Construction work has started on the £60m Pembroke Dock Marine project at Pembroke Port.
One of the nine projects in the Swansea Bay City Deal, the first phase of the project will see the construction of a new supersize slipway and workboat pontoons at Britain's biggest energy port, owned and operated by the Port of Milford Haven.
Civil engineering firm BAM Nuttall has been appointed to construct the new slipway and pontoons.