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CO2 & Electricity

Zero Emission Equipment

The underground min equipment is 100% powered by electricity using rail haulage, electric-hydraulic and pneumatic drills, and electric and battery powered mobile equipment.

The result is a zero-emission underground mine that provides a healthier workplace and reduced environmental impact.

  • Greenhouse gas (GHG) emissions less than significant by CEQA thresholds
  • GHG emissions much less than the California and USA versus economic output2
  • GHG emissions a fraction per oz produced versus the gold industry average1

 

Electricity 4,784 67%
Employee Commuting 541 8%
Engineered Fill placement 510 7%
Generator Testing 607 7%
Surface Support Equipment 300 4%
Concentrate Shipping 157 2%
Engineered Fill Trucking 128 2%
Misc. 220 2%
Freight Delivery 108 2%
Total CO2 tonnes per year 7,355  
CO2 Emission 2
CO2 Emission 1

The Project is powered by Nevada County clean energy and Nevada County has a surplus of hydro electric power with ~451,000 MWhr Generated3 vs. ~344,000 MWhr Consumed4 annually

A PG&E 115k kV Transmission Line to Grass Valley operates at less than 50% capacity and an existing 12 kV distribution line is in place at the Brunswick Industrial Site (previously used for saw mill onsite)

The Idaho-Maryland Project uses ~50,000 MWhr per year (average power demand of ~6 MW)

CO2 emissions assumed at average intensity of PG&E grid rather than actual use of 100% hydro-electricity

Lake Spaulding Dam – Nevada County

Lake Spaulding Dam - Nevada County


References

1) Based on Idaho Maryland Mine Project Description & Air Quality Study and assuming production of 100,000 oz per year compared to 2019 estimate by SP Global Market Intelligence

2) Based on Idaho Maryland Mine Project Description & Air Quality Study and assuming production of 100,000 oz per year compared to US and California 2018 greenhouse gas inventories ww3.arb.ca.gov/cc/inventory/pubs/reports/2000_2018/ghg_inventory_trends_00-18.pdf; https://www.eia.gov/environment/emissions/state/analysis/

3) ww2.energy.ca.gov/almanac/renewables_data/hydro/index_cms.php

4) Nevada-County-Energy-Action-Plan