BUTTERHILL MILL B u t t e r h i l l M i l l W e i r & F i s h P a s s The Wandle Trust contracted Land and Water Services Ltd to make modifications to the weir at Butterhill Mill on the River Wandle in Sutton, Greater London. The current weir structure was restricting water flows down the fish pass and causing sediment build up at the weir, due to slow water flows, smothering the gravel bed. Land and Water carried out an initial survey to

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