A new filtering system has provided a temporary solution to a years-long problem of a harbour’s water turning orange, bosses have said.
Tests have identified iron ochre getting into Whitehaven’s Queens Dock in Cumbria through a culvert draining water from the Bransty railway tunnel, resulting in a discolouration to the harbour.
Whitehaven Harbour Commissioners (WHC) said the “amazing” transformation to the water was “most likely” the result of a new filter installed by Network Rail in the tunnel, but it was “not yet a permanent fix”.
Network Rail said the system was temporary while “essential” work was undertaken, but the firm would play its part in seeking a long-term solution.