How much dust disturbance would occur during construction of the temporary weir?
Dust is only expected to affect a small area due to the width of the water channel at the weir site. Increased dust levels are most likely to be generated by vehicles, but earthworks and use of machinery will also generate dust which may have a localised impact on migratory birds. The dust may affect roosting sites by settling on nearby vegetation or affect foraging by settling on mudflats. These would only be short term effects. Dust is also a pollutant that can cause health issues (700Kb PDF) for sensitive people. As the temporary weir would be located in a sparsely populated area, the risks of dust pollution for people are considered manageable.
