It hasn't been operational in 15 years.
A RTE radio mast, which has towered above Offaly for 50 years, is being demolished.
The red and white structure in Ballycommon has been in place since 1973 and will be taken down tomorrow.
The Grand Canal, between Campbell's Bridge and Lock 22, will be closed from 10.30 until lunchtime to faciliate its removal.
The mast has not been operational since 2008.
Offaly Green Party councillor Mark Hackett says it's been part of the skyline since he was a child:
Ticket Prices Set To Rise For National Ploughing Championships
Taoiseach Warns Of Threats To Energy And Communication Cables
Irish Farmers To Join EU-Wide Protest In Brussels
Four Men Released Without Charge After Midlands Prison Assault Arrests
Community Mourns Mary Holt As Colleagues Lead Funeral Procession In Edenderry
Calls Grow For 24 Hour Garda Station In Edenderry After Arson Attack
Appeal Date Set For Jozef Puska Over Murder Of Ashling Murphy
Offaly Town Demands Meeting With Garda Commissioner And Justice Minister
Ireland’s First Kidney Pancreas Transplant Recipient Dies Aged 68
Quality Of Life To Drive Offaly’s Appeal For Foreign Investment - Anna Marie Delaney
Hundreds Of Mourners Gather For Tadgh Farrell's Funeral
Dancing With The Stars ‘A Once In A Lifetime Opportunity’ - Rose Of Tralee
Uisce Éireann To Submit €6b Water Project Plan
Pedestrian Killed In Midlands Crash
Maura Higgins Set For Traitors US
Man Taken To Hospital Following Alleged Westmeath Assault
Osteoarthritis Programme Launched At Midlands Hospital
Laois County Fire And Rescue Service Welcomes Two New Fire Appliances
Offaly TD Welcomes New IDA Ireland Investment