Fla. Stat. § 7.13

The boundary lines of Miami-Dade County are as follows: Beginning at the southwest corner of township fifty-one south, range thirty-five east; thence east following the south line of township fifty-one south, across ranges thirty-five, thirty-six, thirty-seven, thirty-eight, thirty-nine and forty east, to the southwest corner of township fifty-one south, range forty-one east; thence north on the range line dividing ranges forty and forty-one east to the northwest corner of section thirty-one, township fifty-one south, range forty-one east; thence east on the north boundary of said section thirty-one and other sections to the waters of the Atlantic Ocean; thence easterly to the eastern boundary of the State of Florida; thence southward along the coast, including the waters of the Atlantic Ocean and the gulf stream within the jurisdiction of the State of Florida, to a point on the reefs of Florida immediately opposite the mouth of Broad Creek (a stream separating Cayo Lago from Old Rhodes Key); thence in a direct line through the middle of said stream to a point east of Mud Point, said point being located on the east line of the west one half of section seven, township fifty-nine south, range forty east, at a distance of two thousand three hundred feet, more or less, south of the northeast corner of the west one half of said section seven being a point on the existing Miami-Dade County boundary line as established by s. 7.13; thence run southerly along the east line of the west one half of said section seven, township fifty-nine south, range forty east, to a point two thousand feet, more or less, north of the south line of said section seven; thence run westerly along a line parallel to the south line of said section seven, through the open water midway between two islands lying in the west one half of said section seven to a point on the west line of section seven, township fifty-nine south, range forty east; thence run southerly for a distance of two thousand feet, more or less, to the southwest corner of said section seven; thence run southerly along the west line of section eighteen, township fifty-nine south, range forty east, to the southwest corner of said section eighteen; thence run in a southwesterly direction along a straight line to the southwest corner of section twenty-four, township fifty-nine south, range thirty-nine east; thence run southerly along the east line of section twenty-six, township fifty-nine south, range thirty-nine east, to the southeast corner of said section twenty-six; thence run southerly along the east line of section thirty-five, township fifty-nine south, range thirty-nine east, to a point of intersection with a line drawn parallel with the north line of said section thirty-five and through the open water midway between Main and Short Key; thence run westerly along a line parallel to the north line of said section thirty-five, through the open water midway between Main and Short Key to a point on the west line of section thirty-five and a point on the east line of section thirty-four, township fifty-nine south, range thirty-nine east; thence run southwesterly in a straight line to the southwest corner of the southeast quarter of said section thirty-four and the northeast corner of the northwest quarter of section three, township sixty south, range thirty-nine east; thence run southerly along the east line of the northwest quarter of said section three to the southeast corner of the northwest quarter of said section three; thence run westerly along the south line of the northwest quarter of said section three to the southwest corner of the northwest quarter of said section three; thence run westerly to a point on the northerly bank of Manatee Creek at the easterly mouth of said Manatee Creek; thence run westerly meandering the northerly bank of Manatee Creek to the intersection thereof with the west right-of-way line of United States Highway No