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I think I've been reading that most collections from libraries have only been reporting to TU. Good thing for you is that it's only on TU. Other than lines of credit that would require pulling from all three (mortgage, Navy Credit Union CC's, car loans etc), you probably won't have many companies pulling reports from TU.
Who's your CA? Is it a paid collection?
I know. I could kick myself for my past stupidity for such little things.
Who's the CA? Maybe someone here has a insider hookup for getting it deleted from all of them? It's also possible you could get the library to get the CA to delete it for you. Might have luck there. GW them. And don't give up if you get denied on your first GW try. Keep at it.