These 91 silos, built between 1935-1950, of concrete vertical cell construction, were the original type constructed at rail sidings on those lines intended to serve the Geelong Terminal Elevator.
All cells have a common height of 29.6 metres, with bin diameters being 8.2, 9.2 or 10.1 metres, with capacities ranging from 1900 tonnes to 4500 tonnes.
These units are all open topped bins with corrugated galvanised iron roofs. Receival and outloading rates are a nominal 110 tonnes per hour.