Case Studies

As part of the WRS Framework, OCU are delivering new service reservoirs to support Affinity Water’s Strategic Supply 2040 Programme.

OCU was appointed to deliver specialist network maintenance services under Lot 8 of United Utilities’ framework agreement, covering noncore clean water infrastructure across the North West. The contract includes complex repairs to critical assets such as aqueducts and pipe bridges, often located in remote or restricted-access areas.

OCU has been awarded multiple diversion packages at Old Oak Common train station, covering water, gas, regulated power and telecoms. These works are key to enabling construction of the station and wider infrastructure. Our teams have successfully managed and coordinated multiple workstreams navigating deep excavations and restricted working zones in a highly congested site.

OCU is delivering essential utility diversions as part of one of the UK’s most complex infrastructure undertakings. Our Water and HDD teams have led the delivery of strategic diversions across water, gas, power and telecoms, applying our NIRS, GIRS and WIRS accreditations to ensure works are completed to the highest industry standards.

OCU has been a trusted partner of Welsh Water for over 15 years, supporting the delivery of their Asset Management Plans (AMPs), and contributing towards their 2050 vision: to become a world class, resilient and sustainable water service.

OCU has been a strategic delivery partner on Dŵr Cymru Welsh Water’s Pressurised Pipe Framework since
2012, supporting capital delivery across the clean water pressurised pipe network in Wales.

Upgraded the electrical infrastructure at Mill Hill, Longforgan with new 11kV wood poles, overhead switchgear, and a third conductor to supply a 200kVA transformer, enabling a three-phase connection for new solar and ground source heat pump installations.

Upgraded the electrical infrastructure at Mill Drowndubbs with new 11kV wood poles, overhead switchgear, and an additional conductor to provide a three-phase supply and transformer upgrade for an SSEN customer.

Under an NEC3 subcontract, we built a 2000m² GIS Substation, two transformer buildings, a 210m x 150m platform, reinforced structures, improved access, and installed underground cabling with GRP covers.

NEC4 Option A contract involved the construction of a 653m² portal frame for a Synchronous Condenser, with 8500m² platform, 1km access road, fencing and earthing - providing robust, secure foundations for long-term operation.

The project covered full BoP works for a 50MW battery storage site in Fife, including access roads, drainage, switchrooms, 33kV cabling, MV transformers, BESS units, and 2km of DNO cabling over sensitive terrain.

OCU was contracted to design and install twin 1,025 metre lengths of 500mm Diameter SDR-9 PE100 Foul Main under Cork Harbour using Horizontal Directional Drilling (HDD).

OCU was awarded the Dee Crossing contract, located in Connah’s Quay. Our teams designed and installed two 860m-long barrier pipelines under the River Dee using Horizontal Directional Drilling (HDD). 

This 20MW Battery Energy Storage System (BESS) project was constructed at Ray Wind Farm approximately 5km south of the village of Otterburn in Northumberland.

Our teams delivered the Civil and Electrical works associated with a new 50MW Battery Energy Storage System (BESS).

Our teams provided the Civil and Electrical works associated with a new 49MW Battery Energy Storage System (BESS).

ABP identified a number of Transformer Assets that are progressing in age and have a considerable number of losses when they are transforming the High Voltage Network down to the localised Low Voltage requirement.

OCU were awarded the contract by Scottish and Southern Energy Renewables Ltd for the Design, Construction, Commissioning and Handover of the 132kV/33kV Electrical Infrastructure and Substation Plant and Control Systems.

Capenhurst is a 100MW Battery Energy Storage System (BESS) connected to the National Grid (NGET) at 275kV.

OCU is contracted by Vodafone to deliver fibre and civils call out services on a 24/7/365 basis throughout England and Wales.

OCU were brought in to take over rectification of the design, finalising construction and completing the energisation of site following the former supplier's liquidation.

OCU holds the repair and maintenance agreement with NEOS throughout England. We provide all fibre associated works including, Highways, PIA, confined spaces, roof top, and overhead cables.

OCU took on the emergency job of the installation of several modular storm tanks at 3 different live site locations to meet key WINEP dates for SWW compliance to the EA for 2024 in a 12-week window as PC and PD for SWW at their request in Devon.

OCU is the road network maintenance provider for Lumen. Our teams are responsible for repairs across COLT Neo’s (Lumen’s 500km fibre network) both proactively and reactively.