RHODAIR BAYOU. Rhodair Bayou rises three miles northwest of Nederland in east central Jefferson County (at 30°00' N, 94°03' W). Intermittent in its upper reaches, the stream follows a southerly course for ten miles to its mouth on Taylor Bayou, two miles southwest of Port Acres (at 29°53' N, 94°04' W). The southern two-thirds of Rhodair Bayou comprises the western city limit of Port Arthur. The bayou cuts through generally clayey and loamy soils in its upper reaches, and saline soils become more dominant nearer its mouth. Rhodair Bayou was the object of extensive development during the 1960s and early 1970s as part of Jefferson County's effort to improve irrigation and drainage throughout the area.