Workers validated 350 machines to put into 116 polling places in the city for the November 4th election. Both the touch screen and optical scan machines are undergo 'logic and accuracy' tests. Election officials say state law requires that the machines be tested but it's also about being transparent with the public.
"It's to give the public a sense of trust that the process works and we do have testing measures to put in place to do that. They can actually see what they are and feel more confident when they're able to vote in the polling place," said Ken Franklin, the Deputy Democratic Director for the St Louis City Election Board.
There are about 180,000 registered voters in the city of St. Louis. Officials are projecting about a 25% turnout in the city.