The government of Argentina's San Luis province has spent 151mn pesos (US$37.7mn) on construction of the Saladillo dam in Coronel Pringles department.
The dam will store 1Mm3 of water and also includes a water intake, a main bulkhead, five secondary bulkheads and a sluiceway, according to the provincial website.
The structure is located on the Río V river, between the La Florida and Paso de las Carretas dams.
The project will increase available water supply for domestic use and irrigation, as well as helping improve river basin management, according to the release.
Work on the dam is currently 94% complete and scheduled to wrap up shortly.
The Saladillo dam will be the third to open in San Luis over the past six months. The Las Palmeras dam in San Francisco opened at end-November, and Villa del Carmen's Piscu Yaku dam was inaugurated in January.