Related Links: EPA Bristol Bay Profile EPA Study Says Pebble Mine Could Destroy Salmon's Habitat The Pebble Partnership is searching for another key investor to help fund its proposed Pebble Mine project in Bristol Bay, Alaska after international mining giant Rio Tinto gifted to two Alaska charities its 19.1% stake in the firm. A project spokesman says development of the mine, valued at $7 billion to $8 billion, will continue.Environmentalists oppose the mine, which would potentially include a large earthen dam and a containment pond to store up "tailings" waste from the gold, copper and molybdenum extracted. The project would
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.