An environmental group says it plans to sue two federal agencies, claiming a public lands management plan adopted last year for more than 17,000 square miles in Nevada amounts to "ecological disaster" for nearly a dozen protected species.

In a filing sent this week to the Bureau of Land Management and Fish and Wildlife Service, the Center for Biological Diversity gave 60-day notice of its intent to sue over the Ely Resource Management Plan unless measures are taken to remedy what it says are violations of the Endangered Species Act.