11. Kingfisher Gardens Fish Pass

Aims: Involve people with their local waterbodies; Improve wildlife corridors

Water body: Colne Brook
Project description

Installation of fish and eel passes at Thorney Mill weir on the River Colne Brook. The successfully modified weir uses a baffle pass design. This involves precisely positioning rectangular baffles across the weir to increase water depth and reduce velocity in addition to providing resting locations for fish attempting to traverse the structure.

Project lead: Groundwork South
Project partners: Environment Agency
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Project start: 2017
Project end: 2018
Funding source: Affinity Water Enforcement Undertaking , Heritage Lottery Fund

Design by LTD Design Consultants and build by Garganey Consulting. From an original concept by the Herts and Middlesex Wildlife Trust.