Cyanide Management

Centerra is a signatory of the International Cyanide Management Code (the Cyanide Code or ICMI). The Cyanide Code focuses exclusively on the safe management of cyanide that is produced, transported and used for the recovery of gold and silver. Certification under the Cyanide Code includes requirements related to financial assurance, accident prevention, emergency response, training, public reporting, stakeholder involvement and verification procedures.

Kumtor has been independently certified and audited for its transportation practices under the Cyanide Code. Kumtor’s most recent certification was in December 2018 and is valid for a three-year period.

In June 2020, Öksüt became a signatory of the Cyanide Code. As prescribed within the Cyanide Code, Öksüt will complete the verification and audit process within three years of the certification date.

In 2020, Öksüt completed a Cyanide Code gap analysis and, in 2021, will begin working toward ICMI certification.

Effluents and Wastewater

We design our sites to manage and minimize the impact of effluents on the environment.

At Kumtor, we recognize that the main wastewater concerns of our communities are related to cyanide. Industrial wastewater, containing residual cyanide, is a component of tailings slurry. The suspended sediment is left in the TSF, and the resulting water is treated at the effluent treatment plant (ETP) prior to release into the environment.

Air Pollution

Our teams continuously monitor the impacts of our operations and activities on air quality and related pollution. We understand the detrimental impacts that air pollution can have on human health and ecosystems, and work to actively mitigate these risks by ensuring that we operate within all regulatory and internationally suggested limits.

Fugitive dust control and mitigation measures may include road and stockpile watering; ambient air monitoring such as meteorological monitoring, dust fall monitoring and fine particulate monitoring; use of dust control agents; and revegetation of disturbed or exposed areas.

In 2019, we installed automatically timed sprinklers along our main accessway to the Öksüt Mine to reduce dust formation during the dry season. At our Endako Mine, in response to community concerns about dust from the TSFs, we began seeding and fertilizing the area around our TSFs in 2015 with a variety of drought-tolerant and sod-building grasses and legumes that have valuable nutrients for tailings impoundments.