TENAHA CREEK. Tenaha Creek, also known as Tancha Bayou, is formed by the confluence of Porter and Huana creeks six miles southeast of Center in southeastern Shelby County (at 31°45' N, 94°07' W). The stream flows in a northeasterly direction for twelve miles to its mouth on Flat Fork Creek (at 31°51' N, 93°58' W). The soil varies from sandy to clayey and loamy, and the terrain varies from nearly level to moderately steep. The area is heavily wooded, with pine and various hardwoods predominating.