Saturday, September 26, 2026
MiningNewsTerminal
Saturday, September 26, 2026 Admin

FF.TO ·

First Mining Files Technical Report for the Positive Updated Preliminary Economic Assessment for the Springpole Gold Project Pre-Tax NPV5% of US$1.23 billion, Pre-Tax IRR of 26% and AISC of US$552/oz Average Annual Gold Production of 410,000 ounces in Years 2 through 9

Technical Reports (NI 43-101) Economic Studies Production Results

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

- 1 -

NEWS RELEASE

First Mining Files Technical Report for the Positive Updated Preliminary

Economic Assessment for the Springpole Gold Project

Pre-Tax NPV5% of US$1.23 billion, Pre-Tax IRR of 26% and AISC of US$552/oz

Average Annual Gold Production of 410,000 ounces in Years 2 through 9

November 7, 2019 – Vancouver, BC – First Mining Gold Corp. (“First Mining” or the “Company”) (TSX:

FF) (OTCQX: FFMGF) (FRANKFURT: FMG) is pleased to announce it has filed on SEDAR an independent

Preliminary Economic Assessment (“PEA”) technical report (the “Report”) for its Springpole Gold Project

(“Springpole” or the “Project”) located in northwestern Ontario, Canada. The Report, which is entitled

“Preliminary Economic Assessment Update for the Springpole Gold Project, Ontario, Canada” and has an

effective date of September 1, 2019, was prepared by SRK Consulting (Canada) Inc. in accordance with

National Instrument 43-101 Standards of Disclosure for Mineral Projects (“NI 43-101”).

Springpole is one of the largest undeveloped open pit gold projects in North America. The updated PEA

contemplates an open pit mine and milling operation and reflects updated metallurgical testwork that has

demonstrated the potential for significantly improved recoveries. The PEA also reflects updated operating

and capital cost estimates.

PEA Highlights

• $1.23 billion pre-tax net present value discounted at 5% (“NPV5%”) ($1.75 billion at $1,500/oz gold)

• $841 million after-tax NPV5% ($1.22 billion at $1,500/oz gold)

• 26% pre -tax internal rate of return (“IRR”) (33% at $1,500/oz gold), 22% after- tax IRR (28% at

$1,500/oz gold)

• Mine life of 12 years with a 2.5-year pre-production period

• Average annual gold production in years 2 through 9 of 410,000 ounces gold and 2.4 million ounces

silver; 3.9 million ounces gold and 22 million ounces silver recovered over the Life of Mine (“LOM”)

• Low LOM strip ratio of 2.1 to 1 with a LOM mill grade of 1.0 g/t gold and 5.3 g/t silver

• LOM overall metal recoveries of 88% for gold and 93% for silver

• LOM direct operating cash costs (1) estimated at $575/oz of gold equivalent ($514/oz of gold on a by-

product basis)

• LOM all-in sustaining costs (AISC) (2) estimated at $611/oz of gold equivalent ($552/oz of gold on a by-

product basis)

• Initial capital costs estimated at $809 million, using an owner-operated mining scenario

• LOM sustaining capital costs estimated at $124 million, plus $26 million for closure costs

Note: Base case parameters assume a gold price of $1,300/oz and a silver price of $20/oz (the same prices used in the 2017 PEA),

and an exchange rate (C$ to US$) of 0.75. All currencies are reported in U.S. dollars unless otherwise specified. NPV is calculated

as of the commencement of construction and excludes all pre-construction costs.

(1) Cash costs consist of mining costs, processing costs, mine-level G&A, treatment and refining charges and royalties.

(2) AISC consists of cash costs plus sustaining and closure costs.

Dan Wilton, CEO of First Mining, stated “The updated PEA is an important advancement for the Springpole

Gold project, showcasing the Project’s potential size and scale. Springpole is one of a small number of

advanced stage development assets in Canada that has the potential to produce in excess of 400,000

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

- 2 -

ounces of gold when in production. We are excited with th is positive development, as we continue to

advance and de-risk the Project.”

Readers are cautioned that the PEA is preliminary in nature and includes Inferred mineral resources that

are too speculative geologically to have economic considerations applied to them that would enable them

to be categorized as mineral reserves. There is no certainty that PEA results will be realized. Mineral

resources are not mineral reserves and do not have demonstrated economic viability.

Important PEA Parameters

Key Assumptions

Base Case Commodity Prices $1,300/oz Au, $20/oz Ag

Exchange Rate (C$ to US$) 0.75

Production Profile

Total Tonnes Processed (mt) 138.5

Total Tonnes Waste (mt) 319.0

Mill Grade - Gold, Silver 1.00 g/t Au, 5.28 g/t Ag

Mine Life 12 years

Throughput (tonnes per day) 36,000 tpd

Strip Ratio (waste:ore) 2.1 : 1

Overall Recovery - Gold, Silver 88% Au, 93% Ag

LOM Metal Recovered - Gold, Silver 3.9 mozs Au, 21.9 mozs Ag

Average Annual Production - Gold, Silver (Years 1 - 11) 356 kozs Au, 2.0 mozs Ag

Peak Production in Year 5 - Gold, Silver 529 kozs Au, 2.9 mozs Ag

Average Annual Production Years 2 to 9 - Gold, Silver 410 kozs Au, 2.4 mozs Ag

Unit Operating Costs (1)

LOM Average Cash Cost (2) $575/oz gold eq., $514/oz gold (by-product)

LOM Cash Cost plus Sustaining Cost (AISC) (3) $611/oz gold eq., $552/oz gold (by-product)

Project Economics - $1,300/oz Gold Price

NPV5% - Pre-Tax, After-Tax $1.23 billion, $841 million

IRR - Pre-Tax, After-Tax 26%, 22%

Payback Period from Production Date 3.4 years

LOM Cash Flow - Pre-Tax, After-Tax $2.10 billion, $1.49 billion

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

- 3 -

Project Economics - $1,500/oz Gold Price

NPV5% - Pre-Tax, After-Tax $1.75 billion, $1.22 billion

IRR - Pre-Tax, After-Tax 33%, 28%

Payback Period from Production Date 2.9 years

LOM Cash Flow - Pre-Tax, After-Tax $2.88 billion, $2.05 billion

(1) All unit operating costs are shown on both equivalent as well as net of silver by-product credits

(2) Cash costs consist of mining costs, processing costs, mine-level G&A, treatment and refining charges and royalties

(3) AISC includes cash costs plus sustaining capital and closure costs

Economic Sensitivities

The Project economics and cash flows are highly sensitive to changes in the price of gold.

Springpole Economic Sensitivity to Gold Price

Gold Price (US$/oz) $1,200 $1,300 $1,400 $1,500

Pre-Tax NPV5% $972 million $1.23 billion $1.49 billion $1.75 billion

Pre-Tax IRR 23% 26% 30% 33%

After-Tax NPV5% $652 million $841 million $1.03 billion $1.22 billion

After-Tax IRR 19% 22% 25% 28%

Springpole Economic Sensitivity to Capital Costs

Initial Capital Costs +10% $809 million -10%

Pre-Tax NPV5% $1.15 billion $1.23 billion $1.32 billion

Pre-Tax IRR 24% 26% 29%

After-Tax NPV5% $773 million $841 million $909 million

After-Tax IRR 19% 22% 24%

Springpole Economic Sensitivity to Operating Costs

Operating Costs +10% $2.36 billion -10%

Pre-Tax NPV5% $1.07 billion $1.23 billion $1.39 billion

Pre-Tax IRR 24% 26% 28%

After-Tax NPV5% $726 million $841 million $956 million

After-Tax IRR 20% 22% 24%

For further detail regarding the updated PEA for Springpole, First Mining encourages readers to review

the full Report, which is available under First Mining’s SEDAR profile and on the Company’s website at

www.firstmininggold.com, and refers readers to the Company’s news release dated October 16, 2019 ,

which contains a summary of the results of the updated PEA.

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

- 4 -

Qualified Person

Hazel Mullin, P.Geo., Director, Data Management and Technical Services of First Mining, is a “ Qualified

Person” for the purposes of NI 43 -101, and she has reviewed and approved the scientific and technical

disclosure contained in this news release.

About First Mining Gold Corp.

First Mining Gold Corp. is an emerging development company with a diversified portfolio of gold projects

in North America. Having assembled a large resource base of 7.4 million ounces of gold in the Measured

and Indicated categories and 3.8 million ounces of gold in the Inferred category in mining friendly

jurisdictions of eastern Canada, First Mining is now focused on advancing its material assets towards a

construction decision and, ultimately, to production. The Company currently holds a portfolio of 24

mineral assets in Canada, Mexico and the United States.

ON BEHALF OF FIRST MINING GOLD CORP.

Daniel W. Wilton

Chief Executive Officer and Director

For further information, please contact:

Mal Karwowska | Vice President, Corporate Development & Investor Relations

Direct: 604.639.8824 | Toll Free: 1.844.306.8827 | Email: [email protected]

www.firstmininggold.com

Cautionary Note Regarding Forward-Looking Statements

This news release includes certain "forward -looking information” and "forward -looking statements” (collectively

"forward-looking statements”) within the meaning of applicable Canadian and United States securities legislation

including the United States Private Securities Litigation Reform Act of 1995. These forward- looking statements are

made as of the date of this news release. Forward -looking statements are frequently, but not always, identified by

words such as "expects”, "anticipates”, "believes”, “plans”, “projects”, "intends”, "estimates”, “envisages”,

"potential”, "possible”, “strategy”, “goals”, “objectives”, or variations thereof or stating that certain actions, events

or results "may", "could", "would", "might" or "will" be taken, occur or be achieved, or the negative of any of these

terms and similar expressions.

Forward-looking statements in this news release relate to future events or future performance and reflect current

estimates, predictions, expectations or beliefs regarding future events and include, but are not limited to, statements

with respect to: (i) the estimated amount and grade of Mineral Resources at the Springpole Gold Project; (ii) the PEA

representing a viable development option for the Project; (iii) construction of a mine at the Project and related

actions, including dewatering activities; (i v) the potential for the Project to become one of Canada’s largest gold

mines when in production; (v) estimates of the capital costs of constructing mine facilities and bringing a mine into

production, of sustaining capital and the duration of financing payba ck periods; (vi) the estimated amount of future

production, both produced and metal recovered; and (vii) life of mine estimates and estimates of operating costs and

total costs, net cash flow, net present value and economic returns from an operating mine constructed at the Project.

All forward -looking statements are based on First Mining's or its consultants' current beliefs as well as various

assumptions made by them and information currently available to them. The most significant assumptions are set

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

- 5 -

forth above, but generally these assumptions include: (i) the presence of and continuity of metals at the Project at

estimated grades; (ii) the geotechnical and metallurgical characteristics of rock conforming to sampled results,

including the quantities of water and the quality of the water that must be diverted or treated during mining

operations; (iii) the capacities and durability of various machinery and equipment; (iv) the availability of personnel,

machinery and equipment at estimated prices and within t he estimated delivery times; (v) currency exchange rates;

(vi) metals sales prices and exchange rate assumed; (vii) appropriate discount rates applied to the cash flows in the

economic analysis; (viii) tax rates and royalty rates applicable to the proposed mining operation; (ix) the availability

of acceptable financing under assumed structure and costs; (x) metallurgical performance; (xi) reasonable

contingency requirements; (xii) success in realizing proposed operations; (xiii) receipt of permits and other regulatory

approvals on acceptable terms; and (xiv) the fulfillment of environmental assessment commitments and

arrangements with local communities. Although the Company’s management considers these assumptions to be

reasonable based on information currently available to it, they may prove to be incorrect. Many forward- looking

statements are made assuming the correctness of other forward -looking statements, such as statements of net

present value and internal rates of return, which are based on most of the other forward-looking statements and

assumptions herein. The cost information is also prepared using current values, but the time for incurring the costs

will be in the future and it is assumed costs will remain stable over the relevant period.

By their very nature, forward-looking statements involve inherent risks and uncertainties, both general and specific,

and risks exist that estimates, forecasts, projections and other forward- looking statements will not be achieved or

that assumptions do not reflect future experience. We caution readers not to place undue reliance on these forward-

looking statements as a number of important factors could cause the actual outcomes to differ materially from the

beliefs, plans, objectives, expectations, anticipations, es timates assumptions and intentions expressed in such

forward-looking statements. These risk factors may be generally stated as the risk that the assumptions and

estimates expressed above do not occur as forecast, but specifically include, without limitatio n: (i) risks relating to

variations in the mineral content within the material identified as Mineral Resources from that predicted; (ii)

variations in rates of recovery and extraction; (iii) the geotechnical characteristics of the rock mined or through which

infrastructure is built differing from that predicted, the quantity of water that will need to be diverted or treated

during mining operations being different from what is expected to be encountered during mining operations or post

closure, or the rate of flow of the water being different; (iv) developments in world metals markets; (v) risks relating

to fluctuations in the Canadian dollar relative to the US dollar; (vi) increases in the estimated capital and operating

costs or unanticipated costs; (vii) difficulties attracting the necessary work force; (viii) availability of necessary

financing and any increases in financing costs or adverse changes to the terms of available financing, if any; (ix) tax

rates or royalties being greater than assumed; (x) changes in development or mining plans due to changes in

logistical, technical or other factors; (xi) changes in project parameters as plans continue to be refined; (xii) risks

relating to receipt of permits and regulatory approvals; (xiii) delays in stakeho lder negotiations (including

negotiations with affected First Nation groups); (xiv) changes in regulations applying to the development, operation,

and closure of mining operations from what currently exists; (xv) the effects of competition in the markets i n which

First Mining operates; (xvi) operational and infrastructure risks; (xvii) management’s discretion to alter the

Company’s short and long term business plans; and the additional risks described in First Mining's Annual Information

Form for the year ended December 31, 201 8 filed with the Canadian securities regulatory authorities under the

Company’s SEDAR profile at www.sedar.com, and in First Mining’s Annual Report on Form 40-F filed with the SEC on

EDGAR.

First Mining cautions that the foregoing list of factors that may affect future results is not exhaustive. When relying

on our forward -looking statements to make decisions with respect to First Mining, investors and others should

carefully consider the foregoing factors and other uncertainties and potential events. First Mining does not undertake

to update any forward- looking statement, whether written or oral, that may be made from time to time by the

Company or on our behalf, except as required by law.

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

- 6 -

Cautionary Note to United States Investors

This news release has been prepared in accordance with the requirements of the securities laws in effect in Canada,

which differ from the requirements of U.S. securities laws. Unless otherwise indicated, all resource and reserve

estimates included in this news release have been prepared in accordance with NI 43-101 and the Canadian Institute

of Mining, Metallurgy, and Petroleum 2014 Definition Standards on Mineral Resources and Mineral Reserves. NI 43 -

101 is a rule developed by the Canadian Securities Administrators which establishes standards for all public disclosure

an issuer makes of scientific and technical information concerning mineral projects. Canadian standards, including

NI 43- 101, differ significantly from the requirements of the SEC , and mineral resource and reserve information

contained herein may not be comparable to similar information disclosed by U.S. companies. In particular, and

without limiting the generality of the foregoing, the term "resource” does not equate to the term " reserves”. Under

U.S. standards, mineralization may not be classified as a "reserve” unless the determination has been made that the

mineralization could be economically and legally produced or extracted at the time the reserve determination is

made. The S EC's disclosure standards normally do not permit the inclusion of information concerning "measured

mineral resources”, "indicated mineral resources” or "inferred mineral resources” or other descriptions of the amount

of mineralization in mineral deposits that do not constitute "reserves” by U.S. standards in documents filed with the

SEC. Investors are cautioned not to assume that any part or all of mineral deposits in these categories will ever be

converted into reserves. U.S. investors should also understand that "inferred mineral resources” have a great amount

of uncertainty as to their existence and great uncertainty as to their economic and legal feasibility. It cannot be

assumed that all or any part of an "inferred mineral resource” will ever be upgraded to a higher category. Under

Canadian rules, estimated "inferred mineral resources” may not form the basis of feasibility or pre-feasibility studies

except in rare cases. Investors are cautioned not to assume that all or any part of an "inferred mineral r esource”

exists or is economically or legally mineable. Disclosure of "contained ounces” in a resource is permitted disclosure

under Canadian regulations; however, the SEC normally only permits issuers to report mineralization that does not

constitute "res erves” by SEC standards as in- place tonnage and grade without reference to unit measures. The

requirements of NI 43 -101 for identification of "reserves” are also not the same as those of the SEC, and reserves

reported by the Company in compliance with NI 4 3-101 may not qualify as "reserves” under SEC standards.

Accordingly, information concerning mineral deposits set forth herein may not be comparable with information made

public by companies that report in accordance with U.S. standards.