CANEY CREEK (Washington County). Caney Creek rises six miles west of Chappell Hill in Washington County (at 30°08' N, 96°21' W) and runs southeast for sixteen miles to its mouth on the Brazos River, at the juncture of the Washington, Austin, and Waller county lines (at 30°04' N, 96°09' W). The creek forms a large part of the Washington-Austin county line. Caney Creek flows through gently to moderately sloping terrain surfaced by clays and fine sandy loam soils that support grasslands. Land near the creek's mouth is cropland.