2,617 articles
Holland Tunnel
The Holland Tunnel is a twin-tube vehicular tunnel under the Hudson River between Jersey City, New Jersey, and Lower Manhattan, opened in 1927 as the first designed for automotive traffic.
Holyhead Breakwater
The Holyhead Breakwater is a Victorian stone breakwater about 2.4 km long at Holyhead, Anglesey, Wales, built between 1848 and 1873 as a harbor of refuge.
Hondsbosse and Pettemer sea defences
The Hondsbosse and Pettemer sea defenses are a sea dike on the North Holland coast between Petten and Camperduin, replaced by sandy dunes in 2015.
Hong Kong–Zhuhai–Macau Bridge (港珠澳大桥)
The Hong Kong–Zhuhai–Macau Bridge (港珠澳大桥) is a 55 km bridge–tunnel–island sea crossing opened 24 October 2018, the world's longest, linking Hong Kong, Zhuhai and Macao with a 6.7 km immersed tunnel and 120-year design life.
Hood Canal Bridge
The Hood Canal Bridge, officially the William A. Bugge Bridge, is a floating drawbridge carrying State Route 104 across the northern outlet of Hood Canal in Washington State.
Hoogheemraadschap van Rijnland
The Hoogheemraadschap van Rijnland is a Dutch regional water authority managing flood protection, water levels, and water quality around Leiden and Haarlem, chartered by Count Willem II in 1255.
Hoosac Tunnel
The Hoosac Tunnel, also called the Hoosac Railroad Tunnel, is a 4.75-mile railroad tunnel through the Hoosac Range in Massachusetts, built between 1851 and 1875.
Hoover Dam
Hoover Dam, also known as Boulder Dam, is a 726-foot concrete dam on the Colorado River between Nevada and Arizona, completed in 1936, impounding Lake Mead and generating hydroelectric power.
Horsetooth Reservoir
Horsetooth Reservoir is a reservoir in the foothills west of Fort Collins, Colorado, formed by four dams in 1949 and serving as a major storage point of the Colorado-Big Thompson Project.
Hot Metal Bridge
The Hot Metal Bridge is a pair of truss bridges crossing the Monongahela River in Pittsburgh, built to carry molten iron for Jones & Laughlin Steel.
Houtribdijk
The Houtribdijk, also called the Markerwaarddijk, is a 26 km dam in the Netherlands between Enkhuizen and Lelystad that separates the IJsselmeer from the Markermeer and carries the N307 road.
Howe truss
The Howe truss is a bridge truss patented by William Howe in 1840, combining timber diagonals in compression with wrought iron vertical rods in tension.
Howrah Bridge
Howrah Bridge (হাওড়া ব্রিজ), officially Rabindra Setu, is a steel cantilever bridge over the Hooghly River linking Howrah and Kolkata in West Bengal, opened in 1943 and carrying about 100,000 vehicles daily.
Huajiang Canyon Bridge (花江峡谷大桥)
The Huajiang Canyon Bridge, also called the Huajiang Grand Canyon Bridge (花江峡谷大桥), is a suspension bridge in Guizhou, China, and the world's highest bridge, with its deck 625 m above the Beipan River.
Huerta of Valencia and Murcia
The Huerta of Valencia and Murcia are two historic irrigated plains in Spain, governed since the Middle Ages by customary water courts recognized by UNESCO.
Huguenot Tunnel
The Huguenot Tunnel is a 3.9 km toll road tunnel on the N1 in South Africa's Western Cape, opened in 1988 and the longest road tunnel in the country.
Humber Bridge
The Humber Bridge is a road suspension bridge across the Humber Estuary in northern England, linking Hessle with Barton-upon-Humber. Opened in 1981, its 1,410-meter main span was the world's longest until 1998.
Humen Bridge
Humen Bridge (虎门大桥) is a six-lane suspension bridge crossing the Pearl River estuary in Guangdong, China, linking Guangzhou with Dongguan. Opened in 1997, it carries the G9411 expressway.
Hungry Horse Dam
Hungry Horse Dam is a 564-foot concrete arch dam on the South Fork Flathead River in Montana, built by the Bureau of Reclamation from 1948 to 1953.
Hussain Sagar
Hussain Sagar, also known as Tank Bund, is a man-made lake between Hyderabad and Secunderabad, India, built in 1562 and named after the Sufi saint Hussain Shah Wali.
Hveem mix design method
The Hveem mix design method is an empirical procedure for designing asphalt paving mixtures, developed by Francis N. Hveem in California in the late 1920s.
Hyderabad–Amaravati Greenfield Expressway
The Hyderabad–Amaravati Greenfield Expressway is a proposed six-lane, access-controlled expressway linking Hyderabad with Amaravati on a new alignment, planned near 298 km and still at the DPR stage in late 2025.
Hydraulic engineering
Hydraulic engineering, also known as hydrotechnics or hydroengineering, is the branch of civil engineering concerned with water flow and the design of dams, canals, levees, and drainage systems.
Hydroelectricity in Turkey
Hydroelectricity in Turkey, also called hydropower in Turkey, is generated at more than 770 plants with about 32,200 MW installed capacity, the country's largest power resource.
Hydropower Sustainability Standard
The Hydropower Sustainability Standard (HSS) is a global certification scheme defining environmental, social, governance, and climate performance requirements for hydropower projects, launched in September 2021 and managed by the Hydropower Sustainability Alliance.
Hyundai Engineering & Construction
Hyundai Engineering & Construction (현대건설), commonly Hyundai E&C, is a South Korean construction firm founded in 1947 and owned by Hyundai Motor Group, known for overseas projects in 62 countries.
I-35W Mississippi River bridge
The I-35W Mississippi River bridge was an eight-lane steel deck truss bridge in Minneapolis, opened in 1967, that collapsed on August 1, 2007, killing 13 and injuring 145.
I-35W Mississippi River bridge collapse
The I-35W Mississippi River bridge collapse was the August 1, 2007, failure of an eight-lane Interstate 35W bridge in Minneapolis, Minnesota, that killed 13 people and injured 145.
I-35W Saint Anthony Falls Bridge
The I-35W Saint Anthony Falls Bridge is a ten-lane concrete bridge carrying Interstate 35W over the Mississippi River in Minneapolis, opened September 2008 to replace the bridge that collapsed in 2007, killing 13 people.
I-395 Signature Bridge
The I-395 Signature Bridge, formally the Fountain Bridge, is a six-arch concrete bridge carrying Interstate 395 through downtown Miami, set to become the largest concrete segmental arch bridge in the United States.