2,617 articles
Lake Powell
Lake Powell, also called Powell Reservoir, is a reservoir on the Colorado River behind Glen Canyon Dam in Utah and Arizona, the second-largest in the United States.
Lake Somerset
Lake Somerset is the name of several reservoirs, most notably a water supply and flood mitigation reservoir on the Brisbane River in Queensland, Australia, completed in 1951.
Lake Travis
Lake Travis is a reservoir on the Colorado River in Central Texas, formed by Mansfield Dam northwest of Austin; it is the only Highland Lake with dedicated flood storage.
Lake Volta
Lake Volta, also called Volta Lake, is the reservoir of Ghana's Akosombo Dam and the largest man-made lake in the world by surface area, covering 8,502 square kilometers.
Lake Washington Ship Canal
The Lake Washington Ship Canal is an eight-mile waterway in Seattle connecting Lake Washington and Lake Union to Puget Sound, built by the U.S. Army Corps of Engineers from 1911 to 1917.
Lake Wivenhoe
Lake Wivenhoe is the reservoir formed by Wivenhoe Dam, completed in 1984, on the Brisbane River in Queensland, Australia; it supplies more than half the region's drinking water.
Lamu Port
Lamu Port is a deep-water seaport at Manda Bay in Lamu County, Kenya, and the maritime anchor of the LAPSSET Corridor linking Kenya, South Sudan, and Ethiopia.
Landfill gas collection
Landfill gas collection is the extraction of methane-rich gas from decomposing landfill waste through wells and piping, so it can be flared or used as fuel.
Landfill leachate
Landfill leachate is the liquid that has passed through solid waste in a landfill, carrying organic matter, ammonia, heavy metals, and PFAS that must be collected and treated.
Landwasser Viaduct
The Landwasser Viaduct (Landwasserviadukt) is a 65-meter-high masonry railway viaduct near Filisur in Graubünden, Switzerland, built in 1902 on the Rhaetian Railway's UNESCO-listed Albula Line.
Langkawi Sky Bridge
The Langkawi Sky Bridge (Malay: Jambatan Udara Langkawi) is a 125-meter curved pedestrian cable-stayed bridge on Gunung Mat Cincang in Langkawi, Malaysia, opened in 2005 and hanging about 660 meters above sea level.
Langwieser Viaduct
The Langwieser Viaduct is a single-track reinforced concrete railway viaduct near Langwies in Graubünden, Switzerland, carrying the Rhaetian Railway's Chur–Arosa line across the Plessur valley.
Lateral-torsional buckling
Lateral-torsional buckling is a beam instability in which the compression flange buckles sideways and the beam twists, reducing strength below its cross-sectional capacity in steel design.
Launching gantry
A launching gantry, also called a launching girder or launcher gantry, is a self-propelled overhead steel truss that erects precast segmental bridges without ground cranes.
Lawrence G. Griffis
Lawrence G. Griffis, known as Larry Griffis, is an American structural engineer at Walter P Moore in Houston, elected to the National Academy of Engineering in 2003.
Leachate
Leachate is the contaminated liquid that has passed through or emerged from solid waste, generated in landfills when water infiltrates waste and picks up pollutants.
Lead contamination in Washington, D.C., drinking water
Lead contamination in Washington, D.C., drinking water was a crisis from 2001 to 2004, when a switch to chloramine disinfection corroded lead service lines and raised lead levels fivefold.
Lead rubber bearing
A lead rubber bearing (LRB) is a seismic isolation device with a lead core, developed in New Zealand in the early 1970s by W. H. Robinson.
Leeds and Liverpool Canal
The Leeds and Liverpool Canal is a 127-mile broad-beam canal in northern England linking Leeds with Liverpool across the Pennines, authorised in 1770 and completed in 1816.
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.
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.
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.
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.
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.