A Leitrim County Councillor is seeking to bring a High Court challenge against An Bord Pleanala over its handling of a major streetscape enhancement plan for Mohill.
Des Guickian claims the works could result in potential pollution to the River Rinn from dust and run-off created by works.
The independent Carrick-on-Shannon M.D representative is hoping to bring judicial review proceedings against An Bord Pleanála over its decision last March that an assessment of the Mohill plan was not required under the EU Habitats Directive.
This would assess whether or not the proposal is likely to result in significant adverse effects to the integrity of any neighbouring areas of conservation.
The River Rinn, which is a designated natural heritage area, runs under Main Street, Mohill, and is upstream from Lough Forbes which is in a special area of conservation.
Cllr Guckian was unhappy with Leitrim County Council's Mohill "public realm scheme" to improve the town centre, including relocation of street lighting and furniture and improving landscaping.
He believes the works are likely to cause a discharge of dust, rubble and other material which he claims will make its way into the drains and waterways and contribute to what he believes is the "ongoing pollution" of the river, local lakes and bog areas.
He asked the board last January for a determination as to whether an appropriate assessment under the EU Directive should be carried out but the board refused.
Earlier this month a barrister for Cllr Guckian, asked Mr Justice Charles Meenan for permission to bring judicial review proceedings in a one-side-only represented application.
The judge directed the board and Leitrim County Council, which is a notice party, that they should be put on notice of the application and the matter could return before him next month.
