Modernisation financed by World Bank to be supervised by Electrowatt Engineering of Zurich working with two local companies. November 1999. The city is negotiating to borrow up to $1.5 billion for an ambitious scheme to extend the 36.5 km metro by 50 km by 2010. June 2000.  Bidders for Line A extension between Primera Junta and Flores are Benito Roggio; Techint; José Cartellone; Dycasa; Obrascí³n; CCI Construcciones; IEcsa and SADE-Skanska. 3.2 km tunnel and four stations at Puí¡n, Carabobo, Plaza Flores and Nazca with time frame of 36 months to cost US$80 million. Visit www.metrovias.com.ar 45/01.Buenos Aires has prequalified five groups to extend by 3.5 km metro line A, at a cost of US$36.1 million. The groups are: Benito Roggio e Hijos; José Cartellone; Dycasa; Skanska; and Techint. Line A, which was inaugurated in 1913 and was Latin America's first metro, has 14 stations and runs 7.13 km. The extension will run from the current southern terminus in Primera Junta through four stations in Puan, Carabobo, Flores and Nazca. Work is expected to begin by mid-2004 and finish in 2007. 50/03.Dycasa is the lowest bidder to build Line A extension from Primera Junta to Nazca, with a budget of USD95.2 million. Then follow Jose Cartellone with USD97.3 million, Benito Roggio with USD103.3 million, Techint with a bid of USD105.7 million and Sade Skanska with USD119.9 million. The extension is a 2,882 m tunnel. Construction will last 42 months, adding four new stations in Puan, Carabobo, Plaza Flores and the end station in Nazca. Visit www.dycasa.com 10/04.