According to this article, both dirt and synthetic will exist:
https://www.rcnky.com/articles/2019/10/03/churchill-downs-buy-turfway-park-build-new-facility
New Turfway Park is anticipated to support up to 400 direct full and part time equivalent positions and create an estimated 800 direct construction jobs, the news release said. The project will include a historical racing machine facility featuring up to 1,500 machines, a state-of-the-art clubhouse, food/beverage venues and a new inner dirt track to complement the existing one-mile synthetic main race track.
That’s fantastic. I love Matt Bevin but he is wrong on this issue.