A pier is a raised structure in a body of water typically supported by well-spaced piles or pillars. Bridges buildings and walkways may all be supported by piers. Their open structure allows tides and currents to flow relatively unhindered whereas the more solid foundations of a quay or the closely spaced piles of a wharf can act as a breakwater and are consequently more liable to silting. Piers can range in size and complexity from a simple lightweight wooden structure to major structures extended over 1600 metres. In American English may be synonymous with a dock.
Piers have been built for several purposes and because these different purposes have distinct regional variances the term tends to have different nuances of meaning in different parts of the world. Thus in North America and Australia where many ports were until recently built on the multiple pier model the term tends to imply a current or former cargo-handling facility. In Europe in contrast where ports more often use basins and river-side quays than piers the term is principally associated with the image of a Victorian cast iron pleasure pier. However the earliest piers pre-date the Victorian age.
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