Construction
On June 9 Roman general Marcus Agrippa completes the 21-km- (13-mi-) long Aqua Virgo aqueduct, which runs almost completely underground from springs on the estate of Lucullus to the Campus Martius. It brings 104,000,000 L (27,500,000 gal) of water a day to Rome. It has remained in use intermittently until the present day, although sometimes out of order for hundreds of years. See also 33 bce Construction; 2 bce Construction
Agrippa builds the aqueduct at Nemausus (Nîmes), which features the Pont du Gard bridge over the Gardon River. The bridge has three tiers of arches 49 m (160 ft) high and is 274 m (900 ft) long. It is built of stone without cement or mortar and still stands today. An ingenious sluice with three channels is used to guarantee that the flow of water through the aqueduct remains constant. See also 40 bce Construction; 2 bce Construction.
