Aznalcóllar Mines in Doñana National Park See related mine on the map



Aznalcóllar mines are located in Doñana National and Natural Park, in Andalusia. They are famous due to a natural disaster that occurred here.

Extracted materials

  • Zinc
  • Lead
  • Copper
  • Silver

Anthropological information

The Doñana Disaster, also known as the Aznalcóllar Disaster or Guadiamar Disaster was an industrial accident in Andalusia, southern Spain. On 25 April 1998, a holding dam burst at the Los Frailes mine, near Aznalcóllar, Seville Province, releasing 4–5 million cubic metres of mine tailings. The acidic tailings, which contained dangerous levels of several heavy metals, quickly reached the nearby River Agrio, and then its affluent the River Guadiamar, travelling about 40 kilometres along these waterways before they could be stopped. The Guadiamar is the main water source for the Doñana National Park, a UNESCO World Heritage Site and one of the largest national parks in Europe. The clean-up operation took three years, at an estimated cost of €240 million.


Sociological information

The Los Frailes mine is owned by Boliden-Apirsa (formerly Andaluza de Piritas, S.A.), the Spanish subsidiary of Boliden, and produces about 125,000 tonnes of zinc and 2.9 million ounces (about 3,500 metric tonnes) of silver per year

Archaeological information

As a result of the ecological disaster, nothing survived because of the high acidity of the waste, which contained a mixture of lead, copper, zinc, cadmium and other metals, along with sulphides. The industrial disaster led to a chain of serious environmental issues in the Andalusia region. A not very visible toxic chain spread through the nature which was difficult to break down. High levels of heavy metals are still embedded in soil and water and have found a way into the wildlife. Another major problem lies in the health of the animals that lived around the park. In this mixture of swamps and woodlands, 300 species of birds breed, feed or stop over on their migratory route between Northern Europe and Africa. This migration soon came to an end when the dam exploded; almost 2,000 birds, chicks, eggs, and nests were killed or destroyed and more than 25,000 kilos of dead fish were collected in the aftermath.

Creativity insights/curiosities

Aznalcóllar Mines  accident is considered the greatest environmental disaster in Andalusia. The Boliden Mine raft in Aznalcóllar spilled 6 hm3 of toxic sludge poisoning the Guadiamar basin and entering the Doñana National Park through Entremuros.



Sustainable tourism insights

Doñana National Park, is located between two provinces of Andalucia, Seville and Huelva. It is notable for the great diversity of its biotopes, especially lagoons, marshlands, fixed and mobile dunes, scrub woodland and maquis.  As one of the continent's biggest natural reserves, Doñana is also host of a large variety of bird species. Because of its location and close proximity between Africa and Europe, more than half a million birds winter in the park each year, and perhaps half of Europe’s bird species can be spotted here at one time or another.

Environment sustainability

Reopening the mine would provide 1,000 precious jobs. The process would not be as easy to accomplish, as skeptics suggests reopening the mine would lead to a consecutive burst. Nonetheless, the secretary-general for Innovation, Industry and Energy of Andalucía, Vicente Guerrero, explained that the mine license would stipulate only modern mining techniques would be allowed. The Spaniard also included that no liquid would be used under the exercise of the best technology in the world, which would avoid the creation of poisonous wet tailing.


Aznalcóllar, Andalusia