| Washing plant |
| Part of plant, usually found in sand and gravel quarries, that washes fine materials off the coarser gravels. See Scrubber barrels and Fine material washers.
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| Water Bowser |
| Equipment incorporating a water tank used to spray a fine mist of water onto the surface over which it is towed. |
| Water consumption |
| The measured use of water (usually metered) in an operation. Some may be from the local water main; however much water in quarries is obtained from licensed surface or underground abstraction, or from surface runoff. |
| Water Table |
| The top of the water surface in the saturated part of an aquifer.
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| Water use |
| The use of water in an operation. Some may be from the local water main; however much water in quarries is obtained from licensed surface or underground abstraction, or from surface runoff.
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| Wet Screening |
| Separation of coarser and finer material by passing it in suspension with water over a vibrating metal plate which has apertures of the desired size through which the finer material falls. |
| Wet Suppression |
| Control of dust levels during processing operations by the use of water sprays into crushers, on to screens or conveyor belt transfer point. |
| Wet working |
| Operation of a quarry (particularly a sand and gravel quarry) below the water table. The pit is therefore water-filled and dredging is employed to extract the mineral. |
| Wetland |
| Areas at the interface between aquatic and terrestrial conditions that are commonly flooded and support vegetation typically adapted for life in saturated soil conditions. Wetlands generally include swamps, marshes, bogs, and similar areas. |
| WHO |
| The World Health Organisation, is the United Nations specialised agency for health. WHO's objective, as set out in its Constitution, is the attainment by all peoples of the highest possible level of health. Health is defined in WHO's Constitution as a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity.
www.who.int/en/. |
| Wind |
| The movement of air across the ground surface as a consequence of natural forces. |
| Wind Fence |
| Fencing designed to reduce local wind speeds and provide downwind protection from wind blow dust. |