Talvivaaran Kaivososakeyhtiö Oyj : Talvivaara Mining Company Plc: Leakage
detected at Talvivaara mine's gypsum pond
Stock Exchange Release
Talvivaara Mining Company Plc
8 April 2013
Leakage detected at Talvivaara mine's gypsum pond
- safety capacity in dams and water treatment capacity sufficient to manage
Talvivaara Mining Company Plc ("Talvivaara" or the "Company") announces that a
leakage has been detected at the gypsum pond of its Sotkamo mine on Sunday
evening 7 April 2013. The leakage is located at the pond section adjacent to
the section where a leakage occurred in November 2012, and is potentially
linked to the previous leakage.
The Company estimates that approximately 250,000 m3 of water has leaked from
the pond by now and that the remaining water volume in the pond section is
approximately 370,000 m3. The safety capacity at Talvivaara's Southern water
treatment unit is currently approximately 1,000,000 m3 and also the water
treatment capacity to treat the water leaking into the dams is sufficient. No
untreated water is therefore expected to be directed outside of the mine area.
The leakage however consumes safety capacity in advance of the spring melt,
and the Company has therefore increased discharge of purified water to the
Southern direction to approximately 800 m3/h and the discharge rate is
estimated to be further increased to approximately 1,500 m3/h later in the
As the risk level of the leaking pond section has been known to be elevated,
the Company has during the current year focused on maximizing safety capacity
in dams through improving dam structures, increasing water neutralization
capacity and discharging treated waters. Under normal circumstances the water
in the gypsum pond would have been treated at the metals recovery plant, but
will now be neutralized at the Southern water treatment unit instead.
Pumping arrangements at Talvivaara's metals recovery plant are currently being
altered such that water purification capacity at the plant can be maximized
and as much as possible of treated water can also be discharged to the
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.
Leakage detected at Talvivaara mine’s gypsum pond 8.4.2013
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Source: Talvivaaran Kaivososakeyhtiö Oyj via Thomson Reuters ONE
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