The West Valley City (Utah) Police Department concluded its search of a property in Scott Mills, Ore., Thursday, The Salt Lake Tribune reported.
The search is the latest effort to find the remains of Powell, who was last seen Dec. 6, 2009, at her Utah home.
Powell's husband, Josh Powell, was a person of interest in the case, but was not charged. He committed suicide last year after killing the couple's two sons.
Police said they did not find any sign of Susan Powell at the property, which was rented by her husband's aunt and uncle at the time of her disappearance.
Her father, Chuck Cox, said the bones are likely from an animal.
Wisconsin business offering 'therapeutic cuddling' forced to close
Britney Spears debuts 'Perfume' video