Work in Progress, Net (Tables)

12 Months Ended

Dec. 31, 2019

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Summary of Work in Progress

At December 31 this account comprises:

	Total				Current				Non-current
	2018		2019		2018		2019		2018		2019
Unbilled receivable concessions in progress		32,212		23,117		—		—		32,212		23,117
Work in progress		28,538		49,457		28,538		49,457		—		—
		60,750		72,574		28,538		49,457		32,212		23,117

Summary of Work in Progress Grouped by Main Projects

Below is the work in progress grouped by the main projects:

	2018		2019
Infrastructure
Road operation and maintenance		32,212		23,117
		32,212		23,117
Engineering and construction
Engineering and Construction Works - GYM Chile S.p.A.		13,007		19,531
Talara Refinery		—		20,126
North Concentrator Plant of Quellaveco		—		1,033
Others		15,531		8,767
		28,538		49,457
		60,750		72,574