🇫🇷 France · Hydraulic works
Pont du Gard — Roman Aqueduct Bridge
Roman Imperial (Augustan-Claudian, mid-1st c. CE) · Roman Gallia Narbonensis (Nemausus)
Augustinian 48.8-m 3-tier bridge 50-km Nîmes aqueduct 35,000 m³/d, 6-tonne dry stone.
🇫🇷 France · Hydraulic works
Barbegal Roman Aqueduct & Mill Ensemble (Fontvieille, Provence)
Roman Imperial (Hadrian to Severan, 2nd–3rd c CE) · Roman Gallo-Roman (Arelate)
Hadrianic 16-wheel industrial mills (early 2nd c CE) on 9 km aqueducts — Roman factory producing 4.5 t flour/day for Arles.
🇫🇷 France · Hydraulic works
La Coudraie Canalized Salt Marsh & Bri Production Site (Vendée Iron Age)
Iron Age (Hallstatt–La Tène) to early Gallo-Roman · Vendée maritime salt artisans (Armorican → Picton maritime)
Atlantic salt-marsh canal network (2.4 km, 2-4 m wide) feeding 180 evaporation pans producing 30 t sea salt/yr (Iron Age).