I am not a rotary pilot but I have been involved in H&S of and on over the last thirty years including railway and aviation projects. I am very surprised that the contractor did not have possession of the line for the few minutes of each pass. It would not have been that disruptive. I cannot believe that they passed over an occupied Gondola. I would have sacked any crane driver in the same situation. This said I feel for the pilot as well as the victims. It isn't something which you get over.