The Cathaoirleach of Cavan County Council has "put farmers on notice" about what he labels the "very serious situation" with Eirgrid regarding the North-South Interconnector.
Clifford Kelly told a recent County Council meeting he wanted to "tell all farmers about Monaghan", where he claims "Eirgrid is going into people's land without permission".
Planning approval for the North-South Interconnector was recently approved in Belfast's High Court.
Back in April, EirGrid's chief infrastructure officer said the company would seek to assign contractors following the outcome of the judicial review.
Clifford Kelly told a recent County Council meeting he "wanted to put this on the record" that EirGrid is "trying to go onto people's land without permission" in Co Monaghan
He "put all farmers on notice" and also warned farmers to "lock and barricade your gates".
It follows a statement by the North East Pylon Pressure Campaign which claims "EirGrid, ESB, and their agents are skulking around trying to access your lands without your knowledge or without seeking your permission".
The NEPPC encouraged people to "lock up your lands where access to pylon locations are proposed".
In a statement to Northern Sound News, an EirGrid spokesperson said "ESB Networks is currently undertaking minor works in relation to the North-South Interconnector project".
These works are said to "include walkover surveys and drilling of boreholes and are being undertaken by contractors working on ESB Networks' behalf and with the prior consent of landowners, obtained by EirGrid".
EirGrid also says this "follows submission of planning compliance notices to each affected local authority".
Clifford Kelly told Northern Sound that EirGrid hasn't corresponded with Cavan County Council on planning issues since August, and that he stands by the claims he made in the Council Chamber.