An environmental group is to bring a legal challenge against Roscommon County Council's updated plans to drain water away from Lough Funshinagh.
The group is alleging that Roscommon County Council CEO Eugene Cummins is in contempt of a previous court order concerning remediation works in the south Roscommon area.
It has also called on him to resign his position.
Earlier this month Roscommon County Council restarted works at Lough Fuinshinagh to drain water away from the flooded turlough via a system of pipes.
The Council claimed that it did not require any special planning permission for the interim emergency flood relief works, which will extract 2 million cubic metres of water, to a stream west of Lough Ree.
The recommencement of works came after the original proposal for an overflow pipe was withdrawn following a High Court action by the Friends of the Irish Environment in August.
This afternoon, the group claims the Council is to face an order alleging contempt of court in the High Court this Friday with the organisation suggesting that the pipes laid in the summer were to be capped and manholes already installed were not to be used.
FIE now claims that the work which began this month is a "manifest breach of the Remediation Plan" and is an alleged breach of a court order.
It also suggests that the order CEO of Roscommon County Council Eugene Cummins assigned earlier this month giving permission for the works to go ahead has no legal basis and he should resign his position.
Roscommon County Council has been contacted for comment.