Would you mail me this valuable link please?
Tracking it down now. I first heard the details on a radio news item. I haven't seen a printed article on the net yet.
There is a further bit of information on the vulnerability of rail bridges carrying coal to power plants. The backlog of supply on the ground is at very low levels. Estimates are 40 to 45 days vs typical 60 to 90 days. See article here. Think about how long it takes to replace a rail bridge over a river. Longer than 45 days.