Overview of the Avesoro Resources’ Tailings Management Approach & Systems
Avesoro Resources (“the Company”) build and operate its Tailing Storage Facilities (“TSF”) in line with international best practice. The Company works to together with International Qualified Engineering Companies to ensure that its TSFs are designed, constructed, operated and closed in line with international best practice.
Each of the Company’s TSFs have been designed and reviewed by qualified engineers from reputable independent engineering organizations (Youga Gold Mine TSF – Digby Wells and Associates (DWA) & Knight Piesold; New Liberty Gold Mine – Epoch & Newfields & Golder UK & Ghana).
Each TSF has an operations manual that provides operation and maintenance guidelines for the TSFs.
Each TSF is operated in compliance with the ICMI requirements. Cyanide detoxification systems are operated at each processing plant to maintain WAD cyanide levels at the TSF below 50ppm. Each site has ground water monitoring boreholes around each TSF to monitor the quality of the ground water. Process water is recycled to the plant to minimize the amount of water being discharged to the TSF.
Regular inspections are undertaken of the facilities by our in house team, host country regulators and third party engineering companies. On an annual basis, a third party audit is undertaken by independent qualified tailings engineers to ensure that there is an independent view taken on the status of the TSFs.
|1. "Tailings Dam" Name/identifier||Youga Gold Mine, Burkina Faso||New Liberty Gold Mine, Liberia|
|2. Location||11.108188 Lat; -0.470695 Long||7.01142 Lat; -11.14072 Long|
|3. Ownership||Owned and Operated by Avesoro Resources||Owned and Operated by Avesoro Resources|
|4. Status||Active Operation||Active Operation|
|5. Date of initial operation||March 1, 2008||May 1, 2015|
|6. Is the Dam currently operated or closed as per currently approved design?||Yes||Yes|
|7. Raising method||Upstream Raise||Phase 2 was a downstream raise, Phase 3 will be a centre line raise upon the Phase 2 expansion|
|8. Current Maximum Height||22m||12.5m|
|9. Current Tailings Storage Impoundment Volume||7.8m m3||5.5m m3 (with 2.36m m3 of tailings contained|
|10. Planned Tailings Storage Impoundment Volume in 5 years time.||4.7m m3 (from 2019 to 2024)||7.2m m3|
|11.Most recent Independent Expert Review||April 2019 by Knight Piesold||March 2019 by Golders|
|12. Do you have full and complete relevant engineering records including design, construction, operation, maintenance and/or closure.||Yes||Yes|
|13. What is your hazard categorisation of this facility, based on consequence of failure?||High Risk based on Canadian Dam Association (CDA) Regulation 2013||High Risk based on Canadian Dam Association (CDA) Regulation 2013|
|14. What guideline do you follow for the classification system?||Canadian Dam Association (CDA) Dam Safety Guidelines (CDA 2013)||Canadian Dam Association (CDA) Dam Safety Guidelines (CDA 2013)|
|15. Has this facility, at any point in its history, failed to be confirmed or certified as stable, or experienced notable stability concerns, as identified by an independent engineer (even if later certified as stable by the same or a different firm).||No||No|
|16. Do you have internal/in house engineering specialist oversight of this facility? Or do you have external engineering support for this purpose?||Both||Both|
|17. Has a formal analysis of the downstream impact on communities, ecosystems and critical infrastructure in the event of catastrophic failure been undertaken and to reflect final conditions? If so, when did this assessment take place?||No, however an informal assessment has been undertaken||No, however an informal assessment has been undertaken|
|18. Is there a) a closure plan in place for this dam, and b) does it include long term monitoring?||Yes and Yes||Yes and Yes|
|19. Have you, or do you plan to assess your tailings facilities against the impact of more regular extreme weather events as a result of climate change, e.g. over the next two years?||Yes||Yes|
|20. Any other relevant information and supporting documentation. |
Please state if you have omitted any other exposure to tailings facilities through any joint ventures you may have.