Some 50 deaths have been reported so far this year.
Construction and gold dredging have made the river muddy, according to a green group.
A new study shows mainstream dams could wipe out the endangered species.
Some 900 residents have been moved so far to make way for the dam in northern Laos.
New twist in Sombath Somphone's disappearance six months ago.
Pregnant women have trouble getting to health centers to deliver their babies.
Police reveal 'no new developments' in their latest update.
An official says the project will go forward in August.
An environmental group says a nearby river is being polluted by toxic chemicals, a charge rejected by the mining company.