Onshore Cabling

Onshore Cabling

The High Voltage (HV) cable for the Walney Offshore Windfarm was laid in the highway from landfall at Thornton Gate to the substation at Hillhouse Industrial Estate (former ICI)

 

The length of the onshore cable route is 5km, split into seven x 75m sections.

 

Installing the cable for the Walney Offshore windfarm along Thornton Gate in Cleveleys
Installing the cable for the Walney Offshore windfarm along Thornton Gate in Cleveleys

 

The majority of the cable was laid in an open cut trench, approximately 800mm wide x 1.4m deep, with seven, equally spaced larger excavations where the lengths of cable were joined.

 

Jointing bay at Cumberland Avenue for Walney Offshore Windfarm cable
Shelter over the top of one of the jointing bays

 

Joining two pieces of cable inside one of the jointing bays
Joining two pieces of cable inside one of the jointing bay shelters

 

There were four teams of workmen, each team working in a different area along the route.

 

Workmen installing the cable for the Walney Offshore Windfarm

 

The trenches were barriered off and kept safe, and ‘Courtesy Boards’ were installed around the excavation with the contact details in the event that there were problems in your area.

 

Installing cable for Walney Offshore Windfarm on Cumberland Avenue

 

All the trenches were filled with a concrete layer for strength and stability, with tarmac over the top to match the existing road surface.

 

There were some big obstacles in the path of the cable – for example the tram tracks and the railway line at Hillylaid in Thornton, and the culverts at Trunnah Road. It wasn’t practical or possible to dig straight through some of them so the cable was tunnelled underneath, what’s called ‘Directional Drilling’ in the photo below.

 

HDD rig at TRunnah Road installing the cable for the Walney Offshore Windfarm

 

Route of the cable from shore to substation

 

Route of the Walney Offshore Windfarm cable from shore to substation

Walney Offshore Windfarm logoBalfour Beatty Utility Solutions logoZero Harm logo

 

Installing cable for the Walney Offshore Windfarm along Trunnah Road in ThorntonInstalling the cable for the Walney Offshore Windfarm along Trunnah Road in Thornton

 

Unfortunately, you can’t make an omelette without cracking an egg….

but disruption was kept to an absolute minimum, and we kept you well informed!

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