Over-engineered? The unique Grand Canal overflow

By The Helpful Engineer / On / In Historic Buildings

Canal overflowA unique piece of engineering heritage lies along the banks of the Grand Canal near Sallins, County Kildare. It is a complex circular overflow device constructed from stonework. According to The Inland Waterways Association of Ireland (link below) it is the only example of this type in Ireland. It is probably 200 years old.

It is particularly interesting from an engineering prospective, as whenever it is mentioned in publications, it is usually described as unnecessarily complex and over-engineered. One reference I remember, but that I haven’t found a link for yet, even described its purpose as a mystery!

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