2,617 articles
Drinking Water Inspectorate
The Drinking Water Inspectorate (DWI) is the drinking water quality regulator for public water supplies in England and Wales, formed in 1990 and employing about 70 staff.
Drinking water quality in the United States
Drinking water quality in the United States is governed by the Safe Drinking Water Act, under which the EPA sets enforceable standards for about 147,000 public water systems.
Drinking water quality standards
Drinking water quality standards define how clean drinking water must be: legally enforceable contaminant limits, treatment rules, and monitoring set by national authorities, with WHO guidelines as the international reference.
Drinking water supply
Drinking water supply: systems of source, treatment, storage, and distribution delivering safe water. 74% of people used safely managed services in 2024; 2.1 billion still lack them, per WHO/UNICEF JMP.
Drinking water treatment
Drinking water treatment: processes (coagulation, filtration, disinfection, GAC, ion exchange, reverse osmosis) that make raw water safe to drink; US routine disinfection began in Jersey City, 1908, cutting typhoid from 100 to 0.1 cases per 100,000.
Driven pile
A driven pile is a preformed foundation element, typically steel, precast concrete, or timber, forced into the ground by an impact hammer or vibratory driver.
Dry stack tailings
Dry stack tailings, also called filtered tailings, are mine tailings dewatered to a moist, transportable cake and compacted into stable, unsaturated stacks that need no retaining dam or tailings pond.
Dry well
A dry well, also called a soak well or soak pit, is an underground structure that disposes of stormwater runoff by infiltrating it into the soil.
Dudley Tunnel
Dudley Tunnel is a canal tunnel in Dudley, England, begun in 1775 to serve limestone mines and now the second longest navigable canal tunnel in the UK.
Dujiangyan (都江堰)
Dujiangyan (都江堰), also known as the Dujiangyan Irrigation System, is an ancient damless irrigation system in Sichuan, China, begun around 256 BC by Li Bing and still in use.
Dul Hasti Hydroelectric Plant
Dul Hasti Hydroelectric Plant, also written Dulhasti, is a 390 MW run-of-the-river power station on the Chenab River in Kishtwar, Jammu and Kashmir, India, commissioned in 2007.
Dumbarton Bridge (California)
The Dumbarton Bridge is a six-lane toll bridge carrying State Route 84 across southern San Francisco Bay between Newark and East Palo Alto, opened in October 1982.
DuSable Bridge
The DuSable Bridge, long known as the Michigan Avenue Bridge, is a double-deck bascule bridge carrying Michigan Avenue over the Chicago River, opened in 1920.
Düsseldorf Stadtbahn
The Düsseldorf Stadtbahn is Düsseldorf's light rail system, eleven Rheinbahn-operated lines on about 6.9 km of tunnel through the center, some reaching Neuss, Krefeld, and Duisburg.
Dutch Dike reinforcement programmes (HWBP)
The Dutch Dike reinforcement programs, or Hoogwaterbeschermingsprogramma (HWBP), is the national program launched in 2014 to bring all Dutch primary flood defenses up to statutory safety standards by 2050.
Dworshak Dam
Dworshak Dam is a 717-foot-high concrete gravity dam on the North Fork Clearwater River at Ahsahka, Idaho, the third tallest dam in the United States.
Dworshak National Fish Hatchery
Dworshak National Fish Hatchery is a federal salmon and steelhead hatchery near Ahsahka, Idaho, built by the U.S. Army Corps of Engineers in 1969 to compensate for habitat blocked by Dworshak Dam.
Dynamic compaction
Dynamic compaction is a ground improvement method that densifies loose soils and fills by repeatedly dropping heavy tampers from a crane, used on embankments, landfills, reclaimed land, and liquefaction-prone sands.
Dynamic modulus (asphalt mixtures)
The dynamic modulus of an asphalt mixture, written |E|, measures asphalt concrete stiffness across temperatures and loading rates, and is a required stiffness input to the MEPDG.
E. Montford Fucik
E. Montford (Ed) Fucik (1914–2010) was an American civil engineer who led Harza Engineering Company as president and chairman and was elected to the National Academy of Engineering in 1974.
Eads Bridge
The Eads Bridge is a three-span steel arch bridge carrying road and rail across the Mississippi between St. Louis, Missouri, and East St. Louis, Illinois, completed in 1874.
Early road and mountain-pass tunnels
Early road and mountain-pass tunnels are hand-cut road tunnels such as the Buco di Viso of 1478, the Urnerloch of 1708, and Reigate Tunnel of 1823.
Earth pressure balance shield
An earth pressure balance (EPB) shield, or EPB shield, is a tunnelling machine that supports the tunnel face with its own excavated soil, conditioned with additives and pressurized.
Earth pressure balance tunnel boring machine
An earth pressure balance (EPB) tunnel boring machine supports the tunnel face with pressurized excavated soil, widely used in urban soft-ground tunnelling to limit settlement.
Earth-fill dam
An earth-fill dam is an embankment dam built by compacting successive layers of earth, with an impervious central core and more permeable material on either side.
Earthquake engineering
Earthquake engineering, also called seismic engineering, is the civil engineering field covering seismic design of buildings and bridges, retrofit of existing structures, and ground motion hazard evaluation.
East Bay Municipal Utility District
The East Bay Municipal Utility District (EBMUD) is a publicly owned utility formed in 1923, serving 1.5 million water customers in the East Bay from the Mokelumne River.
East Flood Canal
The East Flood Canal (Banjir Kanal Timur) is a 23.5-kilometer flood-control canal in eastern and northern Jakarta, Indonesia, built to divert floodwater from rivers east of the city to the Java Sea.
East Side Access
East Side Access, the MTA's subway extension for the Long Island Rail Road, connects Queens to the new Grand Central Madison terminal beneath Grand Central, opened in 2023.
East Side Big Pipe
The East Side Big Pipe is a combined sewer overflow storage tunnel on Portland, Oregon's east riverbank, finished in 2011 as the city's largest sewer project.