As salmon and steelhead swim upstream, they’re now facing one more challenge in fish ladders. It’s a non-native fish competing for space: the American shad. At Lower Granite Dam on the Lower Snake ...

BONNEVILLE DAM — The U.S. Army Corps of Engineers is gutting and rebuilding a large section of Bonneville Dam’s fish ladder to make it easier for Pacific lamprey to pass the dam as they return from ...

BONNEVILLE DAM, Columbia River, Wash. — There is a new king of the Columbia. Each spring, a chrome tide of fish native to the East Coast floods the Northwest’s mightiest river by the millions. Shad, ...

Adult fall-run Chinook salmon congregate near the Nimbus Hatchery Fish Ladder on the American River in Sacramento County in this October 2012 file photo. (Photo by Carl Costas/California Department of ...

Leaping over small man-made jumps and swimming determinedly upstream in Alameda Creek, a small group of bright red chinook salmon are back from the Pacific Ocean and ready to spawn. Twenty miles ...

The lower half of a fish ladder at Bonneville Lock & Dam in Cascade Locks remains unchanged as upgrades focus on the upper section. A new $8 million project at the Bonneville Lock & Dam aims to make ...

As soon as it rains, coho salmon likely will swim up a small creek to a spawning ground in the west Sonoma County hills that has been impassable to the species for decades. When they come to the ...

Courtesy of Matt Mais / Yurok Tribe Chinook salmon are spawning in streams above four former dam sites on the Klamath River in numbers that are astounding biologists. Now, a network of tribes, ...

Removal of the fish ladder and culvert was part of a court mandate to make salmon-bearing streams easier for spawning fish to ...