In 1961, Engil’s activity until then centred in the region of Lisbon starts spreading to other regions within Portuguese territory through the adjudication by the Escola Industrial e Comercial (Industrial and Commercial School) of Castelo Branco, Portugal and the construction, in Mirandela, of the Bridge over the Tua River.
Tua Station is located in northern Portugal, close to the confluence between the Douro and the Tua River.
The Tua line was a narrow gauge railway which closely followed the banks of the river.
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