Granular material storage with input and output

A method of storing and dispensing granular material at a work site, the method comprising:

• providing a conveyor assembly comprising a lower output conveyor apparatus, an upper input conveyor apparatus, a rigid upper frame, and a conveyor raising mechanism operative to raise the upper input conveyor apparatus and rigid upper frame from a lowered transport position, adjacent to a lower portion of each silo, to a raised operating position, adjacent to an upper portion of each silo;
• transporting the conveyor assembly in the transport position to the work site and releasably securing the conveyor assembly to a fixed conveyor location on the site surface;
• transporting a plurality of silos to the work site and releasably securing a bottom end of each silo to a fixed silo location on a site surface adjacent to the conveyor assembly, each silo comprising a lower output port and an upper input port;
• with the upper input conveyor apparatus and rigid upper frame in the raised operating position adjacent to an upper portion of each silo, locking an upper portion of each silo to the rigid upper frame of the conveyor assembly;
• operating the upper input conveyor apparatus to receive granular material at an upper conveyor input thereof and direct the granular material into the upper input ports of the silos;
• operating the lower output conveyor apparatus to receive granular material from the lower output ports of selected silos and discharge the granular material at a lower conveyor output.