The River Cart Aqueduct, sometimes known as the Blackhall Bridge, is a railway bridge and former navigable aqueduct in Paisley, Renfrewshire, Scotland. It opened in 1811 as an aqueduct to carry the Glasgow, Paisley and Johnstone Canal over the White Cart Water. Following the closure of the canal in 1881, it was converted to a railway bridge in 1885, and now carries the Paisley Canal Line. It is registered as a Category A listed building by Historic Environment Scotland.