The historic weir collapsed in late 2014 having being built in the 1790s to divert water to the local gunpowder mills. It had been in a state of disrepair for years prior to the collapse.
Its deterioration meant the weir was rendered accessible to the public. The weir was then blocked off from public use by Cork County Council but locals merely scale the railings to walk directly onto it.
Catryn Power, a retired Cork County archaeologist said repair costs for the weir have spiralled in the last 18 years due to a lack of action.