The 19th century weir is a protected structure, however it has fallen in disrepair in recent years and needs significant work to restore it.
The County Council say water flowing freely over the weir is leading to significant erosion and prevent fishing from migrating upstream.
Locals say the weir is on the brink of collapse and say repair works are urgently needed.
Anyone wishing to submit feedback can do so via fermoyweir.com, or by post to the Municipal District Office at Fermoy Town Hall.
Submission can be made until the 4th of December.
