Qualla: Donana Disaster

Donana Disaster: Introduction

Fri, 13 Mar 2026 00:00:00 GMT

On an April morning in 1998, a holding dam at the Los Frailes mine near Aznalcollar cracked open and released a wall of acidic sludge into the Andalusian countryside. Four to five million cubic meters of mine tailings -- laced with dangerous concentrations of zinc, lead, cadmium, and other heavy metals -- poured into the River Agrio, then into the Guadiamar, and raced downstream toward Donana National Park. Workers and emergency crews managed to halt the toxic flood after it had traveled roughly 40 kilometers and covered 4,600 hectares. But the damage was already catastrophic, and the cleanup would take three years.

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Donana Disaster: A Sanctuary in the Path

Fri, 13 Mar 2026 00:00:00 GMT

Donana National Park sits between the provinces of Seville and Huelva, just east of the Portuguese border. It is one of the largest natural reserves on the European continent, a UNESCO World Heritage Site whose lagoons, marshlands, mobile dunes, scrub woodland, and maquis support...

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Donana Disaster: The Day the Dam Broke

Fri, 13 Mar 2026 00:00:00 GMT

The Los Frailes mine, owned by Boliden-Apirsa -- the Spanish subsidiary of the Swedish mining company Boliden -- produced zinc and silver from the mineral-rich Iberian Pyritic Belt. The tailings pond held the acidic waste byproducts of extraction, contained behind an earthen dam....

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Donana Disaster: The Long Recovery

Fri, 13 Mar 2026 00:00:00 GMT

Boliden-Apirsa spent more than US$52 million on cleanup, damage repair, and reimbursement to farmers whose crops were destroyed. In 2014, The Guardian reported that Spain had committed an additional 360 million euros to landscape restoration. Despite these efforts, elevated level...

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Donana Disaster: The Question of Reopening

Fri, 13 Mar 2026 00:00:00 GMT

Remarkably, there has been serious discussion about reopening the Los Frailes mine. Proponents argue that profitable ore remains underground and that a new operation could provide a thousand jobs to a region with high unemployment. Opponents point to the thousands of migratory bi...

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