Freedom was briefed to complete a detailed feasibility study for the concept design and routing of multiple new 5km 132kV cable circuits. In addition, an extensive re-design of Little Barford substation and the design for a new 132kV substation at an existing National Grid site were also required.
Freedom used LiDAR aerial survey technology to undertake a large 5 x 5km survey across the existing substations and cable route. From the LiDAR survey data, multiple route corridors were produced enabling the wayleave and consents team to finalise a best option route. Full 3D CAD models of the substations, plus stage-by-stage demolition and construction plans and directional drilling designs for a number of road crossings, were produced. Overhead line terminations were also designed to ensure the correct terminal tower extensions were specified to meet statutory ground clearance.
The client received a final cable route and positioning of terminal towers, which had minimal impact on the local environment. The design was completed with outline planning drawings of the new 132kV substation at Eaton Socon and detailed drawings at Little Barford, supporting the demolition and new circuit arrangements.