The Hemlo property consists of Williams, an underground and open pit mine, located approximately 350 kilometers east of Thunder Bay, Ontario. Ore from the mine is fed to a standard grind, leach and carbon-in-pulp extraction mill.

Hemlo produced 196,000 ounces of gold in 2017, at a cost of sales1 of $986 per ounce, and all-in sustaining costs2 of $1,092 per ounce. Hemlo’s proven and probable mineral reserves as of December 31, 2017, were 1.77 million ounces of gold3 (24.9 million tonnes, grading 2.21 grams per tonne).

In 2018, gold production is expected to be 200,000-220,000 ounces, at a cost of sales1 of $860-$920 per ounce, and all-in sustaining costs2 of $975-$1,075 per ounce.

Technical Report (PDF, April 25, 2017)


196,000 Ounces of gold produced in 2017 1,774,000 Ounces of proven and probable gold reserves
Date Download Description
January 1, 2013 files/design/bodybg/hemlo.jpg
Operations > North America > Hemlo

Greenhouse Gas & Energy Intensity Data

Energy and GHG Intensity Summary, 2005-2016 (PDF)
2010 Public Summary Report - Ontario Toxics Reduction Act (PDF)

Barrick's operations are implementing energy efficiency programs and beginning to set targets for greenhouse gas emissions. Hemlo Mines in Ontario, Canada has had targets in place since 2005.


Ontario Toxics Reduction Act



  1. Cost of sales applicable to gold per ounce is calculated using cost of sales applicable to gold on an attributable basis (removing the non-controlling interest of 40% Pueblo Viejo and 36.1% Acacia from cost of sales), divided by attributable gold ounces. Cost of sales applicable to copper per pound is calculated using cost of sales applicable to copper including our proportionate share of cost of sales attributable to equity method investments (Zaldívar and Jabal Sayid), divided by consolidated copper pounds (including our proportionate share of copper pounds from our equity method investments).

  2. “Cash costs” per ounce and “All-in sustaining costs” per ounce are non-GAAP financial performance measures. “Cash costs” per ounce starts with cost of sales applicable to gold production, but excludes the impact of depreciation, the non-controlling interest of cost of sales, and includes by-product credits. “All-in sustaining costs” per ounce begin with “Cash costs” per ounce and add further costs which reflect the additional costs of operating a mine, primarily sustaining capital expenditures, general & administrative costs, minesite exploration and evaluation costs, and reclamation cost accretion and amortization. Barrick believes that the use of “cash costs” per ounce and “all-in sustaining costs” per ounce will assist investors, analysts and other stakeholders in understanding the costs associated with producing gold, understanding the economics of gold mining, assessing our operating performance and also our ability to generate free cash flow from current operations and to generate free cash flow on an overall Company basis. “Cash costs” per ounce and “All-in sustaining costs” per ounce are intended to provide additional information only and do not have any standardized meaning under IFRS. Although a standardized definition of all-in sustaining costs was published in 2013 by the World Gold Council (a market development organization for the gold industry comprised of and funded by 23 gold mining companies from around the world, including Barrick), it is not a regulatory organization, and other companies may calculate this measure differently. These measures should not be considered in isolation or as a substitute for measures prepared in accordance with IFRS. Further details on these non-GAAP measures are provided in the MD&A accompanying Barrick’s financial statements filed from time to time on SEDAR at www.sedar.com and on EDGAR at www.sec.gov.

  3. Estimated in accordance with National Instrument 43-101 as required by Canadian securities regulatory authorities. Estimates are as of December 31, 2017, unless otherwise noted. Complete mineral reserve and mineral resource data for all mines and projects referenced on this website, including tonnes, grades, and ounces, can be found on pages 86-91 of Barrick’s Fourth Quarter and Year-End 2017 Report.

Our vision is the generation of wealth through responsible mining — wealth for our owners, our people, and the countries and communities with which we partner.

World Gold Council MemberMember of ICMM

En Español