CAO Cases

Arne Hoel, The World Bank

Latin America & the Caribbean

Peru / Yanacocha-09/Cajamarca

A group of current and former employees
Date Filed
January 27, 2017
Occupational health and safety and information disclosure
Case Status
Open - Compliance


Project Overview

Minera Yanacocha S.R.L. operates a large open-pit gold mine located in the Andes mountains in the Department of Cajamarca, Peru. The company is engaged in the exploration and production of gold. Over a period from 1993 to 1999, IFC committed three loans to finance the capital expenditure programs for three of the company’s mines, Carachugo, Maqui Maqui and La Quinua. In parallel, IFC made an equity investment for a 5% ownership stake in the company, which it continues to hold. 



The complaint was filed in January 2017 by a former employee of Yanacocha, on behalf of himself and other current and former employees. The complainants raise concerns related to occupational health and safety conditions at the mine during their employment. They contend exposure to toxic gases has led to negative impacts on their health. The complaint also raises issues related to information disclosure and the company’s response to these issues. 


CAO Action

CAO found the complaint eligible for further assessment in March 2017. Due to lack of agreement between the parties on pursuing a dispute resolution process facilitated by CAO, the complaint was referred for a compliance appraisal of IFC’s due diligence in August 2017 and merged with a subsequent complaint that addressed substantively similar issues [Yanacocha-10]. CAO concluded its joint compliance appraisal of the Yanacocha-09 and Yanacocha-10 complaints in November 2017. Following a review of documentation, CAO has questions as to the adequacy of IFC’s appraisal and supervision of occupational health and safety risks as relevant to the issues raised by the complainants. CAO has thus concluded that these complaints merit a compliance investigation. In September 2018, CAO released a communique outlining its investigation process, including a CAO site visit to Peru.


All documents relating to this case are available under "View Documents" below.



CAO’s joint compliance appraisal of the Yanacocha-09 and Yanacocha-10 complaints was released in November 2017. CAO has concluded that an investigation is merited in relation to the issues raised in the complaints. CAO published the Terms of Reference for the investigation of IFC’s performance in January 2018.


Status as of September 26, 2018

Project information

Project Name & Number
Yanacocha 2983
Oil, Gas, Mining, & Chemicals
Minera Yanacocha S.A.
Latin America & the Caribbean
Environmental Category
5% equity stake

Case Tracker


  • Eligible: Completed
  • Assessment Period: In Process


  • Under Appraisal: Completed
  • Under Audit: In Process