Among the most rapidly growing provinces in Argentina after 1945, the national government began the construction of the National University of San Juan, which opened its doors in 1973. Congress further responded to the needs of San Juan's growing agricultural sector by breaking ground in the mid '70s for the largest hydrostructural project in the province up to that point, the Ullum Dam and Reservoir. Inaugurated in 1980, it has contributed to the province's production of irrigated desert crops, like olives, figs and, most importantly, wine grapes.