Source: https://tendernation.io/opportunities/01a13cc4-2220-71ff-9f9f-ded314474780/nutrient-neutrality-developing-detailed-design-guidance-for-wetland-mitigation awarded GB open procedure Suitable for SMEs # Nutrient Neutrality -Developing detailed design guidance for wetland mitigation solutions to nutrient pollution [Natural England](https://tendernation.io/buyers/natural-england) Estimated value £30,000 to £48,000 Published 20 Jul 2023 Deadline Closed 16 Aug 2023 ## Who can bid - Buyer says suitable for SMEs The buyer ticked “suitable for SMEs” on the notice. Anyone can still bid. - Small contract value Valued under £135,018 including VAT, the lowest Procurement Act threshold for goods and services. - Open procedure Anyone can submit a full tender; there is no shortlisting stage. [More contracts for small businesses and VCSEs](https://tendernation.io/opportunities/for-small-businesses) ## About this tender The objective of this project is to develop detailed design guidance, based on the best-practice approaches taken by professionals in the feasibility, design and maintenance of treatment wetlands for nutrient mitigation. This will ensure that a set standard for high-quality nature-based solutions is delivered through the Nutrient Mitigation Scheme and other nutrient neutrality mechanisms. The guidance will be used by design and build contractors, as well as local authorities and consenting bodies to ensure wetland proposals are technically robust and will complement the structure of the wetland mitigation framework, as far as is achievable and logical. This should focus on integrated constructed wetland, free surface wetland and other viable wetland mitigation proposals, taking into account the degree of certainty that nutrient reductions will be achieved, alongside a range of other considerations including compatibility with wider habitat restoration opportunities. The guidance must: Set out the processes, calculations, tools and formatting of wetland design processes from feasibility and concept design stages through to detailed design. Utilise at least one case study to demonstrate real-world application of the principles and processes within the guidance. Outline planning, permitting and consenting considerations and signposting to how to carry out these stages effectively. Specify the tasks involved in implementation, operation and maintenance of treatment wetlands, and their associated infrastructure, including timescales and waste management processes. Set out how the above stages key into the existing wetland mitigation framework with degrees of confidence assigned to each process where more than one pathway is presented Provide information on designing wetlands in areas of competing interests; such as where flood management or abstraction pressures exist. (e.g. minimising the impact of abstraction/offtake on depleted reaches of watercourses) Contain information on opportunities to integrate positive biodiversity outcomes within and adjacent to the wetland proposals. Be written for an informed audience, including technical designers and engineers, local authorities and other consenting bodies, who can be assumed to have an existing basic understanding of wetland processes and design parameters. Outline how to deliver high-quality wetlands that are robust to changing climatic variables. (e.g. how to design wetlands where flows may become more variable due to future prolonged drought and rainfall events) Provide a description of how costs would be determined from a detailed design (i.e. what are the cost items associated with the design and delivery of a treatment wetland solution). Be based on the best available evidence. The design approaches should be bespoke and proportional to the types of solutions covered in the guidance and include the parameters used to delineate the selection of one design process over another. Read full description ## CPV classification Environmental engineering consultancy services Source Contracts Finder (UK) [View official notice](https://www.contractsfinder.service.gov.uk/notice/a13dfeb8-c91c-417b-bc19-bff0ae1586d6) 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 Natural England: past awards and live tenders](https://tendernation.io/buyers/natural-england) [Sector More Architecture, engineering & surveying tenders](https://tendernation.io/sectors/architecture-engineering-surveying) ## More tenders like this [Asbestos Management Framework · Home Group · 25 days left · 13 Nov 2026](https://tendernation.io/opportunities/01a15476-5fff-736e-ae2e-0c8a400c7297/asbestos-management-framework) [Infrastructure works consultancy services – Contrôle extérieur des chaussées · Collectivité européenne d Alsace · 29 days left · 17 Nov 2026](https://tendernation.io/opportunities/01a15183-1730-733b-8247-a32bbbe2211c/france-infrastructure-works-consultancy-services-controle-exterieur-des-chau) [Architectural, construction, engineering and inspection services – Single Party Framework Agreement for Architect Led Integrated Design Team Services for Fire Safety Remediation Works for Dublin City Council · Dublin City Council · 5 days left · 23 Oct 2026](https://tendernation.io/opportunities/01a15183-0a15-7156-849b-5a223dd6d615/ireland-architectural-construction-engineering-and-inspection-services-sin) [Architectural, construction, engineering and inspection services – Būvprojekta izstrāde un autoruzraudzība fasādes siltināšanai kārtās Dzirciema ielā 16, Rīgā – 1.kārta, C korpuss · Rīgas Stradiņa universitāte · 28 days left · 16 Nov 2026](https://tendernation.io/opportunities/01a15183-3915-73d1-83e6-c378f9f7a926/latvia-architectural-construction-engineering-and-inspection-services-buvp) [Technical assistance services – Suivi et gestion de chantiers de réhabilitation de sites pollués · SPAQuE · 15 days left · 3 Nov 2026](https://tendernation.io/opportunities/01a15183-155e-73c2-a593-9e17375422ac/belgium-technical-assistance-services-suivi-et-gestion-de-chantiers-de-rehab) [Engineering design services for the construction of civil engineering works – Dokumentace pro povolení záměru stavby č. 9567 Radlická radiála JZM - Smíchov; v úseku MÚK Bucharova – MÚK Jinonice · Hlavní Město Praha · 15 days left · 3 Nov 2026](https://tendernation.io/opportunities/01a15183-0c15-72b2-bb19-c3ab1550e67e/czechia-engineering-design-services-for-the-construction-of-civil-engineering)