 Mill Creek is formed in the northwestern portion of the district, by the confluence of Little Mill Creek and the Elk Fork, both flowing from the east.Little Mill Creek begins in western Roane County, and gathers a number of tributaries, the largest of which is Frozencamp Creek, also flowing out of Roane County.The Elk Fork gathers a number of tributaries from both sides of the Roane County line, and flows northwest until it joins with Little Mill Creek.