Source: https://tendernation.io/opportunities/01a13bac-499d-72b9-a14f-b94a85854bb8/scour-and-accretion-monitoring-services-for-the-thames-tideway-tunnel

closed GB restricted procedure

# Scour and Accretion Monitoring Services for the Thames Tideway Tunnel

[Bazalgette Tunnel Limited t/a Tideway](https://tendernation.io/buyers/bazalgette-tunnel-limited-ta-tideway)

Estimated value

£2,000,000

Published

8 Jul 2024

Deadline

Closed

7 Aug 2024

## About this tender

The Thames Tideway Tunnel (TTT) is a major infrastructure project, urgently needed to protect the tidal River Thames from increasing pollution. London’s sewerage system is no longer fit for purpose and spills tens of millions of tonnes of untreated sewage mixed with rainwater (combined sewage) into the tidal reaches of the River Thames every year. Bazalgette Tunnel Limited (BTL), is the licensed provider set up to finance, build, maintain and operate the Thames Tideway Tunnel. From Licence Award BTL trades and is known to the public as 'Tideway'.

Following completion of the main tunnelling works, it is necessary to undertake scour and accretion monitoring services (bathymetric surveys) of the foreshore to monitor for unexpected impact on scour and accretion within the River Thames. The purpose of the services is to establish the foreshore profile and natural variations of the foreshore following construction works in the foreshore when operation of the TTT commences. The surveys are to be of designated areas and repeated to determine variations between surveys. The TTT works in the foreshore have the potential to affect the river regime, causing variations in the riverbed levels greater that natural variations and may affect the natural habitat. Scour of the riverbed can be detrimental to the stability of third-party infrastructure such as river walls, jetties and bridge piers, whereas accretion of the riverbed may impact navigation and could affect drainage outfalls.

It is anticipated that a supplier will be procured to deliver the services (across multiple project TTT sites / locations) pursuant to the award of a single contract. The contract is expected to commence in March 2025 allowing for a period of supplier mobilisation, with Services due to commence in June 2025 up to a period of six years. Please note this period is subject to change. The duration of the requirement will ultimately be determined by ongoing analysis of the River Thames and associated scour and accretion levels.

Interested parties must register on Tideway's e-sourcing portal and will be able to download the Pre-Qualification Pack ('PQP') including the form of response to be completed and returned to submit a compliant response. The registration process is set out in section VI.3) of this Contract Notice. The PQP contains further detail regarding Tideway, the scope of services and further detail on the Contract and the timeline and phases of the procurement. Whilst it is intended that the procurement will be run in accordance with the timeline and process described in the PQP, this contract notice and the Procurement Documents, Tideway reserves the right to amend or cancel any or all of the procurement at any time and/or amend the timescales.

Read full description

## CPV classification

Bathymetric surveys services Survey vessels Surveying, hydrographic, oceanographic and hydrological instruments and appliances Surveying instruments Hydrographic surveying services Surveying services Survey analysis services

Source

Find a Tender (UK) · Notice ocds-h6vhtk-047b7a-2024-07-08T11:09:52+01:00

[View official notice](https://www.find-tender.service.gov.uk/Notice/ocds-h6vhtk-047b7a-2024-07-08T11:09:52+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 Bazalgette Tunnel Limited t/a Tideway: past awards and live tenders](https://tendernation.io/buyers/bazalgette-tunnel-limited-ta-tideway) [Sector More Architecture, engineering & surveying tenders](https://tendernation.io/sectors/architecture-engineering-surveying)

## More tenders like this

[EBCT 475 - Renewable Energy Study Commission · Erewash Borough Council · 37 days left · 26 Nov 2026](https://tendernation.io/opportunities/01a15934-c154-70f6-ad84-4990922fa7b3/ebct-475-renewable-energy-study-commission) [IT0043 Flooding Term Commission 2027-2031 · Falkirk Council · 42 days left · 30 Nov 2026](https://tendernation.io/opportunities/01a1592e-ed1a-71f7-bc79-c7cca1bb8ee2/it0043-flooding-term-commission-2027-2031) [Construction project management services – Dietrich-Bonhoeffer-Gymnasium-Oberasbach – Neubau Mehrfachsporthalle · Landkreis Fürth · 28 days left · 16 Nov 2026](https://tendernation.io/opportunities/01a156a9-ce57-722f-92f9-e818a29a32bc/germany-construction-project-management-services-dietrich-bonhoeffer-gymnasi) [Engineering studies – réalisation D'UN schéma directeur intercommunal d'assainissement · Charlieu-Belmont Communauté · 48 days left · 7 Dec 2026](https://tendernation.io/opportunities/01a156a9-9427-728b-9f2e-57d5081fa516/france-engineering-studies-realisation-dun-schema-directeur-intercommunal-d) [Architectural, construction, engineering and inspection services – Matthias-Claudius-Schule Tragwerk und Bauphysik · Stadt Kaarst - Der Bürgermeister · 36 days left · 24 Nov 2026](https://tendernation.io/opportunities/01a156a9-cc1c-708b-90a7-a22d2885c295/germany-architectural-construction-engineering-and-inspection-services-mat) [Engineering services – Mission de Maîtrise d'oeuvre complète pour la construction de 111 logements VAULX-EN-VELIN (69120) - ZAC MAS DU TAUREAU Îlots J1/J2 · Alliade Habitat · 28 days left · 16 Nov 2026](https://tendernation.io/opportunities/01a156a9-932d-7197-8cc1-ad619ede83e0/france-engineering-services-mission-de-maitrise-doeuvre-complete-pour-la-co)