There have been many arguments by engineers throughout the years for and against a weir on this part of the Clyde,which is a short walk upriver from the famous Bromielaw.The first tidal weir was completed in 1901,it lasted until 1941 when its foundations gave way.
The present steel weir was completed in 1949 [Engineer FGM Stoney] the weir carries large diameter pipes across the Clyde,but its main purpose is to maintain upstream water levels.