I keep getting notices about voting from Benton County but my wife hasn't been. She's registered to vote or she thought she was. It looks like Benton County had a mishap and you might not be registered to vote like you think you are. 

Nearly 200 residents in Benton County have been affected after a voter software glitch at the DOL failed to register over 7000 people in the state of Washington.

There is a special election in Kennewick on February 14th, so you might want to check and see if you are registered  and good to go.

You can get more details on the mishap here