IN Brief:
- National Grid has agreed to acquire approximately 29.5 hectares at Dorman Point on Teesworks.
- The 400kV transmission substation remains an outline planning proposal under consideration by Redcar and Cleveland.
- Land preparation, grid connection, and any neighbouring data centre and storage development have separate delivery requirements.
National Grid Electricity Transmission has agreed to acquire approximately 29.5 hectares at Dorman Point on the Teesworks industrial estate for a proposed 400kV electricity substation. The land agreement moves the Tees Dock project forward, while the associated planning application and construction programme remain separate steps. The site lies east of Middlesbrough on the south bank of the River Tees, within a former industrial area being prepared for new investment.
The scheme would add 400kV transmission infrastructure capable of serving large electrical loads at Teesworks. The development material identifies a contracted connection requirement exceeding one gigawatt of import and export capacity, with associated proposals for a private-wire network, a data centre and battery storage. The contracted figure concerns the electricity connection being developed; capacity for a wider Teesworks build-out remains subject to the individual projects’ grid, planning and investment decisions. The signed agreement gives National Grid a proposed site for the substation, but does not set an energisation date.
National Grid has already begun the statutory planning process. An outline application submitted to Redcar and Cleveland Borough Council in September covers the 400kV transmission substation, a temporary connection arrangement, enabling works, a construction compound, internal access, parking, drainage, landscaping and ancillary development. All matters are reserved at this stage, and the application is recorded as valid rather than approved. The public consultation period is scheduled to close on 11 November, with the council’s listed determination target falling in December.
The site also underwent an environmental impact assessment screening process earlier in the year. Redcar and Cleveland recorded a decision on 8 September that an environmental impact assessment was not required for the submitted proposal. Screening determines whether that assessment procedure is necessary; it does not replace planning permission, subsequent design approvals, or the technical requirements attached to the electricity installation. The outline application therefore remains an important gateway before groundworks can be treated as an authorised construction programme.
Construction of a 400kV substation involves more than preparing a building plot. The incoming transmission connection, switchgear, control and protection systems, drainage and access arrangements must fit within a coordinated site design. National Grid has identified the existing Lackenby–Norton overhead line as the network connection route in its project development material. Integrating that connection will require the electrical design and the civil engineering works to be sequenced together, particularly where temporary arrangements are needed before permanent equipment is commissioned.
The proposed site is part of the former industrial land at Dorman Point, where the condition of the ground will influence the design and sequence of construction. Ground investigations, remediation where needed, and preparation of access and working areas must precede foundations and equipment installation. Teesworks chairman Chris Musgrave has identified remediation and land preparation as immediate priorities before handover. The site agreement establishes the acquisition route while allowing those ground and access requirements to be worked through as the project design develops.
Beyond the site boundary, the planned data centre and energy storage facilities would have their own construction programmes and equipment requirements. The data centre’s internal distribution and cooling systems would be designed around its electrical connection and operating load, while a storage installation would require its own power conversion, protection and control equipment. The private-wire connection must interface with these facilities and the transmission system, so the location and timing of each development will influence the others. Separate consent and investment processes will determine which facilities are built and when.
The proposed electricity capacity is substantial. Tees Valley mayor Ben Houchen has discussed the potential for up to 3.2GW across the wider location, while the transmission development material describes a contracted connection of more than one gigawatt for the identified scheme. The figures refer to different scopes and should not be combined. Grid connection works, on-site electrical distribution and any data centre construction would be carried forward through their own design and approval stages.
Balfour Beatty has been identified in reporting as a potential construction contractor, and Steel River Power has been linked to the wider Teesworks electricity arrangements. Neither account establishes a signed works contract for this particular substation. Once a contractor’s scope is fixed, the civil programme will need to coordinate ground preparation, heavy equipment delivery, foundations, installation, connection works and commissioning with National Grid’s electrical design. The delivery sequence will also depend on the arrangements for the existing transmission network.
Redcar and Cleveland Borough Council has listed the outline application for determination in December, following consultation scheduled to end on 11 November. The land purchase, ground preparation and detailed design remain parallel parts of the Tees Dock programme. A planning decision and subsequent project approvals will establish the basis for the construction timetable and the final arrangement of electrical equipment within the 29.5-hectare site.
