Tender: GPR and Underground Utility Mapping for Lower Thames Crossing (Roads North of the Thames) – PAS128 Surveys

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Balfour Beatty is seeking a subcontractor to deliver Ground Penetrating Radar (GPR) surveys and underground utility mapping as part of the Lower Thames Crossing Roads North of the Thames infrastructure programme. The package requires PAS128-compliant underground utility detection surveys (Type B - M1 and M2), terrestrial topographic data capture, digital mapping and reporting in 2D and 3D AutoCAD, accurate location and depth recording to Quality Levels B1–B4, use of intelligent radar scanning and electromagnetic locator techniques, full X, Y, Z annotation and feature coding, and delivery of layered AutoCAD files with comprehensive survey reports. Subcontractors must demonstrate proven PAS128 experience, competence in advanced survey equipment and software, robust health, safety, environmental and quality management systems, and appropriate certifications (for example ISO 9001, ISO 14001, ISO 45001) with familiarity with the Specification for Highway Works; interested parties should respond by 03.11.2025 to receive further details.