China and Zimbabwe have signed a $400-million hydroelectric-power infrastructure deal for the expansion of the 55-year-old Kariba South power station in the 180-billion-cubic meter reservoir-capacity Kariba dam, one of the world’s largest. Public Domain Image By Ben Bird The 55-year-old Kariba dam impounds the 280-km-long Kariba Lake and straddles the border between Zambia and Zimbabwe. Both countries now are involved in powerplant expansion projects at their respective ends. “We have signed an agreement with China’s Sinohydro Corp. for the expansion of Kariba by an additional two 150-MW units,” Noah Gwariro, managing director of the Zimbabwe Power Co., said in Harare
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.