For #RomanSiteSaturday a section of the #Roman Eifel #aqueduct that supplied water to the city of Cologne. The vaulted underground tunnel with an inspection shaft at Mechernich-Breitenbenden was unearthed during construction work in the late 1970s. The estimated maximum flow rate of the aqueduct was 250 liters per second. At that rate, the aqueduct would have supplied Cologne with 20 million liters of water each day!
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