Pollution Mitigation of Hobson's Brook and Coldham's Common

Notice Information

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Notice Title

Notice Description

Cambridge City Council invites expressions of interest from suitably qualified organisations to provide pollution mitigation evidence integration, modelling and design support for the Hobson's Brook and Coldham's Common components of the Cambridge City chalk stream restoration programme. At this stage, the Council is just undertaking a preliminary market engagement exercise. Interested parties are not required to submit detailed proposals; instead, suppliers are simply invited to register their interest via this portal. You may, however, choose to submit a brief summary of relevant previous experience or an outline of your suitability as a supplier for this project. The request for quote (RfQ) will follow shortly after and further details will be provided. The commission will support the design of nature-based urban pollution mitigation systems, including forebays, wetland cells, swales, polishing stages and associated hydraulic and pollutant removal modelling. Project Context and Evidence Base The Greater Cambridge Chalk Stream Project has developed a substantial evidence base for urban chalk stream restoration and pollution mitigation. The Hobson's Brook Urban Chalk Stream Resilience Project identifies chronic urban runoff and diffuse pollution entering Hobson's Brook, including runoff conveyed by the North Ditch from the Cambridge Biomedical Campus. The project documentation identifies nutrients, sediments, hydrocarbons and salts as pollutants of concern and proposes treatment through a sequence of wetlands, infiltration swales and polishing ponds. For Coldham's Common, the East Cambridge Main Drain and Coldham's Brook evidence base includes water quality snapshot sampling, mapping of the East Cambridge Main Drain and Coldham's Brook, and emerging nature-based solution proposals for wetlands and wider habitat restoration. Evidence includes field and laboratory measurements for dissolved oxygen, temperature, pH, electrical conductivity, turbidity, phosphate, ammonia, nitrate and faecal coliforms. The wider project evidence base includes weekly water quality monitoring, laboratory nutrient analysis, high-resolution continuous data loggers, targeted snapshot surveys for heavy metals, hydrocarbons and other urban pollutant signatures, WHPT macroinvertebrate results, MTR macrophyte surveys, sediment research, geomorphological interpretation and restoration delivery records. Purpose of the Commission The purpose of this commission is to provide a specialist lead role for pollution mitigation evidence and design for Hobson's Brook and Coldham's Common. The commission must convert the available evidence into practical, defensible and measurable nature-based pollution mitigation designs capable of informing construction planning, consents, delivery sequencing and future performance validation. The required outputs must support Cambridge City Council in moving from evidence and concept to delivery-ready technical design. The appointed supplier must provide a clear evidence trail from monitoring data and pollutant load analysis through to treatment train sizing, design assumptions, hydraulic performance, pollutant removal expectations, risks, uncertainties and monitoring validation requirements. Strategic Role * Provide specialist pollution mitigation leadership for Hobson's Brook and Coldham's Common. * Integrate water quality, urban runoff, sediment, biological and habitat evidence into the design process. * Develop pollutant load calculations and event-based design assumptions. * Design or support the design of nature-based treatment systems for nutrients, fine sediment, metals, hydrocarbons and mixed urban runoff pressures. * Support treatment train sizing, hydraulic performance and pollutant removal modelling. * Provide technical input into consents, approvals, construction-ready plans and design validation. * Work collaboratively with Cambridge City Council, ARU, Keele, contractors and other project partners. * Support a monitoring and validation framework so that performance can be measured after delivery.

Planning Information

Cambridge City Council invites expressions of interest from suitably qualified organisations to provide pollution mitigation evidence integration, modelling and design support for the Hobson's Brook and Coldham's Common components of the Cambridge City chalk stream restoration programme. At this stage, the Council is just undertaking a preliminary market engagement exercise. Interested parties are not required to submit detailed proposals; instead, suppliers are simply invited to register their interest via this portal: https://procontract.due-north.com/Home/About. You may, however, choose to submit a brief summary of relevant previous experience or an outline of your suitability as a supplier for this project. The request for quote (RfQ) will follow shortly after and further details will be provided. The commission will support the design of nature-based urban pollution mitigation systems, including forebays, wetland cells, swales, polishing stages and associated hydraulic and pollutant removal modelling. Project Context and Evidence Base The Greater Cambridge Chalk Stream Project has developed a substantial evidence base for urban chalk stream restoration and pollution mitigation. The Hobson's Brook Urban Chalk Stream Resilience Project identifies chronic urban runoff and diffuse pollution entering Hobson's Brook, including runoff conveyed by the North Ditch from the Cambridge Biomedical Campus. The project documentation identifies nutrients, sediments, hydrocarbons and salts as pollutants of concern and proposes treatment through a sequence of wetlands, infiltration swales and polishing ponds. For Coldham's Common, the East Cambridge Main Drain and Coldham's Brook evidence base includes water quality snapshot sampling, mapping of the East Cambridge Main Drain and Coldham's Brook, and emerging nature-based solution proposals for wetlands and wider habitat restoration. Evidence includes field and laboratory measurements for dissolved oxygen, temperature, pH, electrical conductivity, turbidity, phosphate, ammonia, nitrate and faecal coliforms. The wider project evidence base includes weekly water quality monitoring, laboratory nutrient analysis, high-resolution continuous data loggers, targeted snapshot surveys for heavy metals, hydrocarbons and other urban pollutant signatures, WHPT macroinvertebrate results, MTR macrophyte surveys, sediment research, geomorphological interpretation and restoration delivery records. Purpose of the Commission The purpose of this commission is to provide a specialist lead role for pollution mitigation evidence and design for Hobson's Brook and Coldham's Common. The commission must convert the available evidence into practical, defensible and measurable nature-based pollution mitigation designs capable of informing construction planning, consents, delivery sequencing and future performance validation. The required outputs must support Cambridge City Council in moving from evidence and concept to delivery-ready technical design. The appointed supplier must provide a clear evidence trail from monitoring data and pollutant load analysis through to treatment train sizing, design assumptions, hydraulic performance, pollutant removal expectations, risks, uncertainties and monitoring validation requirements. Strategic Role • Provide specialist pollution mitigation leadership for Hobson's Brook and Coldham's Common. • Integrate water quality, urban runoff, sediment, biological and habitat evidence into the design process. • Develop pollutant load calculations and event-based design assumptions. • Design or support the design of nature-based treatment systems for nutrients, fine sediment, metals, hydrocarbons and mixed urban runoff pressures. • Support treatment train sizing, hydraulic performance and pollutant removal modelling. • Provide technical input into consents, approvals, construction-ready plans and design validation. • Work collaboratively with Cambridge City Council, ARU, Keele, contractors and other project partners. • Support a monitoring and validation framework so that performance can be measured after delivery.

Notice Details

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Publication & Lifecycle

Open Contracting ID: ocds-h6vhtk-06b89c
Publication Source: Find A Tender Service
Latest Notice: https://www.find-tender.service.gov.uk/Notice/057833-2026
Current Stage: Planning
All Stages: Planning

Procurement Classification

Notice Type: UK2 - Preliminary Market Engagement Notice
Procurement Type: Standard
Procurement Category: Services
Procurement Method: Not Specified
Procurement Method Details: Not specified
Tender Suitability: SME, VCSE
Awardee Scale: Not specified

Common Procurement Vocabulary (CPV)

CPV Divisions: 90 - Sewage, refuse, cleaning and environmental services
CPV Codes: 90710000 - Environmental management

Notice Value(s)

Tender Value: £100,000 £100K-£500K
Lots Value: Not specified
Awards Value: Not specified
Contracts Value: Not specified

Notice Dates

Publication Date: 19 Jun 20265 days ago
Submission Deadline: Not specified
Future Notice Date: 6 Jul 20262 weeks to go
Award Date: Not specified
Contract Period: 2 Aug 2026 - 2 Apr 2029 2-3 years
Recurrence: Not specified

Notice Status

Tender Status: Planning
Lots Status: Planning
Awards Status: Not Specified
Contracts Status: Not Specified

Buyer & Supplier

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Contracting Authority (Buyer)

Main Buyer: CAMBRIDGE CITY COUNCIL
Contact Name: Available with D3 Tenders Premium →
Contact Email: Available with D3 Tenders Premium →
Contact Phone: Available with D3 Tenders Premium →

Buyer Location

Locality: CAMBRIDGE
Postcode: CB2 1BY
Post Town: Cambridge
Country: England
Major Region (ITL 1): TLH East (England)
Basic Region (ITL 2): TLH4 Cambridgeshire and Peterborough
Small Region (ITL 3): TLH42 Cambridgeshire CC
Delivery Location: TLH12 Cambridgeshire CC
Local Authority: Cambridge
Electoral Ward: Market
Westminster Constituency: Cambridge

Further Information

Notice Documents

https://www.find-tender.service.gov.uk/Notice/057833-2026
19th June 2026 - Preliminary market engagement notice on Find a Tender

Notice URLs

Open Contracting Data Standard (OCDS)

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The Open Contracting Data Standard (OCDS) is a framework designed to increase transparency and access to public procurement data in the public sector. It is widely used by governments and organisations worldwide to report on procurement processes and contracts.

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