United Infrastructure (UI), our Engineering, Procurement and Construction contractor, is carrying out a series of preparatory works ahead of the Main Onshore Pipeline's (the Pipeline) auger boring programme.
Works have now moved into their next phase, with UI's construction team currently excavating 'reception' and 'launch' pits to the required depths (formation level) needed to safely carry out upcoming auger boring programme works.
Once complete, UI will hand over the site to its specialist tunnelling subcontractor, Joseph Gallagher Limited, who will be responsible for undertaking the Pipeline's tunnelling programme.
Reception and launch pit excavations are currently underway at numerous locations, with completion anticipated as:
Auger boring is a trenchless tunnelling technique that installs the Pipeline under the ground by pushing a steel casing or tube through the soil while a rotating helical auger (spiral tool) brings the soil out of the casing.
Further updates about the Pipeline's auger boring programme will be added onto the HyNet Hub Latest News section in advance of works starting.
Graphic detailing the auger boring process
Works have now moved into their next phase, with UI's construction team currently excavating 'reception' and 'launch' pits to the required depths (formation level) needed to safely carry out upcoming auger boring programme works.
Once complete, UI will hand over the site to its specialist tunnelling subcontractor, Joseph Gallagher Limited, who will be responsible for undertaking the Pipeline's tunnelling programme.
Reception and launch pit excavations are currently underway at numerous locations, with completion anticipated as:
- Chester Road (B5129), Deeside - due to complete week commencing 4 May 2026
- Parkgate Road, Saughall - due to complete week commencing 18 May 2026
- B5125, Northop Hall - due to complete week commencing 15 June 2026
- Connah's Quay Road, Northop - due to complete week commencing 22 June 2026
What is auger boring?
Auger boring is a trenchless tunnelling technique that installs the Pipeline under the ground by pushing a steel casing or tube through the soil while a rotating helical auger (spiral tool) brings the soil out of the casing.
Further updates about the Pipeline's auger boring programme will be added onto the HyNet Hub Latest News section in advance of works starting.
Graphic detailing the auger boring process