The Kingsway Tunnel is a toll road tunnel under the River Mersey between Liverpool and Wallasey. It carries an average of 45,000 vehicles a day. Merseytravel commissioned Kier Business Services to rewire the tunnel and replace the lighting installation. We created the outline designs for all electrical (high and low voltage) systems and lighting layout/distribution arrangements within both tubes and the tunnel approaches to enable tendering and Early Contractor Involvement (ECI).

We worked alongside the contractor to complete the designs and quantify risks identified when we produced the outline designs. During the main contract period, we worked closely with the contractor to plan works and liaise with stakeholders. We witnessed all testing and commissioning activities, on and off-site.

During the works, the project team installed 75 miles of new cable and replaced the existing lighting with 1,600 efficient LED units with a lifespan of at least 20 years, reducing CO2 emissions by around 450 tonnes per year and saving up to £90,000 per annum on the electricity bill.

In coordination with the rewiring project, we also carried out a feasibility study on the tunnel’s pumped and gravity drainage systems. We produced a report recommending options and detailed engineering designs and specifications for the preferred option. The works will involve replacing approximately 5.5km of pipework. Merseytravel plans to begin construction of these works in 2019.

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