Welsh civils firm Alun Griffiths has secured £25M of work on the project to build tidal power infrastructure in Swansea Bay.
The Abergavenny-based firm was named as preferred bidder for ancillary civil engineering duties on the Tidal Lagoon Swansea Bay scheme by promoter Tidal Lagoon Power.
Alun Griffiths will carry out breakwater surface; roads; slipways; utilities; and landscaping works on the public realm aspects of the £1bn renewable energy project.
The firm will use workers and materials from the local area for the contract.
Tidal Lagoon Power director of engineering and construction Andrew McNaughton said: “In delivering the early phase works for Tidal Lagoon Swansea Bay, Alun Griffiths will take us a step closer to realising our vision.
“Its use of a local workforce and materials underlines our commitment to the community of Swansea.”
Alun Griffiths executive director Martyn Evans said: “This is a major contract for our business and the lagoon will be an iconic piece of infrastructure for Wales.
“We’ve heard so much about the project and having now seen it at close quarters, I am convinced that the reality will be every bit as compelling as the vision.”
Dartford-based Laing O’Rourke was last week named as preferred bidder for the £200M contract to build the turbine house and sluice structure block for the Swansea scheme.
Tidal Lagoon Power’s bid to build a 9.7km sea wall in Swansea Bay is subject to planning permission and negotiations over a contract for difference