The lawsuit alleges an unknown amount of oil stored and used at the dam enters the Columbia River without monitoring and other controls required under the federal Clean Water Act.
The blooms, sometimes called blue-green algae, are caused by toxin-producing bacteria and often form a green paint-like scum on the surface of the water thaht can cause health problems for humans and can kill livestock.
The ruling was the second major court decision in as many months concerning salmon habitat in the Northwest.
Irrigators in Southwestern Idaho and a small part of Eastern Oregon who get their water from the Boise Project Board of Control are looking at a good water year.
A farmer plans to challenge a court ruling that his tillage operations violated the Clean Water Act.
Officials are trying to restore salmon runs upstream of a 20-mile dam complex operated by Portland General Electric.
A decision by the Idaho Supreme Court changes has raised questions about how senior water right holders will be treated in future water calls.
The policy focuses on active stewarship to ensure current uses and provide for future needs.
A bill by U.S. Rep. Jeff Denham, R-Calif., seeks to remove fish population requirements for striped bass in the Sacramento-San Joaquin River Delta. The bass are a non-native predator fish that are known to feed on endangered native salmon and smelt.
University of California researchers believe there could be an upsurge in field crop producers' use of overhead irrigation systems, which are becoming nearly as efficient as drip systems and are cheaper to operate and maintain.
The 2016 water outlook for irrigators in Southwestern Idaho is still good, although some water supply managers are a little concerned about a recent drop in river levels.
New Mexico officials said Tuesday the EPA misrepresented test samples taken after the spill to make water quality look better than it was.
Environmental interests dominated the first of seven public hearings to be held on a draft sustainability policy that will be added to Idaho's state water plan.
A Smithsonian Institution traveling exhibit highlighting the importance of water to the state has opened at the Idaho Falls Public Library and will move to six Idaho cities before leaving the state next spring.