Crews wrapped up the search on Saturday without finding anything.
Most of the search was along a ten-mile stretch downstream from Red Wolf Crossing Bridge.
Asotin County Sheriff's Detective Jackie Nichols said they might start searching again, but only if they have enough resources. She said she isn't sure when that would be.
Anderson disappeared in 2010. Her estranged husband, 52-year-old Charles Capone, is scheduled to stand trial next week in Latah County Second District Court in connection with her disappearance.