Ribarroja Dam (Spanish: Presa de Ribarroja, Riba-roja) is a concrete gravity dam located in the province of Tarragona, Spain, that impounds the Ebro.

Empresa Nacional Hidroeléctrica del Ribagorzana S.A. (ENHER) was mandated in 1955[1] by Instituto Nacional de Industria (INI) to build two dams on the Ebro near Mequinenza and Riba-roja.

[6] At full reservoir level of 70 (maximum 73, minimum 40) m.a.s.l.

the reservoir has a surface area of 21.52 (20.29)[3][7] km², a total capacity of 210 million m³ and a length of almost 50[8] km.

The maximum (average) depth of the reservoir is 34 (9.7) m.[4] The power plant contains 4 Kaplan turbine-generators with a total nameplate capacity of 262.8 MW.