"It is impossible to reconcile a maximum transport approach to salmon recovery with protection of the remaining diversity of salmon and steelhead populations in the Snake River basin, " the report notes.

CNN: Dam removal: Too little, too late for salmon?

The maximum effective transport radius is 300 kilometres (186 miles).

ECONOMIST: Face value

Transport Minister Graham Cregeen said the union is looking to cause "maximum disruption".

BBC: Isle of Man buses