In 1999, the aqueduct and its surrounding lands were submitted to the "tentative list" of properties being considered for UNESCO World Heritage Site status. The aqueduct was suggested as a contender in 2005, its 200th anniversary year. It was finally announced in 2006 that a larger proposal, which covers a section of the canal from the aqueduct to Horseshoe Falls would be the United Kingdom's 2008 nomination.