Never enter a bin when unloading equipment is running, whether or not grain is flowing from the outlet. These locations are completely inappropriate play areas. Never transport children in empty hopper wagons or grain trucks. Grain flow can cover them quickly, before they or the combine operator realizes what is happening. Don't enter a bin with automatic unloading equipment without locking out the control circuit.
Dangers result from molds, blocked flow, cavities, crusting, and grain avalanches.
Beware of steep piles of grain. Dislodge them from above, if possible, with a long pole, rather than with a short shovel. Equipment noise may block out or garble your calls for action or help. The second person may fall or stumble in the panic and haste of climbing and running to shut down the equipment. Always have three people involved when entering a questionable storage situation.