Duff Cemetery Barren Co., KY Located on the Everett farm north of the Barren River Dam. Turn west in front of the home of Sonny Calhoun (1/2 mile north of the dam). Follow a field service road approximatety .4 mile. The cemetery is located on the left side of the road in a wooded area. All stones are yet standing. There are several unmarked graves thought to be that of slaves. The Duff are some of the oldest people with marked stones in Barren County.