As an island nation, marine and civil engineering shapes much of our lives.  Due to this and the four decades of experience our specialist involvement spans many major sectors across the UK.


Trading as specialists in the rail industry since 1989, we are experts in delivering challenging marine infrastructure solutions in ways which minimise disruption to rail services.

The rail sector division within Kaymac specialises in technical delivery, innovative expertise and sustainable solutions whilst demonstrating best practice, often against the clock during rail stoppages. When a rail track runs over a culvert, river or watercourse, Kaymac are experts in temporary works, inspection survey, repair and protection of structures in a watercourse. We are RISQS audited and verified; all Kaymac operatives are PTS (Personal Track Safety) trained to current legislation as specialist sub-contractors.

For more information regarding the specific sustainable solutions that we offer to the rail sector, please take a look at our Rail Engineering services page.

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Water Utilities

Over the years, Kaymac has gained valuable experience in inspecting, repairing, and installing sea outfalls across the UK.  Kaymac has sourced the best plant equipment and has the experienced personnel to enable us to offer our customers a complete utility asset solution, which cannot be found anywhere else.  We have gained valuable working knowledge of various working processes, installation plant, equipment such as Bolina Booms and materials which has enabled us to programme and deliver sustainable solutions for projects to strict timescales and budgets.

In recent years we have been involved in several reservoir Dam Spillway repairs and rehabilitation around the UK. We have also been involved in the temporary works installation at Prioress Mill pumping station.

We are framework contractors for DWR Cymru/Welsh Water and Wessex Water as well as having strong long-term relationships with Anglian and Bristol Water.

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Marine Ports and Harbours

Kaymac started out in 1976 supplying diving services to ports, harbours and shipping agents. We are still the first choice for this industry, but now we service clients across the UK not just for diving operations, but the full sustainable package: Diving, civil engineering, marine construction and mechanical solutions. 

Kaymac are specialists in the inspection, repair, conditional reporting, installation and removal of lock gates and have carried out numerous projects ranging from locations in inland waterways to large container terminals. For many years, Kaymac has been retained by the Bristol Port Company, providing lock gate services in Avonmouth and the Royal Portbury Dock. We regularly provide underwater lock gate inspections including condition reports for cills, cill rubbers, quoins, mitres, pintles, bolts, masonry and all subsea components both visually where possible or by touch to test for integrity, strength and fouling.  We are also DENSO Pile Wrapping approved installers.

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Since we were established, Kaymac have been contracted by power stations around the UK.  This includes being involved in the design and installation of a cofferdam and fish deterrent system at the largest gas fired power station in Europe, Pembroke Power Station.   In order to reduce the amount of fish entering the cooling water intakes and entering the fish return system, we supplied sustainable solutions to this project. We have also been involved in the commissioning of Hinckley Point B and early contractor involvement a Hinckley Point C, as well as being contracted for marine civil works for the decommissioning of Magnox sites.

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Climate change is increasing pressure on maritime, coastal, and waterway infrastructure and assets. This means our clients National Resource Wales, The Environment Agency and their delivery partners need a contractor whose approach focuses on sustainable solutions such as repairing and minimising current and evolving risks. Our approach towards environmental projects involves us using the natural environment to help reduce coastal erosion and river flooding, whilst protecting the wildlife and natural environment.

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Highway structures that runs over a watercourse or culvert, Kaymac’s Civil Engineers can ensure the safety and stability of the structure by devising robust sustainable solutions. From culvert clearance to temporary floating access systems, Kaymac will have a solution to the waterway problem.  We have been involved in the underwater inspection and repairs of many NMWTRA (North and Mid Wales Truck Road Agency), SWTRA (South Wales Trunk Road Agency) and Highways England structures that include bridges and retaining walls.

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For more information regarding our specific services pages, please click here.