--- title: "Lot C: River Colne Constructed Wetland Outline Design and Feasibility" ocid: "ocds-h6vhtk-0589a1" canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-0589a1" markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-0589a1.md" json_url: "https://d3tenders.com/contract/ocds-h6vhtk-0589a1.json" source: "Find A Tender Service" current_stage: "Tender" buyer: "LOT C: RIVER COLNE CONSTRUCTED WETLAND OUTLINE DESIGN AND FEASIBILITY" published: "2025-08-18" --- # Lot C: River Colne Constructed Wetland Outline Design and Feasibility Buyer: LOT C: RIVER COLNE CONSTRUCTED WETLAND OUTLINE DESIGN AND FEASIBILITY Current stage: Tender OCID: ocds-h6vhtk-0589a1 [View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-h6vhtk-0589a1) [Download OCDS JSON](https://d3tenders.com/contract/ocds-h6vhtk-0589a1.json) ## Summary The Watford Town Hall, acting as a sub-central government public authority, is inviting tenders for the "Lot C: River Colne Constructed Wetland Outline Design and Feasibility" project. This procurement, currently in the tender stage, is classified under the industry category of "River regulation and flood control works." The project entails comprehensive surveys and appraisals to design and implement an improved wetland facility. Located in Watford, UK, interested parties should note the procurement is open with electronic submissions permitted. The deadline for tender submissions is 12th September 2025, with the enquiry period closing on 5th September 2025. The project is valued at £25,000, with a contract period starting from 6th October 2025 and concluding on 20th March 2026. This tender presents significant growth opportunities for businesses specialising in civil engineering, environmental consultancy, and water management. Ideal candidates would possess expertise in site investigation, environmental impact assessments, and design consultation, particularly concerning riverbank protection and feasibility analysis. SMEs with a focus on sustainable development and management of wetland systems will find the open competition especially promising, where the buyer seeks a balance between cost efficiency and method excellence, emphasised by the award criteria that weigh quality of design and management experience heavily. This is a pivotal opportunity for innovators poised to contribute meaningfully to environmental sustainability in public infrastructure projects. ## Notice This tender will encompass the following activities. 1. Topographical, hydrological, sediment and water quality surveys to understand the through-flow regime, likely input quality and quantities for a range of surface water run-off conditions. 2. Strategic investigation of on-site ground contamination and suitability of existing sediments for re-use or to allow identification of requirements for disposal (including Water Regulations (WR), Waste Management (WM3), and Waste Acceptance Criteria (WAC) as needed). 3. Biodiversity Net Gain assessment and Preliminary Ecological Appraisal highlighting lessons learned from the historic wetland design where evidence exists. 4. A multi-criteria options appraisal matrix to record and assess relative costs and benefits of a variety of sub-options and approaches to determine an evidenced preferred option. 5. Lead a stakeholder workshop and consultation exercise. 6. Provide appropriate information design to support discussions with stakeholders including reference to options for sediment movement volumes, space for sediment drying / processing area, gravel quantities / sourcing, water volume and retention requirements for functional filtration and water quality improvements, options for widening boundary onto playing fields if needed, etc re design and permitting constraints. 7. Develop the preferred option into a more formalised and feasible outline design that can be used in wider consultation and in early permitting discussions to enable an iterative design process and clearly specifies the required detail going forwards. 8. Identify the requirements for gaining consents. 9. Create / initialise necessary documentary evidence and applications for consents to build, using approved outline designs. 10. Attend regular meetings with the project manager and external stakeholders (as agreed) to inform design process. See detail in section 4. 11. Include detail of the likely management and maintenance requirements post construction to ensure sustainability and longevity of the constructed wetland. To include description, scale and optimal frequency of necessary ongoing maintenance activities where relevant. For more information about this opportunity, please visit the Delta eSourcing portal at: https://www.delta-esourcing.com/tenders/UK-UK-Watford:-River-regulation-and-flood-control-works./BQW35F353G To respond to this opportunity, please click here: https://www.delta-esourcing.com/respond/BQW35F353G ## Key Details | Field | Value | | --- | --- | | Publication source | Find A Tender Service | | Latest notice | https://www.find-tender.service.gov.uk/Notice/049440-2025 | | Notice type | UK4 - Tender Notice | | Procurement type | Standard | | Procurement category | Works | | Procurement method | Open | | Procurement method details | Below threshold - open competition | | Tender suitability | SME | | Awardee scale | Not specified | | All stages | Tender | ## Dates | Field | Value | | --- | --- | | Publication date | 18 Aug 2025 | | Submission deadline | 12 Sep 2025 | | Future notice date | Not specified | | Award date | Not specified | | Contract period | 5 Oct 2025 - 20 Mar 2026 | | Recurrence | Not specified | ## Values | Field | Value | | --- | --- | | Tender value | £25,000 | | Lots value | £25,000 | | Awards value | Not specified | | Contracts value | Not specified | ## Status | Field | Value | | --- | --- | | Tender status | Active | | Lots status | Active | | Awards status | Not specified | | Contracts status | Not specified | ## Buyer | Field | Value | | --- | --- | | Main buyer | LOT C: RIVER COLNE CONSTRUCTED WETLAND OUTLINE DESIGN AND FEASIBILITY | | Locality | WATFORD | | Post town | Watford | | Postcode | WD17 3EX | | Country | England | | ITL 1 | TLH East (England) | | ITL 2 | TLH2 Bedfordshire and Hertfordshire | | ITL 3 | TLH27 South West Hertfordshire | | Local authority | Watford | | Electoral ward | Park | | Westminster constituency | Watford | | Delivery location | Not specified | ## CPV Codes ### Divisions - 45 - Construction work - 71 - Architectural, construction, engineering and inspection services ### Codes - 45246000 - River regulation and flood control works - 45246200 - Riverbank protection works - 71241000 - Feasibility study, advisory service, analysis ## Release History - 18 Aug 2025 at 11:05 - Tender - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/049440-2025 ## Documents - https://www.find-tender.service.gov.uk/Notice/049440-2025 18th August 2025 - Tender notice on Find a Tender ## Notice URLs - https://www.delta-esourcing.com/delta/project/buyer/editTenderNotice.html - https://www.delta-esourcing.com/respond/BQW35F353G - https://www.delta-esourcing.com/tenders/UK-UK-Watford:-River-regulation-and-flood-control-works./BQW35F353G - 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-0589a1. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-0589a1.json.