Taseko Mines : 2024 Sustainability Report
TKO.TO
Published on 06/23/2025 at 17:37
Juns 2025
2024 Sustainability Report
Critical Minerals
Operational Excellence 360° of Value Governance Performance
Gibraltar Mine aerial view
3 Messege from ľke CEO Z Our Compe3u
5 6bouľ Taseko
6 Taseko's 6sseľs a3d Píopeíľies
8 Taseko's ?0?4 Opeíaľio3al a3d Susľai3abiliľv Higkligkľs
9 Susľei3ebiliľu: Our 6pproeck
ľ0 Ouí Busi3ess a3d Susľai3abiliľv 6ppíoack ľ3 Coípoíaľe Policies
ľ4 Susľai3abiliľv Goals
ľ5 Criľicel Mi3erels
ľ6 Taseko's Gíowi3g Role i3
ľ8 Susľai3able Coppeí Píoduced aľ Ïloíe3ce Coppeí ľ9 Gíowi3g Coppeí Dema3d
?0 Opereľio3el E…celle3ce
?ľ E3eígv Ma3ageme3ľ a3d GHG Emissio3s
?? Taili3gs Sľoíage Ïaciliľv a3d Wasľe Ma3ageme3ľ
?5 Waľeí Ma3ageme3ľ
?9 6ií ʘualiľv
30 Biodiveísiľv
3? Healľk a3d Safeľv
33 360° of Velue
Ïxeľurx Sľorixs
?6 Ïlorx3cx Coppxr I3iľieľxs Weľxr Co3sxrveľio3 Opporľu3iľixs
?7 Weľxr Me3egxmx3ľ eľ Gibrelľer Mi3x
3ľ Scouľ Isle3d Volu3ľxxr Rxsľoreľio3 Projxcľ
38 Tesxko cxlxbreľxs ľwo dxcedxs of succxssful opxreľio3s of ľkx Gibrelľer coppxr mi3x!
39 Opx3i3g of Tesxko's Yxllowkxed Projxcľ Officx
4? Ïlorx3cx Coppxr Commu3iľv Ïou3deľio3: I3vxsľi3g i3 ľkx Hxerľ of ľkx Commu3iľv
43 Supporľi3g I3clusivx Plev i3 Perľ3xrskip wiľk ľkx Tow3 of Ïlorx3cx
46 Crvsľel Smiľk Joi3s Tesxko's Boerd of Dirxcľors
34 Commiľme3ľ ľo Ouí Woíkfoíce
36 Ge3eíaľi3g Eco3omic a3d Social Be3efiľs
40 Commu3iľv I3vesľme3ľ a3d Coípoíaľe Givi3g
I3dige3ous Paíľ3eís
I3dige3ous Busi3ess a3d Eco3omic Developme3ľ
Z7 Gover3e3ce
Coípoíaľe Goveí3a3ce
Busi3ess Eľkics a3d Tía3spaíe3cv
Susľei3ebiliľu Performe3ce
5ľ ?0?4 Susľai3abiliľv 6ccou3ľi3g Sľa3daíds Boaíd (S6SB) I3de…: Gibíalľaí Mi3e
54 Taseko Values Meľíics
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2024 Sustainability Report Message from The CEO Our Company
Sustainability
Critical Minerals
Operational Excellence 360° of Value Governance Performance
Taseko's 2024 Sustainability report, titled C² (Copper x Community), focusses on the connection between our core business and the communities that surround and support us.
This connection is visible every day
- in our operational practices, in our community partnerships, and in the 800+ people who proudly work across our organization.
2024 was another remarkable year for Taseko from a sustainability perspective.
At Gibraltar, our flagship operation near Williams Lake in British Columbia (BC), Canada, we celebrated two decades of safe and profitable operations, having produced more than 1.9 billion pounds of copper since the mine restart in 2004.
We received permits for a new water treatment plant - part of a longterm strategy to responsibly manage surplus water - and continued to reduce overall onsite water volumes.
Our biodiversity initiatives expanded at Gibraltar through partnerships and on-the-ground restoration efforts, including the Scout Island project, which brought together employees and community members to restore local ecosystems.
In Arizona, construction of our Florence Copper Project remained on track for first cathode production by late 2025. Once operational, Florence will be one of the lowest carbon and energy intensity copper producers
in the world, offering US-produced, traceable and high-purity copper metal to support North American manufacturing and economic security.
In addition, Florence Copper's innovative water reuse program, which will provide surplus process water for irrigation of on-site alfalfa production, is a prime example of how our operational priorities also provide community benefit.
Taseko has also made significant strides forward at our Yellowhead copper project in the Thompson-Nicola region of BC. In 2024, we opened a project office in Barriere, BC, to support local community engagement. This marks an important milestone in building long-term relationships with surrounding communities.
Yellowhead also initiated the Simpcw First Nation's Indigenous-led assessment process last year, and we will soon enter the provincial and federal environmental assessment
(EA) processes - all important steps in
advancing this major copper project.
Throughout the year, Taseko deepened its commitment to the communities in which we live and work. We hosted 166 engagement events across all our sites, supported local causes with more than $545,000 in donations and sponsorships, and celebrated cultural learning and inclusion through initiatives like the Simpcw First Nation Cultural Day and our National Day for Truth and Reconciliation events.
All of this C² (Copper x Community) work reflects Taseko's conviction that, to be truly successful, mining must deliver '360° of Value' - creating benefits not just for shareholders and customers, but for local and regional communities, businesses, governments, employees and their families.
The sustainability performance and accomplishments described in this report are not just a by-product of our business activities. They are a core element of what we do every day.
If you have comments, questions or suggestions, I encourage you to share them at [email protected]
Stuart McDonald
President and CEO
Note: All currency amounts are stated in Canadian dollars except where otherwise noted.
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2024 Sustainability Report Message from The CEO Our Company
Sustainability
Critical Minerals
Operational Excellence 360° of Value Governance Performance
In this Section About Taseko
Taseko's Assets and Properties Taseko's 2024 Operational
and Sustainability Highlights
Our Compe3v
Gibraltar employees arriving at work 4
2024 Sustainability Report Message from The CEO Our Company
Sustainability
Critical Minerals
Operational Excellence 360° of Value Governance Performance
Headquaíľeíed i3 Va3couveí, Bíiľisk Columbia, Ca3ada, Taseko Mi3es is a dv3amic
As a leading producer of copper, Taseko recognizes opportunity and delivers value through developing and operating world-class copper mines and mineral properties in BC and Arizona.
Taseko's corporate strategy is to grow the Company sustainably and profitably by focusing on the continued operations of its foundational asset - the Gibraltar Mine - while also advancing its pipeline of high-quality advanced-stage development projects, including the Florence Copper Project.
Located in south-central BC, the long-life, Gibraltar copper mine is a state-of-the-art facility that has won numerous environmental and safety awards for operational excellence. It is the second largest copper mine in Canada, which produced 106 million pounds of copper and 1.4 million pounds of molybdenum in 2024, while supporting a 800+ person workforce.
Taseko is now constructing the Florence Copper project in Arizona, with operations slated to commence in 2025. Florence Copper is a unique 'in-situ copper recovery' (ISCR) project with a low energy, water and GHG profile per unit of production. Once in production, Florence Copper will significantly increase Taseko's production of a key metal required for the energy transition, and decrease the Company's enterprise-wide GHG intensity.
Other projects in Taseko's development pipeline include the Yellowhead copper, the New Prosperity copper-gold and the Aley niobium projects, located in British Columbia.
Gibraltar employees arriving at work
Florence Copper construction site
Gibraltar Mine lab technician
Florence Copper construction site
Gibraltar Mine aerial view
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2024 Sustainability Report Message from The CEO Our Company
Sustainability
Critical Minerals
Operational Excellence 360° of Value Governance Performance
BRITISH COLUMBIA
6lev
C A N A D A
Gibrelľer Mi3e
Gibrelľer ew Prosperiľv
WILLIAMS LAKE
Yellowkeed
VANCOUVER
Mi3e Tupe:
In-Situ Copper Recovery (ISCR)
Mi3e Life: 22 Years
633uel Producľio3 Cepeciľu:
85 M lbs Cu
O3-siľe Direcľ Emploume3ľ (forecesľ): ~170
Ïlore3ce Copper Projecľ
Mi3e Tupe:
Open-Pit Copper + Molybdenum
Mi3e Life:
20 Years
LOM 6vg. 633uel Producľio3: 129 M lbs Cu, 2.4 M lbs Mo Toľel Emplouees: 728
U N I T E D S T A T E S
ARIZONA
PHOENIX
Mi3e Tupe:
Open-Pit Copper + Gold
ew Prosperiľu Projecľ
Mi3e Tupe:
Open-Pit Niobium
Mi3e Life: 24 Years
6vg. 633uel Producľio3:
9 M kgs Nb
6leu Projecľ
Yellowkeed Projecľ
Mi3e Tupe:
Open-Pit Copper (w/. Gold + Silver)
Mi3e Life: 25 Years
6vg. 633uel Producľio3:
180 M lbs Cu
O3-siľe Direcľ Emploume3ľ (forecesľ): ~590
Ïlore⭲ce Copper
6
Opeíaľio3 I3 Developme3ľ Developme3ľ 6
2024 Sustainability Report Message from The CEO Our Company
Sustainability
Critical Minerals
Operational Excellence 360° of Value Governance Performance
DEVELOPME T PIPELI E
Gibralľar Mi⭲s - OPERATIO
Located in south-central British Columbia, Taseko's Gibraltar Mine is Canada's second-largest copper producer.
Gibraltar is a state-of-the-art, award-winning facility with a processing capacity of 85,000 tons-per-day and life of mine average annual copper production of 129 million pounds. It is the largest employer in the Cariboo region of BC, and has made important economic and social contributions to the local economy and local communities since 1972.
Gibraltar is among the most efficient open-pit copper mines in the world, producing copper, an essential metal required to facilitate the world's transition to renewable energy and a low-carbon future.
"Technical Report on the Mineral Reserve Update at the Gibraltar Mine" dated March 30, 2022.
Ysllowksed Ľrojscľ
6lsu Ľrojscľ
Taseko's Yellowhead property hosts a large copper deposit and has the potential to be a world-class, long-life, low-cost mine, creating economic value and community benefits for the Thompson-Nicola region of British Columbia for more than a generation.
Located near the community of Vavenby BC, the project will be a 90,000 tonne-per-day open-pit copper mine with a 25-year mine life, creating 590 full-time positions at site.
Taseko has entered into the Simpcw Process, an Indigenous-led environmental assessment, and is about to enter the provincial and federal environmental assessment process in 2025.
Taseko's Aley property in northeast BC hosts one of the largest undeveloped niobium deposits in the world.
Niobium is a 'critical mineral' used in the manufacture of high-strength low-alloy steels with a broad range of industrial,
technological and medical applications, as well as in superalloys for jet engines, land-based turbines and other aerospace, military and energy applications. Niobium may also play a significant role in the evolution of fast-charging, high-power batteries for electric vehicles (EVs), rail operations and energy storage.
The Aley project provides a long-term, critical minerals opportunity for Taseko, its shareholders and the Omineca region of BC.
Ïlors⭲cs Coppsr Projscľ - I DEVELOPME T
Located south of Phoenix, AZ, in the community of Florence, Florence Copper will be a significant employer in the region and the state, supporting more than 800 direct, indirect and induced jobs* in Arizona.
Construction of Florence Copper's commercial production facility began in 2024, with copper production anticipated in late 2025. When operational, the facility will have a production capacity of 85 million pounds of copper annually and a mine life of 22 years.
"NI 43-101 Technical Report, Florence Copper Project, Pinal County, Arizona" dated March 30, 2023
* Source: The Florence Copper Project: Economic & Fiscal Impact Study, conduced by the Arizona State University L. William Seidman Research Institute.
Taseko's New Prosperity property is located in south-central British Columbia and hosts one of the most significant copper and gold deposits in Canada.
In June 2025, Taseko, the Tŝilhqot'in Nation & Province of BC reached an agreement to resolve a longstanding conflict regarding the New Prosperity Project. The Agreement ends litigation among the three parties, while creating the conditions and the opportunity for mineral development to occur on the New Prosperity mineral tenures in future in a manner that benefits the Tŝilhqot'in people, and with their free, prior and informed consent.
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2024 Sustainability Report Message from The CEO Our Company
Sustainability
Critical Minerals
Operational Excellence 360° of Value Governance Performance
8
Teseko's ?0?4 Opereľio⭲el e⭲d Susľei⭲ebiliľv Higkligkľs
Criľicel Mi3xrels
Opxreľio3el E…cxllx3cx
360° of Velux
Copper is recog3ized bu Ce3ede, ľke US e3d ľke Europee3 U3io3 es e criľicel mi3erel
Teseko is e leedi3g
I3 ?0?Z, Gibrelľer celebreľed ?0 ueers of producľio3 u3der Teseko's ow3erskip
Si3ce ?00Z, Gibrelľer kes produced more ľke3 ľ.9 billio3 pou3ds of copper
Gibrelľer Mi3e - ?0?Z Producľio3
106 Millio⭲
Pou⭲ds of Coppeí
1.4 Millio⭲
Pou⭲ds of Molybde⭲um
Permiľ received for desig3 e3d co3sľrucľio3 of e 3ew Weľer Treeľme3ľ Ple3ľ
Toľel Teseko % of Locel
Emplouees Emplouees
838 Gibíalľaí
Mi⭲e
E⭲ľeípíise-Wide (?0?4) Ïloíe⭲ce
1?6 Coppeí
Toľal I⭲dige⭲ous Employees
105 Yellow»ead
Ïemele Represe3ľeľio3:
Va⭲couveí Gibíalľaí Ïloíe⭲ce Yellow»ead
Office Mi⭲e Coppeí
Ope3ed Yellowkeed
Projecľ office
ľ66 Commu3iľu ~$550K
e3gegeme3ľ eve3ľs i⭲ c»aíiľable do⭲aľio⭲s a⭲d
Si… sckolerskips e3d spo⭲soís»ips
Burseries gre3ľed
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Ïlore3ce Copper - ?0?Z
500,000 Weľer Recucli3g
e3d Reuse
co⭲sľíucľio⭲ »ouís wiľ»ouľ Permiľ Rxcxivxd
a loss ľime i⭲cide⭲ľ
Co3sľrucľio3 is o3 ľime e3d o3 budgeľ
Ïirsľ copper ceľkode e…pecľed bu ľke e3d of
?0?5
2024 Sustainability Report Message from The CEO Our Company
Sustainability
Critical Minerals
Operational Excellence 360° of Value Governance Performance
In this Section
Our Business and Sustainability Approach
Corporate Policies
Sustainability Goals
Susľei3ebiliľv: Our 6pproeck
Fertilizer application at Gibraltar Mine
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2024 Sustainability Report Message from The CEO Our Company
Sustainability
Critical Minerals
Operational Excellence 360° of Value Governance Performance
Busi3xss 6pproeck
Taseko's business is built on three core pillars:
Criľicel Mi3xrels
Opxreľio3el E…cxllx3cx
360° of Velux
Copper-Focused Strategy
Building Economic Resilience for Canada
Enabling the Energy Transition
Industry-Leading Safety Record
Strong & Consistent Environmental Performance
Deep Community Commitment
Meaningful Benefits for Employees, Communities, First Nations Partners, and Investors
As a key producer of copper and other critical minerals, Taseko plays a vital role in the global shift toward a low-carbon future. Copper is essential for renewable energy, electrification, and modern infrastructure, powering everything from wind and solar energy systems to electric vehicles.
With rising demand for clean energy solutions, the need for copper will only increase. Taseko is well-positioned to support this transition, ensuring a stable and responsible supply of this essential resource.
Taseko is recognized as a top-tier operator, delivering strong sustainability performance alongside operational success. Since 2005, the Gibraltar Mine has been consistently and profitably managed, demonstrating resilience across multiple commodity cycles. This efficiency ensures stable, long-term benefits for all stakeholders.
Our commitment extends beyond profitability. Taseko upholds the highest standards in workplace health and safety, environmental stewardship, and progressive reclamation. We also prioritize meaningful, mutually beneficial partnerships with local communities, including Indigenous groups, fostering trust and long-term collaboration.
Taseko is dedicated to delivering value at every level - supporting employees, strengthening communities, and generating lasting economic and social benefits.
Our approach ensures that all stakeholders, from our workforce to our Indigenous partners and investors, share in our success.
2024 Sustainability Report Message from The CEO Our Company
Sustainability
Critical Minerals
Operational Excellence 360° of Value Governance Performance
6lig3mx3ľ wiľk S6SB Rxporľi3g Ïremxwork
The Sustainability Accounting Standards Board (SASB) is a leading international sustainability reporting standard that aims to improve and standardize industry specific disclosure of financially material sustainability information. The SASB metrics and methodology provide material information to investors that is relevant to the mining industry.
For the fourth reporting year, Taseko's sustainability disclosures have been mapped using the SASB standard. The Company continues to assess investor, regulator and public expectations with respect to sustainability disclosure, and to evaluate reporting systems and standards that are relevant to our business and align with our approach to sustainability performance. Taseko
continues to believe SASB is the most appropriate system to guide its sustainability disclosure given its focus on key sectoral risks, on generating value and benefits for stakeholders, and concentrating reporting on the metrics that matter most.
Downtown Williams Lake, BC
I3dusľrv I3volvxmx3ľ
Taseko actively participates in business and industry associations on a local, provincial/state and federal level through memberships, sponsorships, and participation in committees and working groups. The Company and our operations are active participants with the following trade associations and community organizations:
Canadian Institute of Mining (Vancouver)
Canadian Mining Games
Central Arizona College Foundation
Centre of Training Excellence in
Mining
Coolidge Chamber of Commerce
Coolidge-Florence Elks Lodge 2350
Florence Ecumenical Council
Florence Lions Club
Florence Rotary
Florence Woman's Club
Greater Florence Chamber of
Commerce
Kamloops & District Chamber of
Commerce
MineralsEd
Mining for Miracles
100 Mile House Chamber of
Commerce
American Exploration and Mining
Association
American Legion Auxiliary
Arizona Chamber of Commerce
Arizona Mining Association
Arizona Forward
Barriere & Area Chamber of
Commerce
BC Chamber of Commerce
BC Technical and Research Committee on Reclamation
Business Council of BC
Business Laureates of BC Hall of Fame Cabinet
Canadian Institute of Mining
(National)
Canadian Institute of Mining (North Central)
Canadian Institute of Mining (South Central)
Canadian Institute of Mining, Surface Mining Society
Mining Association of BC
Mining Foundation of the Southwest
National Mining Association
Pinal Alliance
Pinal County Historical Society
Pinal Partnership
Ǫueen Creek Chamber of
Commerce
Ǫuesnel Chamber of Commerce
Williams Lake Chamber of
Commerce
Society for Mining, Metallurgy and
Exploration
Southern Arizona Business
Coalition
United Way of Pinal County
University of British Columbia Mining Engineering Department Industry Advisory Committee
2024 Sustainability Report Message from The CEO Our Company
Sustainability
Critical Minerals
Operational Excellence 360° of Value Governance Performance
Susľei3eblx Dxvxlopmx3ľ Goels
6dopľed bv all U3iľed
SDG Busi⭲ess Precľices More I⭲fo
?030 6ge3da foí Susľai3able Developme3ľ. Tke ľ7 goals píovide a skaíed bluepíi3ľ foí susľai3abiliľv,
e3couíagi3g all cou3ľíies - developed a3d developi3g - ľo woík i3 global paíľ3eískip ľo ľake acľio3.
As a result of Taseko operations, business activities and the community initiatives we support, our Company is contributing to the advancement of multiple UN SDGs. Taseko's corporate policies and business practices contribute to SDGs in the following ways:
Local procurement and hiring practices
Providing competitive wages and benefits
Health and Safety Policy
Providing competitive wages and benefits
Commitment to community health and wellness through donations to local organizations
Generating government revenues to support public services
Workplace Conduct and Harassment policy
Building a diverse workforce
Permitting and construction of a water treatment plant at Gibraltar
Investigating water conservation opportunities at Florence Copper
Local hiring and procurement
Investing in local communities through memberships, sponsorships, and donations
Commitment to develop Indigenous relationships contributing to Reconciliation
Conducted groundbreaking biological water treatment program at Gibraltar
Page 37
Page 33, 37, 38
Page 49
Page 22-28
Page 27, 28, 35,
37, 38, 40-43,
44, 45
Producing metals that society requires Page 16-19
Energy Management Policy
Achieving low GHG and energy intensity at Florence Copper
Producing copper and other metals required for the energy transition
Environmental Policy
Commitment to progressive reclamation and preservation of biodiversity
Page 16-19, 21
Page 30, 31
Indigenous Peoples Policy - commitment to developing Indigenous relationships, and contributing to Reconciliation
Practicing strong Corporate Governance, with policies such as Code of Ethics, Anti-Corruption, and Whistleblower Policy
Page 44, 45, 49
2024 Sustainability Report Message from The CEO Our Company
Sustainability
Critical Minerals
Operational Excellence 360° of Value Governance Performance
Co3sisľe3ľ wiľk Taseko's appíoack ľo susľai3abiliľv, ľke Compa3v obseíves a3d e3foíces ľke followi3g fu3dame3ľal Coípoíaľe Policies:
Heelľk e⭲d Sefeľv Policv
Tesxko is commifixd ľo providi3g e3d mei3ľei3i3g sefx e3d kxelľkv worki3g co3diľio3s, e3d xsľebliski3g opxreľi3g precľicxs ľkeľ sefxguerd xmplovxxs e3d pkvsicel essxľs.
E⭲viro⭲me⭲ľel Policv
Tesxko is commifixd ľo dxvxlopi3g xffxcľivx e3d xfficix3ľ mxesurxs ľo improvx ľkx proľxcľio3 of ľkx x3viro3mx3ľ, besxd o3 sou3d scix3cx.
I⭲dige⭲ous Peoples Policv
Tesxko is commifixd ľo supporľi3g e3d x3couregi3g Rxco3cilieľio3 wiľk I3digx3ous pxoplxs, crxeľi3g muľuellv bx3xficiel rxleľio3skips e3d commu3iľv succxss. Tkis mev i3cludx supporľ for dxvxlopmx3ľ progrems i3 xduceľio3, ľrei3i3g, kxelľk, culľurx, xmplovmx3ľ e3d busi3xss dxvxlopmx3ľ.
2024 Sustainability Report Message from The CEO Our Company
Sustainability
Critical Minerals
Operational Excellence 360° of Value Governance Performance
Susľei⭲ebiliľv Goels
Taseko has set the following long-term sustainability goals for its operations:
Topic Lo3g-ľerm Goels ?0?Z Updeľe Sľeľus
E3ergu Me3egeme3ľ e3d GHG Emissio3s
Enhance disclosure of Taseko's greenhouse gas (GHG) emissions by publishing enterprise-wide GHG emissions consistent with the Canadian Securities Administrators' (CSA) proposed National Instrument 51-107 (Disclosure of Climate-Related Matters).
Scope 1 and 2 GHG emissions for Taseko operations is included in this report as per CSA requirements.
Once commercial operations at Florence Copper commence, Taseko will
publish enterprise-wide GHG emissions. See page 21 GHG reporting.
On-track
Achieve full commercial production at Florence Copper in Arizona, establishing it as the lowest carbon intensity and lowest energy intensity primary copper producer in North America.
Florence Copper construction is nearing completion. First copper
production is expected by the end of 2025.
On-track
Weľer Me3egeme3ľ Permit, construct and begin operating a water
treatment plant at the Gibraltar Copper Mine to
contribute to the reduction of surplus water stored on-site.
The permitting for a water treatment plant at Gibraltar was completed in 2024. Detailed engineering and procurement is underway. See page 27-28 for details.
Permitting complete
Engineering and procurement in progress
Following the onset of commercial production at Florence Copper, investigate treatment options and secondary uses for surplus water with the goal of achieving 50% 'beneficial use' of surplus process water.
State authorization to reuse surplus process water for irrigation purposes
received in 2025.
Internal planning is underway with the goal of implementing the program prior to the onset of commercial operations. See page 26 for more.
Permitting complete
Reclemeľio3 e3d Biodiversiľu
Through research initiatives and engagement with local Indigenous members, optimize the Gibraltar closure plan to return the land disturbed by mining to a beneficial state that will support native flora and fauna post-mining.
Gibraltar's long-term reclamation objectives incorporate biodiversity
research and on-going community engagement.
Ongoing
2024 Sustainability Report Message from The CEO Our Company
Sustainability
Critical Minerals
Operational Excellence 360° of Value Governance Performance
In this Section
Taseko's Growing Role in North America's Critical Minerals Future
Sustainable Copper Produced at
Florence Copper
Growing Copper Demand
Criľicel Mi3xrels
Florence Copper 15
2024 Sustainability Report Message from The CEO Our Company
Sustainability
Critical Minerals
Operational Excellence 360° of Value Governance Performance
Criľicel Mi3xrels
Taseko will plav a3 i3cíeasi3glv viľal íole i3 supplvi3g domesľicallv píoduced coppeí ľo
Eco3omic secuíiľv a3d e3eígv ľía3siľio3 goals i3
Copper: 6 Criľicel Mi3erel for e Susľei3eble Ïuľure
As the global economy, and the worldwide demand for clean and renewable power, electrification and sustainable technology continues to grow, copper has emerged as a vital resource for the future.
Recognized by Canada, the United States, the European Union and governments around the world as a critical mineral due to its essential role in renewable energy systems, electric vehicles and modern infrastructure, copper is at the core of the transition toward a low-carbon future.
Copper is also an increasingly important commodity for North American energy, manufacturing and economic security, as nations and trading blocs re-align within an increasingly complex and volatile geopolitical landscape.
6ľ Taseko, we aíe píoud ľo be a leadi3g
Copper: Buildi3g Eco3omic Resilie3ce
Tke Role of Copper i3 e Susľei3eble World
Copper is a cornerstone of modern technological innovation, enabling advancements in:
Re3eweble E3ergu: essential for solar panels, wind turbines and energy storage systems, copper facilitates both energy efficiency and efficient distribution.
Elecľrificeľio3: used extensively in electric vehicle motors and batteries, charging stations and grid infrastructure, copper is a
key driver of electrification in the global transportation sector.
Smerľ I3fresľrucľure: from energy-efficient buildings to advanced telecommunications, copper is critical for both efficient construction and reliable performance within modern and modernizing economies.
Amid growing geopolitical uncertainty, ensuring a secure supply of critical minerals in North America has never been more important. Copper is essential to both Canada and the United States' economic and manufacturing resilience, underpinning key sectors tied to national security and the clean energy transition.
The growing importance of ensuring a stable and reliable supply of copper within North America comes at an opportune time for Taseko.
The Company will soon produce LME Grade A copper cathode at its Florence Copper project in central Arizona, beginning in late 2025 - a finished product that requires no overseas smelting or refining. This means Taseko will deliver a domestically produced, ready-to-use supply of copper metal directly to the American market, strengthening the nation's self-sufficiency for multiple technological, manufacturing, military and electrification applications.
First Cathode Harvest from Florence Copper's Production Test Facility (April 24, 2019)
2024 Sustainability Report Message from The CEO Our Company
Sustainability
Critical Minerals
Operational Excellence 360° of Value Governance Performance
Growi3g Copper Producľio3
With Florence Copper's construction well-advanced and first copper expected by the end of 2025 (see feature story on page 18), Taseko is set to become a multi-asset copper producer. At full capacity, Florence Copper will produce 85 million pounds of copper annually, increasing Taseko's enterprise-wide average annual copper production by ~65%.
At full capacity, Taseko's Gibraltar and Florence Copper operations will together produce ~214 million pounds of copper each year. This would make Taseko the fifth largest copper producer in North America.
At Taseko, we remain focused on producing copper and delivering a critical
mineral essential to North America's economic and energy future.
Commu3iľu: deliveri3g 360° of velue for e susľei3eble fuľure
More than just returns to its shareholders, Taseko is committed to delivering value at every level - from supporting employees to strengthening communities to generating lasting economic and social benefits for Canadians and Americans.
Our approach, which we call 'delivering 360° of value' ensures that all stakeholders, from our workforce to our communities and Indigenous partners to our investors, share in our success.
400
Copper Producľio3 (Million Pounds)
200
0
Pesľ Gibrelľer
Prese3ľ Gibrelľer
Gibrelľer ¦ Ïlore3ce Copper
Gibrelľer ¦ Ïlore3ce Copper
¦ Yellowkeed
Teseko is o⭲-ľreck ľo be ľke 5ľk lergesľ copper producer i⭲
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Criľicel Mi3xrels
Ïloíe3ce Coppeí will deliveí u3iquelv 'low-caíbo3', ĮME Gíade 6 coppeí caľkode ľo
Although copper is fundamentally bought and sold in global markets as a commodity, copper metal from the Florence Copper Project is expected to be in high demand due to its uniquely low carbon footprint and because it will be produced in the United States, without the requirement for shipping to and from offshore smelters.
The Florence Copper Project is also located in Arizona - a part of the country in which EV and semi-conductor manufacturing have a large market presence, and where solar power is a significant and growing component of the State's power generation.
Once in full production, copper metal produced at Florence Copper is forecast to have the lowest GHG intensity among primary copper producers in North America. It will also be entirely traceable, as opposed to most of the refined copper produced around the world each year, which comes from smelters and refining facilities that process copper ores and concentrates from multiple sources.
Given its desirable GHG footprint and traceability, it is anticipated that copper metal produced at Florence can achieve premium pricing among American manufacturers focused on delivering products and technologies that reduce GHG emissions -including EV manufacturers and manufacturers of components and equipment for low- and no-carbon power generation.
Florence Copper will produce 99.99% pure, LME Grade A copper cathode on site, thereby eliminating the requirement for shipping of concentrate for downstream smelting/refining processes to produce copper metal.
At full production, the Project will produce 85 million pounds (or ~39,000 tons) of copper annually. While it is not possible at this time to definitively state what downstream manufacturing this production will facilitate, the goal of Florence Copper and its offtake partner, Mitsui, is to seek premium markets for the copper metal by directing it toward manufacturers of energy transition technologies and components.
Florence Copper's Solvent Extraction Plant, under construction
Ïlore3ce Copper CO? I3ľe3siľu* (ľ CO?e/ľ CuEq)
Scope ľ
Scope ?
Scope 3
Dow⭲sľíeam
o dow⭲sľíeam fíeig»ľ,
smelľing, íefining
* Based on average peak production years (years 3-15).
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Criľicel Mi3xrels
Copper is a critical and irreplaceable metal for the most of electrification applications and technologies, and is essential to achieving the goals of the global energy transition.
633uel Coppxr Dxme3d Growľk (?0?ľ-?035)*
The demand for copper from these energy transition sources is projected to grow over the next decade, as follows:
Offskore Wi⭲d
E⭲ergv Teck⭲ologv* 6⭲⭲uel Copper Deme⭲d Growľk
Offshore wind
23%
Undersea cables, generators, transformers
Battery storage
22%
Transformers, wiring
Automotive*
14%
Batteries, motors, charging infrastructure
Solar PV
12%
Wiring, heat exchangers
Onshore wind
10%
Cabling, transformers, substations
Electrical transmission
7%
Transformers, cables, circuit breakers
Electrical distribution
3%
Transformers, cables, circuit breakers
(?0?1-?035)
Use of Copper
Befierv Sľorege
6uľomoľive
Solar PV
S&P Global forecasts that worldwide demand for copper will grow from ~25 million tonnes per year today to ~53 million tonnes per year by 2050, with energy transition technologies and applications driving about half of the growth.
The world has never produced anywhere close to this much copper metal, nor ramped up production so quickly as will be required to meet S&P Global's demand forecast.
O⭲skore Wi⭲d
Elecľricel Disľribuľio⭲
Elecľricel Tre⭲smissio⭲
* Source: S&P Global "The Future of Copper: Will the looming supply gap short-circuit the energy transition?"
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In this Section
Opxreľio3el E…cxllx3cx
Energy Management and GHG
Emissions
Tailings Storage Facility and Waste Management
Water Management Air Ǫuality Biodiversity
Health and Safety
Gibraltar Mine Aerial View
Taseko's approach to environmental
management contributes to the following 20
United Nations Sustainable Development Goals:
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Opxreľio3el E…cxllx3cx
Haul trucks at Gibraltar Mine
Scope ľ
Scope ?
Electrical power utilized at Taseko's
Gibraltar Mine is 98% renewable (BC Hydro)
Florence Copper is forecast to be the lowest GHG intensity primary copper producer in North America
Energy Management Policy (Gibraltar)
Canadian Environmental Protection Act,
1999, Section 46 (Gibraltar)
British Columbia Greenhouse Gas Industrial Reporting and Control Act (Gibraltar)
British Columbia Reg 249/2015: Greenhouse Gas Emission Reporting Regulation (Gibraltar)
Internal Energy Audit (Gibraltar)
3rd Party External GHG Verification Audit (Gibraltar)
Me3egxmx3ľ 6pproeck
Keu Higkligkľs
Performe3ce - ?0?Z
Energy Consumption (GJ)
Grid Electricity
1,565,196
Natural Gas
197,276
Gasoline
37,336
Propane
474
Diesel
1,428,985
Total
3,283,267
% Energy from Grid Electricity
47.0%
% Energy Consumed from Renewable Energy Sources
47.0%
t CO2e - Scope 1
117,765
t CO2e/t CuEq - Scope 1
2.27
% of Scope 1 Covered Under Emissions-Limiting Regulations
100%
t CO2e - Scope 2
4,304
t CO2e/t CuEq - Scope 2
0.08
Taseko co3sisľe3ľlv looks foí oppoíľu3iľies ľo íeduce iľs e3eígv co3sumpľio3 a3d impíove e3eígv efficie3cv aľ Gibíalľaí.
Keu Reguleľio3s or Sľe3derds
Keu Policies e3d Ple3s
Taseko's focus on maximizing production and operational performance means that improving energy efficiency is engrained in the operating culture of Gibraltar. Continuous improvement in energy efficiency is an important component of our success.
Gibraltar develops comprehensive annual GHG reports, which are audited and independently verified by Ruby Canyon Environmental. The reports are provided to BC Hydro as part of Taseko's annual Strategic Energy Management Plan reporting. Emissions are also reported federally as per the Canadian Environmental Protection Act, and provincially as per the
Greenhouse Gas Industrial Reporting and Control Act Greenhouse Gas Emission Reporting Regulation.
I3ľer3el or E…ľer3el Evelueľio3 Processes/ Policies
Florence Copper began construction of its commercial plant in 2024. Therefore, emission point sources did not exist during the reporting period. However, emissions were reported to the
Pinal Air Ǫuality Control District, for any sources identified in the
permit.
117,765
ľ CO?e
?.?7
ľ CO?e/ľ CuEq
4,304
ľ CO?e
0.08
ľ CO?e/ľ CuEq
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Opxreľio3el E…cxllx3cx
Gibraltar Tailings Storage Facility
Me3egxmx3ľ 6pproeck
Teili3gs Sľorege Ïeciliľu
Taseko operates and manages one tailings storage facility (TSF), located at Gibraltar. The main embankment, on the west side of the facility, consists of the downstream and centreline-constructed Cyclone Sand Dam as well as the North Earthfill Dam. Stored water, located at the east end of the facility, is
retained by a conventional water retaining dam known as the East Saddle Dam. The Step-Back Embankment is located upstream of the Cyclone Sand Dam and the North Earthfill Dam crests. Current tailings deposition methodology utilizes cyclone underflow material to stack dewatered coarse tailings between the Step-Back Embankment and the stored water.
The design, operation, and monitoring of the TSF are managed through Gibraltar's Tailings Management System (TMS) to ensure the safe operation of the facility and compliance with relevant permits and regulations. The TMS
Gibraltar Tailings Storage Facility
is part of the Gibraltar site's overarching Environmental Management System (EMS), and includes a Tailings Storage Facility Operation, Maintenance and Surveillance Manual (OMS), which outlines roles and responsibilities, and the requirements to ensure safe operation of the facility. The TMS also includes
a TSF Emergency Preparedness Plan as part of the overall site Emergency Response Plan.
The Gibraltar TSF has several layers of oversight in place - including an internal TSF Ǫualified Person, an external Engineer of Record (EOR), an Independent Tailings Review Board (ITRB) as well as corporate and regulatory oversight.
Trained operators and technical staff operate and monitor the facility on an ongoing basis in accordance with the OMS.
Keu Higkligkľs
Keu Policies e3d Ple3s
Keu Reguleľio3s or Sľe3derds
I3ľer3el or E…ľer3el Evelueľio3 Processes/Policies
Taseko observes best TSF operating
practices
Strong TSF governance, monitoring and reporting structures and systems
TSF technical elements comply with the ICMM Global Industry Standard for Tailings Management
Site-wide Water Surface and Groundwater Management Plan (Gibraltar)
Site-wide Mitigation Plan (Gibraltar)
Life of Mine Tailings Management Plan (Gibraltar)
TSF Water Balance/Management Plan (Gibraltar)
TSF Operation, Maintenance and Surveillance Manual (Gibraltar)
Water Management Operations, Maintenance and Surveillance Manual (Gibraltar)
TSF Risk Management Plan (Gibraltar)
Emergency Response Plan (Gibraltar)
Environmental Management Act Effluent Permit PE-416 (Gibraltar)
Mines Act RSBC Permit M-40 (Gibraltar)
Health, Safety and Reclamation Code for Mines in BC (Gibraltar)
Canadian Dam Safety Guidelines (Gibraltar)
British Columbia Dam Safety Regulation (Gibraltar)
Environmental Management Act Part 2, Section 14; Industrial Landfill and Controlled Open Burning (Gibraltar)
Metals, Diamond and Effluent Mining Regulations (Gibraltar)
Daily Operator Checks (Gibraltar)
Weekly Tailings Review Meetings (Gibraltar)
Monthly Surveillance Review Reporting (Gibraltar)
Annual Independent Tailings Review Board (ITRB) (Gibraltar)
Spring and Fall Dam Safety Inspections (Gibraltar)
Annual Dam Safety Inspection (Gibraltar)
Independent Dam Safety Review (every five years) (Gibraltar)
Regulatory (EMLI) Geotechnical Inspections (Gibraltar)
Engineer of Record (Gibraltar)
Monthly Managers Report (Gibraltar)
Ǫuarterly Executive Review (Gibraltar)
Ǫuarterly Environmental Report (Gibraltar)
Annual Environmental Report (Gibraltar)
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Facility Name
Gibraltar Mine TSF
Location
Gibraltar Mine
Ownership Status
Operator
Operational Status
Active
Construction Method
Cyclone Sand Dam(CSD): Progressive downstream/modified centerline construction raises, North Earthfill Dam (NED): downstream and modified upstream, East Saddle Dam (ESD): Downstream, Step-Back Embankment (SBE): upstream, Underflow Stack: hydraulically placed.
Maximum Permitted Storage Capacity
757 million metric tonnes (dry)
Current Amount of Tailings Stored
673 million metric tonnes (dry)
Consequence Classification
Extreme
Date of Most Recent Independent Technical Review
July 17 - 18, 2024 (Annual ITRB Assessment)
Material Findings
No
Mitigation Measures
Not required. No material findings from report.
Management Approach - Movement of water to Granite Pit and Fraser River Discharge.
In addition, third-party inspections and reviews - such as the Dam Safety Inspection by the EOR (annual), independent Dam Safety Review (every five years), and ITRB assessment (annual) - are fundamental to the ongoing successful operation of the TSF.
The Gibraltar TSF is operated in conformance with the Health, Safety and Reclamation Code for Mines in British Columbia and follows multiple industry best practice standards. Through these and other measures, Taseko ensures its TSF is operated in the safest manner possible.
The International Council on Metals and Mining's (ICMM) Global Industry Standard for Tailings Management sets out a global industry benchmark to achieve strong social, environmental, and technical outcomes for the safe management of tailings facilities. Klohn Crippen Berger, Gibraltar's Engineer of Record, audited Gibraltar's TSF management protocols, practices and operational performance and developed a compliance checklist. The results of Klohn Crippen Berger's 2024 review confirms that TSF operating practices at Gibraltar are in conformance with the technical elements of ICMM's Global Industry Standard.
In addition, Taseko manages the Gibraltar tailings storage facility in conformance with the Mining Association of Canada's 'A Guide to the Management of Tailings Facilities' (2011).
Teili⭲gs Sľorege I⭲ve⭲ľorv Teble
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Emerge3cu Prepered3ess e3d Respo3se Ple3s
Taseko recognizes the importance of maintaining robust emergency preparedness and response plans to safeguard our employees, local communities, the environment, and the operation. Gibraltar's Tailings Storage Facility (TSF) Emergency Preparedness Plan (EPP) forms part of the overall site Emergency Response Plan (ERP) and has been developed to assist emergency responders with a standardized plan for managing dam safety emergencies at the TSF and water management structures.
The TSF EPP has been developed with consideration of the following codes, permits, and guidelines:
Health, Safety and Reclamation Code for Mines in British Columbia (EMLI 2024);
Health, Safety and Reclamation Code for Mines in British Columbia Guidance Document (MEM 2016);
Mine Emergency Response Plan: Guidelines for the Mining Industry (EMPR 2017);
BC Mines Act. Permit M-40;
BC Environmental Management Act. Permit PE-416. Clause 2.8;
Mining Association of Canada (MAC) TSM Crisis Management and Communications Planning Protocol (MAC 2018);
MAC Guide to the Management of Tailings Facilities. Version 3.2 (MAC 2021a);
MAC Developing an Operations, Maintenance, and Surveillance Manual for Tailings and Water Management Facilities. Version 2.1 (MAC 2021b); and
Canadian Dam Association (CDA) technical bulletin: Application of Dam Safety Guidelines to Mining Dams (CDA 2019).
Ongoing training of staff, testing of the communications set up, and operational tests of the plan are required to ensure the effectiveness of the response. The Gibraltar Mine staff conduct communications testing on an annual basis. Operational tests, which include staff from emergency
responders, are performed every five years. The EPP is updated based on results
from training and testing.
Operational testing includes Orientation Seminars to familiarize emergency responders with their roles, responsibilities, and procedures and progresses through Drills, Tabletop Exercises and Functional Exercises. The most complex level of testing is the Full Scale Exercise which may include actual evacuation of critical residents if previously announced to the public.
Wesľe Me3egeme3ľ
Wood, metal and solid wastes generated at Gibraltar and Florence Copper are stored in designated areas for sorting and subsequent recycling or responsible disposal. Metal waste may be stored for later use or taken off-site and sold as scrap for recycling. At Gibraltar, municipal solid waste is disposed of at the Cariboo Regional District landfill.
Hazardous wastes are managed to align with federal and provincial/state law and regulations, supplemented by specific company operating procedures.
Waste manifests are maintained, and products tracked throughout their life cycle. Any hydrocarbon contaminated soils are removed from site and managed by a certified waste contractor.
Performe⭲ce - ?0?4
Cardboard (kg)
16,850
Oil Filters (kg)
14,200
Paper (kg)
3,455
Waste oil (l)
267,310
E-waste (kg)
0
Grease/Oil Products2 (l)
200,820
Waste Tires (count)
850
Glycol1 (l)
7,610
Steel (kg)
5,596,752
Batteries (kg)
16,739
Notes:
Waste contractor recycled or disposed items.
Grease/Oil products include - used grease, absorbents, oily water, oily dirt and grease tubes. Waste fuel, solvents, etc.
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Opxreľio3el E…cxllx3cx
Higkligkľs:
Ïlore3ce Copper Recucle & Reuse Permiľ Received
Gibrelľer Weľer Treeľme3ľ Ple3ľ Permiľ Received
87% Reducľio3 i3 ľoľel weľer sľored i3 Gibrelľer's TSÏ
Me3egxmx3ľ 6pproeck
Taseko kas a3 o3goi3g a3d compíeke3sive e3viío3me3ľal mo3iľoíi3g píogíam aľ Gibíalľaí, e3suíi3g all waľeí-íelaľed co3diľio3s íegulaľed bv ľke Bíiľisk Columbia Mi3isľív of E3viío3me3ľ a3d Climaľe Cka3ge Sľíaľegv aíe meľ.
Sample collection methodologies align with procedures developed in the British Columbia Field Sampling Guidelines (2024) and are performed by trained environmental personnel.
Clean water is kept clean through diversions that direct it away from operations to natural water courses. Contact water that has been affected by operations is captured and safely stored within the TSF and inactive pits, for use in the milling process, and/or safe, permanent discharge.
See page 27 for further information on Gibraltar's water management practices.
Gibraltar Tailings Storage Facility
6ddiľio3el Higkligkľs
Keu Policies e3d Ple3s
Keu Reguleľio3s or Sľe3derds
I3ľer3el or E…ľer3el Evelueľio3 Processes/Policies
Permit received for design and construction of a water treatment plant at Gibraltar
0% water withdrawn from areas of high baseline water stress
Enterprise-wide Environmental Policy
Site Wide Water Management Plan (Gibraltar)
Environmental Management System (Gibraltar)
Fraser River Trigger Response Plan (Gibraltar)
Groundwater Trigger Response Plan (Gibraltar)
Metal Leaching/Acid Rock Drainage Monitoring Plan (Gibraltar)
Mine Surface Water and Groundwater Monitoring Plan (Gibraltar)
Nitrogen Management Plan (Gibraltar)
Adaptive Management Plan (Gibraltar)
Fugitive Dust Management Plan (Gibraltar)
Effluent Permit PE-416 administered under the Environmental Management Act (Gibraltar)
Federal Fisheries Act, and Metal and Diamond Mining Effluent Regulations (Gibraltar)
M-40 Permit issued under Section 10 of Mines Act RSBC (Gibraltar)
Guidelines for Metal Leaching and Acid Rock Drainage at Mine Sites in British Columbia (Gibraltar)
Clean Drinking Water Act (Gibraltar)
Underground Injection Control Regulations
(Florence Copper)
Arizona Laws > Title 49 > Chapter 2 > Article 3 -Aquifer Protection Permit (Florence Copper)
Technical Advisory Committee (Gibraltar)
Klohn Crippen Berger Ltd (KCB) Mine Water Management (MWM) Structures Annual Inspection (Gibraltar)
Environmental Sampling, Monitoring, Data Handling and Reporting Protocols Manual (Gibraltar)
Environmental Inspection Sheets (Gibraltar)
Monthly Managers Report (Gibraltar)
Ǫuarterly Environmental report (Gibraltar)
Annual Environmental report (Gibraltar)
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Ïlorx3cx Coppxr I3iľieľxs Weľxr Co3sxrveľio3 Opporľu3iľixs
Consistent with Taseko's commitment to sustainability and continuous operational improvement, Florence Copper investigates innovative opportunities to conserve and reuse on-site water resources. Given water scarcity issues in Arizona, optimizing the project's water management practices is an important operational priority.
The Florence Copper property comprises more than 1,300 acres of land within the Town of Florence, Arizona. Of this total, about 25% is leased to a local farmer to produce alfalfa.
In order to conserve regional water resources, Florence Copper applied and received State authorization to supplement existing irrigation water sources with surplus process water from operations to satisfy a portion of the on-site farmer's annual water demand. The initiative has the potential to offset up to 1,466 acre-feet of water each year currently used for irrigation purposes.
The initiative will be implemented in 2025. All water will meet State of Arizona water quality standards for irrigation prior to it being provided to the tenant farmer for agricultural purposes.
According to the Arizona Department of Water Resources, one acre-foot of water in Phoenix and in the state's Active Management Areas annually serves an average of approximately
3.5 households. This means Florence Copper's water re-use initiative could save a volume of water equivalent to the annual demand of more than 5,000 homes!
The Florence Copper Operations team will implement this water reuse initiative for
commercial operations in 2025.
Alfalfa
Weľer co3serveľio3 is e3 opereľio3el prioriľu eľ Ïlore3ce Copper
Reuse of surplus weľer for irrigeľio3
kes ľke poľe3ľiel ľo offseľ up ľo ľ,Z66
ecre-feeľ of weľer eeck ueer
ľ,Z66 ecre-feeľ is equivele3ľ ľo ľke e33uel deme3d of more ľke3 5,000 6rizo3e komes
26
2024 Sustainability Report
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Operational Excellence 360° of Value Governance Performance
Weľxr Me3egxmx3ľ eľ Gibrelľer Mi3x
Taseko's lo3g-ľeím waľeí ma3ageme3ľ sľíaľegv aľ Gibíalľaí is ľo mai3ľai3 a3 opľimal volume of waľeí wiľki3 ľke Taili3gs Sľoíage Ïaciliľv (TSÏ) ľo píovide foí opeíaľio3al 3eeds, wkile diveíľi3g clea3 waľeí fíom ľke mi3e siľe a3d íespo3siblv ma3agi3g suíplus waľeí ľo avoid a3d mi3imize e3viío3me3ľal impacľ.
Opľimizi3g Sľored Weľer
Managing TSF water levels is a critical component of modern, environmentally responsible hardrock mining, with implications for both site safety and environmental stewardship.
As part of its long-term water management strategy, Gibraltar has prioritized the responsible reduction of on-site water storage, particularly within its TSF.
Weľer Me3egeme3ľ Sľreľegies eľ Gibrelľer
When mining operations commenced at Gibraltar more than 50 years ago, the copper mine had a neutral to negative water balance - which means external water sources were required to meet operational needs. With the passage of time and the expansion of Gibraltar operations, water accumulating on-site exceeded operational needs, necessitating a comprehensive water management strategy to address surplus water volumes.
Since 2014, Gibraltar has successfully reduced overall onsite water volumes, and lowered the volume of water stored in the TSF by 87%. These efforts have improved operational efficiency, reduced environmental risk, and contributed to a safer mine site.
Gibraltar has determined the optimal volume of TSF storage water to maintain operational flexibility, while mitigating environmental risks and impact, to be 5 million cubic meters (Mm3). The current volume of water stored in the Gibraltar TSF is 9.5 Mm3 , down from a high of 70.8 Mm3 in 2014.
Key elements of Gibraltar's multi-faceted water management strategy include:
Off-site Discharge: Gibraltar releases up to 3.5 Mm3 of surplus water annually under stringent permit conditions enforced by the BC Ministry of Environment & Parks
On-site Storage: Surplus water stored in Gibraltar's TSF is transferred to Granite Pit, a decommissioned mining site designated for stable, long-term water storage as part of the mine's closure strategy.
Surface Water Diversion: Gibraltar continues to adjust site water management infrastructure to prevent clean surface water from entering the mine site, reducing the need for active water management.
Evaporation Techniques: Gibraltar employs sprinklers and other mechanical practices to encourage natural evaporation.
Reclaim barge at Gibraltar Tailings Storage Facility
27
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E…plori3g Weľer Recucli3g e3d Reuse
With financial support from OR Royalties, Gibraltar has initiated an assessment of future opportunities to repurpose treated surplus water for regional irrigation.
The ongoing study aims to explore alternative uses for surplus process water at Gibraltar, such as agricultural irrigation, with the goal of benefiting local ranchers and Indigenous communities by reducing reliance on freshwater sources for irrigation needs.
(OR Royalties and Taseko are parties to a silver streaming agreement at Gibraltar. In renewing its streaming agreement in 2024, OR Royalties committed $50,000 to support sustainability initiatives at the mine).
6dve3ci3g Weľer Treeľme3ľ
While the 'Water Management Strategies' summarized on the previous page have yielded positive results in
reducing the overall volume of water stored on site, Gibraltar continues to seek additional reduction methods to enhance its environmental and safety performance.
In order to augment the volume of water it is authorized to discharge off-site each year, while providing flexibility in discharge timing and locations, Gibraltar recently secured regulatory approval from the BC government for a new, state-of-the-art water treatment facility.
Commu3iľu Colleboreľio3 e3d Sľekekolder E3gegeme3ľ
Effective water management at Gibraltar is an important topic of interest to various stakeholders. The mine's Engineering and Environmental teams actively engage with local First Nations, provincial regulators, local property owners and other stakeholders to review its water management practices and performance, and to seek feedback on future opportunities.
This inclusive approach underscores Taseko's commitment to community engagement.
Through its commitment to a long-term vision and careful execution, Gibraltar Mine continues to demonstrate leadership in sustainable water management, balancing operational efficiency with environmental stewardship and community well-being.
In addition to its current on-site water management strategy, Gibraltar recently conducted an Alternatives Assessment to explore additional methods for reducing the volume of water stored on site.
This assessment evaluated 20 different opportunities for enhanced discharge beyond what is outlined in the existing plan. Gibraltar has been working closely with local Indigenous stakeholders to gather feedback and ensure their perspectives are reflected in the process.
Water Monitoring at Gibraltar
28
2024 Sustainability Report Message from The CEO Our Company
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Opxreľio3el E…cxllx3cx
Me3egxmx3ľ 6pproeck
Gibíalľaí a3d Ïloíe3ce Coppeí adkeíe ľo all 3aľio3al/fedeíal a3d píovi3cial/sľaľe laws, íegulaľio3s a3d guideli3es íegaídi3g aií qualiľv, wiľk ľke goal ľo mi3imize ľke íisk of aií qualiľv impacľs ľo kuma3 kealľk a3d ľke e3viío3me3ľ.
Keu Higkligkľs
Full compliance with federal and provincial laws and
regulations
No major air emissions
Robust dust management plan in place
Keu Policies e3d Ple3s
Fugitive Dust Management Plan
Keu Reguleľio3s or Sľe3derds
Canadian Environmental Protection Act (Gibraltar)
Environmental Management Act (Part 2 Section 14) (Gibraltar)
British Columbia Ministry of the Environment Permit PA-1595 (Gibraltar)
Mines Act Permit M-40 (Gibraltar)
National Ambient Air Ǫuality Objectives (Gibraltar)
British Columbia Ministry of Environment Air Ǫuality Objectives (Gibraltar)
National Pollutant Releases Inventory (Gibraltar)
Pinal County Air Ǫuality Control District (PCAǪCD) Air Ǫuality Permit (Florence Copper)
I3ľer3el or E…ľer3el Evelueľio3 Processes/Policies
Dust Monitoring Program (Gibraltar)
Soil and Vegetation Monitoring (Gibraltar)
The Gibraltar Mine does not generate any major air emissions. Minor emissions are generated through dust - including dust from driving on unpaved roads, blasting activities and rail loading. Assessing potential risks to the environment and human health arising from dust must consider the volume of dust in the air, duration of time it is in the air and sensitivity of the receiving environment.
Monitoring is conducted to assess the effectiveness of Gibraltar's Fugitive Dust Management Plan. Inspections are carried out monthly by Gibraltar's Environment Department, in addition to sampling and quarterly/annual reporting to the provincial Environment Ministry, as per Gibraltar's permit requirements.
Ïugiľive Dusľ Ple3
Gibraltar's Fugitive Dust Management Plan guides dust management activities on-site. The Gibraltar plan was developed by a qualified professional. Some of the site-specific operational controls are:
using water injected drills;
blasting during favourable weather conditions, when possible;
minimizing drop height of material when loading ore into haul trucks;
grading and maintaining haul roads, including adequate sheeting with crushed and aggregate rock;
operating two dedicated water trucks in dry, windy conditions during the summer months;
progressive reclamation of waste rock dumps, in line with Gibraltar's reclamation plan;
minimizing areas of new disturbance;
enclosing ball mills and SAG mills within the mill building, and
employing a wet grinding process;
enclosing coarse ore transfer
controlling dust emissions from
mine facilities and access roads;
identifying sources of dust and implementing activity-based effectiveness monitoring programs;
addressing specific environmental and site conditions that may result in generation of dust and implementing proactive reporting procedures;
implementing contingency plans to address circumstances where prescribed dust control measures are ineffective or inoperable;
seeding and fertilizing of the TSF cyclone sand annually; and
planning site-wide dust
suppression.
Various Research Trials and Programs (Gibraltar)
conveyors;
Fertilizing of Gibraltar's TSF cyclone sand and grass to reduce dust
2024 Sustainability Report Message from The CEO Our Company
Sustainability
Critical Minerals
Operational Excellence 360° of Value Governance Performance
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Higkligkľs:
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6ddiľio3el Higkligkľs
Positively contribute to the conservation of biological diversity through all stages of the mining lifecycle
No projects located in endangered species' habitat
Unique copper extraction method at Florence Copper ensures minimal disturbance
Keu Policies e3d Ple3s
Wildlife Management Plan (Gibraltar)
Vegetation Management Plan (Gibraltar)
Planted trees and shrubs at Gibraltar
Keu Reguleľio3s or Sľe3derds
Health, Safety and Reclamation Code for Mines in British Columbia (Gibraltar)
Mine's Act Permit M-40 (Gibraltar)
British Columbia Ministry of Environment and Climate Change Strategy; Wildlife Act (Gibraltar)
British Columbia Ministry of Forests, Lands and Natural Resources Operations; Forestry Act (Gibraltar)
Federal Migratory Birds Convention Act (Gibraltar)
Federal Species at Risk Act (Gibraltar)
Environment Canada 's Canada Wildlife Act (Gibraltar)
I3ľer3el or E…ľer3el Evelueľio3 Processes/Policies
Wildlife Camera Monitoring (Gibraltar)
Inspections of electrical fence around CRD Landfill (Gibraltar)
Wildlife Interaction Standard Operating Procedure (Gibraltar)
Annual Bear Aware Campaign (Gibraltar)
Employee Wildlife Interactions and Awareness Program (Gibraltar)
Me3egxmx3ľ 6pproeck
Gibíalľaí sľíives ľo co3ľíibuľe ľo ľke co3seívaľio3 of biological diveísiľv ľkíougk all sľages of ľke mi3i3g lifecvcle. Tkis i3cludes adkeíe3ce ľo all íeleva3ľ íegulaľio3s a3d peímiľ co3diľio3s a3d avoidi3g, miľigaľi3g a3d ma3agi3g impacľs o3 biodiveísiľv íelaľed ľo vegeľaľio3 íemoval, co3ľíol of i3vasive species a3d impleme3ľaľio3 of measuíes ľo píoľecľ wildlife.
Gibraltar monitors fauna return to reclaimed areas across the mine site through game cameras that capture and record wildlife presence. Trails are reclaimed on site with different trees species, with and without fertilizer application. The objective is to understand how fertilizer prescription influences survival, establishment and overall growth of individual species. This informs planning and costing of reclamation work in the future.
As well, Gibraltar undertakes breeding bird surveys with the objective to identify bird species present in different vegetation types and to provide baseline data for ongoing bird monitoring. This program assists in evaluating the success of site rehabilitation efforts.
Disclaimer
Taseko Mines Limited published this content on June 23, 2025, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on June 23, 2025 at 21:36 UTC.