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Progress Report on Acid Mine Drainage Management in the Witwatersrand Region

Detailed report on actions taken, mine water status, progress, risk management, and future plans for acid mine drainage in the Witwatersrand mining region presenting to Water and Environment Committee in September 2011.

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Progress Report on Acid Mine Drainage Management in the Witwatersrand Region

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  1. PROGRESS REPORT ON THE MANAGEMENT OFACID MINE DRAINAGE (AMD) IN THE WITWATERSRAND MINING REGIONPortfolio Committee:Water and EnvironmentCape Town, September 2011

  2. Content of Presentation • Background / Introduction • Feedback on actions requested by the Chair of PC: W&E • Update on mine water status per Basin • Recent Developments and Progress • Risk Management • Conclusion / The Way Forward

  3. 1. Background / Introduction • Inter-Ministerial Committee (IMC) on AMD first convened on 01 Sep 2011 • “Mine Water Management in the Witwatersrand Gold Fields with Special Emphasis on Acid Mine Drainage” (IMC AMD Report) approved by Cabinet on 9 Feb 2011 • DWA tasked to implement certain recommendations in IMC AMD Report • TCTA appointed as Implementing Agent on 6 Apr 2011 • Subsequent progress reported to PC: W&E on 21-22 Jun 2011

  4. 2. Feedback on actions (1)

  5. 2. Feedback on actions (2)

  6. 2. Feedback on actions (3)

  7. 3. Updated Mine Water Status in the Witwatersrand Mining Basins(Eastern, Central and Western Basins)

  8. Current mine water status per Basin

  9. Water Level at ERPM (SWV) Shaft – CENTRAL BASIN ECL = 174 mbs

  10. Water Level at #3 Shaft – EASTERN BASIN ECL = 306 mbs

  11. 4. Recent Developments and Progress • TCTA concluded Due Diligence Review for all 3 Basins (7 Jul 2011) • Short-term treatment solution for each Basin conceptualized • Immediate (emergency) solution approved for the Western Basin. Planned for commissioning by Nov - Dec 2011and will improve discharge of treated mine water from 12 ML/day to 32 ML/day • Short-term solution for Western Basin at advanced stage of design. Immediate (emergency) solution and short-term solution will achieve combined output of up to 60 ML/day until ECL attained • Surface and groundwater monitoring systems in place with further improvements / expansion planned to support short-term interventions • Potential users for treated mine water identified in Western Basin • DWA and TCTA have met with liquidators to understand the situation at the Grootvlei Mine (ex Pamodzi Gold) in the Eastern Basin • BA and EIA processes have commenced • Engagement with I & APs have commenced

  12. 5. Risk Management (a)

  13. 5. Risk Management (b) 13

  14. 6. Conclusion / The Way Forward • ToE • Identify information gaps to support long-term solution • Expand surface- and ground-water monitoring • Review TCTA short-term recommendations • TCTA • Implement immediate (emergency) engineering solution in Western Basin • Expropriate land and appoint service providers • Consult I & APs • Inter-Governmental Task Team • DWA advertised bid for Feasibility Study (long-term use of Wits mine water) & concluded mandatory Briefing Session with potential bidders. Bid closed on 01 Sep 2011 and PSP to be appointed by 30 Sep 2011 • DMR to support with access to mine shafts for monitoring, pumping and water treatment infrastructure (Mine Health and Safety) • Ensure proper engagement with Provincial and Local Government • RW to be appointed for operations and maintenance of short-term solutions • Report to the IMC and / Cabinet

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