Outfall and discharge infrastructure associated at Mullagh Wastewater Treatment Plant, Mullagh

Proposed development

permission for development consisting of outfall and discharge infrastructure associated with the Mullagh Wastewater Treatment Plant (WwTP), located within the townland of Rosehill County Cavan and Seancarnan, Moynalty, Kells, County Meath. As part of the works, it is proposed to increase the treatment capacity of the Mullagh WwTP from 3,000 population equivalent (PE) to 3,400 PE to meet the 25 year design horizon. Upgrade works at the Mullagh WwTP shall consist of the following: • Inlet Works o Upgrade of the pipework within the existing forward feed pumping station. • Primary Treatment, including: o Dual stream activated sludge aeration tank with auxiliary pipework & blowers. • Secondary treatment, including; o Mechanical upgrade of the existing secondary settlement tank including replacement of the existing pipework, bridge, sludge collection equipment, etc. o Construction of new Secondary settlement tank. • Discharge works, including: o Final effluent pumping station; o 1.365km effluent rising main along the Mullagh Road (R194) towards the Moynalty River including discharge manhole and headwall. • Sludge treatment works, including: o Mechanical upgrade of the existing sludge holding tank including replacement of the existing pipework, etc. o Construction of a new sludge import facility including sludge import screen and sludge import pumping station. o Scum pumping station. o Return activated sludge (RAS) pumping station. o Waste activated sludge (WAS) pumping station. o Sludge drying reed beds. o Mixed liquor returns pumping station. • Chemical Treatment including bulk storage and chemical dosing equipment for the following chemicals: o Alkalinity (NaOH). o Ferric Sulphate. • 1 No. MCC Control building including backup power generator and associated fuel storage tank. • Decommissioning and demolishing works of the following: o Imhof tank and associated pipework o 2 No Trickling filter tanks and associated pipework etc. • Solar arrays including ground mounted structures and control equipment etc. • Ancillary site works, including: o Installation of instrumentation, monitoring equipment & controls in accordance with [name removed]’s technical standards. o Potable water kiosk and pumps o General groundworks, site clearance, topsoil stripping, fencing, landscaping, ducting, pipework, manholes / chambers and drainage works including for filter

Planning status

Permission was granted on 1 Sept 2026. The four-week appeal period has passed with no appeal recorded, so the permission is final. Works can start once a commencement notice is lodged; the permission normally runs to Sept 2031 (estimate).

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