Map Shem Oirere/ENR Art Department Nava Bharat will start work this year on a new $650-million powerplant at the mouth of Zambia's biggest coal mine, Maamba Collieries. Singapore-based Nava Bharat will start work this year on a new $650-million powerplant at the mouth of Zambia's biggest coal mine, Maamba Collieries, about 410 kilometers southeast of the capital, Lusaka. The mine has been dormant since 1997, but it was re-opened by the country’s president, Rupiah Banda, on July 8.Construction of the 300-MW plant at the state-owned facility is scheduled to be finished by 2014. A second 300-MW phase could be built
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.