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Primary works include construction of 500kV lines and a substation to run power from the 1.5GW Coca Codo hydro (expected startup in 2016) to Ecuador's largest cities Quito and Guayaquil, Celec said in a statement.
Other components include a 230kV line from the 487MW Sopladora hydro (expected startup in 2014) to cover demand in the south and a 230kV line from Coca Codo to oil facilities in the northeast.
Harbin has 1,185 days to execute the project with financing from the Export Import Bank of China.
Other bidders included Sinohydro, China National Electric Engineering and Xian Electric Engineering.
In Ecuador Harbin also is building the 350MW Minas-La Union hydro.