalent (“AuEq”) based on figures from the Company’s recently announced Pre-feasibility
Study (“PFS”)
• Exploration Program Targeting Heap Leach Resource Expansion Initiated: Aimed at extending
the heap leach mine life through near surface exploration
• Lower Project Financing Risk: Heap leach only mine reduces capital by ~US$235M over the mine
life, a reduction of 40%, reduces site level all-in sustaining cost (“AISC”) per ounce by 15% and will
likely lead to additional project financing options given shortened payback period and higher
margins
• Heap leach site level AISC: US$814/oz AuEq which generates average after-tax annual free-cash
flow of US$101 million over first 7 years
• Lower Permitting Risk: Heap leach only scenario significantly reduce s surface area disturbance
and lowers water and power usage, among other benefits
• Lower Development Ri sk: Development risk of a heap leach mine is expected to be lower than
other processing options
• Mill Optionality Preserved: Non-oxide milling expansion, though not pursued in this year’s
permitting and development, will continue to be optimized through further study work and can
be pursued under the right market conditions.
Vancouver, British Columbia – Integra Resources Corp. (“Integra” or the “Company”) (TSX-V: ITR; NYSE
American: ITRG) is pleased to announce an exploration program to expand the Oxide and Mixed resource
at its DeLamar Project while advancing the heap leach stage of the project into permitting and
development on a stand -alone basis . The simple , low -cost, low -risk strategy to focus on the financial
engine of the Project, the heap leach, does not negate the strong optionality of the project in multiple
areas. Exploration efforts going forward will target heap leachable material to expand the heap leach life-
of-mine.
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Advancing the DeLamar gold-silver project towards permitting and development of the heap leach stage
as a stand-alone mining operation, is a far lower cost , lower risk option for the Company and its
shareholders, creating strong economic returns and rapi d payback . In these inflationary times, with
increased scrutiny on permitting of all resource projects, this is the optimal strategy for the Company and
its shareholders, as it vastly reduces execution risk.
“Integra’s 2022 DeLamar PFS highlighted an abundance of optionality derived from a myriad of
development scenarios to advance the asset. The core financial engine of the DeLamar project is the heap
leach. Based on data provided in the PFS, and despite the f act that the project was costed out during a
period of high inflation, the heap leach operation at DeLamar showed solid returns with an after -tax
NPV(5%) of US$314 million and an after -tax IRR of 33% at US1,7 00/oz Au and US$21.50/oz Ag and
produces close to 1 M ozs of gold equivalent on its own. Leverage to higher gold and silver prices amplifies
the economics, with an after-tax NPV(5%) of US$435 million and an after-tax IRR of 43% at US$1,900 Au
and US$24.03 Ag. During the 8-year heap leach operation, the Project averages 136,000 ozs per year AuEq
with a site level AISC of US$814 /oz Au Eq . The Company will advance permitting of the heap leach
operation while preserving the optionality presented in the PFS in terms of other development scenarios,
once in production. The heap leach stand-alone strategy will result in total project capital savings of over
US$235 million and a decrease in site level AISC of 15%. The strategy also simplifies the future permitting,
financing and construction plans since permitting and financing the heap -leach as a stand -alone mine
without the mill initially, is viewed as a lower risk strategy. When fully developed, DeLamar has the
potential to become one of the lowest cost and largest heap -leach mining operations in North America
that is not currently owned by a major producer.”
Mr. Salamis further states, “DeLamar’s robust heap leach economics in the PFS can be further enhanced
through the addition of heap leachable Oxide and Mixed resources into future mine plans, with obvious
high potential Oxide resource additions occurring near planned mining and processing infrastructure.
Heap-leachable resource expansion upside potential is clearly the lowest-hanging-fruit on the project and
provides the lowest cost means of adding to future production profiles and mine life . Our exploration
team has identified numerous Oxide and Mixed gold-silver targets over our large 5,220-hectare land
package, the most attractive being low-grade stockpiles at surface from mining that occurred on site from
the 1970s-1990s. Other targets occur on extension from existing resources, hosting recent and historically
drilled intercepts that demonstrate bulk tonnage, gold-silver Oxide and Mixed intercepts from 25 m to
100 m in thickness, at average grades consistent with our currently contemplated PFS heap leach gold-
silver grades.”
The Company will continue to assess timing for development of the mill and related operations based on
market factors and other variables in the future, once the heap-leach mine is fully operational. Additional
enhancements to the future Non-oxide processing as well as potential high-grade gold-silver from Florida
Mountain will continue to be studied and explored; however, incorporating these options after permitting
for the heap leach stage presents a much lower -risk investment scenario for the Company and i ts
shareholders. The ability to advance a simple, low-capital intensity and highly economic heap leach stand-
alone gold-silver mine operation while preserving future optionality will be the focus of permitting,
development and exploration on the Project in the near term.
2022: Focus on Heap Leach Mine Development and Permitting
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Permitting work at DeLamar has been initiated and is focused on a fully developed stand-alone heap leach
gold-silver operation. Baseline study work is well underway to support the submittal of a Plan of
Operations in H1 2023. Integra expects many ancillary benefits by focusing on the heap leach stand-alone
mine permitting, including:
• Mill expansion capital requirements will no longer be a project requirement, leading to a savings
of over US$235 million on life of mine capital. In this scenario, estimated site level AISC costs also
drop from US$955/oz to US$814/oz, on a co -product basis , thus significantly reducing future
financing risk.
• Funds generated from the successful future operation of the heap leach will not be initially
committed to Non-oxide mill processing construction, but instead used to reduce the payback
period of the mine and deployed for other purposes such as expanded resource development
• The heap leach stand-alone mine will no longer require the permitting and construction of a mill
or a 97-hectare tailings storage facility, significantly reducing land disturbance and permitting risk
• The amount of waste rock produced from the heap leach stand-alone scenario will be far less.
• Significant reduction in tailings, waste dumps and potential pit lakes.
• Development of the heap leach only mine at DeLamar will lead to significant decreases in water
and power usage, further simplifying permitting and development.
Item Units Heap Leach HL and Mill Difference % Change
Power MW 15 25 10 -40%
Water for processing GPM 526 1,100 574 -52%
Haul trucks Units 11 16 5 -31%
Total Strip Ratio W:O 1.35 2.21 0.86 -39%
Waste rock moved K Tonnes 109,495 273,217 163,722 -60%
Net Operating Cost K US$ 704,343 1,584,466 880,123 -56%
Pre-production Capital K US$ 278,092 288,097 10,005 -3%
Sustaining Capital K US$ 76,855 301,358 224,503 -74%
Total Capital K US$ 354,947 589,455 234,508 -40%
Note: The numbers in the table above include working capital, cash for bond, reclamation, and salvage
value.
2022: Focus on Gold-Silver Oxide Expansion, in proximity to Planned Infrastructure
As highlighted in the 2022 PFS study, significant heap leachable Oxide and Mixed resource expansion
potential exists in many areas of the project. Internal models generated by the Company demonstrate the
tremendous leverage associated with increasing the heap leachable gold-silver resource and amplifying
the mine plan accordingly. The Company has identified the potential to add Oxide and Mixed gold-silver
mineralization for the Heap Leach in three areas: Florida Mountain West, approximately 300 m from the
planned open pit , Black Sheep, adjacent to the Milestone open pit , and historic DeLamar low-grade
stockpiles that are situated adjacent to planned mining and processing infrastructure.
Florida Mountain West:
West of Florida Mountain in the areas of Rich Gulch and Blue Gulch, soil geochemistry and I nduced
Polarization (“IP”) Chargeability has delineated a large, mineralized area of which the upper has potential
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to provide additional Oxide and Mixed resource for the proposed heap -leach operation. This consists of
several 50 m wide zones with a combined strike length of 2 ,000 m with historic al drilling in the area
showing very encouraging grades. Based on the historic al drilling, the depth of partial to complete
oxidation is expected to range between 50 m and 70 m.
Historical drill results for Florida Mountain West can be viewed by clicking on the link below:
https://integraresources.com/site/assets/files/2572/fm_west_drill_results.pdf
To view a map of Florida Mountain West, click on the link below:
https://integraresources.com/site/assets/files/2572/florida_mountain_west_map.pdf
BlackSheep: Slaughterhouse Gulch and Lucky Days
Exploration in the BlackSheep District, to the north of DeLamar, is in its early stages. However, two
extensive areas of outcropping mineralization have been identified based on soil geochemistry, IP
Chargeability, and historical drilling. At Slaughterhouse Gulch, a 2,000 m long by 70 m to 100 m wide
mineralized corridor has been delineated and is ready to be drill tested. Similarly, at Lucky Days, a 1,000
m long by several hundred-meter-wide zone of mineralization will be drill tested this year to better define
the mineralized structures prior to delineating a resource.
Integra and historical drill results for BlackSheep can be viewed by clicking on the link below:
https://integraresources.com/site/assets/files/2572/bs_south_drill_results_slg.pdf
To view a map of BlackSheep South, click on the link below:
https://integraresources.com/site/assets/files/2572/blacksheep_south_map.pdf
DeLamar Low-grade Stockpiles:
There is also an opportunity, through the evaluation of the historical low-grade stockpiles and backfill, for
gold and silver to be processed using similar heap leach methods outlined in the PFS. Kinross Gold Corp
(“Kinross”), the previous operator of the Project, halted production and began reclamation efforts in 2001
at very low gold and silver prices as compared to current prices. The average grade of the approximately
22 Million tonnes (“Mt”) of mill feed processed during the life of the Nerco Kinross operation was 1.2 g/t
Au and 75 g/t Ag, with approximately 70Mt of lower -grade material being stockpiled in low -grade
stockpiles and pit back-fill. During the 20 -year long mining operation, Kinross mine staff clearly viewed
that this material might someday become economic at higher gold-silver prices and improved low-grade
gold-silver processing techniques.
The Company estimates that approximately 60Mt of this run-of-mine low-grade waste could be available
for processing via heap-leaching, subject to further confirmatory studies. Based on preliminary in-house
calculations and limited historic drilling of the low-grade stockpiles, the Company is optimistic that the
average grade of the low-grade dumps and back-fill is likely to be above the 0.2 g/t AuEq used as the Heap
Leach cut-off grade in Integra’s recent PFS.
Kinross drilled into the eastern portion of Waste Dump 1 (see map below). To view a drill results from this
historical drilling, click on the link below:
https://integraresources.com/site/assets/files/2572/waste_dump_1_drill_results.pdf
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To view a map of the low-grade stockpiles at DeLamar, click on the link below:
https://integraresources.com/site/assets/files/2572/del_low-grade_stockpile.pdf
To view a map of the low-grade stockpiles at Florida Mountain, click on the link below:
https://integraresources.com/site/assets/files/2572/fm_low-grade_stockpile.pdf
2022: Further Study of High-grade at Florida Mountain
The Company continues to pursue the high -grade potential below Florida Mountain. To date, the
Company has drilled more than 110 intercepts of high-grade gold and silver at Florida Mountain. The high-
grade structures at Florida Mountain extend 7,000 m on strike in the North-South direction and to a depth
of 400 m. The Company intends to complete surface drilling along this strike length to further identify the
location of high-grade shoots that dip steeply below Florida Mountain.
The Company is in the process of compiling all the high -grade drill intersects to date to further study
continuity at Florida Mountain and the potential for an Inferred Resource Estimate.
Sampling and QA/QC Procedure
Thorough QA/QC protocols are followed on the Project, i ncluding insertion of duplicate, blank and
standard samples in the assay stream for all drill holes. The samples are submitted directly to American
Assay Labs in Reno, Nevada for preparation and analysis. Analysis of gold is performed using fire assay
method with atomic absorption (AA) finish on a 1 assay ton aliquot. Gold results over 5 g/t are re -run
using a gravimetric finish. Silver analysis is performed using ICP for results up to 100 g/t on a 5 acid
digestion, with a fire assay, gravimetric finish for results over 100 g/t silver.
Qualified Person
The scientific and technical information contained in this news release has been reviewed and approved
by E. Max Baker Ph.D. (F.AusIMM), Integra’s Vice President Exploration, of Post Falls, Idaho, and Timothy
D. Arnold (PE, SME), Integra’s Chief Operating Officer, of Reno, Nevada. Each is a qualified person under
NI 43-101.
Cautionary Note Regarding Non-GAAP Financial Measures
Alternative performance measures in this news release such as “cash cost”, “AISC ” “free cash flow” are
furnished to provide additional information. These non-GAAP performance measures are included in this
news release because these statistics are used as key performance measures that management uses to
monitor and assess performance o f the Project, and to plan and assess the overall effectiveness and
efficiency of mining operations. These performance measures do not have a standard meaning within
International Financial Reporting Standards (“IFRS”) and, therefore, amounts presented may not be
comparable to similar data presented by other mining companies. These performance measures should
not be considered in isolation as a substitute for measures of performance in accordance with IFRS.
Cash Costs
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Cash costs include site operating costs (mining, processing, site G&A), refinery costs and royalties, but
excludes head office G&A and exploration expenses. While there is no standardized meaning of the
measure across the industry, the Company believes that this measure is usefu l to external users in
assessing operating performance.
All-In Sustaining Cost (“AISC”)
Site level AISC include cash costs and sustaining capital, but excludes head office G&A and exploration
expenses. The Company believes that this measure is useful to e xternal users in assessing operating
performance and the Company’s ability to generate free cash flow from current operations.
Free Cash Flow
Free cash flows are revenues net of operating costs, royalties, capital expenditures and cash taxes. The
Company believes that this measure is useful to the external users in assessing the Company’s ability to
generate cash flows from the Project.
About Integra Resources
Integra is a development -stage mining company focused on the exploration and de -risking of the past
producing DeLamar gold-silver project in Idaho, USA. Integra is led by the management team from Integra
Gold Corp. which successfully grew, developed and so ld the Lamaque Project, in Quebec, for C$600 m in
2017. Since acquiring the DeLamar Project, which includes the adjacent DeLamar and Florida Mountain
gold and silver deposits, in late 2017, the Company has demonstrated significant resource growth and
conversion while providing robust economic studies in its maiden preliminary economic assessment and
now pre-feasibility study. An independent technical report for the PFS on the DeLamar Project has been
prepared in accordance with the requirements of NI 43-101 and is available under the Company’s profile
at www.sedar.com and on the Company’s website at www.integraresources.com.
ON BEHALF OF THE BOARD OF DIRECTORS
George Salamis
President, CEO and Director
CONTACT INFORMATION
Corporate Inquiries: [email protected]
Company website: www.integraresources.com
Office phone: 1 (604) 416-0576
Forward looking and other cautionary statements
This news release contains “forward -looking information” and “forward -looking statements” (collectively, “forward -looking
statements”) within the meaning of the applicable Canadian securities legislation. All statements, other than statements of
historical fact, are forward -looking statements and are based on expectations, estimates and projections as at the date of this
news release. Any state ment that involves discussion with respect to predictions, expectations, beliefs, plans, projections,
objectives, assumptions, future events or performance (often, but not always using phrases such as “plans”, “expects”, “is
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expected”, “budget”, “scheduled ”, “estimates”, “forecasts”, “intends”, “anticipates”, or “believes” or variations (including
negative variations) of such words and phrases, or state that certain actions, events or results “may”, “could”, “would”, “mi ght”
or “will” be taken, occur or be achieved) are not statements of historical fact and may be forward -looking statements. In this
news release, forward-looking statements relate, among other things, to: statements about the scope, timing and completion of
the Pre-feasibility study; estimates of metallurgical recovery rates and the contribution of silver production to mining operations;
anticipated advancement of DeLamar and future exploration prospects.These forward-looking statements, and any assumptions
upon which they are based, are made in good faith and reflect our current judgment regarding the direction of our business.
Management believes that these assumptions are reasonable. Forward -looking information involves known and unknown risks,
uncertainties and other factors which may cause the actual results, performance, or achievements of the Company to be
materially different from any future results, performance or achievements expressed or implied by the forward -looking
information. Such factors include, among others: risks related to t he speculative nature of the Company’s business; the
Company’s formative stage of development; the Company’s financial position; possible variations in mineralization, grade or
recovery rates; actual results of current exploration activities; actual result s of reclamation activities; conclusions of future
economic evaluations; business integration risks; fluctuations in general macroeconomic conditions; fluctuations in securitie s
markets; fluctuations in spot and forward prices of gold, silver, base metals or certain other commodities; fluctuations in currency
markets (such as the Canadian dollar to United States dollar exchange rate); change in national and local government, legislation,
taxation, controls regulations and political or economic developments; risks and hazards associated with the business of mineral
exploration, development and mining (including environmental hazards, industrial accidents, unusual or unexpected formation
pressures, cave-ins and flooding); inability to obtain adequate insurance to cover risks and hazards; the presence of laws and
regulations that may impose restrictions on mining; employee relations; relationships with and claims by local communities and
indigenous populations; availability of increasing costs associated with mi ning inputs and labour; the speculative nature of
mineral exploration and development (including the risks of obtaining necessary licenses, permits and approvals from
government authorities); and title to properties. Although the forward -looking statements contained in this news release are
based upon what management of Integra believes, or believed at the time, to be reasonable assumptions, Integra cannot assure
its shareholders that actual results will be consistent with such forward -looking statements, as there may be other factors that
cause results not to be anticipated, estimated, or intended.
Forward-looking statements contained herein are made as of the date of this news release and the Company disclaims any
obligation to update any forward-looking statements, whether as a result of new information, future events or results, except as
may be required by applicable securities laws. There can be no assurance that forward -looking information will prove to be
accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly,
readers should not place undue reliance on forward-looking information.
Cautionary Note for U.S. Investors Concerning Mineral Resources and Reserves
National Instrument 43-101 - Standards of Disclosure for Mineral Projects ("NI 43-101") is a rule of the Canadian Securities
Administrators which establishes standards for all public disclosure an issuer makes of scientific and technical information
concerning mineral projects. Technical disclosure contained in this news release has been prepared in accordance with NI 43-
101 and the Canadian Institute of Mining, Metallurgy and Petroleum Classification System. These standards differ from the
requirements of the U.S. Securities and Exchange Commission (“SEC”) and resource information contained in this press release
may not be comparable to similar information disclosed by domestic United States companies subject to the SEC's reporting
and disclosure requirements.
Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Ven ture
Exchange) accepts responsibility for the adequacy or accuracy of this release.