Watford Borough Council: Lot C: River Colne Constructed Wetland Outline Design and Feasibility

UK-Watford: River regulation and flood control works.

Scope

Description: 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

Total value (estimated):

GBP 25,000 excluding VAT GBP 30,000 including VAT

Description

Contract dates (estimated)
06/10/2025 to 20/03/2026
CPV Classifications:
45246000 - River regulation and flood control works. 45246200 - Riverbank protection works. 71241000 - Feasibility study, advisory service, analysis.
   
Contract can be extended:
No

Extension Date:


Delivery regions:
Not Provided
Award criteria:
Quality criterion - Name: Costs / Weighting: 40
Quality criterion - Name: Method, design and permitting experience, programme, CDM, Social value / Weighting: 60


   

Submission

Enquiry deadline: 05/09/2025 Time: 17:00Tender submission deadline: 12/09/2025 Time: 17:00
Submission address and any special instructions: https://www.delta-esourcing.com/delta/project/buyer/editTenderNotice.html
An electronic auction will be used: No

Procedure

Procedure type: Below threshold - open competition

Contracting authority

       Lot C: River Colne Constructed Wetland Outline Design and Feasibility, PDGQ-4877-NMGQ
       Town Hall, Watford, WD17 3EX, United Kingdom
       Tel. 01923278381, Email: mitchelle.kasimu@watford.gov.uk
       Contact: Mitchelle Kasimu

Organisation type: REGIONAL_AUTHORITY
Devolved regulations that apply: None