Members of the the Save Cork City campaign staged a 'picnic' beside the River Lee on Sunday.
The picnic on North Mall highlighted the group's opposition to the OPW flood protection plans.
The proposed Lower Lee Flood Relief Scheme will take ten years to complete and will cost up to €140m.
But critics say the measures will destroy much of Cork's riverside heritage and could actually increase the flood risk to the city centre.
Video Larry Cummins
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