Glanmire councillor Ger Keohane said he had been contacted by a number of locals expressing concern that the structure beside Hazelwood Shopping Centre could lead to a flood risk for people living in other parts of the village including the nearby Meadowbrook estate.
He said that, in recent days, machinery had been used to pile rubble into steel mesh structures in the Glashaboy River by the centre.
He said it appeared that a wall-like structure was being built in the river.
Mr Keohane contacted a number of officials including the county engineer, the OPW, and Inland Fisheries about the works.
Last night, an OPW spokeswoman confirmed work involving the placing of stone-filled gabion baskets into the Glashaboy River.
“There was a concern that these would increase the risk of flooding in the area — the area having been seriously affected by flooding in 2012,” she said.
“Our OPW engineer visited the site and met the owner of the property for whom the works were being carried out as well as a representative of the local residents association.
“It was agreed with the owner to have the stone-filled baskets promptly removed from the river and to seek advice from his own engineer about how to more appropriately address the problem that he needed to have addressed, without impacting on the river’s capacity to allow passage of water. OPW are currently preparing a flood relief scheme for this area in partnership with Cork County Council.”