Constancia is the lowest cost open-pit sulphide copper mine in South America.

Hudbay arrived in Peru with the acquisition of the Constancia copper project in 2011. We completed construction of Constancia in 2014, and the mine went from first production to full production in just five months. Today Constancia is the lowest cost open-pit sulphide copper mine in South America. The Constancia property also includes Pampacancha, a high-grade satellite copper deposit located only four kilometres from the Constancia mill. We continue to work diligently to finalize benefits agreements with the communities near Pampacancha, a necessary precondition before the deposit can be developed. In 2018, we acquired a series of properties near Constancia, adding a large, contiguous block of exploration prospects within trucking distance of the Constancia processing facility.

Number of Employees


Mine Life

100% of Constancia’s employees are from Peru

2020 Performance (Contained metal in concentrate produced)


73,150 tonnes


12,395 ounces


1,622,972 ounces

2021 Production Guidance (Contained metal in concentrate)


72,000 - 88,000 tonnes


40,000 - 50,000 ounces


1,800,000 - 2,170,000 ounces


1,400 - 1,700 ounces


Strengthening safety, efficiency and production at Constancia


As part of a plan to manage air quality, Constancia began using a dust suppressor on a 10-kilometre stretch of road. Hudbay was the first mining company in southern Peru to use the dust suppressor and, following its success, many other mining companies in the area have also begun to use it.

Air quality parameters exceeded at Constancia in 2018


Open, honest and continuous community engagement is critical to exploring and developing new mines. This is what we did and continue to do in Peru. We have also made every effort to learn about the language and values of the Peruvian people and to integrate the operation into their culture. In doing so, we have built strong, positive relationships. Since 2012, we have reached more than 90 agreements with communities near Constancia. These agreements include commitments related to local employment and procurement and investments in health, education and infrastructure initiatives.

Agreements reached with communities near Constancia


Our safety performance in Peru is strong and our people are continuously working to make it even stronger. The Constancia site created a “Taking Care of Your Hands” campaign to raise awareness about risks associated with manual handling work in response to two hand-related injuries at the site. We also launched the Behaviour-Based Safety process – a management tool to reinforce positive behaviours and improve safety performance. To further strengthen the safety culture, Constancia holds twice-monthly “Creating Culture” events designed to engage employees on safety-related issues. Employees and contractors in Peru completed more than 30,000 hours of health and safety induction training in 2018 and over 52,000 hours toward annual occupational health and safety training requirements.

of health and safety induction training completed at Constancia in 2018

Reserves and Resources - Constancia

Current mineral reserves and resources as of January 1, 2020

Mineral Reserve and Resource Estimates1,2,3,4,5 Tonnes Cu Grade
Mo Grade
Au Grade
Ag Grade
Constancia Reserves
Proven 436,500,000 0.29 83 0.041 2.88
Probable 56,100,000 0.25 69 0.045 3.09
Total proven and probable - Constancia 492,600,000 0.29 82 0.042 2.90
Pampacancha Reserves
Proven 32,400,000 0.59 178 0.368 4.48
Probable 7,500,000 0.62 173 0.325 5.75
Total proven and probable - Pampacancha 39,900,000 0.60 177 0.360 4.72
Total proven and probable 532,500,000 0.31 89 0.066 3.04
Constancia Resources
Measured 125,500,000 0.22 65 0.038 2.11
Indicated 118,300,000 0.22 65 0.037 2.05
Inferred 46,600,000 0.30 73 0.054 2.72
Pampacancha Resources
Measured 11,400,000 0.41 101 0.245 4.95
Indicated 6,000,000 0.35 84 0.285 5.16
Inferred 10,100,000 0.14 143 0.233 3.86
Total measured and indicated 260,900,000 0.23 67 0.052 2.27
Total inferred 56,700,000 0.27 86 0.086 2.92

Note: totals may not add up correctly due to rounding.
1Mineral resources are exclusive of mineral reserves and do not have demonstrated economic viability.
2Mineral resources in the above tables do not include mining dilution or recovery factors.
3Metal prices of $3.10 per pound copper, $11.00 per pound molybdenum, $1,500 per ounce gold, and $18.00 per ounce silver were used to estimate mineral reserves and resources.
4Mineral reserves and resources are estimated using a minimum net smelter return (“NSR”) cut-off of $6.14 per tonne and assuming metallurgical recoveries (applied by ore type) of 85.8% on average for the life of mine.
5Mineral resources are based on resource pit designs containing measured, indicated, and inferred mineral resources.

Vea Hudbay Perú laborando en el trabajo y en las comunidades de Perú