Papers and correspondence relating to Barmouth Bridge, damage to the structure by Teredo worms and its subsequent closure and repair including diagrams and photographs of the damage, papers relating to an unofficial report by Chris Wallis, a British Rail bridge engineer which contradicted the official report and led to a disciplinary case against him, correspondence with the Department of Transport, papers of CCLAG meeting relating to the closure of the bridge, correspondence with British Rail, Gwynedd County Council, Members of Parliament and newspaper reports.