Yes if this is a public marina the ownership of the marina should be able to post it if they wanted to. One would assume if their customers, the tenants who rented the slips requested that they do so to better avoid damage to their boats that they would at least consider doing so.


From the KDFW:

Q: Is fishing allowed around a dock or a marina?
A: It depends. Public marinas on U.S. Army Corps of Engineers Lakes have contractual agreements that address lease space on public waters. The Corps presently allows the marina owners or operators to post signs that prohibit fishing within 150 feet of their floating structures. These agreements do not prohibit a person from fishing in their boat rental slip. This policy does not apply to privately owned boat docks on Corps lakes.