The company which runs ports in South Wales including Newport is investing £3.6m across the region.
The Queen Alexandra lock has guarded the Port of Cardiff since 1905, now, as part of the investment across the region the inner lock gates have been replaced.
Over the next three months, the outer gates at Port Talbot will also be replaced and the gates at Barry will undergo major refurbishment.
The lock gate replacement programme at the Port of Cardiff represents £2m of the total investment, which will see both the North and South inner lock gates replaced.
ABP director South Wales Matthew Kennerley said: “The replacement of the lock gates is essential in maintaining our key operational assets to ensure the port continues to operate efficiently.
"We handle more than 12 million tonnes of cargo every year across our South Wales ports and welcome a wide variety of businesses and customers through the lock on a daily basis.
“The new gates will secure a safe, resilient and effective lock operation for many years to come ensuring the Port of Cardiff remains open for business for Wales and beyond.”
The new gates are designed and constructed by Dutch specialist contractor Ravestein who recently completed the Special design, construction, installation, testing and commissioning of new Lock Gates at ABP’s Port of Grimsby.
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