Federal officials have issued their final court-ordered plans for making Columbia Basin hydroelectric dams safe for endangered salmon.

NOAA Fisheries concluded on Moday that without any changes, the dams will jeopardize the survival of 13 threatened and endangered species of salmon and steelhead - but that they can thrive with additional help. Those measures include modifications to the dams themselves, changes in dam operations, hauling young salmon around some of the dams, expanded and improved hatchery operations, predator control and improvements to river habitat.

It will be up to a U.S. District Judge in Portland to decide whether the plans – known as biological opinions – meet the demands of the Endangered Species Act.

(AP)