Ala. Code § 45-2-11

(a) The boundary between Mobile County and Baldwin County is hereby defined as follows, to wit:

Beginning at a point at the three mile limit in the Gulf of Mexico, said point designated by Alabama State Coordinates, North 53,249.34, East 330,549.12; thence on a grid bearing and distance of N. 0° 12′29.8″ E., 27,750.84 feet to a point in the center of the existing ship channel between Fort Morgan and Dauphin Island; thence on a grid bearing and distance, N. 5°59′52.32″ E., 113, 115.77 feet to a point of intersection with the arc of a curve, said curve having a radius point with grid coordinates of, North 188,705.16, East 348,236.48, said curve having a central angle of 7°00′31.74″, and a radius of 7,497.60 feet; thence along the arc of said curve to the right 917.16 feet to the point of reverse curvature of a curve to the left having a radius of 6,758.40 feet; thence along the arc of said curve to the left 5,238.49 feet to the point of tangency; thence on a grid bearing and distance of N. 2°19′11.76″ E., 27,516.37 feet to the point of curvature of a curve to the left having a radius of 82,375.03 feet; thence along the arc of said curve to the left 9,468.04 feet to the point of compound curvature of a curve to the left having a radius of 5,280.00 feet; thence along the arc of said curve to the left 6,149.77 feet to the point of tangency; thence on a grid bearing and distance of N. 75°38′21.96″ W., 686.40 feet to the point of curvature of a curve to the right having a radius of 1,372.80 feet; thence along the arc of said curve to the right 2,558.58 feet to a point in the center of the Tensaw River; thence northwardly along the center of the junction of the Tensaw River and the Spanish River to a point in the center of the Spanish River, thence northwardly along the meanders of the center of the Spanish River to its junction with the center of the Mobile River; thence continuing northwardly along the meanders of the center of Mobile River to its junction with Little Lizzard Creek; thence northeastwardly along the meanders of the center line of said Little Lizzard Creek to its junction with Middle River; thence northwardly along the meanders of the center line of said Middle River to its junction with the Tensaw River; thence northwardly along the meanders of the center line of said Tensaw River to its junction with the Alabama River and the Tombigbee River; thence northwardly along the meanders of the center line of the Tombigbee River to its intersection with the Washington County Boundary Line in Fractional Section 6, Township North, Range 1 East.

(b) That the South boundary of Mobile County, Alabama, from the West boundary of Baldwin County to the East boundary of Jackson County, Mississippi, is herby defined as follows:

Beginning at a point on the Alabama three mile limit in the Gulf of Mexico south of Fort Morgan, said point being designated by Alabama State Coordinates North 53,249.34, East 330,549.12; thence westwardly along said Alabama three mile limit in the Gulf of Mexico to the boundary line between the State of Alabama and the State of Mississippi.

(c) That the South boundary of Baldwin County, Alabama, from the East boundary of Mobile County to the West boundary of Escambia County, Florida, is hereby defined as follows:

Beginning at a point on the Alabama three mile limit in the Gulf of Mexico south of Fort Morgan, said point being designated by Alabama State Coordinates North 53,249.34, East 330,549.12; thence eastwardly along said Alabama three mile limit in the Gulf of Mexico to the east boundary line between the State of Alabama and the State of Florida.