S.A. de Obras y Servicios, COPASA is a Spanish company engaged in the construction, maintenance and operation of roads, highways and tollroads in Spain and other countries. The company also operates water supply and drainage networks, drinking water treatment plants and wastewater treatment plants, and maintains green areas. In addition, it is involved in the manufacture of concrete sleepers for railway lines, and collection and treatment of urban waste. The company was founded in 1985 and is headquartered in Ourense, Spain. COPASA was awarded the Rodoanel Norte highway project in Brazil.