巴达霍斯省
The region is well-irrigated with a number of dams and reservoirs, and with more 3,400 million cubic meters, it is the province with the third highest water storage capacity in Spain, second only to the Province of Badajoz and the Province of Cáceres. Of particular note is the Almendra Dam, five kilometres from the village of Almendra. Constructed between 1964 and 1970, the dam forms part of the hydroelectric system known as "the Duero Drops", along with the Castro, Ricobayo, Saucelle and Villalcampo. It is one of the largest reservoirs in Spain with an area of and 2.5 billion cubic metres of water. The dam itself is more than half a kilometre wide and, at a height of , it is one of Spain's tallest structures.