It all depends on how navigable water in defined. Seasonal stream flow is not considered navigable even if exceeds 30 feet in width.
This is from the TX Parks and Wildlife website:
Original Statutory Provision (effective December 14, 1837)
That all streams of the average width of 30 feet shall be considered navigable streams within the meaning of this act, so far up as they retain that average width, and that they shall not be crossed by the lines of a survey.
1 Sayles’ Early Laws of Texas, p. 271, quoted at 286 S.W. 466.
Current Statutes
Natural Resources Code§ 21.001. Definitions.
In this chapter ...
(3) “Navigable stream” means a stream which retains an average width of 30 feet from the mouth up.
Natural Resources Code§ 21.012. Surveys on Navigable Streams.
(a) If the circumstances of the lines previously surveyed under the law will permit, land surveyed for individuals, lying on a navigable stream, shall front one half of the square on the stream with the line running at right angles with the general course of the stream.
(b) A navigable stream may not be crossed by the lines of a survey.