Yes, tanks are probably from Grayling although I hear they will sometimes load them in Midland too.
The flat cars at the end of the train look like they are for vehicle frames. CN delivers frames to Flint for truck and bus but I am not aware of CSX delivering frames. So I am wondering if there is a place around flint that builds the racks that go on the frame flat cars.
Ann Arbor Railroad Technical and Historical Associationhttp://www.trainweb.org/annarbor/
Avatar picture posted with authorization by author and photographer, Jerry Pinkepank. Thanks to Michael D. Harding for getting approval.