Source: https://tendernation.io/opportunities/01a13c89-d529-7086-b601-f49de85477eb/habitat-improvement-and-tilting-weir-installation-old-hall-marshes closed GB open procedure Suitable for SMEs # Habitat improvement and Tilting Weir installation - Old Hall Marshes [Royal Society for the Protection of Birds](https://tendernation.io/buyers/royal-society-for-the-protection-of-birds) Estimated value Not stated Published 10 Jan 2022 Deadline Closed 17 Feb 2022 ## Who can bid - Buyer says suitable for SMEs The buyer ticked “suitable for SMEs” on the notice. Anyone can still bid. - Buyer says suitable for VCSEs The buyer ticked “suitable for voluntary, community and social enterprises” on the notice. - 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 To improve the habitat found at RSPB Old Hall Marshes we propose to carry out the following, we will use material generated from reprofiling existing footdrains to renovate existing crossing points around the reserve. We propose to install a Tilting weir (RSPB to provide) and finally renovate several small islands into one larger island and top with shingle. The works will ensure that we have increased compartmentalisation across the marshes, with finer and more water control. This will enable better management potential and the ability to be more dynamic with water levels. It will also mean that we have mitigated some of the potential impacts of climate change, as water will be better directed on site to critical areas. The newly reprofiled footdrains will create enhanced and new edges for breeding and passage waders including locally important numbers of lapwing and redshank. The new weir will allow the unrestricted passage of eels across the marshes and ensure better and more water control in addition to the renovated crossing points. The new and improved island will create new breeding habitat for the red listed and rare little tern, a designated species in the Blackwater estuary. More details in the attached documents ## CPV classification Construction work Source Contracts Finder (UK) [View official notice](https://www.contractsfinder.service.gov.uk/notice/1bb283f9-ccc6-47df-808b-d9ac58f9117b) 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 Royal Society for the Protection of Birds: past awards and live tenders](https://tendernation.io/buyers/royal-society-for-the-protection-of-birds) [Sector More Construction work tenders](https://tendernation.io/sectors/construction-work) ## More tenders like this [Bannister Sports Centre Athletic Track Soft Market Testing Exercise · Harrow Council · 38 days left · 26 Nov 2026](https://tendernation.io/opportunities/01a1540d-d9e4-71cb-ad57-1603e9042fec/bannister-sports-centre-athletic-track-soft-market-testing-exercise) [Construction work – (WZNOWIONE POSTĘPOWANIE) Budowa i przebudowa kogeneracji gazowych o łącznej mocy 4,636 MWe i 5,729 MWt w Elektrociepłowni Ciechanów · Elektrociepłownia Ciechanów sp. z o.o. · 7 days left · 26 Oct 2026](https://tendernation.io/opportunities/01a156a9-8e72-7024-a07c-4da735079800/poland-construction-work-wznowione-postepowanie-budowa-i-przebudowa-kogene) [Demolition work – Rück- und Neubau Lichthochmaste · Hamburg Verkehrsanlagen GmbH · 6 days left · 26 Oct 2026](https://tendernation.io/opportunities/01a156a9-6ef0-7276-94e2-d5fa0cb2d6c7/germany-demolition-work-ruck-und-neubau-lichthochmaste) [Heating plant construction work – Petrašiūnų elektrinės elektrifikacija, įrengiant elektros energijos kaupimo įrenginius, dyzelinį generatorių ir rekonstruojant 6 kV skirstyklą (projektavimas ir rangos darbai) · Akcinė bendrovė „Kauno energija“ (PV) · 6 days left · 26 Oct 2026](https://tendernation.io/opportunities/01a156a9-6f1d-727f-a077-bc25dec93b92/lithuania-heating-plant-construction-work-petrasiunu-elektrines-elektrifikac) [Floor-covering work – Universität Leipzig, Leuschnerplatz, Global Hub, Forschungsneubau · Staatsbetrieb Sächsisches Immobilien- und Baumanagement, Zentrale, Zentralstelle Vergabe- und Vertragsmanagement · 2 days left · 22 Oct 2026](https://tendernation.io/opportunities/01a156a9-acfc-73ee-baab-9e699f88521a/germany-floor-covering-work-universitat-leipzig-leuschnerplatz-global-hub) [Building construction work – Budowa budynku mieszkalnego wielorodzinnego wraz z infrastrukturą techniczną w miejscowości Szczucin · KZN SIM Tarnów Sp. z o.o. · 6 days left · 26 Oct 2026](https://tendernation.io/opportunities/01a156a9-d859-7328-9ee6-a304ce645326/poland-building-construction-work-budowa-budynku-mieszkalnego-wielorodzinneg)