All surface waters of this State shall be protected for water contact recreation, fishing, and protection of aquatic life and wildlife. For interstate waters, these classifications apply only to those waters within this State. A stream segment is a distinct portion of a sub-basin. If the stream segment limits are specified as beginning at a specific point, streams terminating downstream of this point are not included in the same segment. For example, “Deer Creek and all tributaries above Eden Mill Dam” does not include Little Deer Creek.