Grupo Graña y Montero S.A.A. is a Peruvian infrastructure holding company made up of 26 firms with presence in seven Latin American countries, and permanent operations in Chile, Peru, and Colombia. The group has four main business segments: engineering & construction; infrastructure; property development; and services. It is currently developing major projects in Panama, Bolivia, Jamaica and Ecuador, and its activities comprise oil field operation; oil and gas drilling; hydrocarbons storage and distribution; operation of terminals and pipelines; natural gas processing; development of industrial projects, and highway maintenance and operation. In 2010 the company, together with Spanish firm Acciona S.A., it won a concession to build and operate the La Chira wastewater treatment plant. The facility treats a quarter of all the wastewater produced in Lima, spanning 18 districts and almost 3 million users. The company is also part of the Gasoductor Sur Peruano. The Lima-based company was founded in 1933 as Gramonvel S.A., and changed its name to Graña y Montero in 1949, after merging with Inversiones Industriales S.A.