"A conduit for conveying water more particularly applied to structures for conveying water from distant sources for the supply of large cities." — Williams, 1889

Aqueduct

"A conduit for conveying water more particularly applied to structures for conveying water from distant…

This image depicts a market in front of The Aqueduct of Segovia, located in Segovia, Spain. It was built by the Romans to provide water to the city from the Frio River.

Aqueduct

This image depicts a market in front of The Aqueduct of Segovia, located in Segovia, Spain. It was built…

A Claudian aqueduct, a building constructed in honor of Claudius I, a Roman emperor.

Aqueduct

A Claudian aqueduct, a building constructed in honor of Claudius I, a Roman emperor.

Aqueduct through a wooded area.

Aqueduct Near the Battle-Field of Chapultepec

Aqueduct through a wooded area.

"The ruined aqueducts in the Campagna." — Young, 1901

Ruined aqueducts

"The ruined aqueducts in the Campagna." — Young, 1901

The Pont du Gard is an aqueduct and bridge that was built over the Gard River by the Roman Empire. It is located in Southern France, in the Vers-Pont-du-Gard and Remoulins area. The bridge is built on three levels. The lower level has 6 arches and carries a road, the middle level has 11 arches, and the upper level has 35 arches and was used as a water conduit.

Pont du Gard

The Pont du Gard is an aqueduct and bridge that was built over the Gard River by the Roman Empire. It…

"The Pont du Gard near Nimes (ancient Nemausus) in southern France. Built by the emperor Antoninus Pius. The bridge spans two hilltops nearly a thousand feet apart. It carries an aqueduct with three tiers of massive stone arches at a height of 160 feet above the stream. This is the finest and best preserved aqueduct in existence."—Webster, 1913

A Roman Aqueduct

"The Pont du Gard near Nimes (ancient Nemausus) in southern France. Built by the emperor Antoninus Pius.…

"A conduit or canal constructed, especially in a town or city, to carry off superfluous, water, soil, and other matters; a public drain. A, B, C, D, E forms used in London, Paris, and other European cities; F, G, H, I, J, K, L, special forms used in New York and other American cities. F shows a method of repairing with tiles at the bottom of an oval sewer. G, tile-bottomed sewer. H, barrel sewer...of wood bound with iron. I, a form used for large sewers. J, section of pipe sewer. K, half section of sewer having section similar to B, but also provided with a spandrel. L, the aqueduct form, used for large sewers only, it rests on a bed of concrete." —Whitney, 1889

Collection of Sewer Cross-Sections

"A conduit or canal constructed, especially in a town or city, to carry off superfluous, water, soil,…