Mississippi Code Title 1. Laws and Statutes § 1-3-31

Except as otherwise provided in Section 27-109-1, all rivers, creeks and bayous in this state, twenty-five (25) miles in length, and having sufficient depth and width of water for thirty (30) consecutive days in the year to float a steamboat with carrying capacity of two hundred (200) bales of cotton, are navigable waters of this state and public highways.