Jack calls this kind of trailer a bulker. It carries dry powders like concrete, sand, or ammonium nitrate. This one probably carried concrete or sand. He says they use air to transfer the product from one place to another. Unloading a bulker is called “blowing it off” to the people who do it. In Prudhoe they store the product in silos.
Don’t forget you can increase the resolution on a YouTube video by clicking on the settings symbol in the lower right hand corner and choosing a higher number than what YouTube picked for you.
More snow in the engine, but this time it’s from someone going in the ditch! It seems to happen to everyone eventually and it’s better to land in the cushy snow instead of just about anywhere else. After it got pulled out they cleaned the snow off and drove it away!
(Identifying marks have been removed for privacy.)