Potash mines and mining in Saskatchewan: shot of a large mine building, of a string of tank cars on a service track, of a diesel locomotive moving by in the direction of the camera. Rising shot of men from inside a mine lift, of the gate of the mine lift opening at a given level, men walking away from the camera down a tunnel. Exterior shots of the mine lift going up, coming down, past the camera level. Shots of a laser unit used for sighting down tunnels, a red light shining directly into the camera lens. Head-on and side views of a giant multi-rotor digger in operation. MCUs of huge rotors chewing into a potash vein. Lengthy TRAVELLING SHOTS through miles of tunnels in the sylvite potash mine, from the back seat of a vehicle, two men in the front seat. Shot of potash pouring onto a conveyor. (00/11/1971)