Durant opened up in late 2006/early 2007 after a ton of delays. It subsequently closed because it didn't make any money. The buzz on the street was that DM designed the plant to harvest maximize federal and local government subsidies for biofuel production and not run run the plant at maximum cost efficiency.
Be that as it may, given the track record of more modern plants, it most likely wouldn't have mattered because there are no margins in the soy-bean based bio-diesel business.
EVFL is talking about using a different feed-stock and I don't know how they are doing with that.