Africa's tallest tower planned to rise 99 stories in Addis Ababa, Ethiopia, by 2017. Ethiopia’s capital city, Addis Ababa, may boast Africa’s tallest building by 2017. While a 58-story building had been announced, plans unveiled by a private Chinese developer now call for a 99-story office-hotel tower. Guangdong Chuanhui Group has not revealed the building's estimated cost or other details, including financial arrangements or the names of the architect and engineer.The site for the Chuanhui International Tower is at the new Addis Ababa Exhibition Centre. The developer says it has acquired the 41,000 sq meter site and the building plans
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.