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Reduce the water levels and significantly increase habitat - Option Orange
A map of the scheme for this option.
We will keep the gates at Island Barn. We will remove gates at Molember and Viaduct. The river would start to become a more natural environment. There would be increases to plant and animal habitat along and in the river for at least 2km upstream of the scheme.
All the gates at Molember, Viaduct and Royal Mills sluices would be removed. The gates at Island Barn sluice would be replaced with new gates. The gates at Zenith, Wilderness and Royal Mills would be removed and rock ramp fish passes installed on the existing structures at Zenith and Wilderness. There would be localised infilling of the channel upstream of the structure at Royal Mills to remove any low areas in this section of the river. This option offers a reduction in the number of gates throughout the Scheme and the greatest opportunity to enhance the river environment along this reach of the river.
All the gates will be removed, but the concrete piers will be retained. The removal of the gates would result in a reduction of 1.6m in water level upstream of the structure compared to the present-day situation. The water levels upstream of Molember sluice would be similar to the level of the water downstream of the structure.
Island Barn Sluice
All the gates would be replaced with new gates, with the intention to automate their operation. There would be no change in water level upstream of structure.
Viaduct Sluice
All the existing gates would be removed, and a new rock ramp fish pass would be installed within the structure whilst retaining the existing concrete piers and bridge. This would result in a 2.3m reduction in the water level upstream of the railway viaduct compared to the present-day situation, which has a water depth of approximately 3.1m.
Zenith Sluice
All the existing gates, electrical equipment and the walkway would be removed. A new rock ramp fish pass would be installed on the existing structure. There would be no change in water level upstream of the structure.
Wilderness Sluice
All of the existing gates and electrical equipment would be removed. A new rock ramp fish pass would be installed on the existing structure. There would be no change in water level upstream of the structure.
Royal Mills Sluice
The existing gate would be removed and the channel upstream of the structure locally infilled to remove any low spots along the riverbed. The removal of gates at Viaduct Sluice will result in the channel upstream of Royal Mills running dry under normal flow conditions.
Water level graph for this option
A map of the scheme for this option.
We will keep the gates at Island Barn. We will remove gates at Molember and Viaduct. The river would start to become a more natural environment. There would be increases to plant and animal habitat along and in the river for at least 2km upstream of the scheme.
All the gates at Molember, Viaduct and Royal Mills sluices would be removed. The gates at Island Barn sluice would be replaced with new gates. The gates at Zenith, Wilderness and Royal Mills would be removed and rock ramp fish passes installed on the existing structures at Zenith and Wilderness. There would be localised infilling of the channel upstream of the structure at Royal Mills to remove any low areas in this section of the river. This option offers a reduction in the number of gates throughout the Scheme and the greatest opportunity to enhance the river environment along this reach of the river.
All the gates will be removed, but the concrete piers will be retained. The removal of the gates would result in a reduction of 1.6m in water level upstream of the structure compared to the present-day situation. The water levels upstream of Molember sluice would be similar to the level of the water downstream of the structure.
Island Barn Sluice
All the gates would be replaced with new gates, with the intention to automate their operation. There would be no change in water level upstream of structure.
Viaduct Sluice
All the existing gates would be removed, and a new rock ramp fish pass would be installed within the structure whilst retaining the existing concrete piers and bridge. This would result in a 2.3m reduction in the water level upstream of the railway viaduct compared to the present-day situation, which has a water depth of approximately 3.1m.
Zenith Sluice
All the existing gates, electrical equipment and the walkway would be removed. A new rock ramp fish pass would be installed on the existing structure. There would be no change in water level upstream of the structure.
Wilderness Sluice
All of the existing gates and electrical equipment would be removed. A new rock ramp fish pass would be installed on the existing structure. There would be no change in water level upstream of the structure.
Royal Mills Sluice
The existing gate would be removed and the channel upstream of the structure locally infilled to remove any low spots along the riverbed. The removal of gates at Viaduct Sluice will result in the channel upstream of Royal Mills running dry under normal flow conditions.
A map of the scheme for this option. 
Water level graph for this option
