--- title: "Sewer Mapping" ocid: "ocds-h6vhtk-0597b6" canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-0597b6" markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-0597b6.md" json_url: "https://d3tenders.com/contract/ocds-h6vhtk-0597b6.json" source: "Find A Tender Service" current_stage: "Award" buyer: "THAMES WATER UTILITIES LIMITED" published: "2026-03-06" --- # Sewer Mapping Buyer: THAMES WATER UTILITIES LIMITED Current stage: Award OCID: ocds-h6vhtk-0597b6 [View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-h6vhtk-0597b6) [Download OCDS JSON](https://d3tenders.com/contract/ocds-h6vhtk-0597b6.json) ## Summary Thames Water Utilities Limited, based in Reading, has concluded the procurement process for enhancing its sewer network mapping across Greater London and the Thames Valley. The contract titled 'Sewer Mapping' aims to address blockages, floods, and pollution by mapping unmapped sewer networks to support the Pollution Incident Reduction Plan (PIRP) during AMP8. The competitive flexible procedure has seen awards to suppliers including 1Spatial and APEM Limited, focusing on various aspects, such as aerial mapping, asset detection, and sewer inferencing. The procurement phase transitioned from 'tender' to 'award', with the contract scheduled to commence on 19 March 2026, lasting until 28 February 2030, with potential extensions up to 2032. This contract presents substantial opportunities for businesses specialising in sewer mapping, asset detection, and georeferenced imagery, offering a structured framework agreement with provisions for further purchases. SMEs with technical experience in these areas, particularly those capable of delivering high accuracy in detection and mapping, may find significant growth potential by engaging in this contract. Companies that successfully demonstrate innovation, sustainability, and efficient risk management within the competitive procedure could secure a vital role in supporting a large-scale infrastructure project designed to benefit local communities and the environment. The procurement strategy ensures resilience by spreading risk among successful bidders appointed for specific lots, promoting a collaborative approach to addressing environmental challenges. ## Notice Thames Water is seeking to develop the mapped sewer network throughout Greater London and the Thames Valley area, in order to reduce blockages, internal and external floods and pollution. Unmapped sewers lead to a delay in Thames Water locating and attending blockages, floods and pollution, affecting local communities and the environment. The objective of FA2241 is to map any unmapped sewer networks at scale, speed and accuracy, directly supporting the Pollution Incident Reduction Plan (PIRP) that Thames Water is working towards during AMP8. Lot 1 - Aerial Mapping: Capture of 2,484 km2 across 71 Sewer Drainage Area Catchments (SDACs) using manned aircraft, delivering georeferenced 2D, oblique 2D, and 3D imagery. Lot 2 - Asset Detection: Detection of manholes, gullies, rainwater downpipes, soil stacks, misconnections, and outfalls with confidence grading. Lot 3 - Sewer Inferencing: Semi-/automated inferencing of unmapped sewers, laterals, drains, rising mains, and selected SPSs, achieving ?80% accuracy. ### Lot Information 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. Options: The full scope of the services to be provided and any options that may be considered throughout the term of the agreement, is set out in the Specification issued within the Invitation to Negotiate (ITN) document. Renewal: Thames Water envisages that the contract will be awarded for an initial term of 4 years with options to extend by 2 years, up to a maximum overall term of 6 years. Additional purchases of aerial survey services may be considered during the contract term, subject to ITN specification. Asset Detection Detection of manholes, rainwater downpipes, surface water outfalls, gullies, soil stacks, and misconnections, with confidence grading. PS5m Product Liability will also be required, Options: The full scope of the services to be provided and any options that may be considered throughout the term of the agreement, is set out in the Specification issued within the Invitation to Negotiate (ITN) document. Renewal: Thames Water envisages that the contract will be awarded for an initial term of 4 years with options to extend by 2 years, up to a maximum overall term of 6 years. Additional purchases of aerial survey services may be considered during the contract term, subject to ITN specification. Sewer Inferencing Lot 3 - Sewer Inferencing: Semi-/automated inferencing of unmapped sewers, laterals, drains, rising mains, and selected SPSs, achieving >=80% accuracy. PS5m Product Liability will also be required, Options: The full scope of the services to be provided and any options that may be considered throughout the term of the agreement, is set out in the Specification issued within the Invitation to Negotiate (ITN) document. Renewal: Thames Water envisages that the contract will be awarded for an initial term of 4 years with options to extend by 2 years, up to a maximum overall term of 6 years. Additional purchases of aerial survey services may be considered during the contract term, subject to ITN specification. ## Key Details | Field | Value | | --- | --- | | Publication source | Find A Tender Service | | Latest notice | https://www.find-tender.service.gov.uk/Notice/020240-2026 | | Notice type | UK6 - Contract Award Notice | | Procurement type | Framework | | Procurement category | Services | | Procurement method | Selective | | Procurement method details | Competitive flexible procedure | | Tender suitability | SME | | Awardee scale | Large, SME | | All stages | Tender, Award | ## Dates | Field | Value | | --- | --- | | Publication date | 6 Mar 2026 | | Submission deadline | Not specified | | Future notice date | Not specified | | Award date | 6 Mar 2026 | | Contract period | 19 Mar 2026 - 28 Feb 2030 | | Recurrence | Not specified | ## Values | Field | Value | | --- | --- | | Tender value | £5,996,000 | | Lots value | £5,996,000 | | Awards value | £5,996,000 | | Contracts value | Not specified | ## Status | Field | Value | | --- | --- | | Tender status | Complete | | Lots status | Complete | | Awards status | Pending | | Contracts status | Not specified | ## Buyer | Field | Value | | --- | --- | | Main buyer | THAMES WATER UTILITIES LIMITED | | Locality | READING | | Post town | Reading | | Postcode | RG1 8DB | | Country | England | | ITL 1 | TLJ South East (England) | | ITL 2 | TLJ1 Berkshire, Buckinghamshire and Oxfordshire | | ITL 3 | TLJ16 Berkshire West | | Local authority | Reading | | Electoral ward | Thames | | Westminster constituency | Reading Central | | Delivery location | Not specified | ## Supplier | Field | Value | | --- | --- | | Number of suppliers | 2 | | Supplier names | 1SPATIAL GROUP; APEM | ## CPV Codes ### Divisions - 90 - Sewage, refuse, cleaning and environmental services ### Codes - 90491000 - Sewer survey services ## Release History - 6 Mar 2026 at 10:21 - Award - UK6 - Contract Award Notice - https://www.find-tender.service.gov.uk/Notice/020240-2026 - 10 Sep 2025 at 14:10 - Tender - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/055461-2025 ## Documents - https://www.find-tender.service.gov.uk/Notice/020240-2026 6th March 2026 - Contract award notice on Find a Tender - https://www.find-tender.service.gov.uk/Notice/055461-2025 10th September 2025 - Tender notice on Find a Tender ## Notice URLs - https://1spatial.com/ - https://forms.office.com/e/y3Wn3Lya8i - https://www.apemltd.com/ - https://www.legislation.gov.uk/ukpga/2023/54/contents ## Provenance This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-h6vhtk-0597b6. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-0597b6.json.