The company has directly contributed to the improvement of the ecological conditions of the region, developing different studies, projects, technical assistance and work management in all phases of Doñana 2005.
Amongst the actions performed by Ayesa, the project and the construction management of the retaining wall built along 13 kilometres to prevent pollutant sludge from entering the territory of the Doñana Natural Park is worthy of special mention. In a subsequent initiative, once it was confirmed that the Guadianar waters no longer contained heavy metals, the marsh has also been permeated to allow for the exchange of fresh and salt water, which creates perfect ecosystems for birdlife and wildfowl.
Other contracts consisted of studies and restoration projects of channels, such as Sotogrande and Sotochico or for the recovery of the territory and fluvial hydrology, as well as works addressing important actions such as the FAO wall, the Partido stream, the profiling of the Travieso pipe and the recovery of the Caracoles country estate, an old agricultural farm that is now incorporated into the National Park.
All these tasks were carried out with the advice of scientists of renowned prestige linked to the Doñana 2005 project.