U.S. Securities and Exchange Commission
April 3, 2023
Page 5
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Geo Tail SA (Proprietary) Limited (GTSA) were responsible for the Cyclone Conversion Design and technical evaluation of the
Leeudoorn TSF; and the QPs have relied on the findings of this study.
Item 2.3
The QPs also relied on reports from:
DRA SA (Proprietary) Limited
(DRA);
Geo Tail SA (Proprietary) Limited’s (GTSA);
Beric Robinson Tailings (Proprietary) Limited (Beric Robinson Tailings); and
Digby Wells Environmental (South Africa) (Proprietary) Limited (Digby Wells).
Item 14
An expansion of the currently operating DP2 processing plant is planned to facilitate an increase in processing throughput from the
current TSF Mineral Reserve inventory.
DRA were responsible for the detailed design and associated cost estimates for the expansion of
DP2 as well as the piping and pumping infrastructure. The QPs appointed Spargo Consult, as an independent expert, to assist with the
review of the metallurgical aspects.
Item 15.1
Leeudoorn Facility
The Leeudoorn TSF is located 7km north-east of Fochville on the West Rand, Gauteng Province. Sibanye Gold have, after a detailed, joint
technical review, agreed in principle that FWGR may,
with effect from January 2026, deposit up to 500ktm of tailings onto the Leeudoorn
TSF provided FWGR paid the capital cost to convert the TSF to cyclone depositioning.
The QPs have relied on the findings of Geo Tail SA (Proprietary) Limited’s (GTSA)
Leeudoorn TSF Cyclone Conversion Design and technical
evaluation for an understanding of the planned conversion of the current day wall TSF to a cyclone-based deposition system. The design
has been developed to accommodate the required deposition plan. While the QP has not interrogated the voracity of this work in detail, it
has been benchmarked against other similar conversion projects and has been found to be within proven operational practice and
acceptable risk levels.
Item 15.2.3
Sound Mining has reviewed the
FWGR
Regional Tailings Dam Report
and design
prepared by Beric Robinson Tailings (2020)
(costed by
DRA)
and has concluded that the report provides a solid basis for the future development of a safe RTSF. Sound Mining believes that by
following the principles and design strategy outlined in the report, the chances of a TSF failure will be unlikely. However,
cognizance needs
to be taken of the uncertainties discussed subjectively below.
Item 16.1
The QP considered a five-year period of historical analysis to form an opinion of the gold price and exchange rate to be expected going
forward because the QP is of the opinion that a five-year period sufficiently covers the market volatility seen in the international gold
market. This is also consistent with the five-year period of consensus pricing relied on for the price forecast. The gold price increased in
2020 due to uncertainties related to the outbreak of Covid-19. It then steadily declined to a spot price of ~ZAR945,295/kg (i.e.,
USD1,806.89/oz at ZAR16.27/USD) as at 30 June 2022 (Graph 5).
After interrogating the gold price, the QPs are of the opinion that a gold
price of ZAR914,294/kg, provided by FWGR, is appropriate for use in the economic assessment.