With salmon migration blocked by Shasta Dam, a Tribe and agency scientists collaborate to bring them home.

Removing two aging Eel River dams known as the Potter Valley Project would benefit salmon, lamprey and people, but what happens next remains unclear.

Accumulating sediment in reservoirs is affecting how much water dams can hold back to supply water for drinking, irrigation and flood control.

We’ve got the word on an important new treaty, a victory against ag-gag laws, and two new threats to the massive Andean condor.

To anticipate the impacts of a historic river restoration, we need to understand how salmon, bats, insects, algae and other parts of the ecosystem are behaving today.

Better accounting can go a long way in establishing sound policy to tackle the climate crisis.

In north Brazil, the combined effects of a hydroelectric dam and earth-shifting livestock have altered the landscape — and upended peoples’ lives.

We also have good news and bad news about dams and coal, plus how science and renewable energy can support Ukraine.

Human activities have imperiled our waterways — along with almost one-third of freshwater fish and many other aquatic species.

A rare “orchid of the falls” plant has been declared extinct after a hydroelectric dam destroyed its only habitat. Could others soon follow?