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A single-unit grain elevator operated by DeBruce Grain Inc. at Wichita, Kansas, USA consists of 310 elevators arranged in a triple row on either side of the central loading tower or `head house'. The unit is 828 m (2,717 ft) long and 30.5 m (100 ft) wide. Each tank is 37 m (120 ft) high and has an internal diameter of 9.1 m (30 ft), giving a total storage capacity in excess of 7.3 million hl (20,000,000 bushels) of wheat. It is estimated that this is enough to supply the flour for all the bread consumed in the USA for six weeks. Grain elevators are notoriously explosive due to large amounts of superfine grain dust in the air in and around them and on 8 June 1998 the DeBruce facility suffered a devastating series of explosions that resulted in 8 deaths and 10 people being injured.
