Grand Ethiopian Renaissance Dam

The largest hydroelectric scheme in Africa, on the Blue Nile, and the most consequential current transboundary water dispute in the world.

Three Gorges Dam

The largest power station in the world by installed capacity, and one of the largest engineering interventions ever made in a major river.

Height
181 m
Installed capacity
22,500 MW
Completed
2012
Reservoir capacity
approximately 39.3 billion m³
Aswan High Dam

Gave Egypt multi-year storage on the Nile, ending the annual flood and the silt deposition that had sustained Egyptian agriculture for millennia.

Height
111 m
Completed
1970
Reservoir
Lake Nasser
Consequences
Flood control and year-round irrigation, at the cost of downstream silt, delta erosion and increased fertiliser dependence
Hoover Dam

The dam that created Lake Mead and made large-scale settlement and irrigation of the American south west possible.

Height
221 m
Completed
1936
Reservoir
Lake Mead
Generating capacity
approximately 2,080 MW