The Rapel Dam is an arch dam on the Rapel River about 19 km (12 mi) north of La Estrella in the Libertador General Bernardo O'Higgins Region, Chile.

[3] The dam withstood the 7.5 Mw 1985 Rapel Lake earthquake with only minor damage.

The dam's spillway is controlled by five tainter gates and has a discharge capacity of 10,000 cubic metres per second (350,000 cu ft/s).

The dam's reservoir, Lake Rapel has a 700,000,000 cubic metres (570,000 acre⋅ft) capacity of which 530 million cubic metres (430,000 acre⋅ft) is active capacity.

The power station, located at the dam's base, contains five 75.4 megawatts (101,100 hp) Francis turbine-generators and is afforded 76 metres (249 ft) of net hydraulic head.