FILE- This Feb. 27, 2017, file image provided by KCRA shows Oroville Dam's crippled spillway in Oroville, Calif. California is asking owners of about 70 aging dams – some dating back to the Gold Rush – to thoroughly inspect their spillways and underlying rock, as part of stepped-up inspections in the wake of the surprise spillway failures at the nation's highest dam. (KCRA via AP, file)
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