Further to my original letter and in response to those who wrote denying any environmental impact of Archimedes Screw hydro generators upon migratory fish please note the following.
As quoted in the Yorkshire Post on 2 April, Brian Shields, Senior Fisheries Specialist for the Environment Agency, said “We believe there is sufficient evidence that fisheries have been affected for some form of action to be taken”.
This is as a result of two years data obtained at Settle where migratory fish numbers have crashed upstream of the Hydro. One of the options being considered is, “a ban on hydro operation for 12 hours a day during the peak salmon migration season in the autumn”.
This alone should lead to a moratorium in respect of the Ruswarp scheme whilst the EA and NYMNP reconsider the impact of this even more critically sited project.
Stewart Bates, Glaisdale by email