5,208 articles
Legacy Way
Legacy Way, formerly the Northern Link Tunnel, is a 4.6-kilometer twin two-lane toll tunnel in Brisbane, Australia, opened in 2015 and linking the Western Freeway to the Inner City Bypass.
Legends Tower
Legends Tower is a proposed 1,907-foot, 134-story skyscraper in Oklahoma City's Bricktown neighborhood that, if built, would be the tallest building in the United States and North America.
Legging (canals)
Legging is a way of moving a boat through a canal tunnel without a towpath: a person lies on their back and pushes against the tunnel roof or walls with their legs.
Legislative chamber
A legislative chamber is the room where a parliament or legislature meets to debate and vote, with its seating shape seen as influencing the politics within.
Lekki Deep Sea Port
The Lekki Deep Sea Port is Nigeria's first deep seaport and first fully automated port, a deep-water container port at Ibeju-Lekki in Lagos State commissioned in 2023.
Lelio H. Mejia
Lelio H. Mejia is an American geotechnical earthquake engineer specializing in the seismic safety of dams and levees, elected to the National Academy of Engineering in 2020.
Leonard P. Zakim Bunker Hill Memorial Bridge
The Leonard P. Zakim Bunker Hill Memorial Bridge, often called the Zakim Bridge, is a ten-lane cable-stayed bridge carrying I-93 across the Charles River in Boston, opened in 2003.
Leonardo Zeevaert Wiechers
Leonardo Zeevaert Wiechers (1914–2010) was a Mexican geotechnical engineer who designed foundations for Mexico City's Latinoamericana Tower and joined the US National Academy of Engineering.
Les Invalides
Les Invalides, formally the Hôtel national des Invalides, is a Paris complex founded by Louis XIV in 1670 for wounded soldiers, now holding Napoleon's tomb and the Army Museum.
Lesotho Highlands Water Project
The Lesotho Highlands Water Project (LHWP) is a bi-national scheme of dams and tunnels supplying Lesotho highlands water to Gauteng, South Africa, under a 1986 treaty.
Levee
A levee, also known as a stopbank or river dike, is an earthen embankment or concrete floodwall built alongside a watercourse to reduce flood risk to part of the floodplain.
Levee breach
A levee breach, also called a dike breach, is the failure of a flood-control embankment that lets river or sea water flood the protected area behind it.
Levelized cost of water
The levelized cost of water (LCOW) is an economic metric expressing the lifetime cost of a water production system per unit volume, usually dollars per cubic meter.
Levelling (surveying)
Levelling is a surveying method that measures height differences between points using a level establishing a horizontal line of sight and a graduated staff read against it.
Lever House
Lever House is a 1952 office skyscraper at 390 Park Avenue in Midtown Manhattan, designed by Gordon Bunshaft of Skidmore, Owings & Merrill as Lever Brothers' American headquarters.
Lewes Priory
Lewes Priory, the Priory of St Pancras, was a Cluniac monastery in Lewes, Sussex, founded by William de Warenne and Gundrada between 1078 and 1082.
Lewiston–Queenston Bridge
The Lewiston–Queenston Bridge is a steel deck-arch road bridge over the Niagara River between Lewiston, New York and Queenston, Ontario, opened in 1962 as the northernmost crossing.
Li Bing (李冰) (Qin)
Li Bing (李冰) was a Qin administrator and water engineer who, as governor of Shu Prefecture in Sichuan, built the damless Dujiangyan irrigation system around 256 BC.
Libby Dam
Libby Dam is a 422-foot concrete gravity dam on the Kootenai River in northwestern Montana, completed in 1975 and operated by the U.S. Army Corps of Engineers.
Liberty Bell
The Liberty Bell, also called the State House Bell, is a bronze bell cast in 1753 for the Pennsylvania State House in Philadelphia, known for its large crack.
Lickleyhead Castle
Lickleyhead Castle is a 16th-century L-plan laird's house near Auchleven in Aberdeenshire, Scotland, remodeled in 1629 for John Forbes and now a Category A listed holiday let.
LifeStraw
LifeStraw is a brand of portable water filters using hollow fiber membrane technology to remove bacteria, parasites, and microplastics, first sold by Denmark-based Vestergaard in 2005.
Light steel framing
Light steel framing, also known as light gauge or cold-formed steel framing, is a building system of thin galvanized steel C and Z sections for walls, floors, and roofs, widely used in residential and modular construction.
Light well
A light well is a vertical shaft within or beside a building, open to the sky or skylight-roofed, that delivers daylight to interior spaces windows cannot reach.
Lighthouse
A lighthouse is a tower carrying a light that aids maritime navigation, warning mariners of coasts, reefs, and rocks; mariners have used lights for over 2,000 years.
Lighthouse automation
Lighthouse automation is the replacement of resident lighthouse keepers with self-operating equipment and periodic maintenance visits, carried out through national programs from the 1960s through the 1990s.
Lighthouse of Alexandria (منارة الإسكندرية)
The Lighthouse of Alexandria, also called the Pharos of Alexandria, was a lighthouse built on the island of Pharos in Egypt around 297 BCE, one of the Seven Wonders of the Ancient World.
Lightvessel
A lightvessel, also called a lightship or lightboat, is a ship anchored at sea to mark hazards as an aid to navigation where a lighthouse cannot be built.
Lightweight aggregate concrete
Lightweight aggregate concrete is concrete made with porous, low-density aggregate, giving a density of roughly 70 to 120 lb/ft³ versus about 145 for normal concrete.
Lillian C. Borrone
Lillian C. Borrone (born 1945) is an American civil engineer who in 1988 became the first woman in the world to head a major port.