This list of highest bridges includes bridges with a deck height of at least 250 metres (820 ft). The deck height of a bridge is the maximum vertical drop distance between the (the road, rail or other transport bed of a bridge) and the ground or water surface beneath the bridge span. Deck height is different from structural height, which is a measure of the maximum v. The difference between tall and high bridges can be explained in part because some of the highest bridges are built across deep valleys or gorges. For example, the is the highest bridge in the world, but it is not in the top 20 tallest bridges. This bridge spans a deep river gorge. The bridge's two towers, built on either rim of the gorge, are 262 metres (860 ft) tall, but due to the depth of the river gorge, the deck height of the Huajiang Canyon Bridge is 625 metres (2,051 ft).
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