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🇮🇷 Iran · Hydraulic works
Sassanid Early (Shapur I, 241–270 CE) built by Roman captives · Sassanid Persian with Roman engineering corps (Legio)
500-m Roman-Sassanid arch bridge/dam (260 CE) raising Karun for Shushtar's 10-km Gargar canal — easternmost Roman dam.
🇮🇷 Iran · Hydraulic works
Achaemenid foundation to Sassanian peak (5th century BCE – 3rd century CE) · Achaemenid, Sassanid Persian (with Roman engineering)
Sassanid re-engineering of the Karun River where the Band-e Kaisar (Caesar's Dam) — said built by Roman soldiers captured with Emperor Valerian — diverted the river into the Gargar canal feeding 40…
