The Haitian government has estimated it will take 10 years and $3 billion to repair the damage caused by Jan. 12’s magnitude-7 earthquake, although some warn it may cost more than three times that amount. Slide Show Photo: Photo: GEO-CAN Port-au-Prince and surrounding areas heavily impacted by the Jan. 12 quake were broken down into 2,006 cells and evaluated by a virtual network of expert volunteers. Buildings were identified as geo-referenced objects, to which condition grades and annotations were attached. By the time a United Nations–hosted international donors conference convenes in New York City in late March, planners expect to
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.