Easington Gas Terminal

EASINGTON GAS TERMINAL
GAS PIPE LANDFALL
SAIPEM

Stockton proved again why it is the contractor of choice for landfalls. A project in planning for many years, it was completed on time using a mixture of established traditional techniques and modern construction philosophies to construct and facilitate a gas pipeline installation helping to secure the UK’s energy needs.

THE PROJECT
Stockton was contracted by Saipem to conduct the onshore civil works of the Tolmount Area Development Project. The Tolmount field is located in block 42/28d of the North Sea, approximately 50 km north east of Easington, Humberside.

The Tolmount pipeline system comprises a 20” gas export pipeline and a 3” piggyback methanol pipeline. These pipelines will be routed from the Tolmount platform to the CSL Terminal at Easington – a total distance of approximately 48.6km.

SCOPE OF WORK
To facilitate pipeline installation from offshore to the tie-in point within the terminal, the permanent construction of a shaft and tunnel was required along with a temporary cofferdam and nearshore dredging activities. Stockton was also responsible for the onshore civil works and cofferdam construction.

The scope of work included the following main activities:
— Project management
— Cofferdam design
— Earthworks design
— Site preparation and survey
— Construction of haul road from cliff top to cofferdam
— Construction of haul road from public road to winch location
— Costal erosion mitigation
— Cofferdam construction and excavation
— Winch back anchor installation
— Backfill and site reinstatement

INTERESTING FACTS
— Over 20,000m3 of earth dug to facilitate access to the beach.
— Over 500 linear metres of sheet piling installed.
— Winch with 550 tonne pull capacity used to facilitate the pipeline into the cofferdam and tunnel.

PROJECT SUMMARY

  • Landfall of a gas pipeline
  • Over 30,000m3 of earth moved to facilitate access to the site
  • 197m long cofferdam constructed into the North Sea
  • 550 tonne linear winch used to pull 3km of pipe

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