Bridgetown Weir: Fish Passage Improvements (Construction)

Concepts

• construction work
• bridgetown weir
• callington
• westcountry rivers trust
• strategic exe weirs
• bespoke fish passage solutions
• natural movements of native migratory fish
• strategic exe weirs team
• native migratory fish populations
• installation of seasonal fish screen infrastructure

Location

Description

Through the Strategic Exe Weirs programme Westcountry Rivers Trust aims to deliver bespoke fish passage solutions at all River Exe barriers to maximise migration flow windows and restore natural movements of native migratory fish. Working in partnership with the River Exe and Tributaries Association, and supported by the Environment Agency and South West Water, the Strategic Exe Weirs team has ambitious plans to develop and deliver bespoke projects for multiple man-made barriers throughout the catchment, as part of efforts to secure a sustainable future for native migratory fish populations and associated fisheries. Bridgetown Weir acts as a gateway to highly important recruitment habitat in central Exmoor National Park, particularly for Atlantic salmon and sea/brown trout. It is the aim of this current project to ensure every migratory salmonid that reaches Bridgetown Weir has the opportunity to continue upstream migration and maximise utility of the pristine recruitment habitat in the upper River Exe. The current project also aims to ensure downstream migrating fish have maximum opportunity to continue down the main river, while considering local constraints. We are seeking a suitably qualified and experienced contractor to undertake the following elements: 1. Installation of a Larinier Fishway within an existing pool-traverse fish pass channel. 2. Excavation and reinforcement with stone of the downstream pool and adjacent river bank to accommodate the Larinier Fishway. 3. Install stone to effectively extend the weir toe inline with the Larinier Fishway to maximise attraction efficiency. 4. Level the weir crest to reduce competing attraction flows. 5. Installation of seasonal fish screen infrastructure across the leat entrance. 6. Installation of a maintenance walkway for the fish screen. 7. Installation of a fish chute adjacent to the fish screen, underfilled with stone. 8. Excavation and reinforcement with stone of a small pool to accommodate the fish chute outlet. WRT are under obligation to ensure compliance with principles of transparency, equality and non-discrimination. As such WRT is conducting a formal open tender process in which all bidders will be treated equally, with no discrimination and through a transparent process. We look forward to receiving your tender bid.

CPV Codes

• 45000000 - Construction work
• 71300000 - Engineering services

Indicators

• Contract is suitable for SMEs.

Other Information

Please read the attached tender documents in full before requesting further information or documents. The WRT procurement policy adheres to National Rules. It also incorporates a number of principles that we believe demonstrate our commitment to fulfilling our charitable objectives and ensuring the fairness and integrity of our procurement practices that demonstrate the 'most economically advantageous tender' will be selected while recognising environmental considerations and minimising the risk to WRT in terms of liability. WRT will make use of an NEC3 Engineering and Construction Short Contract to facilitate the work. Westcountry Rivers Trust website https://wrt.org.uk/about-us/contractor-opportunities/ Bridgetown Weir Invitation To Tender 1. ITT_Bridgetown_Construction.pdf Bridgetown Weir Photographic Record, including access 2. Bridgetown_Photographic Record.pdf Bridgetown Weir Detailed Designs - Location & General Arrangement 3a. Bridgetown_Detailed Design Drawings_Part 1 of 5.pdf Bridgetown Weir Detailed Designs - Larinier Section and Unit 1 3b. Bridgetown_Detailed Design Drawings_Part 2 of 5.pdf Bridgetown Weir Detailed Designs - Larinier Units 2 and 3 3c. Bridgetown_Detailed Design Drawings_Part 3 of 5.pdf Bridgetown Weir Detailed Design - Smolt Chute and Smolt Screen 3d. Bridgetown_Detailed Design Drawings_Part 4 of 5.pdf Bridgetown Weir Detailed Designs - Screen Maintenance Walkway 3e. Bridgetown_Detailed Design Drawings_Part 5 of 5.pdf Bridgetown Weir Designer's Risk Assessment 4. Bridgetown_Designer Risk Assessment.pdf Bridgetown Weir Design Philosophy and Buildability Statement 5. Bridgetown_Design Philosophy and Buildability Statement.pdf Bridgetown Weir NEC3 Engineering and Construction Short Contract 6. NEC3_Bridgetown_Construction_20210527.docx WRT Biosecurity Protocol 7. WRT BioSecurity Procedure 2018.pdf Bridgetown Weir Pre-design Topographic Survey. Provided in case useful to prospective contractors when preparing tender response. 8a. Bridgetown_Topographic Survey Plan 1.pdf Bridgetown Weir Pre-design Topographic Survey. Provided in case useful to prospective contractors when preparing tender response. 8b. Bridgetown_Topographic Survey Plan 2.pdf Bridgetown Weir Pre-design PEA summary 9. PEA Summary_Bridgetown Weir.pdf Bridgetown Weir Heritage Impact Assessment 10. Bridgetown_Heritage Statement.pdf