2,617 articles
Main cable
The main cable is the principal load-carrying element of a suspension bridge, running from anchorage to anchorage over the towers, with the deck suspended from it.
Main Outfall Drain
The Main Outfall Drain, also called the Third River, is a 565 km drainage canal in Iraq, completed in 1992 to carry saline water to the Arabian Gulf.
Maithon Dam (मैथन बांध)
Maithon Dam (मैथन बांध) is a multipurpose dam on the Barakar River in Jharkhand, India, completed in 1957 and operated by the Damodar Valley Corporation for flood control, irrigation, and hydropower.
Malpas Tunnel
The Malpas Tunnel (tunnel du Malpas) is a canal tunnel on the Canal du Midi in southern France, built in 1679 and 1680 under Pierre-Paul Riquet and regarded as the world's first navigation tunnel.
Malpaso Dam
Malpaso Dam, also known as Nezahualcóyotl Dam, is a 1,080 MW hydroelectric dam on the Grijalva River in Chiapas, Mexico, built from 1960 to 1964 as the first dam of the Grijalva cascade.
Mamluk Nile works at Cairo
The Mamluk Nile works at Cairo were the dams, canals, and Nilometer by which the Mamluk state regulated the Nile flood and set land taxes.
Managed retreat
Managed retreat is the deliberate relocation of people, infrastructure, or coastal defenses away from flood- and erosion-prone areas, letting the sea reclaim previously defended land.
Manantali Dam
The Manantali Dam is a rock-fill dam on the Bafing River in Mali, built jointly by Mali, Mauritania, and Senegal, with a 200 MW power station.
Manchester Ship Canal
The Manchester Ship Canal is a 36-mile inland ship canal in northwest England, opened by Queen Victoria in 1894, which turned landlocked Manchester into an ocean port and Britain's third busiest port.
Mangla Dam (منگلا ڈیم)
Mangla Dam (منگلا ڈیم) is an embankment dam on the Jhelum River in Pakistan, completed in 1967 under the Indus Waters Treaty to store irrigation water and generate about 1,000 MW.
Manhattan Bridge
The Manhattan Bridge is a suspension bridge completed in 1909 that crosses the East River between Lower Manhattan and Downtown Brooklyn, carrying vehicles, subway trains, pedestrians, and cyclists.
Manhole
A manhole, also known as a maintenance hole or utility hole, is an access point to an underground utility network, most commonly a sewer, used for inspection, maintenance, and ventilating sewage.
Manhole cover
A manhole cover, sometimes called a personhole cover, is a removable cast-iron plate set flush in the street over an access shaft to sewers and other underground utilities.
Maputo–Katembe Bridge
The Maputo–Katembe Bridge (Ponte Maputo–Katembe) is a suspension bridge over Maputo Bay connecting Mozambique's capital, Maputo, with Katembe; opened in 2018, it is the longest suspension bridge in Africa.
Marc Isambard Brunel
Marc Isambard Brunel, knighted in 1841, was a French-born engineer who settled in England, invented the tunnelling shield, and directed the Thames Tunnel, the first under a navigable river.
Marco Polo Bridge
Marco Polo Bridge, also called Lugou Bridge (卢沟桥), is an 11-arch stone bridge over the Yongding River southwest of Beijing, built by the Jin dynasty from 1189 to 1192.
Marib Dam (سد مأرب)
Marib Dam (سد مأرب, Sabaic ʿArim Marib), the great Sabaean earthen barrage on the Wadi Dhana at Ma'rib, Yemen; 650 m long, irrigating about 9,600 ha, repaired by Abraha in 547, and the sayl al-'arim of the Quran.
Marine outfall tunnels
A marine outfall tunnel is a sub-sea conduit carrying treated wastewater from a treatment plant beneath the seabed, releasing it far offshore through risers and multiport diffusers, as at Boston and Sydney.
Marine railway
A marine railway is a dry docking installation that hauls boats out of the water on a wheeled cradle for repair, known in Britain as a slipway.
Marmaray
Marmaray is a 76.3 km commuter railway in Istanbul linking Halkalı in Europe with Gebze in Asia through a tunnel beneath the Bosphorus, opened in 2013.
Marmaray Tunnel
The Marmaray Tunnel is a railway tunnel under the Bosphorus Strait in Istanbul, Turkey, whose immersed tube section connects the European and Asian sides, opened in 2013.
Marshall mix design method
The Marshall mix design method is an empirical laboratory procedure that determines the optimum asphalt binder content for hot mix asphalt through stability and flow testing.
Maryann T. Phipps
Maryann T. Phipps is an American structural engineer, founding principal of Estructure, Inc. in Oakland, California, elected to the National Academy of Engineering in 2022 for seismic engineering leadership.
Masonry dam
A masonry dam is a dam whose main structure is coursed stone or brick set in mortar, built as a gravity, buttress, or arch design.
Mass concrete
Mass concrete is any concrete volume where heat of hydration cannot dissipate quickly, raising temperature enough to risk cracking; the ACI sets no size threshold.
Massachusetts Water Resources Authority
The Massachusetts Water Resources Authority (MWRA) is a Massachusetts public authority providing wholesale drinking water and sewer services to 61 eastern Massachusetts communities since 1985.
MasTec
MasTec, Inc. is a North American infrastructure engineering and construction company headquartered in Coral Gables, Florida, formed in 1994 and listed on the NYSE, with 2024 revenue of $12.3 billion.
Matilija Dam removal project
The Matilija Dam removal project is a planned effort to remove the obsolete 1947 Matilija Dam in Ventura County, California, reopening spawning habitat for endangered Southern California steelhead.
Matthys P. Levy
Matthys P. Levy is a Swiss-born American structural engineer, founding principal of Weidlinger Associates, known for the Georgia Dome's tensegrity cable roof and the World Trade Center collapse investigation.
Maya corbel vault
The Maya corbel vault, also called the corbeled arch or false arch, is a stone roofing method of overlapping courses, used from 600 BC to 1500 AD.