The Case Studies

A160/A180 Port of Immingham Improvement

Costain and Highways England


The Site History

The Port of Immingham on the southern bank of the Humber Estuary is the UK’s largest port by tonnage. To stimulate growth and unlock economic benefits in the area, Highways England has proposed to provide better access to the Port of Immingham and the surrounding area by improving the A160 between the junction with the A180 at Brocklesby Interchange and the Port. The company has been commissioned to carry out various works on the A160/A180 Port of Immingham Improvement Project for Costain and Highways England.

The Project Overview

• Upgrading Brocklesby Interchange to an oval two bridge roundabout layout, a dedicated left turn lane for vehicles traveling from the eastbound A180 to the A160• Upgrading the single carriageway section of the A160 to

• Upgrading the single carriageway section of the A160 to dual carriageway standard

• Relocating Habrough Roundabout to the west of its current position, with new link roads provided from the A160

• Closing the central reserve gap at the junction with Town Street and partially closing the gap at the entrance to the oil refinery

• Provision of a new road bridge at Town Street to provide vehicle and pedestrian access

• Provision of a new rail bridge

• Provision of a new gyratory carriageway system




The Scope of Works

Gattica Associates Limited scope of works consists of the following:

  • Temporary and permanent protection to three Anglian Water potable water mains (900, 800 and 450mm diameter)

  • Diversion of a 300mm diameter Anglian Water Sewer

  • Temporary protection and permanent diversion of two National Grid HP mains and one IP main (this involved procuring the new parts six months in advance to be pre-fabricated in China and shipped to the UK)

  • Temporary protection of 1050mm diameter HP National Grid Gas Transmission main

  • Undergrounding of Northern Powergrid 33kV overhead cables

  • Diversion of Northern Powergrid oil filled 33kV cables

  • Permanent diversion of 200mm diameter Air Products oxygen supply pipeline

The benefits Gattica brought to the project

The following benefits to the client have been identified within this programme. The company’s early engagement with HE and Costain and its understanding and relationships with the affected statutory bodies and various apparatus owners ensured that all parties worked collaboratively to identify best design practice to ensure program surety and cost savings. Seasonal outages were avoided at an early stage by ensuring that orders were placed early.

The company has successfully negotiated protection measures wherever possible and kept the utility diversions to program and budget with strong management avoiding program slippage to the start of the main construction works.

Costain and Highways England

“The skilful management by Gattica significantly contributed to Highways England’s banking a £2m efficiency saving on the scheme directly attributable to the management of Statutory Undertakers during the construction phase (equivalent to 2.5% of Scheme Budget).”

Ben Ridgeon
Project Manager
Highways England


Find Out More

For more information about Gattica Associates Limited, what we do and how we can help you, please contact us.


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