Overview
About the Project
Endeavour Silver’s Terronera mine is a newly producing mine in Jalisco state, Mexico. We acquired the property in 2010 with the vision of building a high-grade, silver-gold underground mining operation.
After more than a decade of planning, including exploratory drilling, technical reports, environmental assessments, and evaluation of multiple operating scenarios, construction began in 2023 and was completed on Q1 2025. The mine achieved commercial production in October 2025, marking a major milestone for Endeavour Silver and the Terronera team.
OPERATION
Terronera
Jalisco State, Mexico
| Reserve Breakdown | 60% silver / 40% gold |
| Location | 50 km northeast of Puerto Vallarta, Mexico |
| Stage | Production |
Terronera is 100% owned by Endeavour Silver, a Canadian public company based in Vancouver, Canada and listed on NYSE:EXK and TSX:EDR. The Company was established in 2004 and has projects and operations in three countries: Mexico, Chile and the United States.
Endeavour Silver is at the forefront of bringing new silver supply to the marketplace and enabling a cleaner, greener more sustainable world. As a crucial material used in renewable energy, technology and electric vehicles, silver’s role in creating a sustainable future is expanding. Learn more at www.edrsilver.com
Quick Facts
Workforce
583
once in productionMining Process
Underground, ramp access, mechanized long hole & cut & fill
End Product
Concentrate
Mine Life
10
yearsMetal
60%
silver |40%
goldPlant Process
~2,000
tpd capacityflotation plant
Geology
Low sulfidation
epithermal vein
epithermal vein
Annual Estimated Production
4M oz silver
38K oz gold for 7M oz silver equivalent (80:1 ratio)
38K oz gold for 7M oz silver equivalent (80:1 ratio)
Responsible Development
Mexico is one of the world’s premier mining jurisdictions with a long history of successful mining. Our Terronera mine is located in the mountainous region of San Sebastián del Oeste, a historical mining district. The site is approximately 50 kilometres northeast of Puerto Vallarta, a popular and safe tourist destination. The region is heavily forested and the surrounding valleys are occupied by cattle ranches, cornfields and coffee and agave plantations.
Our new Terronera site is an original discovery that has grown in size and scale over the last decade. While the concept of building a new mine is complex, it is also extremely exciting for bringing more employment and business opportunities, as well as improved infrastructure to a local area. At the same time, Endeavour Silver is committed to supporting the economic activities in the region in a sustainable way.
To ensure responsible development, we are advancing the project in line with the Equator Principles (EP4). EP4 is a risk management framework that helps organizations ensure appropriate large scale development or construction while considering and mitigating potential adverse impacts on society and the environment.
Project Infrastructure
Terronera has extensive onsite infrastructure and services to support the mining operation. These include:
- A process plant
- Mine portals
- Truck shop and wash bay
- Maintenance workshop and warehouse
- Road and helipad access routes
- Onsite power generation and distribution
- Waste and tailings storage facilities (“TSF”)
- Sewage and potable water treatment facilities
- Employee accommodations
- Dining room
- Administration building
- Laboratory
- Mine emergency services
- Plant nursery
There will be three tunnel entrances to our underground mine, called mine entry portals
(Portal 1, 2 and 4).
