 Mill Creek enters the Western District as it leaves Ripley, and meanders westward through a broad valley, turning northwest below Angerona, and continuing to Ripley Landing, where it abruptly turns southwest just short of the Ohio River, and continues across the floodplain for a mile before joining the river at Millwood.Mill Creek's main tributaries in the Western District include Sycamore Creek, which forks several times in the hills north of Ripley; Parchment Creek, which flows northward out of the southern part of the district; Cow Run, with its upper waters in eastern Mason County, flowing northeast into Mill Creek between Angerona and Cottageville; and Lick Run, which drains the hills east of Ripley Landing.The upper course of Sandy Creek is largely within the Northern District, although its upper waters also extend into western Roane County.