The driver of a crane at roadworks on the N16 at Glenfarne, Co. Leitrim, has been taken to hospital after the machine collapsed into a river.
His injuries are not thought to be serious.
A major operation will be taking place later to remove the crane and motorists are warned there could be traffic disruption in the area.
The incident happened on the Sligo/Manorhamilton road at Glenfarne, where road realignment works are being carried out.
Traffic diversions are expected to be in place later when the collapsed crane is being removed.
A spokesperson for Leitrim County Council says two other cranes will have to brought to the site to remove the collapsed crane.
And in order for those cranes to work, a platform will have to be built up to support them.
The spokesperson says there is a lot of advance work to be done.
A meeting is to take place about now between council workers, the contractors and others involved to discuss the situation.
It’s expected details of a plan of action, including times of road closures, will be available after this morning’s meeting.