Talvivaaran Kaivososakeyhtiö Oyj : Talvivaara Gypsum pond leakage has been
Stock Exchange Release
Talvivaara Mining Company Plc
9 April 2013
Gypsum pond leakage has been stemmed
Talvivaara Mining Company Plc ("Talvivaara" or the "Company") announces that
the gypsum pond leakage detected on 7 April 2013 at its Sotkamo mine has,
based on current knowledge, been successfully stemmed. The leakage point in
the pond was detected in the afternoon of 8 April 2013, after which the
Company started to fill the leakage point with moraine. On the basis of
current knowledge Talvivaara estimates that the water volume leaked to the
safety dams is less than 400,000 m3. The total water volume of the pond
section where the leakage occurred is estimated at approximately 620,000 m3.
The safety capacity and treatment capacity at the water treatment units are
sufficient for treating the water that has leaked and may still leak from the
gypsum pond section in question. No untreated water is expected to be directed
outside of the mine area.
Sufficient safety capacities in the Southern safety dams are highly important
in view risk management. This is especially important in anticipation of the
spring melt, which is expected to accelerate late this week. Talvivaara has
therefore increased the discharge of purified excess water to the Vuoksi
waterway in the South to a level of 800 m3/h and the flow rate will be further
increased to a level of 1,500 m3/h to ensure sufficient safety capacity.
The levels of harmful substances in discharged waters are clearly below the
limit values set in Talvivaara's environmental permit. Water quality has
remained consistent and quality monitoring is carried out continuously.
Talvivaara Mining Company Plc Tel +358 20 7129 800
Pekka Perä, CEO
Saila Miettinen-Lähde, Deputy CEO and CFO
Talvivaara Mining Company Plc
Talvivaara Mining Company is an internationally significant base metals
producer with its primary focus on nickel and zinc using a technology known as
bioheapleaching to extract metals out of ore. Bioheapleaching makes extraction
of metals from low grade ore economically viable. The Talvivaara deposits
comprise one of the largest known sulphide nickel resources in Europe. The ore
body is estimated to support anticipated production for several decades.
Talvivaara has secured a 10-year off-take agreement for 100 per cent of its
main output of nickel and cobalt to Norilsk Nickel and entered into a
long-term zinc streaming agreement with Nyrstar NV. Talvivaara is listed on
the London Stock Exchange Main Market and NASDAQ OMX Helsinki. Further
information can be found at www.talvivaara.com.
Talvivaara Gypsum pond leakage has been stemmed 9.4.2013
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Source: Talvivaaran Kaivososakeyhtiö Oyj via Thomson Reuters ONE
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