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First Mining Provides Update on its Springpole Gold Project Activities

Corporate Updates

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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NEWS RELEASE

First Mining Provides Update on its Springpole Gold Project Activities

March 31, 2020 – Vancouver, BC – First Mining Gold Corp. (“First Mining” or the “Company”) (TSX: FF)

(OTCQX: FFMGF) (FRANKFURT: FMG) is pleased to provide an update on the advancements being made

at the Company’s Springpole Gold Project (“Springpole” or the “Project”) located in northwestern Ontario.

First Mining is currently focused on advancing a Pre -Feasibility Study (“PFS”) on the Project as well as

progressing the permitting process.

Pre-Feasibility Update

As noted in First Mining’s news release from January 15, 2020 , a PFS on the Project is underway. This

includes metallurgical and geotechnical drilling, as well as further hydrogeological studies. The Project is

generally accessible by air only, except during the winter months where access is also possible via a winter

ice road. The company contracted a winter ice road earlier this year to support the PFS winter drilling and

metallurgical programs. This has allowed for re -supply of the camp, including diesel for drilling, at a

significantly reduced cost when compared to flying necessities into camp. First Mining anticipates that the

road will be accessible until early April, before the warmer temperatures and spring ice-break commences.

A detailed, two-phase, metallurgical program has been scoped and is underway. The ‘Phase 1’ testwork

program utilized material from the 2016 metallurgical drill program, with testing underway at the SGS

laboratory in Lakefield, Ontario. A second ‘Phase 2’ test work program is being completed using additional

core material obtained from three new metallurgical holes drilled in early 2020. The main objective of the

program is to optimize flotation and cyanide leaching conditions and provide design criteria for the PFS.

Drills were mobilized to the Project in early February. In addition to the three metallurgical drill holes

completed, additional holes have been strategically located to support both hydrogeology and

geotechnical assessment. This combined geotechnical -hydrogeological drill program , which has already

commenced and is anticipated to be completed later this year, will consist of 10 holes in the proposed pit

wall and coffer dam areas. The results of this drilling will help guide how the ground water moves within

the region and provide a better sense of the pit slope stability, which in turn may help improve strip ratio

estimates. A further 14 geotechnical drill holes, in addition to a number of test pits, are also planned as

part of the PFS on-site work to test the proposed plant site, tailings and waste storage areas.

Trade-off studies have also been initiated as part of the PFS work program. These studies focus on the

tailings storage facility, mine plan optimization, process recovery validation and optimization, power

supply and other required infrastructure. These desktop studies aim to uncover potential areas for value

optimization and improvement.

Ken Engquist, COO of First Mining, stated “We are excited with the progress we are making in advancing

the PFS work program at Springpole. We believe there are many areas for improvement on the existing

2019 PEA economics as we de-risk the Project technically. Springpole is a unique project given its size and

scale, and an asset with a meaningful production profile once built. We are excited to unlock this potential

by moving the Project closer to a construction decision.”

In response to the ongoing concerns surrounding COVID-19 and in order to ensure the health and safety

of all its employees at Springpole, First Mining announced on March 24, 2020 the early demobilization of

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contractors on-site at Springpole and a reduction in staffing to care and maintenance levels . Apart from

the field data collection, most of the remaining PFS work will be completed remotely, and as such First

Mining does not anticipate a ny significant delay s in completing the PFS. However, given the need to

complete additional on-site work in support of the PFS at a later date, and the evolving global environment

in respect of COVID-19, First Mining anticipates that the PFS results will now be released in early 2021.

Permitting Update

Consultations are ongoing with the Indigenous communities in support of the advancement of permitting

of the Project. In the provincial Environmental Assessment (“EA”) process, there are two main stages:

development of the Terms of Reference (“ToR”) and development of the EA report.

The ToR is a work plan which will outline how the EA will be prepared, with the ToR document detailing

the community consultation and engagement plan s (for the Indigenous c ommunities, government and

other stakeholders), baseline studies, key components of the project and a range of alternatives that will

be considered. First Mining submitted a revised draft ToR for review to the Ministry of Environment,

Conservation and Parks (“MECP”) on February 20, 2020, with MECP requesting a 45 -day review period.

Simultaneously, First Mining also submitted a revised draft to the Indigenous communities, provincial and

federal government agencies, and various municipal governments near the Project. First Mining is working

towards submission of the final ToR in April 2020, with receipt of the final approved ToR expected by the

end of Q2 2020.

First Mining has also been collecting baseline data and undertaking consultation meetings to advance the

federal and p rovincial EA processes. In 2019 , First Mining completed a data gap assessment on the

environmental baseline work to identify any remaining work requirements for the Project. Data collection

programs as part of this assessment to further advance the EA process included terrestrial studies (species

at risk, a fish and fish habitat study), surface water quality monitoring , geotechnical studies, traditional

and ecological knowledge studies, hydrogeology, groundwater well pumping tests, and tailings and mine

rock geochemical characterization.

First Mining elected to continue to stay in the Canadian Environmental Assessment Act, 2012 permitting

process and not the newly enacted Impact Assessment Act process (“IAA”). First Mining is working on the

Environmental Impact Statement (“EIS”) as per EIS Guidelines that were issued to the Company on June

19, 2018.

The balance of the environmental program for the year involves continued baseline studies (described

above), with a goal of co llecting all of the data required under the ToR for compilation of an EIS by the

end of the year, and submission of the EIS in 2021. While First Mining does not currently foresee any

significant delays to this process , the Company acknowledges the potential for consultation timeframes

to be impacted by the important prioritization of the health and safety of the Indigenous c ommunities

that First Mining is in consultation with.

Despite these uncertainties, First Mining is well financed to continue moving the Springpole project

forward in 2020, having closed an $8.5 million equity financing on March 6, 2020.

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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Filing of Company’s Year-End Filings

First Mining has filed on SEDAR its audited financial statements, management's discussion and analysis

and annual information form for the financial year ended December 31, 2019.

In addition, concurrently with the annual Canadian filings set out above, the Company has filed its annual

report on Form 40 -F with the U.S. Securities and Exchange Commission ("SEC"). The Form 40 -F

incorporates by reference the above annual Canadian filings of First Mining, and is available on the SEC's

website, EDGAR, at www.sec.gov/edgar.shtml.

All the above noted filings are also available on First Mining's website at www.firstmininggold.com, and

printed copies of the filings are available free of charge to First Mining shareholders upon written request.

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 a Canadian -focused gold exploration and development company advancing 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. First Mining’s primary focus is the development and permitting

of its Springpole Gold Project and the advanced exploration of its Goldlund Gold Project, both located in

northwestern Ontario. Springpole is one of the largest undeveloped gold assets in Canada, with permitting

and a Pre-Feasibility Study underway. Goldlund is an advanced explora tion stage asset where drilling in

2020 is planned to define both the extension of the existing resource area and to better define the regional

scale potential. First Mining’s eastern Canadian property portfolio also includes Cameron, Pickle Crow,

Hope Brook, Duparquet, Duquesne, and Pitt.

First Mining was created in 2015 by Mr. Keith Neumeyer, founding President and CEO of First Majestic

Silver Corp.

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

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including the United States Pri vate 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 PFS for Springpole being completed by early 2021; (ii) the winter ice road at the Project being

accessible until the end of March; (iii) the Company’s plans to complete a 10 -hole geotechnical-hydrogeological drill

program at the Project by summer 2020 (iv) the Company’s expectations that the results of the geotechnical -

hydrogeological drill program at the Project will help guide how the ground water moves within the region and

provide a better sense of the pit slope stability ; (v) the Company’s plans to drill a further 14 geotechnical drill holes

at the Project, in addition to a number of test pits, to test the proposed plant site, tailings and waste storage areas ;

(vi) the timing and expected results of trade- off studies at the Project as part of the PFS ; (vii) the Company’s belief

that there are many areas for improvement on the existing economics of the Project; (viii) most of the remaining PFS-

related work being completed remotely: (ix) the timing for completing and submitting the final ToR; (x) receipt of

approval of the final ToR in Q2 2020; (xi) the Company’s primary focus on developing and permitting Springpole and

the advanced exploration of its Goldlund Gold Project; and (xii) realizing the value of the Company’s gold projects for

the Company’s shareholders. 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. There can be no

assurance that such statements will prove to be accurate, and actual results and future events could differ materially

from those anticipated in such statements. Forward- looking statements reflect the beliefs, opinions and projections

on the date the statements are made and are based upon a number o f assumptions and estimates that, while

considered reasonable by the respective parties, are inherently subject to significant business, economic, competitive,

political and social uncertainties and contingencies. Many factors, both known and unknown, coul d cause actual

results, performance or achievements to be materially different from the results, performance or achievements that

are or may be expressed or implied by such forward-looking statements and the parties have made assumptions and

estimates based on or related to many of these factors. Such factors include, without limitation the Company’s

business, operations and financial condition potentially being materially adversely affected by the outbreak of

epidemics, pandemics or other health crises, such as COVID -19, and by reactions by government and private actors

to such outbreaks; risks to employee health and safety as a result of the outbreak of epidemics, pandemics or other

health crises, such as COVID-19, that may result in a slowdown or temporary suspension of operations at some or all

of the Company's mineral properties as well as its head office; fluctuations in the spot and forward price of gold,

silver, base metals or certain other commodities; fluctuations in the currency markets (such as the Canadian dollar

versus the U.S. dollar); changes 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 formations,

pressures, cave- ins and flooding); the presence of laws and regulations that may impose restrictions on mining;

employee relations; relationships with and claims by local communities, indigenous populations and other

stakeholders; availability and increasing costs associated with mining inputs and labour; the speculative nature of

mineral exploration and development; title to properties.; and the additional risks described in the Company’s Annual

Information Form for the year ended December 31, 201 9 filed with the Canadian securities regulatory authorities

under the Company’s SEDAR profile at www.sedar.com, and in the Company’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

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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, dif fer 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 SEC'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 ass ume that all or any part of an "inferred mineral resource”

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 r eport mineralization that does not

constitute "reserves” 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 reserv es

reported by the Company in compliance with NI 43 -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.