ATLANTA -- A state senator running for Lieutenant Governor got another state contract last year. New documents obtained by 11alive news show that Senator Rick Jeffares did more than a half million dollars with of business with the state last year. Critics say it poses a potential conflict of interest.

Jeffares’ water and wastewater treatment business has done millions of dollars worth of business with the state over the years – and it’s perfectly legal because his job in the senate is a part time job, and because he won the contracts with sealed bids.

Jeffares is now running for the Republican nomination for Lieutenant Governor. Documents show the Henry County lawmaker made even more money off the state in 2016. The previous year, we’ve reported that Jeffares’ company has run water and sewer systems at four middle Georgia prisons, plus a DOT rest area near Savannah.

His 2016 disclosure shows a new $21,000 contract with a Georgia Correctional Industries in Milledgeville – a state facility that cans food produced by prison inmates. In 2016, Jeffares’ contracts in total were worth $504,000.

The contracts have also raised eyebrows as a potential conflict of interest, if he’s elected.

We spoke by phone to Jeffares around midday Thursday. As he told us in June, he says it’s still too early to decide what he would do with his state business if he gets elected Lieutenant Governor in 2018.