Architecture, buildings, and civil works

Interstate Bridge

The Interstate Bridge is a pair of vertical lift bridges carrying Interstate 5 across the Columbia River between Vancouver, Washington, and Portland, Oregon, opened in 1917 and 1958.

Interstate Waste Services (IWS)

Interstate Waste Services is a privately held, vertically integrated solid waste company headquartered in Teaneck, New Jersey, serving greater New York City, New Jersey, and Southwestern Connecticut since 2024.

Intracoastal Waterway

The Intracoastal Waterway (ICW) is a system of protected inshore channels along the Atlantic and Gulf coasts of the United States, from New Jersey to Texas.

Intuit Dome

Intuit Dome, formerly the Inglewood Basketball and Entertainment Center, is an arena in Inglewood, California, opened in 2024 as the privately financed $2 billion home of the Los Angeles Clippers.

Inveraray Castle

Inveraray Castle, seat of the Dukes of Argyll and Clan Campbell on Loch Fyne, Scotland: Gothic Revival house begun 1744–46 by Roger Morris and the Adams, completed by Robert Mylne, rebuilt by Salvin after the 1877 fire, Category A listed visitor attraction.

Investigations of levee failures during Hurricane Katrina

The investigations of levee failures during Hurricane Katrina were forensic engineering studies from 2005 through 2009 that determined why New Orleans' protection system breached in 2005.

Oct 22, 2026

Ion Mincu

Ion Mincu (1852–1912) was a Romanian architect, engineer, professor, and politician credited as founder of the Neo-Romanian style; his works include Casa Lahovary and the Central Girls' School in Bucharest.

Ionic order

The Ionic order, also called the Ionian order, is one of the three principal classical Greek architectural orders, defined by columns crowned with scroll-like volutes, originating in Asia Minor in the mid-6th century BC.

Iowa State Capitol

The Iowa State Capitol in Des Moines, built between 1871 and 1886, houses the Iowa General Assembly and is the only five-domed capitol in the United States.

Ir.D.F. Woudagemaal (D.F. Wouda Steam Pumping Station)

Ir.D.F. Woudagemaal (D.F. Wouda Steam Pumping Station) at Lemmer, Friesland, is the largest steam pumping station ever built, opened in 1920, UNESCO-listed since 1998, and still operated by Wetterskip Fryslân to pump excess Frisian water into the IJsselmeer.

Irache

Irache, in Basque Iratxe, is a former Benedictine monastery in Ayegui, Navarre, Spain, documented since 958 and on the Camino de Santiago; it later housed Navarre's first university.

Iran Mall

Iran Mall (ایران مال) is a huge shopping and cultural complex in northwest Tehran, opened in 2018 and widely cited as the world's largest shopping center by total area.

Irish Water

Irish Water, known as Uisce Éireann since 31 December 2022, is Ireland's national regulated water utility, created in 2013 to combine 31 local authorities' water and wastewater services.

Iron Gate Dam (California)

Iron Gate Dam was an earth-fill hydroelectric dam on the Klamath River in Siskiyou County, California, removed in 2024 in the largest dam removal in US history.

Iron Gate I Hydroelectric Power Station

Iron Gate I Hydroelectric Power Station, known in Romanian as Porțile de Fier I, is a dam and hydroelectric plant on the Danube between Romania and Serbia.

Iron Gate II Hydroelectric Power Station

Iron Gate II Hydroelectric Power Station, known in Romanian as Porțile de Fier II, is a joint Romanian-Serbian dam on the Danube River, built from 1977 and operating from the mid-1980s.

Iron pillar of Delhi

The Iron pillar of Delhi is a wrought-iron pillar over 7 meters tall and 7 tonnes heavy in the Qutb complex, famed for resisting rust for some 1,600 years.

Irrigation

Irrigation, also called agricultural irrigation, is the artificial application of water to crops where rainfall falls short, by surface, sprinkler, or drip methods, practiced since ancient times.

Irrigation canal

An irrigation canal is an open artificial channel that carries water from a source such as a river or reservoir to agricultural fields, typically with a trapezoidal cross-section.

Irrigation ditch

Irrigation ditch, or acequia (from Arabic as-sāqiya), an artificial channel carrying water to cropland; community-governed acequias of Spain and New Mexico, types, hydrology, and ancient ditch law.

Irrigation in India

Irrigation in India is the supply of water to cropland through canals, tanks, and wells, with groundwater the largest source at about 60% of irrigated area and canals second at 25%.

Irrigation sprinkler

An irrigation sprinkler, also called a lawn sprinkler, is a device that sprays water into the air so it falls like rain onto crops or lawns.

Irrigation system

An irrigation system is an engineered assembly that delivers water from a river, aquifer, or reservoir to crops in a controlled way, and accounts for roughly 70 percent of human freshwater withdrawals.

IS 1893

IS 1893 is the Indian Standard, Criteria for Earthquake Resistant Design of Structures, published by the Bureau of Indian Standards, first issued in 1962, with the 2016 edition in force.

IS 456

IS 456, current edition IS 456:2000, is the Indian Standard code of practice for plain and reinforced concrete and the principal reference for reinforced concrete design in India.

IS 800

IS 800 is the Indian Standard code of practice for general construction in steel, published by the Bureau of Indian Standards as the basic code for structural steel design in India.

Isambard Kingdom Brunel

Isambard Kingdom Brunel (1806–1859) was an English civil engineer, son of Marc Brunel, who built the Great Western Railway, the Clifton Suspension Bridge, and the pioneering steamships Great Western, Great Britain, and Great Eastern.

Ise Grand Shrine

Ise Grand Shrine (伊勢神宮, Ise Jingū) is a complex of 125 Shinto shrines in Ise, Japan, dedicated to the sun goddess Amaterasu and rebuilt every 20 years.

Islamic architecture

Islamic architecture, also called Muslim architecture or Architecture in Islam, is the architecture of cultures where Islam dominates, defined by visual style and spanning 14 centuries.