2,617 articles
Halfweg Pumping Station
Stoomgemaal Halfweg is a steam-driven pumping station in Halfweg, the Netherlands, built in 1852 by the Hoogheemraadschap van Rijnland and now run as a steam-powered museum.
Hammersmith & City line
The Hammersmith & City line is a London Underground line running 25.5 km from Hammersmith to Barking, shown in pink on the Tube map since 1990.
Hampton Roads Bridge–Tunnel
The Hampton Roads Bridge–Tunnel (HRBT), also called the Hampton Roads Tunnel, is a 3.5-mile bridge-tunnel crossing Hampton Roads harbor in Virginia on Interstate 64, opened in 1957.
Hampton Roads Sanitation District
The Hampton Roads Sanitation District (HRSD) is a regional wastewater utility of Virginia, created by referendum in 1940 and serving 1.9 million people across 20 cities and counties.
Hangzhou Bay Bridge
Hangzhou Bay Bridge (杭州湾跨海大桥) is a 36 km six-lane cross-sea expressway bridge in eastern China linking Jiaxing and Ningbo, opened in 2008 as the world's longest cross-sea bridge.
Hapcheon Dam
Hapcheon Dam (합천댐), formally the Hapcheon Multi-purpose Dam, is a 96 m concrete gravity dam on the Hwang River in South Gyeongsang Province, South Korea, completed in 1988.
Harappan architecture
Harappan architecture, also known as Indus Valley Civilization architecture, is the Bronze Age building tradition of cities like Mohenjo-daro, with standardized bricks, cardinal-oriented streets, private wells, and covered drains.
Harbaqa Dam
The Harbaqa Dam (سد خربقة, also spelled Kharbaqa) is a large ancient gravity dam in the Syrian Desert that supplied the Umayyad palace of Qasr al-Hayr al-Gharbi.
Hard water
Hard water, also called water hardness, is water with high dissolved calcium and magnesium, picked up from soil and rock, which makes lathering harder and leaves scale in pipes.
Hardanger Bridge
The Hardanger Bridge (Hardangerbrua) is a suspension bridge on Norwegian National Road 13 across the Hardanger Fjord, opened in 2013 with the longest main span in Norway, 1,310 meters.
Hardy Cross method
The Hardy Cross method is an iterative technique for computing flows in closed-loop pipe networks, introduced in 1936 by Hardy Cross of the University of Illinois.
Harecastle Tunnel
Harecastle Tunnel is a canal tunnel on the Trent and Mersey Canal at Kidsgrove, Staffordshire, England, made up of two parallel tunnels built by James Brindley and Thomas Telford.
Hargreaves equation
The Hargreaves equation, usually called the Hargreaves–Samani equation, is an empirical equation published by George Hargreaves and Zohrab Samani in 1985 that estimates grass reference evapotranspiration from temperature data alone.
Haringvliet Sluices
The Haringvliet Sluices (Haringvlietsluizen) are 17 discharge openings in the Haringvliet Dam, part of the Dutch Delta Works, built between 1956 and 1970 to discharge Rhine and Meuse water to the sea.
Harl Preslar Aldrich Jr.
Harl Preslar Aldrich Jr. (1923–2014) was an American geotechnical engineer who cofounded Haley & Aldrich and was elected to the National Academy of Engineering in 1984.
Harris County Flood Control District
The Harris County Flood Control District is a special purpose district created by the Texas Legislature in 1937 to reduce flood damage in Harris County, the county containing Houston.
Harrisburg Covered Bridge
The Harrisburg Covered Bridge, also called East Fork Bridge, is a historic 1875 covered timber truss bridge over the East Fork of the Little Pigeon River near Sevierville, Tennessee.
Hartbeespoort Dam
Hartbeespoort Dam is an arch-type concrete dam on the Crocodile River in the Magaliesberg, completed in 1923 as the first irrigation scheme of the Union of South Africa.
Hartland Covered Bridge
The Hartland Covered Bridge crosses the Saint John River at Hartland, New Brunswick, and is the world's longest covered bridge, opened in 1901 and covered in the 1920s.
Haussmann's renovation of Paris
Haussmann's renovation of Paris, also known as Haussmannization, was a vast public works program commissioned by Napoleon III and directed by Georges-Eugène Haussmann between 1853 and 1870.
Haweswater Aqueduct
The Haweswater Aqueduct is a 110 km gravity-fed pipeline carrying drinking water from Haweswater Reservoir in the Lake District to Manchester, serving 2.5 million people.
Headrace and tailrace tunnels
Headrace and tailrace tunnels are hydropower tunnels conveying water from an intake to an underground powerhouse and back to the river, built as pressurized or free-flow tunnels.
Helensburgh Glow Worm Tunnel
The Helensburgh Glow Worm Tunnel, officially the Metropolitan Tunnel, is a disused 1888 railway tunnel at Helensburgh, Australia, home to a large glow worm colony.
Helical pile
A helical pile, also called a screw pile or helical anchor, is a steel deep foundation rotated into the ground like a screw, patented in 1833.
Hell Gate Bridge
The Hell Gate Bridge, also called the New York Connecting Railroad Bridge, is a steel through arch railroad bridge over the East River in New York City, opened in 1917.
Hells Canyon Dam
Hells Canyon Dam is a 330-foot concrete gravity dam on the Snake River on the Idaho–Oregon border, completed in 1967 and operated by Idaho Power.
Henry G. Schwartz Jr.
Henry G. Schwartz Jr., known as H. Gerard Schwartz Jr., is an American civil engineer elected to the National Academy of Engineering in 1997 for wastewater treatment systems.
Heritage designation of canals and waterways
Heritage designation of canals and waterways is the protection of historic canals through UK listing and scheduling, UNESCO World Heritage inscription, US historic districts, and Canadian permit rules.
Heritage documentation standards for engineering works
Heritage documentation standards for engineering works are the Secretary of the Interior's standards governing measured drawings, photographs, and histories for the Library of Congress's HABS/HAER collection.
Heritage-listed bridges in Australia
Heritage-listed bridges in Australia are spans entered on national, state, or territory heritage registers for cultural significance, including the convict-built Richmond Bridge of 1823 and the Sydney Harbour Bridge.