Viaduct /vaɪədʌkt/(lat. viadus – road and via – to pass) – a bridge over a deep ravine or mountain gorge; V. are built when it is technically and economically impossible to fill up a ravine or gorge. V.t-b. (common), made of metal, stone and concrete (rare), usually multi-span (arch or beam system), with high supports.
Ex: In open-pit mining operations, conveyor viaducts are commonly used to carry mined materials, such as coal, ore, or aggregates, from the extraction area to processing or storage facilities.