New sewerage pipeline to be built between Cobh and Monkstown

New sewerage pipeline to be built between Cobh and Monkstown
Irish Water said the practice of discharging raw sewerage into Cork Harbour will end by 2021.

Irish Water has awarded the contract for a new sewerage pipeline between Cobh and Monkstown as part of the €144m Cork Lower Harbour Main Drainage Project.

Once in place, the pipeline will pump wastewater from Cobh to the Shanbally Wastewater Treatment Plant for safe discharge to the lower harbour

The water utility, in partnership with Cork County Council, is working to end the decades-long practice of discharging raw sewage into the sea.

The pipelines will be installed through a horizontal drilling process that will take place between Cobh and Monkstown.
The pipelines will be installed through a horizontal drilling process that will take place between Cobh and Monkstown.

Today, the contract for the design and construction of the Cobh to Monkstown Estuary Crossing pipeline was awarded to O’Connor Utilities Limited.

Irish Water said the project will move them closer to their goal of treating the equivalent of 40,000 wheelie bins of raw sewage flowing into the harbour by the end of 2021, 

Since the project started, the amount of raw sewage discharging untreated into the harbour has halved, from the equivalent of 40,000 wheelie bins every day to 20,000 through the construction of the Shanbally Plant and connection of Crosshaven, Carrigaline and Shanbally in December 2016. 

Ringaskiddy was connected to the treatment plant in October 2018 and Irish Water said it expects to be treating the wastewater from Passage West, Glenbrook and Monkstown this Summer. 

Two pipes will be installed under the River Lee estuary between Cobh and Monkstown as part of the Estuary Crossing contract.

The pipes will be installed using a Horizontal Directional Drilling construction technique to reduce disruption to residents, businesses and road users and with the least environmental impact. 

The Estuary Crossing contract will take approximately one year to complete, and once the Cobh Networks Contract is complete in 2021, all Cobh town’s wastewater will be connected to the Shanballyplant by the Estuary Crossing pipeline for treatment before its discharge to the harbour.

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