What Do These All Have in Common?

Q: What do all of the following creeks, streams and rivers have in common?

Big Spring, Blackberry Creek, Brush Creek, Buck Branch, Buffalo Creek, Capps Creek, Cedar Creek, Center Creek, Clear Creek, Cow Creek, Dry Fork, East Cow Creek, Elm Branch, Elm Springs Branch, Glendale Fork, Hickory Creek, Honey Creek, Indian Creek, Jenkins Creek, Jones Creek, Joyce Creek, Little North Fork, Little Shawnee Creek, Long Branch, Lost Creek, North Fork, Pettis Creek, Shawnee Creek, Shoal Creek, Spring River, Stahl Creek, Taylor Branch, Truitt Creek, Turkey Creek, West Fork, White Oak Creek, Williams Creek and Willow Creek.

A: They are all part of the Spring River Watershed. [In fact, there are even three more, unnamed tributaries: T26N, R32W, S28-unnamed tributary to Cedar Creek; T28N, R33W, S15-tributary to Center Creek; and T29, R29W, S15-tributary to White Oak Creek].