Kaymac Marine & Civil Engineering Ltd

Name: Kaymac Marine & Civil Engineering Ltd
Address: Swansea, SA12NX, GB
Telephone: +441792301818
Price range: $$

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Kaymac Marine & Civil Engineering Ltd

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We’re a multi-award-winning specialist marine civil engineering contractor with a well-earned reputation in our field.

Kaymac Diving Services was established over three decades ago, in 1976, and traded for a number of years, primarily supplying underwater engineering services for a limited client base. The company was bought out by the present management in the late 70’s, and continued to expand the client base with diving as the main core activity. The increasing demands from clients for work other than diving, mostly marine engineering above water, led the management to change the company name to Kaymac Diving and Marine Services, and the company continued to flourish under the new title. In 1994, a decision was made to enter into a new field; that of land based civil engineering. This was as a direct result of experience gained in the marine engineering sector, which had proved a great success and had allowed continued expansion of the company and exposure to new clients outside the confines of the diving and underwater engineering sectors. The company name was changed once again to embrace all disciplines; and Kaymac Marine and Civil Engineering Ltd were launched in October 1994.

13/10/2026

Extending an existing otter route sounds straightforward, until the work has to take place within a live watercourse. 🌊

Kaymac was commissioned by Knights Brown to extend an existing concrete otter ledge through Clydach Brook Culvert in Neath.

This formed part of two otter mitigation schemes delivered in the area, with the conditions at each structure calling for a different engineering approach.

For this installation, the team had to contend with a live watercourse, restricted access down a steep embankment and an adjacent public right of way that needed to remain safely managed throughout the works.

Our technical approach included:
🔹 Diverting the brook with a temporary sandbag bund to create a near-dry working area
🔹 Installing downstream sediment controls and using a submersible pump to manage water ingress
🔹 Removing spalled blockwork and resin-fixing steel starter bars into the existing abutment and invert
🔹 Measuring and fabricating bespoke plywood shuttering on site, including a continuation of the existing drainage pipe
🔹 Placing and vibrating approximately 1.2m³ of structural concrete before completing local finishes after curing

Once complete, the new concrete section integrated with the existing ledge to provide a continuous passage through the culvert while maintaining its hydraulic function.

The second scheme called for a completely different solution. Stay tuned to see how our team approached the works at Gwrach Brook..

Got an otter mitigation project requiring specialist in-water works? Talk to our team. 💬

07/10/2026

Wetter weather is coming. The question is: is your infrastructure ready for it? 🌧️

For 2026/27, the Welsh Government has committed more than £85 million to flood and coastal erosion risk management, the highest annual allocation to date. Almost £43 million is directed towards capital schemes, alongside further investment in smaller flood works, natural flood management and coastal programmes.

That investment comes at an important point in the year.

The Met Office has warned that this year’s strong El Niño could bring a wetter, stormier autumn and early winter across the UK.

For flood and water infrastructure, that means greater pressure on the assets already in place.

Culverts, drainage routes, screens, outfalls, gates and other water-control assets need to be ready to perform when rainfall increases and systems come under greater strain.

That is where planned inspection, maintenance and refurbishment become critical.

The best time to identify debris, sediment build-up, deterioration, restricted flow or access issues is before poor weather exposes them.

If you’ve got flood assets that need attention before wetter weather sets in, talk to our expert team today. 💬

06/10/2026

🌱 Supporting our local community | Gwyrosydd Primary School

We recently donated a selection of wooden pallets, timber offcuts and plastic piping to Gwyrosydd Primary School, helping with the renovation of their outdoor areas.

Our friends at Gemmak Engineering also got involved, donating additional materials to the school.
Rather than these materials going to waste, it’s great to see them being reused to create an outdoor space for the pupils to enjoy. ♻️🌳

A big thank you to the team at Gwyrosydd Primary School for putting everything to good use. We’re looking forward to seeing how the garden develops, so keep an eye on our page for an update!

We’re always pleased when we can support our local community, particularly when it gives surplus materials a useful second life.

05/10/2026

Drainage can be easy to overlook when everything appears to be performing as expected.

But September is a timely point to give it a closer look.

The Met Office has confirmed that El Niño is continuing to strengthen towards a winter peak, with its influence expected to increase the chance of wetter, stormier conditions across the UK during autumn and early winter. Earlier seasonal guidance also identified October to December as the period in which the event could become particularly strong.

For infrastructure and maintenance teams, that makes this month a useful window to review drainage condition, identify any restrictions and plan maintenance before the wetter part of the season takes hold.

So consider this your nudge not to leave drainage until heavier rainfall starts affecting performance.

Planning drainage inspection, clearance or maintenance works this autumn? Speak with Kaymac’s specialist team. 💬

01/10/2026

A wetter, stormier autumn could be on the cards. 🌧️

The Met Office has indicated that the current El Niño is expected to increase the likelihood of wetter, stormier conditions across the UK during autumn and early winter.

It does not mean flooding is inevitable, but it is a timely reminder for asset owners to review the condition of the infrastructure relied upon during prolonged periods of wet weather.

That may include:
✅ Checking drainage routes and outfalls
✅ Identifying debris or sediment build-up
✅ Reviewing the condition of screens, pumping stations and other water-control assets

Planned preventative maintenance gives teams the opportunity to identify issues early, plan the appropriate intervention and reduce the need for reactive works later in the season.

Got autumn inspection or maintenance works coming up? Speak with Kaymac’s specialist team. 💬

24/09/2026

Happy World Maritime Day, LinkedIn network! ⚓

Today is a timely reminder of the people, skills and infrastructure that keep the maritime sector operating safely and reliably.

Across ports, harbours, shipping, coastal infrastructure and marine engineering, good practice is shaped by sound judgement, technical knowledge, strong communication and the ability to apply standards properly in real working environments.

It is also a chance to recognise the many teams working behind the scenes to maintain and support the assets the maritime sector relies on every day.

We’re proud to be part of that wider community and to work alongside so many people contributing to it. 👏

23/09/2026

Rail infrastructure doesn’t stop at the waterline!🚆

The September edition of Rail Director is out, highlighting the people, projects and specialist expertise supporting the UK rail network.

At Kaymac, our role in rail is often where conventional access becomes difficult — bridges over water, scour-affected structures, culverts, underwater assets and infrastructure requiring specialist temporary works or commercial diving support.

Our directly employed multidisciplinary teams bring together:

🔹 PTS-certified commercial divers and operatives
🔹 Underwater inspection and structural assessment support
🔹 Scour protection and remediation
🔹 Bridge and culvert repairs
🔹 In-water civil engineering
🔹 Bespoke temporary works and access solutions
🔹 Underwater cutting, welding and fabrication
🔹 Delivery within possessions, tidal windows and live operational environments

It’s specialist work, but it plays an important role in maintaining, protecting and extending the life of critical rail infrastructure.

Great to see the breadth of expertise across the sector showcased in the latest edition of Rail Director.

👉 Read the September edition here:
https://issuu.com/raildirector/docs/rail_director_september_2026

If you have a rail structure in, over or adjacent to water that needs inspection, repair or protection, talk to Kaymac!

22/09/2026

Just 3 days to go until the ICE Wales Cymru Awards 2026. 👏

Kaymac is proud to be supporting this year’s awards, celebrating some of the best civil engineering projects delivered across Wales.

We’re looking forward to joining colleagues from across the industry in Cardiff and recognising the engineering, collaboration and expertise behind this year’s nominated projects.

With such a strong range of work being recognised, it should be a brilliant evening for the Welsh civil engineering community.

Who else will be joining us at The Marriott on Friday? We’d love to see you there!

21/09/2026

2026 has already given us plenty to reflect on. 👏

Being named Specialist Contractor of the Year at the New Civil Engineer Awards was one of them, particularly in a year that also marks 50 years since Kaymac was founded in Swansea.

That recognition was never about one person or one project. It reflects the skill, commitment and determination of our people, as well as the trust of our clients and the support of the partners and suppliers we work alongside.

As we head towards the final quarter of the year, it feels like a good moment to reflect on how far the business has come, from our commercial diving roots to the multidisciplinary marine and civil engineering work we deliver across the UK today.

We are proud of what has been achieved, grateful to everyone who has played a part in that journey and still very much focused on what comes next.

A meaningful year so far, with plenty still ahead.💫

18/09/2026

Debris can be the first thing you notice, but not always the only issue at play.

A throwback to our project at Newydd Bridge in Trecastle, where a substantial build-up of debris was identified alongside cutwater failure and notable riverbed scour, creating an urgent need to stabilise the structure and protect public safety.

Kaymac’s initial response focused on clearing the watercourse, installing temporary stabilisation and protecting the failed cutwater while the wider condition of the bridge was assessed.

Further investigation then informed a more permanent engineering response, including submerged rock bags, layered rock mattresses and modular propping beneath the bridge to support the structure and enable a controlled reopening.

It is a good example of why debris clearance should sometimes be viewed in the context of the wider asset, particularly where flow, scour and structural condition are all interacting.

With wetter weather approaching, consider this a timely reminder to review known debris build-up before it begins affecting access, flow or the condition of surrounding infrastructure.

Got a similar challenge on your network? We’d be happy to discuss the options with you. 💬

Address

Swansea
SA12NX

Telephone

+441792301818

Website

http://www.kaymacmarine.co.uk/

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