to refer to the entire Lubumbashi–Lobito route, rather than the Tenke–Lobito section to which it strictly applies. In its heyday, the Benguela Railway was the shortest way to transport mineral riches from the Congo to Europe. The line proved very successful and profitable, especially in the early 1970s after Zambia closed its border with the then Rhodesia. The railway reached an operational peak in 1973 when it transported 3.3 million tons of cargo, generated freight revenues of $30 million, and had 14,000 employees. Until the early 1970s, the railway was operated entirely by steam locomotives, oil-fired from the coast to Cubal, and then wood-fired from Cubal to the interior. Wood was supplied by eucalyptus trees grown on company-owned tree plantations. Steam locomotives outnumbered diesels as late as 1987. Soon after Angola gained its independence from Portugal in 1975, the Angolan Civil War broke out. The railway was heavily damaged during the war and progressively fell into disuse. The workshops in Huambo were destroyed. Ballast cars had to be coupled to the front of locomotives to detonate mines. By 1992, only of the railway remained in operation. When the 99-year concession expired in 2001, only remained in service, along the coast from Benguela to Lobito. Rehabilitation The railway was 90% owned by Tanganyika Concessions (Tanks), a London-based holding company. Société Générale de Belgique purchased a minority share in Tanks in 1923 and acquired a controlling interest in 1981. The Belgian company remained the controlling owner of the railway when the concession expired in 2001, at which point ownership of the railway passed to the Angolan government. After the Angolan Civil War ended in 2002, the railway was reconstructed between 2006 and 2014 by the China Railway Construction Corporation at a cost of $1.83 billion. 100,000 Angolans were employed on the railway reconstruction. Trains reached Huambo in 2011, Kuito in 2012, and Luau near the Congolese border in 2013. The rebuilt railway was formally inaugurated in February 2015. According to Jornal de Angola in May 2012, Empresa do Caminho de Ferro de Benguela-E.P. employed 1,321 workers, and transported 129,430 passengers and 5,640 tons of goods in 2011. Two trains per day run between Lobito and Benguela, one per week to Huambo, and three per week between Lobito and Cubal. On 5 March 2018, ore transport was restarted from the Tenke Fungurume Mine, in the DRC, from where copper and cobalt are extracted,