]> 2026-04-14T05:42:26+00:00 Case study:River Wandle: Butter Hill Phase 1 500 en Draft Weir modification Creation of fish passes Wandle Trust Wild Trout Trust Environment Agency London Borough of Sutton Great Britain Environment Agency Thames Water Wandle River Restoration Fund Defra Yes No Yes false No 51.368093443332,-0.16210089437664 Bella Wandle Trust Davies Weir modification,,,Creation of fish passes, ,,, Please see the parent project (River Wandle Restoration Project) for the final results on this work, combined with the other phases. 12757 Wandle Trust, Wild Trout Trust, Environment Agency, London Borough of Sutton, 2009-01-01Z 2454832.5 Complete This Project is part of a larger scheme with the overall aim of establishing a population of brown trout in the Carshalton arm of the River Wandle for the first time in over 80 years. For more background on this larger scheme, please refer to the parent project "River Wandle Restoration Project". This project was delivered in three phases working with the Environment Agency, the Wild Trout Trust and local volunteers.   The first phase involved lowering three small weirs, which were a potential barrier to fish trying to move upstream to spawn, and restoring the natural flow of the river in this section. The second phase involved a ‘Practical Visit’ from the Wild Trout Trust through which Wandle Trust staff and over 50 volunteers were trained in simple river enhancement techniques. Woody debris was secured in the channel to vary the flow and create local scour on the river bed, increasing habitat diversity. Cover logs were raised off the riverbed and anchored to enable fish to take cover underneath when vegetation is sparse in winter. The final phase incorporated the Environment Agency installing a Larinier fish pass on the large 1.8 m high weir at Butter Hill. River Wandle: Butter Hill Phase 1 river wandle: butter hill phase 1 No 360 London Thames Wandle (Carshalton Branch at Carshalton) wandle (carshalton branch at carshalton) 10 - 100 km² 160 100 - 200 m Wandle (Carshalton Branch at Carshalton) GB106039017640 Fisheries Habitat and biodiversity 10 - 50 k€ GB106039017640 Wandle (Carshalton Branch at Carshalton) 2011-12-31Z 2455926.5 2010-01-01Z 2455197.5 2014-04-03T08:45:29Z 2456750.864919 2018-11-01T12:14:57Z 2458424.0103819 River Wandle: Butter Hill Phase 1 500 1 plainlist 5 [[Category:Case study]] [[Project title::!River Wandle: Butter Hill Phase 1]] [[Subcatchment title::Wandle (Carshalton Branch at Carshalton)]] River Wandle: Butter Hill Phase 1# QUERYbb0fb259990bca587c6dce6c9b26a089 Case study:Wandle Trout Restoration 500 en Wandle Trout Restoration REDI 102 en REDI