The Brickey is a small river that flows into Dungarvan Bay. Small boats used its lower, tidal reaches, but in the eighteenth century there was a proposal to link the Brickey to the Finisk, another small river that flows into the Blackwater south of Cappoquin.
Waterford County Museum, and others, believe that work began on that project in the mid nineteenth century and that a driveable track along the south bank of a stretch of the river was built as a towpath.
I have visited the river and looked online for further information; my conclusions (with maps and photographs) are here. However, I would welcome further information.
Irish waterways history 