The former mining area of Lousal has the subject of two major environmental recovery operations.
The first, in 2010/2011, consisted of modelling and preparation of a pyrite landfill, vertical waterproofing of the Dam Area, drainage of water with the construction of rainwater collection and leaching water collection ditches, an acid water treatment system, with the construction of wetlands located downstream of the cementation cells; construction of fences and footpaths; placement of topsoil; modelling of the tailings heap and sealing of galleries. This contract was awarded to the consortium Tecnovia – Sociedade de Empreitadas, SA / LTO – Lavouras e Terraplenagens do Oeste, Lda. for € 1,801,253.20 and had a duration of 365 days.
The second, in 2014/2015, consisted of the sealing of shafts and tunnels; execution of a leachate and aeration channel; evapotranspiration dams; installation of fences and safety signs; construction wetlands and aeration channels; installation of fencing and signage in the wetlands; construction of stream wetlands; revegetation, and finally, the implementation of a surveillance, control and monitoring plan. This contract was awarded to FR3E – Energia e Novas Oportunidades, Lda. for € 1,803,959.81 and had a duration of 365 days.
The investments were co-financed by the Cohesion Fund and allowed the environmental liabilities resulting from mining at this location to be resolved, bringing benefits to local populations through the improvement of current conditions and use of the areas reclaimed for other ends.