Energy and Emissions

BMSC relies on fossil fuels to meet all energy requirements and we closely monitor consumption. In 2016, the mine consumed 1,855 terajoules of energy, derived mostly from diesel and a small portion of petrol. This represents a 25% increase over 2015 due to increased production, specifically the expansion to produce zinc as well as copper concentrates, an increase in total tonnes mined and additional consumption associated with mining from deeper in the pit.

Our reliance on self-generated electricity in a remote location presents an operational risk from potential supply interruptions and an opportunity to diminish our greenhouse gas (GHG) contributions and minimize our operating costs (fuel is one of our most significant costs). BMSC continues to pursue a project to install renewable hybrid energy to offset diesel generation and has identified the current energy provider Aggreko to undertake this optimization.


Emissions at Bisha Mine are generated by mobile sources like dozers, dump trucks, light vehicles, buses for transporting workers, as well as stationary sources, including diesel generators and regeneration kilns. The annual Green House Gas (GHG) calculation also includes fuel for trucking copper/zinc concentrates to the Massawa Port and supplies back to the mine. Direct GHG emissions for 2016 are estimated at 133.3 kt CO2 equivalent, an increase from 2015 directly linked to the increased fuel consumption.

2016 2015 2014
Total emissions tCO2 eq 133,271 106,010 105,128
Mobile sources 61,425 46,090 44,774
Stationary sources 71,846 59,920 60,354

Monitoring devices on stationary and mobile equipment have been in use since 2012, to measure emissions of ozone producing gasses (CO, NO) and other significant air emissions (NOx, SOx).