Tawnaghmore 110kV ESB Substation

Client

ESB Networks

July 2015 – April 2016

Duration

Background

The original Tawnaghmore Substation required upgrading due to the new Mayo Renewable Power CHP plant also based in Killala. Mayo Renewable Power is a nominal 40MW export rated IPP power plant firing biomass. The construction of this plant also involves a 110kV ESBN connection to adjacent upgraded ESBN Tawnaghmore 110kV substation, two existing 50MW peaking GT plants and a future windfarm.

Scope of Work

Installation of earth grid to 110kV compound.
New storm water drainage system with soak away and in-bund oil interceptors.
New foul drainage system which includes a treatment unit and percolation area.
Installation of new watermain to the 110kV compound.

Challenges

The main gravity sewer pipe to the pump station is constructed across very poor ground conditions which required a floating type design for the pipes and included one river crossing requiring fluming and over pumping. The storage tank and pump tank required breaking out large volumes of limestone rock in a flooded area with close proximity to the local river.

The Outcome

The project was handed over on time, on budget and to a very high standard which was to the satisfaction of the Client which was highlighted at our final project review meeting.