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In deliveryUnited KingdomServicesFramework agreement£5,996,000Add to pipeline

Sewer Mapping

Awarded to 1SPATIAL GROUP LIMITED, APEM LIMITED

THAMES WATER UTILITIES LIMITED(buyer)

Published
Published 10 September 2025

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Overview

Thames Water Utilities Limited awarded a contract on 6 March 2026 to 1SPATIAL GROUP LIMITED and APEM LIMITED for £11.99 million to map unmapped sewer networks across Greater London and the Thames Valley. The scope comprises three lots: aerial mapping of 2,484 km² using manned aircraft to capture 2D, oblique 2D, and 3D imagery; asset detection of manholes, gullies, downpipes, and misconnections; and semi-automated inferencing of unmapped sewers and drainage infrastructure to achieve at least 80% accuracy, directly supporting Thames Water's Pollution Incident Reduction Plan.

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Lots (3)

  • Aerial Mapping

    Capture of 2D, oblique 2D, and 3D georeferenced imagery for 2,484 km² across 71 Sewer Drainage Area Catchments (SDACs), phased delivery by 2028, conducted by manned aircraft.

    £5,996,000Won by APEM LIMITED
  • Asset Detection

    Detection of manholes, rainwater downpipes, surface water outfalls, gullies, soil stacks, and misconnections, with confidence grading. £5m Product Liability will also be required,

    £5,996,000Won by APEM LIMITED
  • Sewer Inferencing

    Lot 3 - Sewer Inferencing: Semi-/automated inferencing of unmapped sewers, laterals, drains, rising mains, and selected SPSs, achieving ≥80% accuracy. £5m Product Liability will also be required,

    £5,996,000Won by 1SPATIAL GROUP LIMITED

Key details

Country
United Kingdom
Status
In delivery
Category
Services
Estimated value
£5,996,000
Procedure
Selective
Contract type
Framework agreement
SME suitable
Yes
Published
10 September 2025
Classification (CPV)
Sewer survey services

Award outcome

Awarded value
£11,992,000
Award date
6 March 2026
Contract period
2 March 2026 → 28 February 2030
Winners
  • 1SPATIAL GROUP LIMITED
  • APEM LIMITED

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Notice history

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  1. Contract

    6 March 2026

  2. Contract Notice

    10 September 2025

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