Article 4, Section 4:
The United States shall guarantee to every State in this Union a Republican Form of Government, and shall protect each of them against Invasion; and on Application of the Legislature, or of the Executive (when the Legislature cannot be convened) against domestic Violence.
And your point being?
Your citation does not change that Texas is violating the constitution with these barriers.
You want to argue the fed is also violating the constitution, that’s fine, but that doesn’t mean that a state can violate it as well.
Texas is free to sue the fed for violation of the constitution but they cannot also violate it as well.. impede navigable waters, is unconstitutional, Texas cannot do this.