They had back up for their electrical power also and ran it in the same conduit as the main. When the main blew it took the backup with it. Poor design at best. And I agree that they may have had backup refrigeration but where would they get the power for it?

In any case they are back up and running, their stock is down a lot so I picked some up today. They report earnings next week but of course the outage will be reported for the next quarter. With MGB and HET running up today MGG may be close behind.