Brimstone supports flood defence work at MOD Shoeburyness

Brimstone UXO has deployed a team of specialists to MOD Shoeburyness, providing vital support for a flood prevention scheme on the island. This highly complex site presents a unique set of challenges. Not only is it a live firing range, but extensive research indicates a significant risk of contamination from German unexploded ordnance (UXO).

A long-term project with multi-phase involvement

Our involvement with this project began two years ago, when we were commissioned to conduct UXO risk assessments, push-cart surveys, and provide consultation services. Drawing on our expertise, we developed a comprehensive risk mitigation strategy tailored to the site’s unique conditions.

This strategy involved utilising existing UXO risk assessments and reviewing ground investigation data to inform our recommendations. We also produced detailed response procedures and methodologies to support the safe execution of the flood defence work. To minimise UXO-related risks, we advised splitting the site into sections, enabling a phased and controlled approach. Each section would undergo a combination of UXO risk mitigation services, carefully selected based on the site’s characteristics, the nature of the ground intrusions, and the anticipated UXO threats.

The work at Shoeburyness is part of a Ministry of Defence (MOD) initiative to strengthen sea defences on Shoebury and Foulness Island. Without these critical repairs, the weapons testing range faces an increased risk of flooding. The project includes raising the sea wall through piling, reinforcing flood bank stability, and improving access tracks to allow for better maintenance of the flood defences.

UXO risk mitigation in action

Once the UXO risk had been thoroughly assessed, we deployed a team of engineers to deliver four targeted services designed to support the flood defence works. Each service was carefully selected to align with the known UXO risk, ground composition, and the depths and nature of the intrusions.

The first service involved a UXO Search and Clear operation along the proposed access tracks. Our engineers systematically cleared lanes using advanced search equipment, marking, excavating, and logging any targets identified. This methodical process ensures that all ferrous anomalies are properly investigated and either ruled out or dealt with.

In areas where ground intrusions would be shallower than four metres, we conducted a Non-Intrusive UXO Survey followed by target investigations. Using state-of-the-art equipment, our team detected ferrous anomalies beneath the surface. The technical data was processed in-house by our geophysics specialists, while the engineers on-site investigated any modelled targets, ensuring no threat was left unchecked.

For deeper ground intrusions exceeding four metres, we deployed two intrusive survey rigs. One of these was a Brimstone crawler rig, specifically designed for UXO clearance in challenging terrain. The other was an excavator-mounted rig, capable of accessing and surveying areas with more complex ground conditions.

UXO discoveries and disposal

Throughout the project, our explosives engineers have uncovered several pieces of ordnance, including a 105mm high-explosive (HE) projectile and a 28lb solid shot. Each item was safely removed and disposed of by the MOD, in line with strict safety protocols.

Our teams will continue their work on-site, systematically mitigating UXO risks and supporting the flood defence project. By maintaining strict adherence to safety procedures and conducting thorough clearance operations, we aim to provide the client with their ALARP (As Low As Reasonably Practicable) certificate. This certification will allow the flood defence works to progress with confidence, ensuring the safety of both the workforce and the public.

Comprehensive UXO risk mitigation services

The project at MOD Shoeburyness showcases Brimstone’s full suite of UXO risk mitigation capabilities. From initial risk assessments and site surveys to target investigations, clearance operations, and disposal activities, we have delivered end-to-end support. Additionally, our consulting services have provided the client with expert guidance throughout the project, helping them navigate the complexities of working in a UXO-contaminated environment.

If your project requires UXO risk mitigation, reach out to our commercial team today. Our experts are ready to provide tailored solutions that keep your site safe and compliant, no matter how complex the challenge.

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