If you use bagged Blaschak this year it can freeze if left in the bag. I store in a heated garage at work, and bring home a bag or two every nite. On the weekends those bags that have been in my van longer than 4or 5 hours will freeze. They really water it down, sometimes I can lay the bags on thier side and get almost a quart of water out of it. It's not that big a deal, I have about 20" of tile in front of the stove I just set the frozen bag in front of the stove for about 5 min. it thaws fast.
On another thought if a gallon of water weighs 8 pounds, a quart should weigh 2 pounds. 50 bags of coal in a ton X 2 pounds = 100 pounds of water.
I guess better wet than dusty though.