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  • Northside West

Irish Water to submit multi million euro drainage plan

Thursday, 18th May, 2017 6:00pm

Story by Jack Gleeson
Irish Water to submit multi million euro drainage plan

The proposed project will be located along the Tolka River Valley in Blanchardstown between Parslickstown and Mill Road.

Irish Water to submit multi million euro drainage plan

The proposed project will be located along the Tolka River Valley in Blanchardstown between Parslickstown and Mill Road.

IRISH Water is  submitting a planning application for a €50 million drainage project aimed at improving local sewage treatment and preventing uncontrolled overflows at River Tolka.

The proposed project, which is also designed to eliminate flooding in Mulhuddart, will be located along the Tolka River Valley in Blanchardstown between Parslickstown and Mill Road.

The proposed Blanchardstown Regional Drainage Scheme will upgrade the existing sewer network serving Blanchardstown as well as surrounding areas including Mulhuddart, Castleknock Dunboyne, Clonee, Ashbourne and Ratoath.

The planning application to Fingal County Council also includes a new pumping station at Waterville close to Mill Road.

Irish Water says the project will expand the existing capacity of the wastewater network in the area to facilitate future residential and commercial growth.

“The project will also benefit the environment as the increased sewer capacity will reduce the frequency and volume of overflows of untreated wastewater from the network into the River Tolka,” a spokesperson said.

The proposed scheme will include construction of approximately 3.2kms of new sewer pipelines using trenchless tunnelling techniques alongside the existing sewer network between Parslickstown and Mill Road.

Underground storage tanks with a total combined capacity of approximately 30,000 sq mts and a new below ground pumping station with an above ground control room will be built on the site of the existing Tolka Valley Park Pumping Station at Waterville near the Mill Road.

Also included in the plans are a new control building to house all electrical switchgear, an odour control unit, a generator room and an ESB sub-station.

During the project local sewer and utility diversions will be carried out to facilitate construction of the storm water storage tanks and the Tolka Valley Park Pumping Station. 

Once the project is complete the area will be fully reinstated to match its original condition.

The existing sewer network was originally constructed in the Tolka Valley in the 1970s to serve Blanchardstown, Mulhuddart and Castleknock.

Since then, the local catchment area has undergone significant growth and the sewer now serves additional towns in County Meath including Dunboyne, Clonee, Ashbourne and Ratoath.

“The existing sewer network does not have the capacity to serve the needs of this fast growing population and is subject to flows which results in untreated wastewater overflows from the sewer network to the River Tolka,” an Irish Water spokesperson said.

Irish Water carried out site investigation works on the proposed route last autumn.

Wastewater Infrastructure Manager, Paul Fallon, said Irish Water was pleased to be progressing the project.

“Irish Water is committed to investing in the wastewater treatment infrastructure in Blanchardstown to support the needs of this fast growing population,” he added. “The investment will benefit the environment as once completed there will be fewer overflows of untreated water to the River Tolka.”

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