Morlais Onshore Electrical Connection Package

A design and build of the onshore infrastructure for the tidal energy project in Holyhead, Anglesey.

Works included:

• Landfall substation design and build containing nine bays, ancillary buildings, and transformer bays
• Sustainable drainage systems (SuDS), which featured a surface water drainage system that included an attenuation pond and flow restriction devices to meet agreed discharge rate
• Onshore connector cable route design and build comprising 6.4km of trefoil ducting, 132kV cable installation, and 11 joint pits
• Extensive traffic management including road closures and diversions
• Horizontal directional drilling (HDD) in rock including watercourse crossings
• Grid connection substations