A local anti-pylon campaigner says there are still questions surrounding the final cost of the North-South Interconnector.
When asked in the Dáil yesterday, Communications Minister Eamon Ryan estimated it would be €230 million.
However, Eirgrid says the full project on both sides of the border will cost €286 million.
The cost of the project has been in the spotlight recently, with Eirgrid issuing a statement to Northern Sound News earlier this month to dismiss claims by the North East Pylon Pressure group of a difference in the cost per kilometre north and south of the border.
The energy operator said the calculations didn't account for the construction of a substation in Tyrone which has an unknown cost of "tens of millions of euro".
Speaking to Northern Sound News, Nigel Hillis from the Monaghan Anti-Pylon Committee said there's a wide variance in the claimed cost of the programme and people want answers: