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Tokuyama Dam
Tokuyama Dam (徳山ダム) is a rockfill dam on the Ibi River in Ibigawa, Gifu Prefecture, Japan. At 161 m high, it has the largest reservoir capacity and dam body volume of any dam in Japan.
Tokyo Bay Aqua-Line
The Tokyo Bay Aqua-Line (東京湾アクアライン) is a 15.1 km toll road across Tokyo Bay linking Kawasaki and Kisarazu, combining a 9.6 km undersea tunnel with a bridge, opened in 1997.
Toledo Bend Reservoir
Toledo Bend Reservoir is an impoundment of the Sabine River on the Texas–Louisiana border, formed by a dam completed in 1969 and used for water supply, hydroelectric power, and recreation.
Toll bridge
A toll bridge is a bridge whose users pay a fee to cross, typically to repay construction costs, with tolls often removed once the debt is paid.
Tomis (river)
Tomis (river), the ancient name of the Bahr Yusuf (Bahr Yousef), Egypt's meandering Nile side-channel from Dayrut to the Fayum and Lake Qarun; a 313 km irrigation canal serving four governorates with about 5 billion m³ of Nile water yearly.
Top-down cut-and-cover construction
Top-down cut-and-cover construction, known in the industry as the Milan method, builds an underground box from the top down: walls and columns first, then the roof, then excavation beneath it.
Total dissolved solids
Total dissolved solids (TDS) is the mass of dissolved salts and organic matter in water, reported in mg/L as a measure of how mineralized the water is.
Total suspended solids
Total suspended solids (TSS) is the mass of particles in water retained on a filter and dried to constant weight, a core wastewater and surface-water quality parameter reported in mg/L.
Tower Bridge
Tower Bridge is a combined bascule and suspension bridge across the River Thames in London, built between 1886 and 1894 and still legally required to open for river traffic.
Tower Subway
The Tower Subway is a tube tunnel under the Thames in London, opened in 1870 as the world's first tube railway and today carrying water mains and cables.
Traditional water sources of Persian antiquity
The traditional water sources of Persian antiquity, above all the qanat, or kārīz, supplied the Iranian plateau's settlements and agriculture from the first millennium BC onward.
Traffic bollard
A traffic bollard is a short vertical post about 900 to 1200 mm tall that controls vehicle movement, protects buildings and pedestrians, and ranges from fixed posts to retractable, crash-rated designs.
Traité de stéréotomie
Traité de stéréotomie is a three-volume 1737–1739 treatise on cutting stone and timber for vaults by the French military engineer Amédée-François Frézier, probably the most important work on projection before Monge.
Trajan's Bridge
Trajan's Bridge was the first permanent bridge over the Lower Danube, built 103–105 AD by Trajan to supply his legions in Dacia, probably engineered by Apollodorus of Damascus.
Trans-Iranian Railway
The Trans-Iranian Railway (Persian: راهآهن سراسری ایران) is a 1,394-kilometer line linking the Caspian Sea to the Persian Gulf, built 1927 to 1938 under Reza Shah.
Transatlantic tunnel
The Transatlantic tunnel, or Atlantic tunnel, is a proposed never-built undersea rail link between New York and London, imagined since Jules Verne in 1895 but judged beyond current technology.
Transbay Tube
The Transbay Tube is an immersed tube tunnel that carries BART trains under San Francisco Bay between Oakland and San Francisco, the only rail crossing of the bay.
Transition curve
A transition curve, also known as a spiral easement or transition spiral, is a curve between a straight road or rail section and a circular curve where curvature changes gradually.
Transport Act 1947
The Transport Act 1947 was a United Kingdom law that nationalised most inland transport, placing railways, canals, ports, and road haulage under the British Transport Commission from 1948.
Transport Act 1962
The Transport Act 1962 is a UK Act that abolished the British Transport Commission, splitting its functions among new bodies including the British Railways Board and British Waterways Board.
Transporter bridge
A transporter bridge, also known as a ferry bridge or aerial transfer bridge, is a bridge with a fixed high frame and a suspended gondola that ferries people and vehicles across a river.
Traverse (surveying)
A traverse is a surveying method that calculates the positions of successive stations from measured angles and distances, used to establish control networks where satellite positioning is unsuitable, such as indoors or under tree canopy.
Trench
A trench is a narrow excavation in construction, deeper than it is wide and no wider than 15 feet, dug to install pipes, cables, conduits, and drainage.
Trench dredging and foundations for immersed tube tunnels
Trench dredging and foundations for immersed tube tunnels cover dredging the trench to profile and supporting the elements on screeded gravel beds, pumped sand, grout, or piles.
Trestle bridge
A trestle bridge is a bridge supported by bents or towers, often carrying a series of short spans; it was the workhorse of 19th- and early 20th-century railroad building.
Triborough Bridge
The Triborough Bridge, officially the Robert F. Kennedy Bridge, is a complex of bridges and viaducts linking Manhattan, Queens, and the Bronx in New York City.
Trigonometric levelling
Trigonometric leveling is a surveying method that determines the difference in elevation between two points from a vertical angle and a distance, used in variable terrain where fewer instrument setups are needed.
Trihalomethane
Trihalomethanes (THMs) are halogen-substituted single-carbon compounds of the form CHX₃, formed when drinking water is chlorinated and regulated in the United States as a group of four compounds at 80 µg/L.
Trinity Dam
Trinity Dam is an earthfill dam on the Trinity River in Trinity County, California, completed in 1962. At 538 feet high, it forms Trinity Lake and diverts water to the Sacramento River Basin.
Truss
A truss is a structure of individual members, each in tension or compression, connected at joints in triangular patterns that give rigidity with little material, most prominently in bridges.