Source: https://tendernation.io/opportunities/01a13bea-1a43-73a7-b011-c1516289d3d5/underwater-pipeline-crossing-surveys-remedial-works awarded GB restricted procedure # ​​​Underwater Pipeline Crossing Surveys & Remedial Works​​ [Northern Gas Networks Limited](https://tendernation.io/buyers/northern-gas-networks-limited) Estimated value Not stated Published 15 Sept 2026 Deadline Rolling deadline ## About this tender Northern Gas Networks (NGN) requires the provision of specialist river crossing survey and assessment services across its gas distribution network to monitor the condition, integrity, and ongoing safety of pipeline assets located within river crossings and associated watercourses. The scope of services includes, but is not limited to: - Determination of pipeline cover depths and profiles within river crossings. - Identification and assessment of changes to riverbeds, banks, and watercourses that may affect pipeline integrity or stability. - Confirmation of pipeline locations through topographical and hydrographic survey techniques, supported by geomorphological assessments where required. - Surveying of riverbed and bank levels to identify erosion, scour, exposure, or other changes in condition. - Inspection and assessment of exposed pipeline sections. - Evaluation of the condition and construction of riverbeds, banks, and associated crossing infrastructure. - Close Interval Polarised Potential (CIPP) Surveys and other corrosion monitoring activities where specified by NGN. The appointed supplier shall provide comprehensive survey reports detailing the methodology employed, survey findings, identified risks, and recommendations for any remedial or risk mitigation measures. Where required, the contract may also include the provision of remedial works arising from survey findings to maintain the safety, integrity, and operational performance of the pipeline network. This procurement seeks to establish a contract for the delivery of these specialist services across NGN's geographical operating area, ensuring the continued monitoring, assessment, maintenance, and protection of pipeline river crossings. The contract will support NGN in maintaining compliance with applicable engineering, environmental, and safety requirements while ensuring the long-term resilience and integrity of its gas distribution infrastructure. Read full description Source Find a Tender (UK) · Notice ocds-h6vhtk-06fa27-2026-09-15T13:46:13+01:00 [View official notice](https://www.find-tender.service.gov.uk/Notice/ocds-h6vhtk-06fa27-2026-09-15T13:46:13+01:00) Never miss a tender like this again Get AI summaries, deadline alerts and a bid pipeline for tenders matched to your business. Free to start. [Track tenders free](https://tendernation.io/register) [Buyer profile Northern Gas Networks Limited: past awards and live tenders](https://tendernation.io/buyers/northern-gas-networks-limited) ## More tenders like this [Bannister Sports Centre Athletic Track Soft Market Testing Exercise · Harrow Council · 38 days left · 26 Nov 2026](https://tendernation.io/opportunities/01a1540d-d9e4-71cb-ad57-1603e9042fec/bannister-sports-centre-athletic-track-soft-market-testing-exercise) [Engineering works and construction works – Integrated Partnerships Framework · Northern Ireland Water · 30 days left · 18 Nov 2026](https://tendernation.io/opportunities/01a156a9-7b9a-73c9-b710-2a5021d3fa0d/united-kingdom-engineering-works-and-construction-works-integrated-partnersh) [Hdc-1714 wadkins pavilion refurbishment · Harborough District Council · 39 days left · 27 Nov 2026](https://tendernation.io/opportunities/01a155bf-f664-72f9-9823-a85d6cddbdc6/hdc-1714-wadkins-pavilion-refurbishment) [Design, supply, and Installation of Newbiggin Skatepark Extension · Newbiggin Town Council · 35 days left · 23 Nov 2026](https://tendernation.io/opportunities/01a15552-19a2-7348-a5cc-3f5ae51ef934/design-supply-and-installation-of-newbiggin-skatepark-extension) [Tender for the design, supply, delivery and installation of a modular UNIT and associated works at ARC healthy living, irvinestown. peaceplus funded upgrade works · Fermanagh and Omagh District Council · 14 days left · 2 Nov 2026](https://tendernation.io/opportunities/01a15552-1b74-73ec-a6f6-a1af37959997/tender-for-the-design-supply-delivery-and-installation-of-a-modular-unit-and-a) [Architectural, design and building consultancy services - Dalby Visitor Centre · Forestry Commission · 25 days left · 13 Nov 2026](https://tendernation.io/opportunities/01a15552-1b8a-7041-80fb-e4943876fc38/architectural-design-and-building-consultancy-services-dalby-visitor-centre)