Officials Dismissed Oroville Spillway Concerns in 2005, Documents Show
OROVILLE (AP) -- Documents show environmentalists raised concerns years ago about the stability of the emergency spillway at the tallest U.S. dam but state officials dismissed them, insisting the structure was safe. In a 2005 motion filed with the Federal Energy Regulatory Commission, three advocacy groups said using Lake Oroville's earthen spillway would cause significant erosion because it wasn't armored with concrete.