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Talvivaara Gypsum pond leakage has been stemmed

09.04.2013  |  Globenewswire Europe
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.


Enquiries
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:
http://hugin.info/136227/R/1691501/555484.pdf



This announcement is distributed by Thomson Reuters on behalf of
Thomson Reuters clients. The owner of this announcement warrants that:
(i) the releases contained herein are protected by copyright and
other applicable laws; and
(ii) they are solely responsible for the content, accuracy and
originality of the information contained therein.

Source: Talvivaaran Kaivososakeyhtiö Oyj via Thomson Reuters ONE
[HUG#1691501]




Unternehmen: Talvivaaran Kaivososakeyhtiö Oyj - ISIN: FI0009014716
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