More than £10 million worth of upgrade works are being carried out at Lochmaddy Pier in North Uist.
Western Isles Council has awarded the contract to marine, civil engineering and building contractor, L and M Keating Ltd.
They will be responsible for completing all civil engineering works for the harbour upgrade, including pier strengthening and extension, land reclamation and seabed dredging.
The project will begin this month and is expected to be completed in spring 2021.
CalMac will continue to operate ferry services throughout.
The works are part of the Skye Triangle Infrastructure Project, which involves significant harbour upgrades at the ports at Tarbert, Lochmaddy and Uig.
They are designed to improve and modernise harbour facilities and prepare the way for new vessels.
Minister for Energy, Connectivity and the Islands, Paul Wheelhouse, said: “I am very pleased to see the planned upgrade of Lochmaddy Pier moving forward with the award of this contract, following the recent award of the contract for construction works at Tarbert on the Isle of Harris.
“Work can now begin on the construction phase, which will deliver an improved experience for the passengers who use these important services.
“Transport Scotland continues to work with Western Isles Council, The Highland Council and CMAL in the delivery of our ambitious plans for the facilities at the three ports through the Skye Triangle Infrastructure Project.
“I look forward to seeing this project help further improve connectivity from and to the Western Isles, with subsequent benefits for the local economy.”