Delivering geotechnical solutions in tight and challenging spaces is a core strength of ESS (CE) Ltd, and the Holt Street development was no exception. Working with MCI, we installed a permanent retaining wall system using an open bore Continuous Flight Auger (CFA) rig within the KPW system. Our experienced team combined precision engineering with decades of geotechnical expertise to complete the works safely, efficiently, and to the highest standards — despite the constraints of a restricted urban site.

Client: MCI
Location: Holt Street
SSP or KPW: KPW
Activity: Open Bore CFA Rig
Temporary or Permanent: Permanent

About ESS (CE) Ltd

Welcome to Earthwork Support Specialist (CE) Ltd — Specialists in Geotechnical Retaining Systems & Piling Solutions.

We provide expert solutions in the design, supply, and installation of geotechnical retaining walls and temporary works systems for the UK construction industry. With decades of combined experience, we are trusted by national housebuilders, civil engineering contractors, infrastructure clients, and commercial developers to deliver safe, practical, and cost-effective ground support systems — even in the most technically challenging environments.

Project Overview

This Holt Street project for MCI required the installation of a permanent retaining solution using an open bore CFA rig within the KPW system, designed to provide long-term stability for the site’s structural requirements.

The works involved:

• Permanent KPW retaining wall installation.

• Open bore CFA piling to achieve required depths and load capacities.

• Close coordination with site operations to maintain programme and safety targets.

Challenges

• Restricted site access and working space.

• Precision depth and alignment tolerances for pile installation.

• Noise and vibration management in a developed area.

Our Solution

ESS (CE) Ltd’s in-house engineering and site team delivered a fully managed piling solution:

• Detailed design of a permanent KPW retaining wall system.

• Deployment of an open bore CFA rig for accurate, low-vibration installation.

• Sequenced works to maximise efficiency within the limited site footprint.

• On-site quality assurance and compliance with engineering standards.

Outcome

• Permanent retaining wall installed to exact specification.

• Project delivered on time and within agreed budget.

• Minimal disruption to neighbouring properties and infrastructure.

Core Services Delivered

This project showcased our expertise in:

• Permanent Retaining Wall Solutions (KPW System)

• Open Bore CFA Piling

• Restricted Access Piling Solutions

• Geotechnical Design & Installation