Operating a pneumatic rocker shovel. This appears to be an EIMCO rocker shovel. They operated on compressed air and the operator would drive it into the "muck", broken rock, load the shovel. A gable floor ore car was pushed up to its back, where the photographer is standing. The shovel was then lifted quickly and when it reached its limit it hit a stop bar. The rocks were thrown out of the shovel into the ore car.
Bazza155
Operating a pneumatic rocker shovel. This appears to be an EIMCO rocker shovel. They operated on compressed air and the operator would drive it into the "muck", broken rock, load the shovel. A gable floor ore car was pushed up to its back, where the photographer is standing. The shovel was then lifted quickly and when it reached its limit it hit a stop bar. The rocks were thrown out of the shovel into the ore car.