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Water tunnel
A water tunnel is an excavated conduit carrying water for supply or hydropower, built by drilling and blasting, tunnel boring machines, shields, or hydraulic hammers.
Water-sensitive urban design
Water-sensitive urban design (WSUD) is an urban planning approach integrating the whole urban water cycle into design, so stormwater is infiltrated and used near where it falls.
Water–cement ratio
The water–cement ratio, also called the water–cement factor, is the weight of mixing water divided by the weight of cement in a concrete or mortar mix, controlling concrete strength.
Waterborne diseases
Waterborne diseases are illnesses caused by bacteria, viruses, or parasites spread through drinking or recreational water, including cholera, typhoid, Giardia, and Cryptosporidium; John Snow's 1854 Broad Street pump investigation founded their study.
Waterford Flight
The Waterford Flight is a set of five consecutive high-lift locks, numbered E2 through E6, on the Erie Canal at Waterford, New York, raising vessels 169 feet.
Watergate complex
The Watergate complex is a residential, hotel, and office development on the Potomac River in Washington, D.C., known for the 1972 break-in that led to Nixon's resignation.
Waterline (Austin)
Waterline is a 74-story, 1,025-foot mixed-use supertall skyscraper in downtown Austin, Texas, and the tallest building in the state, opened in September 2026 with offices, 352 residences, and a hotel.
Waterloo & City line
The Waterloo & City line, nicknamed the Drain, is the shortest London Underground line, running between Waterloo and Bank since 1898 with no intermediate stops.
Waterloo Bridge
Waterloo Bridge is a road bridge across the River Thames in central London, built 1939 to 1945 and nicknamed the Ladies' Bridge for its wartime women workers.
Waterproofing
Waterproofing is the set of materials and construction methods used to prevent liquid water from penetrating foundations, basements, roofs, decks, and tunnels, and is distinct from dampproofing.
Waterway
A waterway is a river, canal, lake, or other stretch of water suitable for navigation by boats or ships, including navigable rivers, lakes, canals, and estuaries.
Wattle and daub
Wattle and daub, also called pole-and-daga, is a woven wooden lattice daubed with a sticky mix of soil, clay, dung, and straw, used in building for 6,000 years.
Wave equation analysis of pile driving
Wave equation analysis of pile driving is a computer-based method modeling stress-wave propagation through hammer, cushions, pile, and soil to predict driving stresses, blow counts, and pile bearing capacity.
Wawel Castle
Wawel Castle (Zamek Królewski na Wawelu), the former residence of Poland's monarchs on Wawel Hill in Kraków, was rebuilt in Renaissance style after 1504 and is now a museum.
Wayfinding
Wayfinding is the process by which people orient themselves and navigate through buildings and cities, and the signage and design systems supporting it; Kevin Lynch coined the term in 1960.
Weatherstripping
Weatherstripping seals the gaps around doors and operable windows with flexible strips of felt, foam, rubber, vinyl, or metal, keeping out air, dust, and noise.
Weir
A weir, also called a low head dam, is a barrier across a river that lets water flow over its top and raises the upstream water level.
Welcome to Fabulous Las Vegas sign
The Welcome to Fabulous Las Vegas sign, also known as the Las Vegas sign, is a neon sign on the southern Las Vegas Strip designed by Betty Willis in 1959.
WELL Building Standard
The WELL Building Standard is a voluntary rating system, launched in 2014 and administered by the International WELL Building Institute, that certifies buildings for occupant health and well-being.
Well House
Well House: a building over a well housing water-raising machinery such as a donkey wheel or horse gin; also the name of several listed houses and a scheduled monument in England.
Welland Canal
The Welland Canal is a ship canal in southern Ontario connecting Lake Ontario and Lake Erie, letting vessels bypass the roughly 99-meter elevation drop between the lakes.
Wells Cathedral
Wells Cathedral, formally the Cathedral Church of St Andrew, is a Church of England cathedral in Wells, Somerset, and the seat of the Bishop of Bath and Wells.
Wembley Stadium
Wembley Stadium is England's national stadium in Wembley, London, opened in 2007 with 90,000 seats, hosting England internationals, the FA Cup Final, and NFL games.
Wentworth Woodhouse
Wentworth Woodhouse is a Grade I listed country house at Wentworth near Rotherham, South Yorkshire, built from 1725, with over 300 rooms and England's longest domestic façade.
Wessex Water
Wessex Water is a privately owned water and sewerage company serving about three million customers in South West England, owned since 2002 by Malaysia's YTL Corporation.
West Edmonton Mall
West Edmonton Mall is a shopping mall and entertainment complex in Edmonton, Alberta, opened in 1981. The largest mall in Canada, it was the world's largest from 1985 to 2004.
West Gate Bridge
The West Gate Bridge is a cable-stayed steel bridge spanning the Yarra River in Melbourne, built 1968 to 1978 to link the city with its western suburbs.
West Hall
West Hall is the name of several historic buildings, most prominently a Grade I listed country house in Folke, Dorset, and a Grade II house in Kew, London.
West India Docks
The West India Docks, opened in 1802 on the Isle of Dogs in east London, were London's first commercial wet docks, built to trade in Caribbean sugar and rum.
West Montrose Covered Bridge
The West Montrose Covered Bridge, known locally as the Kissing Bridge, is a covered wooden bridge built in 1881 over the Grand River in Ontario.