The Sodor Flour Mills is located between Killaban and Cabalnoo on the main line loop.
The mill has chutes that fill trucks with flour. Thomas onced used it to make himself covered in flour to scare Diesel after teasing him.
There is also a small yard where empty trucks are shunted when the mill is closed. Thomas asked James to help him collect the truck filled with flour.
The site is run by "Dusty" Dave.
It first appeared since the ninth season and last appeared in the tenth and the van appeared in the magazine story, Ready, Jet Set, Go!
It should not be confused with the Flour Mill on Edward's Branch Line.