Water from the Hills: How Rome Built Its Aqueducts
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Water from the Hills: How Rome Built Its Aqueducts
This episode traces the full life of a Roman aqueduct from the moment a surveyor first walked into the hills with a wooden level, to the last maintenance gang scraping lime scale from the channel walls four centuries later. It is a story less about grand monuments and more about patient, unhurried engineering — a controlled fall of twenty centimetres per kilometre, held steady across fifty miles of Italian landscape with instruments made of wood and cord.
Along the way we follow the specus channel lined in waterproof mortar, the piscinae limariae where suspended silt quietly settled to the floor, the castellum divisorium at the city's edge where a single tank divided the flow between baths and fountains and private houses, and the permanent workforce who walked their stretch of channel every morning, lamp in hand, listening for hollow spots in the plaster. The Aqua Virgo, first built in 19 BC, still carries water to the Trevi Fountain today. For these systems, four or five centuries of continuous operation was simply the expected lifespan.
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