24. Enhancing fish passage
Theme: Water Quality, Habitats and Wildlife
- That whatever the flow level, the river and its associated habitats, including banks and floodplains, are managed to support chalk stream species
- That water quality, temperature and river bed quality are such that they support chalk stream ecology
This project aims to ensure that Hertford’s weirs do not create a barrier for fish migration or movement
Several large weirs owned by the EA are present along the river in Hertford, for example the siphon at Sele Mill and the EA’s gauging weir. Currently these are a barrier to fish, and also significantly impound the river leading to siltation upstream, artificially deep water and possible flood risk above the structures. Removing, lowering or notching the weir or installing fish passes would be a beneficially effect, both in terms of fish passage and river bed health.