That isn't automatic. Each bridge was created by an act of Parliament or other provision. In each case, there are specific clauses on certain bridges, but not all the statutes provide that this kind of information should be shared with the federal government. Some administrations share this information willingly; others do so because they are required to do so by law. So information isn't shared in a standard manner.
On May 11th, 2006. See this statement in context.