A1L2B Drainage

Client: Carillion Morgan Sindall JV

Value: £1.5m
Location: North Yorkshire
Contract Period: 48 weeks
Contract Type: NEC3 Subcontract Option B


The A1 Leeming to Barton upgrade replaced the existing dual carriageway with a new three lane motorway. It also included the provision of a new local access road alongside the new motorway, a new grade separated junction at Catterick, and an improved junction at Scotch Corner to provide access to the strategic road network. 
The 12-mile section of the A1 between Leeming and Barton carries between 59,000 to 69,000 vehicles per day, and previously had poor alignment with many side road junctions, and farms and field accesses.
Howard Civil Engineering was awarded the drainage works to four of the outfalls of the scheme, with further outfalls released as work commenced on-site.

Scope of works

  • Over 12,000m surface and combined water drainage ranging from 300mm dia to 900mm dia
  • Over 11,000m of french and filter drain
  • Over 900m rising main 150mm dia to 300mm dia
  • Over 500no. manholes and catchpits up to 2100mm dia and 3.5m deep


More from A1L2B

Praise from our stakeholders

'I would personally like to thank your team for the commitment to the scheme when working around these residential properties. The behaviours of the people involved was exceptional and a credit to your business.'
- David Lowry, Client Project Director

Related News 

- George Osborne and Rishi Sunak visit the A1L2B site


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