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The Obama administration is offering its latest plan for making 14 hydroelectric dams that provide cheap electricity for the Northwest safe for salmon.

The NOAA Fisheries Service on Monday released a 751-page draft of the court-ordered plan known as a biological opinion.

Since 14 species of salmon came under the Endangered Species Act's protection in the 1990s, the federal government has spent billions to modify the dams themselves, divert water from turbines and restore habitat.

Federal judges have found that eight previous plans violated the Endangered Species Act.

The last plan was struck down in 2011 for depending too much on habitat improvements and failing to consider the possibility of breaching four dams on the Snake River in Eastern Washington to return the river to natural conditions.

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