Derby Triangle St Mowden


Derby Triangle St Mowden


Wyvern Way, Derby and into City Centre


Electricity, Water & Gas


Derby Triangle is a large 50-acre industrial and logistics warehouse park in the heart of Derby, developed by St Modwen in partnership with Network Rail. 

HVSS were commissioned to supply 7.2MVA of electricity, MP gas and water to 9 industrial units, split over three phases with tight deadlines in an area that had restricted working. 


Collaborating with various stakeholders including the council, Network Rail and Environment Agency. HVSS explored viable routes, overcoming obstacles such as TPOs (Tree Preservation Orders), flood defences, and river crossings. Once the evaluation was complete, an application was formally submitted to the incumbent electricity provider for the placement of the 11kV High Voltage (HV) PoC onto the operator’s network. Our Design Engineer crafted a detailed CAD drawing, based on the outline offer letter. ‘Approved for Construction’ design drawings adhering to the UK G81 Specification and within the National Grid and iDNO codes of conduct were delivered. 

HVSS contacted the local government seeking structural plans for the bridge that was located between the two proposed cable routes. It became clear that one of the routes had a significant risk and would be impractical. The bridge’s structural designs illustrated that it was not deep enough to accommodate both HV wires feeding the site and would breach the network operator’s G81 specification. After careful consideration, the most economically viable and safest option was chosen which also had the least amount of impact on the general public.


Extensive design work was carried out and a route was approved, which included a 160m directional drill under the river Derwent and a hand dig solution under an existing railway line bridge. 

The Tendering, Design and Construction teams worked closely with the client and third parties to keep them informed throughout the process, discussing and driving agreeable solutions that considered engineering restraints and the clients’ timescales for delivery. 

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