Grimes-Crotts Mill, also known as Eureka Mills, Old Mill, Crotts Mill, is a historic grist mill located near Reedy Creek, Davidson County, North Carolina. It was built between 1870 and 1880, and is a 2 1/2-story, frame mill on a foundation of fieldstone and massive timber pilings. It is sheathed in plain weatherboard and has a monitor roof. The mill machinery was removed in 1937.It was added to the National Register of Historic Places in 1984.