Romanian Tailings Survey Tisa River Basin. Background In January of 2000 a tailings dam in Baia Mare failed releasing cyanide contaminated water into.

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Presentation transcript:

Romanian Tailings Survey Tisa River Basin

Background In January of 2000 a tailings dam in Baia Mare failed releasing cyanide contaminated water into the Tisa River Basin In March of 2000 a tailings dam in Baia Borsa failed releasing sediment into the Tisa River Basin In January of 2000 a tailings dam in Baia Mare failed releasing cyanide contaminated water into the Tisa River Basin In March of 2000 a tailings dam in Baia Borsa failed releasing sediment into the Tisa River Basin

Our Project SRK was brought in as part of a team to inventory and assess the risks posed by tailings dams and waste rock dumps in the Tisa River Basin

Area of Study

Pool to Close to Crest If the tailings pool gets to close to crest of the dam it can saturate the embankment and cause instability

Seepage

Erosion Erosion of the slopes if not controlled with BMPs can lead to tailings release into the environment Erosion of the slopes if not controlled with BMPs can lead to tailings release into the environment

Steep Slopes Over-steepened slopes in tailings can cause slumping failures and erosional failures

Steep Slopes Over-steepened slopes and degrading sulfide ore have caused block failures

Piping of Tailings Grey indicates fresh unoxidized tailings

Cyanide Contaminated Water Cyanide contaminate water from gold production is treated, then released

Tunnel Under Tailings Any conduit under tailings is a danger during closure because of possible failure Tunnels Decant systems Any conduit under tailings is a danger during closure because of possible failure Tunnels Decant systems

Emergency Spillways

Tailings Revegetation

Air Pollution Vegetation loss caused by acid rain

Tailings Pond Fishing Only concern is bioaccumulation of metals in the fish

Closing Mines This tailings dam and associated process plant closed on the 1st of May, two weeks before our inspection

Mining Pictures

The Communist Era

Rosia Montana – Roman Mine

Romanian Culture