Elecnor, S.A. engages in the infrastructure and concessions businesses in Spain and internationally. The company operates power transport lines and transformation substations; generates power from wind farms, as well as solar, combined cycle, and hydroelectric plants; and provides gas related services covering gas pipeline transportation and distribution. It also develops telecommunications infrastructures and systems; carries out turnkey projects covering electrification, signaling, interlock, communications, and control systems for railways, subways, trams, and trolleybuses; and offers technical, commercial, and ancillary services, as well as maintenance services. In addition, the company is involved in civil and industrial works, construction, and edification business; hydrological planning activities; operating water transportation and distribution networks; treatment and reuse of waste and sewerage; and water purification activities; and waste management, forestry, maintenance of green areas, street cleaning, and the maintenance and infrastructure conservation activities, as well as provides electromechanical systems; and turnkey solutions through its waste treatment engineering developments. Further, it acts as an installation contractor for buildings, cultural and recreational centers, airport and railway terminal buildings, hotels and hospitals, industrial plants, cogeneration and trigeneration plants, etc.; and designs, engineers, and develops solutions and integration systems in aerospace industry, and information and telecommunications technologies. Additionally, the company operates as a turnkey developer and operator of wind power farms; invests and develops solar photovoltaic and thermoelectric solar energy projects; and constructs and operates wastewater treatment plants. Elecnor, S.A. was incorporated in 1958 and is based in Madrid, Spain. Elecnor, S.A. is a subsidiary of Cantiles XXI, S.L.