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Ardmore Outfall


Ardmore 315MM HDPE Outfall

Ardmore 315MM HDPE Outfall, Ardmore Co Waterford

 

Client

Waterford County Council   

Principal Contractor

Sorensen Civil Engineering Contractors

Location

Ardmore, Co Waterford

Principal Scope of Works

715M of 315Outfall Trench Excavation & Placement

Duration

12 Weeks  March 2015 – May 2015

Complexity

Average - Difficult

Challenges presented

-          Trench excavation in open waters
-          250M of Rock breaking within the outfall trench alignment

Sorensen Civil were assigned as principal contractor for the Ardmore Waste Water Treatment Plant. This project and outfall pipeline was imperative for the Ardmore community in order to maintain the local beaches’ blue flag status.

Sorensen appointed Foyle & Marine Dredging as the contractor to construct and install the outfall 715M long outfall pipeline.

Foyle & Marine constructed and installed the 160M of the shore section first, thus creating the ideal location for the shore marine connection within the tidal range.

The marine section was dredged by the Backhoe dredger Aoibheann along with a transfer barge to carry the required rock breaking equipment. For complete dredging and rock breaking accuracy, the outfall alignment, trench information was uploaded to the Spud leg dredger Aoibheanne’s Prolec Pcx dredge system prior to commencement.

The 550M marine section including 150No of anchor block was constructed along the shore line in two sections as the marine trench was being excavated. Over two tides the marine sections were floated off the beach, connected to the shore section and lowered into the pre-dredged trench in a controlled manner. On completed installation the diffuser was installed and scour protection placed around the diffuser. The competed pipe alignment underwent a detailed dive survey prior to being backfilled with existing material.

The treatment plant was successfully commissioned later that year.

Project Ardmore Outfall Images

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline

Ardmore Outfall Pipeline