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Tagsconcrete
2 places carry this tag, across every kind and continent it appears in.
🇩🇪 Germany · Hydraulic works
Roman Imperial (Flavian to Late Roman, 1st–3rd c CE) · Roman Gallo–German (Colonia Agrippina)
95-km Flavian Roman concrete aqueduct (c.80 CE) delivering 20,000 m³/day from Eifel springs to Cologne.
🇪🇬 Egypt · Submerged site
Mid-Holocene reef to Late Roman · Roman Egyptian
Outer reef channel of Myos Hormos — 22 m reef cut with Roman concrete at 2–5 m breach at Marsa Nakari.