5,208 articles
Outlet works
Outlet works are the structures and equipment in a dam through which controlled releases of reservoir water are made, via gates, conduits, and valves, distinct from spillways.
Output-based aid
Output-based aid, also called performance-based aid, is a results-based financing approach in which subsidies are paid to service providers only after verified delivery of services to poor households, mainly in developing countries.
Over Bridge
Over Bridge is a single-arch stone bridge over the River Severn at Gloucester, England, built between 1825 and 1830 to a design by Thomas Telford.
Overflow spillway
An overflow spillway, or ogee spillway, passes flood water over the top of a dam on a crest shaped to match a falling water sheet.
Overstrength
Overstrength is the ratio of a structure's actual lateral strength to the strength required by seismic design provisions, central to earthquake engineering because codes rely on reserve strength to prevent collapse.
Overtopping
Overtopping, or wave overtopping, is the passage of water from wave run-up over the crest of a seawall, dike, or breakwater, which can flood the hinterland and endanger people.
Overtopping protection
Overtopping protection is the armoring of a dam, most often an earthen embankment, so floodwater flowing over its crest does not erode it and cause a breach.
Overtoun Bridge
Overtoun Bridge, called the dog suicide bridge, is a road bridge over the Overtoun Burn near Dumbarton, Scotland, known for reports of dogs falling from its parapet.
Oxford House
Oxford House is an arts and community center in Bethnal Green, London, founded in 1884 as a university settlement where Oxford graduates lived and worked among the poor of East London.
Oxidation ditch
An oxidation ditch is a modified activated-sludge process that treats wastewater in a racetrack-shaped loop, using rotating aerators and long solids retention times to remove organic matter and nutrients.
Ozonation
Ozonation is a water treatment process that dissolves ozone into water to inactivate pathogens and oxidize contaminants; used in drinking water since 1893, notably at Nice, France.
Package treatment plant
A package treatment plant is a pre-manufactured wastewater treatment facility, built in a factory and shipped to a site, typically serving small communities or individual properties with flows between 0.01 and 0.25 MGD.
Padma Bridge (পদ্মা সেতু)
The Padma Bridge (পদ্মা সেতু), formally the Padma Multipurpose Bridge, is a 6.15 km road and rail bridge over the Padma River in Bangladesh, opened in 2022.
Padmanabhapuram Palace
Padmanabhapuram Palace, also known as Kalkulam Palace, is a 16th-century wooden palace complex at Thuckalay, Tamil Nadu, that served as the capital seat of the Travancore kingdom.
Padmanabhaswamy Temple
Sree Padmanabhaswamy Temple is a Hindu temple dedicated to Vishnu in Thiruvananthapuram, Kerala, rebuilt in granite by Marthanda Varma between 1729 and 1733, and among the richest places of worship in the world.
Pagoda
A pagoda is a tiered tower associated with Buddhist temple complexes in East and Southeast Asia, built of stone, brick, or wood to house sacred relics.
Paimio Sanatorium
Paimio Sanatorium (Paimion parantola) is a former tuberculosis sanatorium in Paimio, Southwest Finland, designed by Alvar and Aino Aalto, completed in 1933, and regarded as a landmark of functionalist architecture.
Painted ladies
Painted ladies are Victorian and Edwardian houses repainted in three or more colors, a term coined in San Francisco in 1978 and now used across the United States.
Painter and decorator
A painter and decorator, also known as a house painter, is a construction tradesperson who applies paint, wallpaper, and finishes to buildings, ranging from homes and offices to bridges.
Pakistan Engineering Council
The Pakistan Engineering Council (PEC) is the statutory body that regulates engineering in Pakistan, licensing engineers and accrediting engineering programs under the PEC Act 1976 from Islamabad.
Palace
Palace: a grand residence of a ruler or prelate serving court, ceremony, and government, distinct from a fortified castle. Key examples include the Forbidden City (1406–1420, ~10,000 rooms) and Baroque Versailles, seat of Louis XIV's court from 1682.
Palace Bridge
Palace Bridge, also known as Dvortsoviy Most, is a bascule bridge in Saint Petersburg that crosses the Neva River, linking the Winter Palace with Vasilievsky Island.
Palace of Ajuda
The Palace of Ajuda (Palácio Nacional da Ajuda) is a neoclassical former royal palace in Lisbon, Portugal, begun in 1796 and now a national museum of decorative arts.
Palace of Culture and Science
The Palace of Culture and Science (Pałac Kultury i Nauki) is a Stalinist-era skyscraper in central Warsaw, built 1952–1955 as a gift from the Soviet Union.
Palace of Facets
Palace of Facets (Granovitaya Palata, Грановитая Палата), Moscow Kremlin ceremonial hall built 1487–1491 by Marco Ruffo and Pietro Antonio Solari; 495 sq m one-pillar vaulted throne hall, diamond-rusticated facade, now a Russian presidential representative hall.
Palace of Fine Arts
The Palace of Fine Arts is a rotunda, colonnade, and lagoon in San Francisco, built for the 1915 Panama-Pacific International Exposition and designed by Bernard Maybeck.
Palace of Fontainebleau
The Palace of Fontainebleau (Château de Fontainebleau) is a royal residence at Fontainebleau, France, rebuilt in Renaissance style by François I from 1528 and used by French kings until 1870.
Palace of Placentia
The Palace of Placentia, better known as Greenwich Palace, was a Tudor royal residence at Greenwich in London, the birthplace of Henry VIII and Elizabeth I.
Palace of the Parliament
The Palace of the Parliament (Palatul Parlamentului), also known as Casa Poporului, is the seat of Romania's parliament in Bucharest, built under Ceaușescu from 1984.
Palace of the Parliament, Bucharest
The Palace of the Parliament (Palatul Parlamentului), also known as the People's House, is a monumental building in Bucharest that houses both chambers of Romania's Parliament.